Calculation of unbalanced magnetic pull in small cage induction motors with skewed rotors and dynamic rotor eccentricity

Author

Dorrell, D.G.

Author_Institution

Sch. of Electron. & Electr. Eng., Robert Gordon´´s Univ., Aberdeen, UK

Volume

11

Issue

3

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

483

Lastpage

488

Abstract

This paper sets out a simple analytical model which is able to account for the damping effects of a cage rotor on the unbalanced magnetic pull (UMP) when the rotor is dynamically eccentric. The algorithm is implemented for a 4-pole cage induction motor with a variety of rotors with different rotor eccentricity and skew. The model is verified by the assessment of the UMP vibration when the different rotors are fitted in the stator. The characteristics are compared and it is found that the predicted and measured UMP characteristics compare well. It is observed that skewing the rotor cage increases the UMP when the motor is loaded

Keywords

damping; digital simulation; electric machine analysis computing; machine theory; magnetic variables measurement; rotors; simulation; squirrel cage motors; 4-pole cage induction motors; computer simulation; damping effects; dynamic rotor eccentricity; magnetic pull measurement; skewed rotors; stator; unbalanced magnetic pull; unbalanced magnetic pull vibration; Analytical models; Boring; Damping; Displacement measurement; Force measurement; Harmonic analysis; Induction motors; Rotation measurement; Rotors; Stators;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.536997

Filename

536997