IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v15y2022i12p4471-d842702.html
   My bibliography  Save this article

Backward Step-Up Control Strategy for Bidirectional LLC Resonant Converter

Author

Listed:
  • Jingkai Niu

    (National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China)

  • Xuezhi Wu

    (National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China)

  • Yue Wang

    (National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China)

  • Long Jing

    (National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China)

  • Weige Zhang

    (National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China)

  • Yibin Tong

    (National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China)

Abstract

An LLC resonant converter has the advantages of simple structure and soft switching. It can enable bidirectional power transmission, but it is difficult to realize a normalized gain greater than one under backward mode (backward step-up mode). Cascaded dc/dc converters or topological changes can solve this problem, but additional switches and components are required and losses are added. Without changing the LLC resonant converter’s basic topology, this paper proposes a variable duty-cycle control strategy of primary side switches for backward step-up mode. Using variable duty-cycle control, the LC resonant tank can be charged, and then the backward step-up mode can be realized. Soft switching characteristics of some primary side switches and all secondary side switches are guaranteed. In this study, the working principle of an LLC resonant converter under bidirectional control strategy was analyzed, and the backward step-up control was analyzed in detail. The voltage gain and the boundary of continuous conduction mode (CCM) and discontinuous conduction mode (DCM) were derived. A synchronous rectification method related to the backward step-up control is proposed. The control strategy was verified by experiments.

Suggested Citation

  • Jingkai Niu & Xuezhi Wu & Yue Wang & Long Jing & Weige Zhang & Yibin Tong, 2022. "Backward Step-Up Control Strategy for Bidirectional LLC Resonant Converter," Energies, MDPI, vol. 15(12), pages 1-15, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4471-:d:842702
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/15/12/4471/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/15/12/4471/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Danish Khan & Pengfei Hu & Muhammad Waseem & Muhammad Yasir Ali Khan & Mustafa Tahir & Andres Annuk, 2022. "Practical Evaluation of Loss Reduction in Isolated Series Resonant Converter with Fixed Frequency Modulation," Energies, MDPI, vol. 15(16), pages 1-20, August.
    2. Ramy Kotb & Sajib Chakraborty & Dai-Duong Tran & Ekaterina Abramushkina & Mohamed El Baghdadi & Omar Hegazy, 2023. "Power Electronics Converters for Electric Vehicle Auxiliaries: State of the Art and Future Trends," Energies, MDPI, vol. 16(4), pages 1-42, February.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4471-:d:842702. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.