Analysis of impedance matched circuit for wireless power transfer

Ong, Andrew, Sampath, J.P.K., Beng, Gilbert Foo Hock, Kheng, Tan Yen, Vilathgamuwa, D.M., & Bac, Nguyen Xuan (2014) Analysis of impedance matched circuit for wireless power transfer. In Proceedings of the 40th Annual Conference of IEEE Industrial Electronics Society (IECON 2014), IEEE, Sheraton Hotel Dallas, Dallas, TX, pp. 2965-2970.

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Typical wireless power transfer systems utilize series compensation circuit which is based on magnetic coupling and resonance principles that was first developed by Tesla. However, changes in coupling caused by gap distance, alignment and orientation variations can lead to reduce power transfer efficiencies and the transferred power levels. This paper proposes impedance matched circuit to reduce frequency bifurcation effect and improve on the transferred power level, efficiency and total harmonic distortion (THD) performance of the series compensation circuit. A comprehensive mathematical analysis is performed for both series and impedance matched circuits to show the frequency bifurcation effects in terms of input impedance, variations in transferred power levels and efficiencies. Matlab/Simulink results validate the theoretical analysis and shows the circuits’ THD performance when circuits are fed with power electronic converters.

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ID Code: 82434
Item Type: Conference Paper
Refereed: Yes
Keywords: Frequency bifurcation effect, Input impedance, Magnetic resonance, Series compensation, Wireless power transfer
DOI: 10.1109/IECON.2014.7048931
ISBN: 9781479940325
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 IEEE
Deposited On: 12 Mar 2015 00:35
Last Modified: 12 Mar 2015 22:45

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