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Fault diagnosis of electric motors is still a challenging task for researchers. Various rotor cage faults detection techniques for electric motors have been proposed during the last two decades. One of these techniques widely used is the one based on the stator current spectral analysis which is still an open topic of research. This paper focusses on this technique; which has proven to be simple and...
This paper deals with the problem of the early stator (the short-circuits) and rotor (broken bars) faults detection of the induction motors supplied from the frequency converter. The method basing on the FFT algorithm is used for the spectral analysis of the instantaneous active power, the instantaneous reactive power and the estimated electromagnetic torque. These signals are on-line calculated,...
The rapid growth of the signal processing theory resulted in the rise of new methods in diagnostics of the drives. This paper focuses on the application of the complete systems of orthogonal functions, for which fast computational procedures are applicable. It is shown that a spectral analysis employing bases of the Haar functions is highly suitable for both analysis and synthesis of the diagnostic...
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