Accession Number:

AD1002404

Title:

A Vibration-Based Approach for Stator Winding Fault Diagnosis of Induction Motors: Application of Envelope Analysis

Descriptive Note:

Conference Paper

Corporate Author:

Center for Intelligent Maintenance Systems Cincinnati United States

Report Date:

2014-10-02

Pagination or Media Count:

9.0

Abstract:

Induction motors are usually considered as one of the key components in various applications. To maintain the availability of induction motors, it calls for a reliable condition monitoring and prognostics strategy. Among the common induction motor faults, stator winding faults are usually diagnosed with current and voltage signals. However, if the same performance can be achieved, the use of vibration signal is favorable because the winding fault diagnostic method can be integrated with bearing fault diagnostic method which has been successfully proven with vibration signal. Existing work concerning vibration for winding faults often takes it either as auxiliary to magnetic flux, or is not able to detect the winding faults unless severity is already quite significant. This paper proposes a winding fault diagnostic method based on vibration signals measured on the mechanical structure of an induction motor. In order to identify the signature of faults, time synchronous averaging was firstly applied on the raw vibration signals to remove discrete frequency components originating from the dynamics of the shaft andor gears, and the spectral kurtosis filtering was subsequently applied on the residual signal to emphasize the impulsiveness.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE