-

Stator fault detection may be done with different methods. However, If the stator current sensor is to be installed for protection and controlling of an induction motor, signature and FFT analyses are the mostly used for on-line stator fault detection. Also, winding function method is an effective procedure for modeling motors in unbalance conditions. Simulation results with this method are used in this paper for detection of the turn-to-turn, coil-to-coil and
phase-to-phase faults. The FFT analysis of
line current, interrupting motor power supply, negative sequence currents and R.M.S value of speed are all important criteria for fault diagnosis. Simulation and
Experimental results confirm that the FFT analyses and interruption of motor from supply and RM.S value of the speed are the effective methods for the fault detection. Experimental results are presented to verify the accuracy of the simulation results