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Power Device Temperature-Balancing Control Method for a Phase-Shift Full-Bridge Converter

Author

Listed:
  • Jun-Mo Kim

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea)

  • Jeong Lee

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea)

  • Kyung Ryu

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea)

  • Chung-Yuen Won

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea)

Abstract

In this paper, a switching method is proposed for power device temperature-balancing in a phase-shift full-bridge (PSFB) converter. PSFB is commonly used for applications that require high efficiency, because a zero-voltage switching (ZVS) operation is possible on the primary-side. In PSFB, the circulation current complicates ZVS under a light-load condition, which generates heat. Meanwhile, the heat generated in PSFB creates a temperature deviation between the lagging leg and the leading leg, which shortens the lifetime of the power device, thereby reducing system reliability and efficiency. To solve this problem, previous studies applied a pulse-width modulation (PWM) switching method for light and medium loads, and a phase-shift switching method for the region where ZVS is possible. Although this method has the advantage of easy control, the maximum temperature of the legs of the PSFB increases with medium loads. In this paper, a temperature-balancing algorithm—a temperature-balance control—is proposed to decrease the leg temperature using switching based on position exchanges of the leading leg and lagging leg along with PWM switching. Temperature-balance control minimizes leg temperature deviation under light load conditions. The proposed control method provides a minimum temperature difference between the two legs and high efficiency.

Suggested Citation

  • Jun-Mo Kim & Jeong Lee & Kyung Ryu & Chung-Yuen Won, 2020. "Power Device Temperature-Balancing Control Method for a Phase-Shift Full-Bridge Converter," Energies, MDPI, vol. 13(7), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1623-:d:340255
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    References listed on IDEAS

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    1. Bor-Ren Lin, 2019. "Implementation of a Parallel-Series Resonant Converter with Wide Input Voltage Range," Energies, MDPI, vol. 12(21), pages 1-18, October.
    2. Manuel Escudero & Matteo-Alessandro Kutschak & David Meneses & Noel Rodriguez & Diego P. Morales, 2019. "A Practical Approach to the Design of a Highly Efficient PSFB DC-DC Converter for Server Applications," Energies, MDPI, vol. 12(19), pages 1-36, September.
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    Cited by:

    1. Kornel Wolski & Piotr Grzejszczak & Marek Szymczak & Roman Barlik, 2021. "Closed-Form Formulas for Automated Design of SiC-Based Phase-Shifted Full Bridge Converters in Charger Applications," Energies, MDPI, vol. 14(17), pages 1-25, August.

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