This article investigates permanent-magnet (PM) vernier (PMV) machines with fractional-slot nonoverlapping winding (FSNW) for direct-drive applications. The field-modulation characteristics of PMV machines with FSNW, including surface-mounted PMV (SPMV) and consequent-pole PMV (CPMV) machines, are analyzed through analytical modeling of relative permeance. The analysis shows that, compared to the SPMV machine, the CPMV machine exhibits a lower constant and a higher first-order airgap relative permeance, leading to a lower and higher airgap flux density of the unmodulated and modulated harmonic in the CPMV machine, respectively. To exploit the advantage of the higher airgap flux density of the modulated harmonic in the CPMV machine, the slot-pole combination with a relatively high gear ratio is employed. Consequently, the presented CPMV machine with FSNW not only delivers higher torque with even reduced PM materials than its SPMV counterpart, but also outperforms the regular PMV machines with FSNW in torque production and PM utilization ratio at a high power factor level. A comprehensive comparison is conducted to evaluate the performances of regular and presented PMV machines with FSNW, as well as PMV machines with distributed winding (DW). Finally, a prototype of the presented CPMV machine with FSNW is manufactured and tested for experimental validation.


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    Titel :

    Investigation of Permanent-Magnet Vernier Machine With Fractional-Slot Nonoverlapping Windings for Direct-Drive Application


    Beteiligte:
    Cao, Libing (Autor:in) / Zuo, Yuefei (Autor:in) / Zhu, Xuhui (Autor:in) / Xie, Shuangchun (Autor:in) / Lee, Christopher H. T. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.06.2024


    Format / Umfang :

    6387907 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch