Title :
The influence of rotor skew on unbalanced magnetic pull in cage induction motors with eccentric rotors
Author_Institution :
Robert Gordon Univ., Aberdeen, UK
Abstract :
A simple coupled circuit model has been developed in order to assess the effect of rotor skew on the UMP (unbalanced magnetic pull) in a cage induction motor with dynamic rotor eccentricity. It was found that, with further refinement, the model may be suitable for predicting UMP over the steady-state operating range of the motor but is inaccurate at higher slips due to it not accounting for other MMF waves. Higher eccentricities also lead to inaccuracy because of the restricted range field components due to permeance modulation which are taken into account
Keywords :
air gaps; machine testing; machine theory; magnetic variables measurement; rotors; slip (asynchronous machines); squirrel cage motors; air gap fields; air gap permeance waves; cage induction motors; coupled circuit model; dynamic rotor eccentricity; eccentric rotors; permeance modulation; rotor skew; slip; steady-state operating range; unbalanced magnetic pull;
Conference_Titel :
Electrical Machines and Drives, 1995. Seventh International Conference on (Conf. Publ. No. 412)
Conference_Location :
Durham
Print_ISBN :
0-85296-648-2
DOI :
10.1049/cp:19950837
