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Rotor dynamical analysis of a hydroelectric generator for active power
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
Uppsala University.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
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2006 (English)In: Proceedings: International Symposium on Water Resources and Renewable Energy Development in Asia : Asia 2006, Bangkok, Thailand, November 30 - December 1, 2006, Singapore: Aqua-Media International , 2006Conference paper (Other academic)
Abstract [en]

Asymmetry of the magnetic field in a synchronous generator will induce a magnetic unbalance pull. In this paper, a hydropower rotor system is modelled and the influence of electro-mechanical forces due to different amounts of real power is analysed. The electromagnetic field is solved with the finite element method and coupled with mechanical system as a magnetic stiffness. The mechanical model of the generator consists of a four degree of freedom rigid disc connected to an elastic shaft supported by two bearings with linear properties. It has been found that the unbalance magnetic pull increases for a lover amount of real power leading to a decrease of natural frequencies and an increase of unbalance response. Since many hydropower units are used for both part and full load it becomes important to model the electro-mechanical interaction when developing new generators, in order to improve the mechanical design.

Place, publisher, year, edition, pages
Singapore: Aqua-Media International , 2006.
Research subject
Computer Aided Design; Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-39129Local ID: dc1587a0-7a5c-11db-8824-000ea68e967bOAI: oai:DiVA.org:ltu-39129DiVA: diva2:1012638
Conference
International Symposium on Water Resources and Renewable Energy Development in Asia : 30/11/2006 - 01/12/2006
Note
Godkänd; 2006; Bibliografisk uppgift: CD-ROM; 20061121 (karmar)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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Karlsson, MartinGustavsson, RolfAidanpää, Jan-OlovKarlsson, Thommy
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