METHOD AND DEVICE FOR CONTROLLING POSITION SENSORLESS MOTOR

摘要

A method and device for controlling a position sensor-less motor provided with a position sensor-less operation and a synchronous operation; wherein, when in a position sensor-less operation, a rotation position of a rotor is detected based on a counter-electromotive force generated in a stator coil which is then excited in synchronization with the detected rotation position of the rotor to rotate the rotor, and a deviation between a target position and the current position is determined from a target rotation position by a position instruction signal and the detected rotation position to perform a position sensor-less closed loop drive based on the determined deviation; and when in a synchronous operation, the stator coil of the motor is excited in synchronization with a position instruction signal to rotate the rotor.