An Efficient Voltage Step-up/down Partial Power Converter (SUD-PPC) using Wide Bandgap devices

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    Abstract

    This paper proposed a novel topology for stepup/down converter based on the concept of partial power processing, which improves efficiency as well as power density. The unified modulation strategy achieves the auto transition between two operating modes without requiring any additional control. The operating principle is analyzed in detail, from which it is found that diode reverse recovery of Si MOSFETs reduces the voltage regulation range in step-down operation mode. Therefore, SiC MOSFET is employed in the high voltage side to avoid duty cycle loss. The SPICE simulations based on the SiC and Si devices have been built, and the simulation results verify the effect of using SiC devices. A 400V prototype based on SiC MOSFET has been built. Measurement results confirm the high efficiency in overall voltage range, and the maximum efficiency exceeds 99%.
    Original languageEnglish
    Title of host publicationProceedings of IEEE Workshop on Wide Bandgap Power Devices and Applications
    PublisherIEEE
    Publication date2021
    Pages264-269
    ISBN (Print)9781665418515
    DOIs
    Publication statusPublished - 2021
    EventIEEE Workshop on Wide Bandgap Power Devices and Applications in Asia - Virtual event, Wuhan, China
    Duration: 25 Aug 202127 Aug 2021
    https://wipda-asia2021.aconf.org/

    Conference

    ConferenceIEEE Workshop on Wide Bandgap Power Devices and Applications in Asia
    LocationVirtual event
    Country/TerritoryChina
    CityWuhan
    Period25/08/202127/08/2021
    Internet address

    Keywords

    • Step-up/down voltage regulation
    • Partial power processing
    • Unified modulation strategy
    • SiC devices

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