THYRISTOR ELECTRIC DRIVE Russian patent published in 1994 - IPC

FIELD: electrical engineering. SUBSTANCE: invention refers to two-phase synchronous motors. Electric drive is supplemented with additional pairs of diodes 27, 28; 33, 34; 29, 30; 25, 26 property connected to diodes of main pairs 35, 36; 37, 38; 39, 40; 31, 32 and 23, 24 coupled to sections 2, 3, 4, 5 of armatures winding of synchronous motor. Supplementary transistor key 43 and resistor 41 inserted into base circuit of motor are placed into circuit of bridge formed with diodes 23, 24, 27, 31 and 35, 36 of one cell of commutator. Similar key 44 and resistor 42 are included into other commutation cell. Specified elements form brake circuit when motor is stopped which leads to fast brake. EFFECT: reduced time of braking of motor. 3 dwg