A Power Link Study of Wireless Non-Radiative Power Transfer Systems Using Resonant Shielded Loops
- 7 February 2012
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Circuits and Systems I: Regular Papers
- Vol. 59 (9), 2125-2136
- https://doi.org/10.1109/tcsi.2012.2185295
Abstract
This paper discusses the use of magnetically coupled resonators for midrange wireless non-radiative power transfer (WNPT). A quasi-static (circuit) model is developed to establish key measures of performance and to aid in design. The use of directly fed, resonant shielded loops for WNPT is also proposed for the first time. Two experimental WNPT systems employing shielded loops are reported. A comprehensive experimental study is performed, and the performance of the WNPT systems shows close agreement with analytical predictions and developed circuit models. With a single-turn system of loop radius 10.7 cm, power transfer efficiency of 41.8% is achieved at a loop separation of 35 cm (3.3 loop radii). When the number of turns is increased to ten, a power transfer efficiency of 36.5% is achieved at a loop separation of 56 cm (5.3 loop radii). Measured magnetic field levels in the vicinity of the WNPT systems are shown to closely agree with analytical field values.Keywords
This publication has 32 references indexed in Scilit:
- Design theory of wireless power transfer system based on magnetically coupled resonatorsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2010
- An consideration on equivalent circuit of wireless power transmissionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2010
- Simultaneous mid-range power transfer to multiple devicesApplied Physics Letters, 2010
- Design and Optimization of a Class-E Amplifier for a Loosely Coupled Planar Wireless Power SystemIEEE Transactions on Circuits and Systems II: Express Briefs, 2009
- Magnetic Resonant Coupling As a Potential Means for Wireless Power Transfer to Multiple Small ReceiversIEEE Transactions on Power Electronics, 2009
- Wireless powering of single-chip systems with integrated coil and external wire-loop resonatorApplied Physics Letters, 2008
- Two dimensional electromagnetic noise imaging system using planar shielded-loop coil arrayPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Comments on "Exact solutions of electromagnetic fields in both near and far zones radiated by thin circular loop antennas: a general representation" [with reply]IEEE Transactions on Antennas and Propagation, 2001
- Idealized operation of the class E tuned power amplifierIEEE Transactions on Circuits and Systems, 1977
- An Inductively Coupled RF System for the Transmission of 1 kW of Power Through the SkinIEEE Transactions on Biomedical Engineering, 1971