Due to structural attributes such as shorter axial dimensions, lighter stator weight, and easier rotor-fan integration, dual-rotor coreless stator axial flux permanent magnet (AFPM) machines with non-overlapping concentrated winding are more suitable as drive machines for counter-rotating ducted fans. However, although the elimination of the stator core reduces the weight of the machine, it also limits the torque output capability of the machine. To address the issue, first, the improvement method for the torque output capability of the machine is analyzed. Specifically, the influence of pole number on torque output capability from the perspectives of magnetomotive force (MMF) and rotor equivalent magnetic circuit is quantitatively analyzed to obtain design guideline for the pole number of the machine. Additionally, the design concept of Halbach permanent magnet (PM) array pattern based on maximum air gap flux density is investigated. To further augment the torque output capacity, an optimized PM array pattern is proposed. Subsequent to the design improvements, the torque output capability and loss characteristics of the machine are studied and compared. The torque output capability of the optimized 12-slot-14-pole (12s14p) dual-rotor coreless stator AFPM machine with non-overlapping concentrated winding has significantly increased. Finally, a coreless stator AFPM prototype is fabricated and tested for verification.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Torque Improvement of Dual-Rotor Coreless Stator AFPM Machine With Non-Overlapping Concentrated Winding for Counter- Rotating Ducted Fan Application


    Contributors:
    Gao, Huamin (author) / Huang, Weikang (author) / Zhang, Zhuoran (author) / Wang, Chen (author)


    Publication date :

    2024-12-01


    Size :

    13307326 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    A Novel Counter-Rotating Single-Stator Dual- Internal-Rotor Permanent Magnet Machine

    Ran, Zhitong / Zhu, Zi Qiang / Zhou, Yanjian et al. | IEEE | 2025


    Comparison of Dual-stator 6/4 FSPM Machine with Overlapping and Non-Overlapping Winding

    Liu, Mingda / Sixel, William / Sarlioglu, Bulent | IEEE | 2018


    Effect of Rotor Axial Spacing on Ducted Counter-rotating UAV Propeller Noise

    Jdiobe, Muwanika / Suzuki, Takao / Paul, Ryan et al. | AIAA | 2024