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http://dx.doi.org/10.5370/KIEE.2018.67.6.804

Characteristics of Variable Wireless Charging System Applying Superconducting Coils  

Jeong, In-Sung (Dept. of Electrical Engineering, Chosun University)
Choi, Hyo-Sang (Dept. of Electrical Engineering, Chosun University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.67, no.6, 2018 , pp. 804-808 More about this Journal
Abstract
Interest in wireless power transfer (WPT) has been growing recently due to the rapid increase in the use of electronic devices. Wireless charging systems are currently being applied to mobile phones and many studies are being conducted to apply wireless charging systems to various devices. The current wireless charging systems are capable of 1:1 charging. For wireless charging, when the devices with the same resonance frequency are present in the vicinity, the charging efficiency may be significantly lowered due to frequency interference or the wireless charging systems may stop operating. In this paper, variable capacitors were applied to a superconducting WPT system to solve the frequency interference among multiple devices with the same frequency. When a wireless charging system was performing 1:1 operation, the frequency of the other devices was varied using variable capacitors. As a result, it was confirmed that the highly efficient WPT is possible without frequency interference even when multiple receivers are present.
Keywords
Wireless Power Transfer (WPT); Superconducting coil; Resonance frequency; Selectivity of frequency;
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