Coil Winding Losses: Decomposition Strategy

Leena Lehti, Janne Keranen, Saku Suuriniemi, Lauri Kettunen

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)

    Abstract

    Precise modeling of the magnetic field in the coil wire of an electric machine often becomes a major challenge: with the high number of turns and small penetration depth, the number of degrees of freedom exceeds reasonable limits in any standard approximation method. Precise approximation, however, is critical, e.g., to reliable coil loss estimation. Hence, there is a call for specialized approximative methods. This paper presents a method for time-harmonic coil wire field computations in 2-D problems. We replace the coil by a lattice of polygonal plane fillers and span a low-dimensional function space on the polygon boundaries. The reliability of loss estimates requires accurate computations of the responses to the interface excitations of this space. The responses constitute a Dirichlet-to-Neumann map to efficiently couple plane fillers together and to a standard finite-element method (FEM) outside the coil regions. The outcome is significantly faster than the standard FEM alone. The results are still in good agreement.

    Original languageEnglish
    Article number7229333
    JournalIEEE Transactions on Magnetics
    Volume52
    Issue number1
    DOIs
    Publication statusPublished - 1 Jan 2016
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Decomposition
    Fillers
    Wire
    Finite element method
    Electric machinery
    Magnetic fields

    Keywords

    • coil loss
    • Dirichlet-to-Neumann map
    • eddy current
    • electrical machine

    Cite this

    Lehti, Leena ; Keranen, Janne ; Suuriniemi, Saku ; Kettunen, Lauri. / Coil Winding Losses : Decomposition Strategy. In: IEEE Transactions on Magnetics. 2016 ; Vol. 52, No. 1.
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    Coil Winding Losses : Decomposition Strategy. / Lehti, Leena; Keranen, Janne; Suuriniemi, Saku; Kettunen, Lauri.

    In: IEEE Transactions on Magnetics, Vol. 52, No. 1, 7229333, 01.01.2016.

    Research output: Contribution to journalArticleScientificpeer-review

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    T1 - Coil Winding Losses

    T2 - Decomposition Strategy

    AU - Lehti, Leena

    AU - Keranen, Janne

    AU - Suuriniemi, Saku

    AU - Kettunen, Lauri

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