PREDICTION OF THERMAL CONDITION OF CAGE-ROTOR INDUCTION MOTORS UNDER NON-STANDARD SUPPLY SYSTEMS

Prediction of Thermal Condition of Cage-rotor Induction Motors under Non-standard Supply Systems

A hybrid thermal model for accurate estimation of thermal condition of cagerotor induction motors under non-standard supply systems has been presented. The developed thermal model is a combination of lumped and distributed thermal parameters which are available from motor dimensions and other physical constants. The thermal condition of the motor under non-standard supply systems such as unbala...

Electromagnetic forces in cage induction motors with rotor eccentricity

The paper deals with the electromagnetic forces in induction machines when the rotor is performing eccentric motion with respect to the stator. The studied eccentric motions of the rigid cage rotor are cylindrical circular whirling motion, symmetric conical whirling motion and the combination of these two basic modes of eccentric motions. The multi-slice, time stepping finite element analysis i...

Double-Cage Induction motors behavior under Flicker Conditions

Induction Motors Thermal Monitoring by Means of Rotor Resistance Identification

Rotor and stator temperature are of concern in both shortterm machine protection and in longer term condition monitoring for large induction machines. Especially, when operating with overload cycles, it is necessary to monitor rotor bars and stator winding temperatures to make sure that the temperature remains below prescribed limits. The purpose of this paper is to present a thermal monitoring...

double-cage induction motors behavior under flicker conditions

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