电气工程学报 ›› 2018, Vol. 13 ›› Issue (5): 1-7.doi: 10.11985/2018.05.001

• •    下一篇

轨道交通用初级永磁型直线电机电磁特性分析

杨雄1,张凤阁1,王秀平2   

  1. 1. 沈阳工业大学电气工程学院 沈阳 110870
    2. 沈阳工程学院电力学院 沈阳 110136
  • 收稿日期:2017-09-24 出版日期:2018-05-25 发布日期:2019-11-22
  • 作者简介:杨 雄 男 1993年生,硕士研究生,研究方向为电机及其控制技术。|张凤阁 男 1963年生,教授,博士生导师,研究方向为特种电机及其控制技术。
  • 基金资助:
    国家自然科学基金项目(51777127);辽宁省博士启动基金项目(201601220);辽宁省教育厅科研项目(L2015373)

Electromagnetic Characteristics Analysis of Primary Permanent Magnet Linear Motor for Rail Transit

Yang Xiong1,Zhang Fengge1,Wang Xiuping2   

  1. 1. Shenyang University of Technology Shenyang 110870 China
    2. Shenyang Institute of Engineering Shenyang 110136 China
  • Received:2017-09-24 Online:2018-05-25 Published:2019-11-22

摘要:

直线感应电机应用于轨道交通驱动系统,存在功率因数低、效率低的问题,本文提出了一种新型结构初级永磁型直线电机,该电机采用短初级(动子侧)、长次级(定子侧)结构,电机的电枢绕组和永磁体均安装于初级,次级仅为凸极磁阻结构。该种电机不仅具有常规直线感应电机结构简单和非黏着直接驱动等优点,且功率因数和效率等性能指标优良。论文首先详细介绍了该种电机的结构特点和运行机理,利用等效磁路法推导了该电机的气隙磁通密度方程和同步速方程;然后设计了一台12/8极的初级永磁型直线电机,借助应用有限元软件,进行了参数化建模和磁场分析,得到了次级极弧系数对磁场调制能力的影响规律;接着分析了电机的气隙磁场,得到了绕组反电动势波形图和气隙磁密傅里叶分解图形;最后,研究了电机静态特性,得到了次级结构对定位力的影响,电流大小对静态电磁推力的影响。仿真结果证明了电磁设计方案的合理性,为轨道交通直线驱动电机的研究提供了有价值的参考。

关键词: 初级永磁型直线电机, 轨道交通, 极弧系数, 有限元方法

Abstract:

The problem of low power factor and low efficiency is existed in the application of the linear induction drive motor to the rail transit system. This paper puts forward a kind of special structure of primary permanent magnet linear motor. The motor consists of short primary (rator side) and long secondary (stator side), armature windings and permanent magnets are installed in the primary side, and secondary are only salient pole reluctance. This kind of motor not only has the advantages of simple linear structure, non adhesion and direct drive, but also has good performance indexes such as power factor and efficiency, and has broad application prospects. Firstly, the structure characteristics and operation mechanism of the motor are introduced in detail. The air gap flux density equation and the synchronous speed equation are deduced by using the equivalent magnetic circuit method. Second, a 12/8 pole primary permanent magnet linear motor is designed. Parametric modeling and magnetic field analysis are carried out by using finite element software, and the influence of secondary polar arc coefficient on magnetic field modulation capability is obtained. Then, the air gap magnetic field of the motor is analyzed, and the winding back EMF waveform and the gap density fourier decomposition pattern are obtained. Finally, the static characteristics are studied, and the influence of secondary structure on the positioning force and the influence of the magnitude of current on the static electromagnetic thrust are studied. The simulation results show the rationality of the electromagnetic design scheme. It provides a valuable reference for the study of the linear drive motor of rail transit.

Key words: PPMLM, rail transit, pole-arc coefficient, finite element method

中图分类号: