Circuit Modeling of a Wireless Power Transfer System Containing Ferrite Shields Using an Extended Impedance Expansion Method

被引：6

作者：

Haga, Nozomi ^{[1
]}

Chakarothai, Jerdvisanop ^{[2
]}

Konno, Keisuke ^{[3
]}

机构：

[1] Gunma Univ, Grad Sch Sci & Technol, Kiryu, Gumma 3768515, Japan

[2] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan

[3] Tohoku Univ, Grad Sch Engn, Dept Commun Engn, Sendai, Miyagi 9808579, Japan

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2022年 / 70卷 / 05期

基金：

日本学术振兴会;

关键词：

Integrated circuit modeling; Impedance; Ferrites; Method of moments; Scattering; Mathematical models; Coils; Dielectric materials; equivalent circuits; ferrites; magnetic materials; method of moments (MoM); wireless power transmission; ELECTROMAGNETIC SCATTERING;

D O I：

10.1109/TMTT.2022.3149830

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The impedance expansion method (IEM) is a circuit modeling technique based on the method of moments (MoM). This study extended the conventional IEM to be applied to wireless power transfer (WPT) systems containing dielectric/magnetic (DM) bodies such as ferrites. The advantages of the extended IEM are that it can consider arbitrarily shaped DM bodies, self-resonant coils, and radiation loss, and that the equivalent electromagnetic currents on DM bodies are not treated as unknowns in the resulting circuit model. Numerical experiments revealed that the extended IEM is applicable up to the frequency at which the dimensions of the DM bodies are approximately 0.3 times the wavelength of electromagnetic waves inside the medium. An equivalent circuit model of a WPT system containing ferrite shields was obtained using the extended IEM and validated using the full-wave MoM and the finite-difference time-domain (FDTD) method.

引用

页码：2872 / 2881

页数：10

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