Nowadays, the electrical machines are designed to operate at high frequencies (up to kHz). Therefore, is important for manufacturers to predict the power losses of these equipments using simple tools. Thus, this paper suggests a solution considering two algebraic models with hysteresis parameters for estimating the specific power losses of FeSi sheets. The models use fitting values of coercivity force and remanence points necessary in representing the hysteresis loop for higher frequency values. Two sorts of non-oriented grain (N.O.) electrical sheets are selected for determining the fitting parameters considering the experimental data provided by a Single Sheet Tester (SST). The measurements are limited to 200 Hz, but the models could also manage to estimate the parameters and the specific power losses for higher frequencies up to 1 kHz.

Keywords: Soft magnetic materials, Hysteresis parameter modelling, Algebraic models