Fault detection of squirrel cage induction motor by analyzing motor current signals

This paper deals with the operating characteristics of a squirrel cage induction motor with a broken rotor bar, stator winding inter-turn short and their complex fault conditions. The considered operating characteristics are phase current, torque and speed. In addition, differently from conventional fault detecting method using Park´s transformation, this paper applies the MCSA(motor current signal method) to distinguish the fault types more accurately. In addition, this paper constructed the experimental set to adjust the speed of the induction motor with a permanent magnet synchronous generator connected to a load bank to confirm the fault characteristics of the induction motor according to its slip conditions.