Effects of Coil Locations on Wireless Power Transfer via Magnetic Resonance Coupling

Authors

  • Xinzhi Shi School of Electronics and Information Wuhan University, Wuhan 430072, China
  • Chang Qi School of Electronics and Information Wuhan University, Wuhan 430072, China
  • Meiling Qu School of Electronics and Information Wuhan University, Wuhan 430072, China
  • Shuangli Ye School of Electronics and Information Wuhan University, Wuhan 430072, China
  • Gaofeng Wang School of Electronics and Information Wuhan University, Wuhan 430072, China , Microelectronics CAD Center, School of Electronics and Information Hangzhou Dianzi University, Hangzhou 310018, China

Keywords:

Magnetic resonance coupling, power transfer distance, wireless power transfer

Abstract

The coil locations have strong impacts on efficiency, resonant frequency and bandwidth in the wireless power transfer (WPT) system with four coil resonators, which is a popular configuration for midrange WPT via magnetic resonance coupling. Herein, effects of coil location parameters, such as the distances between neighboring coils, are investigated by virtue of full-wave electromagnetic solution and validated by measurements. Three operational regions can be defined in terms of the distances between neighboring coils: over coupling, strong coupling and under coupling. It is shown that the distance between the receiving coil and the load coil has significant impact on the power transfer efficiency whereas the distance between the driving coil and the transmitting coil may merely affect the bandwidth and the resonant frequency in the strong coupling regime. In addition, the distance between the transmitting coil and the receiving coil can have strong impact on both the bandwidth and the resonant frequency. Design guidelines for optimal coil locations, by which the highest transfer efficiency or the longest transfer distance can be achieved, are also discussed.

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Published

2021-08-18

How to Cite

[1]
X. . Shi, C. . Qi, M. . Qu, S. . Ye, and G. . Wang, “Effects of Coil Locations on Wireless Power Transfer via Magnetic Resonance Coupling”, ACES Journal, vol. 31, no. 03, pp. 270–278, Aug. 2021.

Issue

2016: Vol 31 Iss 3

Section

General Submission