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Author Mecke, R. ♦ Rathge, C.
Sponsorship IEEE Power Electon. Soc
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2004
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Resonant frequency ♦ Resonant inverters ♦ Magnetic resonance ♦ Schottky diodes ♦ Contacts ♦ Air gaps ♦ Silicon carbide ♦ Assembly ♦ Capacitors ♦ Zero current switching
Abstract The paper investigates the influence of geometrical and electrical parameters on energy transmission through air gaps of several hundred millimetres. The transferable electric power and the efficiency of magnetic assemblies with large air gaps can be considerably improved by using higher transmission frequencies in the range of several hundred kilohertz. Contactless energy transmission systems operate at resonance. With a proper choice of the resonance capacitors on the primary and secondary side, the contactless system represents an ohmic load for the primary inverter. Therefore switching events take place at zero current (ZCS) without auxiliary commutation elements, which is an important precondition for reaching higher transmission frequencies. For this application a special inverter was developed. The phase-shifted controlled bridge at the primary side is equipped with IGBT and freewheeling SiC Schottky diodes. Because of their ultra low reverse recovery charge, the operation behaviour is much better compared to fast Si diodes. The different switching events of the inverter with freewheeling SiC Schottky diodes are investigated in detail. An experimental arrangement transfers an electric power of 1 kW through an air gap of 300 mm. At a 100 kHz transmission frequency the overall efficiency, including magnetic and power electronic components, is greater than 80%.
Description Author affiliation: Inst. f. Autom. u. Kommunikation, Magdeburg, Germany (Mecke, R.; Rathge, C.)
ISBN 0780383990
ISSN 02759306
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2004-06-20
Publisher Place Germany
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 415.21 kB
Page Count 7
Starting Page 1737
Ending Page 1743

Source: IEEE Xplore Digital Library