Power conversion device including an AC/DC converter and a DC/DC converter

A power conversion device comprising:

• an AC/DC converter for performing power factor correction control for a single-phase AC power supply and converting AC power from the single-phase AC power supply, to DC power;
• a DC/DC converter which is connected to a DC side of the AC/DC converter and performs voltage conversion of DC power;
• a DC capacitor connected between positive and negative DC buses between the AC/DC converter and the DC/DC converter;
• and
• a control circuit for performing output control for the AC/DC converter and the DC/DC converter, wherein
• the control circuit superimposes, onto a DC current command, an AC current command decided according to information of ripple voltage derived from the DC capacitor, having a minimum value at a zero cross phase of the single-phase AC power supply and having a maximum value at a peak phase thereof, to generate an output current command for the DC/DC converter, and performs the output control for the DC/DC converter, using the output current command.