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

The Korean Institute of Power Electronics (전력전자학회)
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Performance of an SiC-MOSFET Based 11-kW Bi-directional On-board Charger

SiC-MOSFET 기반 11-kW급 양방향 탑재형 충전기 성능

  • Lee, Sang-Youn (Dept. of Electrical Engineering, Myongji University) ;
  • Lee, Woo-Seok (Dept. of Electrical Engineering, Myongji University) ;
  • Lee, Jun-Young (Dept. of Electrical Engineering, Myongji University) ;
  • Lee, Il-Oun (Dept. of Electrical Engineering, Myongji University)
  • Received : 2021.04.30
  • Accepted : 2021.06.29
  • Published : 2021.10.20
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Abstract

The design and performance of a SiC-MOSFET-based 11-kW bi-directional on-board charger (OBC) for electric vehicles is presented. The OBC consists of a three-phase two-level AC/DC converter and a CLLLC resonant converter. All the power devices are implemented with SiC-MOSFETs to reduce the conduction losses generated in the OBC, and the DC-link voltage is designed to track the level of battery voltage in the forward and reverse powering modes. As a result, the CLLLC resonant converter always runs at the switching frequency near the resonant frequency, resulting in high-efficiency operation at the maximum powering modes. As the DC-link voltage varies according to the battery voltage, the AC/DC converter in the proposed OBC adopts an adaptive DC-link voltage controller. The performance of the proposed 11-kW OBC is verified by a prototype converter with the following specifications: three-phase 60-Hz 380-V input, 11-kW capacity, and battery voltage range of 214-413-V, resulting in the conversion efficiency of over 95.0-% in the forward and reverse powering modes.

Keywords

Acknowledgement

본 연구는 산업통상자원부와 한국산업기술진흥원의 "국가혁신클러스터사업(P0015364_스택구동용 양방향 저전압 컨버터(BLDC) 개발)"의 지원을 받아 수행된 연구결과임.

References

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