FIELD: adjustable ac drives with even number of stator phases m. SUBSTANCE: method enable controlling electric drive that has m-phase ac motor and 2m-thyristor switch and is distinguished by new sequence of operations. Proposed device implementing this method has thyristor switch, motor, synchronizing transformer, variable-ratio counter, and logic element. EFFECT: provision for motor operation through thyristor switch from single-phase supply mains and improved basic performance characteristics of drive. 2 cl, 6 dwg
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