基于二维四区域法的单边复合次级直线感应电机力特性建模研究

Modeling of Force Characteristics of Single Side Compound Secondary Linear Induction Motor Based on Two Dimensional Four Region Method

针对地铁用单边复合次级直线感应电机力特性解析方法中存在的模型构建困难、分析繁琐、计算量大、工程实用性差等问题,提出一种建模简单且计算量小的单边复合次级直线感应电机简化二维四区域电磁模型。当电机初级绕组通入三相对称交流电产生行波磁场,与地面非磁性次级导体中感应的涡流磁场相互作用,可同时产生推力和法向力。以麦克斯韦电磁方程为基础,对其磁场进行分析,得到该类电机推力、法向力的解析表达式。通过有限元仿真、实验平台测试结果与解析结果进行比较,验证了解析表达式的正确性。实现力特性的快速准确计算,对单边直线感应电机设计有着重要意义。

There are some problems with regard to the force characteristic analysis model of the single-sided compound secondary linear induction motor used in subway,such as difficult to construct,complicated analysis process and large amount of calculation,which are not suitable for engineering calculation.A simplified two-dimensional four-region electromagnetic model of a compound secondary linear induction motor was presented.When three phase AC symmetric alternating current input the primary winding of the motor,traveling wave magnetic field was generated.Eddy current magnetic field was induced in the secondary nonmagnetic conductor on the ground,and the thrust force and normal force were produced at the same time.Based on the Maxwell’s electromagnetic equations,the magnetic field was analyzed and the analytical expressions of thrust and normal force were obtained.By comparing the results of finite element simulation and experiment platform,the correctness of the analytical expression was verified,and the fast and accurate calculation of force characteristics was realized,which is of great significance to the design of single-sided linear induction motor.