The commonly known technology of field weakening for permanent-magnet (PM) motors is achieved by controlling the direct-axis current component through an inverter. Without using mechanical variation of the air gap, a new machine approach for field weakening of PM machines by direct control of air-gap fluxes is introduced. The demagnetization situation due to field weakening is not an issue with this new method. In fact, the PMs are strengthened at field weakening. The field-weakening ratio can reach 10:1 or higher. This technology is particularly useful for the PM generators and electric vehicle drives.


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    Title :

    A Machine Approach for Field Weakening of Permanent-Magnet Motors


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Future Car Congress ; 2000



    Publication date :

    2000-04-02




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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