Method and apparatus for forming a conductor element, in particular a flat wire for a stator of an electric machine, stator for an electric machine of a vehicle, electric machine and vehicle

Abstract

Method (2000) for forming a conductor element (200), in particular a flat wire for a stator (110) of an electrical machine (105), wherein the method (2000) comprises the following steps: providing (2005) a conductor element (200) with a rotary section (410), a first forming section (500) adjoining a first side of the rotary section (410), and a second forming section (505) adjoining the rotary section (410) on a second side opposite the first side of the rotary section (410); twisting (2010) the conductor element (200) by a certain angle on an axis along a principal extension direction (440) of the rotary section (410) in order to produce a twist (420) in the rotary section (410);Machining (2015) of the conductor element (200) to obtain a first straight section (510) axially offset to the rotary section (410), wherein the first straight section (510) and the rotary section (410) are connected to each other using the first forming section (500), and to obtain a second straight section (515) axially offset to the rotary section (410), wherein the second straight section (515) and the rotary section (410) are connected to each other using the second forming section (505); and re-twisting (2020) of the rotary section (4110) by the specified angle on the axis to untwist the rotary section (410).

Description

The present invention relates to a method and an apparatus for forming a conductor element, in particular a flat wire for a stator of an electric machine, to a stator for an electric machine of a vehicle, an electric machine, an electric final drive for a vehicle and to a vehicle.Electric machines are known to include a stator and a rotor and are operated using a magnetic field. Such electric machines or also electric motors are used in a large number of fields, such as for working machines or also for vehicles, and assume a winding technique, such as laminated cores with enameled round wires, for which a needle winding technique is used, for example.The document EP 2 819 276 A2 discloses a method for producing a coil and a coil.Document WO 2015 / 111287 A1 discloses a manufacturing method for a stator winding coil.Against this background, the present invention provides an improved method and an improved apparatus for forming a conductor element, in particular a flat wire for a stator of an electric machine, an improved stator for an electric machine of a vehicle, an improved electric machine, an improved electric final drive for a vehicle and an improved vehicle according to the main claims. Advantageous embodiments are evident from the dependent claims and the following description.The approach presented makes it possible to provide a possibility for stators to use a flat-wire winding with a winding jump and thereby to avoid crossing problems within the winding. Thus, a functionality of an electric machine and, at the same time, a variability of components usable for the electric machine can be improved. This means, for example, that only a certain type of windings or coils need no longer be used for the same or improved performance for the stator.A method for forming a conductor element, in particular a flat wire for a stator of an electric machine, is presented, wherein the method comprises a step of providing a conductor element having a rotating section, a first forming section adjoining the rotating section on a first side of the rotating section and a second forming section adjoining the rotating section on a second side of the rotating section opposite the first side of the rotating section. Furthermore, the method comprises a step of twisting the conductor element by a specific angle on an axis along a main extension direction of the rotating section in order to generate a twist in the rotating section, a step of machining the conductor element in order to obtain a first straight section offset axially with respect to the rotating section, wherein the first straight section and the rotating section are connected to one another using the first forming section, and in order to obtain a second straight section offset axially with respect to the rotating section, wherein the second straight section and the rotating section are connected to one another using the second forming section, and a step of rotating the rotating section back by the specific angle on the axis in order to untwist the rotating section.The method can form a winding technique which can be advantageous for the conductor element as a flat wire. The conductor element can form, for example, an electric coil which can be arranged on a stator of an electric machine. The electric machine can be formed, for example, as an electric motor of a vehicle. The vehicle can be realized, for example, as a passenger car or as a truck, which can also be formed as an electric vehicle. The conductor element can advantageously be formed as a flat wire, which can have a rectangular cross section, for example. The winding technique described in the method advantageously makes it possible to ensure that the conductor element does not have any twists in an operational state and thus functionality of the conductor element can be improved. Thus, the rotation generated in the step of rotating can be a temporary rotation in the rotating section, which can be resolved in the step of turning back, in order to be able to generate a conductor jump back, for example. The rotation can be effected, for example, using an auxiliary tool. The method advantageously makes it possible to easily arrange the conductor element on the stator without impairing a functionality of the conductor element as a flat wire.According to one embodiment, in the step of processing, the conductor element can be processed in order to be able to convert the first straight section, the second straight section and the rotating section into a meandering shape, in particular wherein the first straight section, the second straight section and the rotating section can be arranged parallel to one another. The shape of the conductor element can also be realized, for example, as a wave-like shape. The straight line sections can be formed parallel to one another, but alternatively also obliquely to one another. As a result, a uniform arrangement of the conductor element on the stator can be advantageously achieved.The method can also comprise a step of temporarily fixing a first end of the conductor element before the step of twisting, wherein in the step of twisting the twist is generated in the rotating section arranged centrally on the conductor element. The conductor element can be fastened at the first end to a production tool, for example, so that the step of twisting can be carried out by twisting the conductor element at a second end opposite the first end.According to one embodiment, the conductor element can also be rotated in the rotation section in such a way that the rotation section can have a rotation angle of 170 degrees to 190 degrees, in particular of 180 degrees. Advantageously, it can thereby be achieved that the conductor element is effectively untwisted and thus interference factors attributable thereto can be avoided.During at least the machining, the conductor element can be machined in such a way that the first shaped section and the second shaped section can each be V-shaped. Advantageously, the two shaped sections can each be bent in a V-shape. The shaped sections can have an acute angle or alternatively also an obtuse angle, for example, wherein this can affect a length of the required conductor element. This means that a distance between the straight line sections can be dependent on the angle.Furthermore, in the step of providing, the conductor element can be provided which has at a first free end an electrical first connection point for electrically connecting the conductor element to at least one electrical component, and additionally or alternatively has at a second free end an electrical second connection point for electrically connecting the conductor element to the at least one electrical component. The electrical connection point can advantageously be shaped hairpin-like as a hairpin. Advantageously, the conductor element can be energized by means of the connection point. Both connection points can be formed, for example, as a current input or current output.The approach presented here furthermore creates a device which is designed to carry out, actuate or implement the steps of a variant of a method presented here in corresponding devices. This embodiment variant of the invention in the form of a device also enables the object on which the invention is based to be achieved quickly and efficiently.An apparatus can be an electrical device which processes electrical signals, for example sensor signals, and outputs control signals as a function thereof. The device may have one or more suitable interfaces, which may be designed as hardware and / or software. In a hardware configuration, the interfaces can be part of an integrated circuit, for example, in which functions of the device are implemented. The interfaces can also be dedicated, integrated circuits or consist at least partially of discrete components. In the case of a software configuration, the interfaces can be software modules which are present, for example, on a microcontroller in addition to other software modules.A computer program product having program code which can be stored on a machine-readable carrier such as a semiconductor memory, a hard disk memory or an optical memory and is used for carrying out the method according to one of the embodiments described above when the program is executed on a computer or a device is also advantageous.Furthermore, a stator for an electric machine of a vehicle is presented, wherein the stator has at least one conductor element which has been formed using a method in one of the aforementioned variants.The electric machine can be formed as an electric motor, which can be used, for example, for electrically driving vehicles.The conductor element can furthermore be formed as at least part of an electric coil and additionally or alternatively as at least part of a winding of the electric coil. The electric coil can advantageously be wound around the stator. The conductor element can have a winding pattern as described in the aforementioned method.According to one embodiment, the stator can have at least one further conductor element which can be formed as at least part of a further electrical coil and additionally or alternatively as at least part of a further winding of the electrical coil. The conductor element and the further conductor element can be coupled to one another and additionally or alternatively coupled. The two conductor elements can be formed in the same way, for example, and thus have the same winding pattern. Advantageously, they can be connected to one another in a materially integral manner, for example by means of laser welding or ultrasonic welding. Additionally or alternatively, the conductor elements can be realized in an electrically insulated manner. The electrical insulation can be effected, for example, by means of a cap which can be attached to at least one of the conductor elements. Furthermore, the two conductor elements can be electrically insulated from one another.Furthermore, an electric machine for a vehicle is presented, which has at least one stator in a variant mentioned above.In addition, the invention relates to an electric final drive for a vehicle having at least one electric machine. The electric final drive is characterized in that the electric machine is designed as described.In addition, the invention relates to a vehicle having an electric final drive and / or an electric machine. The motor vehicle is distinguished in that the electric final drive and / or the electric machine is designed as described.The invention is explained in more detail by way of example with reference to the appended drawings. The following are shown: FIG. 1 shows a schematic illustration of a vehicle according to an exemplary embodiment; FIG. 2 shows a schematic illustration of an exemplary embodiment of a stator for an electric machine; FIG. 3 shows a schematic plan view illustration of an exemplary embodiment of a section of a stator for an electric machine; FIG. 4 shows a schematic illustration of an exemplary embodiment of a conductor element; FIG. 5 shows a schematic illustration of an exemplary embodiment of a conductor element; FIG. 6 shows a schematic illustration of an exemplary embodiment of a conductor element; FIG. 7 shows a schematic illustration of an exemplary embodiment of a conductor element; FIG. 8 shows a schematic illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 9 shows a schematic illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 10 shows a schematic illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 11 shows a schematic illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 12 shows a schematic illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 13 shows a schematic illustration of an exemplary embodiment of an insulating element for a conductor element; FIG. 14 shows a schematic illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 15 shows a schematic illustration of an exemplary embodiment of an insulating element for a conductor element; FIG. 16 shows a schematic exploded illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 17 shows a schematic plan view illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 18 shows a schematic illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 19 shows a schematic illustration of an exemplary embodiment of a connection point of a conductor element; FIG. 20 shows a flow diagram of an exemplary embodiment of a method for forming a conductor element, in particular a flat wire for a stator of an electric machine; and FIG. 21 shows a block diagram of an apparatus according to an exemplary embodiment.In the following description of preferred exemplary embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the different figures and acting in a similar manner, wherein a repeated description of these elements is omitted.FIG. 1 shows a schematic illustration of a vehicle 100 according to an exemplary embodiment. The vehicle 100 is embodied here, for example, as a passenger car which is operated, for example, using an electric machine 105. The electric machine 105 in turn has a stator 110 and a rotor 115, which are connected to one another. In addition to the electric machine 105, the vehicle 100 has an electric final drive 120 and a power converter 125, in particular an inverter, which is arranged between the electric machine 105 and an energy supply device 130 of the vehicle 100.The stator 110 in turn has at least one conductor element which is formed as an electrical coil and / or as a winding of the electrical coil and which is described in more detail in at least one of the following figures. Each coil has, for example, a plurality of windings and thus optionally a plurality of conductor elements, which are realized or can be realized, for example, in the same way. The at least one conductor element is optionally formed as a flat wire.FIG. 2 shows a schematic illustration of an exemplary embodiment of a stator 110 for an electric machine as has been described in FIG. 1. The stator 110 has at least one conductor element 200 and in particular three similar conductor elements 200, 205, 210 which are realized as windings with the same winding pattern, as is described in more detail in FIG. 16. The conductor elements 200, 205, 210 are arranged in three rows lying one behind the other in a circular manner around an inner region 215 of the stator 110 and are coupled or couplable to one another, for example welded. Since the conductor elements 200, 205, 210 according to this exemplary embodiment are realized in the same way, only the conductor element 200 is described in the further description for the sake of simplicity. However, the description can also be applied to the further conductor elements 205, 210.The conductor element 200 accordingly has at least one connection point 220 for electrically connecting the conductor element 200 to at least one electrical component. This connection point 220 has, for example, a hairpin-like structure and is therefore also referred to as hairpin, for example. The connection point 220 is formed, for example, as an end of the conductor element 200, which can be connected to an end of the further conductor element 205 in a materially bonded manner.FIG. 3 shows a schematic plan view illustration of an exemplary embodiment of a cutout 300 of a stator for an electric machine. In the cutout 300 at least the one conductor element 200 with at least the one connection point 220 is depicted, as described for example in FIG. 2. According to this exemplary embodiment, only optionally two connection points 220, 305 of different conductor elements 200, 205 are connected to one another, for example welded.FIG. 4 shows a schematic illustration of an exemplary embodiment of a conductor element 200 as has been described, for example, in at least one of FIGS. 2 to 3. The conductor element 200 is shown in two different states 400, 405. In the first state 400, the conductor element 200 is formed in a straight line and has, merely by way of example, a marking 415 in the center and thus in a rotational section 410. The marking 415 is only shown here for the sake of illustration a rotation position at which a rotation 420 of the conductor element 200 takes place, as is shown for example in the second state 405. A connection point 220, 435 is arranged in each case at two opposite ends 425, 430. In the second state 405, the rotation 420 has taken place about a specific angle on an axis along a main direction of extent 440 of the rotation section 410.FIG. 5 shows a schematic illustration of an exemplary embodiment of a conductor element 200 as has been described, for example, in at least one of FIGS. 2, 3 to 4. Here, too, the conductor element 200 has two mutually opposite connection points 220, 435. The conductor element 200 is formed as a flat wire, which has a rectangular cross section, for example. The conductor element 200 also has the rotating section 410 here, on which the conductor element 200 is rotated. Adjoining the rotating section 410, the conductor element 200 has two shaped sections 500, 505, each of which is realized in a V-shape. According to this exemplary embodiment, a straight line section 510, 515 furthermore adjoins each of the shape sections 500, 505. The straight line sections 510, 515 are arranged here axially offset with respect to the rotational section 410, for example parallel thereto. This means that the rotating section 410, the first shaped section 500 and the first straight line section 510, and the rotating section 410, the second shaped section 505 and the second straight line section 515 each form an angular U shape. In other words, the guide element 200 is, for example, meandering or corrugated, wherein all peaks of the corrugation are formed with the same height and all valleys of the corrugation are formed with the same depth. The rotating portion 410 still has the twist 420.FIG. 6 shows a schematic illustration of an exemplary embodiment of a conductor element 200 as has been described, for example, in at least one of FIGS. 2, 3, 4 to 5. The conductor element 200 shown in FIG. 6 is shown bent only by way of example, so that the turning section 410 is formed straight and accordingly no longer has any twisting. This means that the conductor element 200 is rotated about an axis running through the rotating section 410 in such a way that the straight sections 510, 515 are at a smaller distance from one another than the rotating section 410 in each case from one of the straight sections 510, 515.An intermediate state 600 of the conductor element 200, which for example resembles the shape of the conductor element 200 described in FIG. 5, is illustrated in dashed lines according to this exemplary embodiment. In an operating state 605, the rotation in the rotating section 410 according to this exemplary embodiment is untwisted. The two states 600, 605 represent, for example, snapshot or machining states of the conductor element 200 during a molding process, as is described in more detail in FIG. 20.FIG. 7 shows a schematic illustration of an exemplary embodiment of a conductor element 200 as has been described, for example, in at least one of FIGS. 2, 3, 4, 5 to 6 and in particular in FIG. 6. According to this exemplary embodiment, the conductor element 200 is illustrated in the operating state 605 and is thus ready for use.FIG. 8 shows a schematic illustration of an exemplary embodiment of a connection point 220 of a conductor element 200, as has been described, for example, in at least one of FIGS. 2, 3, 4, 5, 6 to 7. The connection point 220 corresponds or resembles, for example, the connection point described in at least one of FIGS. 2, 3, 4 to 5 and is depicted in FIG. 8 merely by way of example. In accordance with this exemplary embodiment, the further conductor element 205, which has a further connection point 305, is arranged adjacent to the conductor element 200. The connection point 220 and the further connection point 305 are arranged next to one another and can be connected or connected to one another in a materially bonded manner only optionally. According to this exemplary embodiment, the conductor element 200 and its connection point 220 have a polygonal cross section, in particular a rectangular cross section.FIG. 9 shows a schematic illustration of an exemplary embodiment of a connection point 220 of a conductor element 200, as has been described, for example, in at least one of FIGS. 2, 3, 4, 5, 6, 7 to 8. Only the shape of the connection point 220 differs from FIG. 8 in that the connection point 220 and the conductor element 200 according to this exemplary embodiment have rounded sections or a rounded cross section.FIG. 10 shows a schematic illustration of an exemplary embodiment of a connection point 220 of a conductor element 200 which, for example, is similar to the conductor element described in at least one of FIGS. 2, 3, 4, 5, 6, 7, 8 to 9. According to this exemplary embodiment, the conductor element 200 is arranged between the further conductor element 205 and a delimiting part 1000.FIG. 11 shows a schematic illustration of an exemplary embodiment of a connection point 220 of a conductor element 200 which, for example, is similar to the conductor element described in at least one of FIGS. 2, 3, 4, 5, 6, 7, 8, 9 to 10. According to this exemplary embodiment, two conductor elements 200, 205 are connected to one another in a materially bonded manner, for example welded. The welding point 1100 is realized, for example, by ultrasonic welding or by laser welding.FIG. 12 shows a schematic illustration of an exemplary embodiment of a connection point 220 of a conductor element 200 which is similar to the conductor element described in FIG. 11, for example. According to this exemplary embodiment, the two connection points 220, 305 are arranged adjacent to one another, but are not connected to one another in a materially integral manner.FIG. 13 shows a schematic illustration of an exemplary embodiment of an insulating element 1300 for a conductor element, as has been described, for example, in at least one of FIGS. 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 to 12. The insulating element 1300 is formed, for example, as a cap, which is optionally placed on the at least one connection point. Merely optionally, the insulating element 1300 is formed in a tube-cylindrical manner with, for example, a round or oval cross section. For example, the insulating element 1300 is formed as a shrink tube, which adapts to the shape of the connection point.FIG. 14 shows a schematic illustration of an exemplary embodiment of a connection point 220 of a conductor element 200, as has been described, for example, in at least one of FIGS. 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 to 13. According to this exemplary embodiment, the conductor element 200 has a bifurcation 1400. Merely optionally, the bifurcation 1400 is arranged in the shaped section of the conductor element 200 in this case, so that the connection point 220 is shaped as a connection head.FIG. 15 shows a schematic illustration of an exemplary embodiment of an insulating element 1300 for a conductor element, as has been described, for example, in at least one of FIGS. 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 to 14. The insulating element 1300 is optionally similar to the insulating element described in FIG. 13 and, according to this exemplary embodiment, is formed in particular as a two-part cap with clips, which can be attached to the at least one connection point, as was described, for example, in FIG. 13.FIG. 16 shows a schematic exploded illustration of an exemplary embodiment of a connection point 220 of a conductor element 200, as has been described, for example, in at least one of FIGS. 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 to 14. According to this exemplary embodiment, the conductor element 200 is also realized as a flat wire which has a polygonal cross section. Likewise, according to this exemplary embodiment, a further conductor element 205 is shown with a further connection point 305, which is arranged adjacent to the conductor element 200. According to this exemplary embodiment, the connection point 220 and the further connection point 305 are realized in a semicircular manner, wherein flat side surfaces 1600, 1605 of the connection points 220, 305 are arranged facing one another. The two connection points 220, 305 thus form, for example, a round shape. Furthermore, according to this exemplary embodiment, an insulating element 1300 is illustrated, which is similar or corresponds to the insulating element described in FIG. 13, for example.FIG. 17 shows a schematic illustration of an exemplary embodiment of a connection point 220 of a conductor element 205, as was described, for example, in FIG. 16. According to this exemplary embodiment, the conductor element 200 is adjacent to the further conductor element 205, as also in FIG. 16. The insulating element 1300 is arranged at the connection points 220, 305 and surrounds them, more precisely, in order to insulate them, for example, from the outside. Here, too, the insulating element 1300 is formed in a tube-cylindrical manner.FIG. 18 shows a schematic plan view illustration of an exemplary embodiment of a connection point 220 of a conductor element 200, as has been described, for example, in FIG. 16. According to this exemplary embodiment, the design of the conductor elements 200, 205 corresponds to the conductor elements described in FIG. 16, wherein these are shown only in a representation perspective differing therefrom.FIG. 19 shows a schematic illustration of an exemplary embodiment of a connection point 220 of a conductor element 200 which, for example, is similar to the conductor element described in at least one of FIGS. 16 to 17. The connection point 220 and the further connection point 305 have only a different shape than in FIGS. 16 and 17.FIG. 20 shows a flow diagram of an exemplary embodiment of a method 2000 for forming a conductor element, as has been described or at least mentioned, for example, in at least one of FIGS. 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 to 19, in particular a flat wire for a stator of an electric machine, as has been described, for example, in FIG. 1.The method 2000 comprises a step 2005 of providing, a step 2010 of turning, a step 2015 of machining and a step 2020 of turning back. In the step 2005 of providing, a conductor element is provided which has a rotating section, a first shaped section adjoining the rotating section on a first side of the rotating section and a second shaped section adjoining the rotating section on a second side of the rotating section opposite the first side of the rotating section. For example, the conductor element has at least one electrical connection point at a free end of the first straight section and / or of the second straight section for electrically connecting the conductor element to at least one electrical component. In the step 2010 of the twisting, the conductor element is twisted by a specific angle on an axis along a main extension direction of the rotating section in order to generate a twist in the rotating section. As a result, the axis runs longitudinally through the rotating portion. This is done, for example, using a tool. The determined angle is, for example, between 170° and 190°, preferably 180°. In the processing step 2015, the conductor element is processed in such a way as to obtain a first straight line section offset axially with respect to the rotational section. Here, the first straight line portion and the rotating portion are connected to each other using the first shape portion. Furthermore, in step 2015 of the machining, a second straight line section offset axially with respect to the rotational section is obtained. The second straight line section and the rotating section are connected to one another using the second shape section. More specifically, the conductor element is transformed into a meandering shape in the processing step 2015. The first mold section and the second mold section are optionally each V-shaped, wherein a tip of the V-shape points alternately in two opposite directions. Consequently, by the V-shape of the shaped sections and the straight sections adjoining them, an alternating U-shape is realized using the rotating section, in which the straight sections according to this exemplary embodiment are aligned parallel to one another and to the rotating section. In other words, the conductor element obtains a wave-like shape in the step 2015 of machining. In the turning-back step 2020, the turning portion is turned back by the predetermined angle on the axis to untwist the turning portion and generate a recess.Merely optionally, the method additionally comprises a step 2025 of temporarily fixing a first end of the conductor element before the step 2010 of twisting, wherein in the step of twisting the twist is generated in the rotating section arranged centrally on the conductor element.In other words, a method for winding jumping or layer jumping is presented for a stator with rectangular conductors. This is also referred to as a flat wire winding, for example. As already described in at least one of FIGS. 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 to 19, the conductor element, i.e. the flat wire, has at least three parallel conductor legs and two oblique conductors to form, for example, a U-shape and / or a hairpin, or has a plurality of parallel conductor legs with slopes to form, for example, a waveform.The starting point here is a flat wire as the conductor element. In step 2005 of providing, the conductor is merely optionally cut off or provided on a wire reel, for example. In step 2010 of the turning, the wire region where the winding jump is to take place is turned by 180° with a tool, for example. For this, in the temporary fixing step 2025, the one side of the conductor member was fixed. On the other hand, the rotational movement (180°) is carried out. Thus, the wire twist arises in the middle, that is, in the rotating section. In the subsequent step 2015, the oblique bends, that is to say the shape sections and the straight, parallel conductor sections, which have been described as straight sections, are shaped. In order to produce the winding jump in the subsequent step 2020, the procedure is as follows: the conductor element with the twist is fixed, for example, on one side and bent over by 180° on the other side in the step 2020 of reverse twisting. By the 180° rotation of the conductor, the winding jump, which is also referred to as a recess, is produced. The resulting winding jump or conductor jump back lies, for example, flush above or behind a further conductor element.FIG. 21 shows a block diagram of a device 2100 according to an embodiment. The device 2100 is designed to control and / or carry out a method for forming a conductor element, in particular a flat wire, as was described in FIG. 20. The device 2100 has, for example, a provisioning unit 2105, a rotation unit 2110, a processing unit 2115 and a turning-back unit 2120. The provision unit 2105 is configured to provide a conductor element having a rotating section, a first shaped section adjoining the rotating section on a first side of the rotating section and a second shaped section adjoining the rotating section on a second side of the rotating section opposite the first side of the rotating section. The twisting unit 2110 is configured to twist the conductor element by a specific angle on an axis along a main extension direction of the rotating section in order to generate a twist in the rotating section. This is done, for example, using a tool. In addition, the rotation unit 2110 is merely optionally designed to fix the conductor element at one end before the rotation. Furthermore, the machining unit 2115 is configured to effect machining of the conductor element in order to obtain a first straight line section offset axially with respect to the rotational section. The first straight line portion and the rotating portion are connected to each other using the first shape portion. Furthermore, the machining of the conductor element is effected in order to obtain a second straight line section offset axially with respect to the rotational section. The second straight line portion and the rotating portion are connected to each other using the second shape portion, so that the conductor member has a wave-like shape. The returning unit 2120 is configured to cause the rotating portion to rotate back by the predetermined angle on the axis to untwist the rotating portion.The exemplary embodiments described and shown in the figures are chosen only by way of example. Different exemplary embodiments can be combined with one another completely or with respect to individual features. An exemplary embodiment can also be supplemented by features of a further exemplary embodiment.Furthermore, method steps according to the invention can be repeated and carried out in a sequence other than that described.If an embodiment includes an "and / or" combination between a first feature and a second feature, this can be read such that the embodiment has both the first feature and the second feature according to one embodiment and either only the first feature or only the second feature according to a further embodiment.Reference numerals denote reference numerals100 Vehicle 105 Electric machine 110 Stator 115 Rotor 120 Electric final drive 125 Power converter 130 Energy supply device 200 Conductor element 205 Further conductor element 210 Third conductor element 215 Inner region 220 Connection point 300 Cutout 305 Further connection point of the further conductor element 400 First state 405 Second state 410 Rotation section 415 Marking 420 Rotation 425 First end 430 Second end 435 Connection point 440 Main direction of extent 500 First shape section 505 Second shape section 510 First straight section 515 Second straight section 600 Intermediate state 605 Operating state 1000 Delimiting part 1100 Welding point 1300 Insulating element 1400 Bifurcation 1600 First side surface 1605 Second side surface 1900 Slope 1905 Slope 2000 Method for forming a conductor element 2005 Step of providing 2010 Step of rotating 2015 Step of machining 2020 Step of turning back 2025 Step of turning back Temporary fixing 2100 Device 2105 Supply unit 2110 Turning unit 2115 Machining unit 2120 Returning unit

Claims

Method (2000) for forming a conductor element (200), in particular a flat wire for a stator (110) of an electric machine (105), wherein the method (2000) comprises the following steps: providing (2005) a conductor element (200) having a rotating section (410), a first forming section (500) adjoining a first side of the rotating section (410) and, on a second forming section (505) adjoining the rotating section (410) and opposite the first side of the rotating section (410), twisting (2010) the conductor element (200) by a specific angle on an axis along a main direction of extension (440) of the rotating section (410) in order to generate a twist (420) in the rotating section (410); machining (2015) the conductor element (200) in order to obtain a first straight section (510) offset axially with respect to the rotating section (410), wherein the first straight section (510) and the rotating section (410) are connected to one another using the first shaped section (500), and in order to obtain a second straight section (515) offset axially with respect to the rotating section (410), wherein the second straight section (515) and the rotating section (410) are connected to one another using the second shaped section (505); and turning back (2020) the rotating section (4110) by the determined angle on the axis in order to untwist the rotating section (410).Method (2000) according to Claim 1, wherein, in the step (2015) of machining, the conductor element (200) is machined in order to convert the first straight section (510), the second straight section (515) and the rotating section (410) into a meandering shape, in particular wherein the first straight section (510), the second straight section (515) and the rotating section (410) are arranged parallel to one another.Method (2000) according to one of the preceding claims, having a step (2025) of temporarily fixing a first end (425) of the conductor element (200) before the step (2010) of twisting, wherein in the step (2010) of twisting the twist (420) is generated in the rotating section (410) arranged centrally on the conductor element (200).Method (2000) according to one of the preceding claims, wherein in the step (2010) of rotating, the conductor element (200) is rotated in the rotating section (410) in such a way that the rotating section (410) has a rotation angle of 170 degrees to 190 degrees, in particular of 180 degrees.Method (2000) according to one of the preceding claims, wherein, in the step (2015) of machining, the conductor element (200) is machined in such a way that the first shaped section (500) and the second shaped section (505) are each shaped in a V shape.Method (2000) according to one of the preceding claims, wherein in the step (2005) of providing, the conductor element (200) is provided, which has at a first free end (425) an electrical first connection point (220) for electrically connecting the conductor element (200) to at least one electrical component, and / or which has at a second free end (430) an electrical second connection point (435) for electrically connecting the conductor element (200) to the at least one electrical component.Device (2100) which is configured to execute and / or actuate the steps (2005, 2010, 2015, 2020, 2025) of the method (2000) according to one of the preceding claims in corresponding units (2105, 2110, 2115, 2120).Computer program which is configured to execute and / or actuate the steps (2005, 2010, 2015, 2020, 2025) of the method (2000) according to one of Claims 1 to 6.A machine readable storage medium having stored thereon the computer program of claim 8.Stator (110) for an electric machine (105) of a vehicle (100), wherein the stator (110) has at least one conductor element (200) which has been formed using a method (2000) according to one of Claims 1 to 6.The stator (110) according to claim 10, wherein the conductor element (200) is formed as at least a part of an electric coil and / or as at least a part of a winding of the electric coil.Stator (110) according to one of Claims 10 to 11, having at least one further conductor element (205) which is formed as at least part of a further electrical coil and / or as at least part of a further winding of the electrical coil, wherein the conductor element (200) and the further conductor element (205) can be coupled and / or are coupled to one another.Electric machine (105) for a vehicle (100), wherein the electric machine (105) comprises at least one stator (110) according to one of Claims 10 to 11.Electric final drive (120) for a vehicle (100) having at least one electric machine (105) according to Claim 13.Vehicle (100) having an electric final drive according to Claim 14 and / or an electric machine according to Claim 13 and / or a stator according to one of Claims 10 to 11.

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