Title :
Inter-bar currents in induction machines
Author :
Dorrell, David G. ; Miller, T.J.E. ; Rasmussen, Claus B.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Glasgow, UK
Abstract :
This paper presents a simple but effective model for predicting the effects of inter-bar rotor current on the performance of a three-phase squirrel-cage induction motor. The model takes the form of a matrix that is solved in order to obtain values for the rotor resistance and reactance parameters in the standard per-phase equivalent circuit. The model is verified by tests on an induction motor with modified rotors (either one or two missing end-rings). The inter-bar resistance is also measured for the test-motor rotor and the results put forward with a discussion of the procedure. Good correlation is found between the predicted and experimental results.
Keywords :
electric reactance; electric resistance measurement; equivalent circuits; machine testing; machine theory; rotors; squirrel cage motors; 1.1 kW; induction machines; inter-bar currents; inter-bar resistance; inter-bar rotor current; matrix; reactance parameters; standard per-phase equivalent circuit; test-motor rotor; three-phase squirrel-cage induction motor; two-pole induction motor; Bars; Circuit testing; Electrical resistance measurement; Equivalent circuits; Induction machines; Induction motors; Industry Applications Society; Iron; Predictive models; Rotors;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2003.810643
