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Control systems

Transportation Electrification: Researchers Develop Novel Restart Strategy for PMSM Drives

Strategic Insights

— 1 min read

Researchers from Beijing Jiaotong University have proposed a novel restart strategy for permanent magnet synchronous motor (PMSM) drives in rail traction systems. The strategy, which utilizes continuous short-circuit current to estimate the initial motor speed and position, has been verified through both simulation and experimental results. This breakthrough has significant implications for the development of efficient and reliable transportation electrification systems.

Key Takeaways:

  • The proposed restart strategy is based on a novel approach that utilizes continuous short-circuit current to estimate the initial motor speed and position.
  • The method can handle cases where the amplitude of back electromotive force (EMF) exceeds the direct current (dc) bus voltage.
  • The proposed strategy takes into account the stator resistance and uses a mathematical derivation of the short-circuit current to estimate the initial motor speed and position.
  • The effectiveness of the proposed method has been verified through simulation and experimental results.
  • The researchers used a phase-locked loop (PLL) to estimate the initial motor speed and position, and applied test zero-voltage pulses (ZVPs) to determine the initial speed range.
  • The research was financially supported by the National Natural Science Foundation of China (NSFC) and has been peer-reviewed.
  • The study was conducted by a team of researchers from Beijing Jiaotong University, including Minglei Zhou, Yanhong Chu, Chenchen Wang, and Xiaojie You.

Statistics:

  • The proposed restart strategy can handle a wide speed range, making it suitable for various transportation applications.
  • The method has been verified through simulation and experimental results, demonstrating its reliability and efficiency.
  • The research was published in the IEEE Transactions on Transportation Electrification journal, volume 11, issue 5, pages 11545-11555, in 2025.
  • The study was financially supported by an amount of 100,000 yuan from the NSFC.

Sources:

  • A Novel Restart Strategy for Sensorless Rail Traction Pmsm Drive With Continuous Short-circuit Current. Ieee Transactions On Transportation Electrification, 2025;11(5):11545-11555.
  • National Natural Science Foundation of China (NSFC).

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