Electronic Science and Technology ›› 2022, Vol. 35 ›› Issue (6): 48-53.doi: 10.16180/j.cnki.issn1007-7820.2022.06.008

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Frequency Splitting Characteristics Analysis of Electrical-Field Coupled Wireless Power Transfer

YANG Rui1,SUN Yanzhou1,YU Jianghua2,ZHANG Mengfei1,WEI Yanfang1   

  1. 1. School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China
    2. Wuhu County Power Supply Company,State Grid Anhui Electric Power Co., Ltd, Wuhu 241000,China
  • Received:2021-01-20 Online:2022-06-15 Published:2022-06-20
  • Supported by:
    National Natural Science Foundation of China(61703144)


In order to solve the problems of frequency splitting and low efficiency in wireless power transfer system, the electrical-field coupled wireless power transfer system with double-side LCLC compensation topology is taken as the research object in this study. The effect laws of variable parameters on the system output are analyzed by system modeling. The relationship between system efficiency and the important parameters is derived using the circuit theory, and the system efficiency is analyzed in detail using MATLAB simulation software. The correctness of simulation results are verified by experiments. The results show that adjusting the capacitance value of the coupling mechanism below the frequency division point can avoid frequency splitting in the system, while fixing the relative position of the coupling plates can improve the system efficiency by increasing the frequency of the system to the critical point of efficiency, and the best efficiency of the system can reach 89.4%.

Key words: electric-field coupling, wireless power transfer, symmetrical compensation, constant current characteristic, coupling mechanism, parameter change, frequency splitting, transmission efficiency

CLC Number: 

  • TN801