US 12,451,749 B2
Stator for an electrical machine
Michael Kerschbaumer, Sennwald (CH); Marco Cossale, Sennwald (CH); Daniel Oeschger, Sennwald (CH); and Tian Zhou, Sennwald (CH)
Assigned to BRUSA TECHNOLOGY AG, Buchs (CH)
Appl. No. 18/010,618
Filed by BRUSA Technology AG, Buchs (CH)
PCT Filed May 31, 2021, PCT No. PCT/EP2021/064584
§ 371(c)(1), (2) Date Dec. 15, 2022,
PCT Pub. No. WO2021/254772, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 10 2020 116 286.3 (DE), filed on Jun. 19, 2020.
Prior Publication US 2023/0299632 A1, Sep. 21, 2023
Int. Cl. H02K 3/50 (2006.01); H02K 1/16 (2006.01); H02K 3/28 (2006.01)
CPC H02K 3/50 (2013.01) [H02K 1/16 (2013.01); H02K 3/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stator for an n-phase electrical machine, where n is larger than one, the stator comprising:
a first axial end face and a second axial end face;
an inner circumferential surface;
a machine axis;
a plurality of stator slots, each stator slot comprising two or more shaped strands, wherein the shaped strands are arranged in separate layers inside the stator slots, in at least an inner layer and an outer layer;
each shaped strand being a stranded conductor and having a first end and a second end;
first ends of the shaped strands extending from the first axial end face, and second ends extending from the second axial end face, in each case parallel to the machine axis;
a plurality of first end connectors of a first connector type being arranged to electrically connect the first ends and a plurality of second end connectors being arranged to electrically connect the second ends, thereby forming stator winding sections of the electrical machine;
a plurality of further connectors being arranged to connect the first ends and thereby to connect stator winding sections to form at least one of parallel and serial arrangements of the stator winding sections, wherein the further connectors are each manufactured from at least one piece of sheet metal by cutting and bending, and in that they each comprise at least one bridge section in which a surface normal to an original sheet surface is at an angle of less than 30 degrees to the machine axis; and
further connectors of a second type wherein the at least one bridge section is displaced in a radial direction, outwards of a volume in which the first end connectors are arranged, wherein the further connectors of the second type comprise:
a first section forming a connection to a first shaped strand,
a second section and third section that, starting at the first section, run along a circumferential direction and outwards in the radial direction to
a fourth section, constituting the bridge section, and from the bridge section run back along the circumferential direction and inwards in the radial direction to a seventh section forming a connection to a second shaped strand.