H02P

CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS

CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS

This subclass covers 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. H01F, H02K.

This subclass does not cover similar arrangements for the apparatus of the types classified in subclass H02N, which arrangements are covered by that subclass.

In this subclass, the following terms or expressions are used with the meanings indicated:

"control" 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;

"regulation" 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.

In this subclass, it is desirable to add the indexing codes of groups H02P2101/00 and H02P2103/00

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.

H02P1/00

Arrangements for starting electric motors or dynamo-electric converters starting of synchronous motors with electronic commutators except reluctance motors, H02P6/20, H02P6/22; starting dynamo-electric motors rotating step by step H02P8/04; vector control H02P21/00

Group H02P1/029 takes precedence over groups H02P1/26 - H02P1/54.

H02P1/02

Details

H02P1/021

Protection against "no voltage condition"

H02P1/022

Security devices, e.g. correct phase sequencing

H02P1/023

Protection against sparking of contacts or sticking together

H02P1/024

Protection against simultaneous starting by two starting devices

H02P1/025

Protection against starting if starting resistor is not at zero position

H02P1/026

Means for delayed starting

H02P1/027

Special design of starting resistor

H02P1/028

wherein the motor voltage is increased at low speed, to start or restart high inertia loads

H02P1/029

Restarting, e.g. after power failure

H02P1/04

Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter

H02P1/06

Manually-operated multi-position starters

H02P1/08

Manually-operated on/off switch controlling power-operated multi-position switch or impedances for starting a motor

H02P1/10

Manually-operated on/off switch controlling relays or contactors operating sequentially for starting a motor sequence determined by power-operated multi-position switch H02P1/08

H02P1/12

Switching devices centrifugally operated by the motor

H02P1/14

Pressure-sensitive resistors centrifugally operated by the motor

H02P1/16

for starting dynamo-electric motors or dynamo-electric converters

H02P1/163

for starting an individual reluctance motor

H02P1/166

Driving load with high inertia

H02P1/18

for starting an individual dc motor

H02P1/20

by progressive reduction of resistance in series with armature winding

H02P1/22

in either direction of rotation

H02P1/24

for starting an individual ac commutator motor starting of ac/dc commutator motors H02P1/18

H02P1/26

for starting an individual polyphase induction motor

H02P1/265

Means for starting or running a triphase motor on a single phase supply

H02P1/28

by progressive increase of voltage applied to primary circuit of motor

H02P1/30

by progressive increase of frequency of supply to primary circuit of motor

H02P1/32

by star-delta switching

H02P1/34

by progressive reduction of impedance in secondary circuit

H02P1/36

the impedance being a liquid resistance

H02P1/38

by pole-changing

H02P1/40

in either direction of rotation

H02P1/42

for starting an individual single-phase induction motor

H02P27/04 takes precedence

H02P1/423

by using means to limit the current in the main winding

H02P1/426

by using a specially adapted frequency converter

H02P1/44

by phase-splitting with a capacitor

H02P1/445

by using additional capacitors switched at start up

H02P1/46

for starting an individual synchronous motor

H02P27/04 takes precedence

H02P1/465

for starting an individual single-phase synchronous motor

H02P1/48

by pole-changing

H02P1/50

by changing over from asynchronous to synchronous operation H02P1/48 takes precedence

H02P1/52

by progressive increase of frequency of supply to motor

H02P1/54

for starting two or more dynamo-electric motors

H02P1/56

simultaneously

H02P1/58

sequentially

H02P3/00

Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters stopping of synchronous motors with electronic commutators except reluctance motors, H02P6/24; stopping dynamo-electric motors rotating step by step H02P8/24; vector control H02P21/00

H02P3/02

Details

H02P3/025

holding the rotor in a fixed position after deceleration

H02P3/04

Means for stopping or slowing by a separate brake, e.g. friction brake, eddy-current brake brakes F16D, H02K49/00

H02P3/06

for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter

H02P3/065

for stopping or slowing a reluctance motor

H02P3/08

for stopping or slowing a dc motor

H02P3/10

by reversal of supply connections

H02P3/12

by short-circuit or resistive braking

H02P3/14

by regenerative braking

H02P3/16

by combined electrical and mechanical braking

H02P3/18

for stopping or slowing an ac motor

H02P3/20

by reversal of phase sequence of connections to the motor

H02P3/22

by short-circuit or resistive braking

H02P3/24

by applying dc to the motor

H02P3/26

by combined electrical and mechanical braking

H02P4/00

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 vector control H02P21/00

H02P5/00

Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors H02P6/04, H02P8/40 take precedence

H02P5/46

for speed regulation of two or more dynamo-electric motors in relation to one another

H02P5/48

by comparing mechanical values representing the speeds

H02P5/485

using differential movement of the two motors, e.g. using differential gearboxes

H02P5/49

by intermittently closing or opening electrical contacts

H02P5/50

by comparing electrical values representing the speeds

H02P5/505

using equalising lines, e.g. rotor and stator lines of first and second motors

H02P5/51

Direct ratio control

H02P5/52

additionally providing control of relative angular displacement

H02P5/54

Speed and position comparison between the motors by mechanical means

H02P5/56

Speed and position comparison between the motors by electrical means

H02P5/60

controlling combinations of dc and ac dynamo-electric motors H02P5/46 takes precedence

H02P5/68

controlling two or more dc dynamo-electric motors H02P5/46, H02P5/60 take precedence

H02P5/685

electrically connected in series, i.e. carrying the same current

H02P5/69

mechanically coupled by gearing

H02P5/695

Differential gearing

H02P5/74

controlling two or more ac dynamo-electric motors H02P5/46, H02P5/60 take precedence

H02P5/747

mechanically coupled by gearing

H02P5/753

Differential gearing

H02P6/00

Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position

Electronic commutators therefor vector control H02P21/00

Group H02P6/26 takes precedence over groups H02P6/04–H02P6/24 and H02P6/28 – H02P6/34

H02P6/005

Arrangements for controlling doubly fed motors

H02P6/006

Controlling linear motors

H02P6/007

wherein the position is detected using the ripple of the current caused by the commutation

H02P6/04

Arrangements for controlling or regulating the speed or torque of more than one motor H02P6/10 takes precedence

H02P2006/045

Control of current

H02P6/06

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

H02P6/08

Arrangements for controlling the speed or torque of a single motor H02P6/10, H02P6/28 take precedence

H02P6/085

in a bridge configuration

H02P6/10

Arrangements for controlling torque ripple, e.g. providing reduced torque ripple

H02P6/12

Monitoring commutation

Providing indication of commutation failure

H02P6/14

Electronic commutators

H02P6/15

Controlling commutation time

H02P6/153

wherein the commutation is advanced from position signals phase in function of the speed

H02P6/157

wherein the commutation is function of electro-magnetic force [EMF]

H02P6/16

Circuit arrangements for detecting position

H02P6/17

and for generating speed information

H02P6/18

without separate position detecting elements

H02P6/181

using different methods depending on the speed

H02P6/182

using back-emf in windings

H02P6/183

using an injected high frequency signal

H02P6/185

using inductance sensing, e.g. pulse excitation

H02P6/186

using difference of inductance or reluctance between the phases

H02P6/187

using the star point voltage

H02P6/188

using the voltage difference between the windings H02P6/182 takes precedence

H02P6/20

Arrangements for starting H02P6/08 takes precedence

H02P6/21

Open loop start

H02P6/22

in a selected direction of rotation

H02P6/24

Arrangements for stopping

H02P6/26

Arrangements for controlling single phase motors

H02P6/28

Arrangements for controlling current H02P6/10 takes precedence

H02P6/30

Arrangements for controlling the direction of rotation H02P6/22 takes precedence

H02P6/32

Arrangements for controlling wound field motors, e.g. motors with exciter coils

H02P6/34

Modelling or simulation for control purposes

H02P7/00

Arrangements for regulating or controlling the speed or torque of electric DC motors

H02P7/0094

wherein the position is detected using the ripple of the current caused by the commutator

H02P7/02

the DC motors being of the linear type

H02P7/025

the DC motors being of the moving coil type, e.g. voice coil motors

H02P7/03

for controlling the direction of rotation of DC motors

H02P7/04

by means of a H-bridge circuit

H02P7/05

by means of electronic switching

H02P7/06

for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current

H02P7/063

using centrifugal devices, e.g. switch, resistor

H02P7/066

using a periodic interrupter, e.g. Tirrill regulator

H02P7/08

by manual control without auxiliary power

H02P7/10

of motor field only

H02P7/12

Switching field from series to shunt excitation or vice versa

H02P7/14

of voltage applied to the armature with or without control of field

Ward-Leonard

H02P7/18

by master control with auxiliary power

H02P7/20

using multi-position switch, e.g. drum, controlling motor circuit by means of relays H02P7/24, H02P7/30 take precedence

H02P7/22

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 H02P7/24, H02P7/30 take precedence

H02P7/24

using discharge tubes or semiconductor devices

H02P7/245

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/26

using discharge tubes

H02P7/265

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/28

using semiconductor devices

H02P7/2805

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/281

the DC motor being operated in four quadrants

Group H02P7/281 takes precedence over groups H02P7/282 – H02P7/298.

H02P7/2815

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/282

controlling field supply only

H02P7/2825

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/285

controlling armature supply only

H02P7/2855

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/288

using variable impedance

H02P7/2885

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/29

using pulse modulation

H02P7/291

with on-off control between two set points, e.g. controlling by hysteresis

H02P7/2913

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/292

using static converters, e.g. AC to DC

H02P7/293

using phase control H02P7/295 takes precedence

H02P7/295

of the kind having a thyristor or the like in series with the power supply and the motor

H02P7/298

controlling armature and field supply

H02P7/2985

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/30

using magnetic devices with controllable degree of saturation, i.e. transductors

H02P7/305

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/32

using armature-reaction-excited machines, e.g. metadyne, amplidyne, rototrol

H02P7/325

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P7/34

using Ward-Leonard arrangements

H02P7/343

in which both generator and motor fields are controlled

H02P7/347

in which only the generator field is controlled

H02P7/348

for changing between series and parallel connections of motors

H02P8/00

Arrangements for controlling dynamo-electric motors of the kind having motors rotating step by step vector control H02P21/00

H02P8/005

of linear motors

H02P8/02

specially adapted for single-phase or bi-pole stepper motors, e.g. watch-motors, clock-motors

Groups H02P8/005 and H02P8/02 take precedence over groups H02P8/04 - H02P8/42

H02P8/04

Arrangements for starting

H02P8/06

in selected direction of rotation

H02P8/08

Determining position before starting

H02P8/10

Shaping pulses for starting

Boosting current during starting

H02P8/12

Control or stabilisation of current

H02P8/14

Arrangements for controlling speed or speed and torque H02P8/12, H02P8/22 take precedence

H02P8/16

Reducing energy dissipated or supplied

H02P8/165

using two level supply voltage

H02P8/18

Shaping of pulses, e.g. to reduce torque ripple

H02P8/20

characterised by bidirectional operation

H02P8/22

Control of step size

Intermediate stepping, e.g. microstepping

H02P8/24

Arrangements for stopping H02P8/32 takes precedence

H02P8/26

Memorising final pulse when stopping

H02P8/28

Disconnecting power source when stopping

H02P8/30

Holding position when stopped

H02P8/32

Reducing overshoot or oscillation, e.g. damping

H02P8/34

Monitoring operation H02P8/36 takes precedence

H02P8/36

Protection against faults, e.g. against overheating, step-out

Indicating faults emergency protective arrangements with automatic interruption of supply H02H7/08

H02P8/38

the fault being step-out

H02P8/40

Special adaptations for controlling two or more stepping motors

H02P8/42

characterised by non-stepper motors being operated step by step

H02P9/00

Arrangements for controlling electric generators for the purpose of obtaining a desired output Ward-Leonard arrangements H02P7/34; vector control H02P21/00; feeding a network by two or more generators H02J; for charging batteries H02J7/14

H02P9/006

Means for protecting the generator by using control H02H7/06 takes precedence; control effected upon generator excitation circuit to reduce harmful effects of overloads or transients H02P9/10

H02P9/007

Control circuits for doubly fed generators

H02P9/008

wherein the generator is controlled by the requirements of the prime mover

H02P9/009

Circuit arrangements for detecting rotor position

H02P9/02

Details

H02P9/04

Control effected upon non-electric prime mover and dependent upon electric output value of the generator effecting control of the prime mover in general, see the relevant class for such prime mover

H02P9/06

Control effected upon clutch or other mechanical power transmission means and dependent upon electric output value of the generator effecting control of the power transmission means, see the relevant class for such means

H02P9/08

Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation

H02P9/10

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

H02P9/102

for limiting effects of transients

H02P9/105

for increasing the stability

H02P9/107

for limiting effects of overloads

H02P9/12

for demagnetising

for reducing effects of remanence

for preventing pole reversal

H02P9/123

for demagnetising; for reducing effects of remanence

H02P9/126

for preventing pole reversal

H02P9/14

by variation of field H02P9/08, H02P9/10 take precedence

H02P9/16

due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step

H02P9/18

the switching being caused by a servomotor, measuring instrument, or relay

H02P9/20

due to variation of continuously-variable ohmic resistance

H02P9/22

comprising carbon pile resistance

H02P9/24

due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator

H02P9/26

using discharge tubes or semiconductor devices H02P9/34 takes precedence

H02P9/28

using discharge tubes

H02P9/30

using semiconductor devices

H02P9/302

Brushless excitation

H02P9/305

controlling voltage H02P9/302 takes precedence

H02P9/307

more than one voltage output

H02P9/32

using magnetic devices with controllable degree of saturation H02P9/34 takes precedence

H02P9/34

using magnetic devices with controllable degree of saturation in combination with controlled discharge tube or controlled semiconductor device

H02P9/36

using armature-reaction-excited machines

H02P9/38

Self-excitation by current derived from rectification of both output voltage and output current of generator

H02P9/40

by variation of reluctance of magnetic circuit of generator

H02P9/42

to obtain desired frequency without varying speed of the generator

H02P9/44

Control of frequency and voltage in predetermined relation, e.g. constant ratio

H02P9/46

Control of asynchronous generator by variation of capacitor

H02P9/48

Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle H02P9/04 - H02P9/46 take precedence

H02P11/00

Arrangements for controlling dynamo-electric converters starting H02P1/00; stopping or slowing H02P3/00; vector control H02P21/00; feeding a network in conjunction with a generator or another converter H02J

H02P11/04

for controlling dynamo-electric converters having a dc output

H02P11/06

for controlling dynamo-electric converters having an ac output

H02P13/00

Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output regulation systems using transformers, reactors or choke coils G05F; transformers H01F; feeding a network in conjunction with a generator or a converter H02J; control or regulation of converters H02M

H02P13/06

by tap-changing

by rearranging interconnections of windings

H02P13/08

by sliding current collector along winding

H02P13/10

by moving core, coil winding, or shield, e.g. by induction regulator

H02P13/12

by varying magnetic bias

H02P15/00

Arrangements for controlling dynamo-electric brakes or clutches controlling speed of dynamo-electric motors by means of a separate brake H02P29/04, vector control H02P21/00

see provisionally also H02K49/00 and H02P29/0022

H02P15/02

Conjoint control of brakes and clutches

H02P17/00

Arrangements for controlling dynamo-electric gears vector control H02P21/00

H02P21/00

Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation

When classifying in this group, classification should also be made in group H02P25/00 when the method of control is characterised by the kind of motor being controlled.

When classifying in this group, classification should also be made in group H02P27/00 when the method of control is characterised by the kind of supply voltage of the motor being controlled.

H02P21/0003

Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control

H02P21/0007

using sliding mode control

H02P21/001

using fuzzy control

H02P21/0014

using neural networks

H02P21/0017

Model reference adaptation, e.g. MRAS or MRAC, useful for control or parameter estimation

H02P21/0021

using different modes of control depending on a parameter, e.g. the speed

H02P21/0025

implementing a off line learning phase to determine and store useful data for on-line control

H02P21/0085

specially adapted for high speeds, e.g. above nominal speed

H02P21/0089

using field weakening

H02P21/02

specially adapted for optimising the efficiency at low load

H02P21/04

specially adapted for very low speeds

H02P21/05

specially adapted for damping motor oscillations, e.g. for reducing hunting

H02P21/06

Rotor flux based control involving the use of rotor position or rotor speed sensors

H02P21/08

Indirect field-oriented control

Rotor flux feed-forward control

H02P21/09

Field phase angle calculation based on rotor voltage equation by adding slip frequency and speed proportional frequency

H02P21/10

Direct field-oriented control

Rotor flux feed-back control

H02P21/12

Stator flux based control involving the use of rotor position or rotor speed sensors

H02P21/13

Observer control, e.g. using Luenberger observers or Kalman filters

H02P21/14

Estimation or adaptation of machine parameters, e.g. flux, current or voltage

H02P21/141

Flux estimation

H02P21/143

Inertia or moment of inertia estimation

H02P21/16

Estimation of constants, e.g. the rotor time constant

H02P21/18

Estimation of position or speed

H02P21/20

Estimation of torque

H02P21/22

Current control, e.g. using a current control loop

H02P21/24

Vector control not involving the use of rotor position or rotor speed sensors

H02P21/26

Rotor flux based control

H02P21/28

Stator flux based control

H02P21/30

Direct torque control [DTC] or field acceleration method [FAM]

H02P21/32

Determining the initial rotor position H02P21/34 takes precedence

H02P21/34

Arrangements for starting

H02P21/36

Arrangements for braking or slowing

Four quadrant control

H02P21/50

Vector control arrangements or methods not otherwise provided for in H02P21/00- H02P21/36

H02P23/00

Arrangements or methods for the control of AC motors characterised by a control method other than vector control

When classifying in this group, subject matter also relating to groups H02P21/00, H02P25/00 or H02P27/00 is further classified in those groups whenever appropriate.

H02P23/0004

Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control

H02P23/0009

using sliding mode control

H02P23/0013

using fuzzy control

H02P23/0018

using neural networks

H02P23/0022

Model reference adaptation, e.g. MRAS or MRAC, useful for control or parameter estimation

H02P23/0027

using different modes of control depending on a parameter, e.g. the speed

H02P23/0031

implementing a off line learning phase to determine and store useful data for on-line control

H02P23/0077

Characterised by the use of a particular software algorithm

H02P23/0086

specially adapted for high speeds, e.g. above nominal speed

H02P23/009

using field weakening

H02P23/02

specially adapted for optimising the efficiency at low load

H02P23/03

specially adapted for very low speeds

H02P23/04

specially adapted for damping motor oscillations, e.g. for reducing hunting

H02P23/06

Controlling the motor in four quadrants

H02P23/07

Polyphase or monophase asynchronous induction motors

H02P23/08

Controlling based on slip frequency, e.g. adding slip frequency and speed proportional frequency

H02P23/10

Controlling by adding a dc current dc current braking H02P3/24

H02P23/12

Observer control, e.g. using Luenberger observers or Kalman filters

H02P23/14

Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage

H02P23/16

Controlling the angular speed of one shaft H02P23/18 takes precedence

H02P23/18

Controlling the angular speed together with angular position or phase

H02P23/183

of one shaft without controlling the prime mover

H02P23/186

of one shaft by controlling the prime mover

H02P23/20

Controlling the acceleration or deceleration

H02P23/22

Controlling the speed digitally using a reference oscillator, a speed proportional pulse rate feedback and a digital comparator

H02P23/24

Controlling the direction, e.g. clockwise or counterclockwise

H02P23/26

Power factor control [PFC]

H02P23/28

Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases

H02P23/30

Direct torque control [DTC] or field acceleration method [FAM]

H02P25/00

Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details

When classifying in this group, subject matter also relating to groups H02P21/00, H02P23/00 or H02P27/00 is further classified in those groups whenever appropriate.

H02P25/02

characterised by the kind of motor

H02P25/022

Synchronous motors H02P25/064 takes precedence

H02P25/024

controlled by supply frequency

H02P25/026

thereby detecting the rotor position

H02P25/028

with four quadrant control

H02P25/03

with brushless excitation

H02P25/032

Reciprocating, oscillating or vibrating motors

H02P25/034

Voice coil motors voice coil motors driven by DC power H02P7/025

H02P25/04

Single phase motors, e.g. capacitor motors

H02P25/06

Linear motors

H02P25/062

of the induction type

H02P25/064

of the synchronous type

H02P25/066

of the stepping type

H02P25/08

Reluctance motors

H02P25/0805

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P25/083

Arrangements for increasing the switching speed from one coil to the next one

H02P25/086

Commutation

H02P25/089

Sensorless control direct torque control H02P23/30

H02P25/092

Converters specially adapted for controlling reluctance motors

H02P25/0925

wherein the converter comprises only one switch per phase

H02P25/098

Arrangements for reducing torque ripple

H02P25/10

Commutator motors, e.g. repulsion motors

H02P25/102

Repulsion motors

H02P25/105

Four quadrant control

H02P25/107

Polyphase or monophase commutator motors

H02P25/12

with shiftable brushes

H02P25/14

Universal motors H02P25/12 takes precedence

H02P25/145

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value, speed feedback

H02P25/16

characterised by the circuit arrangement or by the kind of wiring

H02P25/18

with arrangements for switching the windings, e.g. with mechanical switches or relays

H02P25/182

whereby the speed is regulated by using centrifucal devices, e.g. switch, resistor

H02P25/184

wherein the motor speed is changed by switching from a delta to a star, e.g. wye, connection of its windings, or vice versa

H02P25/186

whereby the speed is regulated by using a periodic interrupter H02P25/30 takes precedence

H02P25/188

wherein the motor windings are switched from series to parallel or vice versa to control speed or torque

H02P25/20

for pole-changing

H02P25/22

Multiple windings

Windings for more than three phases

H02P25/24

Variable impedance in stator or rotor circuit

H02P25/26

with arrangements for controlling secondary impedance

H02P25/28

using magnetic devices with controllable degree of saturation, e.g. transductors

H02P25/30

the motor being controlled by a control effected upon an ac generator supplying it

H02P25/32

using discharge tubes

H02P25/325

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P27/00

Arrangements or methods for the control of AC motors characterised by the kind of supply voltage of two or more motors H02P5/00; of synchronous motors with electronic commutators H02P6/00; of DC motors H02P7/00; of stepping motors H02P8/00

When classifying in this group, subject matter also relating to groups H02P21/00, H02P23/00 or H02P25/00 is further classified in those groups whenever appropriate

H02P27/02

using supply voltage with constant frequency and variable amplitude

H02P27/024

using AC supply for only the rotor circuit or only the stator circuit

H02P27/026

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P27/04

using variable-frequency supply voltage, e.g. inverter or converter supply voltage

H02P27/045

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P27/047

V/F converter, wherein the voltage is controlled proportionally with the frequency

H02P27/048

using AC supply for only the rotor circuit or only the stator circuit

H02P27/05

using AC supply for both the rotor and the stator circuits, the frequency of supply to at least one circuit being variable

H02P27/06

using dc to ac converters or inverters H02P27/05 takes precedence

H02P27/08

with pulse width modulation

H02P27/085

wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency

H02P27/10

using bang-bang controllers

H02P27/12

pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control

H02P27/14

with three or more levels of voltage

H02P27/16

using ac to ac converters without intermediate conversion to dc H02P27/05 takes precedence

H02P27/18

varying the frequency by omitting half waves

H02P29/00

Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors arrangements for starting electric motors H02P1/00; arrangements for stopping or slowing electric motors H02P3/00; control of motors that can be connected to two or more different electric power supplies H02P4/00; regulating or controlling the speed or torque of two or more electric motors H02P5/00; vector control H02P21/00

H02P29/0016

Control of angular speed of one shaft without controlling the prime mover

H02P29/0022

Controlling a brake between the prime mover and the load

H02P29/0027

Controlling a clutch between the prime mover and the load

H02P29/02

Providing protection against overload without automatic interruption of supply protection against faults of stepper motors H02P8/36

Informative note
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:
Emergency protective circuit arrangements with automatic interruption if supply, in general H02H7/08;
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection in general H02H7/08

H02P29/024

Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load

H02P29/0241

the fault being an overvoltage

H02P29/0243

the fault being a broken phase

H02P29/025

the fault being a power interruption

H02P29/026

the fault being a power fluctuation

H02P29/027

the fault being an over-current

H02P29/028

the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault

H02P29/032

Preventing damage to the motor, e.g. setting individual current limits for different drive conditions

H02P29/04

by means of a separate brake

H02P29/045

whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

H02P29/10

for preventing overspeed or under speed

H02P29/20

for controlling one motor used for different sequential operations

H02P29/40

Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load

H02P29/50

Reduction of harmonics

H02P29/60

Controlling or determining the temperature of the motor or of the drive H02P29/02 takes precedence

H02P29/62

for raising the temperature of the motor

H02P29/64

Controlling or determining the temperature of the winding

H02P29/66

Controlling or determining the temperature of the rotor

H02P29/662

the rotor having permanent magnets H02P29/67 takes precedence

H02P29/664

the rotor having windings

H02P29/666

by rotor current detection

H02P29/67

Controlling or determining the motor temperature by back electromotive force [back-EMF] evaluation

H02P29/68

based on the temperature of a drive component or a semiconductor component

H02P29/685

compensating for Hall sensor temperature non-linearity

H02P31/00

Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00

H02P2101/00

Indexing scheme associated with groups relating to the arrangements for controlling electric generators

H02P2101/00

Special adaptation of control arrangements for generators

H02P2101/10

for water-driven turbines

H02P2101/15

for wind-driven turbines

H02P2101/20

for steam-driven turbines

H02P2101/25

for combustion engines

H02P2101/30

for aircraft

H02P2101/35

for ships

H02P2101/40

for railway vehicles

H02P2101/45

for motor vehicles, e.g. car alternators

H02P2103/00

Controlling arrangements characterised by the type of generator

H02P2103/10

of the asynchronous type

H02P2103/20

of the synchronous type

H02P2201/00

Indexing scheme relating to controlling arrangements characterised by the converter used

H02P2201/01

AC-AC converter stage controlled to provide a defined AC voltage

H02P2201/03

AC-DC converter stage controlled to provide a defined DC link voltage general aspects of plural converters in cascade H02M

H02P2201/05

Capacitive half bridge, i.e. resonant inverter having two capacitors and two switches

H02P2201/07

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 general aspects of plural converters in cascade H02M

H02P2201/09

Boost converter, i.e. DC-DC step up converter increasing the voltage between the supply and the inverter driving the motor general aspects of plural converters in cascade H02M

H02P2201/11

Buck converter, i.e. DC-DC step down converter decreasing the voltage between the supply and the inverter driving the motor general aspects of plural converters in cascade H02M

H02P2201/13

DC-link of current link type, e.g. typically for thyristor bridges, having an inductor in series with rectifier

H02P2201/15

Power factor Correction [PFC] circuit generating the DC link voltage for motor driving inverter motor power factor control H02P23/26

H02P2203/00

Indexing scheme relating to controlling arrangements characterised by the means for detecting the position of the rotor

H02P2203/01

Motor rotor position determination based on the detected or calculated phase inductance, e.g. for a Switched Reluctance Motor

H02P2203/03

Determination of the rotor position, e.g. initial rotor position, during standstill or low speed operation

H02P2203/05

Determination of the rotor position by using two different methods and/or motor models

H02P2203/07

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

H02P2203/09

Motor speed determination based on the current and/or voltage without using a tachogenerator or a physical encoder

H02P2203/11

Determination or estimation of the rotor position or other motor parameters based on the analysis of high frequency signals position detection of motors with electronic commutators in dependence of the position H02P6/185

H02P2205/00

Indexing scheme relating to controlling arrangements characterised by the control loops

H02P2205/01

Current loop, i.e. comparison of the motor current with a current reference

H02P2205/03

Power loop, i.e. comparison of the motor power with a power reference

H02P2205/05

Torque loop, i.e. comparison of the motor torque with a torque reference

H02P2205/07

Speed loop, i.e. comparison of the motor speed with a speed reference

H02P2207/00

Indexing scheme relating to controlling arrangements characterised by the type of motor

H02P2207/01

Asynchronous machines

H02P2207/03

Double rotor motors or generators, i.e. electromagnetic transmissions having double rotor with motor and generator functions, e.g. for electrical variable transmission

H02P2207/05

Synchronous machines, e.g. with permanent magnets or DC excitation

H02P2207/055

Surface mounted magnet motors

H02P2207/07

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

H02P2207/073

wherein only one converter is used, the other windings being supplied without converter, e.g. doubly-fed induction machines

H02P2207/076

wherein both supplies are made via converters: especially doubly-fed induction machines

e.g. for starting

H02P2209/00

Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current

H02P2209/01

Motors with neutral point connected to the power supply

H02P2209/03

Motors with neutral point disassociated, i.e. the windings ends are not connected directly to a common point

H02P2209/05

Polyphase motors supplied from a single-phase power supply or a DC power supply

H02P2209/07

Trapezoidal waveform

H02P2209/09

PWM with fixed limited number of pulses per period

H02P2209/095

One pulse per half period

H02P2209/11

Sinusoidal waveform

H02P2209/13

Different type of waveforms depending on the mode of operation