FAULT DIAGNOSING METHOD AND APPARATUS OF POWER ELECTRIC SYSTEM FOR VEHICLE

摘要

A fault diagnosis method of a power conversion system for a vehicle according to the present invention includes driving an inverter so that an output voltage command for fault detection is output; Measuring a current input to each phase of the motor connected to the inverter; Measuring the voltage of the neutral end of the motor; And determining whether the cable connecting the inverter and the motor and the relay connected to the neutral terminal of the motor fail based on the current input to each phase of the measured motor and the voltage of the neutral terminal. have.