Finite element small-signal simulation of electromagnetic devices considering eddy currents in the laminations
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SubjectSolid modeling; Lamination; Eddy currents; Computational modeling; Three-dimensional displays; Time-domain analysis
This paper presents the validation of a small-signal finite element simulation strategy comparing different simulation approaches. At first a full 3D non-linear model in the time domain is presented. Then the small-signal strategy has been applied to the 3D model achieving a considerable reduction of computational time. In both 3D models, the eddy currents in the laminations are fully modelled. Then, in order to avoid 3D model, a 2D model has been considered. In this case, eddy currents are included adopting a homogenization technique. In the 2D case, both non-linear time domain simulations and small- signal strategy have been implemented. The results of the four considered simulation strategies are in very good agreement, proving that the small-signal simulation strategy can be profitably used in order to reduce significantly the computational cost. As an example, the paper considers a two port mutual inductor as a test model.
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