Seyed Abolfazl Mortazavizadeh - Special Machines & Drive Laboratory, Department of Electrical Engineering, Iran University of Science & Technology
Abolfazl Vahedi
Alireza Zohouri

Vibration analysis is one of the most common tools in condition monitoring and detecting faults in electrical machines. There are several standards to monitor the machines conditionand discern unusual situation in electrical machines by this technique. Current standards that are being used for fault diagnosis in electrical machines by vibration analysis mostly dealwith increases in overall vibration amplitude in faulty conditions. As Inter-turn in motor or generator stator fault doesn’t affect overall vibration and just increase several frequencies that will be introduced in this paper, these standards cannot detect stator inter-turn. The author suggests that Pursuing of special frequencies is best way to detect inter-turn in machines byvibration technique instead of using current standards for detecting the mentioned fault. Finally will be shown vibration spectrum in an asynchronous motor in both healthy and stator winding inter-turned situation and compared the amplitude of introduced frequencies in that experimental object.

Condition monitoring, Vibration, Standard, Inter-turn, Fault diagnosis