Title :
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
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;
Conference_Titel :
Environmental Electromagnetics (CEEM), 2012 6th Asia-Pacific Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-0030-8
DOI :
10.1109/CEEM.2012.6410628
