Abstract:
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Skin and proximity effects in single- or multi-conductor systems can notoriously affect the AC
resistance in conductors intended for electrical power transmission and distribution systems and for
electronic devices. This increase of the AC resistance raises power loss and limits the conductors’ currentcarrying
capacity, being an important design parameter. There are some internationally recognized exact
and approximated formulas to calculate the AC resistance of conductors, whose accuracy and applicability
is evaluated in this paper. However, since these formulas can be applied under a wide range of
configurations and operating conditions, it is necessary to evaluate the applicability of these models. This is
done by comparing the results that they provide with experimental data and finite element method (FEM)
simulation results. The results provided show that FEM results are very accurate and more general than
those provided by the formulas, since FEM models can be applied to a wide range of conductors’
configurations and electrical frequencies |