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Karlsson, Thommy
Publications (3 of 3) Show all publications
Karlsson, M., Perers, R., Gustavsson, R., Aidanpää, J.-O., Karlsson, T. & Leijon, M. (2006). Rotor dynamical analysis of a hydroelectric generator for active power (ed.). In: (Ed.), (Ed.), Proceedings: International Symposium on Water Resources and Renewable Energy Development in Asia : Asia 2006, Bangkok, Thailand, November 30 - December 1, 2006. Paper presented at International Symposium on Water Resources and Renewable Energy Development in Asia : 30/11/2006 - 01/12/2006. Singapore: Aqua-Media International
Open this publication in new window or tab >>Rotor dynamical analysis of a hydroelectric generator for active power
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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, Published 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
National Category
Other Mechanical Engineering Applied Mechanics
Research subject
Computer Aided Design; Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-39129 (URN)dc1587a0-7a5c-11db-8824-000ea68e967b (Local ID)dc1587a0-7a5c-11db-8824-000ea68e967b (Archive number)dc1587a0-7a5c-11db-8824-000ea68e967b (OAI)
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: 2016-10-03 Last updated: 2023-09-05Bibliographically approved
Cervantes, M., Aidanpää, J.-O., Glavatskikh, S. & Karlsson, T. (2005). Group dynamics [hydro power equipment] (ed.). International Water Power and Dam Construction, 57(12), 40-45
Open this publication in new window or tab >>Group dynamics [hydro power equipment]
2005 (English)In: International Water Power and Dam Construction, ISSN 0306-400X, Vol. 57, no 12, p. 40-45Article in journal (Other academic) Published
Abstract [en]

An interdisciplinary research group was created at the Lulea University of Technology in Sweden to help develop world leading competencies and knowledge for cutting-edge technologies in hydro power generation. Based on the studies of this Swedish research group, this paper provides a description of the power system from a dynamic point of view to obtain an overall picture, and is completed with a detailed description of the bearings and turbines. The state-of-the-art in each field is presented, together with suggestions for further development

National Category
Fluid Mechanics and Acoustics Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Fluid Mechanics; Machine Elements
Identifiers
urn:nbn:se:ltu:diva-15370 (URN)ee0b0dc0-8d55-11db-8975-000ea68e967b (Local ID)ee0b0dc0-8d55-11db-8975-000ea68e967b (Archive number)ee0b0dc0-8d55-11db-8975-000ea68e967b (OAI)
Note

Godkänd; 2005; 20060923 (cira)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2024-01-19Bibliographically approved
Cervantes, M., Aidanpää, J.-O., Glavatskih, S. & Karlsson, T. (2005). Interdisciplinary research in full-scale hydropower machines at Porjus, Jokkmokk, Sweden (ed.). International Water Power and Dam Construction, 57(12), 40-44
Open this publication in new window or tab >>Interdisciplinary research in full-scale hydropower machines at Porjus, Jokkmokk, Sweden
2005 (English)In: International Water Power and Dam Construction, ISSN 0306-400X, Vol. 57, no 12, p. 40-44Article in journal (Other academic) Published
National Category
Other Mechanical Engineering Fluid Mechanics and Acoustics Applied Mechanics Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Computer Aided Design; Fluid Mechanics; Solid Mechanics; Machine Elements
Identifiers
urn:nbn:se:ltu:diva-4131 (URN)201ead60-c282-11db-9ea3-000ea68e967b (Local ID)201ead60-c282-11db-9ea3-000ea68e967b (Archive number)201ead60-c282-11db-9ea3-000ea68e967b (OAI)
Note

Godkänd; 2005; 20070114 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2024-01-19Bibliographically approved

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