METHOD AND SYSTEM FOR MONITORING MECHANICAL BEARING

METHOD AND SYSTEM FOR MONITORING MECHANICAL BEARING

The present disclosure describes a method and a system for monitoring condition of a mechanical bearing that is coupled to an electric machine that is controlled by a frequency converter. The method comprises calculating a frequency-domain representation of the angle of the magnetic flux in frequenc...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Särkimäki, Ville, Alkkiomäki, Olli
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:The present disclosure describes a method and a system for monitoring condition of a mechanical bearing that is coupled to an electric machine that is controlled by a frequency converter. The method comprises calculating a frequency-domain representation of the angle of the magnetic flux in frequency domain on the basis of an estimated an angle of the magnetic flux, determining a magnitude of at least one fault signature in the calculated frequency-domain representation, wherein a fault signature is formed by a predetermined selection of one or more frequency components of the angle of the magnetic flux in the calculated frequency-domain representation, and determining the condition of the bearing on the basis of the magnitude of the at least one fault signature.