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

The Korean Institute of Power Electronics (전력전자학회)
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Bidirectional LLC-LC Resonant Converter With Notch Filter

노치 필터 적용 양방향 LLC-LC 공진컨버터

  • Jang, Ki-Chan (Dept. of Electrical & Electronics Engineering, Jeonju University) ;
  • Kim, Eun-Soo (Dept. of Electrical & Electronics Engineering, Jeonju University)
  • Received : 2021.08.25
  • Accepted : 2021.10.05
  • Published : 2021.12.31
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Abstract

In this paper, bidirectional LLC-LC resonant DC-DC converter with notch filters in the primary side of resonant circuits is proposed. Even if resonant capacitors are used on the primary and secondary sides, the proposed converter can operate with the high gain characteristics of the LLC resonant converter without mutual coupling of resonant capacitors, regardless of the direction of power flow. In addition, by applying notch filters, the proposed converter can operate with a wider gain control range and can cope with overload and short circuit. The analysis and operating characteristics of the proposed bidirectional LLC-LC resonant converter are investigated. A 3.3 kW prototyped bidirectional LLC-LC resonant converter connected to 750 VDC buses is designed and tested to verify the validity and applicability of this proposed converter.

Keywords

Acknowledgement

본 연구는 2018년 정부(교육부)의재원으로한국연구재단의 지원을 받아 수행된중견연구사업임.(NRF-2018R1A2B6008925)

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