Abstract
This paper proposes a topology optimization method for high power motors, which is used in hybrid electric vehicles. The Permanent Magnet Synchronous motor (PMSM) is often used in hybrid electric vehicles, and its performances directly affect to performances of hybrid electric vehicles. Therefore, it is valuable to research topology optimization of PMSM. Although there are a few research papers discussing topology optimization of PMSM, these researches consider only torque performances. However, we consider that mechanical stiffness to hold permanent magnets should be also considered. If we consider only torque performances and ignore the mechanical stiffness, it will be possible to yield invalid optimal design which is meaningless in structural engineering viewpoints. In this paper, therefore, we propose a topology optimization method for PMSM, in which both torque and mechanical stiffness are maximized. In the proposed method, material distribution of the laminated electrical steel sheet of the rotor is optimized on the basis of the density method. The usefulness of the proposed method is demonstrated using some numerical examples.
