Magnetic measurements on two Fe Si samples

Abstract

This study investigates the magnetic characterization of two silicon-iron materials: Fe Si GO (grain-oriented) and Fe Si NO (non-grain-oriented), using an experimental magnetic measurement bench at the Polytechnic Military School in Algiers. Reproducibility tests performed on Fe Si GO showed highly consistent results, with losses at B = 1.5 T recorded as 1.133 W/kg, 1.132 W/kg, and 1.133 W/kg for the three tests, while Fe Si NO exhibited losses of 5.119 W/kg, 5.119 W/kg, and 5.118 W/kg under identical conditions, indicating maximum deviations of only 0.001 W/kg for each material. Comparison with supplier data revealed slight deviations; for Fe Si GO at B = 1.5 T, the experimental value was 1.133 W/kg compared to the supplier’s 1.041 W/kg, while for Fe Si NO it was 5.20 W/kg compared to 5.119 W/kg. Frequency influence tests demonstrated significant increases in losses with frequency. For Fe Si GO at B = 1.5 T, losses rose from 0.063 W/kg at 8 Hz to 7.57 W/kg at 200 Hz, whereas for Fe Si NO at B = 1.5 T, losses increased from 0.39 W/kg at 8 Hz to 14.17 W/kg at 150 Hz. These results confirm the reliability of the measurement setup and provide valuable experimental data to support further modelling and optimisation of electrical machine design.