Bidirectional interleaved current-fed resonant converter with reduced size of output filter for Fuel cell electric vehicles -출력필터의 크기를 줄인 연료전지 자동차용 양방향 인터리브드 전류원 공진형 컨버터 author Moon Dong-ok=

 

Bidirectional interleaved current-fed resonant converter with reduced size of output filter for FCEV 출력필터의 크기를 줄인 연료전지 자동차용 양방향 인터리브드 전류원 공진형 컨버터 

 Author Moon Dong-ok 

Issue Seoul: Seoul National University of Science and Technology, 2015 

 Dissertation Thesis (Master's) -- Department of Electrical and Computer Engineering, Graduate School of Seoul National University of Science and Technology 2015 Year of issue 2015

ABSTRACT 

 Recently, eco-friendly cars such as an Electric Vehicles (EV), Hybrid Electric Vehicles (HEV) and Plug In Hybrid Electric Vehicles (PHEV) are attracting increasing attention as a solution of environ-mental pollution, global warming and exhaustion of fossil fuels. The low voltage dc/dc converter (LDC) provides power to 12V loads such as the head lamps, wiper blade motor, electronic power steering (EPS), radio system etc. and charges a 12V auxiliary battery from a high voltage battery(200~400V). This application requires an efficient (usually, higher than 90%), compact and light weight dc/dc converter. Also, due to safety and high step down conversion ratio galvanic isolation is generally required. This study proposes a bi-directional interleaved current-fed resonant converter (CRC) with reduced size of the output filter for a fuel cell electric vehicle. The proposed CRC achieves zero-current switching turn on and off of switches and diodes and makes ripple current of the output capacitor theoretically zero. As a result, the cost and volume of the output capacitor are significantly reduced. The two-stage power conversion technique is also applied for wide input and output voltage range operations. A 2kW prototype of the proposed converter is built and tested to verify the validity of the proposed operation

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