Detection of eccentricity and bearings fault using stray flux monitoring

O Vitek, M Janda, V Hajek, P Bauer

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    49 Citations (Scopus)


    The article describes the possibilities of employment of external magnetic field for detection of rotor eccentricity and for bearing fault diagnosis. Proposed method uses the magnetic flux density in proximity of induction motor as a diagnostic signal and it reaches the relatively high sensitivity in case of rotating air gap asymmetry represented by dynamic eccentricity. Since the bearing fault is the most frequent type of failure, the feasibility of applying this method is investigated. The results of experimental tests are introduced, including the motors with dynamic eccentricity and with artificially damaged bearing on the inner race. Both the stray flux and stator current are measured and compared in frequency domain.
    Original languageEnglish
    Title of host publicationProceedings of the 8th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics & Drives
    EditorsF Filippetti, D Casadei, A Bellini, C Tassoni
    Place of PublicationPiscataway, NJ, USA
    PublisherIEEE Society
    Number of pages6
    ISBN (Print)978-1-4244-9301-2
    Publication statusPublished - 2011
    Event8th IEEE International SDEMPED 2011 - Piscataway, NJ, USA
    Duration: 5 Sep 20118 Sep 2011

    Publication series



    Conference8th IEEE International SDEMPED 2011


    • conference contrib. refereed
    • Conf.proc. > 3 pag

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