Analytical modelling of electromagnetic origin vibrations in an induction machine supplied by high power PWM inverter

This paper describes a study concerning the analytical modelling of electromagnetic origin vibrations in an induction machine supplied by high power PWM inverter. First, we introduce the vibration sources in electrical machines. Then we present the analytical method to model the vibrations, by considering the induction machine electromagnetic equations and the stator mechanical response. By using this model, we show the influence of the main induction machine geometrical parameters on vibrations. We present a two-dimensional analysis of the electromagnetic origin vibrations. Finally the results given by the analytical model are compared with the ones obtained with a FEM model and with vibration measurements in order to prove the validity of the analytical model