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- W3092128946 abstract "For wireless power transfer (WPT) in mobile applications, the receiving side is usually embedded inside the devices, which makes the heating issue quite challenging, especially at high operating frequency (such as 6.78 MHz) and high power levels. High-frequency synchronous resonant rectification is expected to significantly reduce the power loss on the receiving side and thus improve the rectifier power density. This article proposes a universal optimal drain-source voltage (ODSV) tracking scheme for synchronous resonant rectifier in megahertz (MHz) WPT applications. The ODSV tracking enables the switches in the synchronous rectifiers work at the same switching operation with that of the diodes in the passive rectifiers. Thus, the soft-switching operation can be maintained with minimized body-diode conduction. A tracking algorithm is then developed to adaptively achieve the optimal operation of the synchronous rectifier under varying loading conditions. Finally, the proposed ODSV tracking scheme is implemented in a GaN-based Class E full-wave synchronous rectifier and tested in an experimental 6.78-MHz WPT system. A dc-dc efficiency of 91.6% is achieved under the output power of 120 W. The efficiency of the synchronous rectifier is 97.0% and the rectifier power density can be as high as 1212 W/in <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sup> ." @default.
- W3092128946 created "2020-10-15" @default.
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- W3092128946 date "2021-05-01" @default.
- W3092128946 modified "2023-09-28" @default.
- W3092128946 title "A Universal Optimal Drain–Source Voltage Tracking Scheme for Synchronous Resonant Rectifiers in Megahertz Wireless Power Transfer Applications" @default.
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- W3092128946 doi "https://doi.org/10.1109/tpel.2020.3029525" @default.
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