BLDC控制系统中PWM调制方式分析与比较  

Analysis and Comparison of PWM Modulation in Brushless DC(BLDC) Motor Control System

作　　者：史召峰[1] 孙承峰[2] 

机构地区：[1]安徽工业经济职业技术学院机电工程系,合肥230051 [2]苏州大学机电工程学院,江苏苏州215021

出　　处：《西安文理学院学报（自然科学版）》2016年第1期36-40,共5页Journal of Xi’an University(Natural Science Edition)

基　　金：安徽省省级教学研究项目(2014jyxm559)

摘　　要：介绍了无刷直流电机控制系统中的5种PWM调制方式,并从开关损耗、调制方式的极性和对换向转矩脉动的影响这三个角度来分析和比较了这几种PWM调制方式的优劣.通过理论推导,证明当控制系统采用PWM-ON调制方式,六只开关管的开关损耗得到了均匀的分配,并且直流无刷电机在换向过程中的转矩脉动最小.最后通过实验验证了结论的正确性.In this paper, five PWM modes used in the brushless DC motor control systems were introduced. Their advantages and disadvantages were analyzed and compared from three aspects such as switch loss, the polarity of modulation mode and the influence on the commutation torque ripple of brushless DC motor. Through theoretical derivation, it was proved that when the control system adopted PWM - ON modulation mode, the switching loss of six switches was distributed evenly, and the torque ripple of brushless DC motor in the process of commutation was minimum. Finally, the experimental results show that the conclusion is correct.

关 键 词：直流无刷电机 PWM调制方式 开关损耗 换向转矩脉动 

分 类 号：TM351[电气工程—电机]