Abstract
To further improve the reliability of wheel-driven electric vehicles, this paper studies the fault-tolerant control operation of a five-phase permanent magnet synchronous hub motor (PMSHM). A fault-tolerant scheme based on model predictive current control (MPCC) is proposed for the five-phase PMSHM under single-phase open-circuit fault and two-phase open-circuit fault operation. In the implementation of this scheme, the five-phase PMSHM model during fault operation is discussed, and the coordinate transformation matrices for single-phase fault, adjacent two-phase fault and non-adjacent two-phase fault are derived respectively. Through further analysis, the offset voltage vector at the time of open-circuit fault can be obtained, and the newly obtained voltage vector can be used as the candidate set for model predictive control. The MPCC method combines duty cycle control and the vector preselection method. Compared with the traditional MPCC scheme, the improved MPCC scheme not only reduces the computation time but also enhances the steady-state performance of the control scheme. Finally, it is verified that the proposed fault-tolerant scheme based on MPCC can effectively address the difference in open-loop fault operation and improve the reliability of the hub drive system.
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Acknowledgements
This work was supported in part by the Key Research and Development Program of Jiangsu Province (BE2023052), the Changzhou Science and Technology Support Program (Industry) under Project CE20220007, the Opening Foundation of Key Laboratory of Advanced Manufacture Technology for Automobile Parts, Ministry of Education [No. 2022 KLMT02], and the Postgraduate Research and Practice Innovation Program of Jiangsu Province (KYCX21_3331).
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Li, T., Yao, M. & Sun, X. Fault-Tolerant Control of Five-Phase Permanent Magnet Synchronous Hub Motor Based on Improved Model Predictive Current Control. J. Electr. Eng. Technol. 19, 247–257 (2024). https://doi.org/10.1007/s42835-023-01693-8
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DOI: https://doi.org/10.1007/s42835-023-01693-8