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J Electromagn Eng Sci > Volume 17(2); 2017 > Article
Journal of Electromagnetic Engineering and Science 2017;17(2):76-85.
DOI: https://doi.org/10.5515/JKIEES.2017.17.2.76   
Magnetic Resonant Wireless Power Transfer with Rearranged Configurations
Seok Hyon Kang, Chang Won Jung
Graduate School of Nano IT Design Fusion, Seoul National University of Science and Technology
Correspondence:  Chang Won Jung,Email: changwoj@seoultech.ac.kr
Abstract
We investigate the indirect-fed magnetic resonant wireless power transfer (MR-WPT) system for wireless charging for mobile devices by rearranging the loops and coils. Conventional MR-WPT is difficult to apply to consumer electronic products because of the arrangement of the resonators. In addition, there are restrictions for charging using a wireless technology, which depend on the circumstances of the usage scenarios. For practical applications, we analyzed the transfer efficiency of the MR-WPT system with various combinations and positions of resonators. Three rearranged configurations (Out-Out, Out-In, In-In) have been considered and experimentally investigated using hollow pipe loops and wire copper coils. There were four types of loops and two types of coils; each one had a different diameter and thickness. The results of the measurements show that the trends of the transfer efficiencies for the three configurations were similar. A transfer efficiency of 82.5% was achieved at a 35-cm distance between the 60-cm diameter transmitter (Tx) and receiver (Rx) coils.
Key words: Indirect-Fed, Magnetic Resonant, Resonator, Wireless Power Transfer

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