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Home > Issues > RetrieveStudy on Load Impedance Matching Characteristics of Magnetic Coupled Resonant Wireless Power Transfer System
Journal of Magnetics, Volume 22, Number 3, 30 Sep 2017, Pages 497-502
Lijiao Gong (College of Mechanical and Electrical Engineering, Shihezi University), Xinheng Li (College of Mechanical and Electrical Engineering, Shihezi University), Xuewei Chao (College of Mechanical and Electrical Engineering, Shihezi University), Yang Li * 
(College of Mechanical and Electrical Engineering, Shihezi University), Hui Li (College of Mechanical and Electrical Engineering, Shihezi University), Hongwei Li (College of Mechanical and Electrical Engineering, Shihezi University)
(College of Mechanical and Electrical Engineering, Shihezi University), Hui Li (College of Mechanical and Electrical Engineering, Shihezi University), Hongwei Li (College of Mechanical and Electrical Engineering, Shihezi University)
Abstract
The impedance matching problem of magnetic coupled resonant wireless power transfer system based on planar spiral coils is studied in this paper. Taken the coupling factors into account, the relationships between
impedance matching, resonant frequency and transfer distance are analyzed. Supported by the simulation analyses and experimental evidences, it is indicated that the optimum matching resistances for transfer power
and transfer efficiency are different. In details, the optimal matching resistance for output power decreases with the transfer distance, while that for the transfer efficiency does not vary with transfer distance. Thus, this
research provides a valuable reference for the further research on adaptive impedance matching of magnetic coupled resonant wireless power transfer system.
impedance matching, resonant frequency and transfer distance are analyzed. Supported by the simulation analyses and experimental evidences, it is indicated that the optimum matching resistances for transfer power
and transfer efficiency are different. In details, the optimal matching resistance for output power decreases with the transfer distance, while that for the transfer efficiency does not vary with transfer distance. Thus, this
research provides a valuable reference for the further research on adaptive impedance matching of magnetic coupled resonant wireless power transfer system.
Keywords: wireless power transfer; planar spiral coil; impedance matching
DOI: https://doi.org/10.4283/JMAG.2017.22.3.497
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