永磁同步直线电机磁阻力优化设计  

Optimal Design of Magnetic Resistance of Permanent Magnet Synchronous Linear Motor

作　　者：许孔孔 贾萍 尹海韬 刘云涛 XU Kongkong;JIA Ping;YIN Haitao;LIU Yuntao(Xi’an Aerospace Propulsion Testing Technology Research Institute,Xi’an 710025,China)

机构地区：[1]西安航天动力测控技术研究所,西安710025

出　　处：《微电机》2022年第10期44-47,75,共5页Micromotors

摘　　要：磁阻力是影响直线电机推力波动的重要因素,基于傅里叶级数法进行了齿槽力的解析式推导,依据理论解析式,通过削弱磁阻力的谐波幅值进行磁阻力的抑制。首先分别建立8极9槽和拆槽后直线电机有限元模型进行仿真,验证了理论解析的正确性;然后研究了端部齿相对次级永磁体不同位置时对磁阻力的影响,通过优化端部齿进行端部力的削弱。和初始模型相比,优化后的直线电机磁阻力降低了62.9%,推力波动降低了77.1%,为直线电机的设计提供了参考。Magnetic resistance is an important factor affecting the thrust fluctuation of linear motors.Based on the Fourier series method,the cogging force is analytically deduced.According to the theoretical analytical formula,the magnetic resistance is calculated by weakening the harmonic amplitude of magnetic resistance.inhibition.Firstly,the finite element model of 8-pole,9-slot and the linear motor after slotting was established for simulation to verify the correctness of the theoretical analysis;then,the influence of the end teeth on the magnetic resistance when the position of the end tooth relative to the secondary permanent magnet is different was studied,and the optimization was carried out.The end teeth perform end force attenuation.Compared with the initial model,the optimized linear motor’s magnetic resistance is reduced by 62.9%,and the thrust fluctuation is reduced by 77.1%,which provides a reference for the design of the linear motor.

关 键 词：直线电机 端部力 齿槽力 有限元法 

分 类 号：TM359.4[电气工程—电机]