Magnetostriction force spectrum in power transformer

Abstract

The paper deals with the numerical method describing the calculation of forces acting inside the three phase transformer core and having the magnetostriction nature. All calculations assume that 2D fields of magnetic flux density are available obtained by time-stepping approach combined with circuit analysis. The equations linking flux distribution in space with force components in chosen volumes of interest are given. The method is illustrated with few diagrams showing the amplitude and phase relationships of dominated spectral components.