Experimental results of high-efficiency resonant coupling wireless power transfer using a variable coupling method

Thuc Phi Duong; Jong Wook Lee

doi:10.1109/LMWC.2011.2160163

Experimental results of high-efficiency resonant coupling wireless power transfer using a variable coupling method

Thuc Phi Duong, Jong Wook Lee

Research output: Contribution to journal › Article › peer-review

220 Citations (Scopus)

Abstract

We experimentally demonstrate that the efficiency of wireless power transfer utilizing resonant coupling is improved by applying the matching condition. The matching condition is extracted from an equivalent circuit model of a magnetically coupled wireless power transfer system. This condition is achieved by varying the coupling factor between the source (load) and the internal resonator. Applying this technique results in efficiency improvements of 46.2% and 29.3% at distances of 60 cm and 1 m, respectively. The maximum efficiency is 92.5% at 15 cm. A circuit model based on the extracted parameters of the resonators produces results similar to the experimental data.

Original language	English
Article number	5940188
Pages (from-to)	442-444
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	21
Issue number	8
DOIs	https://doi.org/10.1109/LMWC.2011.2160163
Publication status	Published - Aug 2011

Bibliographical note

Funding Information:
Manuscript received March 01, 2011; revised May 13, 2011; accepted June 06, 2011. Date of publication July 01, 2011; date of current version August 10, 2011. This work was supported by the Mid-Career Researcher Program through the National Research Foundation of Korea (NRF), grant funded by the Korean government (MEST, 2009-0078157).

Keywords

Coupling coefficient
efficiency
magnetic resonance
wireless power transfer

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10.1109/LMWC.2011.2160163

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abstract = "We experimentally demonstrate that the efficiency of wireless power transfer utilizing resonant coupling is improved by applying the matching condition. The matching condition is extracted from an equivalent circuit model of a magnetically coupled wireless power transfer system. This condition is achieved by varying the coupling factor between the source (load) and the internal resonator. Applying this technique results in efficiency improvements of 46.2% and 29.3% at distances of 60 cm and 1 m, respectively. The maximum efficiency is 92.5% at 15 cm. A circuit model based on the extracted parameters of the resonators produces results similar to the experimental data.",

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AB - We experimentally demonstrate that the efficiency of wireless power transfer utilizing resonant coupling is improved by applying the matching condition. The matching condition is extracted from an equivalent circuit model of a magnetically coupled wireless power transfer system. This condition is achieved by varying the coupling factor between the source (load) and the internal resonator. Applying this technique results in efficiency improvements of 46.2% and 29.3% at distances of 60 cm and 1 m, respectively. The maximum efficiency is 92.5% at 15 cm. A circuit model based on the extracted parameters of the resonators produces results similar to the experimental data.

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Experimental results of high-efficiency resonant coupling wireless power transfer using a variable coupling method

Abstract

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Keywords

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