共母线开绕组永磁同步电机缺相容错型直接转矩控制

doi:10.19595/j.cnki.1000-6753.tces.191393

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摘要为了进一步提升共母线开绕组永磁同步电机系统在一相开路故障情况下的运行性能,提出一种基于改进空间矢量调制的缺相容错型直接转矩控制策略。首先,分析共母线开绕组永磁同步电机直接转矩控制系统无故障和一相开路时运行机理上的区别。基于此,对直接转矩控制系统中电磁转矩、定子磁链的控制器进行重构,并将零序电流控制器移除。采用重构后的电磁转矩、定子磁链控制器可生成定子电压参考值。然而,如若继续沿用无故障时的空间矢量调制策略,将无法生成所需的实际定子电压。为此,在分析剩余非故障相所能产生电压矢量的基础上,提出一种改进型空间矢量调制策略。最后,在一台功率为1kW的开绕组永磁同步电机上对所提容错型直接转矩控制策略进行验证。实验结果表明,采用所提策略使得该电机驱动系统在发生一相开路故障的情况下仍具有较小的电磁转矩和定子磁链纹波。

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	林晓刚
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关键词 ：开绕组永磁同步电机, 一相开路, 容错型直接转矩控制, 电磁转矩

Abstract：In order to further improve the operation performance of open-end winding permanent magnet synchronous motor (OEW-PMSM) with common DC bus under open phase circuit, a fault-tolerant direct torque control (F-DTC) based on improved space vector pulse width modulation (SVPWM) was proposed in this paper. Firstly, the difference in DTC system for OEW-PMSM under fault-free condition and open phase circuit condition was analyzed. Accordingly, the controller of electromagnetic torque and stator flux of DTC was modified, and the controller of zero-sequence current was removed. By utilizing the modified controller, the reference stator voltage can be generated. However, its corresponding actual value was difficult to obtain if the SVPWM module of fault-free condition was used. For this reason, a novel SVPWM strategy was proposed by analyzing the voltage vectors generated by the remaining healthy phases. Finally, the proposed F-DTC was verified on a 1kW OEW-PMSM. The results show that the proposed F-DTC has small ripples of torque and stator flux even under open phase circuit.

Key words： Open-end winding permanent magnet synchronous motor (OEW-PMSM) open phase circuit fault-tolerant direct torque control (F-DTC) electromagnetic torque

收稿日期: 2019-10-28

PACS:

TM351

基金资助:国家自然科学基金（51777096）和江苏省研究生科研创新计划（KYCX17_0262）资助项目。

通讯作者: 林晓刚男,1990年生,博士研究生,研究方向为永磁同步电机控制。E-mail: XG_LIN_NUAA@126.com

作者简介: 黄文新男,1966年生,教授,博士生导师,研究方向为电机及其控制、新型风力发电技术、电能变换、航空电源等。E-mail: huangwx@nuaa.edu.cn

引用本文:

林晓刚, 黄文新, 姜文, 赵勇, 吴旭. 共母线开绕组永磁同步电机缺相容错型直接转矩控制[J]. 电工技术学报, 2020, 35(24): 5064-5074. Lin Xiaogang, Huang Wenxin, Jiang Wen, Zhao Yong, Wu Xu. Fault-Tolerant Direct Torque Control for Open-End Winding Permanent Magnet Synchronous Motor with Common DC Bus Under Open Phase Circuit. Transactions of China Electrotechnical Society, 2020, 35(24): 5064-5074.

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