POWER CONVERSION DEVICE AND POWER CONVERSION DEVICE CONTROL METHOD

摘要

The present invention addresses the problems of the increase of leakage current and noise failure induced in a peripheral device, which are attributable to a steep dV/dt because when a power conversion device is constructed using a wide-bandgap semiconductor device, the turn-on speed and turn-off speed are extremely fast. A power conversion device comprises: a converter for converting an AC voltage to a DC voltage; a DC intermediate circuit for smoothing the DC voltage converted by the converter; an inverter for converting the DC voltage smoothed by the DC intermediate circuit to an AC voltage; a gate drive circuit for driving semiconductor switching elements in the inverter; a current detector for detecting current flowing through the power conversion device; and a control circuit for detecting each current component value from the current detected by the current detector and for, based on the detected each current component value or the power factor obtained from the each current component value, changing the gate resistance value of the gate drive circuit.