Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Three-phase 11 kW on-board charger with single-phase reverse function

  • Mun, Seung-Hwan (Department of Electrical Engineering, Myong-Ji University) ;
  • Choi, Seung-Won (Department of Electrical Engineering, Myong-Ji University) ;
  • Hong, Dae-Young (Department of Electrical Engineering, Myong-Ji University) ;
  • Kong, So-Jeong (Department of Electrical Engineering, Myong-Ji University) ;
  • Lee, Jun-Young (Department of Electrical Engineering, Myong-Ji University)
  • Received : 2021.10.06
  • Accepted : 2022.04.28
  • Published : 2022.08.20
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Abstract

This paper presents an 11 kW bidirectional on-board charger (OBC) design method with a single-phase discharge mode. The proposed OBC comprises an inverter, bidirectional LLC resonant converter, and buck converter. Different from the conventional bidirectional CLLLC resonant converter, power is controlled using a buck converter during reverse operation; therefore, considering the reverse gain when designing the LLC resonant converter is unnecessary. In addition, because the proposed method is designed by optimizing the forward direction, it can freely select a switching frequency, and the size of the magnetic components can be reduced, improving the power density. The validity of the proposed circuit is verified via a prototype OBC, with a grid voltage of 3 phase 380 VAC and a battery voltage of 270-464 V.

Keywords

Acknowledgement

This work was supported by the Technology Innovation funded by the Ministry of Trade, Industry and Energy (MOTIE, Korea) (Grant 20010938) and the Korea Agency for Infrastructure Technology Advancement(KAIA) grant funded by the Ministry of Land, Infrastructure, and Transport (Grant 21HCLP-C162885-01)

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