Patent ID: 9698699
Date: 2017-07-04
CPC Classifications: H02J,H02M,Y02B

Claim:
1. A direct AC power converter comprising: a DC link having a first power supply line and a second power supply line, an electric potential lower than an electric potential of said first power supply line being applied to said second power supply line; a first rectifying circuit having a plurality of input terminals that input an AC voltage and a pair of output terminals, each of which is connected to said DC link; an inverter that converts a voltage applied to said DC link into another AC voltage; a boost chopper having a capacitor at an output stage; and a switch that switches discharge and non-discharge from said capacitor to said DC link, wherein in said boost chopper, charge into said capacitor is performed at least at a first period being a part of a period during which a discharge duty as a time ratio of continuity of said switch is larger than 0.