A brushless winding field rotational electric machine 10 includes: a stator 3, which is held to a case 5, including an alternating-current coil 14 configured to generate a rotation magnetic field by alternating current; a field core 6, which is held to the case 5, including a field coil 2 to be excited by direct current; and a rotor 1 disposed on an outer periphery of a rotation member 4 and rotatably held about a rotational axis 7 thereof relative to the stator 3 and the field coil 2. The field coil 2 includes a plurality of coil winding layers 201-204 stacked in a radial direction of the rotational axis 7. A cross-sectional area along an axial direction of the rotational axis 7, of a coil winding layer 204 closest to the rotational axis 7 in the radial direction of the rotational axis 7 is smaller than a cross-sectional area along the axial direction of the rotational axis 7, of a coil winding layer 201 farthest from the rotational axis 7 in the radial direction of the rotational axis 7.


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    Title :

    ROTATIONAL ELECTRIC MACHINE


    Additional title:

    ELEKTRISCHE ROTATIONSMASCHINE
    MACHINE ÉLECTRIQUE ROTATIVE


    Contributors:

    Publication date :

    2021-01-27


    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 / F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen



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