Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Fault diagnosis and fault-tolerant control of position sensors for switched reluctance motors

  • Jie Shao (College of Engineering, Qufu Normal University) ;
  • Longli Deng (College of Engineering, Qufu Normal University)
  • Received : 2024.11.04
  • Accepted : 2025.06.26
  • Published : 2026.04.20
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Abstract

Failure of the position sensor of a switched reluctance motor can lead to problems such as reduced motor output torque and abnormal motor operation. By analyzing the binary combination number of the position sensor output signal, a diagnostic method based on a specific fault state sequence is proposed. The proposed method compares three consecutive adjacent binary combination numbers of the position sensor output with a specific fault state sequence to realize fault diagnosis. Meanwhile, the rotor position angle relationship among the three-phase position signals, along with the calculation formula for updating the rotor position angle in real time based on the fault diagnosis results, is used to implement fault-tolerant control after the fault occurs. The proposed fault diagnosis and fault-tolerant method can accurately locate faulty position sensors and realize fault-tolerant control after a fault occurs. This ensures that the switched reluctance motor can still operate stably under faulty position sensor conditions. Experimental results verify the accuracy and effectiveness of the proposed method.

Keywords

Acknowledgement

This work was supported by Shandong Provincial Natural Science Foundation (Grant no. ZR2022ME136).

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