Analysis of airgap flux, current, and vibration signals as afunction of the combination of static and dynamic airgap eccentricity in3-phase induction motors |
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Authors: | Dorrell DG Thomson WT Roach S |
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Affiliation: | Dept. of Eng., Reading Univ.; |
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Abstract: | This paper provides new information for the online diagnosis of airgap eccentricity in 3-phase induction motors. A new theoretical analysis of the interaction between harmonic field components due to static and dynamic rotor eccentricity which previous research has not considered is put forward, The resultant nonsupply-frequency current components produced in the supply current which are highlighted by the analysis are found to exist experimentally and indeed shown to be a function of the combined effect of both dynamic and static eccentricity. Further vibration analysis is put forward to identify which particular form of rotor eccentricity is dominant; hence illustrating how faults can be identified in a motor using condition monitoring techniques |
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