In this paper, a modal finite element analysis and a modal test were presented subjected an electric motor.
Dynamic behaviour of electromechanical system analysis is very important and useful for increasing the working time in conditions of heavy dynamic loads.
The diagnoses of these systems involve the knowledge of both natural and the loads frequencies. The increasing of life working means to avoid those dynamic loads that have the same frequency (or are near) with the natural frequencies of the assembly or of the parts.
To find the natural frequencies there two possibility: one based on simulation using approximate methods as finite element method and the second one to find by experiments these natural frequencies.