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An Improved Wireless Power Charging System Capable of Stable Soft-Switching Operation Even in Wide Air Gaps

넓은 공극 범위에서도 안정된 소프트 스위칭 동작 가능한 개선된 무선 전력 충전 시스템

  • Woo, Jeong-Won (Dept. of Electrical & Electronics Engineering, Jeonju University) ;
  • Moon, Yu-Jin (Dept. of Electrical & Electronics Engineering, Jeonju University) ;
  • Kim, Eun-Soo (Dept. of Electrical & Electronics Engineering, Jeonju University)
  • Received : 2021.10.07
  • Accepted : 2022.01.04
  • Published : 2022.06.20

Abstract

In this paper, a single-stage alternating current (AC)-DC converter is proposed for the automated-guided vehicle wireless charging system. The proposed converter is capable of soft-switching under all input voltage (VAC: 220 Vrms ± 10%), load conditions (0-1 kW), and air gap changes (40-60 mm) by phase control at a fixed switching frequency. In addition, controlling a wide output voltage (Vo: 39~54 VDC) is possible by varying the link voltage and improving the input power factor and the total harmonic distortion factor. Experimental results were verified by making a prototype of a 1-kW wireless power charging system that operates with robustness to changes in air gaps.

Keywords

Acknowledgement

이 논문은 2021년 과학기술정보통신부의 재원으로 한국연구재단의 지원을 받아 수행된 연구임. (AGV 무선 전력 전송 충전 시스템 상용화 기반 기술 개발)

References

  1. M. P. Kazmierkowski and A. J. Moradewicz, "Unplugged but connected: review of contactless energy transfer systems," IEEE Industrial Electronics Magazine, Vol. 6, No. 4, pp. 47-55, Dec. 2012. https://doi.org/10.1109/MIE.2012.2220869
  2. A. Zaheer, G. A. Covic, and D. Kacprzak, "A bipolar pad in a 10-kHz 300-W distributed IPT system for AGV applications," IEEE Trans. Ind. Electron., Vol. 61, No. 7, pp. 3288-3301, Jul. 2014. https://doi.org/10.1109/TIE.2013.2281167
  3. H. Tokunaga, H. Tanabe, A. Imakiire, M. Kozako, and M. Hikita, "Experimental verification of operation and method of decision of maximum DC link voltage in wireless power transfer system," in 2016 IEEE Region 10 Conference (TENCON), pp. 797-800, 2016.
  4. F. Xu, S. Wong, and C. Tse, "Overall loss compensation and optimization control in single-stage inductive power transfer converter delivering constant power," IEEE Transactions on Power Electronics, Vol. 37, No. 1, pp. 1146-1158, Jan. 2022. https://doi.org/10.1109/TPEL.2021.3098914
  5. N. S. Gonzalez-Santini, H. Zeng, Y. Yu, and F. Z. Peng, "Z-source resonant converter with power factor correction for wireless power transfer applications," IEEE Transactions on Power Electronics, Vol. 31, No. 11, pp. 7691-7700, Nov. 2016. https://doi.org/10.1109/TPEL.2016.2560174
  6. J. Liu, K. W. Chan, and C. Y. Chung "Single-stage wireless-power-transfer resonant converter with boost bridgeless power-factor-correction rectifier," IEEE Transactions on Industrial Electronics, Vol. 65, No. 3, pp. 2145-2155, Mar. 2018. https://doi.org/10.1109/tie.2017.2745471
  7. J. Liu, W. Xu, K. W. Chan, M. Liu, X. Zhang, and N. H. L. Chan, "A three-phase single-stage AC-DC wireless-power-transfer converter with power factor correction and bus voltage control," IEEE Transactions on Power Electronics, Vol. 8, No. 2, pp. 1782-1800, Jun. 2020.
  8. M. J. Kim, J. W. Woo, and E. S. Kim, "Single stage AC-DC converter for wireless power transfer operating within wide voltage control range," Journal of Power Electronics, Vol. 21, pp. 768-781, Mar. 2021. https://doi.org/10.1007/s43236-021-00227-7
  9. J. W. Woo, K. C. Jang, E. S. Kim, "Single-stage AC/DC converter for wireless power transfer operating with robustness in wide air gaps," The Transactions of the Korean Institute of Power Electronics, Vol. 26, No. 2, pp. 141-149, Apr. 2021. https://doi.org/10.6113/TKPE.2021.26.2.141