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- Title
Time-Domain Analysis of Wireless Power Transfer System Behavior Based on Coupled-Mode Theory.
- Authors
Hyunjin Shim; Sangwook Nam; Bomson Lee
- Abstract
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 timedomain CMT solution, the critical coupling coefficient is derived and a criterion is suggested for distinguishing inductive coupling and magnetic resonance coupling of the WPTS.
- Subjects
WIRELESS power transmission; COUPLED mode theory (Wave-motion); TIME-domain analysis; QUALITY factor; MAGNETIC resonance; MAGNETIC coupling
- Publication
Journal of Electromagnetic Engineering & Science, 2016, Vol 16, Issue 4, p219
- ISSN
2671-7255
- Publication type
Article
- DOI
10.5515/JKIEES.2016.16.4.219