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± 180° Discontinuous PWM for Single-Phase PWM Converter of High-Speed Railway Propulsion System

Author

Listed:
  • Min-Sup Song

    (Railroad Test & Certification Division, Korea Railroad Research Institute, Uiwang-si 16105, Korea)

  • In-Ho Cho

    (Smart Electrical & Signaling Division, Korea Railroad Research Institute, Uiwang-si 16105, Korea)

  • Jae-Bum Lee

    (Department of Railroad Electrical and Electronics Engineering, Korea National University of Transportation, Uiwang-si 16106)

Abstract

As high-capacity alternating current/direct current (ac/dc) power conversion systems, single-phase pulse-width modulation (PWM) converters used in high-speed railway propulsion systems adopt high-voltage Insulated-Gate Bipolar Transistors (IGBTs) as switching elements. Due to their high breakdown voltage characteristics, the switching dynamics are inferior to those of low-voltage IGBTs and switching losses are more dominant than conduction losses despite operating at relatively low switching frequencies of hundreds to several kHz. To solve this problem, this paper proposes ± 180° discontinuous PWM (DPWM) suitable for a single-phase circuit. With the simple addition of offset voltages, the proposed DPWM method can be implemented easily and switching losses can be reduced by half by clamping the switching legs of the H-bridge converter to the positive or negative dc rail during every half cycle. In addition, temperature deviation between the power stacks can be minimized by using selective application of clamping modes. The validity and effectiveness of the proposed DPWM are verified through simulations and experiments of a prototype converter.

Suggested Citation

  • Min-Sup Song & In-Ho Cho & Jae-Bum Lee, 2020. "± 180° Discontinuous PWM for Single-Phase PWM Converter of High-Speed Railway Propulsion System," Energies, MDPI, vol. 13(7), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1550-:d:337432
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    References listed on IDEAS

    as
    1. Masatoshi Uno & Masahiko Inoue & Yusuke Sato & Hikaru Nagata, 2018. "Bidirectional Interleaved PWM Converter with High Voltage-Conversion Ratio and Automatic Current Balancing Capability for Single-Cell Battery Power System in Small Scientific Satellites," Energies, MDPI, vol. 11(10), pages 1-12, October.
    2. Shao, Zeng-Zhen & Ma, Zu-Jun & Sheu, Jiuh-Biing & Gao, H. Oliver, 2018. "Evaluation of large-scale transnational high-speed railway construction priority in the belt and road region," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 117(C), pages 40-57.
    3. Alenka Hren & Franc Mihalič, 2018. "An Improved SPWM-Based Control with Over-Modulation Strategy of the Third Harmonic Elimination for a Single-Phase Inverter," Energies, MDPI, vol. 11(4), pages 1-20, April.
    4. Lin, Yatang, 2017. "Travel costs and urban specialization patterns: Evidence from China’s high speed railway system," Journal of Urban Economics, Elsevier, vol. 98(C), pages 98-123.
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