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The bearing current issue generated during the operation of switched reluctance motor (SRM) has a significant impact on the performance and lifespan of the motors. This paper aims to delve into the mechanism of bearing current generation in SRM, innovatively establishing an equivalent circuit model specific to SRM with an asymmetric half-bridge circuit as the power converter. Additionally, finite element analysis is employed to determine the key coupling capacitance values in the bearing current equivalent circuit model. Furthermore, this paper analyzes the primary factors influencing bearing current, including motor size parameters, power circuit parameters, and operating conditions of the motor. Based on these analytical results, several methods to suppress the bearing current in SRM are proposed.

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Investigation on Bearing Currents Issues of Switched Reluctance Motors and Improvement Strategies

  • 会议论文

  • 发表日期：

    2025年

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  • He Yi,
  • Yang Shanshan,
  • Guan Minjun,
  • Liu Chuang

摘要

The bearing current issue generated during the operation of switched reluctance motor (SRM) has a significant impact on the performance and lifespan of the motors. This paper aims to delve into the mechanism of bearing current generation in SRM, innovatively establishing an equivalent circuit model specific to SRM with an asymmetric half-bridge circuit as the power converter. Additionally, finite element analysis is employed to determine the key coupling capacitance values in the bearing current equivalent circuit model. Furthermore, this paper analyzes the primary factors influencing bearing current, including motor size parameters, power circuit parameters, and operating conditions of the motor. Based on these analytical results, several methods to suppress the bearing current in SRM are proposed.