开关磁阻电机的定子振动模态分析

大的振动和噪声阻碍了开关磁阻电机的推广应用.由于定子的径向振动是开关磁阻电机噪声的主要根源,因此定子振动系统的模态分析是降噪研究的有效手段.该文利用三维有限元法模态分析,通过比较、分析开关磁阻电机定子振动系统的固有频率在不同绕组安装工艺和散热筋结构条件下的变化,得出了加固绕组和采用周向散热筋结构有利于降低开关磁阻电机噪声水平的结论.通过比较一台实验样机的模态分析计算结果和实测结果,证实了模态分析计算的有效性.

MODAL ANALYSIS OF STATOR VIBRATION FOR SWITCHED RELUCTANCE MOTORS

Considerable vibration and acoustic noise limit the application of Switched Reluctance Motors (SRMs). As the radial vibration of stator is the origin of the acoustic noise of SRMs, model analysis of stator vibration is the effective way to the research for low acoustic noise. Three-dimension finite element model analysis was adopted in this paper to analyze and compare the inherent frequencies of SRMs varying with different winding assembly drafts and radiating rib structures. Eventually the conclusion is drawn that both reinforce windings and circumferential direction ribs structures are favorable for lowering the acoustic noise level of SRMs. The validity of modal analysis was proved by comparing the modal analysis results with the measured results of a prototype motor.