Metrological and numerical Validation of electromagnetic Sub-Model Techniques for 3D-FEM

Sub-model approaches for electromagnetic finite element analyses offer opportunities of efficiently analyzing smaller regions in high detail influenced by magnetic field arising over much larger domains. A novel sub-model technique allowing transient analysis with non-linear materials in three-dimensional space is validated through comparisons with the results obtained by measurements and by employing conventional finite element approaches. As an example, an end-zone of a turbogenerator is investigated by studying different open and short circuit conditions. Comparisons are carried out in time and frequency domains.