2-D magnetomechanical transient simulation of a motor with a bar breakage

The analysis of the vibration response of electrical machines has importance in noise prediction and more recently, fault diagnosis. This work presents a strongly coupled 2-D magnetomechanical simulation of an induction machine under heavy operational conditions: a direct-on-line startup. Both healthy and broken bar states are simulated in a time span long enough to allow the detailed study of the varying frequency components. The results yield, in addition to the usual electrical and magnetic quantities, electromagnetic induced vibration components in the stator. A comparison with current and vibration experimental data is also performed.