An electric drive with reduced content of rare earth magnets is sought after by the manufacturers of electric vehicles (EVs). A ferrite based permanent magnet assisted synchronous reluctance (PM-SynRel) machine has emerged as a viable alternative to curtail the dependence on NdFeB PM. However, inadequate torque density and demagnetization withstand capability of these machines prevent them from being used in EVs. This paper aims at identifying topologies of PM-SynRel machine which exhibits adequate torque density and demagnetization withstand capability with reduced rare earth content. Tandem arrangement of NdFeB and ferrite PMs in the flux barriers reduces rare earth content and improves demagnetization withstand capability without a significant change in output torque. Based on this, NdFeB-Ferrite-NdFeB (NFN) and FNN topologies of PM-SynRel machine are deduced as favourable choices for the EV sector. Finally, a multiphysics optimization is implemented to ascertain the performance of both NFN and FNN topologies.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Hybrid Magnet Configuration to Reduce the Content of Rare Earth Elements in a PM-SynRel Machine


    Contributors:


    Publication date :

    2020-06-01


    Size :

    956554 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Development of Motor with Heavy Rare Earth-Free Magnet for Two-Motor Hybrid System

    Ito, Yuta / Aoki, Tadanobu / Naito, Tomokazu et al. | British Library Conference Proceedings | 2019



    Development of Motor with Heavy Rare Earth-Free Magnet for Two-Motor Hybrid System

    Aoki, Tadanobu / Naito, Tomokazu / Hiranishi, Toru et al. | SAE Technical Papers | 2019


    REM-AM (rare earth magnet-all mountain) pedal assembly

    PAYNE CRAIG | European Patent Office | 2020

    Free access

    Rare earth permanent-magnet motor for electrically-driven bicycle

    Gao,Z.Y. / Huang,A.S. / Tien Jing Aviation Electro-Machinery,CN et al. | Automotive engineering | 1990