Three phase induction machines asymmetrical faults identification using bispectrum

Bispectrum analysis is introduced for three-phase induction machine faults identification and condition monitoring. Bispectrum analysis is capable of providing more information than power spectrum analysis. In the present investigation, machine vibration signals operating at different rotating speed and degree of unbalance are thoroughly analyzed. Very promising results were obtained and presented. The results and analysis indicate that bispectrum analysis can be successfully applied to machine asymmetric faults, machine rotation speed and stator winding fault analysis and identification.