Contents I. Introduction
The simulation of non-linear magnetic fields requires reliable hysteresis models in the design phase of any electromagnetic device. Many commercial power supplies use E-cores transformers because of their low-cost and ease of manufacturing. For this reason, a vector hysteresis model is necessary to accurately simulate the time-dependent fields, especially inside devices containing edges. To this aim, mostly the well-known Preisach model [1] and Jiles-Atherton (JA) model [2] are used. However, both of them are scalar by nature and their vectorial extensions [3] do not provide a real physical foundation. On the other hand, the energy-based model (EBM) [4] – [5] – [6] relies on thermodynamic principles and it is readily vectorial. In light of the desirable properties of the EBM, this study aims to verify the vectorial aspect of this hysteresis model on a practical application, a E-E core transformer, made of soft ferrite, subject to a time-varying magnetic field generated by two coils. The paper is organized as follows: in Section II , the experimental setup and the Finite Element (FE) simulations are described. In Section III , the EBM is used to simulate the magnetic behaviour of the soft magnetic material core, reproducing experimental data. Section IV contains a deeper analysis to the obtained results. Finally, conclusion and perspectives are presented in Section V .
