by comparing mechanical values representing the speeds

Full Title

Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors > for speed regulation of two or more dynamo-electric motors in relation to one another > by comparing mechanical values representing the speeds

Classification Context

Section:

ELECTRICITY

Class:

GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER

Subclass:

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

Child Classifications

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• H02P 5/485 using differential movement of the two motors, e.g. using differential gearboxes
• H02P 5/49 by intermittently closing or opening electrical contacts