US 11,936,260 B2
Stator for an electric machine, electric machine, motor vehicle, method for producing a stator
Joerg Schneider, Stuttgart (DE); Andreas Lober, Westheim (DE); Rolf Graef, Kornwestheim (DE); and Tobias Schmack, Stuttgart (DE)
Assigned to DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT, Stuttgart (DE)
Filed by Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Stuttgart (DE)
Filed on Jun. 28, 2021, as Appl. No. 17/359,700.
Claims priority of application No. 10 2020 117 464.0 (DE), filed on Jul. 2, 2020.
Prior Publication US 2022/0006343 A1, Jan. 6, 2022
Int. Cl. H02K 3/12 (2006.01); H02K 1/16 (2006.01); H02K 3/14 (2006.01); H02K 3/32 (2006.01); H02K 3/38 (2006.01); H02K 3/48 (2006.01); H02K 15/06 (2006.01)
CPC H02K 3/12 (2013.01) [H02K 1/16 (2013.01); H02K 3/14 (2013.01); H02K 3/32 (2013.01); H02K 3/48 (2013.01); H02K 15/064 (2013.01); H02K 3/38 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for producing, a stator for an electric machine, the method comprising:
providing a laminated stator core comprising stator grooves and having a plug-in side and a bending side, the bending side lying opposite the plug-in side in an axial direction;
providing a stator winding having hairpin elements, which are pushed into the stator grooves on the plug-in side of the laminated stator core and bent and electrically connected to the stator winding on the bending side of the laminated stator core;
providing an end plate with a first axial end towards the stator core and a second axial end away from the stator core, which is arranged on the plug-in side in the axial direction between the laminated stator core and the hairpin elements,
wherein the hairpin elements are arranged in the axial direction so as to bear against the end plate,
wherein the end plate is configured to conform with a surface of the laminated stator core at the first axial end, and
wherein the end plate, at the second axial end, is rounded to fully conform with and bear against part of an inner contour of each of the hairpin elements;
pushing the hairpin elements into the laminated stator core in the axial direction;
measuring a force applied to the hairpin elements while pushing the hairpin elements into the laminated stator core;
comparing the measured force applied to a maximum force value; and
concluding the pushing in when the measured force applied reaches the maximum force value.