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Broken Rotor Bars Detection in Squirrel-Cage Induction Machines by Motor Current Signature Analysis Method

Condition monitoring is an important issue in the maintenance of electrical machines. In the last years several methods for fault diagnosis of the squirrel-cage induction motors were cited in the literature. Among these methods the Motor Current Signature Analysis (MCSA) is considered the most effective non-invasive fault detection method, because it can easily detect all the common electrical machine's faults. The method in discussion uses the harmonic content of the line current of the induction machine to detect diverse faults of the analyzed electrical machine. In the paper experimental results on detecting broken rotor bars in squirrel cage induction motors by using MCSA are given.