Topology optimization of rotor core combined with identification of current phase angle in IPM motor using multistep genetic algorithm

Yoshifumi Okamoto, Yusuke Tominaga, Shinji Wakao, Shuji Sato

    Research output: Contribution to journalArticle

    9 Citations (Scopus)


    This paper derives an effective shape of the flux barrier in an interior permanent magnet (IPM) motor. IPM motors generally have many design parameters such as the current phase angle, shape of the rotor and stator's iron core, and shape and position of the magnet. The flux barrier plays an important role in controlling torque characteristics. We apply topology optimization (TO) to the rotor core using a multistep genetic algorithm to determine an effective flux barrier. Furthermore, we extend the TO to combinatorial optimization for considering its effect on the current phase angle. Thus, a reasonable flux barrier with an optimal phase angle is determined.

    Original languageEnglish
    Article number6749018
    JournalIEEE Transactions on Magnetics
    Issue number2
    Publication statusPublished - 2014 Feb



    • Flux barrier
    • genetic algorithm (GA)
    • interior permanent magnet (IPM) motor
    • multistep scheme
    • parallel computing

    ASJC Scopus subject areas

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

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