FIELD: high-voltage half-wave switching electric drives. SUBSTANCE: electronic- switching motor control system uses an assembly of bootstrap diodes, capacitor at the input of the pulse self-sustained oscillator, additional transistor cut in the emitter circuit of the switching transistor, optronic transistor and a current control circuit. It prevents overvoltages across the collector gates switching the motor windings with simultaneous regeneration of winding self-inductance energy. EFFECT: enhanced reliability. 5 cl, 4 dwg
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