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RF Wireless Power Transfer Using Integrated Inductor.
- Source :
- IEEE Transactions on Components, Packaging & Manufacturing Technology; May2019, Vol. 9 Issue 5, p913-920, 8p
- Publication Year :
- 2019
-
Abstract
- 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21563950
- Volume :
- 9
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Components, Packaging & Manufacturing Technology
- Publication Type :
- Academic Journal
- Accession number :
- 136385910
- Full Text :
- https://doi.org/10.1109/TCPMT.2018.2881273