Optimizing ferromagnetic characteristics to reduce Newton iterations

• Uwe Pahner ^[1] ; Ronnie Belmans ^[1] ; Kay Hameyer ^[1]
  1. [1] KU Leuven

     KU Leuven

     Arrondissement Leuven, Bélgica

     
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 18, Nº 4, 1999, págs. 629-637
• Idioma: inglés
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• Resumen

  • The standard Newton iteration scheme to solve a non‐linear system of equations obtained from the finite element methods is based on the updating of the field dependent element reluctivity. Usually, the manufacturer of the ferromagnetic material provides a BH‐characteristic as diagram or in the form of a table of data samples. The influence of the material properties, in particular their accurate numerical representation, is significant for the rate of convergence during the Newton iterations. Here, a numerical optimization aiming at a technically smooth non‐linear characteristic is performed to obtain a higher rate of convergence of the Newton iteration scheme.