FIELD: physics.
SUBSTANCE: voltage and consumption current time dependences are recorded in three phases of electric motor. Received signals are advanced through low-pass filter and digitised. Park vector modules spectra of current and pressure are formed. Then spectral analysis of produced spectra is applied. Characteristic frequencies of electric motor and associated devices are isolated. And nature and degree of defect development are detected by comparing amplitudes of Park vector modules spectra of current at characteristic frequencies with Park vector modules spectra of current at null frequency.
EFFECT: higher accuracy of remote fully-automatic diagnostics and diagnostic enhancement.
11 cl, 9 dwg
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