减小法向力波动永磁同步直线电动机优化设计  

Optimization Design of Permanent Magnet Linear Synchronous Motor for Reduce Normal Force Fluctuation

作　　者：宁建荣[1,2] 沈丽[1] 曹景全[1] 王成元[1] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110178 [2]沈阳化工大学机械工程学院,沈阳110142

出　　处：《微电机》2012年第9期43-47,共5页Micromotors

基　　金：高等学校博士学科点专项科研基金资助项目(20102102110001)

摘　　要：高速高精度机床直线进给系统用永磁直线同步电机(PMLSM)存在法向力波动的问题,法向力波动会造成进给工作台振动,影响精密机床的加工精度和定位精度。分析表明,磁阻力波动是产生法向力波动的主要原因。采用初级齿槽两次倒角优化和次级斜极相结合的方法来减小磁阻力波动。应用有限元方法对齿槽结构和斜极角度进行优化,计算优化后的电动机参数,并使用分层有限元分析方法进行仿真计算。仿真结果表明,采用该优化方法的永磁直线同步电机可在推力损失较小的情况下有效抑制法向力的波动幅值。Permanent magnet linear synchronous motor （PMLSM）exist the problem of normal force fluctua- tion, especially for the servo feeding system of high-velocity and high-precision CNC machine tools, the nor- mal force fluctuation can cause the feeding table in vibration and produce resonance with other moving com- ponents in the servo feeding system . Analysis shows that detent force fluctuation is the predominant factor. Adopt the methods that teeth optimization combines with skew can effectively reduce the detent force fluctua- tion. The optimization of parameters was calculated by using the finite element method （FEM）. Simulations results prove that with the precondition of the thrust force loss slightly, these optimization methods can reduce the normal force fluctuation significantly.

关 键 词：永磁直线同步电机 法向力 斜极 齿槽优化 有限元 

分 类 号：TM341[电气工程—电机] TM351