一种直线感应电机的电磁场有限元分析

A Study Method on Magnetic Force Characteristic of A Linear Induction Motor

直线感应电机目前已经在地铁、轻轨等轨道交通中得到了很好的应用,在高速交通系统和其它一些游乐设施中也有光明的前景。本文针对正在建设中的直线电机综合测试试验台所用的直线电机,通过合理简化的方法建立了MAXWELL2-D仿真模型,同时也介绍了该类电机的结构和其传统等值电路。通过对有限元仿真结果与直线电机等效电路的理论计算值比较研究,发现用这两种不同方法得出的直线电机牵引力值和初级电流值非常接近,从而验证了仿真的正确性,仿真结果对今后控制系统的优化有着重要意义。

The linear induction motor has been well used in metro, light rail now, and also has a trice future in high speed transport systems and amusement equipments. According to the linear induction motor test-bed, which is been building, we set up a 2-D model of the linear induction motor through logical methods. At the same time this paper presents it＇ s construction and traditional equivalent circuit. Comparing the two results with finite element analysis and traditional equivalent circuit, we find they are close to each other in many ways such as thrust force, normal force, current magnitude and so on. On base of these, the validities of the 2--D finite element analysis is clarified by comparison of the calculated results. As a result, we can supply a good theoretical base to this kind of motor control.