Design of high frequency (MHz) planar pot-core transformer

摘要

High-frequency planar transformers are widely used in many electronics converters, such as inverters, drives, power supplies, and resonant converters. The design process of the high-frequency planar transformer is very complicated because of high-frequency interaction between the windings due to which numerous problems persist, namely: (a) leakage inductance, (b) skin and proximity effect, and (c) complexity of the magnetic circuit. In this regard, this paper emphasizes on the Finite Element Method (FEM) that addresses the aforementioned problems. The FEM model of the high frequency planar Pot-Core transformer is designed in two-dimensional (2D) axial symmetry using COMSOL Multiphysics Software. Moreover, the mathematical modeling, meshing aspects and combination with electrical circuit interface are examined for MHz level high-frequency Planar Pot-Core Transformer.