Embedded permanent magnets are widely used for electrical machines with interior-rotor. This provides better protection of the magnets and enables the use of an additional reluctance torque for torque density improvements. For external rotors, the use of surface-mounted permanent magnets is common. The following paper analyses the application of inserted magnets at exterior-rotors with segmentation to achieve an increase in torque density.High pole electrical machines are often designed with a fractional-slot concentrated winding which leads to field harmonics. Therefore, an analytical method for qualitative comparison of different winding configurations for using reluctance torque with consideration of stator field harmonics is applied. Besides rotor saliency, the magnetic flux concentration is a positive effect of interior permanent magnets. Here, the flux leakage along mechanical necessary iron bridges is crucial. With the segmented rotor geometry, these iron bridges can be avoided for interior placed magnets. This allows a flux concentration for electrical machines with a high number of pole-pairs. The paper presents a simplified geometry-based approach to describe these improvements. The method is validated with a finite element analysis (FEA) and a prototype with a segmented rotor is built.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Segmented exterior-rotor PMSM for increased torque density


    Contributors:


    Publication date :

    2023-11-29


    Size :

    5272693 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Segmented-Rotor Modular Switched Reluctance Motor With High Torque and Low Torque Ripple

    Kondelaji, Mohammad Amin Jalali / Mirsalim, Mojtaba | IEEE | 2020


    RELUCTANCE ASSISTED EXTERNAL ROTOR PMSM

    SHI RUISHENG / GHARAKHANI ARBI | European Patent Office | 2016

    Free access

    Optimization Design Of PMSM With High Torque Density and Large Overload

    Zhao, Kai / Cheng, Zhaohu / Dai, Chenxuan et al. | IEEE | 2024


    RELUCTANCE ASSISTED EXTERNAL ROTOR PMSM

    SHI RUISHENG / GHARAKHANI ARBI | European Patent Office | 2020

    Free access

    Reluctance Assisted External Rotor PMSM

    SHI RUISHENG / GHARAKHANI ARBI | European Patent Office | 2018

    Free access