Frequency and time domain homogenization of laminated magnetic cores and windings in FE models of high‐frequency electromagnetic devices

Abstract

Purpose

To review and discuss recently proposed homogenization methods for laminated magnetic cores and multi‐turn windings in FE models of electromagnetic devices.

Design/methodology/approach

The frequency‐domain homogenization is based on the adoption of complex and frequency‐dependent material characteristics (e.g. reluctivity) in the homogenized domain. The value of the complex quantity is obtained analytically or by means of a simple 2D FE model. The time‐domain counterpart requires the introduction of additional unknowns and equation.

Findings

The homogenization methods allow to take into account the global eddy current effect in the individual laminations and wires, with a reasonable precision and computational cost.

Research limitations/implications

The homogenization methods have been validated numerically, i.e. by comparison with brute‐force FE computations where the eddy current effects are directly and accurately taken into account. Experimental validation should follow.

Originality/value

The analogy between the homogenization of laminated cores and windings has been evidenced.

Citation

Gyselinck, J. and López‐Fernández, X.M. (2006), "Frequency and time domain homogenization of laminated magnetic cores and windings in FE models of high‐frequency electromagnetic devices", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 25 No. 4, pp. 779-791. https://doi.org/10.1108/03321640610683999