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Fast analytical model of induction motor for approaching rotor eccentricity

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Deals with the problem of the electromagnetic torque calculation in the case of either nonuniformity of the air-gap or eccentricity of the rotor. The electromagnetic field distributions have been evaluated for drag-cup motors. An analytical model has been introduced for linear motor based on the variation method for magnetic flux density magnitudes. The total torque and its components have been evaluated for the motors chosen. The decrease of the electromagnetic torque and increase of eddy-current losses have been discussed due to either rotor circular asymmetry or its eccentricity.

Keywords: Eccentricities; Electromagnetic Torque; Flux; Rotor

Document Type: Research Article

DOI: http://dx.doi.org/10.1108/03321649910296582

Publication date: April 1, 1999

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