Starting circuit for single-phase ac motor

Details Starting circuit for single-phase ac motor Starting circuit for single-phase ac motor

H - Electricity

02

P

H02P 1/42 (2006.01)

Patent

CA 2700016

A starting circuit for a single-phase AC motor, consisting at least of a rectifying and voltage-stabilizing circuit, a control circuit with a zero-cross detecting circuit and a counter, and a bidirectional thyristor. The bidirectional thyristor is serially connected to a starting winding and a starting capacitor, the bidirectional thyristor, the starting winding and the starting capacitor are connected a utility power AC input. The input end of the rectifying and voltage-stabilizing circuit is connected to the utility power AC input. The output end of the rectifying and voltage-stabilizing circuit supplies power to the control circuit. The input end of the zero-cross detecting circuit is connected to the utility power AC input. The output end of the zero-cross detecting circuit is connected to the input end of the counter. The zero-cross detecting circuit detects zero crossing points of the utility power AC input and inputs the zero crossing points to the counter.

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