Improvement of torque characteristics for a synchronous reluctance motor using MMA-based topology optimization method

Yoshifumi Okamoto, Reona Hoshino, Shinji Wakao, Tomonori Tsuburaya

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    10 Citations (Scopus)


    Because a synchronous reluctance motor (SynRM) does not require permanent magnets, its industrial applications focus on lowering manufacturing costs. However, the SynRM has disadvantages. It experiences a lower average torque and oscillations derived from torque ripple compared to a permanent magnet-based motor. Therefore, the improvement of torque characteristics is investigated using topology optimization (TO) method which allows a greater variety of rotor structure than the shape optimization technique and does not require the concrete initial structure. Although the level set method is well known among TO methods, the smoothed-heaviside-function-based TO implemented by method of moving asymptotes is more suitable due to the feasibility of implementing the physical structure and the convergence speed. In this paper, the reasonable structure of rotor core in SynRM is investigated using TO method to improve the torque characteristic.

    Original languageEnglish
    Article number8094935
    JournalIEEE Transactions on Magnetics
    Issue number3
    Publication statusPublished - 2018 Mar 1



    • Heaviside function
    • method of moving asymptotes (MMA)
    • synchronous reluctance motor (SynRM)
    • topology optimization (TO)

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

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