Multi-scale FEM and magnetic vector potential A for 3D eddy currents in laminated media

• Karl Hollaus ^[1] ; Joachim Schöberl ^[1]
  1. [1] Vienna University of Technology

     Vienna University of Technology

     Innere Stadt, Austria

     
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 34, Nº 5 (Special Issue: IGTE 2014), 2015, págs. 1598-1608
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Purpose – The purpose of this paper is an accurate computation of eddy currents in laminated media with minimal computer resources.

    Design/methodology/approach – Modeling each laminate of the laminated core of electrical devices requires prohibitively many finite elements (FEs). To overcome this restriction a higher order multi-scale FE method with the magnetic vector potential A has been developed to cope with 3D problems considering edge effects.

    Findings – The multi-scale FE approach facilitates an accurate simulation of the eddy current losses with minimal computer resources. Numerical simulations demonstrate a remarkable accuracy and low computational costs. The effect of regularization on the results is shown.

    Practical implications – The eddy current losses are of great interest in the design of electrical devices with laminated cores.

    Originality/value – The multi-scale FE approach takes also into account of the edge effects in 3D.