Indication of failures of rotor bar on induction machine with squirrel cage rotor in its external electromagnetic field

Author

Bernat, Petr ; Hytka, Zdenek ; Kacor, Petr

Author_Institution

Dept. of Electr. Power Eng., VSB - Tech. Univ., Ostrava, Czech Republic

fYear

2015

fDate

20-22 May 2015

Firstpage

691

Lastpage

696

Abstract

The paper deals with impact of electric asymmetry of rotor coil on induction machine on the time course of electromagnetic flow inside the machine as well as any change to the course of electromagnetic leakage flux on the surface of machine frame and in its immediate vicinity. Familiarity with dependency between the course of flux and specific failures of the machine helps with measuring of the leakage flux by simple means, with records to be utilised as a value easy to obtain and measure to proceed with non-contact diagnostics of a specific machine failure. The paper further refers to results of mathematical modelling to show the indication of a specific failure, including its comparison with measurement.

Keywords

coils; electromagnetic fields; failure analysis; fault diagnosis; magnetic flux; magnetic leakage; rotors; squirrel cage motors; electromagnetic flow; electromagnetic leakage flux measurement; external electromagnetic field; induction machine; machine failure noncontact diagnosis; machine frame surface; rotor coil electric asymmetry; squirrel cage rotor bar failure indication; Current measurement; Distortion; Frequency measurement; Frequency modulation; Rotors; Stators; asynchronous machine; frequency spectrum; functional testing; induction machine; leakage flux; rotor bars; squirrel cage rotor; stray electromagnetic field; technical diagnostics;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Power Engineering (EPE), 2015 16th International Scientific Conference on

Conference_Location

Kouty nad Desnou

Type

conf

DOI

10.1109/EPE.2015.7161135

Filename

7161135