Circuit and method for driving SPIM

A circuit for driving a single phase induction motor (SPIM), comprising a driver and an alternating-current unit;

• wherein the SPIM comprises a first winding configured as a main winding and a second winding configured as an auxiliary winding, driver comprises a rectifying unit, a direct-current bus, a first inverter unit, a second inverter unit and a first switch, and
• the alternating-current unit comprises an input alternating-current power, a second switch and a capacitor;
• wherein the input alternating-current power is connected to an input terminal of the rectifying unit, the rectifying unit is connected to the direct-current bus, and the direct-current bus is respectively connected to the first inverter unit and the second inverter unit;
• wherein the second winding is directly connected to the second inverter unit;
• wherein the first switch is disposed between the first winding and the first inverter unit;
• and
• wherein the second switch is disposed between the first winding and the input alternating-current power, and the capacitor is disposed between the first winding and the second switch.