Torque Ripple and Switching Power Loss Minimization with Constant Band Hysteresis Current Controller for BLDC Motor

摘要

In this paper, the hysteresis current controller for the brushless DC (BLDC) motor is presented to minimize the torque ripple by adopting Constant band hysteresis current controller during the commutation period only. However, constant band hysteresis current controller has problems caused by variable switching frequency. In spite of the problems, the constant band hysteresis current controller works well to reduce commutation torque ripple as well as switching power loss for BLDC motor drive because the switching power loss and the amount of commutation torque ripple can be controlled by the slope of the reference phase current and hysteresis bandwidth respectively. The detailed proposed constant band hysteresis current control technique is elucidated and the performance is verified via Matlab/Simulink simulation.