FIELD: electricity.
SUBSTANCE: device comprises a three-phase rectifying bridge, polar outputs of which, via transistors operating in a width-pulse modulation mode, are connected to an anchor winding of a DC motor, which with its other end is connected to a zero wire of supply voltage. Points of grid connection to a three-phase rectifying bridge are also connected to a zero wire via RC-circuits.
EFFECT: reduced voltage on keys and switching overvoltages arising in process of operation, besides, reverse mode implementation is provided.
2 dwg
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