Simultaneous Optimization of Magnet and Flux Barrier in IPMSM by Differential Evolution

Abstract

Recently, one of the most important problems is energy shortage. Therefore, it is required the high efficiency electromagnetic device like motors. One of them is interior permanent magnetic synchronous motor (IPMSM). It has a high degree of freedom of shape design because permanent magnets are placed in the interior of a rotor. This paper presents optimal design method of a rotor in IPMSM by differential evolution (DE). In the proposed method, magnets have design variables which are its width, length and coordinate. Flux barriers are expressed polygons which are composed by some nodes. These representations are used in simultaneous optimization of them with DE. Authors investigate usefulness of the proposed method by comparison of simulation results.