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Estimating forces in mixed eccentricities motion for purley dynamic eccentric rotor centre motion in a hydropower generator and their validation against EM simulations
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
DEE Universitat Politècnica de Catalunya , El Grupo de Compatibilidad Electromagnética GCEM, Barcelona.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0001-6016-6342
2015 (English)In: Balkan Journal of Electrical and Computer Engineering, ISSN 2147-284X, Vol. 3, no 2, p. 78-87Article in journal (Refereed) Published
Abstract [en]

Electromagnetic analysis of hydropower generators is commonpractice but there is little emphasis on studying the effect ofrotor whirling in the analysis. This paper demonstrates the use ofthe unbalanced magnetic pull (UMP) curves based on purely dynamiceccentricity motion for a wide range of whirling frequencies in theprediction of the steady state UMP in the case of mixed eccentricitiesmotion. The latter motion type is more realistic in practice. Actualelectromagnetic (EM) simulations are also carried out for these mixedeccentricities motion cases in order to verify the proposed method. Goodagreement between the UMP from the actual EM simulations and theUMP predictions are made when low eccentricities exist. The proposedmethod is thus very useful since firstly, very few EM software packagescan handle mixed eccentricities motion and secondly, since actual EMsimulations of intricate rotor centre motion are time-consuming, theproposed method is a big time saver. A modified feature selective validation(FSV) method, the FSV-UPC, is also applied to assess the similarities andthe differences in the force computations.

Place, publisher, year, edition, pages
2015. Vol. 3, no 2, p. 78-87
National Category
Applied Mechanics Other Mechanical Engineering
Research subject
Solid Mechanics; Computer Aided Design
Identifiers
URN: urn:nbn:se:ltu:diva-8294DOI: 10.17694/bajece.76372Local ID: 6ca14c81-7824-4cec-a74f-e0985e174825OAI: oai:DiVA.org:ltu-8294DiVA, id: diva2:981186
Note
Godkänd; 2015; 20150702 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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