双极型PWM调制方式对无刷直流电机换相转矩脉动的影响  

Influence of Bipolar PWM Method on Commutation Torque Ripple of BLDCM

作　　者：杨新龙[1] 窦满峰[1] 张振华[1] 

机构地区：[1]西北工业大学,西安710129

出　　处：《微电机》2013年第5期36-39,共4页Micromotors

基　　金：西北工业大学研究生创业种子基金资助项目(Z2012103)

摘　　要：针对脉冲宽度调制方式对无刷直流电机换相过程中电磁转矩脉动影响的问题,对双极性PWM调制方式与上斩下不斩PWM调制方式进行了对比研究。理论分析表明双极性PWM调制方式可以通过消除截止相上的二极管续流现象,消除因二极管续流引起的电磁转矩脉动,仿真结果中,两者的截止相电流脉动最大分别为0.12 A和0,试验结果两者的截止相最大电流脉动分别为额定电流的20%和5%,表明双极性PWM调制方式可以减小换相期间的转矩脉动。A comparative study on bipolar PWM method and PWM-ON method for the pulse width modula- tion on the impact of the electromagnetic torque ripple in brushless DC motor commutation process. Theoreti- cal analysis shows that the ripple current caused by the diode freewheeling in the non-commutation zone can be eliminated, and so the torque tipples can also be decreased by the bipolar PWM method. Simulation re- sults between the two non-commutation phases maximum current ripple, were respectively 0. 12A and 0, Test results between the two non-commutation phases maximum current tipple, were respectively 20% and 5% of the rated current, indicating that the bipolar PWM method can reduce the torque ripple during com- mutation.

关 键 词：无刷直流电动机 转矩脉动 双极型PWM调制 

分 类 号：TM361[电气工程—电机]