Electromagnetic design method of linear induction motor considering lateral end effect

一种考虑横向端部效应影响的直线感应电机电磁设计方法

¹ College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
² Yicheng Power Supply Company of State Grid, Yicheng 043500, China
³ CRRC Yongji Electric Motor Co. Ltd, Xi'an 710000, China

Received: 16 January 2021

Abstract

Due to the complex end effect, it is difficult for the linear induction motor to design and analyze with the "road" calculation and two-dimensional field calculation. Considering the end effect, skin effect and secondary leakage reactance of the eddy current of the secondary induction plate, a linear induction motor electromagnetic design and calculation program was programmed via VB language. A two-dimensional finite element analysis method was proposed to approximate the lateral end effect on linear induction motor performance by multiplying the two lateral end effect coefficients into secondary induction plate resistivity and air-gap relative permeability. The accuracy for both calculation of end effect coefficients by "road" calculated program and considering lateral end effect in two-dimensional finite element analysis was validated by using the experiment and three-dimensional full model finite element, respectively. This work proposes the calculation method of the lateral end effect, which is faster and more accurate for the electromagnetic design as well as the finite element simulation of linear induction motor.

摘要

针对直线感应电机复杂端部效应对"路"算和有限元二维"场"算带来的设计分析困难问题。考虑端部效应、次级感应板涡流的集肤效应和次级漏电抗，编写了基于VB语言的直线感应电机电磁设计"路"算程序；提出一种将横向端部效应的2个系数分别乘入次级绕组电阻率和电磁气隙磁导率，近似等效横向端部效应对直线感应电机性能影响的二维有限元分析方法。实验及三维有限元计算结果验证了"路"算设计程序端部效应系数计算及二维有限元"场"算中横向端部效应计入方法的正确性。所提出的横向边端效应计算方法为直线感应电机的电磁设计及有限元仿真提供了更便捷、准确的手段和方法。