Abstract: The basic methods of diagnosis broken rotor bars is presented in this paper. The time stepping in finite elements techniques is used and investigated in details. Widely comparison of introduced methods with another techniques shows that the suggested technique provides fast and accurate path to diagnosis the faults earlier which consider efficient way to reduce the faults in induction motors by mean of time different of torque in healthy and faulty motors and stator current waveforms. Additionally, the flux distribution is considered as the third techniques in this study. A result shows the fast extraction of faults in the induction motors and new developing techniques is founded.
Keywords: squirrel cage, induction motor, healthy and faulty motor, FEM.