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http://dx.doi.org/10.5515/KJKIEES.2017.28.1.76

Reduction of Leakage Magnetic Fields in Low Frequency WPT System Using Soft Magnetic Materials  

Lee, In-Gon (Department of Information & Communication Engineering, Kongju National University)
Kim, Nam (Department of Information & Communication Engineering, Chungbook National University)
Cho, In-Kui (Radio Technology Research Department, ETRI)
Hong, Ic-Pyo (Department of Information & Communication Engineering, Kongju National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.1, 2017 , pp. 76-79 More about this Journal
Abstract
This paper presents the electromagnetic shielding structure for low frequency wireless power transfer system with magnetic induction method using soft magnetic materials. Soft magnetic materials have advantages such as high permeability and low magnetic loss, but have undesirable effect of power loss by eddy current. To overcome this, we proposed the patterned soft magnetic material to suppress the eddy current path. For validity of this paper, we simulated the coil transfer efficiency and the radiated electromagnetic field, and fabricated the proposed structure using 79-permalloy. The measured results shows good agreements with the simulated results and reduction of the radiated electromagnetic field compared to commercial ferrite plate.
Keywords
Wireless Power Transfer; Magnetic Induction; Soft Magnetic Material; Eddy Current;
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