Estimation of relative magnetostriction and Maxwell´s forces in stacked Grain Oriented steel structures

Vibrations and noise in transformers core have two main origins: the Maxwell´s forces, located in the corners, and the magnetostriction inside magnetic steel. In this paper, these two phenomena are differentiated and analyzed and analyzed using a test bench, which allows comparing the vibrations of two different annular structures. In the first case only the magnetostriction occurs, whereas the second case is submitted to both the magnetostriction and the Maxwell´s forces.