U型无铁心永磁同步直线电机磁场建模与分析

摘要

Due to the influence of the core breaking,the traditional iron core linear motor had the end-effect of lateral and vertical side,which made the output of the thrust line fluctuate greatly.The ironless permanent magnet synchronous linear motor has the advantages of zero slot effect,simple structure and flexible control.Based on the analysis of air gap magnetic field ironless permanent magnet synchronous linear motor problems by using two kinds of analytical method,namely equivalent magnetic potential method and the equivalent magnetizing current method,and the finite element analysis of the magnetic field using the finite element method.The analytical method for magnetic field analysis was verified to be accurate.By changing the motor parameters,the optimization design was achieved,which provided the reference for the design and analysis of same kind of motors.%传统的铁心式直线电机由于铁心开断的影响,造成了横向和纵向边端效应,使推力输出波动较大;无铁心永磁直线电机具有零齿槽效应的优点,结构简单,控制灵活.采用两种解析法求解无铁心永磁同步直线电机气隙磁场的问题,即等效磁势法和等效磁化电流法,同时采用有限元法对电机磁场进行有限元分析,验证解析法磁场解析计算的准确性.最后分析电机主要尺寸对气隙磁场的影响.通过改变电机参数,进行了优化设计,为同类电机的设计与分析提供了参考.