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Leg Conversion Method for the Continuous Control of a Railway Vehicle Propulsion Inverter

Author

Listed:
  • Jongyong Choi

    (Department of Electrical Engineering, Gachon University, Seongnam-si 13120, Republic of Korea)

  • Gildong Kim

    (Korea Railroad Research Institute, Uiwang-si 16105, Republic of Korea)

  • Hyunjae Lee

    (Department of Electrical Engineering, Gachon University, Seongnam-si 13120, Republic of Korea)

  • Gunbok Lee

    (Korea Railroad Research Institute, Uiwang-si 16105, Republic of Korea)

  • Jingeun Shon

    (Department of Electrical Engineering, Gachon University, Seongnam-si 13120, Republic of Korea)

Abstract

In this study, we propose a whole-leg scheme for the continuous control of a railway vehicle propulsion inverter. The three-leg method is commonly used to obtain the output AC power from the input DC voltage in a railway vehicle propulsion inverter. When the power semiconductor of an inverter operating in a three-leg manner fails, a problem occurs in the power supply. Therefore, this study proposes a method that automatically converts into the two-leg method without replacing the power semiconductor when it fails while the inverter is driven with the three-leg method. This leg conversion method can prevent problems in supplying power by converting the power that can be obtained from an inverter operating with the three-leg method into that obtained from an inverter operating with the two-leg method. In addition, to verify the effectiveness of the leg conversion method, a demonstrative experiment was conducted after a simulation, and an actual inverter was fabricated. Consequently, the experimental results confirmed that in an inverter operating with the three-leg method, even if the power semiconductor failed, it could be converted for operation with the two-leg method to supply power normally.

Suggested Citation

  • Jongyong Choi & Gildong Kim & Hyunjae Lee & Gunbok Lee & Jingeun Shon, 2023. "Leg Conversion Method for the Continuous Control of a Railway Vehicle Propulsion Inverter," Energies, MDPI, vol. 16(14), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:14:p:5474-:d:1197284
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    References listed on IDEAS

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    1. Zamora, Ramon & Srivastava, Anurag K., 2010. "Controls for microgrids with storage: Review, challenges, and research needs," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(7), pages 2009-2018, September.
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