Impact of residual stress evoked by pyramidal embossing on the magnetic material properties of non-oriented electrical steel

Abstract Targeted magnetic flux guidance in the rotor cross section of rotational electrical machines is crucial for machine’s efficiency. Cutouts steel sheets are integrated guidance. These cutouts create thin structures which limit maximum achievable speed under centrifugal forces and energy density rotating machine. In this paper, embossing-induced residual stress, employing magneto-mechanical Villari effect, studied as an innovative alternative barrier design with negligible mechanical material deterioration. The overall objective to replace by embossings, increasing strength rotor. identification suitable embossing geometries, distributions methodologies local introduction stress a major challenge. This paper examines finely distributed pyramidal embossings their effect on behavior. study based simulation measurements specimen single line twenty points performed different punch forces. behavior analyzed using neutron grating interferometry sheet tester. Numerical examinations finite element analysis microhardness provide more detailed understanding interaction distribution properties. results reveal that induced affects Process parameters can be applied adjust deterioration