POWER CONVERSION CIRCUIT AND AIR CONDITIONER

Abrégé

In order to suppress power loss at a time of conversion of AC voltage to DC voltage, the present invention is provided with: a plurality of main circuit switching elements (QD1-QD4) for converting AC power supplied from an AC system (162) to DC power and supplying the DC power to a load device (164); a reactor (174) connected between the main circuit switching elements (QD1-QD4) and the AC system (162); a plurality of reflux diodes (DD1-DD4) that are connected in reverse parallel respectively to the plurality of main circuit switching elements (QD1-QD4); reverse voltage application circuits (71-74) that are each connected to at least one of the reflux diodes (DD1-DD4), and that apply reverse voltage lower than DC voltage (VE) to be outputted to the load device (164), to the corresponding reflux diodes (DD1-DD4) when the corresponding reflux diodes (DD1-DD4) are cut off; and a control unit (180) that controls the reverse voltage application circuits (71-74).

Classes IPC  ?

• H02M 7/219 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
• H02M 7/12 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 7/21 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal