An electric machine includes a stator rotatably supporting a rotor, the rotor includes a stacked rotor laminations forming a rotor core with cavities having magnets arranged in the cavities through at least two adjacent rotor laminations and parallel to a rotor central axis, each lamination including an outer edge having grooves or scallops arranged asymmetrically about the circumference to reduce torque ripple. At least one groove or scallop may be arranged along a q-axis and at least one groove or scallop may be arranged between a q-axis and a d-axis of the rotor core. The laminations may be substantially identical with a first group of laminations flipped or rotated about a diametric axis relative to a second group of laminations. An electrified vehicle includes an electric machine powered by a traction battery, the electric machine having a rotor core with stacked rotor laminations having a scalloped outer edge.


    Access

    Download


    Export, share and cite



    Title :

    ELECTRIC MACHINE AND VEHICLE HAVING ASYMMETRIC ROTOR LAMINATIONS


    Contributors:
    DENG CHUAN (author) / DU GUOHUA (author) / YUAN YIGANG (author)

    Publication date :

    2022-03-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



    Electric machine and vehicle having asymmetric rotor laminations

    DENG CHUAN / DU GUOHUA / YUAN YIGANG | European Patent Office | 2025

    Free access

    ROTOR LAMINATION FOR AN ELECTRIC MACHINE, ELECTRIC MACHINE, VEHICLE AND METHOD FOR PRODUCING ROTOR LAMINATIONS

    KOCH RAPHAEL / HAEUSER VIKTOR / LIU WENBO | European Patent Office | 2025

    Free access

    Methods and systems for oil cooled rotor laminations

    DEVREESE THIBAULT / VANHEE STEVEN / DRUANT JOACHIM | European Patent Office | 2023

    Free access


    Rotor for an electric machine and electric machine having a rotor

    KEHR ULRICH / EGGLER JOCHEN | European Patent Office | 2023

    Free access