Patent ID: 9543823
Date: 2017-01-10
CPC Classifications: H02M,Y02B

Claim:
1. A power conversion apparatus comprising: a transformer that includes a primary winding and a secondary winding, the secondary winding being magnetically coupled with the primary winding; an inverter circuit that converts a direct current voltage supplied from a direct current power supply into an alternating current voltage and that supplies the alternating current voltage to the primary winding; a connector that is electrically connected to at least one of a commercial power system and a load; a switching circuit unit that includes a switching device connected to the secondary winding and the connector; an inductor inserted between the secondary winding and the switching device; and an auxiliary switching device inserted between the secondary winding and the switching device, in parallel to the inductor, wherein an amplitude of at least one of an output voltage and an output current of the connector is controlled by a control of turning on or off the switching device, the auxiliary switching device is in an off state, in a power supply mode in which the output voltage and the output current of the connector have the same polarity, and the auxiliary switching device is in an on state, in a power regeneration mode in which the output voltage and the output current of the connector have different polarities.