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Frequency optimization of direct drive synchronous current power generator
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences.
2005 In: IEEE Journal of Oceanic Engineering, Vol. 30, no 3Article in journal (Refereed) Published
Place, publisher, year, edition, pages
2005. Vol. 30, no 3
URN: urn:nbn:se:uu:diva-96609OAI: oai:DiVA.org:uu-96609DiVA: diva2:171246
Available from: 2008-01-11 Created: 2008-01-11Bibliographically approved
In thesis
1. Low Speed Energy Conversion from Marine Currents
Open this publication in new window or tab >>Low Speed Energy Conversion from Marine Currents
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The focus of this thesis is research on the performance of very low speed direct drive permanent magnet generators for energy conversion from marine and tidal currents. Various aspects involved in the design of these generators and their electromagnetic modelling using the finite element simulations are presented. For a detailed study, a 5 kW prototype generator has been designed and constructed based on finite element based simulations. Several experiments were conducted on the prototype generator. The experimental results were compared with the corresponding case simulations on the designed generator. The differences between the results predicted by the simulations and those predicted by the measurements were less than 10%. The part and overload performance of the generator has been investigated and it is found from both simulations and measurements that the generator is capable to efficiently operate at varying speeds. The tests on the experimental generator were made for speeds between 2 and 16 rpm and for load variations of 0.5 to 2 per unit. In this thesis it is shown that it is possible to design a very low speed direct drive generator for more or less any given marine current site and this is beneficial for projects aiming to develop a technical and economical viable marine current energy conversion system.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2007. 68 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 383
Electrical power technology, Direct Drive Generator, Finite Element Method, Marine Current Energy, Synchronous Generator, Permanent Magnet, Tidal Current Energy, Elkraftteknik
National Category
Other Engineering and Technologies
urn:nbn:se:uu:diva-8400 (URN)978-91-554-7063-0 (ISBN)
Public defence
2008-02-01, Häggsalen, Ångströmlaboratory, Lägerhyddsvägen 1, 751 21 Uppsala, 13:15 (English)
Available from: 2008-01-11 Created: 2008-01-11 Last updated: 2010-04-23Bibliographically approved

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