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

A. Tenhunen (Laboratory of Electromechanics, Department of Electrical and Communications Engineering, Helsinki University of Technology, Finland)
T.P. Holopainen (VTT Industrial Systems, Technical Research Centre of Finland, Finland)
A. Arkkio (Laboratory of Electromechanics, Department of Electrical and Communications Engineering, Helsinki University of Technology, Finland)
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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

Citation

Tenhunen, A., Holopainen, T.P. and Arkkio, A. (2003), "Spatial linearity of an unbalanced magnetic pull in induction motors during eccentric rotor motions", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 22 No. 4, pp. 862-876. https://doi.org/10.1108/03321640310482869

Publisher

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MCB UP Ltd

Copyright © 2003, MCB UP Limited

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