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

The Korean Institute of Power Electronics (전력전자학회)
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Development of DC/DC Converters and Actual Vehicle Simulation Experiment for 150 kW Class Fuel-cell Electric Vehicle

150kW급 수소연료전지 차량용 DC/DC 컨버터 개발 및 실차모사 실험

  • Kim, Sun-Ju (Dept. of Electrical & Information Engineering, Seoul National University of Science and Technology) ;
  • Jeong, Hyeonju (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) ;
  • Cho, Jun-Ho (Electric Drive Research Center, Korea Automotive Technology Institute) ;
  • Jeon, Yujong (Electric Drive Research Center, Korea Automotive Technology Institute) ;
  • Park, Jun-Sung (Electric Drive Research Center, Korea Automotive Technology Institute) ;
  • Yoon, Hye-Sung (Power Research Lab., Younghwa Tech. Co.)
  • Received : 2021.11.15
  • Accepted : 2021.11.17
  • Published : 2022.02.20
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Abstract

This paper proposes a power system that includes a 120k W fuel cell DC-DC converter (FDC) and 30 kW bidirectional DC-DC converter (BHDC) for a 150 kW fuel-cell vehicle. With a high DC link voltage of 800 V, the efficiency and power density of the power electronic components are improved. Through the modular design of FDC and BHDC, electric components are shared, resulting in reduced mass production costs. The switching frequency of 30 kHz of full SiC devices and optimal design of coupled inductor reduce the volume, achieving a power density of 8.3 kW/L. Furthermore, a synergetic operation strategy using variable limiter control of FDC and BHDC was proposed to efficiently operate the fuel cell vehicle considering the fuel cell stack efficiency according to the load. Finally, the performance of the prototype was verified by Highway Fuel Economy Driving Schedule testing, EMI test, and the linked operation between FDC and BHDC. The full load efficiencies of the FDC and BHDC prototypes are 98.47% and 98.74%, respectively.

Keywords

Acknowledgement

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

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