Integration of a Class-E low DV/DT rectifer in a wireless power transfer system

Author

Kkelis, George ; Lawson, J. ; Yates, David C. ; Pinuela, M. ; Mitcheson, Paul D.

Author_Institution

Electr. & Electron. Eng., Imperial Coll. London, London, UK

fYear

2014

fDate

8-9 May 2014

Firstpage

72

Lastpage

75

Abstract

This paper presents the integration of a Class-E rectifier into a high frequency semi-resonant inductive power transfer system. The rectifier is used to rectify the 5.56 MHz ac output of the resonant receiving coil. End to end efficiency´s exceeding 69 % are demonstrated while transferring 120 W with 30 cm coil spacing. Rectifier topologies were reviewed with their applicability to high frequency resonant IPT as a focus. A voltage driven series inductor low dv/dt resonant Class-E rectifier was selected for integration into an existing inductive power transfer system. System and rectifier efficiency is shown at 30 cm and 40 cm coil separation. Rectifier efficiency is estimated as 90.9% on the basis of the loss in overall system efficiency when using the rectifier.

Keywords

inductive power transmission; inductors; rectifying circuits; class-E low DT rectifier; class-E low DV rectifier; coil separation; frequency 5.56 MHz; high frequency resonant IPT; inductive power transfer system; power 120 W; rectifier topologies; resonant receiving coil; size 30 cm; size 40 cm; voltage driven series inductor; wireless power transfer system; Capacitors; Coils; Equations; Inductors; Mathematical model; Rectifiers; Resonant frequency; Class-E rectifier; IPT; Inductive power transfer; Wireless power transfer; semi-resonant;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Power Transfer Conference (WPTC), 2014 IEEE

Conference_Location

Jeju

Type

conf

DOI

10.1109/WPT.2014.6839597

Filename

6839597