Comparative Analysis and Optimization of Power Loss Based on the Isolated Series/Multi Resonant Three-Port Bidirectional DC-DC Converter

Bo Chen, Ping Wang, Yifeng Wang, Wei Li, Fuqiang Han and Shuhuai Zhang
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Bo Chen: School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China
Ping Wang: School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China
Yifeng Wang: School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China
Wei Li: School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China
Fuqiang Han: School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China
Shuhuai Zhang: School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China

Energies, 2017, vol. 10, issue 10, 1-26

Abstract: Based on the loss distribution and efficiency analysis, a comparative study between a series resonant three-port bidirectional DC-DC converter (SR-TBC) and a multi-resonant three-port bi-directional DC-DC converter (MR-TBC) is reported here. By using the Fourier equivalent analysis method in hand, the resonant current, switching current expressions, zero voltage soft switching (ZVS) conditions of MR-TBC and SR-TBC are deduced. Besides, in consideration of efficiency and soft switching aspects, the loss models of main power components and resonant elements are integrated and optimized for both topologies. Their loss distributions are established, and the different effects derived from the adoption of SiC MOSFET and Si MOSFET on the converter efficiency are discussed. Finally, to verify the theoretical analyses, comparative experiments under diverse load states are conducted based on the prototypes of the MR-TBC and SR-TBC. The obtained results demonstrate that the MR-TBC successfully broadens the ZVS range and thus achieves higher efficiency along the entire load range.

Keywords: bi-directional DC-DC converter; three-port converter; soft switching; multi-resonant converter; loss distribution; SiC MOSFET (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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