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An Isolated Bidirectional Soft-Switching DC-DC Converter for Wide Input/Output Voltage Range

Author

Listed:
  • Giorgio Spiazzi

    (Department of Information Engineering, University of Padova, 35131 Padova, Italy)

  • Leopoldo Rossetto

    (Department of Information Engineering, University of Padova, 35131 Padova, Italy)

  • Paolo Mattavelli

    (Department of Management and Engineering, University of Padova, 36100 Vicenza, Italy)

  • Ezio Gallo

    (Department of Management and Engineering, University of Padova, 36100 Vicenza, Italy)

  • Filip Cvejic

    (Department of Information Engineering, University of Padova, 35131 Padova, Italy)

Abstract

This paper presents the analysis and design of an isolated bidirectional DC-DC converter for applications where both input and output voltages may vary in a wide range. The proposed topology is derived from the integration of an isolated Current-Fed Dual-Active-Bridge (CF-DAB) stage with a Four-Switch Buck-Boost cell (4SBB), sharing one switching leg. Detailed design procedures are outlined for both CF-DAB and 4SBB stages, allowing to achieve Zero-Voltage turn-on of all devices while minimizing the inductor current RMS values. An optimized design of the CF-DAB coupled inductors allowed to achieve the desired leakage inductance value without the need for an additional magnetic component. Experimental results taken on a 5 kW prototype interfacing two voltage ports with V L ∈ [42 V, 72 V], V H ∈ [225 V, 435 V] validate the proposed design procedure.

Suggested Citation

  • Giorgio Spiazzi & Leopoldo Rossetto & Paolo Mattavelli & Ezio Gallo & Filip Cvejic, 2024. "An Isolated Bidirectional Soft-Switching DC-DC Converter for Wide Input/Output Voltage Range," Energies, MDPI, vol. 17(23), pages 1-21, December.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:23:p:6121-:d:1537008
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