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

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

Design and Control of Adjustable Turn-ratio LLC Converter for High-efficiency Operation of Wired/Wireless Integrated Charging System for Electric Vehicles

전기자동차용 유·무선 통합 충전 시스템의 고효율 동작을 위한 권선비 가변형 LLC 컨버터 설계 및 제어 방안

  • Jo, Hyeon-Woo (Dept. of Electrical & Computer Engineering, Sungkyunkwan University) ;
  • Sim, Dong-Hyeon (Dept. of Electrical & Computer Engineering, Sungkyunkwan University) ;
  • Lee, Ju-A (Dept. of Electrical & Computer Engineering, Sungkyunkwan University) ;
  • Son, Won-Jin (Dept. of Electrical & Computer Engineering, Sungkyunkwan University) ;
  • Lee, Byoung-Kuk (Dept. of Electrical Engineering, Sungkyunkwan University)
  • Received : 2021.10.11
  • Accepted : 2021.11.29
  • Published : 2022.06.20
Download PDF
⟨ Previous Next ⟩

Abstract

This paper proposes a method to adjust the turn ratio of a transformer for the high-efficiency operation of an LLC converter with a wide input range in a wired/wireless integrated charging system for electric vehicles. The characteristics of the inductive power transfer converter in the integrated charging system are analyzed to design the LLC converter, and the DC-link voltage range is derived. The aspect of voltage gain following each parameter of the LLC converter is analyzed, and the resonant network and transformer are designed. Based on the designed parameters, the feasibility of the design and control method is verified by implementing the operation of the LLC converter according to the DC-link and battery voltages.

Keywords

Acknowledgement

이 연구는 2020년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구임.('20011656') 이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임. (No. 2020R1A2C2003445)

References

  1. M. Chinthavali, O. Onar, S. Campbell, and L. M. Tolbert, "Isolated wired and wireless battery charger with integrated boost converter for PEV applications," in Proc., IEEE Energy Convers. Congr. Expo., pp. 607-614, Sep. 2015.
  2. D. Sim, J. Lee, W. Son, S. Ann, J. Byun, and B. K. Lee, "Design of DC-link voltage for high efficiency of wired/wireless integrated EV charger sharing DC-DC converter," in Proc., Power Electron., Conf., pp. 184-186, Aug. 2020.
  3. H. Chae, W. Kim, S. Yun, Y. Jeong, J. Lee, and H. T. Moon, "3.3 kW on board charger for electrc vehicle," in Proc. IEEE 8th Int. Conf. Power Electron. ECCE Asia, pp. 2717-2719, 2011.
  4. J. Luo, J. Wang, Z. Fang, J. Shao, and J. Li, "Optimal design of a high efficiency LLC resonant converter with a narrow frequency range for voltage regulation," Energies, Vol. 11, No. 1124, May 2018.
  5. S. Ann, W. Son, J. Lee, J. Byun, and B. K. Lee, "Design of a SiC-based LLC resonant converter for on-board chargers considering parasitic capacitance of planar transformer," in 23rd Int. Conf. Elect. Mach. Syst. ICEMS, pp. 316-319, 2020.
  6. D. Sim, M. Kwon, J. Lee, W. Son, S. Ann, and B. K. Lee, "Design method of LLC converter for wired/wireless integrated EV charger sharing DC-DC converter considering wide variation of coupling coefficient under coil misalignment," in Proc., Power Electron. Conf., pp. 40-42, Nov. 2020.
  7. B. Choi, W. Lee, and I. O. Lee, "A phase-shifted full-bridge converter with a new rectifier circuit for reducing circuiting current," Trans. Korean Inst. Power Electron., pp. 237-240, Jun. 2021.
  8. C. Lim, J. Han, M. Park, K. Kim, and G. W. Moon, "Phase-shifted full-bridge DC-DC converter with high efficiency and reduced output filter using center-tapped clamp circuit," in Proc. IEEE Appl. Power Electron. Conf. Expo., pp. 1710-1715, 2019.
  9. W. Chwei-Sen, O. H. Stielau, and G. A. Covic, "Design considerations for a contactless electric vehicle battery charger," IEEE Trans. Ind. Electron., Vol. 52, No. 5, pp. 1308-1314, Oct. 2005. https://doi.org/10.1109/TIE.2005.855672
  10. S. Ann, D. Joo, M. Kim, and B. K. Lee, "High efficiency operation of the IPT converter with full and half bridge control for electric vehicles," Trans. Korean Inst. Power Electron., pp. 423-430, Oct. 2017.
  11. J. Byun and B. K. Lee, "Zero-phase angle frequency tracking control of wireless power tranfer system or electric vehicles using characteristics of LCCL-S topology," Trans. Korean Inst. Power Electron., pp. 404-411, Oct. 2020.
  12. Infineon, "Resonant LLC converter: operation and design," Infineon Appl. Note 2012-09, Sep. 2012.
  13. K. Park, C. Kim, G. Moon, and M. J. Youn, "Voltage oscillation reduction technique for phase-shift full-bridge converter," Trans. Korean Inst. Power Electron., pp. 598-609, Dec. 2005.
  14. J. Jung, T. Na, J. Choi, and J. Kwon, "Transformer winding method to improve the current balance of output rectifiers in LLC resonant converters," in Proc., Power Electron. Conf., pp. 475-4779, Jun. 2008.
  15. J. Jung, "Bifilar winding of a center-tapped transformer including integrated resonant inductance for LLC resonant converters," IEEE Trans. Power Electron., Vol. 28, No. 2, pp. 615-620, Feb. 2013. https://doi.org/10.1109/TPEL.2012.2213097
  16. M. Li, Q. Chen, X. Ren, Y. Zhang, K. Jin, and B. Chen, "The integrated LLC resonant converter using center-tapped transformer for on-board EV charger," in IEEE Energy Convers. Congr. Expo. (ECCE), pp. 6293-6298, 2015.
  17. M. Kim, D. Woo, B. K. Lee, N. J .Kim, and J. S. Kim, "Loss analysis of power conversion equipment for efficiency improvement," Trans. Korean Inst. Power Electron., pp. 80-90, Feb. 2014.