Shape Optimization of Rotating Machines Using Time-Stepping Adaptive Finite Element Method

A time-stepping adaptive finite element method is proposed for shape optimization of rotating machines. In the proposed method, different mesh-generation procedures are applied to the core and the other regions for the purpose of the iron-loss calculation. A technique for automatically separating and connecting the stator and rotor meshes is also introduced for the rotation of the rotor. The proposed method is applied for shape optimizations of permanent magnet motors to achieve the loss reduction. The necessity and usefulness of the proposed method are verified.