Automotive powertrain DC/DC converter with 25 kW/dm3 by using SiC diodes
Automotive powertrain DC/DC converter with 25 kW/dm3 by using SiC diodes
- New search for: Eckhardt, B.
- New search for: Hofmann, A.
- New search for: Zeltner, S.
- New search for: Maerz, M.
- New search for: Eckhardt, B.
- New search for: Hofmann, A.
- New search for: Zeltner, S.
- New search for: Maerz, M.
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.
Document information
Automotive powertrain DC/DC converter with 25 kW/dm3 by using SiC diodes
2006
6 Seiten, 15 Bilder, 2 Tabellen, 4 Quellen
Conference paper
Storage medium
English
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