Abstract：One of the sources arising the vibration and noise of a large-scale generator is due to the magnetostriction effect of iron core. In order to develop the influences of magnetostrictive phenomenon of the core on vibration and noise of motor, in this paper, the magnetostrictive properties for a non-grain oriented electrical steel sheet are dealt with in detail. Based on highly precious magnetostrictive measurement equipment, the magnetostrictive loops of electrical sheet steel in the rolling direction and transverse direction are measured, and the single value curves taking into account magnetostrictive properties of electrical sheet steel is obtained. By using linear piezomagnetic equation, the mathematical model describing magnetostrictive property for the electrical steel sheet is established, in which the parameters are fitting from by measuring data. Finally, the magnetostriction model is indirectly coupled into the finite element calculation of magnetic field, and the corresponding computer program is compiled. By comparison of simulation results with the experimental ones for a simple model, it is verified that the effectiveness of both proposed magnetostriction model and finite element analysis.
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2013, Vol. 28 
