High Efficiency Bidirectional DC-DC Converter with Wide Input and Output Voltage Ranges for Battery Systems
Conference: PCIM Europe 2015 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/19/2015 - 05/20/2015 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2015
Pages: 8Language: englishTyp: PDF
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Authors:
Yu, Zhe; Kapels, Holger (Fraunhofer Institute for Silicon Technology (ISIT), Fraunhofer Application Center Power Electronics for Renewable Energy Systems, Steindamm 94, 20099 Hamburg, Germany)
Hoffmann, Klaus F. (Helmut Schmidt University, Holstenhofweg 85, 22043 Hamburg, Germany)
Abstract:
This paper presents a high efficiency bidirectional DC-DC converter for the integration of battery systems to DC-link. The proposed converter adopts the non-inverting buck-boost topology that enables wide-range voltage conversion. Furthermore, a new hybrid control scheme for achieving highly efficient power conversion is introduced. A 2.5 kW hardware prototype based on SiC-MOSFETs is fabricated and tested for performance verification. Experimental results show that the prototype achieves an efficiency of more than 97% at 4% load and an efficiency of more than 99% around the rated operating point.