Rotor dynamical analysis of a hydroelectric generator for active power
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)
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
IdentifiersURN: urn:nbn:se:ltu:diva-39129Local ID: dc1587a0-7a5c-11db-8824-000ea68e967bOAI: oai:DiVA.org:ltu-39129DiVA: diva2:1012638
International Symposium on Water Resources and Renewable Energy Development in Asia : 30/11/2006 - 01/12/2006
Godkänd; 2006; Bibliografisk uppgift: CD-ROM; 20061121 (karmar)2016-10-032016-10-03Bibliographically approved