MOTOR DRIVER SYSTEM AND CONTROLLING METHOD FOR THE SAME

摘要

A motor driver system and controlling method for the same is provided to prevent a current angel from being increased more than necessary when the motor is operated in low field magnet. In a motor driver system and controlling method for the same, an inverter(20) supplies three phase voltage to the motor and drives the motor. An inverter driving unit(200) generates a commanded voltage and output it to the inverter to follow the speed of the motor. The inverter controls an instruction angle of dequeue axis to be out of a set value when the motor is driven at weakling field domain. The inverter drive comprises a Q-axis current controller(220), a Q-axis volume control IC(210), and a D-axis volume control IC(230).