Analysis and Experiment on Misalignment of Electrical-field Coupled Wireless Power Transfer

doi:10.11985/2022.02.028

Abstract

Abstract:

For the situation of asymmetric horizontal offset between the capacitor plate positions during charging of the wireless power transmission system, the different degrees of influence on the transmission power and efficiency under the occurrence of horizontal offset are analyzed. The electric field coupling transmission system with two-side LCLC compensation topology is taken as the research object. The transmission power model of the wireless power transmission and efficiency system and the offset model under different offset distances are established. The system transmission power and efficiency are analyzed by theoretical simulation using Matlab. The results show that when the moving side of the plate is misaligned, the transmitted power P decreases nonlinearly and the system efficiency has high robustness at this time. When the bypass capacitance is selected to be less than the design value, the transmission power and efficiency degradation caused by the pole plate offset can be reduced to achieve the desired transmission effect. Finally, the theoretical analysis is verified by experiment.

Key words: Electric-field coupling, wireless power transfer, misalignment analysis, capacitor plates offset

CLC Number:

TM724

ZHANG Mengfei, SUN Yanzhou, YANG Rui, YU Jianghua, YANG Ming. Analysis and Experiment on Misalignment of Electrical-field Coupled Wireless Power Transfer[J]. Journal of Electrical Engineering, 2022, 17(2): 243-250.

Figures/Tables 12

References 18

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参数	数值
V₁(V₂)/V	55
L_f₁(L_f₂)/nH	151.98
C_f₁(C_f₂)/nF	0.91
C₁(C₂)/pF	500
L₁(L₂)/nH	388.14
C_S₁(C_S₂)/pF	200
f_N/MHz	13.56