

H02P7/24- Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices.H02P7/18- Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power.H02P7/06- Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current.H02P7/00- Arrangements for regulating or controlling the speed or torque of electric DC motors.H02P6/08- Arrangements for controlling the speed or torque of a single motor.H02P6/00- Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position Electronic commutators therefor.

H02P- CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS.

