Cooling cap for a stator of an electrical machine of a motor vehicle, stator and motor vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsJulian Blum, Andreas Huber, Jerome Ragot, Jens Richter
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Abstract
A cooling cap for a stator of an electrical machine of a motor vehicle is provided. The cooling cap can be fitted onto an end winding of electrical windings of the stator which project beyond an axial end of a laminated core of the stator and which cooling cap is designed as a heat sink for cooling the end winding, wherein the cooling cap is formed, at least in regions, from an electrical insulating material. A stator and a motor vehicle including the cooling cap are also provided.
Claims18
A cooling cap for a stator of an electric machine of a motor vehicle, the cooling cap having a structure that can be placed onto a winding head of electric windings of the stator, the electric windings being configured to protrude beyond an axial end of a laminated core of the stator, and the cooling cap is configured as a cooling element for cooling the winding head, wherein the cooling cap is formed, at least in regions thereof, from an electric insulation material;
- wherein a surface structure which is dependent on a predefined main rotational direction of a rotor of the electric machine, is configured on a surface of the cooling cap facing an inner region of the stator, the surface structure is designed, in the case of operation of the rotor in the predefined main rotational direction, to discharge oil in an axial direction out of an air gap between the stator and the rotor, and the rotor is mounted in the inner region.
A stator for an electric machine of a motor vehicle having a hollow-cylindrical laminated core and electric windings which are configured so as to protrude beyond at least one axial end of the hollow-cylindrical laminated core with a configuration of a winding head, and having a cooling cap, the cooling cap having a structure that can be placed onto the winding head, the electric windings being configured to protrude beyond an axial end of the hollow-cylindrical laminated core of the stator, and the cooling cap being configured as a cooling element for cooling the winding head, wherein the cooling cap is formed, at least in regions thereof, from an electric insulation material, and wherein the cooling cap is placed on the winding head;
- wherein a surface structure which is dependent on a predefined main rotational direction of a rotor of the electric machine, is configured on a surface of the cooling cap facing an inner region of the stator, the surface structure is designed, in the case of operation of the rotor in the predefined main rotational direction, to discharge oil in an axial direction out of an air gap between the stator and the rotor, and the rotor is mounted in the inner region.
A motor vehicle having an electric machine comprising a stator having a hollow-cylindrical laminated core and electric windings which are configured so as to protrude beyond at least one axial end of the hollow-cylindrical laminated core with a configuration of a winding head, and having a cooling cap, the cooling cap having a structure that can be placed onto the winding head, the electric windings being configured to protrude beyond an axial end of the hollow-cylindrical laminated core of the stator, and the cooling cap being configured as a cooling element for cooling the winding head, wherein the cooling cap is formed, at least in regions thereof, from an electric insulation material, and wherein the cooling cap is placed on the winding head;
- wherein a surface structure which is dependent on a predefined main rotational direction of a rotor of the electric machine, is configured on a surface of the cooling cap facing an inner region of the stator, the surface structure is designed, in the case of operation of the rotor in the predefined main rotational direction, to discharge oil in an axial direction out of an air gap between the stator and the rotor, and the rotor is mounted in the inner region.
Dependencies are inferred from the claim text.