摘  要：低速永磁直线同步电机是利用初、次级表面开槽引起气隙磁导波变化而工作的，首先通过对气隙磁导波的分析，给出了初、次级开槽的气隙磁导波的计算方法。在此基础上，对电机的气隙磁场进行了分析与Magnet仿真，对轴向和径向励磁结构做了对比，为进一步分析低速永磁直线同步电机的动态特性奠定了基础。
关键词：低速永磁直线同步电机；气隙磁场；气隙磁导波；励磁结构

Abstract:  The moving of Permanent-magnet linear synchronous motor with electromagnetic low speed (PMLSML) is due to the variation of air gap permeance wave,which is given rise to as a result of the surface slot of the primary and the secondary.On the basic analysis of air gap permeance wave first, deduced the proximation calculation of air gap permeance wave.On that basis, analysed and simulated by magnet  the air gap flux of motor. and made  a comparative study between the excitation structure of axial and radial direction.It laid the foundation of the further analysis about dynamic characteristics of low-speed electric motor.
Key words:  PMLSML;  air gap flux;  air gap permeancewave;  excitation structure