定子无磁轭模块化轴向永磁电机磁极表面开槽分析

doi:10.19595/j.cnki.1000-6753.tces.161391

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Abstract The permanent magnets (PMs) are the magnetic excitation source in the permanent magnet synchronous motor (PMSM). It could seriously affect the performance of the PMSM. Due to time harmonics of stator current and high-order space harmonics of air gap magnetic field, the loss in permanent magnets is considerable and is easy to cause the partial over-temperature. As a result, the irreversible demagnetization of permanent magnets is occurred with poor cooling condition. This paper discusses a way to reduce the magnet eddy current loss. Herein, a yokeless and segmented armature (YASA) axial flux PMSM is taken as an example, where its parameters are 10 poles, 12 stator segments and 20kW. In order to reduce the magnet eddy current loss, the influences of several factors were studied including the groove depth, groove method and groove number. The expression of magnet eddy current loss and other parameters were calculated respectively. And then the calculated results from the analytic method were compared with those calculated by three dimensional finite element method. Compared with the air gap flux density of the rated load, the reasonable way and number of magnet surface groove were chosen.

Key words： Yokeless and segmented armature magnet eddy current loss magnet surface groove air gap flux density

Received: 19 August 2016 Published: 30 August 2017

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TM351

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	Articles by authors
	Wang Xiaoyuan
	Qi Dandan
	Wang Hui

Cite this article:

Wang Xiaoyuan,Qi Dandan,Wang Hui. Analysis on Magnet Surface Groove of Yokeless and Segmented Armature Axial Flux Motor[J]. Transactions of China Electrotechnical Society, 2017, 32(16): 145-152.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161391 OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I16/145

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