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    Bidirectional Converters (DC-DC Focus)

    D02.10 - All-Switches ZVS via Minor Frequency Perturbation in Bidirectional Phase-Shift Full-Bridge Converters

    Thursday, March 26, 2026
    12:00 PM - 1:45 PM CT
    Location: Poster 2
    To achieve high power density and efficiency in an isolated bidirectional DC/DC converter, this paper employs a bidirectional phase-shift full bridge (PSFB). Conventional PSFBs realize ZVS only on the primary switches, while the secondary switches incur appreciable turn-on loss due to high resonant voltage. This paper analyzes the secondary side switching loss and proposes a minor frequency perturbation that extends ZVS to the secondary switches, enabling all switch ZVS. The operating principle is derived, a benchmark design is presented for comparison with prior methods, and preliminary experiments confirm the feasibility and effectiveness of the proposed technique.