Research on Flux-Weakening Performances for Five-Phase Fault-Tolerant Permanent-Magnet Vernier Motors
Liu Guohai1, 2, Yang Xinyu1, 2, Xu Liang1, 2, Zhao Wenxiang1, 2, Zhou Huawei1, 2
1. School of Electrical and Information Engineering Jiangsu University Zhenjiang 212013 China; 2. Jiangsu Key Laboratory of Drive and Intelligent Control for Electric Vehicle Zhenjiang 212013 China
Abstract：The fault-tolerant permanent magnet vernier (FTPMV) machine combines the advantages of high torque density of the permanent-magnet vernier machine and high reliability of the fault-tolerance permanent-magnet machine. Hence, it has become a hot research topic for experts and scholars. In order to study the operating performances of this kind of machine in low and high speed operation regions, the structure, modulation principle of magnetic fields and inductance characteristics of two five-phase machines are compared and analyzed in this paper. Additionally, the mathematical model of five-phase machines is deduced based on flux-weakening and the drive system is established according to the space vector pulse width modulation (SVPWM) control method. Based on the stage control strategy, in the low speed region, id = 0 control strategy is used. In the high speed region, a kind of flux-weakening control strategy is used and the flux-weakening characteristics of machines are studied importantly, in which the moment of flux-weakening is judged based on the difference between bus-bar voltage and back-EMFs. Moreover, by parameters calculation and simulations, it can be found that the new FTPMV machine possesses better flux-weakening capacity than the conventional FTPMV machine when they works on the condition of rated current. Finally, the theoretical analysis is verified by experimental results.
刘国海,杨欣宇,徐亮,赵文祥,周华伟. 五相永磁容错型游标电机弱磁特性研究[J]. 电工技术学报, 2017, 32(19): 52-61.
Liu Guohai, Yang Xinyu, Xu Liang, Zhao Wenxiang, Zhou Huawei. Research on Flux-Weakening Performances for Five-Phase Fault-Tolerant Permanent-Magnet Vernier Motors. Transactions of China Electrotechnical Society, 2017, 32(19): 52-61.
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2017, Vol. 32 
