A General Equivalent Model for Multi-Coil Wireless Power Transfer System Analysis and its Application on Compensation Network Design

Authors

  • Yanjie Guo 1 Key Laboratory of Power Electronics and Electric Drives, Institute of Electrical Engineering Chinese Academy of Sciences, No.6 Beiertiao, Zhongguancun, Beijing, 100190, China2 Collaborative Innovation Center for Electric Vehicles in Beijing, Beijing 100081, China
  • Lifang Wang 1 Key Laboratory of Power Electronics and Electric Drives, Institute of Electrical Engineering Chinese Academy of Sciences, No.6 Beiertiao, Zhongguancun, Beijing, 100190, China, 2 Collaborative Innovation Center for Electric Vehicles in Beijing, Beijing 100081, China
  • Chenglin Liao 1 Key Laboratory of Power Electronics and Electric Drives, Institute of Electrical Engineering Chinese Academy of Sciences, No.6 Beiertiao, Zhongguancun, Beijing, 100190, China, 2 Collaborative Innovation Center for Electric Vehicles in Beijing, Beijing 100081, China

Keywords:

Compensation network design, efficiency improvement, general equivalent model, Wireless power transfer

Abstract

This paper presents a novel general equivalent model of multi-coil coupled wireless power transfer (WPT) system and its application on compensation network design. The proposed equivalent model has the advantages of concise expressions, good accuracy, and fast calculation speed. Firstly, the general equivalent model is established to get the concise expressions of system efficiency and output power. Then, based on the proposed model, compensation network design method is discussed, considering several system performance indicators. Furthermore, the proposed model and method are verified by a developed WPT prototype. Meanwhile, the equivalent characteristics and the mutual-resistance effect are analyzed. Also, numerical simulations are conducted to study the magnetic flux distribution, the magnetic field exposure issue, and the current distribution in coil Litz wire. Finally, a varied capacitor compensation method is presented to improve system efficiency on the conditions of coil misalignments.

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References

X. Shi, C. Qi, M. Qu, et al., “Effects of coil locations on wireless power transfer via magnetic resonance coupling,” Appl. Comput. Electromagn. Soc. J., vol. 31, no. 3, pp. 270-278, Mar. 2016.

X. H. Jin, J. M. Caicedo, and M. Ali, “Near-field wireless power transfer to embedded smart sensor antennas in concrete,” Appl. Comput. Electromagn. Soc. J., vol. 30, no. 3, pp. 261-269, Mar. 2015.

A. Kurs, A. Karalis, R. Moffatt, et al., “Wireless power transfer via strongly coupled magnetic resonances,” Science, vol. 317, no. 83, pp. 83-86, July 2007.

Q. W. Zhu, L. F. Wang, and C. L. Liao, “Compensate capacitor optimization for kilowattlevel magnetically resonant wireless charging system,” IEEE Trans. Ind. Electron., vol. 61, no. 12, pp. 6758-6768, Dec. 2014.

K. Fotopoulou and B. W. Flynn, “Wireless power transfer in loosely coupled links: coil misalignment model,” IEEE Trans. Magn., vol. 47, no. 2, pp. 416-430, Feb. 2011.

J. H. Wang, S. L. Ho, W. N. Fu, et al., “Analytical design study of a novel Witricity charger with lateral and angular misalignments for efficient wireless energy transmission,” IEEE Trans. Magn., vol. 47, no. 10, pp. 2616-2619, Oct. 2011.

J. Yin, D. Y. Lin, C. K. Lee, et al., “A systematic approach for load monitoring and power control in wireless power transfer systems without any direct output measurement,” IEEE Trans. Power Electron., vol. 30, no. 3, pp. 1657-1667, Mar. 2015.

C. Zhang, W. X. Zhong, X. Liu, et al., “A fast method for generating time-varying magnetic field patterns of mid-range wireless power transfer systems,” IEEE Trans. Power Electron., vol. 30, no. 3, pp. 1513-1520, Mar. 2015.

S. J. Zhou and C. C. Mi, “Multi-paralleled LCC reactive power compensation networks and their tuning method for electric vehicle dynamic wireless charging,” IEEE Trans. Ind. Electron., vol. 63, no. 10, pp. 6546-6556, Oct. 2016.

J. Zhou, Y. Q. Gao, X. Y. Huang, et al., “Voltage transfer ratio analysis for multi-receiver resonant power transfer systems,” IET Power Electron., vol. 9, no. 15, pp. 2795-2802, Aug. 2016.

A. Junussov, M. Bagheri, and M. Lu, “Analysis of magnetically coupled resonator and four-coil wireless charging systems for EV,” in Proc. 2017 Int. Conf. Sustain. Energy Eng. and Appl., pp. 1-7, 2017.

A. K. RamRakhyani and G. Lazzi, “On the design of efficient multi-coil telemetry system for biomedical implants,” IEEE Trans. Biomed. Circuits Syst., vol. 7, no. 1, pp. 11-23, Feb. 2013.

T. P. Duong and J. W. Lee, “Experimental results of high-efficiency resonant coupling wireless power transfer using a variable coupling method,” IEEE Microw. Wireless Compon. Lett., vol. 21, no. 8, pp. 442-444, Aug. 2011.

J. W. Kim, D. H. Kim, and Y. J. Park, “Analysis of capacitive impedance matching networks for simultaneous wireless power transfer to multiple devices,” IEEE Trans. Ind. Electron., vol. 62, no. 5, pp. 2807-2813, May 2015.

S. Q. Li, W. H. Li, J. J. Deng, et al., “A doublesided LCC compensation network and its tuning method for wireless power transfer,” IEEE Trans. Veh. Technol., vol. 64, no. 6, pp. 2261-2273, June 2015.

M. F. Fu, H. Yin, X. N. Zhu, et al., “Analysis and tracking of optimal load in wireless power transfer systems,” IEEE Trans. Power Electron., vol. 30, no. 7, pp. 3952-3963, July 2015.

International Commission on Non-Ionizing Radiation Protection, “ICNIRP Statement - Guidelines for Limiting Exposure to Time-varying Electric and Magnetic Fields,” Health Phys., vol. 99, no. 6, pp. 818-836, Dec. 2010.

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Published

2021-07-25

How to Cite

[1]
Yanjie Guo, Lifang Wang, and Chenglin Liao, “A General Equivalent Model for Multi-Coil Wireless Power Transfer System Analysis and its Application on Compensation Network Design”, ACES Journal, vol. 33, no. 06, pp. 648–656, Jul. 2021.

Issue

2018: Vol 33 Iss 6

Section

Articles