The Zero-Sequence Current as a Generalized Diagnostic Mean in Δ-Connected Three-Phase Induction Motors

K.N. Gyftakis, J.C. Kappatou

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

In this paper, a new diagnostic mean is introduced for accurate, reliable, and effective diagnosis of faults in delta-connected induction motors. This mean is the zero-sequence stator current spectrum. The study is carried out with analytical calculations and finite-element method simulations. Most common faults are examined for a 4-kW cage induction motor. The analysis will reveal that the proposed mean is able to successfully identify the static eccentricity fault, even in induction motors which produce principal slot harmonics, the broken bar fault, the unbalanced voltage supply, and the stator interturn short-circuit. It will also be shown that through the proposed method, it is possible to distinguish the interturn short-circuit from the unbalanced voltage supply.
Original languageEnglish
Pages (from-to)138-148
JournalIEEE Transactions on Energy Conversion
Volume29
Issue number1
DOIs
Publication statusPublished - 2013

Bibliographical note

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Keywords

  • Fault diagnosis
  • finite-element method (FEM)
  • induction motor
  • zero-sequence current

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