Torque Ripple Minimization in BLDC Drive Using PWM_ON_PWM Scheme

Abstract

In this paper a detailed analysis on torque ripples of brushless dc drives in both commutation and conduction region is given. A new control strategy for the elimination of torque ripples in BLDC motor by employing PWM_ON _PWM scheme has been introduced. PWM_ON_PWM strategy is mainly applied to compensate the commutation torque ripples during the commutation period caused by commutation current and it cannot entirely remove the torque ripples that are resulted from current introducing at the turn off phase. The duty cycle of PWM is regulated for achieving closed loop operation and simulation results are used for revealing circuit validation.