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Stator inter-turn faults are among the most important electric motor failures as they progress fast and lead to catastrophic motor breakdowns. Inter-turn faults are caused due to the windings' insulation degradation. The main stress which deteriorates the insulation is the thermal one. Proper understanding of how this stress influences the electrical properties of insulation over time may lead to...
Machines in electric vehicles are driven by switching power electronic devices and undergo variable load cycling. In transient conditions high currents and temperatures develop, forcing the electric motor and particularly the insulation materials to undergo severe multi-stress. Insulation degradation will progressively lead to short-circuits which are harmful for the traction motor, vehicle safety...
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...
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