Improved High-Frequency Planar Transformer for Line Level Control (LLC) Resonant Converters

Author

water, Wayne ; Junwei Lu

Author_Institution

Sch. of Eng., Griffith Univ., Griffith, NSW, Australia

Volume

4

fYear

2013

fDate

2013

Firstpage

1

Lastpage

4

Abstract

An improved high-frequency magnetic-integrated planar transformer is demonstrated. Compared with conventional planar integrated magnetics, the improved structure has better leakage inductance adjustment. Also, instead of expensive printed circuit board windings on the primary side, multistrand Litz wires are used. The transformer is fabricated with two common EE shape magnetic cores along with magnetic insertions placed between the primary and secondary windings outside the main core. A three-dimensional finite-element model is used to investigate the eddy current losses and the adjustment of the leakage inductance.

Keywords

eddy current losses; finite element analysis; high-frequency transformers; inductance; resonant power convertors; EE shape magnetic cores; LLC resonant converters; eddy current losses; improved high-frequency magnetic-integrated planar transformer; leakage inductance adjustment; line level control resonant converters; magnetic insertions; multistrand Litz wires; three-dimensional finite-element model; Inductance; Magnetic resonance; Prototypes; Transformer cores; Voltage measurement; Windings; Magnetic instruments; finite-element methods; integrated circuit fabrication; transformers;

fLanguage

English

Journal_Title

Magnetics Letters, IEEE

Publisher

ieee

ISSN

1949-307X

Type

jour

DOI

10.1109/LMAG.2013.2284767

Filename

6662385