Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM

Mark Thiele, Greg Heins

    Research output: Chapter in Book/Report/Conference proceedingConference Paper published in Proceedingspeer-review


    Cogging torque in fractional pitch PMSM is minimized when manufacturing induced errors are also minimized. This paper investigates additional cogging torque harmonics resulting from misalignment of the rotor and stator caused by assembly and manufacturing tolerances in an axial flux, fractional pitch PMSM. A simulation method utilizing superposition of a single magnet / single slot interaction has been used previously to decouple manufacturing errors such as magnet placement and stator non-uniformity. This work extends on that previously published by inducing varying degrees of assembly misalignment of the stator and rotor to determine the effect on cogging torque waveforms. Experimental data is presented indicating that increasing degrees of offset misalignment leads to increasing sideband magnitudes in the frequency spectrum. There is good agreement between the simulation method and measured data.
    Original languageEnglish
    Title of host publicationProceedings 2012 XXth International Conference on Electrical Machines
    EditorsGA Capolini, C Henaux, A Boglietti, B Nogared
    Place of PublicationRed Hook, New York USA
    PublisherIEEE, Institute of Electrical and Electronics Engineers
    Number of pages6
    EditionISBN 2 - 978-1-4673-0143-5
    ISBN (Print)978-1-4673-0142-8
    Publication statusPublished - 2012
    EventInternational Conference on Electrical Machines (ICEM 2012 20th) - Palais des Congrès et des Expositions de Marseille, France, Marseille, France
    Duration: 2 Sept 20125 Sept 2012
    Conference number: 2012 (20th)


    ConferenceInternational Conference on Electrical Machines (ICEM 2012 20th)
    Abbreviated titleICEM


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