The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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25 kW, 300 kHz High Step-Up Soft-Switching Converter for Next-Generation Fuel Cell Vehicles

차세대 연료전지 자동차용 25kW, 300kHz 고승압 소프트 스위칭 컨버터

  • Kim, Sunju (Dept. of Electrical & Information Engineering, Seoul National University of Science and Technology) ;
  • Tran, Hai Ngoc (Dept. of Electrical & Information Engineering, Seoul National University of Science and Technology) ;
  • Kim, Jinyoung (Dept. of Electrical & Information Engineering, Seoul National University of Science and Technology) ;
  • Kieu, Huu-Phuc (Dept. of Electrical & Information Engineering, Seoul National University of Science and Technology) ;
  • Choi, Sewan (Dept. of Electrical & Information Engineering, Seoul National University of Science and Technology) ;
  • Park, Jun-Sung (Electric Drive Research Center, Korea Automotive Technology Institute) ;
  • Yoon, Hye-Sung (Power Research Lab., YOUNGHWATECH Co.)
  • Received : 2021.09.09
  • Accepted : 2021.09.23
  • Published : 2021.12.31
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Abstract

This paper proposes a high step-up converter with zero-voltage transition (ZVT) cell for fuel cell electric vehicle. The proposed converter applies a ZVT cell to a dual floating output boost converter (DFOBC) so that not only the main switch but also the ZVT switch can achieve full-range soft switching. The current rating of the ZVT switch is 17% of the main switch. The proposed converter has high reliability in that no timing issue occurs. Therefore, online calculation is not required. The minimum turn-on time of the ZVT switch that guarantees soft switching at all loads and input/output voltage is obtained by analysis. In addition, the proposed DFOBC allows the use of a 650 V device even at 800 V output and has the advantage of being able to boost the voltage by 3.5 times with 0.56 duty. Planar coupled inductor with PCB winding was successfully implemented with the converter operated at 300 kHz. The 25 kW prototype achieves peak efficiency of 99% and power density of 63 kW/L.

Keywords

Acknowledgement

본 연구는 산업통상자원부와 한국산업기술진흥원의 "수소연료전지차 부품실용화 및 산업기반육성사업"으로 수행된 연구 결과입니다. (과제번호: P0000270)

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