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Experimental demonstration of multi-watt wireless power transmission to ferrite-core receivers at 6.78 MHz

Published online by Cambridge University Press:  11 December 2018

Stasiu Chyczewski ,
Seahee Hwangbo ,
Yong-Kyu Yoon  and
David P. Arnold Open the ORCID record for David P. Arnold [Opens in a new window]
Stasiu Chyczewski
Affiliation:
Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA
Seahee Hwangbo
Affiliation:
Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA
Yong-Kyu Yoon
Affiliation:
Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA
David P. Arnold*
Affiliation:
Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA
*
Corresponding author: D. P. Arnold Email: [email protected]
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Abstract

This article experimentally explores the use of ferrite cores to miniaturize the receivers used for inductive wireless power transmission. A variety of receivers were designed and fabricated using cylindrical ferrite cores, ranging in total size from 47 to 687 mm3. The receivers were tested with a commercially available transmitter operating under the Rezence (Air Fuel Alliance) standard at 6.78 MHz. Experiments measured performance of the receivers in terms of their maximum power draw and efficiency as functions of the receiver load and transmission distance. Experimental results showed that ferrite-core receivers could draw multiple watts of power with end-to-end efficiencies in excess of 50%. While the efficiencies are less than a commercially planar coil receiver, the ferrite-core receivers offer a >50% reduction in mass and >90% reduction in footprint. As a result, the receiver power densities reach up to 17.6 W/cm3, which is a 25× improvement over previously reported work. This effort confirms the viability of ferrite-core receivers for size- and weight-constrained applications.

Keywords

Ferrite coreWireless power
Type
Research Article
Information
Wireless Power Transfer , Volume 6 , Issue 1 , March 2019 , pp. 17 - 25
Copyright
Copyright © Cambridge University Press 2018 

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References

REFERENCES

[1]Mur-Miranda, J.O. et al. : Wireless power transfer using weakly coupled magnetostatic resonators. 2010 IEEE Energy Conversion Congress and Exposition, Atlanta, GA, 2010, 4179–4186.Google Scholar
[2]Hui, S.Y.R.; Zhong, W.; Lee, C.K.: A critical review of recent progress in mid-range wireless power transfer. IEEE Trans. Power Electron., 29 (9) (2014), 4500–4511.Google Scholar
[3]Kurs, A. et al. : Wireless power transfer via strongly coupled magnetic resonances. Science, 83 (2007), 83–86.Google Scholar
[4]Hui, S.Y.R.: Magnetic resonance for wireless power transfer (a look back). IEEE Power Electron. Mag., 3 (1) (2016), 14–31.Google Scholar
[5]Cook, N.P.; Sieber, L.; Widmer, H.; Schwaninger, P.: Ferrite antennas for wireless power transfer. U.S. Patent 8,253,278, issued August 28, 2012.Google Scholar
[6]Cook, N.P.; Schwaninger, P.; Widmer, H.: Ferrite antennas for wireless power transfer. U.S. Patent 8,487,479, issued July 16, 2013.Google Scholar
[7]Theilmann, P.T.; Asbeck, P.M.: An analytical model for inductively coupled implantable biomedical devices with ferrite rods. IEEE Trans. Biomed. Circuits Syst., 3 (2009), 43–52.Google Scholar
[8]Delhaye, T.P. et al. : High-efficiency wireless power transfer for mm-size biomedical implants. 2017 IEEE SENSORS Conf., Glasgow, UK, October 2017, 1–3.Google Scholar
[9]Freeman, D.K. et al. : A sub-millimeter, inductively powered neural stimulator. Front. Neurosci., 11 (2017), article 659, 12 pages.Google Scholar
[10]Carta, R.; Thoné, J.; Puers, R.: A wireless power supply system for robotic capsular endoscopes. Sens. Actuators, A, 162 (2010), 177–183.Google Scholar
[11]Wang, M.; Feng, J.; Shi, Y.; Shen, M.: Demagnetization weakening and magnetic field concentration with ferrite core characterization for efficient wireless power transfer. IEEE Trans. Ind. Elec., 66 (3) (2018), 1842–1851.Google Scholar
[12]Goodenough, J.B.: Summary of losses in magnetic materials. IEEE Trans. Magn., 38 (2002), 3398–3408.Google Scholar
[13]Yan, Z.; Ai-ming, S.: Simplified ferrite core loss separation model for switched mode power converter. IET Power Electron., 9 (3) (2016), 529–535.Google Scholar
[14]Fair-Rite Products Corp. “61 Material Data Sheet” [Online]. Available: http://www.fair-rite.com/61-material-data-sheet/.Google Scholar
[15]Coil32. The Coil inductance Calculator. [Online]. Available: http://coil32.net/.Google Scholar
[16]Medhurst, R.G.: H.F. resistance and self-capacitance of single-layer solenoids – Part I, Wireless Engineer, February 1947, 35–43.Google Scholar
[17]Medhurst, R.G.: H.F. resistance and self-capacitance of single-layer solenoids – Part II, Wireless Engineer, March 1947, 80–92.Google Scholar
[18]Technical Working Committees (TWC 1 + 2) of the Alliance for Wireless Power (A4WP). “A4WP Wireless Power Transfer System Baseline System Specification (BSS) v 1.2.1,” A4WP Standard, 2014.Google Scholar