共直流母线开绕组永磁同步电机系统零序电流抑制策略

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Abstract Due to the common voltage generated by converters and the triple frequency harmonic component of back EMF, the zero sequence current will be produced when the open winding permanent magnet synchronous motor (PMSM) is supplied by a single DC bus, which will reduce the efficiency and operation stability. In this paper, a zero sequence current suppression strategy is proposed for the open winding PMSM system with one common DC bus. Based on the mathematical model of open winding PMSM and zero sequence circuit, the common voltage is generated by two converters to counteract the triple frequency harmonic component of back EMF, and then the zero sequence current can be eliminated. Furthermore, the modulation capability and maximum modulation index of the proposed zero sequence current suppression and the traditional common voltage suppression is analyzed and compared. Finally, the experimental system of open winding PMSM system is developed to validate the availability of the proposed zero sequence current suppression strategy.

Key words： Open winding permanent magnet synchronous motor common mode voltage triple frequency harmonic zero sequence current maximum modulation index

Received: 15 January 2014 Published: 30 October 2015

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TM351

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	Nian Heng
	Zeng Hengli
	Zhou Yijie

Cite this article:

Nian Heng,Zeng Hengli,Zhou Yijie. Zero Sequence Current Suppression Strategy for Open Winding Permanent Magnet Synchronous Motor with Common DC Bus[J]. Transactions of China Electrotechnical Society, 2015, 30(20): 40-48.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I20/40

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