(0)H02P:3/3:

(0)H02P:3/3:

IPC6

SECTION H - ELECTRICITY

CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR...

H02P

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H02P008/00 - H02P019/02

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Arrangements for controlling dynamo-electric motors rotating step by step [2,6]

specially adapted for single-phase or bi-pole stepper motors, e.g. watch-motors, clock-motors [6]

Arrangements for starting [6]

in selected direction of rotation [6]

Determining position before starting [6]

Shaping pulses for starting; Boosting current during starting [6]

Control or stabilisation of current [6]

Arrangements for controlling speed or speed and torque (H 02 P 8/12, H 02 P 8/22 take precedence) [6]

Reducing energy dissipated or supplied [6]

Shaping of pulses, e.g. to reduce torque ripple [6]

characterised by bidirectional operation [6]

Control of step size; Intermediate stepping, e.g. micro-stepping [6]

Arrangements for stopping (H 02 P 8/32 take precedence) [6]

Memorising final pulse when stopping [6]

Disconnecting power source when stopping [6]

Holding position when stopped [6]

Reducing overshoot or oscillation, e.g. damping [6]

Monitoring operation (H 02 P 8/36 takes precedence) [6]

Protection against faults, e.g. against overheating, step-out; Indicating faults (emergency protective arrangements with automatic interruption of supply H 02 H 7/08) [6]

the fault being step-out [6]

Special adaptations for controlling two or more stepping motors [6]

characterised by non-stepper motors being operated step by step [6]

Arrangements for controlling electric generators for the purpose of obtaining a desired output (Ward-Leonard arrangements H 02 P 7/34; feeding a network by two or more generators H 02 J; for charging batteries H 02 J 7/14)

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) [2]

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) [2]

Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation [2]

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 [2]

for demagnetising; for reducing effects of remanence; for preventing pole reversal [2]

by variation of field (H 02 P 9/08 , H 02 P 9/10 take precedence) [2]

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

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

due to variation of continuously-variable ohmic resistance

comprising carbon pile resistance

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

using discharge tubes or semiconductor devices (H 02 P 9/34 takes precedence) [2]

using discharge tubes

using semiconductor devices

using magnetic devices with controllable degree of saturation (H 02 P 9/34 takes precedence) [2]

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

using armature-reaction-excited machines

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

by variation of reluctance of magnetic circuit of generator

to obtain desired frequency without varying speed of the generator

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

Control of asynchronous generator by variation of capacitor

Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle (H 02 P 9/04 to H 02 P 9/46 take precedence) [3]

Arrangements for controlling dynamo-electric converters (starting H 02 P 1/00; stopping or slowing H 02 P 3/00; feeding a network in conjunction with a generator or another converter H 02 J) [4]

for controlling dynamo-electric converters having a dc output

for controlling dynamo-electric converters having an ac output

Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output (regulation systems using transformers, reactors or choke coils G 05 F; transformers H 01 F; feeding a network in conjunction with a generator or a converter H 02 J; control or regulation of converters H 02 M) [4]

by tap-changing; by rearranging interconnections of windings

by sliding current collector along winding

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

by varying magnetic bias

Arrangements for controlling dynamo-electric brakes or clutches (controlling speed of dynamo-electric motors by means of a separate brake H 02 P 5/00, H 02 P 7/00)

Conjoint control of brakes and clutches [3]

Arrangements for controlling dynamo-electric gears [3]

Arrangements according to more than one of groups H 02 P 1/00, H 02 P 3/00, H 02 P 5/00 or H 02 P 7/00 [5]

Providing protection against overload without automatic interruption of supply (emergency protective circuit arrangements with automatic interruption of supply H 02 H 7/08, without disconnection, in general H 02 H 9/02) [6]

Arrangements for control or regulation of electric motors by control of field orientation; Vector control [6]

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