An Overview on Induction Machine's Diagnosis Methods

Several methods for diagnosing the faults of the squirrel-cage induction motors are cited in the literature. The authors focused their researches on the rotor faults of the squirrel cage induction machines. The aim of the paper is to compare these fault diagnosismethods by means of data processing in LabVIEW the results obtained by measurements. It will be emphasized that beside the current signature analysis also the threephase current vector, the instantaneous torque, respectively the outer magnetic filed can be used for diagnosing the rotor faults.