Power conversion device

A power conversion device comprising:

• a power conversion unit including a switching element having a gate and configured to generate alternating current (AC) power from direct current (DC) power supplied to a provided DC input terminal;
• a first capacitor provided on a DC input side of the power conversion unit;
• a gate circuit including a drive circuit configured to output a gate drive signal to be supplied to the gate of the switching element and a second capacitor configured to smooth a power supply voltage of power to be supplied to the drive circuit;
• a bypass circuit configured to cause the second capacitor to be charged with a part of power stored in the first capacitor at the time of power supply loss of a control system circuit and enable the gate drive signal to be maintained in a negative bias by power stored in the second capacitor;
• and
• a discharging circuit configured to cause the first capacitor to be discharged with the power stored in the first capacitor in a state in which the gate drive signal is maintained in the negative bias by the power stored in the second capacitor.