电场耦合式无线电能传输频率分裂特性分析

doi:10.16180/j.cnki.issn1007-7820.2022.06.008

Abstract

Abstract:

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

YANG Rui,SUN Yanzhou,YU Jianghua,ZHANG Mengfei,WEI Yanfang. Frequency Splitting Characteristics Analysis of Electrical-Field Coupled Wireless Power Transfer[J].Electronic Science and Technology, 2022, 35(6): 48-53.

Figures/Tables 9

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参数	数值
V₁(V₂)	55 V
L_f₁(L_f₂)	15 198 nH
C_f₁(C_f₂)	0.91 nF
C₁(C₂)	500 pF
L₁(L₂)	388.14 nH
C_s₁(C_s₂)	200 pF
f_N	13.56 MHz

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

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