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

The Korean Institute of Power Electronics (전력전자학회)
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High Efficiency Power Conversion System for Battery-Ultracapacitor Hybrid Energy Storages

배터리-울트라커패시터 하이브리드 에너지 저장장치를 위한 고효율 전력변환 시스템

  • Yoo, Ju-Seung (Div. of Electronics Engineering, Chonbuk Nat'l University) ;
  • Choi, Woo-Young (Division of Electronics Engineering, Chonbuk Nat'l University)
  • Received : 2012.07.31
  • Accepted : 2012.10.25
  • Published : 2012.12.20
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Abstract

This paper proposes a high efficiency power conversion system for battery-ultracapacitor hybrid energy storages. The proposed system has only one bidirectional dc-dc converter for hybrid power source with batteries and ultracapacitors. The hybrid power source has bidirectional switching circuits for selecting one energy storage device. Bidirectional power flow between the energy storage device and high voltage capacitor can be controlled by one bidirectional converter. An asymmetrical switching method is applied to the bidirectional converter for high power efficiency. Switching power losses are reduced by zero-voltage switching of power switches. System operation and design considerations are presented. The experimental results are provided to verify the performance of the proposed system.

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References

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