This master thesis examines the mechanical performance of a prototype motor intended for traction use in a small personal car through simulation, measurement, and analysis. The interior permanent magnet synchronous motor (PMSM) is modelled and simulated using finite element analysis (FEA) and CAD (computer aided design) software. The project investigates the discrepancy between the prototype motor's measured performance and simulation results, emphasizing mechanical design and vibrations. In addition, risk assessments for the assembly process and motor operation are conducted to ensure occupational and functional safety. The study is limited by the specific prototype motor used and the accuracy of University West lab equipment. The findings of this project can aid in optimizing and improving the design of the prototype motor, resulting in a more dependable and efficient final product.