Simulation of steady-state and dynamic performance of induction motor for diagnostic purpose

The paper presents a computer simulation of the steady-state and dynamic performance of induction motor for diagnostic purposes. The case of broken rotor bars as the source of rotor electrical asymmetry was studied. Based on a mathematical model, the computer simulation of the influence of rotor cage defect on the air-gap magnetic field distribution, torque and current characteristics of an induction motor with higher space harmonics taken into account, is performed. Such simulation represents the contribution to the correct evaluation of the measured data and is a powerful tool for condition monitoring and online diagnosis of electric machines.