The existence of large inter-bar currents in three phase squirrel cage motors with rotor-bar and/or end-ring faults

An analysis is developed which describes the existence of substantial inter-bar laminar currents in large three phase squirrel cage induction motors with broken bars and/or rings. Results of experimental measurements are presented which verify the theoretical model. Also the effect of these tangential currents on the production of very large axial vibrations are shown. Copyright © 1984 by The Institute of Electrical and Electronics Engineers, Inc.