Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Design of a fault-tolerant system for a multi-motor drive with multiple inverter leg faults

  • Song, Yujin (Key Laboratory of Image Processing and Intelligent Control, Ministry of Education, School of Artificial Intelligence and Automation, Huazhong University of Science and Technology) ;
  • Zhao, Jin (Key Laboratory of Image Processing and Intelligent Control, Ministry of Education, School of Artificial Intelligence and Automation, Huazhong University of Science and Technology) ;
  • Sun, Jiajiang (Key Laboratory of Image Processing and Intelligent Control, Ministry of Education, School of Artificial Intelligence and Automation, Huazhong University of Science and Technology)
  • Received : 2022.01.11
  • Accepted : 2022.06.17
  • Published : 2022.11.20
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Abstract

A novel fault-tolerant system for a multi-motor drive with one-leg, two-leg, and secondary faults is designed in this study. Fault tolerance is realized from pre-fault to post-fault via a topology reconstruction scheme and an integrated control law. The scheme develops a reconstructible topology and its reconstruction algorithm. The multi-motor drive can be reconstructed into appropriate tolerant topologies on the basis of the diagnosis results. The control law based on the predictive torque control method is universal under any topology by designing a unified voltage vector model and an optimal switching state decision. The proposed system can cope with more types of faults and effectively switch from a healthy state to a fault-tolerant state under any fault. The effectiveness and performance of the fault-tolerant system are verified and demonstrated by simulation and experiment results.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation of China under grant nos. 62073147 and 61573159.

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