Study on Frequency Splitting in Wireless Power Transfer System

doi:10.16628/j.cnki.2095-8188.2023.02.010

Abstract

Abstract:

Aiming at the output power decreases of the magnetically-coupled wireless power transfer (WPT) system at the natural frequency in the over-coupled state,combining with the mutual inductance coupling theory and introducing the detuning factor and coupling factor,the theoretical analysis of the simplified WPT system is carried out.It is concluded that the reason for the reduction of the output power of the system is the impedance mismatch.The LCC compensation circuit based on symmetrical T-type compensation circuit is used for impedance matching to improve the output power.Finally,the effectiveness of the compensation circuit is verified by simulation experiments,which provides an effective reference for solving the frequency splitting problem.

Key words: wireless power transfer(WPT), frequency splitting, impedance matching, maximum power transfer, coupled magnetic resonances

CLC Number:

TM724

LI Jinyang, WANG Yingjie, FENG Jianhui, CUI Chengcheng. Study on Frequency Splitting in Wireless Power Transfer System[J]. LOW VOLTAGE APPARATUS, 2023, 0(2): 53-57.

Figures/Tables 12

References 16

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参数	数值
参数	发射线圈	接收线圈
电感L/ uH	15.20	15.20
电容C/ pF	41.50	41.50
电阻R/Ω	0.08	0.08