Sensorless Fault-tolerant Control of a Nine-phase Permanent Magnet Synchronous Motor Based on Axes Transformation Under Open-circuited Fault

被引：0
|
作者：
Liu X. [1 ]
Zheng X. [1 ]
Zhang X. [1 ]
Wang H. [2 ]
Jin S. [3 ]
Wu X. [1 ]
机构：
[1] College of Electrical Engineering, Qingdao University, Shandong Province, Qingdao
[2] College of Automation, Qingdao University, Shandong Province, Qingdao
[3] Key Laboratory of Special Machine and High Voltage Apparatus, Ministry of Education, Shenyang University of Technology, Liaoning Province, Shenyang
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2024年 / 44卷 / 05期
基金：
中国国家自然科学基金;
关键词：
axes transformation; fault-tolerant control; multi-phase PMSM; position sensorless control;
D O I：
10.13334/j.0258-8013.pcsee.222767
中图分类号：
学科分类号：
摘要：
When open-circuit faults occur in the multi-phase permanent magnetic synchronous motor (PMSM), the current distortion and internal parameters variation of motor cause unpredictable disturbances to the system, which brings a challenge to the stable sensorless operation. To realize the online transition of fault tolerant control, this paper proposes a sensorless fault tolerant strategy of the multi-phase PMSM based on axes transformation. First, the reducing-order decoupled model of the postfault multi-phase PMSM is established using axes transformation. And postfault currents are refactored to guarantee the maximum torque output. The modeling approach applies to arbitrary open-circuit faults of the multi-phase PMSM. Also, the obtained mathematical model and current references would not vary with fault phase locations. On this basis, the modified sliding mode observer is established by the reducing-order decoupled model based on axes transformation, which improves the accuracy of rotor position estimation in the sensorless fault tolerant system. Finally, the effectiveness of the proposed control strategy is verified by open-circuit fault tolerant experiments with a 9 kW nine-phase PMSM. ©2024 Chin.Soc.for Elec.Eng.
引用
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页码：2027 / 2036
页数：9
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