A Study on the Current Control Method for Torque Ripple Reduction of Brushless DC Motor

브러시리스 직류 전동기의 토크 맥동 저감을 위한 전류 제어 방식에 관한 연구

The brushless DC motor with trapezoidal back emfs has torque ripple due to phase commutation. The torque ripple generates noise and vibration and cause errors in position control so this makes the brushless DC motor less suitable for high performance servo applications. In this paper, we propose a new current control method to reduce the torque ripple due to commutation, when the unipolar PWM method is applied for the phase current control of brushless DC motor.