POWER CONVERSION DEVICE

This power conversion device is provided with: a multi-phase inverter circuit comprising a plurality of switching elements; a current sensor that detects a current of the inverter circuit and outputs a detected current value; a terminal voltage detection unit that detects a terminal voltage of a load connected to the inverter circuit and outputs a detected voltage value; a switching element driving circuit that controls a plurality of switching elements of the inverter circuit in accordance with the commanded switching mode; a fault detection unit for detecting a fault of the inverter circuit or the current sensor; and a failure determination unit that, after the failure detection unit has detected a failure, switches a switching mode for commanding the switching element drive circuit in accordance with the type of failure that can be detected by the failure detection unit, and determines the failure of the switching element drive circuit in accordance with the current value detected by the current sensor or