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

The Korean Institute of Power Electronics (전력전자학회)
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A New Voltage Balancer With Bidirectional DC-DC Converter Function for EV Charging Station

전기자동차 충전소용 양방향 DC-DC 컨버터 기능을 갖는 전압 밸런서

  • Nam, Hyun-Taek (Dept. of Electrical Eng., Kyungpook National University) ;
  • Kim, Sanghun (Dept. of Electrical Eng., Kyungpook National University) ;
  • Cha, Honnyong (School of Energy Eng., Kyungpook National University) ;
  • Kim, Heung-Geun (Dept. of Electrical Eng., Kyungpook National University)
  • Received : 2018.06.26
  • Accepted : 2018.07.10
  • Published : 2018.10.20
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Abstract

This study proposes a new voltage balancer with bidirectional DC-DC converter function. The proposed balancer can serve as a voltage balancer and a bidirectional DC-DC converter. Thus, the balancer can be applied to battery management systems or fast chargers in electric vehicles (EVs) charging stations while balancing bipolar DC bus voltages. The proposed system has unlimited voltage balancing range unlike the conventional voltage balancing control using a three-level DC-DC converter. A comparison of the voltage balancing range between the proposed and conventional scheme is explored to confirm this superiority. Simulation and experimental results are provided to validate the effectiveness of the proposed system.

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References

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