针对永磁直线同步电机（PMLSM）边端力最小化问题，提出在初级铁心两端增加辅助铁心的方法，有效削弱PMLSM的边端力。首先分析了边端力产生的机理，对齿壁上所受电磁力进行解析研究。当初级铁心两端辅助铁心高度为一个气隙长度，且辅助铁心长度为1/4永磁极距时，边端力有最小值。以一台36槽12极轴向充磁圆筒永磁直线同步电机(TPMLSM)为例，进行有限元仿真分析和试验测试，边端力的有限元分析值和试验值较吻合，证实了所提方法能够有效削弱PMLSM边端力，为该类电机边端力最小化提供了一种简单有效的技术手段。

Aiming at the problem of end force minimization of permanent magnet linear synchronous motor（PMLSM），an effectively method to weaken the end force by adding auxiliary iron core at the both ends of the primary iron core is proposed. Firstly, the mechanism of the end force and the electromagnetic force on the tooth wall are analyzed. When the height of the auxiliary iron core at both ends of the primary iron core is an air gap length, and the length is 1/4 permanent magnet pole distance, the end force has the minimum value. Taking a 36-slot/12-pole axial-magnetized tubular permanent magnet linear synchronous motor (TPMLSM) as an example, the finite element simulation analysis and experimental test are carried out. The finite element analysis value is in good agreement with the experimental value, which proves that the proposed method can effectively weaken the end force of PMLSM, and also provides a simple and effective method of the end force minimization for PMLSM.

TM351

河南省科技攻关项目(212102210250)；2022年度河南省高等学校重点科研项目（22B470003）；南阳市科技攻关项目（KJGG047）