Technical Papers and Presentations

The current paper describes how a properly chosen skew angle can be used to significantly decrease the amplitude of the high and/or low frequency cogging torque components. The approach is further demonstrated with the help of FE results from COMSOL Multiphysics. The numerical analyses incorporates a COMSOL model that is similar to a combination of two examples from the AC/DC Model Library: the Generator in 2D, and the Generator with Mechanical Dynamics and Symmetry; therefore, the governing E-M equation is the same quasi-static approximation used in those models. Only 1/4th of the generator is modeled; the boundary conditions are the same as that of the latter model. However, a prescribed rotation exactly as described in the former model was used.