A Resonant Coupling Power Transfer System Using Two Driving Coils

Changping Li, Bo Wang, Ruining Huang and Ying Yi
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Changping Li: College of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Bo Wang: Division of Information and Computing Technology, College of Science and Engineering, Hamad Bin Khalifa University, Education City 34110, Qatar
Ruining Huang: School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
Ying Yi: Division of Information and Computing Technology, College of Science and Engineering, Hamad Bin Khalifa University, Education City 34110, Qatar

Energies, 2019, vol. 12, issue 15, 1-11

Abstract: This paper presents a resonance-based wireless power transfer (R-WPT) system using two multi-layer multi-turn inductor coils on the transmission side and a third coil on the receiver side. We theoretically characterized and optimized the system in terms of quality factor ( Q factor) of the coils and power transfer efficiency (PTE). In our R-WPT prototype, the alternating currents (AC) were simultaneously applied to two transmitter coils, which, in turn, transferred power wirelessly to the secondary coil with a 3-mm radius on the receiving end. Owing to the optimization of the inductive coils, all of the coils achieved the highest Q -factor and PTE at the resonance frequency of 2.9 MHz, and the transfer distance could be extended up to 30 mm. The results show that the PTE was greater than 74% at a separation distance of 5 mm and about 38.7% at 20 mm. This is distinctly higher than that of its 2 and 3-coil counterparts using only one driving coil.

Keywords: resonance-based wireless power transfer (R-WPT); resonance frequency; power transfer efficiency (PTE); 3-coil system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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