[논문]전기자동차용 유·무선 통합 충전을 고려한 무선 충전 시스템의 두 가지 제어 방식에 따른 효율 비교·분석

허훈; 이주아; 심동현; 손원진; 이병국

doi:10.6113/tkpe.2022.27.3.228

전기자동차용 유·무선 통합 충전을 고려한 무선 충전 시스템의 두 가지 제어 방식에 따른 효율 비교·분석
Comparison of Efficiency According to the Two Control Method of the Wireless Charging System Considering Wired/Wireless Integrated Charging System for EV 원문보기

전력전자학회 논문지 = The Transactions of the Korean Institute of Power Electronics, v.27 no.3, 2022년, pp.228 - 236

허훈 (Dept. of Electrical and Computer Engineering, Sungkyunkwan University) , 이주아 (Dept. of Electrical and Computer Engineering, Sungkyunkwan University) , 심동현 (Dept. of Electrical and Computer Engineering, Sungkyunkwan University) , 손원진 (Dept. of Electrical and Computer Engineering, Sungkyunkwan University) , 이병국 (Dept. of Electrical and Computer Engineering, Sungkyunkwan University)

Abstract ▼ AI-Helper

The charging methods of electric vehicles are divided into wired charging and wireless charging. Restrictions on the use of charging infrastructure for wireless charging vehicles currently exist because most charging infrastructure uses the wired charging method. Thus, wired and wireless integrated charging system has been studied. In this system, a wireless charging system especially requires a control method for high-efficiency operation in consideration of a change in a coupling coefficient. Therefore, this paper introduces two control methods for the high-efficiency operation of wireless charging that can be applied to wired and wireless integrated charging systems. In addition, loss analysis is performed through PSIM simulation to select a more advantageous method for high-efficiency operation among the two control methods. To verify the simulation-based loss analysis result, the two control methods are applied to the actual wireless charging system, and the efficiency is compared through the experiments Based on the experimental results, a control method suitable for high-efficiency operation of the wireless charging method is selected.

주제어

표/그림 (24)

그림 Fig. 1. Circuit diagram of wired/wireless integrated charger system.
그림 Fig. 2. Circuit diagram of wireless charging system.
그림 Fig. 3. Switching operation according to the control method.
그림 Fig. 4. Design of CP-CP coil using JMAG simulation.
그림 Fig. 5. DC_link voltage according to coupling coefficient.
표 TABLE I JMAG SIMULATION CONDITIONS
표 TABLE II SPECIFICATIONS OF IPT/LLC CONVERTER
그림 Fig. 6. flow chart of LLC converter control.
그림 Fig. 7. Resonance curve of designed LLC converter.
그림 Fig. 8. Operating characteristics of the LLC converter control.
그림 Fig. 9. flow chart of IPT/LLC converter control.
그림 Fig. 10. Operating characteristics of the IPT/LLC converter control.
표 TABLE III DESIGN PARAMETERS OF IPT CONVERTER
표 TABLE IV DESIGN PARAMETERS OF LLC CONVERTER
그림 Fig. 11. CC-CP-CV battery charging profile.
그림 Fig. 12. Loss comparison according to control method under 7.2 [kW] output condition.
그림 Fig. 13. Efficiency comparison according to control method under 7.2 [kW] output condition.
표 TABLE V LOSS ANALYSIS CONDITIONS ACCORDING TO THE COUPLING COEFFICIENT
그림 Fig. 14. Loss comparison according to control method under 3.6 [kW] output condition.
그림 Fig. 15. Efficiency comparison according to control method under 3.6 [kW] output condition.
그림 Fig. 16. Wireless charging system test pad.
그림 Fig. 17. Efficiency analysis of wireless charging system through experiment under 3.6 [kW] output condition.
그림 Fig. 18. Experimental waveforms with maximum efficiency under k_mid condition.
그림 Fig. 19. Experimental waveforms with maximum efficiency under k_max condition.

참고문헌 (6)

M. Chinthavali, O. C. Onar, S. L. Campbell, and L. M. Tolbert, "Isolated wired and wireless battery charger with integrated boost converter for PEV applications," IEEE Energy Conversion Congress and Exposition, Oct. 2015.
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," Power Electron. Conf., pp. 184-186, Aug. 2020.
D. G. Woo, "Optimal design and control strategy of inductive power transfer charging system for electric vehicles," Ph.D. dissertation, Dept. Electron., Elect. & Comput. Eng., Sungkyunkwan Univ., Suwon, Korea, 2016.
S. J Ann, D. M Joo, M. K Kim, and B. K. Lee "High efficiency operation of the IPT converter with full and half bridge control for electric vehicles," The Transactions of Korean Institute of Power Electronics Vol. 22, No. 5, pp 423-430, Oct. 2017.
J. M. Burdio, L. A. Barragan, F. Monterde, D. Navarro, and J. Acero, "Asymmetrical voltage-cancellation control for full-bridge series resonant inverters," IEEE Trans. Power Electron., Vol. 19, No. 2, pp. 461-469, Mar. 2004.

상세보기
J. W. Seo, H. S. Lee, S. Ann, J. Byun, M. Kim, and B. K. Lee "Loss analysis of inductive power transfer converter with phase-shift control," in Proceedings of the Power Electronics Annual Autumn Conference, pp. 157-158, Nov. 2016.

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