Calculation of unbalanced magnetic force in slotless PM machines

A Borisavljevic, H Polinder, JA Ferreira

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


    Asymmetric rotor displacement in permanent magnet machines brings about unbalanced magnetic force between the rotor and stator. Prediction of the unbalanced force is important in design of spindle drives because it helps assessing eventual spindle runout. Additionally, maximum anticipated unbalanced force sets stiffness requirements for bearings of soft-mounted high-speed machines. Good modelling of the distorted flux density in the machine with an eccentric rotor is essential for accurate force estimation. In the paper a simple method for estimating unbalanced force in slotless PM machines is presented and effectiveness of the model is compared with models based on conformal mapping.
    Original languageEnglish
    Title of host publicationProceedings of the Electrimacs 2011
    EditorsE Monmasson
    Place of PublicationCergy-Pontoise, France
    PublisherUniversity of Cergy-Pontoise - Paris
    Number of pages6
    Publication statusPublished - 2011
    EventELECTRIMACS 2011, Cergy-Pontoise, France - Cergy-Pontoise, France
    Duration: 6 Jun 20118 Jun 2011

    Publication series

    PublisherUniversity of Cergy-Pontoise - Paris


    ConferenceELECTRIMACS 2011, Cergy-Pontoise, France


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


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