Rotor Fault Detection in Line-fed Induction Machines Using Complex Wavelet Analysis of Startup Transients

Three–phase inductions machines are the primary consumers of electric power in industrialized countries, they can typically consume between 40 to 50% of all the generated power (Thomsom et al., 2001). Diagnostic testing of induction machines is therefore of tremendous importance in many applications, and has been the focus of intense research for many years (Aller et al., 2002), (Antonino-Daviu et al., 2006), (Briz et al., 2008), (Benbouzid, 2000), (Douglas et al. 2003), (Douglas et al. 2004), (Douglas et al. 2005), (Douglas et al. 2005-b), (Faliang Niu & Jin Huang, 2005), (Nandi & Toliyat, 2005), (Thomson & Fenger, 2001), (Supangat et al., 2006). Based on the results from failure surveys, the failure mechanism for induction machines can be divided into the following four general categories, with the percentage of total failure shown (Thomsom et al., 2001).  Stator related: 40%  Rotor related: 10%  Bearing related: 40%  Other: 10%