The slot-opening structure in permanent magnet machines (PMMs) plays a crucial role in optimizing torque, electromotive force (EMF), and electromagnetic vibration metrics. Consequently, significant attention has been devoted to optimizing its design, particularly focused on reducing cogging torque through methods such as tooth shape optimization and dummy slots. However, current slot-opening design techniques face challenges, particularly in compromising average torque and inadequately suppressing cogging torque due to simplistic modifications of slot reluctance harmonics. In contrast, this study introduces a comprehensive slot harmonics configuration (SHC) method alongside diverse slot-opening design schemes, showcasing enhanced effectiveness in mitigating cogging torque in various PMM structures with different pole-slot combinations. The key of this approach involves adjusting the airgap magnetic reluctance harmonics to amplify the least common multiple (LCM) of interacting harmonics responsible for cogging torque generation. Through extensive validation via the finite-element method (FEM) and experimental test, the proposed method emerges as a promising solution for effectively reducing cogging torque and enhancing the overall performance of PMMs.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Diverse Slot-Opening Designs for Cogging Torque and Performance Optimization in PM Machines


    Contributors:
    Dai, Litao (author) / Niu, Shuangxia (author) / Gao, Jian (author) / Liu, Kun (author) / Huang, Shoudao (author) / Chan, W. L. (author)


    Publication date :

    2025-06-01


    Size :

    4970276 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Study of Cogging Torque in Permanent Magnet Machines

    Keyhani, A. | Online Contents | 1999



    Reducing the cogging torque effects in hybrid stepper machines by means of resonant controllers

    Arias Pujol, Antoni / Caum Aregay, Jesús / Ibarra Basabe, Edorta et al. | BASE | 2018

    Free access

    Effect of pole to slot ratio on cogging torque and EMF waveform in fractional slotted BLDC motor

    Lee, Kab-Jae / Kim, Tae Heoung / Baek, Soo-Hyun et al. | Tema Archive | 2004