Wireless power receiver for mobile devices supporting inductive and resonant operating modes

Wireless power receiver for mobile devices supporting inductive and resonant operating modes

We demonstrate a compact wireless power receiver for mobile phones that operates either in a resonant mode at 6.78 MHz or an inductive mode in the 110 to 205 kHz range. A coil arrangement and matching network is introduced that is resonant in both frequency bands, allowing the same power conversion...

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Bibliographic Details
Published in:2014 IEEE Wireless Power Transfer Conference pp. 52 - 55
Main Authors: Satyamoorthy, Anand, Riehl, Patrick, Akram, Hasnain, Yung-Chih Yen, Yang, J.-C, Juan, Brian, Chi-Min Lee, Fu-Chi Lin
Format: Conference Proceeding
Language:English
Published: IEEE 01-05-2014
Subjects:
Coils
Inductive charging
Receivers
Rectifiers
Temperature measurement
Transmitters
Wireless Charging
Wireless communication
Wireless Power
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Summary:We demonstrate a compact wireless power receiver for mobile phones that operates either in a resonant mode at 6.78 MHz or an inductive mode in the 110 to 205 kHz range. A coil arrangement and matching network is introduced that is resonant in both frequency bands, allowing the same power conversion circuitry to operate in either mode. The receiver converts up to 5 W of AC power to a regulated 5 V supply with a peak efficiency of 84% in inductive mode and 82% in resonant mode.
DOI:10.1109/WPT.2014.6839626