一种用于无刷直流电机回馈制动的PWM调制方式  

A PWM Scheme for Regenerative Braking of Brushless DC Motor

作　　者：边春元[1] 段鹏飞 肖鸿权 李晓霞 张争强 BIAN Chunyuan;DUAN Pengfei;XIAO Hongquan;LI Xiaoxia;ZHANG Zhenqiang(College of Information Science and Engineering,Northeastern University,Shenyang 110004,Liaoning Province,China;CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd.,Qingdao 266000,Shandong Province,China;Puyang Power Supply Company,State Grid Henan Electric Power Company,Puyang 457000,Henan Province,China)

机构地区：[1]东北大学信息科学与工程学院,辽宁省沈阳市110004 [2]中车青岛四方车辆研究所有限公司,山东省青岛市266000 [3]国网河南省电力公司濮阳供电公司,河南省濮阳市457000

出　　处：《中国电机工程学报》2019年第17期5247-5256,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(61773006)~~

摘　　要：在能量回馈制动原理的基础上,分别指出无刷直流电机(brushless DC Motor,BLDCM)回馈制动时半桥和全桥脉宽调制(Pulse-Width Modulation,PWM)的优缺点,并在此基础上详细分析了BLDCM的半桥PWM回馈制动原理。针对现有的半桥PWM会在BLDCM回馈制动中引起非导通相续流,从而影响电机运行特性的问题,通过原理分析及数学推导,提出一种PWM-OFF-PWM调制方式,采用该调制方法可消除非导通相续流电流,改善电流波形,减小电磁转矩脉动,在制动过程中获得更大更稳定的制动转矩,进而实现高效回馈制动。仿真和试验分析表明该方法具有比传统半桥PWM调制更优良的特性。Based on regenerative braking principle, the paper indicated the advantages and disadvantages of half bridge pulse width modulation(PWM) and whole bridge PWM of brushless DC Motor(BLDCM) respectively, and presented a detailed analytical study of half bridge PWM of BLDCM This half bridge PWM method would cause diode freewheeling of inactive phase when motor operated in braking mode, thus affect operation characteristics of the motor. Through theoretical and mathematical analysis, a new PWM approach called PWM-OFF-PWM was proposed,which could eliminate the diode freewheeling of the inactive phase, improve the current waveform, decrease the torque ripple, get larger and stabler braking torque, and realize efficient regenerative braking. Simulation and experimental results were provided to demonstrate the validity of the proposed method.

关 键 词：无刷直流电机 回馈制动 PWM-OFF-PWM 非导通相续流 转矩脉动 

分 类 号：TM33[电气工程—电机]