Title :
Runout Tracking in Electric Motors Using Self-Mixing Interferometry
Author :
Atashkhooei, Reza ; Urresty, Julio-Cesar ; Royo, Santiago ; Riba, Jordi-Roger ; Romeral, Luis
Author_Institution :
Center for Sensors, Instrum., & Syst. Dev. (CD6 Res. Center), Univ. Politec. de Catalunya, Terrassa, Spain
Abstract :
In this paper, a self-mixing interferometry sensor has been used as a proximity probe to measure possible runout in permanent magnet synchronous motors, for fault diagnosis. A general procedure for the measurement of the 2-D trajectory of the motor shaft is described in detail, including procedures for the characterization of the uncertainty due to the shape of the shaft, and the management of speckle noise. The performance of the proposed sensor has been compared to that of a commercial Polytec laser vibrometer, for validation purposes. Results show inaccuracies in the order of ±6 μm, which agree well with the measured uncertainty introduced by shaft surface imperfections.
Keywords :
fault diagnosis; interferometry; permanent magnet motors; shafts; synchronous motors; vibration measurement; 2D trajectory; Polytec laser vibrometer; electric motors; fault diagnosis; motor shaft; permanent magnet synchronous motors; runout tracking; self-mixing interferometry sensor; shaft surface imperfections; speckle noise; Displacement measurement; Laser beams; Measurement by laser beam; Measurement uncertainty; Noise; Shafts; Speckle; Feedback interferometry; motor shaft displacement; optical probe; permanent magnet synchronous motors (PMSMs); runout tracking; self-mixing; shaft proximity probe;
Journal_Title :
Mechatronics, IEEE/ASME Transactions on
DOI :
10.1109/TMECH.2012.2226739
