Research on Zero Voltage Switching Non-inductive Current Circulation Control of Bidirectional DC/DC Converter for Hybrid Energy Source System of Electric Vehicle

The hybrid energy source system (HESS) with batteries and super-capacitor can effectively prolong the cycle life of batteries in electric vehicles (EVs). In order to further highlight the advantages of HESS in improving EVs efficiency, The DC/DC converter in HESS should have the advantages of high e...

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Bibliographic Details
Published in:Journal of electrical engineering & technology 2021, 16(2), , pp.873-887
Main Authors: Wu, Xiaogang, Liu, Zhengxin, Du, Jiuyu, Yu, Boyang
Format: Article
Language:English
Subjects:
Electrical Engineering
Electrical Machines and Networks
Electronics and Microelectronics
Engineering
Instrumentation
Original Article
Power Electronics
전기공학
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Summary:The hybrid energy source system (HESS) with batteries and super-capacitor can effectively prolong the cycle life of batteries in electric vehicles (EVs). In order to further highlight the advantages of HESS in improving EVs efficiency, The DC/DC converter in HESS should have the advantages of high efficiency and fast response speed. Therefore, a soft-switching non-isolated buck-boost bidirectional DC/DC converter is applied to the HESS system of EVs in this paper. The converter has the advantages of being a simple circuit, a reduced number of components and can realize ZVS of all switches without an auxiliary circuit. In addition, a non-inductive current circulation control method is adopted in order to further improve the efficiency of the converter. The controller of the converter is designed based on small signal modeling, and an experimental prototype has been developed. The experimental results show that, compared to the inductive current circulation method, the non-inductive current circulation control method can effectively reduce the loss of the inductor, and the maximum efficiency of the converter is 92.8% in step-down mode and 93.2% in step-up mode.
ISSN:1975-0102
2093-7423
DOI:10.1007/s42835-020-00610-7