凹型端齿削弱永磁直线电机端部力波动方法

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Abstract Analytical expressions of the normal component and the thrust component of the end force are obtained by integrating the virtual displacement principle,which is described by the flux distribution on the longitudinal end face of the rotor.Through the analysis of the Fourier series,the concave profile end tooth structure considering the reverse phase compensation principle is put forward.The structure can eliminate the odd harmonic wave of the normal and thrust force fluctuations.It can also overcome the shortcomings of the traditional methods which lead to the motor’s longitudinal pitching movement trend by optimizing rotor length to reduce the thrust fluctuation.The rotor’s lateral pitching movement trend can be eliminated by the structure too.In the end,A 12 slots 11 poles PMLM with weaker slot effect is taken for example.The finite element simulation and experiment are employed,and the results show that the method can reduce the normal and thrust ripples of the end effect force.

Key words： Permanent magnet linear motor (PMLM) end effect normal component of the end effect force thrust component of the end effect force concave profile end-tooth

Received: 22 December 2014 Published: 25 May 2015

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TM351

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	Peng Bing
	Liu Tiefa
	Zhang Nan
	Xia Jiakuan
	Jing Rubao
	Sun Yibiao

Cite this article:

Peng Bing,Liu Tiefa,Zhang Nan等. A Method for Reducing the End Effect Force Fluctuation by the Concave Profile End-tooth in Permanent Magnet Linear Motors[J]. Transactions of China Electrotechnical Society, 2015, 30(7): 119-124.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I7/119

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