American Journal of Applied Sciences

INVESTIGATION ON THE DIAGNOSIS OF SIMPLE AND COMBINES MECHANICAL FAULTS IN ASYNCHRONOUS MOTOR BASED ELECTRIC DRIVES

Bouras A. Karim, Bouras Slimane, Hadjadj A. Elias, Benamira Nadir and Kerfali Samir

DOI : 10.3844/ajassp.2014.994.1004

American Journal of Applied Sciences

Volume 11, Issue 6

Pages 994-1004

Abstract

In this study, the problems of mechanical unbalance, parallel and angular misalignments and their combinations are analyzed experimentally. Such frequent defects in the drives mainly in the major powers are also responsible for the bearings degradation. However, they have not raised the attention of researchers, given the complexity of their modeling. The combination of the phasic current signal analysis and the neutral current by the FFT supplemented by visual interpretation of patterns models these defects resulting from the 3D representation. The results obtained by using the proposed method show the efficiency to provide an accurate diagnosis of the state of the electric drive undergoing to isolated and combined mechanical defaults to a maintenance staff not necessarily expert of mechanical failure. The innovative approach validated experimentally on a 5.37 KW motor, offers an efficiency to provide an accurate diagnosis to a maintenance staff not necessarily composed of experts in this field.

Copyright

© 2014 Bouras A. Karim, Bouras Slimane, Hadjadj A. Elias, Benamira Nadir and Kerfali Samir. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.