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Verification of Cyclic Boundary Condition and 2D Field Model for Synchronous PM Linear Generator
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Elektricitetslära och åskforskning.
Ingår i: IEEE Transaction on MagneticsArtikel i tidskrift (Refereegranskat) Submitted
Identifikatorer
URN: urn:nbn:se:uu:diva-94986OAI: oai:DiVA.org:uu-94986DiVA, id: diva2:169029
Tillgänglig från: 2006-10-20 Skapad: 2006-10-20Bibliografiskt granskad
Ingår i avhandling
1. Wave Energy Conversion: Linear Synchronous Permanent Magnet Generator
Öppna denna publikation i ny flik eller fönster >>Wave Energy Conversion: Linear Synchronous Permanent Magnet Generator
2006 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

This thesis studies the electric aspects of a linear synchronous permanent magnet generator. The generator is designed for use in a wave energy converter, which determines the fundamental requirements of the generator. The electromagnetic properties of the generator are investigated with a finite element based simulation tool. These simulations formed the base of the design and construction of a laboratory prototype. Several experiments where conducted on the prototype generator. The results verify at large the simulation tool. However, a difference between the measured and simulated air gap flux was discovered. This was attributed to the longitudinal ends of the generator, which are ignored in the simulation tool. Experiences from the construction, and further finite element studies, led to a significant change in the support structure of the first offshore prototype generator. A complete wave energy converter was constructed and launched, the 13th of March, on the west coast of Sweden. A study of the load resistance impact on the power absorption has been carried out. An optimal load interval, with regard to power absorption, has been identified. Furthermore, the generator has proofed to withstand short term overload several times larger than the nominal load. Finally, the longitudinal ends’ influence on the flux distribution was investigated with an analytical model, as well as finite element simulations. A possible problem with large induction of eddy currents in the actuator back steel was identified.

This work is a part of a larger project, which aims do develop a viable wave energy conversion system.

Ort, förlag, år, upplaga, sidor
Uppsala: Acta Universitatis Upsaliensis, 2006. s. 102
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 232
Nyckelord
Engineering physics, Finite element method, linear synchronous generator, longitudinal end effect, permanent magnet, point absorber, offshore testing, wave power, Teknisk fysik
Identifikatorer
urn:nbn:se:uu:diva-7194 (URN)91-554-6683-4 (ISBN)
Disputation
2006-11-10, Siegbahnsalen, Ångströmlaboratoriet, Box 534, Uppsala, 13:15
Opponent
Handledare
Tillgänglig från: 2006-10-20 Skapad: 2006-10-20 Senast uppdaterad: 2013-07-26Bibliografiskt granskad

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