Contribution of Magnetostriction to Vibrations and Noises in Electrical Machines

FEM are used to model magnetostriction phenomena in electrical machines, the modeling method take into account direct and inverse effects, magnetostriction bellow an even function depends on magnetic flux density and quasi-independent on applied mechanical stress, an iterative method is used to solve both magneto-static and elasto-static equations. In electrical machines, vibratory behaviour depends on the modal's characteristics and its mechanical structures. The vibrations of mechanical structure have maximal amplitude when its frequencies are particular. In this paper, several modal shapes of stator and their resonance frequencies are calculated.