标题：Demagnetization Analysis of Line-Start Permanent Magnet Synchronous Motors during Its Starting Process
作者：Yu, Peijin; Zhu, Changqing; Shen, Yiming; Zhang, Guobin
作者机构：[Yu, Peijin; Zhu, Changqing; Shen, Yiming] Shandong Univ, Sch Elect Engn, Jinan, Shandong, Peoples R China.; [Zhang, Guobin] State Grid Binzhou Bran 更多
会议名称：3rd International Conference on Electrical, Automation and Mechanical Engineering (EAME)
会议日期：JUN 24-25, 2018
来源：PROCEEDINGS OF THE 2018 3RD INTERNATIONAL CONFERENCE ON ELECTRICAL, AUTOMATION AND MECHANICAL ENGINEERING (EAME 2018)
关键词：line-start permanent magnet; starting process; demagnetization; finite; method; different start voltages
摘要：This paper deals with the analysis for the irreversible demagnetization characteristics of a NdFeB, 'W-type' permanent magnet in the line-start permanent magnet synchronous motors (LSPMSM). By using the finite element method, the influence of different permanent magnets status and the different start voltages on demagnetization were studied during starting process. The largest demagnetization magnetic field was calculated by the minimum value of the projection of flux density in magnetization direction for reference points. Through the comparison of the demagnetization under different conditions, the most serious demagnetization is occurred in low voltage starting process, at the corner points of magnets. It is of great significance to analyze the performance of permanent magnets in actual operation, and it also can be used for the fast design of LSPMSM.