Estimation of the winding losses of Medium Frequency Transformers with Litz wire using an equivalent permeability and conductivity method

Abstract

To achieve the highest efficiency of a Dual Active Bridge converter, it is crucial to accurately calculate the winding losses of the Medium Frequency Transformer (MFT) situated inside it. In this article, an effective numerical method for calculation of the copper losses in MFTs with rectangular-shaped windings made up of Litz wire, is utilized and practically verified.