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http://dx.doi.org/10.5515/KJKIEES.2010.21.6.564

Study on Arrangement of Self-Resonant Coils in Wireless Power Transfer System Based on Magnetic Resonance  

Kim, Jin-Wook (Power Electrical Equipment Information and Comm., UST)
Ji, Hyeon-Ho (Electronic and Information System Eng., Hanyang University)
Choi, Yeon-Gyu (Comm. and Electronic Eng., Hanyang University)
Yun, Young-Hyun (Comm. and Electronic Eng., Hanyang University)
Kim, Kwan-Ho (KERI)
Park, Young-Jin (Power Electrical Equipment Information and Comm., UST)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.21, no.6, 2010 , pp. 564-572 More about this Journal
Abstract
In this paper, characteristics on arrangement of coils in the wireless power transfer system based on magnetic resonance is presented. A helical structure is used for a self-resonant coil. To design a proper self-resonant helical coil, its inductance and capacitance are obtained. Using the finite element method, the self-resonant coil designed is simulated and characteristics of wireless power transfer with various arrangement between Tx and Rx resonant coils is analyzed. For verification, a prototype of a wireless power transfer system based on magnetic resonance is fabricated and efficiency of different arrangement such as both vertical and parallel arrangements is measured. From the measurement, transmission efficiency of 50 % for parallel arrangement is obtained within twice the diameter of the coil while for the vertical arrangement it is measured within one and a half diameter of the coil. Maximum efficiency of 84.25 % is observed at the distance 40 cm from the resonant coil in the case of parallel arrangement.
Keywords
Magnetic Resonance; Wireless Power Transmission(WPT); Helical Coil;
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