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

The Korean Institute of Power Electronics (전력전자학회)
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A 3.3kW Bi-directional EV Charger with V2G and V2H function

V2G-V2H 기능을 갖는 3.3kW급 전기자동차용 양방향 충전기

  • Jung, Se-Hyung (Dept. of Electrical & Information Eng., Seoul Nat'l Univ. of Science and Technology) ;
  • Hong, Seok-Yong (SIGNETSYSTEMS INC.) ;
  • Park, Jun-Sung (Dept. of Electrical & Information Eng., Seoul Nat'l Univ. of Science and Technology) ;
  • Choi, Se-Wan (Dept. of Electrical & Information Eng., Seoul Nat'l Univ. of Science and Technology)
  • Received : 2014.09.29
  • Accepted : 2014.11.18
  • Published : 2015.02.20
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Abstract

This paper proposes a 3.3-kW bi-directional EV charger with V2G and V2H functions. The bi-directional EV charger consists of a DC-DC converter and a DC-AC inverter. The proposed EV charger is suitable for wide battery voltage control due to the two-stage configuration of the DC-DC converter. By employing a fixed-frequency series loaded resonant converter as the isolated DC-DC converter, zero-current-switching can be achieved regardless of battery voltage variation, load variation, and power flow. A 3.3-kW prototype of the proposed EV charger has been built and verified with experiments, and indicates a maximum efficiency of 94.39% and rated efficiency of 94.23%.

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References

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