A high power buck-boost DC/DC converter for use in the powertrains of hybrid cars is presented. A special digital control strategy is implemented that allows a smooth change between both energy transfer directions. Equipped with this feature the converter can realize the energy management in the electric powertrain. The advantages of the hybrid system are shown by a hybrid fuel cell research car as an example. Application oriented data and test results of the used DC/DC converters are given. Two prototypes of highly efficient 24 kW and 70 kW bidirectional DC/DC converters were developed and evaluated. The digital control provides full protection against overvoltage, overcurrent and overtemperature. By integrated liquid cooling - up to 85 deg C - and very low losses, a high power density up to 5 W/cm3 is achieved. Characterization data of the converter and measurements in the target application - a hybrid fuel cell car - are presented.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    High power buck-boost DC/DC converter for automotive powertrain applications


    Contributors:
    Eckhardt, B. (author) / März, M. (author) / Hofmann, A. (author) / Gräf, M. (author) / Ungethüm, J. (author)


    Publication date :

    2005


    Size :

    6 Seiten, 13 Bilder, 2 Tabellen, 3 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Boost-buck converter control system

    NAKAMURA MAKOTO / FUNADA MASASHI / MORII AKIYOSHI | European Patent Office | 2016

    Free access


    Improved power quality buck boost converter for SMPS

    Jayachandran, J. / Malathi, S. | BASE | 2019

    Free access

    Boost/complementary buck DC/DC converter for space applications

    Banfi, E. / Maranesi, P. / Volpi, G.F. | Tema Archive | 1989