Improvement of the detection of the defect squirrel cage rotor by the study of additional components of the space harmonics

In this paper, in order to improve the fault detection of the broken rotor bars, models of healthy machine, one and two broken rotor bar machines taking a count the first space harmonics were simulated. Motor current signature analysis method is the technique for extracting information of the stator current in the band frequency of 0–700 Hz. The results show that the study of the sidebands presented around the supply frequency, the principal components and the additional components of the space harmonics enables us to carry out a more precise state of the rotor defect. This method gives more information on the state of the machine to carry out a more precise diagnosis study. The experimental results prove the efficiency of the proposed method.