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Small shape deviations causes complex dynamics in large electric generators
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0001-6016-6342
Department of Forest Resource Management, Swedish University of Agricultural Sciences.
2014 (English)In: European Physical Journal: Applied physics, ISSN 1286-0042, E-ISSN 1286-0050, Vol. 66, no 2, article id 130447Article in journal (Refereed) Published
Abstract [en]

We prove that combinations of small eccentricity, ovality and/or triangularity in the rotor and stator can produce complex whirling motions of an unbalanced rotor in large synchronous generators. It is concluded which structures of shape deviations that are more harmful, in the sense of producing complex whirling motions, than others. For each such structure, we derive simplified equations of motions from which we conclude analytically the relation between shape deviations and mass unbalance that yield non-smooth whirling motions. Finally we discuss validity of our results in the sense of modeling of the unbalanced magnetic pull force

Place, publisher, year, edition, pages
2014. Vol. 66, no 2, article id 130447
National Category
Other Mechanical Engineering
Research subject
Computer Aided Design
Identifiers
URN: urn:nbn:se:ltu:diva-5039DOI: 10.1051/epjap/2014130447ISI: 000338424300012Scopus ID: 2-s2.0-84902121926Local ID: 30f0b19e-0abf-4689-bd29-c3efb6ab4e3cOAI: oai:DiVA.org:ltu-5039DiVA, id: diva2:977913
Note
Validerad; 2014; 20140623 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Lundström, NiklasAidanpää, Jan-Olov

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