Naslov
Stator Current Spectrum Signature of a Healthy Cage Rotor Induction Machines

Autori
Joksimović, Gojko ; Riger, Jakša ; Wolbank, Thomas ; Perić, Nedjeljko ; Vašak, Mario

Izvornik
IEEE transactions on industrial electronics (0278-0046) 60 (2013), 9; 4025-4033

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
induction machines; condition monitoring; fault detection; fault diagnosis; Fourier transform; induction motor drives; preventive maintenance; spectrum analysis

Sažetak
Before applying current signature analysis based monitoring methods it is necessary to thoroughly analyze the existence of the various harmonics on healthy machines. As such an analysis is only done in very few papers, the objective of this work is to make a clear and rigorous characterization and classification of the harmonics present in a healthy cage rotor induction motor spectrum as a starting point for diagnosis. Magnetomotive force space harmonics, slot permeance harmonics as well as saturation of main magnetic flux path through the virtual air gap permeance variation are taken into analytical consideration. General rules are introduced giving a connection between the number of stator slots, rotor bars, pole pairs and the existence of rotor slot harmonics as well as saturation related harmonics in the current spectrum. For certain combinations of stator and rotor slots, saturation related harmonics are shown to be most prominent in motors with pole pair number two or more. A comparison of predicted and measured current harmonics is given for several motors with different number of pole pairs, stator slots and rotor bars.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Temeljne tehničke znanosti

POVEZANOST RADA