Calculation of Magnetostriction Induced Deformations in Grain Oriented and Non-Oriented Silicon Iron Transformer Cores Thanks to an Imposed Magnetic Flux Method

摘要

This work focuses on the development of an algorithm for the prediction of a transformer core deformation, using a magneto-mechanical approach. An imposed magnetic flux method coupled with finite elements is employed for the magnetic resolution. The constitutive law of the material uses a multi-scale model describing both magnetic and magnetostrictive anisotropies. Magnetostriction is introduced as an input free strain of a mechanical problem to get the deformation and displacement fields. The numerical process is applied to compare the deformations of a given magnetic circuit made of Grain Oriented and Non-Oriented FeSi.