Improved High-Frequency Planar Transformer for Line Level Control (LLC) Resonant Converters
Abstract
An improved high-frequency magnetic-integrated planar transformer is demonstrated. Compared with conven- tional 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 ?nite-element model is used to investigate the eddy current losses and the adjustment of the leakage inductance.
Journal Title
IEEE Magnetics Letters
Volume
4
Copyright Statement
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Subject
Physical sciences
Engineering