Development of material models for the numerical computation accounting for magnetic anisotropy

  material model Copyright: © IEM

Grain oriented silicon steel sheets have a distinctive crystallographic texture. This texture leads to an anisotropic magnetization behavior. The calculation of rotating fields at the joints of power transformer cores demands the consideration of this material behavior.
At the IEM an anisotropic material model for grain oriented silicon steel sheets is developed to calculate the magnetic flux distribution inside transformers, by means of the finite element method. This energy based material model regards the crystallographic texture. The model is parameterized by measurements of Epstein specimens in different angles to the rolling direction and by means of the crystal orientation distribution function.