| 摘要 |
A power conversion device includes a switching circuit that converts a DC power into an AC power, a current detector that detects a current flowing from the switching circuit to an AC motor, a coordinate converter that converts a current detected by the current detector into a current, which rotates at an arbitrary speed, on coordinates, a phase calculator that calculates a current phase on rotation coordinates from a current on rotation coordinates output from the coordinate converter, and a fault phase determination unit that determines a fault phase based on a current phase on rotation coordinates output from the phase calculator. |
