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Diagnosis and detection of short circuit in asynchronous motor using three-phase model

  • Saadi Sakhara
  • Salah SaadEmail author
  • Leila Nacib
Original Article

Abstract

Several reported works have studied detection and short circuit fault diagnosis in electric machines based on different models. Regarding simplifying assumptions and model conditions of use in relation to stator fault (short circuit), the X change model is proposed because all parameters are computed online. Subsequently, the electrical parameters do not depend on relative position between the stator and the rotor. In this paper, two signal processing techniques are employed for short-circuit diagnosis. The first technique is based on spectral analysis (FFT) using stator current spectral components in healthy and short circuit states at steady state (stationary state). Whereas, the second technique is based on discrete wavelet transform (DWT) considered as an ideal tool because of its signals (non stationary state) analysis ability. Tests are conducted by numerical simulation and the obtained results have showed clearly that, the signatures can be extracted to detect and locate faults.

Keywords

Diagnosis Unbalance FFT Wavelet transform Asynchronous machine Three-phase model 

List of symbols

[Rs]

Stator resistance matrix

[Rr]

Rotor resistance matrix

[Msr]

Matrix of stator and rotor mutual inductance

[Mrs]

Matrix of rotor and stator mutual inductance with [M sr ] = [M rs ] T

[Ms]

Matrix of stator proper inductance \(\left[ {M_{s} } \right] \, = \, [L_{s\sigma } \left] { \, + \, } \right[M_{ss} ]\)

[Mr]

Matrix of rotor proper inductance \(\left[ {M_{r} } \right] \, = \, [L_{r\sigma } \left] { \, + \, } \right[M_{rr} ]\)

\([L_{s\sigma } ]\)

Matrix of stator cyclic inductance

[Mss]

Matrix of mutual inductance between three stator winding

\([L_{r\sigma } ]\)

Matrix of rotor cyclic inductance

[Mrr]

Matrix of mutual inductance between three rotor winding

Machine parameters

P

Output power (1.1 Kw)

P

Number of pole pairs (2)

Rr

Rotor resistance (3.58 Ω)

Rs

Stator resistance (10.4 Ω)

M

Mutual inductance (0.44 H)

L

Stator leakage inductance of (0.0566 H)

L

Rotor leakage inductance of (0.017 H)

Notes

Acknowledgments

The authors like to thank the Algerian general direction of research (DGRSDT) for their financial support.

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Copyright information

© The Society for Reliability Engineering, Quality and Operations Management (SREQOM), India and The Division of Operation and Maintenance, Lulea University of Technology, Sweden 2016

Authors and Affiliations

  1. 1.LSELM: Laboratoire Systèmes ElectromécaniquesUniversité de Badji MokhtarAnnabaAlgeria
  2. 2.LAGIS: Laboratoire de Génie Informatique et SignalUniversité Lille 1LilleFrance
  3. 3.Université El Bachir El IbrahimiBordj Bou ArreridjAlgeria

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