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A Resonant Reactive Shielding for Planar Wireless Power Transfer System in Smartphone Application
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- Authors
- Jaehyoung Park, Dongwook Kim, Karam Hwang, Hyun Ho Park, Sang Il Kwak, Jong Hwa Kwon, Seungyoung Ahn
- Issue Date
- 2017-04
- Citation
- IEEE Transactions on Electromagnetic Compatibility, v.59, no.2, pp.685-703
- ISSN
- 0018-9375
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- Demand and interest in wireless power transfer (WPT) have been rapidly increasing lately. However, WPT systems have problems with electromagnetic field (EMF) leakage, which has stimulated interest in methods to suppress EMF leakage levels. In this paper, we propose a compact resonant reactive shielding coil topology for reducing EMF in a near-field WPT mobile device application. The proposed shielding coil employs a closed loop and matching capacitors, and is demonstrated to dramatically reduce the leakage magnetic field from a WPT system. For validation, the proposed shielding was implemented with other shielding topologies and the EMFs were measured and compared. The analytical, simulation, and measurement results were all strongly correlated.
- KSP Keywords
- Closed-loop, Electromagnetic Field, Magnetic field(MF), Mobile device application, Smartphone Application, Strongly correlated, WPT System, Wireless Power Transfer Systems(WPTS's), leakage magnetic field, measurement results, near-field