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In this work the influence of semi-magnetic stator wedges on the electromagnetic characteristics and the behavior of the induction motor is investigated. The study will be carried out using FEM analysis. The spatial and time-dependant electromagnetic variables of the motors will be studied. The analysis will reveal that the application of wedges decreases the higher harmonic content of the electromagnetic...
This paper consists a study of the influence of specific design parameters on the double-cage induction motor behavior. The study is carried out using FEM analysis. Three double rotor bar induction motors have been simulated and their electromagnetic characteristics are compared to each other. The differences in the three motors' design are: the first one has a single rotor cage and the other two...
In this work, models combining NEMA's classes A and D slot geometry are created, with the use of a library of parameterized Squirrel Cage Induction Machine models. The models were analyzed using AC non-linear FEM analysis. The influences of the different analogy of class A versus class D slots in the asynchronous cage motor, on the distribution of the magnetic field, the torque as well as the stator...
The opening of the slots in the electrical motors distorts the waveform of the field in the air-gap and produces high order harmonics, which causes increased losses, torque pulsations and reduction of the efficiency of the machine. In this paper the effect of the closure of the slots of an asynchronous motor using wedges to reduce the flux pulsation is performed. Wedges of different materials have...
The self and mutual inductances of a 3-phase induction machine are calculated under healthy and broken rotor bars conditions using the finite element model of the machine. This method is more precise than the winding function approach, as it is based on the actual geometry of the machine and the machine model can easily be modified in order to study the effect of faults on the machine's performance...
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