研究与开发
起动条件对永磁电动机退磁状况的影响
于佩瑾1 , 朱常青1 , 沈一鸣1 , 张国斌2
1. 山东大学电气工程学院,济南 250012;
Effect of starting conditions on demagnetization of permanent magnet motors
Yu Peijin1 , Zhu Changqing1 , Shen Yiming1 , Zhang Guobin2
1.School of Electrical Engineering, Shandong University, Ji’nan 250012;
摘要 本文研究了一台W型钕铁硼永磁体自起动永磁同步电动机在起动过程中的退磁情况,分析了同一永磁体不同点的退磁状况,以及施加不同负载与不同电压时对永磁体的退磁的影响,并得出永磁体边角处更易退磁、低压起动及重载起动时永磁体退磁风险较大3个主要结论。就降低电动机退磁风险提出了一种解决方案,对实际运行中分析永磁体性能和改进电动机设计具有重要意义。
关键词 ：
自起动永磁同步电动机 ,
起动过程 ,
永磁体退磁 ,
有限元方法
Abstract ：In this paper, the demagnetization of a line-start permanent magnet synchronous motor with W-type NdFeB permanent magnet is studied during start process. The demagnetization status of different points of the same permanent magnet is analyzed. In addition, the influence of demagnetization on permanent magnets under different loads and different voltages are also analyzed. The paper shows that corners of permanent magnets are easier to demagnetize and the risk of permanent magnet demagnetization is greater under low voltage start and heavy load start. The method to reduce the risk of motor demagnetization is proposed in this paper, which provides guidance for analysis of permanent magnet performance and improvement motor design in actual operation.
Key words ：
line-start permanent magnet synchronous motor
starting process
demagnetizaton
finite element method
收稿日期: 2018-06-20
出版日期: 2019-01-15
作者简介 : 于佩瑾（1995-）,女,硕士研究生,研究方向为永磁电机。
引用本文:
于佩瑾, 朱常青, 沈一鸣, 张国斌. 起动条件对永磁电动机退磁状况的影响[J]. 电气技术, 2019, 20(1): 12-17.
Yu Peijin, Zhu Changqing, Shen Yiming, Zhang Guobin. Effect of starting conditions on demagnetization of permanent magnet motors. Electrical Engineering, 2019, 20(1): 12-17.
链接本文:
http://dqjs.cesmedia.cn/CN/Y2019/V20/I1/12
[1] 王秀和. 永磁电机[M]. 2版. 北京: 中国电力出版社, 2011.
2019, Vol. 20 
