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dc.rights.licenseRestricted to current Rensselaer faculty, staff and students. Access inquiries may be directed to the Rensselaer Libraries.
dc.contributorSalon, S. J. (Sheppard Joel), 1948-
dc.contributorDegeneff, Robert C.
dc.contributorGlinkowski, Mieczyslaw T.
dc.contributorHesse, M. Harry
dc.contributorSlavik, C. J.
dc.contributor.authorDeBortoli, Mark J.
dc.date.accessioned2021-11-03T08:42:02Z
dc.date.available2021-11-03T08:42:02Z
dc.date.created2016-11-01T11:17:06Z
dc.date.issued1992-05
dc.identifier.urihttps://hdl.handle.net/20.500.13015/1810
dc.descriptionMay 1992
dc.descriptionSchool of Engineering
dc.description.abstractThis thesis deals with the electromechanical analysis of induction machines using the finite element method. The primary objective is the computation of magnetically induced forces and force distributions in the machine that produce vibration and noise, given the geometry, winding layout, material characteristics, and source voltage waveform of the machine. Contributions are made in two general areas: the computation of forces from finite element solutions for electromagnetic fields, and the modelling of electric machines using finite element analysis.
dc.description.abstractThen the model is used to study the effects of rotor eccentricity, parallel connection of stator poles, magnetic saturation, and stator slot closure on vibration inducing forces and force waves. The finite element-based model provides the first opportunity to model these effects in quantitative detail. The forces and force waves produced by rotor eccentricity are determined, and the reduction of these forces by XIV parallel pole connection is demonstrated. Detrimental force waves produced by magnetic saturation are calculated. Stator slot closure is shown to reduce force waves due to slotting, but increase force waves due to saturation.
dc.description.abstractThe modelling of electric machines is performed using a transient, finite element model of induction machine electromechanical dynamics. The airgap flux density and force distribution data produced by the model are decomposed into sinusoidal travelling waves in space and time using a two-dimensional Fast Fourier Transform technique. The modelling method is verified using a base case study of an induction motor by comparing the computed travelling waves with those predicted by established theory.
dc.description.abstractThe investigation of force computation from finite element field solutions concerns both global (net) forces and force distributions (sets of local forces). The difficulties of global force computation are analyzed, and an original method for determining local forces is introduced. The method is specifically adapted for finite element analysis, and can be used to compute magnetically-induced forces within or on the surface of linear or nonlinear magnetic material.
dc.language.isoENG
dc.publisherRensselaer Polytechnic Institute, Troy, NY
dc.relation.ispartofRensselaer Theses and Dissertations Online Collection
dc.subjectElectric Power Engineering
dc.titleExtensions to the finite element method for the electromechanical analysis of electric machines
dc.typeElectronic thesis
dc.typeThesis
dc.digitool.pid177685
dc.digitool.pid177686
dc.digitool.pid177688
dc.digitool.pid177687
dc.digitool.pid177689
dc.rights.holderThis electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
dc.description.degreePhD
dc.relation.departmentDept. of Electric Power Engineering


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