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

4 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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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.",
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author = "Antti Laiho and Holopainen, {Timo P.} and Paul Klinge and Antero Arkkio",
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language = "English",
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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

VL - 302

SP - 683

EP - 698

JO - Journal of Sound and Vibration

JF - Journal of Sound and Vibration

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ER -