The different influences of four PWM modes on the commutation torque ripples in sensorless brushless DC motors control system

This paper introduces four PWM modes used in sensorless brushless DC motor control systems, and analyzes their different influences on the commutation torque ripple in detail. The authors then select the best PWM mode in four given types to reduce commutation torque ripple of BLDC motors. Simulation and experimental results prove that the selection is both correct and practical.

[1]  Kenichi Iizuka,et al.  Microcomputer Control for Sensorless Brushless Motor , 1985, IEEE Transactions on Industry Applications.

[2]  Pingping Zhu,et al.  A new method to minimize the commutation torque ripple in trapezoidal BLDC motor with sensorless drive , 2000, Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435).