Topology Optimization Based on the ON/OFF Method for Synchronous Motor

A topology optimization (TO) of synchronous motors based on the ON/OFF method to obtain practical shapes is presented in this paper. The TO using evolutionary algorithms such as genetic algorithm often yields complex shapes that are impossible to produce in an engineering sense. In the previously proposed method, lattice meshes were required for the ON/OFF method. This results in poor ability of expression for curved surfaces and restriction of mesh generation. To solve this problem, the algorithm is extended to adapt to unstructured meshes. The present method is applied to a shape optimization of synchronous motors, and optimization results show that feasible shapes are obtained and torque property is improved.