Distributed model for electromechanical interaction in rotordynamics of cage rotor electrical machines

Antti Laiho, Timo P. Holopainen, Paul Klinge, Antero Arkkio

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)

    Abstract

    In this work the effects of the electromechanical interaction on rotordynamics and vibration characteristics of cage rotor electrical machines were considered. An eccentric rotor motion distorts the electromagnetic field in the air-gap between the stator and rotor inducing a total force, the unbalanced magnetic pull, exerted on the rotor. In this paper a low-order parametric model for the unbalanced magnetic pull is coupled with a three-dimensional finite element structural model of the electrical machine.
    The main contribution of the work is to present a computationally efficient electromechanical model for vibration analysis of cage rotor machines. In this model, the interaction between the mechanical and electromagnetic systems is distributed over the air gap of the machine.
    This enables the inclusion of rotor and stator deflections into the analysis and, thus, yields more realistic prediction for the effects of electromechanical interaction. The model was tested by implementing it for two electrical machines with nominal speeds close to one of the rotor bending critical speeds. Rated machine data was used in order to predict the effects of the electromechanical interaction on vibration characteristics of the example machines.
    Original languageEnglish
    Pages (from-to)683-698
    JournalJournal of Sound and Vibration
    Volume302
    Issue number4-5
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    rotor dynamics
    rotors
    Rotors
    interactions
    stators
    vibration
    Stators
    critical velocity
    air
    eccentrics
    Vibration analysis
    Air
    Electromagnetic fields
    deflection
    electromagnetic fields
    inclusions
    electromagnetism
    predictions

    Keywords

    • eccentric rotor
    • rotordynamics
    • rotors
    • unbalanced magnetic pull

    Cite this

    Laiho, Antti ; Holopainen, Timo P. ; Klinge, Paul ; Arkkio, Antero. / Distributed model for electromechanical interaction in rotordynamics of cage rotor electrical machines. In: Journal of Sound and Vibration. 2007 ; Vol. 302, No. 4-5. pp. 683-698.
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    title = "Distributed model for electromechanical interaction in rotordynamics of cage rotor electrical machines",
    abstract = "In this work the effects of the electromechanical interaction on rotordynamics and vibration characteristics of cage rotor electrical machines were considered. An eccentric rotor motion distorts the electromagnetic field in the air-gap between the stator and rotor inducing a total force, the unbalanced magnetic pull, exerted on the rotor. In this paper a low-order parametric model for the unbalanced magnetic pull is coupled with a three-dimensional finite element structural model of the electrical machine. The main contribution of the work is to present a computationally efficient electromechanical model for vibration analysis of cage rotor machines. In this model, the interaction between the mechanical and electromagnetic systems is distributed over the air gap of the machine. This enables the inclusion of rotor and stator deflections into the analysis and, thus, yields more realistic prediction for the effects of electromechanical interaction. The model was tested by implementing it for two electrical machines with nominal speeds close to one of the rotor bending critical speeds. Rated machine data was used in order to predict the effects of the electromechanical interaction on vibration characteristics of the example machines.",
    keywords = "eccentric rotor, rotordynamics, rotors, unbalanced magnetic pull",
    author = "Antti Laiho and Holopainen, {Timo P.} and Paul Klinge and Antero Arkkio",
    year = "2007",
    doi = "10.1016/j.jsv.2006.11.032",
    language = "English",
    volume = "302",
    pages = "683--698",
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    Distributed model for electromechanical interaction in rotordynamics of cage rotor electrical machines. / Laiho, Antti; Holopainen, Timo P.; Klinge, Paul; Arkkio, Antero.

    In: Journal of Sound and Vibration, Vol. 302, No. 4-5, 2007, p. 683-698.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Distributed model for electromechanical interaction in rotordynamics of cage rotor electrical machines

    AU - Laiho, Antti

    AU - Holopainen, Timo P.

    AU - Klinge, Paul

    AU - Arkkio, Antero

    PY - 2007

    Y1 - 2007

    N2 - In this work the effects of the electromechanical interaction on rotordynamics and vibration characteristics of cage rotor electrical machines were considered. An eccentric rotor motion distorts the electromagnetic field in the air-gap between the stator and rotor inducing a total force, the unbalanced magnetic pull, exerted on the rotor. In this paper a low-order parametric model for the unbalanced magnetic pull is coupled with a three-dimensional finite element structural model of the electrical machine. The main contribution of the work is to present a computationally efficient electromechanical model for vibration analysis of cage rotor machines. In this model, the interaction between the mechanical and electromagnetic systems is distributed over the air gap of the machine. This enables the inclusion of rotor and stator deflections into the analysis and, thus, yields more realistic prediction for the effects of electromechanical interaction. The model was tested by implementing it for two electrical machines with nominal speeds close to one of the rotor bending critical speeds. Rated machine data was used in order to predict the effects of the electromechanical interaction on vibration characteristics of the example machines.

    AB - In this work the effects of the electromechanical interaction on rotordynamics and vibration characteristics of cage rotor electrical machines were considered. An eccentric rotor motion distorts the electromagnetic field in the air-gap between the stator and rotor inducing a total force, the unbalanced magnetic pull, exerted on the rotor. In this paper a low-order parametric model for the unbalanced magnetic pull is coupled with a three-dimensional finite element structural model of the electrical machine. The main contribution of the work is to present a computationally efficient electromechanical model for vibration analysis of cage rotor machines. In this model, the interaction between the mechanical and electromagnetic systems is distributed over the air gap of the machine. This enables the inclusion of rotor and stator deflections into the analysis and, thus, yields more realistic prediction for the effects of electromechanical interaction. The model was tested by implementing it for two electrical machines with nominal speeds close to one of the rotor bending critical speeds. Rated machine data was used in order to predict the effects of the electromechanical interaction on vibration characteristics of the example machines.

    KW - eccentric rotor

    KW - rotordynamics

    KW - rotors

    KW - unbalanced magnetic pull

    U2 - 10.1016/j.jsv.2006.11.032

    DO - 10.1016/j.jsv.2006.11.032

    M3 - Article

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    SP - 683

    EP - 698

    JO - Journal of Sound and Vibration

    JF - Journal of Sound and Vibration

    SN - 0022-460X

    IS - 4-5

    ER -