Induction motor bearing fault analysis using Root-MUSIC method

This paper describes a new diagnosis approach, the Root-MUSIC (RM) method, for identification of the progressive cracking in the bearing of induction motors. This approach has several advantages compared to the stator current spectral analysis using the conventional Periodogram method. Indeed, the main advantage of this approach is its very good frequency resolution for a very short acquisition time, something impossible to achieve with the conventional method. However, in order to reduce the computation time which is the main drawback of the RM method, this method will be applied to only a specified frequency band; one that carries information about the sought fault. Experimental results show the effectiveness of RM method on the reliability of the incipient bearing fault detection.