Flexible fault-tolerant topology for switched reluctance motor drives

Yihua Hu, Chun Gan, Wenping Cao, Jiangfeng Zhang, Wuhua Li, Stephen J. Finney

Research output: Contribution to journalArticlepeer-review


Switched reluctance motor (SRM) drives are one competitive technology for traction motor drives. This paper proposes a novel and flexible SRM fault-tolerant topology with fault diagnosis, fault tolerance, and advanced control functions. The converter is composed of a single-phase bridge and a relay network, based on the traditional asymmetrical half-bridge driving topology. When the SRM-driving system is subjected to fault conditions including open-circuit and short-circuit faults, the proposed converter starts its fault-diagnosis procedure to locate the fault. Based on the relay network, the faulty part can be bypassed by the single-phase bridge arm, while the single-phase bridge arm and the healthy part of the converter can form a fault-tolerant topology to sustain the driving operation. A fault-tolerant control strategy is developed to decrease the influence of the fault. Furthermore, the proposed fault-tolerant strategy can be applied to three-phase 12/8 SRM and four-phase 8/6 SRM. Simulation results in MATLAB/Simulink and experiments on a three-phase 12/8 SRM and a four-phase 8/6 SRM validate the effectiveness of the proposed strategy, which may have significant economic implications in traction drive systems.
Original languageEnglish
Pages (from-to)4654-4668
Number of pages18
JournalIEEE Transactions on Power Electronics
Issue number6
Early online date7 Sept 2015
Publication statusPublished - Jun 2016

Bibliographical note

This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/


  • fault diagnosis
  • fault tolerance
  • switched reluctance motor
  • traction motor drive


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