H ELECTRICITY
H02 GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
8/00 Arrangements for controlling dynamo-electric motors rotating step by step
H02P8/32 Reducing overshoot or oscillation, e.g. damping