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A Novel Structure of Variable Inductance High-Frequency Transformer for Power Level Enhancement in Dual-Active-Bridge Converters

Author

Listed:
  • Cheol-Woong Choi

    (Department of Electrical Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
    Smartenergy Institute, Sunchon National University, Suncheon 57922, Republic of Korea)

  • Jae-Sub Ko

    (Department of Electrical Engineering, Gangneung-Wonju National University, Wonju 26403, Republic of Korea)

  • Keun-Yong Yoon

    (Department of Electrical Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
    Smartenergy Institute, Sunchon National University, Suncheon 57922, Republic of Korea)

  • Yong-Un Park

    (Energy Innovative Industry R&D Department, Green Energy Institute, Mokpo 58656, Republic of Korea)

  • Yun-Soo Kang

    (Department of Mathematics Education, Sunchon National University, Suncheon 57922, Republic of Korea)

  • Dae-Kyong Kim

    (Department of Electrical Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
    Smartenergy Institute, Sunchon National University, Suncheon 57922, Republic of Korea)

Abstract

This study presents a novel structure proposal of a variable inductance high-frequency transformer for enhancement power level of a dual-active-bridge (DAB) converter. The DAB converter is a solid-state transformer (SST) that requires high efficiency, power density, flexibility, and stability. Variable inductance facilitates achieving and extending maximum power levels. The proposed method adjusts the inductance based on the core insertion conditions of the transformer used in the DAB converter without requiring an additional inductor. The method was verified by analyzing the variable inductance characteristics of the transformer based on core insertion conditions via finite element analysis (FEA) and simulation and experiments within the variable inductance range.

Suggested Citation

  • Cheol-Woong Choi & Jae-Sub Ko & Keun-Yong Yoon & Yong-Un Park & Yun-Soo Kang & Dae-Kyong Kim, 2025. "A Novel Structure of Variable Inductance High-Frequency Transformer for Power Level Enhancement in Dual-Active-Bridge Converters," Energies, MDPI, vol. 18(5), pages 1-12, February.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:5:p:1043-:d:1596401
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    References listed on IDEAS

    as
    1. Sarah Saeed & Ramy Georgious & Jorge Garcia, 2020. "Modeling of Magnetic Elements Including Losses—Application to Variable Inductor," Energies, MDPI, vol. 13(8), pages 1-19, April.
    2. Babak Khanzadeh & Torbjörn Thiringer & Mohammad Kharezy, 2023. "Multilevel Dual Active Bridge Leakage Inductance Selection for Various DC-Link Voltage Spans," Energies, MDPI, vol. 16(2), pages 1-18, January.
    3. Marek Turzyński & Serafin Bachman & Marek Jasiński & Szymon Piasecki & Marek Ryłko & Huang-Jen Chiu & Shih-Hao Kuo & Yu-Chen Chang, 2022. "Analytical Estimation of Power Losses in a Dual Active Bridge Converter Controlled with a Single-Phase Shift Switching Scheme," Energies, MDPI, vol. 15(21), pages 1-23, November.
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