In this paper, different ways to compute electromagnetic source fields for non-meshed coils will be described for magnetic vector potential A and electric scalar potential V formulation (A − V formulation). The originality of this paper is demonstrated by the source computations for A − V formulation with non-meshed coils. Usually, coils for A − V formulation are meshed, and non-meshed coils are studied with reduced magnetic vector potential A r and electric scalar potential V formulation (A r − V formulation). Different source computations for A − V formulation will be applied on an induction machine with non-meshed coils.
The rise of shape and topology optimization techniques has opened new possibilities to find innovative designs for electromagnetic devices such as actuators or rotating machines. This paper provides an analytical sensitivity analysis for the magnetic force and torque based on the virtual work principle and suitable for those kinds of optimization.
In recent years edge finite element method has become quite popular in modeling the three-dimensional rotating electrical machine due to its ability to represent the physical behavior of field along interface correctly. However, modeling becomes complex when significant mesh distortion occurs along a sliding surface due to movement. A remeshing step is needed, which increases computational cost. In order to avoid remeshing, efficient numerical methods have already been developed to model movement in the three-dimensional rotating electrical machine under edge finite element method. Nevertheless, very little research has been carried out on comparing these methods. The main objective of this paper is to compare the edge-based interpolation and mortar edge element method. To improve the accuracy of edge-based interpolation for tetrahedral mesh, we propose an improved strategy. Numerical results illustrate the accuracy, robustness and performance of the methods. A detailed comparison is presented based on the criteria mentioned above.
K E Y W O R D Sedge-based interpolation, edge finite element method, mortar edge element method, rotating electrical machine
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