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Junction Temperature Control of a Traction Inverter Based on Three-Level Active Neutral Point-Clamping

Author

Listed:
  • Haitao Liu

    (The School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China
    CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd., Zhuzhou 412000, China)

  • Sen Wang

    (CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd., Zhuzhou 412000, China)

  • Liang Hu

    (CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd., Zhuzhou 412000, China)

  • Ling Feng

    (CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd., Zhuzhou 412000, China)

  • Yue Wang

    (CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd., Zhuzhou 412000, China)

  • Chaoqun Xiang

    (The School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China)

Abstract

In this study, we propose an active junction temperature control method specifically tailored for traction inverters based on active neutral point-clamped (ANPC) three-level topology. This approach not only enables real-time junction temperature equalization across switching devices, but also minimizes switching losses while preserving synchronous modulation. The methodology begins with a detailed formulation of the loss quantification model for ANPC inverters, establishing the relationship between predicted losses and switching vectors. Building on this foundation, we develop a loss equalization modulation control strategy featuring closed-loop loss control. The effectiveness and practicality of the proposed control method are rigorously validated using simulations and low-power experimental testing, demonstrating its potential to enhance both the reliability and efficiency of traction inverters.

Suggested Citation

  • Haitao Liu & Sen Wang & Liang Hu & Ling Feng & Yue Wang & Chaoqun Xiang, 2025. "Junction Temperature Control of a Traction Inverter Based on Three-Level Active Neutral Point-Clamping," Energies, MDPI, vol. 18(9), pages 1-16, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:9:p:2241-:d:1644533
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