分数槽永磁同步直线电机空载气隙磁密解析

Analysis of No-Load Air Gap Flux Density of Fractional-Slot Permanent Magnet Synchronous Linear Motor

以分数槽永磁同步直线电机(FPMSLM)为研究对象,利用解析法推导其空载气隙磁场解析式,并用有限元法进行验证。推导了FPMSLM定转子整体耦合长度下的空载气隙磁场解析式。以2台分数槽永磁同步单元电机为例,同时用解析法和有限元法对其定转子不同相对位置下的空载气隙磁场进行计算,2种方法得出的空载气隙磁密波形具有良好的吻合性,验证了解析法计算FPMSLM空载气隙磁场的可行性,并为FPMSLM空载气隙磁场的优化提供理论支持。

Taking the fractional-slot permanent magnet synchronous linear motor(FPMSLM)as the research object,the analytical formula of its no-load air-gap magnetic field is deduced by the analytical method and verified by the finite element method.The analytical formula of the no-load air-gap magnetic field under the integral coupling length of the FPMSLM stator and rotor is derived.Taking two fractional-slot permanent magnet synchronous cell motors as examples,the no-load air-gap magnetic field under different relative positions of the stator and rotor is calculated by the analytical method and the finite element method at the same time.The waveforms of two methods match very well,which verifies the validity of the analytical method to calculate no-load air-gap magnetic field of FPMSLM,providing theoretical support for the optimization of no-load air-gap magnetic field of FPMSLM.