Most of the present EV on-board chargers utilize a three-stage design, e.g., AC/DC rectifier, DC to high-frequency AC inverter, and AC to DC rectifier, which limits the wall-to-battery efficiency to ∼94%. To further increase the efficiency and power density, a matrix converter is an excellent candidate directly converting grid AC to high-frequency AC thereby saves one stage. However, its control complexity and the high cost of building the back-to-back switches are barriers its acceptance. Instead, this paper adopts the 650V E-mode GaN HEMTs to build a level-2 on-board charger using the indirect matrix topology. The input voltage is 80∼260VAC, the battery voltage is 200∼500VDC and the rated power is 7.2kW. Variable switching frequency is combined with phase-shift control to realize the zero-voltage switching. To further increase the system efficiency, four GaN HEMTs are paralleled to form one switching module with a novel gate-drive technology. The overall system efficiency is ∼98% and the power density is 3.3kW/L.


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    Titel :

    Design and Optimization of a 98%-Efficiency On-Board Level-2 Battery Charger Using E-Mode GaN HEMTs for Electric Vehicles


    Weitere Titelangaben:

    Sae Int. J. Alt. Power


    Beteiligte:
    Brown, Alan (Autor:in) / Bai, Hua (Autor:in) / Teng, Hui (Autor:in) / Lu, Juncheng (Autor:in) / McAmmond, Matt (Autor:in) / Tian, Qi (Autor:in)

    Kongress:

    SAE 2016 World Congress and Exhibition ; 2016



    Erscheinungsdatum :

    2016-04-05


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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