Soft magnetic materials are continuously developed and improved in order to minimize their intrinsic operating energy losses. Nowadays, specific nanocrystalline and amorphous alloys are commonly used as magnetic core of different transformers that work at high frequencies and with magnetic flux densities values close to the saturation region. These particular operating conditions make difficult their experimental investigations mainly due to the encountered heating problems. Accordingly, this paper suggest a procedure that predicts the energy losses of a nanocrystalline sample of commercial FINEMET-D using experimental data up to 300 mT and 900 kHz and an elliptical developed model. The latter uses specific parameters evaluated from an searching fitting procedure. The results shows that, comparative to the experimental data (less than 300 mT), the losses prediction (up to 790 mT) estimated with the proposed model are to be considered

Keywords: Soft magnetic materials, Magnetic modeling, Energy losses