US 12,278,534 B2
Stator for an electric machine and method for applying a hairpin winding to a stator body
Korbinian Weber, Ingolstadt (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Appl. No. 17/921,433
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Apr. 29, 2021, PCT No. PCT/EP2021/061224
§ 371(c)(1), (2) Date Oct. 26, 2022,
PCT Pub. No. WO2022/002460, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 10 2020 117 153.6 (DE), filed on Jun. 30, 2020.
Prior Publication US 2023/0163650 A1, May 25, 2023
Int. Cl. H02K 3/12 (2006.01); H02K 3/28 (2006.01)
CPC H02K 3/28 (2013.01) [H02K 3/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A stator for an electric machine comprising:
a stator body with a plurality of grooves distributed in a circumferential direction of the stator body,
a hairpin winding applied to the stator body, and
conductors for a plurality of phases, each of the conductors being formed by a plurality of conductively connected conductor clips,
wherein each of the conductor clips has two groove portions, each of the two groove portions are connected by a connecting portion, and a shape or size of the conductor clip determines a skip width of the conductor clip such that the skip width defines how many grooves are skipped in the circumferential direction between the two groove portions,
wherein a respective pole of the plurality of phases is formed by a plurality of pairs of groove portions, such that each of the plurality of pairs of groove portions comprise groove portions arranged in adjacent grooves in a same layer of the hairpin winding,
wherein the conductor clips constituting the plurality of pairs of groove portions forming the respective pole thereby form a group of conductor clips, such that the group of conductor clips connects adjacent poles of a respective phase of the plurality of phases,
wherein, in the circumferential direction, there are a number of skipped grooves between the two groove portions of each of the conductor clips as defined by the skip width of the conductor clip, and
wherein at least two of the groups of conductor clips have a different variation or combination of skip widths,
wherein at least one conductor of at least one phase within a basket of the hairpin winding is formed by two layers of the hairpin winding in routed twice in a same direction about a central axis of the stator in the circumferential direction.