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Longitudinal End Effects in a Linear Wave Power Generator

Author

Listed:
  • Boel Ekergård

    (Department of Industrial Economics, Electrical and Mechanical Engineering, University West, 461 86 Trollhättan, Sweden)

  • Mats Leijon

    (Swedish Centre for Renewable Electric Energy Conversion, Department on Engineering Sciences, Uppsala University, 751 21 Uppsala, Sweden
    Department of Electrical Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden)

Abstract

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.

Suggested Citation

  • Boel Ekergård & Mats Leijon, 2020. "Longitudinal End Effects in a Linear Wave Power Generator," Energies, MDPI, vol. 13(2), pages 1-11, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:2:p:327-:d:306853
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    References listed on IDEAS

    as
    1. Eriksson, Sandra & Solum, Andreas & Leijon, Mats & Bernhoff, Hans, 2008. "Simulations and experiments on a 12kW direct driven PM synchronous generator for wind power," Renewable Energy, Elsevier, vol. 33(4), pages 674-681.
    2. Leijon, M. & Danielsson, O. & Eriksson, M. & Thorburn, K. & Bernhoff, H. & Isberg, J. & Sundberg, J. & Ivanova, I. & Sjöstedt, E. & Ågren, O. & Karlsson, K.E. & Wolfbrandt, A., 2006. "An electrical approach to wave energy conversion," Renewable Energy, Elsevier, vol. 31(9), pages 1309-1319.
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    Cited by:

    1. Raju Ahamed & Kristoffer McKee & Ian Howard, 2022. "A Review of the Linear Generator Type of Wave Energy Converters’ Power Take-Off Systems," Sustainability, MDPI, vol. 14(16), pages 1-42, August.

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