Evaluation of Rotor Faults of Induction Motors by Statistical Analysis Method

In this article, commonly occurring rotor faults of squirrel-cage induction motors will be statistically analyzed and evaluated. rotor faults generally occur due to broken rotor bars and cracking of end-rings. rotor faults are reflected into the stator current as harmonics. various signal processing methods are used to detect these harmonics. these harmonics and other feature extraction methods are used to detect the faults of induction motor. in this work, the stator current is firstly studied by using envelope analysis. the data gained as result of envelope analysis are studied statistically. in the statistical analysis mean, median, standard deviation, variance, kurtosis, skewness, probability density function and cumulative density function were calculated. the gained results indicate that the statistical analysis methods can be used for the detection of rotor faults of squirrel-cage induction motors.