Vibration control in electrical machines using built-in actuator

Karuna Kalita, Sivaramakrishnan Natesan, Gaurav Kumar, Kari Tammi

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)

    Abstract

    The magnetic field within electrical machines causes an electromechanical interaction between the electrical and mechanical dynamics of the system. A relatively small asymmetry of flux distribution in the air gap creates an unbalanced magnetic force which tends to pull the rotor towards the stator in the direction of the highest flux density. This unbalanced magnetic force (or pull) in an electrical machine is exploited in so-called self-bearing or bearing-less electrical machine where, as well as functioning as a motor or generator, the machine can also produce transverse forces perpendicular to the rotation axis. The presence of magnetic field of pole pair p is due to the main supply of the motor and the presence of magnetic field of pole pair p±1 is due to the asymmetry present in the magnetic field or due to the eccentric rotor motion. So, the presence of magnetic field of pole pair p±1 will produce an unbalanced magnetic force in the air gap. This paper addresses a special type of stator winding scheme having parallel branches and a novel Wheatstone-bridge type connection in order to achieve direct control on the unbalanced components of stator magnetomotive force (MMF) whilst having no effect on the torque-producing components of the stator MMF. An Finite Element code has been developed in MATLAB and used as the basic tool for this investigation. It has been demonstrated in case of an induction motor that a controllable force in the air gap can be produced. The results from numerical model have been verified by experimental results.
    Original languageEnglish
    Title of host publicationProceedings of the 9th IFToMM International Conference on Rotor Dynamics
    Subtitle of host publicationMechanisms and Machine Science
    PublisherSpringer
    Pages1593-1603
    ISBN (Electronic)978-3-319-06590-8
    ISBN (Print)978-3-319-06589-2
    DOIs
    Publication statusPublished - 26 May 2015
    MoE publication typeA4 Article in a conference publication
    Event9th IFToMM International Conference on Rotor Dynamics - Milano, Italy
    Duration: 22 Sep 201425 Sep 2014
    Conference number: 9

    Publication series

    SeriesMechanisms and Machine Science
    Volume21
    ISSN2211-0984

    Conference

    Conference9th IFToMM International Conference on Rotor Dynamics
    CountryItaly
    CityMilano
    Period22/09/1425/09/14

    Keywords

    • Active
    • Vibration
    • Control
    • Levitation

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  • Cite this

    Kalita, K., Natesan, S., Kumar, G., & Tammi, K. (2015). Vibration control in electrical machines using built-in actuator. In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics: Mechanisms and Machine Science (pp. 1593-1603). Springer. Mechanisms and Machine Science, Vol.. 21 https://doi.org/10.1007/978-3-319-06590-8_131