Copper losses evaluation in multi-strands conductors Formal solution based on the magnetic potential
Résumé
the paper describes the application of a brand new
approach to evaluate magneto harmonic effects in round
geometries. Largely employed regular modeling approaches such
as Dowell or homogenization methods show important lacks of
accuracy for 2D modeling. They are not able to reflect many
physically existing phenomena like side effects and empty layers
of conductors e.g, what require Finite Elements simulation. New
proposed analytical model brings all FEM simulation capabilities
and often outrivals them for high frequencies and computing
performance. Any geometry of stacked conductors can be
simulated and all electromagnetic values can be retrieved in 2D
space (potential vector, current density, electric and magnetic
field). The mathematical basics are reminded, then the extension
for several conductors in 2D space without any meshing is
presented as well as comparisons with Finite Element analysis
results are shown.