Partial-Power Converter Topology of Type II for Efficient Electric Vehicle Fast Charging

Sebastian Rivera, Julian Rojas, Samir Kouro, Peter W. Lehn, Ricardo Lizana, Hugues Renaudineau, Tomislav Dragicevic

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    The increasing power levels handled by electric vehicle dc fast chargers will impose additional challenges to the switching devices in order to cope with the efficiency requirements. A cost-effective alternative to achieve highly efficient power conversion is through the partial-power conversion concept. This paper validates the advantages of a step-down Type II partial-power converter (PPC), based on the phase-shifted fullbridge converter, for EV Fast Chargers. By exploiting the reduced voltage range of an EV battery pack along with the reduced power ratio for a Type II PPC, an extremely efficient charging process can be achieved. The concept is validated with the development of a 7 kW demonstrator, hence realistic efficiency measurements are obtained. Results indicate the effectiveness of charging a battery by merely handling 13.32% of the power provided to it, with a peak efficiency of 99.11%
    Original languageEnglish
    JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
    Issue number6
    Pages (from-to)7839 - 7848
    Publication statusPublished - 2022


    • Battery charging
    • DC-DC power conversion
    • Fast charger
    • High Efficiency
    • Partial-power converters (PPCs)


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