APPARATUS AND METHOD FOR ROTOR POSITION SENSOR FAULT DETECTION OF PERMANENT MAGNET SYNCHRONOUS MOTOR

摘要

The present invention relates to an apparatus and a method for detecting malfunctions of a rotor position sensor of a permanent magnet synchronous motor, and comprises: a position estimation unit for estimating a position of a motor by receiving voltage, current, and speed information of the motor; an actual position detection unit for detecting an actual position of the motor from a position sensor; a residual calculation unit for calculating residual from a difference between the estimation value and the actual position value; an adaptive threshold value calculation unit for calculating an adaptive threshold value according to a driving condition of the motor; and a malfunction determination unit for determining the malfunction of the motor by comparing the residual with the adaptive threshold value. The present invention can minimize error detection with distortion or modeling error by determining the malfunctions by the size of the residual value by applying the adaptive threshold value to the rotor position sensor of PMSM.