双初级耦合直线感应电动机集总参数模型

在动子进行高速大推力运动场合,直线感应电动机可以设计为N(N≥2)台电机初级绕组上下并联布置共用一个次级的结构形式.本文针对N=2的情形,分析了双初级耦合直线感应电动机上下初级绕组边缘气隙磁场耦合和次级涡流路径耦合关系,在此基础上针对双初级耦合直线感应电动机中双初级上下定子单独通电、双初级同时通入同向电流、双初级同时通入反向电流等不同工况,建立了统一的集总参数模型,并进行了耦合参数的辨识.模型计算和小型试验样机实验结果吻合较好,证明了理论分析的正确性.

Lumped parameter model of double-primary linear induction motor

In some field where motor secondary needs to get great thrust and high speed,the linear induction motor can be designed to have N(N≥2) primaries sharing only one secondary.For N=2,the edge gas magnetic coupling between up and down primaries in the double-primary linear induction motor was analyzed,and the current wave path coupling on the secondary was studied,based on which,for the different working conditions of double-primary linear induction motor such as only up or down primary works,the up and down stators having in-phase currents or the two stators having reversed currents,the uniform lumped-parameter model was established,and the coupling parameters in the model were identified.The model calculation is in accord with the experiment results,which proves the theoretical analysis is correct.