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Class E Power Amplifiers using High-Q Inductors for Loosely Coupled Wireless Power Transfer System
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 Title & Authors
Class E Power Amplifiers using High-Q Inductors for Loosely Coupled Wireless Power Transfer System
Yang, Jong-Ryul; Kim, Jinwook; Park, Young-Jin;
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A highly efficient class E power amplifier is demonstrated for application to wireless power transfer system. The amplifier is designed with an L-type matching at the output for harmonic rejection and output matching. The power loss and the effect of each component in the amplifier with the matching circuit are analyzed with the current ratio transmitted to the output load. Inductors with a quality factor of more than 120 are used in a dc feed and the matching circuit to improve transmission efficiency. The single-ended amplifier with 20 V supply voltage shows 7.7 W output power and 90.8% power added efficiency at 6.78 MHz. The wireless power transfer (WPT) system with the amplifier shows 5.4 W transmitted power and 82.3% overall efficiency. The analysis and measurements show that high-Q inductors are required for the amplifier design to realize highly efficient WPT system.
Class E power amplifier;High efficiency;High quality-factor;L-type matching circuit;Loosely coupled wireless power transfer system;
 Cited by
PRT 차량의 무선급전 시스템 설계 및 구현,강석원;정락교;변윤섭;엄주환;김백현;

디지털융복합연구, 2014. vol.12. 11, pp.289-298 crossref(new window)
Operation of battery-less and wireless sensor using magnetic resonance based wireless power transfer through concrete, Smart Structures and Systems, 2016, 17, 4, 631  crossref(new windwow)
High-Order Resonant Converter Topology With Extremely Low-Coupling Contactless Transformers, IEEE Transactions on Power Electronics, 2016, 31, 3, 2347  crossref(new windwow)
Design and Implementation of Wireless Power Transfer System for a Personal Rapid Transit (PRT) Vehicle, Journal of Digital Convergence, 2014, 12, 11, 289  crossref(new windwow)
A Reconfigurable Resonant Coil for Range Adaptation Wireless Power Transfer, IEEE Transactions on Microwave Theory and Techniques, 2016, 1  crossref(new windwow)
Wide-Air-Gap Transformer Model for the Design-Oriented Analysis of Contactless Power Converters, IEEE Transactions on Industrial Electronics, 2015, 62, 10, 6345  crossref(new windwow)
A. N. Laskovski, and M. R. Yuce, "Class-E selfoscillation for the transmission of wireless power to implants," Sensors and Actuators: A. Physical, vol. 171, no. 2, pp. 391-397, Nov. 2011. crossref(new window)

A. V. Grebennikov, "Switched-mode rf and microwave parallel circuit class E power amplifiers," Int. J. RF Microw. Computer-Aided Eng., vol. 14, no. 1, pp. 21-35, Jan. 2004. crossref(new window)

W. Chen, R. A. Chinga, S. Yoshida, J. Lin, C. Chen, and W. Lo, "A 25.6 W 13.56 MHz wireless power transfer system with a 94% efficiency GaN class-E power amplifier," Proc. IEEE MTT-S Int. Microw. Symp., Montreal, Canada, pp. 1-3, Jun. 2012.

J.-R. Yang, H.-C. Son, and Y.-J. Park, "A class E power amplifier with coupling coils for a wireless power transfer system," Progress In Electro-magn. Research C, vol. 35, pp. 13-22, 2013. crossref(new window)

M. K. Kazimierczuk, RF Power Amplifiers, New York, NY: John Wiley & Sons Inc., 2008.

C.-H. Li, and Y.-O. Yam, "Maximum frequency and optimum performance of class E power amplifiers," IEE Proc. Circuits Devices Syst., vol. 141, no. 3, Jun. 1994.

W. B. Kuhn, and A. P. Boutz, "Measuring and reporting high quality factors of inductors using vector network analyzers," IEEE Trans. Microw. Theory Techn., vol. 58, no. 4, pp. 1046-1055, May 2010. crossref(new window)

J. Kim, H.-C. Son, D.-H. Kim, and Y.-J. Park, "Impedance matching considering cross coupling for wireless power transfer to multiple receivers," Proc. IEEE MTT-S Wireless Power Transfer Conf., Perugia, Italy, pp. 226-229, May 2013.