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http://dx.doi.org/10.5370/KIEE.2013.62.6.762

Characteristics of Wireless Power Transmission applying the superconducting coil  

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.62, no.6, 2013 , pp. 762-766 More about this Journal
Abstract
Interest in Wireless Power Transmission (WPT) technology has been increasing worldwide recently. This trend is proved by commercialized products such as electric toothbrush, wireless razor, and wireless charger for mobile phone battery. Studies for enhancing the applicability of the technology have been continuously conducted. Currently the WPT technology is based on the technologies using microwave, inductively coupling, and magnetic resonance. In the meantime, development of the microwave-based WPT faces difficulty due to health hazards involved in the technology, and application of the WPT technology using inductively coupling is restricted by area due to the problem of transmission length. In comparison, the WPT technology using magnetic resonance draws attention in terms of efficiency and transmission length. In this study, the sending coil based on the WPT technology using magnetic resonance system was replaced with an HTS coil to enhance transmission efficiency. Since the HTS coil has a zero resistance, power transmission loss can be minimized. At the same time, size of the current density could be increased to 100 times or more than typical coils. In addition, through impedance matching of LC device, maximal resonance properties were induced and consequently, frequency selection quality characteristics or Q was enhanced. As a result, the WPT type using the HTS coil showed a longer transmission length and better transmission efficiency compared with the WPT type using typical coils.
Keywords
WPT; HTS coil; Resonance; Transmission efficiency; Q-factor;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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