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.
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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2020, Vol. 35 
