# Spatial linearity of an unbalanced magnetic pull in induction motors during eccentric rotor motions

A. Tenhunen, Timo Holopainen, A. Arkkio

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

### Abstract

There is an unbalanced magnetic pull between the rotor and stator of the cage induction motor when the rotor is not concentric with the stator. These forces depend on the position and motion of the centre point of the rotor. In this paper, the linearity of the forces in proportion to the rotor eccentricity is studied numerically using time‐stepping finite element analysis. The results show that usually the forces are linear in proportion to the rotor eccentricity. However, the closed rotor slots may break the spatial linearity at some operation conditions of the motor.
Original language English 862-876 COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 22 4 https://doi.org/10.1108/03321640310482869 Published - 2003 A1 Journal article-refereed

### Fingerprint

Induction Motor
Linearity
Induction motors
Rotor
Rotors
Rotors (windings)
Motion
Stators
Eccentricity
Proportion
Cage
Time Stepping
Concentric
Finite element method
Finite Element
Closed

### Keywords

• motors
• magnetic forces
• rotors

### Cite this

@article{176d62b4fe0541e2878f968c12e8ed4d,
title = "Spatial linearity of an unbalanced magnetic pull in induction motors during eccentric rotor motions",
abstract = "There is an unbalanced magnetic pull between the rotor and stator of the cage induction motor when the rotor is not concentric with the stator. These forces depend on the position and motion of the centre point of the rotor. In this paper, the linearity of the forces in proportion to the rotor eccentricity is studied numerically using time‐stepping finite element analysis. The results show that usually the forces are linear in proportion to the rotor eccentricity. However, the closed rotor slots may break the spatial linearity at some operation conditions of the motor.",
keywords = "motors, magnetic forces, rotors",
author = "A. Tenhunen and Timo Holopainen and A. Arkkio",
note = "Project code: V1SU00856",
year = "2003",
doi = "10.1108/03321640310482869",
language = "English",
volume = "22",
pages = "862--876",
journal = "COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering",
issn = "0332-1649",
publisher = "Emerald Publishing Limited",
number = "4",

}

Spatial linearity of an unbalanced magnetic pull in induction motors during eccentric rotor motions. / Tenhunen, A.; Holopainen, Timo; Arkkio, A.

In: COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, Vol. 22, No. 4, 2003, p. 862-876.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Spatial linearity of an unbalanced magnetic pull in induction motors during eccentric rotor motions

AU - Tenhunen, A.

AU - Holopainen, Timo

AU - Arkkio, A.

N1 - Project code: V1SU00856

PY - 2003

Y1 - 2003

N2 - There is an unbalanced magnetic pull between the rotor and stator of the cage induction motor when the rotor is not concentric with the stator. These forces depend on the position and motion of the centre point of the rotor. In this paper, the linearity of the forces in proportion to the rotor eccentricity is studied numerically using time‐stepping finite element analysis. The results show that usually the forces are linear in proportion to the rotor eccentricity. However, the closed rotor slots may break the spatial linearity at some operation conditions of the motor.

AB - There is an unbalanced magnetic pull between the rotor and stator of the cage induction motor when the rotor is not concentric with the stator. These forces depend on the position and motion of the centre point of the rotor. In this paper, the linearity of the forces in proportion to the rotor eccentricity is studied numerically using time‐stepping finite element analysis. The results show that usually the forces are linear in proportion to the rotor eccentricity. However, the closed rotor slots may break the spatial linearity at some operation conditions of the motor.

KW - motors

KW - magnetic forces

KW - rotors

U2 - 10.1108/03321640310482869

DO - 10.1108/03321640310482869

M3 - Article

VL - 22

SP - 862

EP - 876

JO - COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

JF - COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

SN - 0332-1649

IS - 4

ER -