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

Karl Hollaus (Institute of Analysis and Scientific Computing, Vienna University of Technology, Vienna, Austria)
Joachim Schöberl (Institute of Analysis and Scientific Computing, Vienna University of Technology, Vienna, Austria)

Abstract

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.

Keywords

Citation

Hollaus, K. and Schöberl, J. (2015), "Multi-scale FEM and magnetic vector potential A for 3D eddy currents in laminated media", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 34 No. 5, pp. 1598-1608. https://doi.org/10.1108/COMPEL-02-2015-0090

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Publisher

:

Emerald Group Publishing Limited

Copyright © 2015, Emerald Group Publishing Limited

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