DOI QR코드

DOI QR Code

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

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)

References

  1. B. Zhao, Q. Song, W. Liu, and Y. Sun, "Overview of dual-active-bridge isolated bidirectional DC-DC converter for high-frequency-link power-conversion system," IEEE Transactions on Power Electronics, Vol. 29, No. 8, pp. 4091-4106, Aug. 2014. https://doi.org/10.1109/TPEL.2013.2289913
  2. F. Krismer, J. Biela, and J. W. Kolar, "Acomparative evaluation of isolated bi-directional DC/DC converters with wide input and output voltage range," IEEE 2005 Industry Applications Conference, Oct. 2005.
  3. H. J. Choi, W. B. Lee, and J. H. Jung, "Practical design methodology of dual active bridge converter as isolated bi-directional DC-DC converter for solid state transformer," The Transactions of the Korean Institute of Power Electronics, Vol. 22, No. 2, pp. 102-108, Apr. 2017. https://doi.org/10.6113/TKPE.2017.22.2.102
  4. W. Chen, P. Rong, and Z. Lu, "Snubberless bidirectional DC-DC converter with new CLLC resonant tank featuring minimized switching loss," IEEE Transactions on Power Electronics, Vol. 57, No. 9, pp. 3075-3086, Sep. 2010.
  5. J. Shao, B. Agrawal, and F. Wei, "SiC MOSFET based high-efficiency bi-directional on-board charger for EVs," in IEEE APEC 2019 Industry Presentation, Mar. 2019.
  6. B. Li, Q. Li, F. C. Lee, Z. Liu, and Y. Yang, "A high-efficiency high-density wide-bandgap device-based bidirectional on-board charger," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 6, No. 3, pp. 1627-1636, Sep. 2018. https://doi.org/10.1109/jestpe.2018.2845846
  7. E. S. Kim and J. S. Oh, "High-efficiency bidirectional LLC resonant converter with primary auxiliary windings, energies 2019," Vol. 12, Vol. 24, Dec. 2019.
  8. E. S. Kim, J. S. Oh, M. J. Kim, J. H. Lee, J. W. Woo, and Y. S. Jeon, "Enhancing efficiency in bidirectional resonant DC-DC converter," 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Mar. 2020.
  9. J. S Oh, J. H Lee, K. J Yoo, K. H Han, and E. S Kim, "Bidirectional LLC resonant converter using auxiliary windings," in Proceedings of KIPE Autumn Conference, pp. 22-24, Nov. 2019.
  10. T. Mishima, H. Mizutani, and M. Nakaoka, "A sensitivity-improved PFM LLC resonant full-bridge DC-DC converter with LC antiresonant circuitry," IEEE Transactions on Power Electronics, Vol. 32, No. 1, pp. 310-324, Jan. 2017. https://doi.org/10.1109/TPEL.2016.2524640