On-line fault diagnostics in operating three-phase induction motors by the active and reactive currents

Motor current stator analysis (MCSA) are usually used to detect the broken bars. In several industrial applications, like cement industry, the motor is subjected to load torque variations of low frequencies, which have effects similar to rotor faults in the current spectrum and result of diagnostic...

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Bibliographic Details
Published inInternational journal of system assurance engineering and management Vol. 8; no. Suppl 1; pp. 160 - 168
Main Authors Mabrouk, A. E., Zouzou, S. E., Khelif, S., Ghoggal, A.
Format Journal Article
LanguageEnglish
Published New Delhi Springer India 2017
Springer Nature B.V
Subjects
Bars
Computer simulation
Diagnostic systems
Engineering
Engineering Economics
Induction motors
Industrial applications
Logistics
Marketing
Organization
Original Article
Quality Control
Reliability
Safety and Risk
Sidebands
Squirrel cage motors
Induction motor
Fault diagnosis
Load oscillations
Broken rotor bar
Instantaneous active and reactive currents
Modified winding-function approach (MWFA)
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Summary:Motor current stator analysis (MCSA) are usually used to detect the broken bars. In several industrial applications, like cement industry, the motor is subjected to load torque variations of low frequencies, which have effects similar to rotor faults in the current spectrum and result of diagnostic procedure may be ambigues. In this paper, we present a study based on the application of the instantaneous active and reactive courant signature analyses for discriminating broken rotor bars from mechanical load oscillation effects in operating three-phase squirrel cage induction motors. This method is attractive because it does not need to interrupt the operating system in its application and allows the user to “see” the diagnosis information in the same way as in the well-known MCSA, i.e., as sidebands next to the fundamental current component. This technique has been first tested through the simulation of induction motors using a mathematical model based on the modified winding-function approach (MWFA). Then, experimental results are presented in order to demonstrate the capability of the proposed tool for discriminating between a motor with broken rotor bars from a motor driven by an oscillating load.
ISSN:0975-6809
0976-4348
DOI:10.1007/s13198-015-0364-4