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Longitudinal end effects in a linear wave power generator
University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
Uppsala University, Swedish Centre for Renewable Electric Energy Conversion, Department on Engineering Sciences, Uppsala, 751 21, Sweden; Chalmers University of Technology, Department of Electrical Engineering, Gothenburg, 412 96, Sweden .
2020 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 13, no 2, article id 327Article in journal (Refereed) Published
Abstract [en]

Even though the magnetic circuit of a linear electric machine is very similar to a rotating electric machine, they diverge in one fundamental property. The linear generator is open in both ends, i.e., the magnetic circuit is non-symmetric. This paper investigates and discusses the drawbacks of this non-symmetric design in a linear permanent magnet generator, installed in a wave energy conversion system. A two-dimensional geometry has been utilized for the numerical calculations in a finite element method simulation tool. The results present an increased cogging force and significant core losses in the translator as consequences of the longitudinal ends in the machine. © 2020 by the authors.

Place, publisher, year, edition, pages
2020. Vol. 13, no 2, article id 327
Keywords [en]
Geometry; Hydroelectric generators; Magnetic circuits; Magnetism; Numerical methods; Permanent magnets; Synchronous generators; Wave power, Finite element method simulation; Fundamental properties; Linear permanent magnet generators; Longitudinal end effect; Magnetic analysis; Numerical calculation; Two-dimensional geometry; Wave energy converters, Wave energy conversion
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:hv:diva-15002DOI: 10.3390/en13020327ISI: 000520432300041Scopus ID: 2-s2.0-85077800946OAI: oai:DiVA.org:hv-15002DiVA, id: diva2:1395617
Funder
Swedish Research Council, 2009-3417Available from: 2020-02-24 Created: 2020-02-24 Last updated: 2020-04-09

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Ekergård, Boel

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