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http://dx.doi.org/10.5762/KAIS.2020.21.9.9

Three-Dimensional Magnetic Resonant Coil System with Double Transmitter Coil for Enhancement of Wireless Charging Efficiency and Charging Flexibility  

Gwon, Gi-Jong (Department of Mechanical and Control Engineering, Handong Global University)
Kwon, Youngsung (Department of Mechanical and Control Engineering, Handong Global University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.9, 2020 , pp. 9-16 More about this Journal
Abstract
Wireless charging has been considered an essential part of recent mobile devices. Moreover, various wireless charging systems have emerged through many studies. Among the systems, in the 2D flat coil system, the transmitter coil and receiver coil are arranged horizontally as close as possible to improve the charging efficiency. Nowadays, the 3D coil system has been proposed by adding some slope to flat 2D coils to reduce the volume. On the other hand, the 3D coil system has a lower charging efficiency than the 2D system that decreases rapidly with increasing distance. This paper proposes a new system that improves the low efficiency and charging freedom, which are the drawbacks of the existing 3D systems. The proposed system was designed in three-dimensions, and another transmitter coil was added to the transmitter coil to improve the transmission efficiency and flexibility. The measurement showed that the charging efficiency of the proposed system was 40.10% when the distance between coils was 8 mm, which is 20.5 % improvement over the existing one. The proposed method can be applied when new wireless charging systems are designed and improve charging efficiency can be improved.
Keywords
Wireless Charging System; Wireless Power Transfer; Magnetic Resonant Coil System; Charging Efficiency; Charging Flexibility; Three-Dimension Coil;
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Times Cited By KSCI : 2  (Citation Analysis)
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