An adaptive technique to improve wireless power transfer for consumer electronics

This paper presents an adaptive technique to enhance the efficiency of magnetic resonance based wireless power transfer system for future portable consumer electronics. In order to transfer energy to mobile devices, asymmetric coupling resonators with larger sizes of coils in a transmitter than thos...

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Bibliographic Details
Published in:IEEE transactions on consumer electronics 2012-05, Vol.58 (2), p.327-332
Main Authors: Huy Hoang, Seunggyu Lee, Youngsu Kim, Yunho Choi, Bien, F.
Format: Article
Language:English
Subjects:
Adaptive systems
adaptive technique
Coils
Consumer electronics
Couplings
Electronics
Magnetic resonance
Noise levels
portable consumer electronics
Power transfer
power transmission
Receivers
Receiving
Resonant frequency
Resonators
Wireless communication
Wireless power transfer
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Summary:This paper presents an adaptive technique to enhance the efficiency of magnetic resonance based wireless power transfer system for future portable consumer electronics. In order to transfer energy to mobile devices, asymmetric coupling resonators with larger sizes of coils in a transmitter than those in a receiver are exploited. By changing a coupling coefficient between coils only in the transmitting side, the system performance increases significantly. An experiment setup has been developed, and the S 21 parameter has been measured showing 3.3 dB improvement of system using the adaptive technique at a distance of 65 cm. An important finding is that the technique is also effective in case of multiple receiving coils. The measured performance was improved by roughly 1 dB with the use of the adaptive technique.
ISSN:0098-3063
1558-4127
DOI:10.1109/TCE.2012.6227430