DEVICE FOR CONTROL OF SYNCHRONOUS ELECTRIC MOTOR Russian patent published in 1994 - IPC

FIELD: electric technique, low-speed drives. SUBSTANCE: device for control of a synchronous electric motor has active voltage divider 13 composed of resistors 16, 17 and complementary transistor pair. Bases of transistors 14, 15 of this pair are connected to a common point of resistors 16, 17, collectors are combined with free terminals of resistors 16, 17 and buses of a DC voltage source. The combined emitters of transistors 14, 15 are connected to a common point of different circuits of the synchronous electric motor loaded with current regulators 1, 2, 3. EFFECT: enhanced reliability. 2 dwg