Frequency-Splitting Analysis of Four-Coil Resonant Wireless Power Transfer

被引：107

作者：

Zhang, Yiming ^{[1
]}

Zhao, Zhengming ^{[1
]}

Chen, Kainan ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Power Syst, Beijing 100084, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2014年 / 50卷 / 04期

关键词：

Four coils; frequency splitting; input impedance; magnetic resonance; source internal resistance; wireless power transfer (WPT); ENERGY-TRANSFER SYSTEMS; DESIGN; MODEL;

D O I：

10.1109/TIA.2013.2295007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Based on four-coil magnetically coupled resonant wireless power transfer, this paper demonstrates, explains, and analyzes the frequency-splitting phenomenon by using the circuit theory. First, the complete and simplified models are built to describe the whole system. The numerical formulas of the system efficiency both at and away from the resonant frequency are presented. Then the frequency-splitting phenomenon is displayed and further explained mathematically and physically. An important factor for frequency splitting is introduced. The boundary condition for frequency splitting and its splitting frequency points are deduced. The amplitude-frequency and phase-frequency characteristics of the input impedance are measured and described to verify the explanation. Three related factors are studied, and the sensitivity analysis is conducted. A solution is proposed that helps improve the efficiency when frequency splitting occurs. The theoretical calculations and experimental results provide a sound basis.

引用

页码：2436 / 2445

页数：10

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