抑制BLDCM换相转矩脉动的超前换相控制策略  

Advance commutation control method to suppress commutation torque ripple of brushless DC motors

作　　者：王大方[1] 朱洪彪 金毅[2] 于知杉 王明玉 WANG Da-fang;ZHU Hong-biao;JIN Yi;YU Zhi-shan;WANG Ming-yu(School of Automotive Engineering in Harbin Institute of Technology,Harbin Institute of Technology,Weihai 264209,China;Academy of Armored Forces Engineering,Beijing 100072,China)

机构地区：[1]哈尔滨工业大学汽车工程学院,山东威海264209 [2]装甲兵工程学院,北京100072

出　　处：《电机与控制学报》2018年第10期77-86,共10页Electric Machines and Control

基　　金：国家自然科学基金(51305457);国家国际科技合作专项(2014DFB70120);中央高校基本科研业务费专项资金资助(HIT.NSRIF.201705);山东省科技发展计划(2014GGX105002);航天科学技术基金(2017-HT-HG-36)

摘　　要：为了抑制无刷直流电机的换相转矩脉动,该论文从引起换相转矩脉动的主要原因——电流滞后入手,提出了一种新颖的超前换相的电机控制策略。该策略是通过让电机提前一段时间进入换相状态并且在换相过程对三相电压同时进行PWM调制来实现的。根据所提出的换相策略详细分析了换相过程中的不同阶段的电流流向,理论上推导了电机提前换相时间的解析式。通过实验给出了在不同转速和负载下运用所提方法进行换相的电流波形,将其与传统的换相方法比较,分析两者电流在换相期间的波动值。实验结果表明传统换相方法的电流波动值远远高于该论文提出的方法的电流波动值,验证了这种方法在抑制换相转矩脉动上的有效性。An advance commutation control method is presented to suppress commutation torque ripple of brushless direct control motors(BLDCM).This method is based on current lag which is the main reason of commutation torque ripple.This method impelled the motor to commutate for a period of time in advance to improve the current lag.Meanwhile,it modulated three-phase cooperatively to eliminate difference between slew rates of switching-in phase and switching-out phase.The directions of the current in different internals during commutation were analysed in detail and the analytic expression of the time in advance was derived with the method.The current waveform was given under different load torque and speeds in the experiments.The current fluctuation was analysed by comparing the waveforms of the proposed method and the conventional method.The results show that the current fluctuation of the conventional method is far higher than that of the proposed method.The results prove the validity of the proposed method in suppressing commutation torque ripple.

关 键 词：无刷直流电机 换相转矩脉动 超前换相 pulse-width MODULATION 电流滞后 

分 类 号：TM351[电气工程—电机]