起动条件对永磁电动机退磁状况的影响

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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

Received: 20 June 2018 Published: 15 January 2019

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	Articles by authors
	Yu Peijin
	Zhu Changqing
	Shen Yiming
	Zhang Guobin

Cite this article:

Yu Peijin,Zhu Changqing,Shen Yiming等. Effect of starting conditions on demagnetization of permanent magnet motors[J]. Electrical Engineering, 2019, 20(1): 12-17.

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http://dqjs.cesmedia.cn/EN/Y2019/V20/I1/12

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