Acoustic analysis of electric motors in noisy industrial environment

Maciej Orman, Cajetan T. Pinto

Abstract

This paper presents a method of acoustic analysis of electric motors in noisy industrial environment. Acoustic signals were measured by the microphones arrays called acoustic camera. Measurements by acoustic camera allow localization of sound source and by that separate sounds of interests from background noise. Results of acoustic analysis are compared with vibration measurements. Vibration monitoring is a well-known technique used in condition monitoring and in this work vibration measurements were used as a reference signal for assessment of the value of acoustic measurements. Vibration signals were measured by piezoelectric accelerometers. Two induction motor cases were examined — healthy motor case and combination of static eccentricity with soft foot case. As presented in result section acoustic analyses appear as valuable techniques for condition monitoring of electric motors even in noisy industrial environment.

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IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

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