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Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs

Author

Listed:
  • Furkan Karakaya

    (METU PowerLab, Electrical and Electronics Engineering, Middle East Technical University, Ankara 06800, Turkey)

  • Özgür Gülsuna

    (METU PowerLab, Electrical and Electronics Engineering, Middle East Technical University, Ankara 06800, Turkey)

  • Ozan Keysan

    (METU PowerLab, Electrical and Electronics Engineering, Middle East Technical University, Ankara 06800, Turkey)

Abstract

There are trade-offs for each power converter design which are mainly dictated by the switching component and passive component ratings. Recent power electronic devices such as Gallium Nitride (GaN) transistors can improve the application range of power converter topologies with lower conduction and switching losses. These new capabilities brought by the GaN High Electron Mobility Transistors (HEMTs) inevitably changes the feasible operation ranges of power converters. This paper investigates the feasibility of Buck and Boost based bi-directional DC/DC converter which utilizes Quasi-Square-Wave (QSW) Zero Voltage Switching (ZVS) on GaN HEMTs. The proposed converter applies a high-switching frequency at high output power to maximize the power density at the cost of high current ripple with high frequency of operation which requires a design strategy for the passive components. An inductor design methodology is performed to operate at 28 A PP with a switching frequency of 450 kHz. In order to minimize the high ripple current stress on the output capacitors an interleaving is performed. Finally, the proposed bi-directional converter is operated at 5.4 kW with 5.24 kW/L or 85.9 W/in 3 volumetric power density with air-forced cooling. The converter performance is verified for buck and boost modes and full load efficiencies are recorded as 97.7% and 98.7%, respectively.

Suggested Citation

  • Furkan Karakaya & Özgür Gülsuna & Ozan Keysan, 2021. "Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs," Energies, MDPI, vol. 14(10), pages 1-23, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:10:p:2867-:d:555521
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    References listed on IDEAS

    as
    1. Ahmed H. Okilly & Namhun Kim & Jeihoon Baek, 2020. "Inrush Current Control of High Power Density DC–DC Converter," Energies, MDPI, vol. 13(17), pages 1-24, August.
    2. Marek Adamowicz & Janusz Szewczyk, 2020. "SiC-Based Power Electronic Traction Transformer (PETT) for 3 kV DC Rail Traction," Energies, MDPI, vol. 13(21), pages 1-30, October.
    3. Dai-Duong Tran & Sajib Chakraborty & Yuanfeng Lan & Mohamed El Baghdadi & Omar Hegazy, 2020. "NSGA-II-Based Codesign Optimization for Power Conversion and Controller Stages of Interleaved Boost Converters in Electric Vehicle Drivetrains," Energies, MDPI, vol. 13(19), pages 1-31, October.
    4. Abualkasim Bakeer & Andrii Chub & Dmitri Vinnikov & Argo Rosin, 2020. "Wide Input Voltage Range Operation of the Series Resonant DC-DC Converter with Bridgeless Boost Rectifier," Energies, MDPI, vol. 13(16), pages 1-18, August.
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