Splitting Inductance Tuning Method to Eliminate High Frequency Oscillation in Dual Active Bridge Converter

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    Abstract

    There is a growing trend towards operating higher frequency in dual active bridge (DAB) converters to achieve higher power density. At the meantime, the high frequency oscillation (HFO) problem introduced by the parasitic components of the transformer and high dvldt of the ac link excitation voltage becomes detrimental. Matching the oscillation frequency with the zero crossing points (ZCP) of the DAB dvldt excitation has been proven effective to eliminate the HFO problem. In this paper, a splitting inductance tuning method is proposed to adjust the circuit frequency characteristic and place the lowest impedance path at the ZCP frequency, thus eliminating the HFO. Theoretical analysis is given along with the experimental results from a 1 MHz Gallium Nitride (GaN) based DAB converter prototype.
    Original languageEnglish
    Title of host publicationProceedings of 2021 IEEE Energy Conversion Congress and Exposition
    PublisherIEEE
    Publication date2021
    Pages2930-2934
    ISBN (Print)978-1-7281-6128-0
    DOIs
    Publication statusPublished - 2021
    Event2021 IEEE Energy Conversion Congress and Exposition - Vancouver, Canada
    Duration: 10 Oct 202114 Oct 2021

    Conference

    Conference2021 IEEE Energy Conversion Congress and Exposition
    Country/TerritoryCanada
    CityVancouver
    Period10/10/202114/10/2021

    Keywords

    • Dual active bridge
    • High frequency oscillation
    • Splitting inductance tuning method
    • Gallium nitride

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