Numerical Identification of Electromagnetic Force Parameters for Linearized Rotordynamic Model of Cage Induction Motors

Author:

Holopainen Timo P.1,Tenhunen Asmo2,Lantto Erkki3,Arkkio Antero2

Affiliation:

1. VTT Technical Research Centre of Finland, VTT Industrial Systems, P.O. Box 13022, FIN-02044 VTT, Finland

2. Laboratory of Electromechanics, Helsinki University of Technology, P.O. Box 3000, FIN-02015 HUT, Finland

3. High Speed Tech Ltd., Tekniikantie 4 D, FIN-02150 Espoo, Finland

Abstract

The electromechanical interaction in cage induction motors induces additional forces between the rotor and stator. Recently, a linear parametric model was presented for these forces and the model was validated experimentally. The effective identification of the model parameters is crucial, because the electromagnetic system is nonlinear. The aim of this study was to present how to apply the impulse response method to estimate the required parameters. The numerical results show that this method is very effective. In addition, the force model was combined with a mechanical rotor model and the feasibility for electromechanical rotor problems was demonstrated.

Publisher

ASME International

Subject

General Engineering

Reference12 articles.

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2. Belmans, R., Vandenput, A., and Geysen, W., 1987, “Calculation of the Flux Density and the Unbalanced Pull in Two Pole Induction Machines,” Archive fu¨r Electrotechnik, 70, pp. 151–161.

3. Skubov, D., and Shumakovich, I. V., 1999, “Stability of the Rotor of an Induction Motor in the Magnetic Field of the Current Windings,” Mech. Solids 34(4), pp. 28–40. (Translated from Mekhanika Tverdogo Tela, 4, pp. 36–50, 1999)

4. Arkkio, A., Antila, M., Pokki, K., Simon, A., and Lantto, E., 2000, “Electromagnetic Force on a Whirling Cage Rotor,” IEE Proceedings–Electric Power Applications, 147(5), pp. 353–360.

5. Holopainen, T. P., Tenhunen, A., and Arkkio, A., 2002, “Electromagnetic Circulatory Forces and Rotordynamic Instability in Electric Machines,” Proceedings, 6th International Conference on Rotor Dynamics, E. J. Hahn, and R. B. Randall, eds., University of New South Wales Printing Services, Sydney, Australia, Vol. 1, pp. 446–463.

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