TY - JOUR
T1 - Rf wireless power transfer using integrated inductor
AU - Pardue, Colin Andrew
AU - Bellaredj, Mohamed Lamine Faycal
AU - Torun, Hakki Mert
AU - Swaminathan, Madhavan
AU - Kohl, Paul
AU - Davis, Anto Kavungal
N1 - Funding Information:
Manuscript received April 11, 2018; revised September 20, 2018; accepted November 1, 2018. Date of publication November 14, 2018; date of current version May 7, 2019. This work was supported by the Power Delivery for Electronic Systems Consortium, Georgia Institute of Technology, USA. Recommended for publication by Associate Editor M. Cases upon evaluation of reviewers’ comments. (Corresponding author: Colin Andrew Pardue.) C. A. Pardue, M. L. F. Bellaredj, H. M. Torun, M. Swaminathan, and A. K. Davis are with the Department of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332 USA (e-mail: [email protected]).
Publisher Copyright:
© 2011-2012 IEEE.
PY - 2019/5
Y1 - 2019/5
N2 - Wireless power transfer (WPT) is an ideal power delivery solution for many light-load applications, such as for the Internet of Things. A regulated solution for WPT may utilize a power distribution unit (PDU). Previous works have designed planar inductors for integration with switched-inductor buck regulators, but these inductors will not be as efficient for light-load applications. This paper reevaluates the inductor loss for light-load applications by taking into account the frequency spectrum of the inductor current. Using this revised analysis, a planar inductor with screen printed NiZn ferrite epoxy composite magnetic core is designed for an RF near-field coupling system with 1-10-mW load power. In measurement with a 6-MHz buck converter, the PDU with designed inductor demonstrated up to 3% improved efficiency compared to surface-mount technology inductor in the pulse-frequency modulation mode and pulsewidth modulation mode. The designed embedded inductor was subsequently demonstrated in an integrated, compact RF near-field coupling system with peak 43% system efficiency.
AB - Wireless power transfer (WPT) is an ideal power delivery solution for many light-load applications, such as for the Internet of Things. A regulated solution for WPT may utilize a power distribution unit (PDU). Previous works have designed planar inductors for integration with switched-inductor buck regulators, but these inductors will not be as efficient for light-load applications. This paper reevaluates the inductor loss for light-load applications by taking into account the frequency spectrum of the inductor current. Using this revised analysis, a planar inductor with screen printed NiZn ferrite epoxy composite magnetic core is designed for an RF near-field coupling system with 1-10-mW load power. In measurement with a 6-MHz buck converter, the PDU with designed inductor demonstrated up to 3% improved efficiency compared to surface-mount technology inductor in the pulse-frequency modulation mode and pulsewidth modulation mode. The designed embedded inductor was subsequently demonstrated in an integrated, compact RF near-field coupling system with peak 43% system efficiency.
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U2 - 10.1109/TCPMT.2018.2881273
DO - 10.1109/TCPMT.2018.2881273
M3 - Article
AN - SCOPUS:85056605065
SN - 2156-3950
VL - 9
SP - 913
EP - 920
JO - IEEE Transactions on Components, Packaging and Manufacturing Technology
JF - IEEE Transactions on Components, Packaging and Manufacturing Technology
IS - 5
M1 - 8534317
ER -