一种优化表插式永磁电机性能的方法

doi:10.19595/j.cnki.1000-6753.tces.L70358

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Abstract Because of the large torque ripple of inset permanent magnet synchronous motor (PMSM), a method of notching auxiliary slots between adjacent permanent magnets is proposed to improve the performance of PMSM. The principle of notching auxiliary slots is analyzed. The auxiliary slots between poles can improve the distribution of air-gap flux density and reduce the harmonic content of back EMF, thus, the torque ripple can be suppressed. The auxiliary slots between the poles will change quadrature-axis and direct-axis inductance of the motor, accordingly its ability of flux-weakening will be improved. Finite element analysis (FEA) is used to acquire the best slot shape. It is verified the auxiliary slots can reduce the harmonics of back EMF and restrain the torque ripple. The motor inductances are calculated by FEA. The air gap flux densities of different rotor structures are compared under equivalent demagnetization status and d-axis current at different maximum speed. It is shown that the inset PMSM with auxiliary slots is more suitable for speed control of flux-weakening. The new proposed structure will provide a certain reference value for improving the performance of motor.

Key words： Inset permanent magnet synchronous motor auxiliary slot torque ripple speed control of flux-weakening direct-axis inductance

Received: 19 April 2017 Published: 31 January 2018

PACS:

TM351

Fund:国家自然科学基金（51377039）和安徽省工业节电与电能质量控制协同创新中心开放课题（KFKT201505）资助项目

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	Articles by authors
	Bao Xiaohua
	Wu Changjiang
	Hu Yunpeng
	Wang Chunyu

Cite this article:

Bao Xiaohua,Wu Changjiang,Hu Yunpeng等. A Method for Optimizing Performance of Inset Permanent Magnet Motor[J]. Transactions of China Electrotechnical Society, 2018, 33(2): 238-244.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L70358 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I2/238

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