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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="H02P" definition-exists="true" date-revised="2018-08-01" status="published"><classification-symbol>H02P</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS</text></title-part><title-part><text>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This subclass <u>covers</u> arrangements for starting, regulating, electronically commutating, braking, or otherwise controlling motors, generators, dynamo-electric converters, clutches, brakes, gears, transformers, reactors or choke coils, of the types classified in the relevant subclasses, e.g. <class-ref scheme="cpc">H01F</class-ref>, <class-ref scheme="cpc">H02K</class-ref>.</note-paragraph><note-paragraph>This subclass <u>does not cover</u> similar arrangements for the apparatus of the types classified in subclass <class-ref scheme="cpc">H02N</class-ref>, which arrangements are covered by that subclass.</note-paragraph><note-paragraph>In this subclass, the following terms or expressions are used with the meanings indicated:<subnote type="bullet"><note-paragraph>&quot;control&quot; means influencing a variable in any way, e.g. changing its direction or its value (including changing it to or from zero), maintaining it constant or limiting its range of variation; </note-paragraph><note-paragraph>&quot;regulation&quot; means maintaining a variable at a desired value, or within a desired range of values, by comparison of the actual value with the desired value.</note-paragraph></subnote></note-paragraph><note-paragraph>In this subclass, it is desirable to add the indexing codes of groups <class-ref scheme="cpc">H02P2101/00</class-ref> and <class-ref scheme="cpc">H02P2103/00</class-ref></note-paragraph></note><note type="warning"><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H02P1/00" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/00</classification-symbol>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P1/00" definition-exists="true" ipc-concordant="H02P1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H02P1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for starting electric motors or dynamo-electric converters </text><reference><text>starting of synchronous motors with electronic commutators except reluctance motors, <class-ref scheme="cpc">H02P6/20</class-ref>, <class-ref scheme="cpc">H02P6/22</class-ref>; starting dynamo-electric motors rotating step by step <class-ref scheme="cpc">H02P8/04</class-ref>; vector control <class-ref scheme="cpc">H02P21/00</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="note"><note-paragraph><CPC-specific-note>Group <class-ref scheme="cpc">H02P1/029</class-ref> takes precedence over groups <class-ref scheme="cpc">H02P1/26</class-ref> - <class-ref scheme="cpc">H02P1/54</class-ref>.</CPC-specific-note></note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P1/02" definition-exists="false" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/021" definition-exists="true" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection against &quot;no voltage condition&quot;</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/022" definition-exists="false" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Security devices, e.g. correct phase sequencing</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/023" definition-exists="false" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection against sparking of contacts or sticking together</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/024" definition-exists="false" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection against simultaneous starting by two starting devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/025" definition-exists="false" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection against starting if starting resistor is not at zero position</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/026" definition-exists="false" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for delayed starting</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/027" definition-exists="false" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Special design of starting resistor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/028" definition-exists="false" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the motor voltage is increased at low speed, to start or restart high inertia loads</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/029" definition-exists="true" ipc-concordant="H02P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Restarting, e.g. after power failure</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/04" definition-exists="false" ipc-concordant="H02P1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/06" definition-exists="false" ipc-concordant="H02P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manually-operated multi-position starters</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/08" definition-exists="false" ipc-concordant="H02P1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manually-operated on/off switch controlling power-operated multi-position switch or impedances for starting a motor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/10" definition-exists="true" ipc-concordant="H02P1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manually-operated on/off switch controlling relays or contactors operating sequentially for starting a motor </text><reference><text>sequence determined by power-operated multi-position switch <class-ref scheme="cpc">H02P1/08</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/12" definition-exists="true" ipc-concordant="H02P1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switching devices centrifugally operated by the motor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/14" definition-exists="false" ipc-concordant="H02P1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pressure-sensitive resistors centrifugally operated by the motor</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P1/16" definition-exists="false" ipc-concordant="H02P1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting dynamo-electric motors or dynamo-electric converters</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/163" definition-exists="false" ipc-concordant="H02P1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/163</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for starting an individual reluctance motor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/166" definition-exists="false" ipc-concordant="H02P1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Driving load with high inertia</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/18" definition-exists="true" ipc-concordant="H02P1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting an individual dc motor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/20" definition-exists="true" ipc-concordant="H02P1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by progressive reduction of resistance in series with armature winding</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/22" definition-exists="false" ipc-concordant="H02P1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in either direction of rotation</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/24" definition-exists="true" ipc-concordant="H02P1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H02P1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting an individual ac commutator motor </text><reference><text>starting of ac/dc commutator motors <class-ref scheme="cpc">H02P1/18</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/26" definition-exists="true" ipc-concordant="H02P1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting an individual polyphase induction motor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/265" definition-exists="true" ipc-concordant="H02P1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for starting or running a triphase motor on a single phase supply</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/28" definition-exists="true" ipc-concordant="H02P1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by progressive increase of voltage applied to primary circuit of motor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/30" definition-exists="true" ipc-concordant="H02P1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by progressive increase of frequency of supply to primary circuit of motor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/32" definition-exists="false" ipc-concordant="H02P1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by star-delta switching</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/34" definition-exists="true" ipc-concordant="H02P1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by progressive reduction of impedance in secondary circuit</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P1/36" definition-exists="false" ipc-concordant="H02P1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the impedance being a liquid resistance</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/38" definition-exists="true" ipc-concordant="H02P1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by pole-changing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/40" definition-exists="false" ipc-concordant="H02P1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in either direction of rotation</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/42" definition-exists="true" ipc-concordant="H02P1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting an individual single-phase induction motor </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H02P27/04</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/423" definition-exists="false" ipc-concordant="H02P1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using means to limit the current in the main winding</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/426" definition-exists="true" ipc-concordant="H02P1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a specially adapted frequency converter</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/44" definition-exists="false" ipc-concordant="H02P1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by phase-splitting with a capacitor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P1/445" definition-exists="false" ipc-concordant="H02P1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using additional capacitors switched at start up</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/46" definition-exists="true" ipc-concordant="H02P1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting an individual synchronous motor </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H02P27/04</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/465" definition-exists="false" ipc-concordant="H02P1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for starting an individual single-phase synchronous motor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/48" definition-exists="true" ipc-concordant="H02P1/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by pole-changing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/50" definition-exists="true" ipc-concordant="H02P1/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by changing over from asynchronous to synchronous operation </text><reference><text><class-ref scheme="cpc">H02P1/48</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/52" definition-exists="false" ipc-concordant="H02P1/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by progressive increase of frequency of supply to motor</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P1/54" definition-exists="false" ipc-concordant="H02P1/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting two or more dynamo-electric motors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/56" definition-exists="false" ipc-concordant="H02P1/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>simultaneously</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P1/58" definition-exists="false" ipc-concordant="H02P1/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P1/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>sequentially</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P3/00" definition-exists="true" ipc-concordant="H02P3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H02P3/00</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters </text><reference><text>stopping of synchronous motors with electronic commutators except reluctance motors, <class-ref scheme="cpc">H02P6/24</class-ref>; stopping dynamo-electric motors rotating step by step <class-ref scheme="cpc">H02P8/24</class-ref>; vector control <class-ref scheme="cpc">H02P21/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P3/02" definition-exists="false" ipc-concordant="H02P3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P3/025" definition-exists="false" ipc-concordant="H02P3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>holding the rotor in a fixed position after deceleration</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P3/04" definition-exists="true" ipc-concordant="H02P3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for stopping or slowing by a separate brake, e.g. friction brake, eddy-current brake </text><reference><text>brakes <class-ref scheme="cpc">F16D</class-ref>, <class-ref scheme="cpc">H02K49/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P3/06" definition-exists="false" ipc-concordant="H02P3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P3/065" definition-exists="false" ipc-concordant="H02P3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for stopping or slowing a reluctance motor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P3/08" definition-exists="true" ipc-concordant="H02P3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for stopping or slowing a dc motor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P3/10" definition-exists="false" ipc-concordant="H02P3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by reversal of supply connections</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P3/12" definition-exists="true" ipc-concordant="H02P3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by short-circuit or resistive braking</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P3/14" definition-exists="true" ipc-concordant="H02P3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by regenerative braking</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P3/16" definition-exists="false" ipc-concordant="H02P3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by combined electrical and mechanical braking</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P3/18" definition-exists="true" ipc-concordant="H02P3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for stopping or slowing an ac motor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P3/20" definition-exists="false" ipc-concordant="H02P3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by reversal of phase sequence of connections to the motor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P3/22" definition-exists="true" ipc-concordant="H02P3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by short-circuit or resistive braking</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P3/24" definition-exists="false" ipc-concordant="H02P3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by applying dc to the motor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P3/26" definition-exists="false" ipc-concordant="H02P3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by combined electrical and mechanical braking</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P4/00" definition-exists="true" ipc-concordant="H02P4/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P4/00</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements specially adapted for regulating or controlling the speed or torque of electric motors that can be connected to two or more different electric power supplies </text><reference><text>vector control <class-ref scheme="cpc">H02P21/00</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P5/00" definition-exists="true" ipc-concordant="H02P5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P5/00</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors </text><reference><text><class-ref scheme="cpc">H02P6/04</class-ref>, <class-ref scheme="cpc">H02P8/40</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P5/46" definition-exists="false" ipc-concordant="H02P5/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for speed regulation of two or more dynamo-electric motors in relation to one another</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P5/48" definition-exists="false" ipc-concordant="H02P5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by comparing mechanical values representing the speeds</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P5/485" definition-exists="true" ipc-concordant="H02P5/485" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P5/485</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using differential movement of the two motors, e.g. using differential gearboxes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P5/49" definition-exists="false" ipc-concordant="H02P5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P5/49</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>by intermittently closing or opening electrical contacts</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P5/50" definition-exists="false" ipc-concordant="H02P5/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by comparing electrical values representing the speeds</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P5/505" definition-exists="true" ipc-concordant="H02P5/505" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P5/505</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using equalising lines, e.g. rotor and stator lines of first and second motors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P5/51" definition-exists="true" ipc-concordant="H02P5/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P5/51</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Direct ratio control</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P5/52" definition-exists="true" ipc-concordant="H02P5/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P5/52</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>additionally providing control of relative angular displacement</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P5/54" definition-exists="false" ipc-concordant="H02P5/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P5/54</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Speed and position comparison between the motors by mechanical means</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P5/56" definition-exists="false" ipc-concordant="H02P5/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P5/56</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Speed and position comparison between the motors by electrical means</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P5/60" definition-exists="true" ipc-concordant="H02P5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling combinations of dc and ac dynamo-electric motors </text><reference><text><class-ref scheme="cpc">H02P5/46</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P5/68" definition-exists="true" ipc-concordant="H02P5/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling two or more dc dynamo-electric motors </text><reference><text><class-ref scheme="cpc">H02P5/46</class-ref>, <class-ref scheme="cpc">H02P5/60</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P5/685" definition-exists="false" ipc-concordant="H02P5/685" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/685</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrically connected in series, i.e. carrying the same current</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P5/69" definition-exists="false" ipc-concordant="H02P5/69" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/69</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mechanically coupled by gearing</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P5/695" definition-exists="false" ipc-concordant="H02P5/695" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/695</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Differential gearing</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P5/74" definition-exists="true" ipc-concordant="H02P5/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling two or more ac dynamo-electric motors </text><reference><text><class-ref scheme="cpc">H02P5/46</class-ref>, <class-ref scheme="cpc">H02P5/60</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P5/747" definition-exists="false" ipc-concordant="H02P5/747" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/747</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mechanically coupled by gearing</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P5/753" definition-exists="false" ipc-concordant="H02P5/753" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P5/753</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Differential gearing</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P6/00" definition-exists="true" ipc-concordant="H02P6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P6/00</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position</text></title-part><title-part><text>Electronic commutators therefor </text><reference><text>vector control <class-ref scheme="cpc">H02P21/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>Group <class-ref scheme="cpc">H02P6/26</class-ref> takes precedence over groups <class-ref scheme="cpc">H02P6/04</class-ref>&#8211;<class-ref scheme="cpc">H02P6/24</class-ref> and <class-ref scheme="cpc">H02P6/28</class-ref> &#8211; <class-ref scheme="cpc">H02P6/34</class-ref></note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/005" definition-exists="false" ipc-concordant="H02P6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for controlling doubly fed motors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/006" definition-exists="false" ipc-concordant="H02P6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling linear motors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/007" definition-exists="false" ipc-concordant="H02P6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the position is detected using the ripple of the current caused by the commutation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/04" definition-exists="true" ipc-concordant="H02P6/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P6/04</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for controlling or regulating the speed or torque of more than one motor </text><reference><text><class-ref scheme="cpc">H02P6/10</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H02P6/045" definition-exists="false" ipc-concordant="H02P6/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2006/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of current</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/06" definition-exists="false" ipc-concordant="H02P6/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/08" definition-exists="true" ipc-concordant="H02P6/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P6/08</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for controlling the speed or torque of a single motor </text><reference><text><class-ref scheme="cpc">H02P6/10</class-ref>, <class-ref scheme="cpc">H02P6/28</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P6/085" definition-exists="false" ipc-concordant="H02P6/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a bridge configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/10" definition-exists="true" ipc-concordant="H02P6/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P6/10</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for controlling torque ripple, e.g. providing reduced torque ripple</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/12" definition-exists="false" ipc-concordant="H02P6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring commutation</text></title-part><title-part><text>Providing indication of commutation failure</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/14" definition-exists="false" ipc-concordant="H02P6/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electronic commutators</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P6/15" definition-exists="true" ipc-concordant="H02P6/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/15</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling commutation time</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P6/153" definition-exists="false" ipc-concordant="H02P6/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/153</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>wherein the commutation is advanced from position signals phase in function of the speed</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P6/157" definition-exists="false" ipc-concordant="H02P6/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/157</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>wherein the commutation is function of electro-magnetic force [EMF]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P6/16" definition-exists="true" ipc-concordant="H02P6/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/16</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Circuit arrangements for detecting position</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P6/17" definition-exists="false" ipc-concordant="H02P6/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/17</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>and for generating speed information</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P6/18" definition-exists="true" ipc-concordant="H02P6/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/18</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>without separate position detecting elements</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P6/181" definition-exists="false" ipc-concordant="H02P6/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using different methods depending on the speed</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P6/182" definition-exists="false" ipc-concordant="H02P6/182" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/182</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using back-emf in windings</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P6/183" definition-exists="false" ipc-concordant="H02P6/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an injected high frequency signal</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P6/185" definition-exists="true" ipc-concordant="H02P6/185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/185</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using inductance sensing, e.g. pulse excitation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P6/186" definition-exists="false" ipc-concordant="H02P6/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using difference of inductance or reluctance between the phases</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P6/187" definition-exists="false" ipc-concordant="H02P6/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the star point voltage</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P6/188" definition-exists="false" ipc-concordant="H02P6/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the voltage difference between the windings </text><reference><text><class-ref scheme="cpc">H02P6/182</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/20" definition-exists="true" ipc-concordant="H02P6/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/20</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for starting </text><reference><text><class-ref scheme="cpc">H02P6/08</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P6/21" definition-exists="true" ipc-concordant="H02P6/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/21</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Open loop start</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P6/22" definition-exists="true" ipc-concordant="H02P6/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/22</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>in a selected direction of rotation</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/24" definition-exists="false" ipc-concordant="H02P6/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P6/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for stopping</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/26" definition-exists="false" ipc-concordant="H02P6/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/26</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for controlling single phase motors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/28" definition-exists="true" ipc-concordant="H02P6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/28</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for controlling current </text><reference><text><class-ref scheme="cpc">H02P6/10</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/30" definition-exists="true" ipc-concordant="H02P6/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/30</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for controlling the direction of rotation </text><reference><text><class-ref scheme="cpc">H02P6/22</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/32" definition-exists="false" ipc-concordant="H02P6/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P6/32</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for controlling wound field motors, e.g. motors with exciter coils</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P6/34" definition-exists="false" ipc-concordant="H02P6/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P6/34</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Modelling or simulation for control purposes</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P7/00" definition-exists="true" ipc-concordant="H02P7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P7/00</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for regulating or controlling the speed or torque of electric DC motors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P7/0094" definition-exists="false" ipc-concordant="H02P7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/0094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the position is detected using the ripple of the current caused by the commutator</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P7/02" definition-exists="false" ipc-concordant="H02P7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P7/02</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>the DC motors being of the linear type</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P7/025" definition-exists="false" ipc-concordant="H02P7/025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P7/025</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>the DC motors being of the moving coil type, e.g. voice coil motors</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P7/03" definition-exists="false" ipc-concordant="H02P7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/03</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>for controlling the direction of rotation of DC motors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P7/04" definition-exists="false" ipc-concordant="H02P7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/04</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>by means of a H-bridge circuit</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P7/05" definition-exists="false" ipc-concordant="H02P7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/05</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>by means of electronic switching</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P7/06" definition-exists="false" ipc-concordant="H02P7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P7/063" definition-exists="false" ipc-concordant="H02P7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using centrifugal devices, e.g. switch, resistor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P7/066" definition-exists="true" ipc-concordant="H02P7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a periodic interrupter, e.g. Tirrill regulator</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P7/08" definition-exists="false" ipc-concordant="H02P7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by manual control without auxiliary power</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/10" definition-exists="false" ipc-concordant="H02P7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of motor field only</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P7/12" definition-exists="false" ipc-concordant="H02P7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switching field from series to shunt excitation or <u>vice versa</u></text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/14" definition-exists="true" ipc-concordant="H02P7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of voltage applied to the armature with or without control of field </text><CPC-specific-text><text>Ward-Leonard</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P7/18" definition-exists="false" ipc-concordant="H02P7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by master control with auxiliary power</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/20" definition-exists="true" ipc-concordant="H02P7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multi-position switch, e.g. drum, controlling motor circuit by means of relays </text><reference><text><class-ref scheme="cpc">H02P7/24</class-ref>, <class-ref scheme="cpc">H02P7/30</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/22" definition-exists="true" ipc-concordant="H02P7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multi-position switch, e.g. drum, controlling motor circuit by means of pilot-motor-operated multi-position switch or pilot-motor-operated variable resistance </text><reference><text><class-ref scheme="cpc">H02P7/24</class-ref>, <class-ref scheme="cpc">H02P7/30</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/24" definition-exists="false" ipc-concordant="H02P7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using discharge tubes or semiconductor devices</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P7/245" definition-exists="false" ipc-concordant="H02P7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P7/26" definition-exists="false" ipc-concordant="H02P7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using discharge tubes</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H02P7/265" definition-exists="false" ipc-concordant="H02P7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P7/28" definition-exists="false" ipc-concordant="H02P7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using semiconductor devices</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H02P7/2805" definition-exists="false" ipc-concordant="H02P7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/2805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H02P7/281" definition-exists="true" ipc-concordant="H02P7/281" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/281</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>the DC motor being operated in four quadrants</text></title-part></class-title><notes-and-warnings><note type="note"><note-paragraph>Group <class-ref scheme="cpc">H02P7/281</class-ref> takes precedence over groups <class-ref scheme="cpc">H02P7/282</class-ref> &#8211; <class-ref scheme="cpc">H02P7/298</class-ref>.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H02P7/2815" definition-exists="false" ipc-concordant="H02P7/281" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/2815</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H02P7/282" definition-exists="false" ipc-concordant="H02P7/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling field supply only</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H02P7/2825" definition-exists="false" ipc-concordant="H02P7/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/2825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H02P7/285" definition-exists="false" ipc-concordant="H02P7/285" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling armature supply only</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H02P7/2855" definition-exists="false" ipc-concordant="H02P7/285" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/2855</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H02P7/288" definition-exists="true" ipc-concordant="H02P7/288" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using variable impedance</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H02P7/2885" definition-exists="false" ipc-concordant="H02P7/288" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/2885</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H02P7/29" definition-exists="false" ipc-concordant="H02P7/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/29</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using pulse modulation</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H02P7/291" definition-exists="true" ipc-concordant="H02P7/291" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/291</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>with on-off control between two set points, e.g. controlling by hysteresis</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H02P7/2913" definition-exists="false" ipc-concordant="H02P7/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/2913</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H02P7/292" definition-exists="false" ipc-concordant="H02P7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/292</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using static converters, e.g. AC to DC</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H02P7/293" definition-exists="true" ipc-concordant="H02P7/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P7/293</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using phase control </text><reference><text><class-ref scheme="cpc">H02P7/295</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H02P7/295" definition-exists="true" ipc-concordant="H02P7/295" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/295</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the kind having a thyristor or the like in series with the power supply and the motor</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H02P7/298" definition-exists="false" ipc-concordant="H02P7/298" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/298</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling armature and field supply</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H02P7/2985" definition-exists="false" ipc-concordant="H02P7/298" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/2985</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/30" definition-exists="false" ipc-concordant="H02P7/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic devices with controllable degree of saturation, i.e. transductors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P7/305" definition-exists="false" ipc-concordant="H02P7/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/32" definition-exists="true" ipc-concordant="H02P7/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using armature-reaction-excited machines, e.g. metadyne, amplidyne, rototrol</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P7/325" definition-exists="false" ipc-concordant="H02P7/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/34" definition-exists="true" ipc-concordant="H02P7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P7/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using Ward-Leonard arrangements</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P7/343" definition-exists="false" ipc-concordant="H02P7/343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P7/343</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>in which both generator and motor fields are controlled</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P7/347" definition-exists="false" ipc-concordant="H02P7/347" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P7/347</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>in which only the generator field is controlled</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P7/348" definition-exists="false" ipc-concordant="H02P7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>H02P7/348</classification-symbol><class-title date-revised="2015-10-01"><title-part><CPC-specific-text><text>for changing between series and parallel connections of motors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P8/00" definition-exists="true" ipc-concordant="H02P8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling dynamo-electric motors of the kind having motors rotating step by step </text><reference><text>vector control <class-ref scheme="cpc">H02P21/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/005" definition-exists="false" ipc-concordant="H02P8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of linear motors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/02" definition-exists="false" ipc-concordant="H02P8/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H02P8/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for single-phase or bi-pole stepper motors, e.g. watch-motors, clock-motors</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>Groups <class-ref scheme="cpc">H02P8/005</class-ref> and <class-ref scheme="cpc">H02P8/02</class-ref> take precedence over groups <class-ref scheme="cpc">H02P8/04</class-ref>&#160;-&#160;<class-ref scheme="cpc">H02P8/42</class-ref></note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/04" definition-exists="false" ipc-concordant="H02P8/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for starting</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/06" definition-exists="false" ipc-concordant="H02P8/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in selected direction of rotation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/08" definition-exists="false" ipc-concordant="H02P8/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining position before starting</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/10" definition-exists="false" ipc-concordant="H02P8/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shaping pulses for starting</text></title-part><title-part><text>Boosting current during starting</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/12" definition-exists="true" ipc-concordant="H02P8/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control or stabilisation of current</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/14" definition-exists="true" ipc-concordant="H02P8/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling speed or speed and torque </text><reference><text><class-ref scheme="cpc">H02P8/12</class-ref>, <class-ref scheme="cpc">H02P8/22</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/16" definition-exists="true" ipc-concordant="H02P8/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reducing energy dissipated or supplied</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P8/165" definition-exists="false" ipc-concordant="H02P8/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using two level supply voltage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/18" definition-exists="true" ipc-concordant="H02P8/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shaping of pulses, e.g. to reduce torque ripple</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/20" definition-exists="false" ipc-concordant="H02P8/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by bidirectional operation</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/22" definition-exists="true" ipc-concordant="H02P8/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H02P8/22</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Control of step size</text></title-part><title-part><text>Intermediate stepping, e.g. microstepping</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/24" definition-exists="true" ipc-concordant="H02P8/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for stopping </text><reference><text><class-ref scheme="cpc">H02P8/32</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/26" definition-exists="false" ipc-concordant="H02P8/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memorising final pulse when stopping</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/28" definition-exists="false" ipc-concordant="H02P8/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disconnecting power source when stopping</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/30" definition-exists="false" ipc-concordant="H02P8/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Holding position when stopped</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/32" definition-exists="false" ipc-concordant="H02P8/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reducing overshoot or oscillation, e.g. damping</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/34" definition-exists="true" ipc-concordant="H02P8/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring operation </text><reference><text><class-ref scheme="cpc">H02P8/36</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/36" definition-exists="true" ipc-concordant="H02P8/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Protection against faults, e.g. against overheating, step-out</text></title-part><title-part><text>Indicating faults </text><reference><text>emergency protective arrangements with automatic interruption of supply <class-ref scheme="cpc">H02H7/08</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P8/38" definition-exists="false" ipc-concordant="H02P8/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fault being step-out</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/40" definition-exists="false" ipc-concordant="H02P8/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P8/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Special adaptations for controlling two or more stepping motors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P8/42" definition-exists="false" ipc-concordant="H02P8/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P8/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by non-stepper motors being operated step by step</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P9/00" definition-exists="true" ipc-concordant="H02P9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling electric generators for the purpose of obtaining a desired output </text><reference><text>Ward-Leonard arrangements <class-ref scheme="cpc">H02P7/34</class-ref>; vector control <class-ref scheme="cpc">H02P21/00</class-ref>; feeding a network by two or more generators <class-ref scheme="cpc">H02J</class-ref>; for charging batteries <class-ref scheme="cpc">H02J7/14</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/006" definition-exists="true" ipc-concordant="H02P9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for protecting the generator by using control </text><reference><text><class-ref scheme="cpc">H02H7/06</class-ref> takes precedence; control effected upon generator excitation circuit to reduce harmful effects of overloads or transients <class-ref scheme="cpc">H02P9/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/007" definition-exists="true" ipc-concordant="H02P9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control circuits for doubly fed generators</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/008" definition-exists="false" ipc-concordant="H02P9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the generator is controlled by the requirements of the prime mover</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/009" definition-exists="false" ipc-concordant="H02P9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuit arrangements for detecting rotor position</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/02" definition-exists="false" ipc-concordant="H02P9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/04" definition-exists="false" ipc-concordant="H02P9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control effected upon non-electric prime mover and dependent upon electric output value of the generator </text><reference><text>effecting control of the prime mover in general, <u>see</u> the relevant class for such prime mover</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/06" definition-exists="false" ipc-concordant="H02P9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control effected upon clutch or other mechanical power transmission means and dependent upon electric output value of the generator </text><reference><text>effecting control of the power transmission means, <u>see</u> the relevant class for such means</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/08" definition-exists="false" ipc-concordant="H02P9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/10" definition-exists="false" ipc-concordant="H02P9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/102" definition-exists="false" ipc-concordant="H02P9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for limiting effects of transients</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/105" definition-exists="false" ipc-concordant="H02P9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for increasing the stability</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/107" definition-exists="false" ipc-concordant="H02P9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for limiting effects of overloads</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/12" definition-exists="false" ipc-concordant="H02P9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for demagnetising</text></title-part><title-part><text>for reducing effects of remanence</text></title-part><title-part><text>for preventing pole reversal</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P9/123" definition-exists="false" ipc-concordant="H02P9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for demagnetising; for reducing effects of remanence</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P9/126" definition-exists="false" ipc-concordant="H02P9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for preventing pole reversal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/14" definition-exists="true" ipc-concordant="H02P9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by variation of field </text><reference><text><class-ref scheme="cpc">H02P9/08</class-ref>, <class-ref scheme="cpc">H02P9/10</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/16" definition-exists="false" ipc-concordant="H02P9/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P9/18" definition-exists="false" ipc-concordant="H02P9/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the switching being caused by a servomotor, measuring instrument, or relay</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/20" definition-exists="false" ipc-concordant="H02P9/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>due to variation of continuously-variable ohmic resistance</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P9/22" definition-exists="false" ipc-concordant="H02P9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising carbon pile resistance</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/24" definition-exists="true" ipc-concordant="H02P9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/26" definition-exists="true" ipc-concordant="H02P9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using discharge tubes or semiconductor devices </text><reference><text><class-ref scheme="cpc">H02P9/34</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P9/28" definition-exists="false" ipc-concordant="H02P9/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using discharge tubes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P9/30" definition-exists="false" ipc-concordant="H02P9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using semiconductor devices</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P9/302" definition-exists="false" ipc-concordant="H02P9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Brushless excitation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P9/305" definition-exists="true" ipc-concordant="H02P9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlling voltage </text><reference><text><class-ref scheme="cpc">H02P9/302</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H02P9/307" definition-exists="false" ipc-concordant="H02P9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>more than one voltage output</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/32" definition-exists="true" ipc-concordant="H02P9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic devices with controllable degree of saturation </text><reference><text><class-ref scheme="cpc">H02P9/34</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/34" definition-exists="false" ipc-concordant="H02P9/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic devices with controllable degree of saturation in combination with controlled discharge tube or controlled semiconductor device</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/36" definition-exists="false" ipc-concordant="H02P9/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using armature-reaction-excited machines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P9/38" definition-exists="false" ipc-concordant="H02P9/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Self-excitation by current derived from rectification of both output voltage and output current of generator</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/40" definition-exists="false" ipc-concordant="H02P9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by variation of reluctance of magnetic circuit of generator</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/42" definition-exists="true" ipc-concordant="H02P9/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>to obtain desired frequency without varying speed of the generator</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/44" definition-exists="false" ipc-concordant="H02P9/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of frequency and voltage in predetermined relation, e.g. constant ratio</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/46" definition-exists="false" ipc-concordant="H02P9/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P9/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of asynchronous generator by variation of capacitor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P9/48" definition-exists="true" ipc-concordant="H02P9/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H02P9/48</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle </text><reference><text><class-ref scheme="cpc">H02P9/04</class-ref>&#160;-&#160;<class-ref scheme="cpc">H02P9/46</class-ref> take precedence</text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P11/00" definition-exists="true" ipc-concordant="H02P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling dynamo-electric converters </text><reference><text>starting <class-ref scheme="cpc">H02P1/00</class-ref>; stopping or slowing <class-ref scheme="cpc">H02P3/00</class-ref>; vector control <class-ref scheme="cpc">H02P21/00</class-ref>; feeding a network in conjunction with a generator or another converter <class-ref scheme="cpc">H02J</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P11/04" definition-exists="false" ipc-concordant="H02P11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P11/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for controlling dynamo-electric converters having a dc output</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P11/06" definition-exists="false" ipc-concordant="H02P11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for controlling dynamo-electric converters having an ac output</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P13/00" definition-exists="true" ipc-concordant="H02P13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output </text><reference><text>regulation systems using transformers, reactors or choke coils <class-ref scheme="cpc">G05F</class-ref>; transformers <class-ref scheme="cpc">H01F</class-ref>; feeding a network in conjunction with a generator or a converter <class-ref scheme="cpc">H02J</class-ref>; control or regulation of converters <class-ref scheme="cpc">H02M</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P13/06" definition-exists="false" ipc-concordant="H02P13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by tap-changing</text></title-part><title-part><text>by rearranging interconnections of windings</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P13/08" definition-exists="false" ipc-concordant="H02P13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sliding current collector along winding</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P13/10" definition-exists="false" ipc-concordant="H02P13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by moving core, coil winding, or shield, e.g. by induction regulator</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P13/12" definition-exists="false" ipc-concordant="H02P13/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P13/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by varying magnetic bias</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P15/00" definition-exists="true" ipc-concordant="H02P15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H02P15/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling dynamo-electric brakes or clutches </text><reference><text>controlling speed of dynamo-electric motors by means of a separate brake <class-ref scheme="cpc">H02P29/04</class-ref>, vector control <class-ref scheme="cpc">H02P21/00</class-ref> </text><CPC-specific-text><text><u>see</u> provisionally also <class-ref scheme="cpc">H02K49/00</class-ref> and <class-ref scheme="cpc">H02P29/0022</class-ref></text></CPC-specific-text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P15/02" definition-exists="false" ipc-concordant="H02P15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conjoint control of brakes and clutches</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P17/00" definition-exists="true" ipc-concordant="H02P17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P17/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling dynamo-electric gears </text><reference><text>vector control <class-ref scheme="cpc">H02P21/00</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P21/00" definition-exists="true" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>When classifying in this group, classification should also be made in group <class-ref scheme="cpc">H02P25/00</class-ref> when the method of control is characterised by the kind of motor being controlled. </note-paragraph><note-paragraph>When classifying in this group, classification should also be made in group <class-ref scheme="cpc">H02P27/00</class-ref> when the method of control is characterised by the kind of supply voltage of the motor being controlled. </note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/0003" definition-exists="true" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H02P21/0003</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/0007" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using sliding mode control</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/001" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fuzzy control</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/0014" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using neural networks</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/0017" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/0017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Model reference adaptation, e.g. MRAS or MRAC, useful for control or parameter estimation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/0021" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using different modes of control depending on a parameter, e.g. the speed</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/0025" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>implementing a off line learning phase to determine and store useful data for on-line control</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/0085" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for high speeds, e.g. above nominal speed</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/0089" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/0089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using field weakening</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/02" definition-exists="false" ipc-concordant="H02P21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for optimising the efficiency at low load</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/04" definition-exists="true" ipc-concordant="H02P21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/04</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>specially adapted for very low speeds</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/05" definition-exists="true" ipc-concordant="H02P21/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for damping motor oscillations, e.g. for reducing hunting</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/06" definition-exists="true" ipc-concordant="H02P21/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/06</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Rotor flux based control involving the use of rotor position or rotor speed sensors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/08" definition-exists="false" ipc-concordant="H02P21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/08</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Indirect field-oriented control</text></title-part><title-part><text>Rotor flux feed-forward control</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P21/09" definition-exists="false" ipc-concordant="H02P21/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/09</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Field phase angle calculation based on rotor voltage equation by adding slip frequency and speed proportional frequency</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/10" definition-exists="false" ipc-concordant="H02P21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/10</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Direct field-oriented control</text></title-part><title-part><text>Rotor flux feed-back control</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/12" definition-exists="true" ipc-concordant="H02P21/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/12</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Stator flux based control involving the use of rotor position or rotor speed sensors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/13" definition-exists="false" ipc-concordant="H02P21/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Observer control, e.g. using Luenberger observers or Kalman filters</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/14" definition-exists="false" ipc-concordant="H02P21/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/14</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Estimation or adaptation of machine parameters, e.g. flux, current or voltage</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/141" definition-exists="false" ipc-concordant="H02P21/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/141</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flux estimation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/143" definition-exists="false" ipc-concordant="H02P21/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P21/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inertia or moment of inertia estimation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/16" definition-exists="true" ipc-concordant="H02P21/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/16</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Estimation of constants, e.g. the rotor time constant</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/18" definition-exists="false" ipc-concordant="H02P21/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/18</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Estimation of position or speed</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/20" definition-exists="false" ipc-concordant="H02P21/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/20</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Estimation of torque</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/22" definition-exists="false" ipc-concordant="H02P21/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/22</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Current control, e.g. using a current control loop</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/24" definition-exists="false" ipc-concordant="H02P21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/24</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Vector control not involving the use of rotor position or rotor speed sensors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/26" definition-exists="false" ipc-concordant="H02P21/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/26</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Rotor flux based control</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/28" definition-exists="false" ipc-concordant="H02P21/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/28</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Stator flux based control</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P21/30" definition-exists="false" ipc-concordant="H02P21/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/30</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Direct torque control [DTC] or field acceleration method [FAM]</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P21/32" definition-exists="true" ipc-concordant="H02P21/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/32</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Determining the initial rotor position </text><reference><text><class-ref scheme="cpc">H02P21/34</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/34" definition-exists="false" ipc-concordant="H02P21/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/34</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for starting</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/36" definition-exists="false" ipc-concordant="H02P21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/36</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for braking or slowing</text></title-part><title-part><text>Four quadrant control</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P21/50" definition-exists="false" ipc-concordant="H02P21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P21/50</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>Vector control arrangements or methods not otherwise provided for in <class-ref scheme="cpc">H02P21/00</class-ref>- <class-ref scheme="cpc">H02P21/36</class-ref></text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P23/00" definition-exists="true" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/00</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements or methods for the control of AC motors characterised by a control method other than vector control</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>When classifying in this group, subject matter also relating to groups <class-ref scheme="cpc">H02P21/00</class-ref>, <class-ref scheme="cpc">H02P25/00</class-ref> or <class-ref scheme="cpc">H02P27/00</class-ref> is further classified in those groups whenever appropriate.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/0004" definition-exists="true" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H02P23/0004</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/0009" definition-exists="false" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using sliding mode control</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/0013" definition-exists="false" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fuzzy control</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/0018" definition-exists="false" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using neural networks</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/0022" definition-exists="false" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/0022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Model reference adaptation, e.g. MRAS or MRAC, useful for control or parameter estimation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/0027" definition-exists="false" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using different modes of control depending on a parameter, e.g. the speed</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/0031" definition-exists="false" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>implementing a off line learning phase to determine and store useful data for on-line control</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/0077" definition-exists="true" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/0077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characterised by the use of a particular software algorithm</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/0086" definition-exists="false" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/0086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for high speeds, e.g. above nominal speed</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/009" definition-exists="false" ipc-concordant="H02P23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using field weakening</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/02" definition-exists="false" ipc-concordant="H02P23/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for optimising the efficiency at low load</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/03" definition-exists="false" ipc-concordant="H02P23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for very low speeds</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/04" definition-exists="true" ipc-concordant="H02P23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for damping motor oscillations, e.g. for reducing hunting</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/06" definition-exists="false" ipc-concordant="H02P23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling the motor in four quadrants</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/07" definition-exists="false" ipc-concordant="H02P23/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/07</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Polyphase or monophase asynchronous induction motors</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/08" definition-exists="false" ipc-concordant="H02P23/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling based on slip frequency, e.g. adding slip frequency and speed proportional frequency</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/10" definition-exists="true" ipc-concordant="H02P23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling by adding a dc current </text><reference><text>dc current braking <class-ref scheme="cpc">H02P3/24</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/12" definition-exists="false" ipc-concordant="H02P23/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Observer control, e.g. using Luenberger observers or Kalman filters</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/14" definition-exists="false" ipc-concordant="H02P23/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P23/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/16" definition-exists="true" ipc-concordant="H02P23/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/16</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling the angular speed of one shaft </text><reference><text><class-ref scheme="cpc">H02P23/18</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/18" definition-exists="true" ipc-concordant="H02P23/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/18</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling the angular speed together with angular position or phase</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/183" definition-exists="true" ipc-concordant="H02P23/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/183</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>of one shaft without controlling the prime mover</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P23/186" definition-exists="true" ipc-concordant="H02P23/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/186</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>of one shaft by controlling the prime mover</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/20" definition-exists="false" ipc-concordant="H02P23/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/20</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling the acceleration or deceleration</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/22" definition-exists="false" ipc-concordant="H02P23/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/22</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling the speed digitally using a reference oscillator, a speed proportional pulse rate feedback and a digital comparator</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/24" definition-exists="false" ipc-concordant="H02P23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/24</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling the direction, e.g. clockwise or counterclockwise</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/26" definition-exists="true" ipc-concordant="H02P23/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/26</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Power factor control [PFC]</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/28" definition-exists="false" ipc-concordant="H02P23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/28</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P23/30" definition-exists="true" ipc-concordant="H02P23/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P23/30</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Direct torque control [DTC] or field acceleration method [FAM]</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P25/00" definition-exists="true" ipc-concordant="H02P25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P25/00</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>When classifying in this group, subject matter also relating to groups <class-ref scheme="cpc">H02P21/00</class-ref>, <class-ref scheme="cpc">H02P23/00</class-ref> or <class-ref scheme="cpc">H02P27/00</class-ref> is further classified in those groups whenever appropriate.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P25/02" definition-exists="false" ipc-concordant="H02P25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the kind of motor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/022" definition-exists="false" ipc-concordant="H02P25/022" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/022</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Synchronous motors </text><reference><text><class-ref scheme="cpc">H02P25/064</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/024" definition-exists="false" ipc-concordant="H02P25/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/024</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>controlled by supply frequency</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P25/026" definition-exists="true" ipc-concordant="H02P25/026" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/026</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>thereby detecting the rotor position</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/028" definition-exists="true" ipc-concordant="H02P25/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/028</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>with four quadrant control</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/03" definition-exists="false" ipc-concordant="H02P25/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/03</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>with brushless excitation</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/032" definition-exists="false" ipc-concordant="H02P25/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P25/032</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Reciprocating, oscillating or vibrating motors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/034" definition-exists="true" ipc-concordant="H02P25/034" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/034</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Voice coil motors </text><reference><text>voice coil motors driven by DC power <class-ref scheme="cpc">H02P7/025</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/04" definition-exists="false" ipc-concordant="H02P25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Single phase motors, e.g. capacitor motors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/06" definition-exists="false" ipc-concordant="H02P25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Linear motors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/062" definition-exists="false" ipc-concordant="H02P25/062" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/062</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>of the induction type</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/064" definition-exists="false" ipc-concordant="H02P25/064" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/064</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>of the synchronous type</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P25/066" definition-exists="false" ipc-concordant="H02P25/066" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/066</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>of the stepping type</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/08" definition-exists="false" ipc-concordant="H02P25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reluctance motors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/0805" definition-exists="false" ipc-concordant="H02P25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P25/0805</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/083" definition-exists="true" ipc-concordant="H02P25/083" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/083</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for increasing the switching speed from one coil to the next one</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/086" definition-exists="false" ipc-concordant="H02P25/086" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/086</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Commutation</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P25/089" definition-exists="true" ipc-concordant="H02P25/089" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/089</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Sensorless control </text><reference><text>direct torque control <class-ref scheme="cpc">H02P23/30</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/092" definition-exists="false" ipc-concordant="H02P25/092" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P25/092</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Converters specially adapted for controlling reluctance motors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P25/0925" definition-exists="false" ipc-concordant="H02P25/092" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P25/0925</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>wherein the converter comprises only one switch per phase</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/098" definition-exists="true" ipc-concordant="H02P25/098" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P25/098</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements for reducing torque ripple</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/10" definition-exists="true" ipc-concordant="H02P25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Commutator motors, e.g. repulsion motors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/102" definition-exists="true" ipc-concordant="H02P25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Repulsion motors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/105" definition-exists="false" ipc-concordant="H02P25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Four quadrant control</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/107" definition-exists="false" ipc-concordant="H02P25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polyphase or monophase commutator motors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/12" definition-exists="true" ipc-concordant="H02P25/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with shiftable brushes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/14" definition-exists="true" ipc-concordant="H02P25/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Universal motors </text><reference><text><class-ref scheme="cpc">H02P25/12</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P25/145" definition-exists="false" ipc-concordant="H02P25/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>H02P25/145</classification-symbol><class-title date-revised="2015-10-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value, speed feedback</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P25/16" definition-exists="false" ipc-concordant="H02P25/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the circuit arrangement or by the kind of wiring</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/18" definition-exists="false" ipc-concordant="H02P25/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with arrangements for switching the windings, e.g. with mechanical switches or relays</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/182" definition-exists="false" ipc-concordant="H02P25/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by using centrifucal devices, e.g. switch, resistor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/184" definition-exists="false" ipc-concordant="H02P25/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H02P25/184</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>wherein the motor speed is changed by switching from a delta to a star, e.g. wye, connection of its windings, or <u>vice versa</u></text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/186" definition-exists="true" ipc-concordant="H02P25/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by using a periodic interrupter </text><reference><text><class-ref scheme="cpc">H02P25/30</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/188" definition-exists="false" ipc-concordant="H02P25/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H02P25/188</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>wherein the motor windings are switched from series to parallel or <u>vice versa</u> to control speed or torque</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/20" definition-exists="true" ipc-concordant="H02P25/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for pole-changing</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/22" definition-exists="false" ipc-concordant="H02P25/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple windings</text></title-part><title-part><text>Windings for more than three phases</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/24" definition-exists="false" ipc-concordant="H02P25/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Variable impedance in stator or rotor circuit</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/26" definition-exists="false" ipc-concordant="H02P25/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with arrangements for controlling secondary impedance</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/28" definition-exists="false" ipc-concordant="H02P25/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic devices with controllable degree of saturation, e.g. transductors</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/30" definition-exists="false" ipc-concordant="H02P25/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the motor being controlled by a control effected upon an ac generator supplying it</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P25/32" definition-exists="false" ipc-concordant="H02P25/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using discharge tubes</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P25/325" definition-exists="false" ipc-concordant="H02P25/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P25/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P27/00" definition-exists="true" ipc-concordant="H02P27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P27/00</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Arrangements or methods for the control of AC motors characterised by the kind of supply voltage </text><reference><text>of two or more motors <class-ref scheme="cpc">H02P5/00</class-ref>; of synchronous motors with electronic commutators <class-ref scheme="cpc">H02P6/00</class-ref>; of DC motors <class-ref scheme="cpc">H02P7/00</class-ref>; of stepping motors <class-ref scheme="cpc">H02P8/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>When classifying in this group, subject matter also relating to groups <class-ref scheme="cpc">H02P21/00</class-ref>, <class-ref scheme="cpc">H02P23/00</class-ref> or <class-ref scheme="cpc">H02P25/00</class-ref> is further classified in those groups whenever appropriate</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P27/02" definition-exists="false" ipc-concordant="H02P27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using supply voltage with constant frequency and variable amplitude</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P27/024" definition-exists="false" ipc-concordant="H02P27/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P27/024</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using AC supply for only the rotor circuit or only the stator circuit</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P27/026" definition-exists="false" ipc-concordant="H02P27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P27/04" definition-exists="false" ipc-concordant="H02P27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using variable-frequency supply voltage, e.g. inverter or converter supply voltage</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P27/045" definition-exists="false" ipc-concordant="H02P27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P27/047" definition-exists="false" ipc-concordant="H02P27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>V/F converter, wherein the voltage is controlled proportionally with the frequency</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P27/048" definition-exists="false" ipc-concordant="H02P27/048" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P27/048</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using AC supply for only the rotor circuit or only the stator circuit</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P27/05" definition-exists="true" ipc-concordant="H02P27/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P27/05</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>using AC supply for both the rotor and the stator circuits, the frequency of supply to at least one circuit being variable</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P27/06" definition-exists="true" ipc-concordant="H02P27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using dc to ac converters or inverters </text><reference><text><class-ref scheme="cpc">H02P27/05</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P27/08" definition-exists="false" ipc-concordant="H02P27/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pulse width modulation</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P27/085" definition-exists="false" ipc-concordant="H02P27/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P27/10" definition-exists="true" ipc-concordant="H02P27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using bang-bang controllers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P27/12" definition-exists="true" ipc-concordant="H02P27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P27/12</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P27/14" definition-exists="false" ipc-concordant="H02P27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with three or more levels of voltage</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P27/16" definition-exists="true" ipc-concordant="H02P27/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ac to ac converters without intermediate conversion to dc </text><reference><text><class-ref scheme="cpc">H02P27/05</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P27/18" definition-exists="false" ipc-concordant="H02P27/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P27/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>varying the frequency by omitting half waves</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P29/00" definition-exists="true" ipc-concordant="H02P29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P29/00</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors </text><reference><text>arrangements for starting electric motors <class-ref scheme="cpc">H02P1/00</class-ref>; arrangements for stopping or slowing electric motors <class-ref scheme="cpc">H02P3/00</class-ref>; control of motors that can be connected to two or more different electric power supplies <class-ref scheme="cpc">H02P4/00</class-ref>; regulating or controlling the speed or torque of two or more electric motors <class-ref scheme="cpc">H02P5/00</class-ref>; vector control <class-ref scheme="cpc">H02P21/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P29/0016" definition-exists="true" ipc-concordant="H02P29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P29/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of angular speed of one shaft without controlling the prime mover</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/0022" definition-exists="false" ipc-concordant="H02P29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P29/0022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling a brake between the prime mover and the load</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/0027" definition-exists="false" ipc-concordant="H02P29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P29/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling a clutch between the prime mover and the load</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P29/02" definition-exists="true" ipc-concordant="H02P29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P29/02</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Providing protection against overload without automatic interruption of supply </text><reference><text>protection against faults of stepper motors <class-ref scheme="cpc">H02P8/36</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Informative note<br/>References listed below indicate places which could also be of interest when carrying out a search in respect of the subject matter covered by the preceding group:<br/>Emergency protective circuit arrangements with automatic interruption if supply, in general <class-ref scheme="cpc">H02H7/08</class-ref>;<br/>Emergency protective circuit arrangements for limiting excess current or voltage without disconnection in general <class-ref scheme="cpc">H02H7/08</class-ref></note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/024" definition-exists="false" ipc-concordant="H02P29/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P29/024</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/0241" definition-exists="false" ipc-concordant="H02P29/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P29/0241</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>the fault being an overvoltage</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/0243" definition-exists="false" ipc-concordant="H02P29/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P29/0243</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>the fault being a broken phase</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/025" definition-exists="false" ipc-concordant="H02P29/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P29/025</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>the fault being a power interruption</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/026" definition-exists="false" ipc-concordant="H02P29/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P29/026</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>the fault being a power fluctuation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/027" definition-exists="false" ipc-concordant="H02P29/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P29/027</classification-symbol><class-title date-revised="2016-02-01"><title-part><CPC-specific-text><text>the fault being an over-current</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/028" definition-exists="false" ipc-concordant="H02P29/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P29/028</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/032" definition-exists="false" ipc-concordant="H02P29/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H02P29/032</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Preventing damage to the motor, e.g. setting individual current limits for different drive conditions</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P29/04" definition-exists="false" ipc-concordant="H02P29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P29/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of a separate brake</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/045" definition-exists="false" ipc-concordant="H02P29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P29/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P29/10" definition-exists="false" ipc-concordant="H02P29/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/10</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>for preventing overspeed or under speed</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P29/20" definition-exists="false" ipc-concordant="H02P29/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/20</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>for controlling one motor used for different sequential operations</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P29/40" definition-exists="false" ipc-concordant="H02P29/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/40</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P29/50" definition-exists="true" ipc-concordant="H02P29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/50</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Reduction of harmonics</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02P29/60" definition-exists="true" ipc-concordant="H02P29/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/60</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling or determining the temperature of the motor or of the drive </text><reference><text><class-ref scheme="cpc">H02P29/02</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/62" definition-exists="false" ipc-concordant="H02P29/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/62</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>for raising the temperature of the motor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/64" definition-exists="false" ipc-concordant="H02P29/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/64</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling or determining the temperature of the winding</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/66" definition-exists="false" ipc-concordant="H02P29/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/66</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Controlling or determining the temperature of the rotor</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/662" definition-exists="true" ipc-concordant="H02P29/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/662</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>the rotor having permanent magnets </text><reference><text><class-ref scheme="cpc">H02P29/67</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/664" definition-exists="false" ipc-concordant="H02P29/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/664</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>the rotor having windings</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02P29/666" definition-exists="false" ipc-concordant="H02P29/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/666</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>by rotor current detection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/67" definition-exists="true" ipc-concordant="H02P29/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/67</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Controlling or determining the motor temperature by back electromotive force [back-EMF] evaluation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02P29/68" definition-exists="false" ipc-concordant="H02P29/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/68</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>based on the temperature of a drive component or a semiconductor component</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02P29/685" definition-exists="false" ipc-concordant="H02P29/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H02P29/685</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>compensating for Hall sensor temperature non-linearity</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02P31/00" definition-exists="false" ipc-concordant="H02P31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H02P31/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Arrangements for regulating or controlling electric motors not provided for in groups <class-ref scheme="cpc">H02P1/00</class-ref>&#160;-&#160;<class-ref scheme="cpc">H02P5/00</class-ref>, <class-ref scheme="cpc">H02P7/00</class-ref> or <class-ref scheme="cpc">H02P21/00</class-ref>&#160;-&#160;<class-ref scheme="cpc">H02P29/00</class-ref></text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="H02P101/00" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/00</classification-symbol><class-title><title-part><text>Indexing scheme associated with groups relating to the arrangements for controlling electric generators</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H02P101/00" definition-exists="false" ipc-concordant="H02P101/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/00</classification-symbol><class-title><title-part><text>Special adaptation of control arrangements for generators</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P101/10" definition-exists="false" ipc-concordant="H02P101/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/10</classification-symbol><class-title><title-part><text>for water-driven turbines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P101/15" definition-exists="false" ipc-concordant="H02P101/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/15</classification-symbol><class-title><title-part><text>for wind-driven turbines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P101/20" definition-exists="false" ipc-concordant="H02P101/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/20</classification-symbol><class-title><title-part><text>for steam-driven turbines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P101/25" definition-exists="false" ipc-concordant="H02P101/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/25</classification-symbol><class-title><title-part><text>for combustion engines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P101/30" definition-exists="false" ipc-concordant="H02P101/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/30</classification-symbol><class-title><title-part><text>for aircraft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P101/35" definition-exists="false" ipc-concordant="H02P101/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/35</classification-symbol><class-title><title-part><text>for ships</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P101/40" definition-exists="false" ipc-concordant="H02P101/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/40</classification-symbol><class-title><title-part><text>for railway vehicles</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P101/45" definition-exists="false" ipc-concordant="H02P101/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2101/45</classification-symbol><class-title><title-part><text>for motor vehicles, e.g. car alternators</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H02P103/00" definition-exists="false" ipc-concordant="H02P103/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2103/00</classification-symbol><class-title><title-part><text>Controlling arrangements characterised by the type of generator</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P103/10" definition-exists="false" ipc-concordant="H02P103/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2103/10</classification-symbol><class-title><title-part><text>of the asynchronous type</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P103/20" definition-exists="false" ipc-concordant="H02P103/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>H02P2103/20</classification-symbol><class-title><title-part><text>of the synchronous type</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="H02P201/00" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/00</classification-symbol>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H02P201/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to controlling arrangements characterised by the converter used</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P201/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>AC-AC converter stage controlled to provide a defined AC voltage</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P201/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>AC-DC converter stage controlled to provide a defined DC link voltage </text><reference><text>general aspects of plural converters in cascade <class-ref scheme="cpc">H02M</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P201/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Capacitive half bridge, i.e. resonant inverter having two capacitors and two switches</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P201/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>DC-DC step-up or step-down converter inserted between the power supply and the inverter supplying the motor, e.g. to control voltage source fluctuations, to vary the motor speed </text><reference><text>general aspects of plural converters in cascade <class-ref scheme="cpc">H02M</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P201/09" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Boost converter, i.e. DC-DC step up converter increasing the voltage between the supply and the inverter driving the motor </text><reference><text>general aspects of plural converters in cascade <class-ref scheme="cpc">H02M</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P201/11" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Buck converter, i.e. DC-DC step down converter decreasing the voltage between the supply and the inverter driving the motor </text><reference><text>general aspects of plural converters in cascade <class-ref scheme="cpc">H02M</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P201/13" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2201/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>DC-link of current link type, e.g. typically for thyristor bridges, having an inductor in series with rectifier</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P201/15" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-02-01" status="published"><classification-symbol>H02P2201/15</classification-symbol><class-title date-revised="2016-02-01"><title-part><text>Power factor Correction [PFC] circuit generating the DC link voltage for motor driving inverter </text><reference><text>motor power factor control <class-ref scheme="cpc">H02P23/26</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H02P203/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2203/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to controlling arrangements characterised by the means for detecting the position of the rotor</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P203/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2203/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Motor rotor position determination based on the detected or calculated phase inductance, e.g. for a Switched Reluctance Motor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P203/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2203/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determination of the rotor position, e.g. initial rotor position, during standstill or low speed operation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P203/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2203/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determination of the rotor position by using two different methods and/or motor models</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P203/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2203/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Motor variable determination based on the ON-resistance of a power switch, i.e. the voltage across the switch is measured during the ON state of the switch and used to determine the current in the motor and to calculate the speed</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P203/09" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2203/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Motor speed determination based on the current and/or voltage without using a tachogenerator or a physical encoder</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P203/11" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2203/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determination or estimation of the rotor position or other motor parameters based on the analysis of high frequency signals </text><reference><text>position detection of motors with electronic commutators in dependence of the position <class-ref scheme="cpc">H02P6/185</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H02P205/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2205/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to controlling arrangements characterised by the control loops</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P205/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2205/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Current loop, i.e. comparison of the motor current with a current reference</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P205/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2205/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Power loop, i.e. comparison of the motor power with a power reference</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P205/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2205/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Torque loop, i.e. comparison of the motor torque with a torque reference</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P205/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2205/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Speed loop, i.e. comparison of the motor speed with a speed reference</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H02P207/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2207/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to controlling arrangements characterised by the type of motor</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P207/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2207/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Asynchronous machines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P207/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2207/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Double rotor motors or generators, i.e. electromagnetic transmissions having double rotor with motor and generator functions, e.g. for electrical variable transmission</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P207/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2207/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Synchronous machines, e.g. with permanent magnets or DC excitation</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H02P207/055" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2207/055</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Surface mounted magnet motors</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P207/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2207/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Doubly fed machines receiving two supplies both on the stator only wherein the power supply is fed to different sets of stator windings or to rotor and stator windings</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H02P207/073" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H02P2207/073</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>wherein only one converter is used, the other windings being supplied without converter, e.g. doubly-fed induction machines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H02P207/076" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2207/076</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein both supplies are made via converters: especially doubly-fed induction machines</text></title-part><title-part><text>e.g. for starting</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H02P209/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P209/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Motors with neutral point connected to the power supply</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P209/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Motors with neutral point disassociated, i.e. the windings ends are not connected directly to a common point</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P209/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Polyphase motors supplied from a single-phase power supply or a DC power supply</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P209/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Trapezoidal waveform</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P209/09" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>PWM with fixed limited number of pulses per period</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H02P209/095" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/095</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One pulse per half period</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P209/11" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sinusoidal waveform</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H02P209/13" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02P2209/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Different type of waveforms depending on the mode of operation</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></class-scheme>