Time-Domain Analysis of Wireless Power Transfer System Behavior Based on Coupled-Mode Theory

被引：3

作者：

Shim, Hyunjin ^{[1
]}

Nam, Sangwook ^{[1
]}

Lee, Bomson ^{[2
]}

机构：

[1] Seoul Natl Univ, Inst New Media & Commun, Sch Elect Engn & Comp Sci, Seoul, South Korea

[2] Kyung Hee Univ, Sch Elect & Informat, Dept Elect & Radio Engn, Yongin, South Korea

来源：

JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE | 2016年 / 16卷 / 04期

关键词：

Coupling Coefficient; Coupled-Mode Theory (CMT); Power Transfer Efficiency (PTE); Quality Factor (Q); Transient Circuit Theory; Wireless Power Transmission (WPT);

D O I：

10.5515/JKIEES.2016.16.4.219

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：

In this paper, coupled-mode theory (CMT) is used to obtain a transient solution analytically for a wireless power transfer system (WPTS) when unit energy is applied to one of two resonators. The solutions are compared with those obtained using equivalent circuit-based analysis. The time-domain CMT is accurate only when resonant coils are weakly coupled and have large quality factors, and the reason for this inaccuracy is outlined. Even though the time-domain CMT solution does not describe the WPTS behavior precisely, it is accurate enough to allow for an understanding of the mechanism of energy exchange between two resonators qualitatively. Based on the time-domain CMT solution, the critical coupling coefficient is derived and a criterion is suggested for distinguishing inductive coupling and magnetic resonance coupling of the WPTS.

引用

页码：219 / 224

页数：6

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