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XIAO Huihui,LI Maoli,YANG Yi.Design of High Efficiency and High Power Density Vehicle-mounted Bidirectional Power Converter[J].JOURNAL OF POWER SUPPLY,2021,19(2):34-40
Design of High Efficiency and High Power Density Vehicle-mounted Bidirectional Power Converter
Received:February 21, 2019  Revised:February 18, 2021
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DOI:10.13234/j.issn.2095-2805.2021.2.34
Keywords:high efficiency and high power density  phase shift full-bridge zero voltage switch  single-phase full-bridge inverter  PWM rectifier  four-quadrant operation
Fund Project:Chongqing postgraduate research and innovation project (fund no. CYS18310)
        
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XIAO Huihui School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing , China;Chongqing Energy Internet Engineering Technology Research Center, Chongqing University of Technology, Chongqing , China xhh@cqut.edu.cn
LI Maoli School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing , China
YANG Yi School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing , China;Chongqing Energy Internet Engineering Technology Research Center, Chongqing University of Technology, Chongqing , China
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Abstract:
      A vehicle-mounted bidirectional power converter for charging and discharging electric vehicle batteries is designed. In the charging state, the PWM rectification technology is adopted at the front stage, and a zero voltage switch (ZVS) circuit is adopted at the rear stage, thus achieving high-efficiency voltage reduction transformation with electrical isolation. In the discharging state, a bi-directional DC-DC converter realizes voltage boost conversion, and a bi-directional AC-DC converter (as a single-phase full-bridge inverter) adopts voltage feedforward and the voltage current double closed-loop control strategy. This system adopts all-control device GaN to control the current and voltage switching, which can make the current and voltage operate in four positive and negative quadrants and realize the forward and reverse energy transfer in both directions. According to this scheme, a prototype with a switching frequency of 100 kHz and output power of 2 kW was designed, and test results show that this system can effectively realize the bidirectional energy flow and effectively improve the efficiency and power density, which verified the feasibility of the proposed scheme.
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