전환시간 제어를 통한 BLDC전동기의 토크리플 저감 방법

This paper present a method of current control for torque ripple reduction in brushless de motor which have a trapezoid back EMF. In such drives the current ripples are generated by motor inductance in stator windings and the back EMF. The ripples suppression techniques that are practically effective in high speed as well as in low speed regions are rarely found. The proposed method here is based on a strategy that the commutation intervals of the incoming ang the outgoing phases can be equalized by a proper PWM control.