A Study of the Effect of Magnetostrictive on the Deformation of Steel Core in Amorphous Transformesr

This paper constructs a general mathematical model to calculate magnetic force and magnetostrictive force based on the stress tensor, the magnetostriction strain tensor, and the magnetostriction reluctivity tensor and energy density functio. Based on mathematical models, the paper investigates the magnetomechanical coupling in amorphous steel cores of the transformer caused by the magnetostrictive phenomenon by Newton-Raphson iterative method. The specific investigations into the deformation of amorphous steel core of three phase transformers by ANSYS Maxwell software are carried out. The positions where the largest deformation and displacement are located on the steel core are also pointed out. The results are fundamental for the studies of vibration of amorphous steel core transformers and the generated noises. These economic and technical issues have attracted the attention of transformer designers and operators