无刷直流电机换相转矩脉动抑制新策略  

Torque Ripple Reduction of Brushless DC Motor

作　　者：王会明[1] 丁学明[1] 尹武[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《电气传动》2012年第10期18-21,34,共5页Electric Drive

基　　金：上海理工大学光电学院教师创新基金(GDCX-T-101)

摘　　要：无刷直流电机(BLDCM)应用范围广,易于控制,但缺点是转矩脉动较大。通过分析HPWM-LON调制方法对无刷直流电机换相期间电磁转矩的影响,提出一种改进的HON-LON和HPWM-LON相结合的脉宽调制方法。首先,根据三相电流方程得出换相时的电机电磁转矩;其次,比较换相时电磁转矩和稳态时电机电磁转矩的差别,得到换相电磁转矩脉动;最终,通过控制换相时导通相全通的时间,使电机电磁转矩脉动最小。实验证明,提出的改进脉宽调制方法能有效地抑制转矩脉动,提高系统性能。Brushless DC motor （BLDCM） have a wide range of applications, easy to control, but its weakness is large torque ripple. Through the analysis of HPWM-LON modulation method for brushless DC motor% influence of electromagnetic torque during phase change, an improved pulse width modulation method was proposed, the combination of HON- LON and HPWM - LON. First of all, according to three phase current equations of commutation, motor electromagnetic torque can be get~ second, compare commutation motor electromagnetic torque and steady-state motor electromagnetic torque, commutation electromagnetic torque ripple can he de- duced~ Finally, through the control on-all time of conducting state MOSFET, motor electromagnetic torque ripple can be minimum. The experiment proves the proposed improved pulse width modulation method can ef- fectively restrain the torque ripple and improve system performance.

关 键 词：无刷直流电机 相电流 转矩脉动 脉宽调制 

分 类 号：TM33[电气工程—电机]