Method for producing a single- or multi-layer coil, layer coil, electric machine, and device

1 . A method for producing a single or multiple layer coil, the method comprising the steps of:

providing a flat wire;

deforming the flat wire along a deforming direction in order to produce one or more winding sections configured to be offset in relation to a starting section of the flat wire, wherein the winding section or sections are designed to form coil layers which run in winding planes arranged in an offset manner relative to the deforming direction;

arranging the flat wire in a deforming tool in order to produce S-shaped deforming regions; and

winding the winding section or sections within the respective winding plane to form one or more coil layers;

wherein a first S-shaped deforming region of the S-shaped deforming regions between the starting section and a first winding plane of the winding planes has a different form than second S-shaped deforming regions of the S-shaped deforming regions between the winding planes.

2 . The method according to claim 1 , wherein

the flat wire has a rectangular cross section, and

the deforming direction is perpendicular to a short side of the rectangular cross section.

3 . The method according to claim 1 , further comprising the step of:

producing the winding sections before the winding of the one or more coil layers.

4 . The method according to claim 1 , further comprising the step of:

forming an end section of the coil layer in a last of, or a single one of, the winding plane.

5 . The method according to claim 1 , wherein successive coil layers are wound one after the other.

6 . The method according to claim 1 , further comprising the step of:

winding the one or more one coil layers from inside to outside.

7 . The method according to claim 1 , further comprising the step of:

arresting at least the starting section in an interlocking and/or frictionally engaging manner during the winding.

8 . The method according to claim 1 , further comprising the step of:

introducing an angle, which is adapted to a slot angle, of a stator, between the winding planes.

9 . A layer coil, comprising:

a plurality of coil layers formed from a flat wire,

wherein the plurality of coil layers include a plurality of winding sections, which are offset in relation to a coil beginning of the layer coil, and a plurality of S-shaped deforming regions,

wherein the winding sections form coil layers which run in winding planes arranged in an offset manner relative to a deforming direction of the flat wire which is oriented perpendicularly or substantially perpendicularly to the winding plane, and

wherein a first S-shaped deforming region of the S-shaped deforming regions between the coil beginning and a first winding plane of the winding planes has a different form than second S-shaped deforming regions of the S-shaped deforming regions between the winding planes.

10 . The layer coil according to claim 9 ,

wherein the coil layers are respectively kept at a distance from one another by the offset, and

wherein each offset is produced by deforming the flat wire along the deforming direction which is oriented perpendicularly or substantially perpendicularly to the winding planes of the coil layers.

11 . The layer coil according to claim 10 , wherein

a number of the coil layers are oriented at an angle in relation to one another, which angle is adapted to a slot angle.

12 . An electric machine comprising at least one of the layer coil according to claim 9 .