Title :
High Frequency Planar Transformer (HFPT) for Universal Contact-Less Battery Charging Platform
Author :
Panchal, C. ; Jun-Wei Lu
Author_Institution :
Griffith Sch. of Eng., Griffith Univ., Brisbane, QLD, Australia
Abstract :
High frequency planar transformer (HFPT) is an up-and-coming technology which can be used for designing a contact-less battery charging platform. In this paper, fractal-based high frequency planar transformers are presented with two different structures: 4-to-1 and 16-to-4 turn ratio. Because they are PCB-based transformers, two cases of 0.8 mm and 1.6 mm thickness were investigated. A finite-element method has been used to calculate the magnetic field. LLC resonant converter has been designed to improve the conversion efficiency. The voltage ratio has been measured with and without a capacitor at the primary side. The winding with a capacitor can increase the efficiency without any distortion and harmonics.
Keywords :
battery chargers; capacitors; finite element analysis; high-frequency transformers; inductive power transmission; printed circuits; resonant power convertors; LLC resonant converter; PCB-based transformers; capacitor; finite element method; fractal-based HFPT; high-frequency planar transformer; magnetic field; size 0.8 mm; size 1.6 mm; universal contactless battery charging platform; Batteries; Capacitors; Fractals; Magnetic domains; Magnetic noise; Magnetic shielding; Windings; Contact-less battery charging; finite-element method (FEM); fractal winding; high frequency planar transformer (HFPT);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2156768
