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Journal Article Circuit Model Based Analysis of a Wireless Energy Transfer System Via Coupled Magnetic Resonances
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Authors
Sanghoon Cheon, Yong-Hae Kim, Seung-Youl Kang, Myung Lae Lee, Jong-Moo Lee, Taehyoung Zyung
Issue Date
2010-12
Citation
IEEE Transactions on Industrial Electronics, v.58, no.7, pp.2906-2914
ISSN
0278-0046
Publisher
IEEE
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1109/TIE.2010.2072893
Project Code
10ZE1100, A Creative Research on ETRI R&DB System and Seed Project for enhancing ETRI Capability, Hyun Tchang Hee
Abstract
A simple equivalent-circuit model is developed for a wireless energy-transfer system via coupled magnetic resonances, and a practical design method is also provided. Node equations for the resonance system are built with the method, expanding on the equations for a transformer, and the optimum distances of the coils in the system are derived analytically for optimum coupling coefficients for high transfer efficiency. In order to calculate the frequency characteristics for a lossy system, the equivalent model is established at an electric-design automation tool. The model parameters of the actual system are extracted, and the modeling results are compared with measurements. Through the developed model, it is seen that the system can transfer power over a midrange of a few meters and that impedance matching is important to achieve high efficiency. © 2006 IEEE.
KSP Keywords
Coupled magnetic resonances, Coupling Coefficient, Design method, Energy transfer system, Equivalent model, Frequency characteristics, Magnetic resonance(MR), Model parameter, Model-based analysis, Practical design, Transfer efficiency