Analysis and modelling of broken rotor bars in squirrel cage induction machine

The history of faults occurring at electric motors is nearly the same age as the history of electric motors. At the beginning, manufacturers and users were to adopt themselves basic solutions against faults occurred at electric motors. Faults occurred at electric motors solved by taking measures such as grounding, using over current protectors or using voltage regulators. However, it is getting hard to diagnosing the fault and solving the problems as fault types rise with developments in electric machines. Faults also results in tangible damages. Because of all these reasons, fast fault diagnosis and intervene in the fault became important [1].Faults occurring at rotor part of the induction machine because of the broken rotor bars reflect to stator current as harmonics. In this paper the observation of broken rotor bars at induction machines from stator current is modeled at MATLAB/Simulink medium. And than experimental results and simulation results are comoared. The results demonstrate that Simulink model can also be used for educational purposes.