Interior Permanent Magnet (IPM) machines are widely adopted in traction applications due to their high efficiency, good power density, and wide operating speed range. To improve power density, a common strategy is to increase the rotating speed, leading to mechanical issues and compromising structural integrity. In this context, this thesis focuses on the optimization of an IPM motor, implementing a multi-physical design optimization, that accounts for both magnetic and structural objectives. The study starts from a reference motor, which is used as design baseline. An initial optimization was carried out by considering only the rotor design variables, with the aim of obtaining a new motor configuration while keeping the original stator.