End-winding vibrations caused by steady-state magnetic forces in an induction machine

Ranran Lin, Antti Laiho, Ari Haavisto, Antero Arkkio

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)

Abstract

We conducted a 3-D electromagnetic analysis coupled with a 3-D mechanical analysis to analyze end-winding vibrations and deformation in an induction machine caused by steady-state magnetic forces on the end winding. Both the analyses were based on the finite-element method. The electromagnetic analysis was used to calculate magnetic forces. During the mechanical analysis, complex support structures in the end region were simplified. We first updated and validated the mechanical model according to a modal model obtained from a modal test, and afterward analyzed deformation, vibrations, and stresses. According to the analysis, the shape of the rotary dynamic deformation of the end winding caused by dynamic forces is similar to the most excitable mode shape though the natural frequency of that mode is much higher than the excitation frequency. The static deformation caused by static forces tends to expand the coil ends outward. Under both types of deformation, the nose portion of the coil ends experiences larger displacement, but von Mises stresses are larger mainly in the knuckle portion.
Original languageEnglish
Pages (from-to)2665-2674
JournalIEEE Transactions on Magnetics
Volume46
Issue number7
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Fingerprint

Natural frequencies
Finite element method

Keywords

  • End winding
  • Finite-element method
  • Magnetic force
  • Modal testing
  • Vibration

Cite this

Lin, Ranran ; Laiho, Antti ; Haavisto, Ari ; Arkkio, Antero. / End-winding vibrations caused by steady-state magnetic forces in an induction machine. In: IEEE Transactions on Magnetics. 2010 ; Vol. 46, No. 7. pp. 2665-2674.
@article{a060be78ee38498b94b616eb1a4f0bc3,
title = "End-winding vibrations caused by steady-state magnetic forces in an induction machine",
abstract = "We conducted a 3-D electromagnetic analysis coupled with a 3-D mechanical analysis to analyze end-winding vibrations and deformation in an induction machine caused by steady-state magnetic forces on the end winding. Both the analyses were based on the finite-element method. The electromagnetic analysis was used to calculate magnetic forces. During the mechanical analysis, complex support structures in the end region were simplified. We first updated and validated the mechanical model according to a modal model obtained from a modal test, and afterward analyzed deformation, vibrations, and stresses. According to the analysis, the shape of the rotary dynamic deformation of the end winding caused by dynamic forces is similar to the most excitable mode shape though the natural frequency of that mode is much higher than the excitation frequency. The static deformation caused by static forces tends to expand the coil ends outward. Under both types of deformation, the nose portion of the coil ends experiences larger displacement, but von Mises stresses are larger mainly in the knuckle portion.",
keywords = "End winding, Finite-element method, Magnetic force, Modal testing, Vibration",
author = "Ranran Lin and Antti Laiho and Ari Haavisto and Antero Arkkio",
year = "2010",
doi = "10.1109/TMAG.2010.2044043",
language = "English",
volume = "46",
pages = "2665--2674",
journal = "IEEE Transactions on Magnetics",
issn = "0018-9464",
publisher = "IEEE Institute of Electrical and Electronic Engineers",
number = "7",

}

End-winding vibrations caused by steady-state magnetic forces in an induction machine. / Lin, Ranran; Laiho, Antti; Haavisto, Ari; Arkkio, Antero.

In: IEEE Transactions on Magnetics, Vol. 46, No. 7, 2010, p. 2665-2674.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - End-winding vibrations caused by steady-state magnetic forces in an induction machine

AU - Lin, Ranran

AU - Laiho, Antti

AU - Haavisto, Ari

AU - Arkkio, Antero

PY - 2010

Y1 - 2010

N2 - We conducted a 3-D electromagnetic analysis coupled with a 3-D mechanical analysis to analyze end-winding vibrations and deformation in an induction machine caused by steady-state magnetic forces on the end winding. Both the analyses were based on the finite-element method. The electromagnetic analysis was used to calculate magnetic forces. During the mechanical analysis, complex support structures in the end region were simplified. We first updated and validated the mechanical model according to a modal model obtained from a modal test, and afterward analyzed deformation, vibrations, and stresses. According to the analysis, the shape of the rotary dynamic deformation of the end winding caused by dynamic forces is similar to the most excitable mode shape though the natural frequency of that mode is much higher than the excitation frequency. The static deformation caused by static forces tends to expand the coil ends outward. Under both types of deformation, the nose portion of the coil ends experiences larger displacement, but von Mises stresses are larger mainly in the knuckle portion.

AB - We conducted a 3-D electromagnetic analysis coupled with a 3-D mechanical analysis to analyze end-winding vibrations and deformation in an induction machine caused by steady-state magnetic forces on the end winding. Both the analyses were based on the finite-element method. The electromagnetic analysis was used to calculate magnetic forces. During the mechanical analysis, complex support structures in the end region were simplified. We first updated and validated the mechanical model according to a modal model obtained from a modal test, and afterward analyzed deformation, vibrations, and stresses. According to the analysis, the shape of the rotary dynamic deformation of the end winding caused by dynamic forces is similar to the most excitable mode shape though the natural frequency of that mode is much higher than the excitation frequency. The static deformation caused by static forces tends to expand the coil ends outward. Under both types of deformation, the nose portion of the coil ends experiences larger displacement, but von Mises stresses are larger mainly in the knuckle portion.

KW - End winding

KW - Finite-element method

KW - Magnetic force

KW - Modal testing

KW - Vibration

U2 - 10.1109/TMAG.2010.2044043

DO - 10.1109/TMAG.2010.2044043

M3 - Article

VL - 46

SP - 2665

EP - 2674

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 7

ER -