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Journal Article
Circuit Model Based Analysis of a Wireless Energy Transfer System Via Coupled Magnetic Resonances
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- 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
- 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