Comparison between two approaches to model induction machines with skewed slots

To study electric machines with skewed slots, it is necessary to use 3D mod els, However, to limit computation time, some approaches based on 2D or 2D- 3D models are proposed. In this paper, we compare both approaches. The firs t one is based on a 2D sliced model and the second one, on a 3D using the 2 D-invariant hypothesis. In both models, we take into account the coupling w ith the electric circuit, the magnetic non linearity and the mechanical mot ion. The results obtained are compared to experimental ones.