非换相期间无刷直流电机转矩脉动分析与抑制  

Analysis and Suppression of Torque Ripple During Non-commutation of Brushless DC Motor

作　　者：李怀兵[1] 丑武胜[1] 冯震[1] 

机构地区：[1]北京航空航天大学机器人研究所,北京100191

出　　处：《微电机》2011年第4期1-5,共5页Micromotors

基　　金：国家"863"计划项目-煤矿井下搜索机器人研制(2007AA041501)

摘　　要：无刷直流电机的转矩脉动是影响其性能的重要因素。该文针对非换相期间的转矩脉动进行了分析,重点研究了PWM_ON调制方式时的转矩脉动。PWM信号为"OFF"时续流引起的转矩脉动占主要部分,非导通相续流在一定程度上可以补偿PWM关断时造成的转矩脉动。同时,提出使用滞环电流控制方法,采用该方法可以抑制非换相期间转矩脉动。通过仿真分析和实验验证了该方法和传统方法的差异,证明了该方法在非换相期间抑制转矩脉动的有效性。Torque ripple is an important factor affecting the performance of Brushless DC motor（BLDCM）.In this paper,the non-commutation torque ripple was analyzed,focusing on the torque ripple caused by PWM_ON modulation.The main part of the torque ripple was caused by the PWM_OFF,and the diode freewheeling of inactive phase can compensate the torque ripple to some extent.Meanwhile,hysteresis current control was proposed to suppress the non-commutation torque ripple.The simulation and experiment show the difference between the method and the traditional method,and prove the validity of the method suppressing the torque ripple during non-commutation.

关 键 词：无刷直流电机 非换相转矩脉动 PWM_ON调制 滞环电流控制 续流 

分 类 号：TM301.3[电气工程—电机] TM361