On the risk of failure to prevent induction motors permanent damage, due to the short available time‐to‐diagnosis of inter‐turn short‐circuit faults

Autor: Fernando Bento, Amel Adouni, Ananias C. P. Muxiri, Davide S. B. Fonseca, Antonio J. Marques Cardoso
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: IET Electric Power Applications, Vol 15, Iss 1, Pp 51-62 (2021)
Druh dokumentu: article
ISSN: 1751-8679
1751-8660
DOI: 10.1049/elp2.12008
Popis: Abstract As one of the most important assets of the industry, it is crucial to fully characterise all failure modes showing potential to degrade the normal operation of induction motors (IMs). One of the failure modes which lacks detailed knowledge and proper diagnostic tools is the inter‐turn short‐circuit (SC) fault. Given the severity of such failure mode, it is pivotal to ensure that incipient fault symptoms are correctly identified, thus preventing critical damages to the IM. Unfortunately, the state‐of‐the‐art does not provide enough data to confirm whether the available diagnostic tools act out in due time to avoid permanent damage to the faulty IM. To evaluate the impacts of this failure mode in the temperature of the stator windings of an IM, this paper presents the results obtained from two alternative thermal models of the same IM, resorting to the lumped parameter thermal network method and to the finite elements method. The results confirm that diagnostic tools reported in the literature might not be effective, failing to correctly diagnose an inter‐turn SC fault and to warrant the lead time required to take actions suitable to prevent permanent damage to the IM.
Databáze: Directory of Open Access Journals
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