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

Volume

19

Issue

1

fYear

2014

fDate

Feb. 2014

Firstpage

184

Lastpage

190

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;

fLanguage

English

Journal_Title

Mechatronics, IEEE/ASME Transactions on

Publisher

ieee

ISSN

1083-4435

Type

jour

DOI

10.1109/TMECH.2012.2226739

Filename

6361482