In this paper a 100 kW buck-boost DC/DC converter for use in the powertrains of hybrid cars is presented. Since size and weight of the converter are of essential importance for this application, a target size of 4 liter was defined, resulting in a benchmark power density of 25 kW/dm3. Currently available silicon carbide Schottky diodes allow switching frequencies of up to 100 kHz when combined with ultrafast 600 V IGBTs. This switching frequency, however, is not sufficient to realize the necessary size reduction. A polyphase approach has been chosen therefore. Twelve phases shift the fundamental frequency of the input and output ripple voltage above one megahertz, resulting in a great size reduction of the passive components. The converter operates with a coolant temperature of up to 85 deg C without derating. An overview of the converter design is given as well as loss and efficiency calculations.


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    Titel :

    Automotive powertrain DC/DC converter with 25 kW/dm3 by using SiC diodes


    Beteiligte:
    Eckhardt, B. (Autor:in) / Hofmann, A. (Autor:in) / Zeltner, S. (Autor:in) / Maerz, M. (Autor:in)


    Erscheinungsdatum :

    2006


    Format / Umfang :

    6 Seiten, 15 Bilder, 2 Tabellen, 4 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




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