Calculation of UMP and Effects of Breakage Faults Location on Performance Induction Machine
Khaleel J. Hammadi

Dr. Khaleel J. Hammadi, Electrical and Electronic Techniques Engineering,, Middel Technical University/ College of EEE Tecniques, Baghdad – Iraq.
Manuscript received on March 12, 2016. | Revised Manuscript received on March 25, 2016. | Manuscript published on May 05, 2016. | PP: 9-12 | Volume-6 Issue-2, May 2016. | Retrieval Number: B2579055215
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Abstract: This paper develops the foundations of a technique for diagnosis and characterization of effects of location breakage faults in squirrel-cage induction motors based on the time stepping coupled finite element method FEM. These studies are performed by using the model to compute healthy state, and four cases adjacent breakage fault the performance data, which contains time variations of torque, unbalanced magnetic pull and the distribution of magnetic field. The unbalanced magnetic pull UMP is the resultant global magnetic force that acts on the rotor due to an asymmetric magnetic field distribution in the air gap as faults condition. It can be computed by normally found during finite element analysis using Maxwell’s stress method. From these data the faulty signatures are extracted. Furthermore, this method, which could help to develop diagnostics of faults and performance evaluation of induction motors, has great potential in future applications.
Keywords: Unbalance magnetic pull; faults diagnosis; induction motors; FEM