近极槽永磁电动机齿顶漏磁对转矩的影响

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Abstract The zigzag leakage flux of surface-mounted permanent magnetic synchronous machine(PMSM) with similar poleand slot number is bigger than other kinds of electric machines. The bigger zigzag leakage flux decreases the output torque of the electric machines and causes the torque to ripple. Therefore it is important to analyze the influence of zigzag leakage flux on the torque. According to the feature that the periodicity of zigzag leakage flux is the multiple of the phase and the zigzag leakage flux is symmetry about the origin, and the Fourier expansions of zigzag leakage flux under one phase are analyzed. Using Faraday law of electromagnetic induction, the zigzag leakage flux is related to the back electromotive force of three phase windings. Then on this basis the analytical expression of the relationship between the zigzag leakage flux and torque is deduced. The results of the finite element simulation and quantitative analysis indicate that the zigzag leakage flux decreases the average torque of the electric machines and produces six-order torque ripple. Therefore, the analytical method is proved to be correct.

Key words： Surface-mounted PMSM zigzag leakage flux Fourier decomposition similar pole and slot number electromagnetic torque

Received: 12 December 2011 Published: 20 March 2014

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TM351

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	Articles by authors
	Xia Jiakuan
	Peng Bing
	Wang Chengyuan
	Dong Ting
	Sun Yibiao
	Hang Guixin

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Xia Jiakuan,Peng Bing,Wang Chengyuan等. Influence of the Zigzag Leakage Flux on Torque in Surface-Mounted PM Synchronous Motors with Similar Number of Poles and Slots[J]. Transactions of China Electrotechnical Society, 2012, 27(11): 97-103.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I11/97

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