Skip to Main content Skip to Navigation
Theses

Condition Monitoring of Mechanical Faults in Variable Speed Induction Motor Drives -
Application of Stator Current Time-Frequency
Analysis and Parameter Estimation

Abstract : This Ph.D. thesis deals with condition monitoring of mechanical failures in variable
speed induction motor drives by stator current analysis. Two effects of a mechanical
fault are considered: load torque oscillations and airgap eccentricity. The analytical
modelling using the magnetomotive force and permeance wave approach leads
to two stator current models. The fault provokes amplitude or phase modulation
of the fundamental current component. Suitable detection methods are spectral
analysis and parameter estimation in steady state whereas time-frequency analysis
is required during transients. Instantaneous frequency estimation, the Wigner Distribution
and the spectrogram are studied. Simulation and experimental results
validate the theoretical approach. Automatic extraction of fault indicators is proposed
for an unsupervised monitoring system. Moreover, load torque oscillations
and dynamic eccentricity can be discriminated with the proposed methods. The
feasibility of an on-line monitoring system is demonstrated by a DSP implementation
of the time-frequency analysis including indicator extraction.
Document type :
Theses
Complete list of metadatas

Cited literature [103 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00105482
Contributor : Martin Blödt <>
Submitted on : Wednesday, October 11, 2006 - 11:52:45 AM
Last modification on : Friday, June 14, 2019 - 6:30:59 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 7:19:47 PM

Identifiers

  • HAL Id : tel-00105482, version 1

Collections

Citation

Martin Blödt. Condition Monitoring of Mechanical Faults in Variable Speed Induction Motor Drives -
Application of Stator Current Time-Frequency
Analysis and Parameter Estimation. Electric power. Institut National Polytechnique de Toulouse - INPT, 2006. English. ⟨tel-00105482⟩

Share

Metrics

Record views

365

Files downloads

1712