Investigation of flux leakages and EMC problems in wireless charging systems for EV and other mobile applications

Author

Panchal, C. ; Leskarac, D. ; Lu, Jun ; Stegen, Sascha

Author_Institution

Griffith Univ., Brisbane, QLD, Australia

fYear

2012

fDate

6-9 Nov. 2012

Firstpage

301

Lastpage

304

Abstract

High Frequency Wireless Planar Transformers (HFWPT) are an up-and-coming technology which can be used for designing an electric vehicle (EV) on board wireless battery charging platform. In this paper, HFWPTs are used to investigate the flux leakages and other EMC problems which are associated with wireless charging system´s efficiency. The HFWPT was designed using the bifilar winding concept on PCB. A LLC resonant converter has been designed to improve the conversion efficiency with a maximized air gap. Assisted by a near-field scanner, the magnetic field has been analyzed with and without a magnetic ferrite core at resonant frequency. The magnetic ferrite core in this arrangement is used to minimize flux leakages and to increase the magnetizing impedance.

Keywords

battery powered vehicles; electromagnetic compatibility; magnetic fields; magnetic flux; secondary cells; EMC problem; LLC resonant converter; PCB; bifilar winding; electric vehicle; flux leakage; high frequency wireless planar transformer; magnetic ferrite core; magnetic field; magnetizing impedance; mobile application; near-field scanner; wireless charging system; Coils; Ferrites; Magnetic cores; Magnetic field measurement; Magnetic flux leakage; Magnetic resonance; Wireless communication; Bifilar winding; Electromagnetic Compatibility (EMC); High Frequency Wireless Planar Transformer (HFWPT); Wireless Battery Charging;

fLanguage

English

Publisher

ieee

Conference_Titel

Environmental Electromagnetics (CEEM), 2012 6th Asia-Pacific Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4673-0030-8

Type

conf

DOI

10.1109/CEEM.2012.6410628

Filename

6410628