Title :
Current-based sensorless vibration monitoring of small synchronous machines
Author :
Riley, Caryn M. ; Habetler, Thomas G.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
This paper presents an initial study into the relationship between mechanical vibrations and their effect on the airgap and the resultant stator and field current harmonics in low and medium voltage synchronous machines. Experimental results show that the modulation of the airgap by mechanical vibrations can be detected in the stator and field current spectra and are monotonically related for a given vibration/current harmonic set. This paper presents experimental results for a 4 kW, 240 V, 4 pole wound-field synchronous motor tested at two different load conditions for five levels of rotor imbalance
Keywords :
air gaps; harmonics; spectral analysis; stators; synchronous motors; vibration measurement; 240 V; 4 kW; 4 pole wound-field synchronous motor; airgap modulation; current-based sensorless vibration monitoring; field current harmonics; field current spectra; low voltage synchronous machines; mechanical vibrations; medium voltage synchronous machines; rotor imbalance; small synchronous machines; stator phase current; vibration-induced eccentricity; vibration/current harmonic set; Condition monitoring; Equations; Machine windings; Probes; Rotors; Stator cores; Stator windings; Synchronous machines; Synchronous motors; Vibrations;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.701886
