STATOR PACK AND METHOD FOR MANUFACTURING A STATOR PACK

Description

[0001] The invention relates to a method for producing a stator core having a base element which is completely closed in the circumferential direction and has a plurality of stator teeth, wherein at least one coil is wound onto each stator tooth (P), wherein all coils are wound with the same continuous winding wire and wherein, after each winding of a coil of winding wire onto one of the stator teeth, a next coil of the continuous winding wire is wound onto a next stator tooth without severing the winding wire.

[0002] The invention also relates to a method for producing a stator using such a stator core.

[0003] The invention also relates to a stator core having a base element completely closed in the circumferential direction with a plurality of stator teeth, wherein at least one coil of winding wire is wound on each stator tooth, wherein all coils are wound with the same uninterrupted winding wire.

[0004] DE 21 2006 000 034 U1 discloses a stator for an electronically commutated electric motor with a cylindrical casing and several poles made of ferromagnetic material facing inward toward the cylinder axis. The poles enclose a cylindrical cavity for accommodating a rotor. Each pole is provided with a winding with several turns of wire. The turns of the windings are wound continuously around the poles. Contacting for connecting the winding arrangement and joining the windings to form a three-phase arrangement with three winding connections is achieved via a contact ring with electrical conductors. Manufacturing such a stator is complex. Furthermore, such a stator requires a considerable amount of space.

[0005] EP 1 276 208 A2 discloses a stator for an electric motor or generator and a method for winding the stator. The method disclosed in this document aims, among other things, to achieve high space utilization. The arrangement fundamentally does not require the winding needle to be moved back and forth in the slot between the poles, but instead uses insulating inserts arranged on the axial surfaces of the poles outside the gap to guide the wire from one end to the other. In one embodiment, the insulating insert effectively changes the circumferential length of the coil winding, which decreases in an axial direction along its length.

[0006] Similar stators with regard to their basic structure are known from WO 03 / 081755 A1 and from US 2015 / 0137637 A1.

[0007] DE 10 2010 049 620 A1 discloses a stator assembly for multi-phase machines with a plurality of soft magnetic stator segments individually wound with coils that can be connected to a yoke. The coils of one phase are connected in series, with the stator segments of one phase forming a stator segment chain.

[0008] DE 10 2014 201 637 A1 discloses a method for producing a stator having a plurality of stator poles and at least one busbar for electrically connecting the ends of the windings of different stator poles. The method is characterized in that the busbar is formed in several parts and has a plurality of holding parts, to each of which at least one winding wire can be fixed, and a connecting part for electrically connecting the holding parts. Before a winding process, the holding parts are first arranged on a carrier component, and then the winding process takes place, during which at least one winding wire is wound onto stator teeth and fixed to the holding parts. After the winding process, the busbar is assembled by electrically connecting the holding parts using the connecting part.DE 10 2014 201 637 A1 also discloses a busbar for a stator and a stator, as well as an electric motor with such a busbar.

[0009] DE 10 2013 201 820 A1 discloses a stator having a plurality of core configuration sections, each of which includes a plurality of yoke configuration sections that configure an annular yoke and are segmented in a circumferential direction of the yoke, and a plurality of tooth sections that protrude from the respective yoke configuration sections along a radial direction of the yoke, the tooth sections being integrated into the yoke configuration sections. Furthermore, the stator includes a plurality of coil wires wound on the respective tooth sections to configure a plurality of winding sections, a plurality of insulators, each of which includes a plurality of insulator sections integrated into each of the respective core configuration sections and forming insulation between the tooth sections and the winding sections, and a connecting section that connects the plurality of insulator sections together.

[0010] US 2012 / 0025662 A1 discloses an electric motor configured as an external rotator, including a stator and a rotor. The stator includes a stator core having a plurality of teeth, coils, and insulators that support the coils. The insulators are connected to each other in an annular configuration such that the teeth are inserted into the insulators. Each of the insulators has a base body and an outer peripheral flange. Each of the insulators further includes a contact pad on at least one of two axial ridge portions. The axial ridge portions include bonding portions between the base body and the outer peripheral flange. The contact pads each include a rotor-facing surface facing the rotor and a tooth-contacting surface.

[0011] DE 101 52 499 A1 discloses an electric motor with an inner rotor and an outer stator. The rotor has several permanent-magnetic pole pieces. The stator windings are supported by stator pole pieces, which have stator pole pieces radially inwardly facing the rotor pole pieces. The stator pole pieces are connected to the adjacent stator pole pieces via a short-circuit bar, so that all stator pole pieces are integrally formed with one another. By providing short-circuit bars between the stator pole pieces, a one-piece stator base body is available, which can be wound from the radial outside with a single continuous winding wire.

[0012] DE 20 2009 011 270 U1 discloses an end cap device for a winding core of an electrical machine, in particular for a stator core of an electrical machine. It is proposed to design an end cap device for a winding core of an electrical machine, in particular for a stator core of an electrical machine, which has at least one winding receiving area with at least one base area and at least two laterally arranged boundary walls, as well as at least one cable holder device for holding an electrical conductor in at least one cable guide area, wherein at least one through-hole is provided between the winding receiving area and the cable guide area of the cable holder device, such that the through-hole is arranged within the length of the base area of the winding receiving area.With the help of the end cap device it is possible to wind the electrical conductor in a defined area.

[0013] DE 10 2015 208 210 A1 discloses an electronically commutated DC motor with an internal rotor and a three-phase stator, which comprises a closed yoke ring, a plurality of inwardly directed stator poles integral with the yoke ring, and an insulating body that axially covers the stator poles with pole covers and the yoke ring with a yoke ring cover. The insulating body has wire guide means that project axially parallel from the yoke ring cover and are interrupted by wire bushings. At least three adjacent wire deflection means are provided that project axially parallel from the yoke ring cover and are separated from one another by cutouts.

[0014] DE 20 2009 000 415 U1 discloses an electronically commutated motor with a rotor and a stator arrangement in which a number of salient stator poles divisible by three or an integer multiple thereof is provided. Coils are associated with each pole, which are arranged vertically for electrical connection and are arranged in an insulating part. The poles are insulated from each other and nested within each other.

[0015] FR 3 004 867 A1 discloses an insulating element for holding winding wires for a stator of an electrical machine. The insulating element comprises an annular support with an inner contact surface that can be pressed against a radial end face of the stator, as well as hooks for the winding wire. The winding wire sections intersect in the spaces between the stator teeth and are not exclusively parallel to one another.

[0016] It is the object of the present invention to provide a method for producing a stator core which enables the achievement of a particularly high fill factor.

[0017] The object is achieved by a method which is characterized in that the winding of the stator teeth is carried out in such a way that the winding wire sections of the winding wire run exclusively parallel in the installation spaces between the stator teeth and intersections of winding wire sections are arranged exclusively outside the installation spaces between the stator teeth.

[0018] It is a further object of the present invention to provide a stator package that can have a particularly high fill factor.

[0019] The further object is achieved by a stator package which is characterized in that winding wire sections of the winding wire run exclusively parallel to one another in the spaces between the stator teeth and intersections of winding wire sections are arranged exclusively outside the spaces between the stator teeth.

[0020] The invention has the very special advantage that the installation space between two adjacent stator teeth can be particularly well filled with a large number of winding wire sections, leaving only a small amount of free space. This can be particularly advantageously exploited because the invention allows the use of a particularly thin winding wire, which is explained in detail below.

[0021] According to the invention, it was recognized that in the stators known from the prior art, such as the stator known from the above-mentioned document EP 1 276 208 A2, installation space in the spaces between the stator teeth disadvantageously remains unused. In particular, according to the invention, it was recognized that an even higher fill factor is prevented by laying the winding wire in such a way that it crosses itself there.

[0022] The stator core according to the invention, particularly due to its particularly high fill factor, enables an electric motor equipped with it to exhibit good efficiency and good thermal behavior. In particular, the electric motor can be designed more compactly than conventional electric motors while maintaining the same performance.

[0023] Preferably, the winding wire is wound onto the stator teeth using a needle winder. The deflection supports located outside the installation space between two adjacent stator teeth have the particular advantage that the winding wire can be guided in such a way that the action and movement options of the winding needle, particularly in the area between adjacent stator poles, are only slightly restricted. After winding each coil, the winding wire is completely guided out of the installation space between adjacent stator poles and around a deflection support located outside the installation space between two adjacent stator teeth before winding the next coil begins.

[0024] Preferably, the deflection supports are also arranged outside the spaces that axially adjoin the installation space located between adjacent stator poles. Alternatively or additionally, it can advantageously be provided that the deflection supports are also arranged outside the spaces that radially adjoin the installation space located between adjacent stator poles, either directly or separated by a wall.

[0025] As already mentioned, it is particularly advantageous if, after each winding of a coil, a nozzle of the winding needle is guided completely out of the installation space between the stator tooth just wound and the next stator tooth and around the deflection support arranged outside the installation space before it is reinserted into an installation space between two stator teeth for winding a next coil onto a next stator tooth.

[0026] In this case, for example, it is possible that after winding a coil, the winding needle is guided completely out of the installation space between the currently wound stator tooth and the next, adjacent stator tooth and around the deflection support arranged outside the installation space, and is then inserted again into the same installation space between the currently wound stator tooth and the next stator tooth in order to wind the next coil onto the next stator tooth. Alternatively, it is also possible that after winding a coil, the winding needle is guided completely out of the installation space between the currently wound stator tooth and the next, adjacent stator tooth and around the deflection support arranged outside the installation space, and is then inserted into the next installation space between the next stator tooth and the stator tooth after that in order to wind the next coil onto the next stator tooth.

[0027] With regard to the action and movement options of the winding needle, it is particularly advantageous that the stator teeth are wound in such a way that the winding wire runs exclusively parallel in the spaces between the stator teeth and / or that the stator teeth are wound in such a way that intersections of winding wire sections are arranged exclusively outside the installation spaces between the stator teeth. In addition, it can also advantageously be provided that intersections of winding wire sections are arranged exclusively outside the spaces that axially adjoin the installation space located between adjacent stator poles and / or that intersections of winding wire sections are arranged exclusively outside the spaces that radially adjoin the installation space located between adjacent stator poles.It is advantageous to avoid two winding wire sections in the installation space between two stator teeth having an angle to each other that is different from zero degrees or from 180 degrees in the projection.

[0028] In a particularly advantageous embodiment of the method according to the invention, several coils are wound on at least one stator tooth. In particular, it can advantageously be provided that several coils are wound on each of the stator teeth.

[0029] In particular, the coils wound on a stator tooth can later be connected in parallel. With regard to the effect during operation of an electric motor, there are no significant differences between a coil with x turns wound with a thicker winding wire and, for example, three coils connected in parallel, each also having x turns and wound with a winding wire three times thinner. However, a higher fill factor can be achieved by using a thinner winding wire. The main reason for this is that a thicker winding wire generally also requires a thicker and therefore more stable winding needle, which takes up a larger part of the area between adjacent stator teeth during winding. It has also been recognized that thick winding wires are difficult to insert into narrow spaces.

[0030] It is possible to wind all the coils to be wound onto a stator tooth (and later connected in parallel) directly one after the other. However, it has been shown that, particularly with regard to automated contacting of the individual coils, it is particularly advantageous to proceed in such a way that at least one other stator tooth is wound with at least one coil between the winding of two coils onto a stator tooth.

[0031] In a particularly advantageous embodiment, the stator teeth are first wound with a first coil each, wherein the winding wire is guided from the first coil of a stator tooth to the first coil of the next stator tooth around at least one first deflection support arranged outside the installation space between two adjacent stator teeth. Subsequently, the stator teeth are each wound with a second coil, wherein the winding wire is guided from the second coil of a stator tooth to the second coil of the next stator tooth around a second deflection support, different from the first deflection support, arranged outside the installation space between two adjacent stator teeth.

[0032] With regard to orderly and space-saving winding wire guidance, it is particularly advantageous if the first deflection supports are axially spaced from the second deflection supports. Alternatively or additionally, the first deflection supports and the second deflection supports can also be arranged in different, axially spaced planes.

[0033] Alternatively, however, it is also possible—instead of or in addition—for the winding wire to be placed around the same (first) deflection supports between the winding of two second coils, as was done previously when winding the first coils. For this purpose, the deflection supports should be sufficiently long in the axial direction so that the individual winding wire sections can be held axially adjacent to one another by the deflection support.

[0034] In particular, it can advantageously be additionally provided that the stator teeth are wound with a third coil each after the second coils have been wound, wherein the winding wire is guided from the third coil of a stator tooth to the third coil of the next stator tooth around a third deflection support each, which is different from the first and the second deflection support and which is arranged outside the installation space located between two adjacent stator teeth.

[0035] In this regard, it is also possible for the first and / or second deflection supports to be axially spaced from the third deflection supports and / or for the first and / or second deflection supports and the third deflection supports to be arranged in different, axially spaced-apart planes. However, it is also not excluded to use deflection supports around which a winding wire section has already been previously laid instead or in addition.

[0036] When manufacturing a stator, particularly with regard to fully automated production, it is advantageous to first produce a stator package using a method according to the invention and then to separate the uninterrupted winding wire at several points and interconnect several coils in each case.

[0037] In particular, it can advantageously be provided that in the same processing step, in particular using busbars, both the plurality of coils wound on a stator tooth are connected in parallel to one another to form a respective coil system, and a star connection of the coil systems is carried out. In particular for this purpose, a plurality of mutually insulated busbars having hooked lugs can be placed on the front side of the starter pack in such a way that the hooked lugs engage around sections of the winding wire, preferably each running outside the installation space between two adjacent stator teeth. The hooked lugs can then be welded to the engaged sections of the winding wire. Preferably, during this processing step, the previously uninterrupted winding wire is then severed at the points required for the desired electrical circuit (e.g., a star connection).

[0038] In a particularly advantageous embodiment, which enables a particularly high fill factor, the stator teeth are stepped. In particular, it can advantageously be provided that the stator teeth are stepped in the radial direction or that the stator teeth have sections of different circumferences. In a special embodiment, the stator teeth have sections of different circumferences, with the radially inner sections having a larger diameter than the radially outer sections.

[0039] A stator manufactured using a stator package according to the invention can be particularly compact compared to a conventional stator of the same performance; this applies both to the axial and the radial dimensions.

[0040] In a special design, the stator has several, in particular exactly four, busbars with hooked lugs on its end face. The hooked lugs each engage around sections of the winding wire, preferably extending outside the installation space between two adjacent stator teeth, and are electrically connected, in particular welded, to these sections. A particularly compact design is one in which the busbars are arranged at least partially one above the other in the axial direction.

[0041] Particularly advantageous, particularly with regard to compact design, is an electric motor that includes a stator according to the invention. The electric motor can, for example, be a three-phase electric motor with a star connection. For example, the electric motor can have a stator according to the invention with 12 stator teeth and a rotor with 10 or 14 magnets.

[0042] Of particular advantage, according to an independent inventive concept, is a method according to the preamble of claim 1, which does not have the features of the characterizing part of claim 1 or which, instead of the characterizing part of claim 1, has at least one feature of one of the dependent claims. Likewise, according to an independent inventive concept, a stator core (and an electric motor produced therewith) according to the preamble of claim 7 is of particular advantage in that it does not have the features of the characterizing part of claim 7 or which, instead of the characterizing part of claim 7, has at least one feature of one of the dependent claims.

[0043] The subject matter of the invention is illustrated schematically and by way of example in the drawing and is described below with reference to the figures, wherein identical or similarly acting elements are generally provided with the same reference numerals even in different embodiments. In the drawings: Fig. 1 shows a stator core according to the invention in a plan view when viewed in the axial direction, Fig. 2 shows a detailed view of the stator core according to the invention, Fig. 3 shows a further detailed view of the starter core according to the invention, Fig. 4 shows a first part of a base element, Fig. 5 shows a second part of the base element, Fig. 6 shows a detailed view of the base element, Fig. 7 shows a schematic representation to illustrate the winding wire path, Fig. 8 shows a schematic representation to illustrate the winding wire path when winding first coils onto the stator teeth, Fig. 9 shows a schematic representation to illustrate the winding wire path when winding second coils onto the stator teeth, Fig. 10 shows a schematic representation to illustrate the connection contact, Fig. 11 shows a cross-sectional representation of a coil wound with a thick winding wire, Fig. 12 shows a cross-sectional representation of several coils connected in parallel and wound with a thin winding wire, Fig.Fig. 13 an arrangement of busbars with hook lugs, Fig. 14 an illustration of the contacting of the winding wire sections in the area of the hook lugs, Fig. 15 a first busbar, Fig. 16 a second busbar, Fig. 17 a third busbar, Fig. 18 a fourth busbar, Fig. 19 a covering device for covering the busbars, Fig. 20 the busbars covered with the covering device, Fig. 21 a schematic representation to illustrate the winding wire path when winding first coils onto the stator teeth, Fig. 22 a schematic representation to illustrate the winding wire path when winding second and third coils onto the stator teeth, Fig. 23 a schematic representation to illustrate the contacting of the coils, Fig. 24 schematic representation of the circuitry of the coil systems in a star circuit, Fig. 25 a schematic illustration of the circuitry of the coil systems wound onto the individual stator teeth.

[0044] Fig. 1shows a stator package 1, which has 12 stator teeth P, each with a first coil 3, a second coil 4 and a third coil 5 made of winding wire 2, wherein all coils 3, 4, 5 are wound with the same, uninterrupted winding wire 2. It can be seen that the winding wire 2 does not run directly from one stator tooth P to the next stator tooth P. Rather, the winding wire 2 is laid around at least one deflection support ST, which is arranged outside the installation space 14 located between two adjacent stator teeth P. This is particularly evident in the detailed views of the Figures 3 and 4 to recognize.

[0045] The stator package 1 has a basic element which is composed of two parts. Figure 4 shows a first part 6 of a basic element. Figure 5shows a second part 7 of a base element. The base element includes, in particular, the stator teeth P, onto which the winding wire 2 is wound. Furthermore, the first part 6 of the base element includes the deflection supports ST. The first part 6 of the base element includes a first retaining ring 8, on which the deflection supports ST are formed and which supports first halves of the stator teeth P. The second part 7 of the base element includes a second retaining ring 9, which supports second halves of the stator teeth P.

[0046] Both the first part 6 of the base element and the second part 7 of the base element can advantageously be manufactured as plastic injection-molded parts.

[0047] The stator teeth P are stepped and have grooves for inserting the winding wire 2, which is particularly Figure 6 shows.

[0048] Figure 8shows a schematic representation to illustrate the winding wire path when winding first coils 3 onto the stator teeth P1-P12. After each winding of a first coil 3 made of winding wire 2 onto one of the stator teeth P1-P12 without severing the winding wire 2, a next first coil 3 made of the uninterrupted winding wire 2 is wound onto a next stator tooth P1-P12, wherein the winding wire 2 is not guided directly from one stator tooth P1-P12 to the next. Rather, the winding wire 2 is guided around at least one deflection support ST1-ST18, which is arranged outside the installation space 14 located between two adjacent stator teeth P1-P12.

[0049] After winding the first coils 3, second coils 4 can be wound on the same stator teeth P1-P12, which results in Figure 9 is illustrated. In this example, the winding wire 2 is guided around the same deflection supports ST1-ST18 as when winding the first coils 3.

[0050] Figure 10 shows a schematic diagram illustrating the connection contact. It can be seen that different winding wire sections are contacted in the area between two deflection supports ST1-ST18 and are connected to each other by means of additional conductors, for example, by means of busbars 10, 11, 12, 13. Some winding wire sections are connected in such a way that they form a star point S. Other winding wire sections are connected to each other to form three phases, U, V, W. Subsequently, the winding wire 2 is separated at several points, which is shown in the Figure 10 is not shown.

[0051] The coils 3, 4, 5, each wound on a stator tooth P, are connected in parallel. With regard to the effect during operation of an electric motor, there are no significant differences between one coil 3, 4, 5 with x turns, wound with a thicker winding wire 2, and, for example, four coils 3, 4, 5 connected in parallel, each also having x turns and wound with a winding wire 2 four times thinner. However, when using a thinner winding wire 2, a fill factor that is more than half higher can be achieved, which Figures 11 and 12 illustrate. In practice, fill factors of up to 50% and more can be achieved. A fill factor of 100% would mean that the entire installation space 14 between the stator teeth ST would be completely filled with an electrical conductor, for example, copper.

[0052] To produce a stator, several mutually insulated busbars 10, 11, 12, 13, which have hook lugs 15, are placed on the front side of the stator package 1. Figure 13 shows such an arrangement of busbars 10, 11, 12, 13 with hooked lugs 15. The busbars 10, 11, 12, 13 are designed and arranged in such a way that the hooked lugs 15 each encompass sections of the winding wire 2 extending outside the installation space 14 located between two adjacent stator teeth P, which in Figure 14 The busbars 10, 11, 12, 13 have contact sections 17 for attaching an electrical connector. The hooked lugs 15 can then be welded to the encompassed sections of the winding wire 2. It is particularly advantageous if an electrical connection to the winding wire 2 is also established in the lower region of the hooked lugs 15, for example, by welding. Figures 15 to 18show separate representations of the busbars 10, 11, 12, 13.

[0053] Figure 19 shows a covering device 16 for covering the busbars 10, 11, 12, 13. Figure 20 shows the busbars 10, 11, 12, 13 covered with the covering device 16.

[0054] Figure 21shows a schematic representation to illustrate the winding wire path when winding first coils 3 onto the stator teeth P1 to P12. After each winding of a first coil 3 of winding wire 2 onto one of the stator teeth P1-P12 without severing the winding wire 2, a next first coil 3 of the uninterrupted winding wire 2 is wound onto a next stator tooth P1-P12, wherein the winding wire 2 is not guided directly from one stator tooth P1-P12 to the next. Rather, the winding wire 2 is guided around at least one deflection support ST1-ST18, which is arranged outside the installation space 14 located between two adjacent stator teeth P1-P12. Subsequently, second coils 4 and third coils 5 are wound onto the stator teeth P1 to P12, which in Figure 22 is illustrated.

[0055] The coils 3, 4, 5 wound on a stator tooth P1-P12 are connected in parallel to each other to form a coil system. This occurs when contacting the busbars 10, 11, 12, 13. At the same time, the connection is made such that three phases U, V, W are formed, and the winding wire 2 is separated at the points indicated in the Figure 23 by a cross. This is such that the coil systems 18 are arranged according to the Figure 24 shown circuit arrangement of a star connection.

[0056] Figure 25 shows a stator with a rotor. Two adjacent coils are connected in series to form a pole pair. Opposite pole pairs belong to the same phase and are connected according to the Figure 24 shown circuit arrangement connected in parallel to each other. List of reference symbols:

[0057] 1Stator package 2Winding wire 3First coils 4Second coils 5Third coils 6First part 6 of a base element 7Second part 6 of a base element 8First retaining ring 9Second retaining ring 10Busbar 11Busbar 12Busbar 13Busbar 14Installation space between adjacent stator teeth 15 STHook lugs 16Cover device 17Contact sections 18Coil systems STDeflection supports PStator teeth SSStar point U, V, WPhases

Claims

1. Method for producing a stator assembly (1) having a main element which is completely closed in a circumferential direction and has multiple stator teeth (P), wherein at least one coil is wound onto each stator tooth (P), wherein all the coils are wound using the same uninterrupted winding wire, and wherein, in each case after the winding of a coil composed of winding wire (2) onto one of the stator teeth (P), without severing the winding wire (2), the next coil composed of the uninterrupted winding wire (2) is wound onto the next stator tooth, wherein the winding wire is in each case not led directly from one stator tooth to the next, but is in each case led around at least one deflection support of the main element, said deflection support being arranged outside the structural space (14) situated between two adjacent stator teeth (P), characterized in that the winding of the stator teeth (P) is realized in such a way that the winding-wire portions of the winding wire (2) in the structural spaces between the stator teeth (P) run exclusively parallel to one another and crossings of winding-wire portions are arranged exclusively outside the structural spaces between the stator teeth (P).

2. Method according to Claim 1, characterized in that a. the winding wire (2) is wound onto the stator teeth (P) by means of a needle winder, or in that b. the winding wire (2) is wound onto the stator teeth (P) by means of a needle winder, wherein, in each case after the winding of a coil, a nozzle of the winding needle is led all the way out of the structural space (14) between the stator tooth that has just been wound and the next stator tooth and around the deflection support arranged outside the structural space (14) before being introduced into a structural space (14) between two stator teeth (P) again for the purpose of winding the next coil onto the next stator tooth.

3. Method according to Claim 1 or 2, characterized in that the winding of the stator teeth (P) is realized in such a way that a. crossings are arranged exclusively outside the spaces which axially adjoin the structural space (14) situated between adjacent stator poles, and / or in that b. crossings are arranged exclusively outside the spaces which radially adjoin the structural space (14) situated between adjacent stator poles.

4. Method according to one of Claims 1 to 3, characterized in that a. multiple coils are wound onto at least one stator tooth, or in that in each case multiple coils are wound onto all the stator teeth (P), or in that b. multiple coils are wound onto at least one stator tooth, or in that in each case multiple coils are wound onto all the stator teeth (P), wherein, chronologically between the winding of two coils onto a stator tooth, at least one other stator tooth has at least one coil wound onto it, or in that c. multiple coils are wound onto at least one stator tooth, or in that in each case multiple coils are wound onto all the stator teeth (P), wherein, chronologically between the winding of two coils onto a stator tooth, at least one other stator tooth has at least one coil wound onto it, and the stator teeth (P) firstly have in each case one first coil wound onto them, wherein the winding wire (2) is in each case led from the first coil of a stator tooth to the first coil of the next stator tooth around in each case at least one first deflection support, which is arranged outside the structural space (14) situated between two adjacent stator teeth (P), and wherein the stator teeth (P) subsequently have in each case one second coil wound onto them, wherein the winding wire (2) is in each case led from the second coil of a stator tooth to the second coil of the next stator tooth around in each case at least one second deflection support, which is different from the first deflection support and is arranged outside the structural space (14) situated between two adjacent stator teeth (P), or in that d. multiple coils are wound onto at least one stator tooth, or in that in each case multiple coils are wound onto all the stator teeth (P), wherein, chronologically between the winding of two coils onto a stator tooth, at least one other stator tooth has at least one coil wound onto it, and the stator teeth (P) firstly have in each case one first coil wound onto them, wherein the winding wire (2) is in each case led from the first coil of a stator tooth to the first coil of the next stator tooth around in each case at least one first deflection support, which is arranged outside the structural space (14) situated between two adjacent stator teeth (P), and wherein the stator teeth (P) subsequently have in each case one second coil wound onto them, and the winding wire (2) is in each case led from the second coil of a stator tooth to the second coil of the next stator tooth around in each case at least one second deflection support, which is different from the first deflection support and is arranged outside the structural space (14) situated between two adjacent stator teeth (P), and wherein the first deflection supports (ST) are spaced apart axially from the second deflection supports (ST), and / or in that the first deflection supports (ST) and the second deflection supports (ST) are arranged in different planes that are spaced apart axially from one another, or in that e. multiple coils are wound onto at least one stator tooth, or in that in each case multiple coils are wound onto all the stator teeth (P), wherein, chronologically between the winding of two coils onto a stator tooth, at least one other stator tooth has at least one coil wound onto it, wherein the stator teeth (P) firstly have in each case one first coil wound onto them, wherein the winding wire (2) is in each case led from the first coil of a stator tooth to the first coil of the next stator tooth around in each case at least one first deflection support, which is arranged outside the structural space (14) situated between two adjacent stator teeth (P), and wherein the stator teeth (P) subsequently have in each case one second coil wound onto them, and the winding wire (2) is in each case led from the second coil of a stator tooth to the second coil of the next stator tooth around in each case at least one second deflection support, which is different from the first deflection support and is arranged outside the structural space (14) situated between two adjacent stator teeth (P), wherein the first deflection supports (ST) are spaced apart axially from the second deflection supports (ST), and / or wherein the first deflection supports (ST) and the second deflection supports (ST) are arranged in different planes that are spaced apart axially from one another, and wherein, after the winding of the second coils (4), the stator teeth (P) have in each case one third coil wound onto them, and wherein the winding wire (2) is in each case led from the third coil of a stator tooth to the third coil of the next stator tooth around in each case one third deflection support, which is different from the first and second deflection supports and is arranged outside the structural space (14) situated between two adjacent stator teeth (P), or in that f. multiple coils are wound onto at least one stator tooth, or in that in each case multiple coils are wound onto all the stator teeth (P), wherein, chronologically between the winding of two coils onto a stator tooth, at least one other stator tooth has at least one coil wound onto it, wherein the stator teeth (P) firstly have in each case one first coil wound onto them, wherein the winding wire (2) is in each case led from the first coil of a stator tooth to the first coil of the next stator tooth around in each case at least one first deflection support, which is arranged outside the structural space (14) situated between two adjacent stator teeth (P), and wherein the stator teeth (P) subsequently have in each case one second coil wound onto them, wherein the winding wire (2) is in each case led from the second coil of a stator tooth to the second coil of the next stator tooth around in each case at least one second deflection support, which is different from the first deflection support and is arranged outside the structural space (14) situated between two adjacent stator teeth (P), wherein the first deflection supports (ST) are spaced apart axially from the second deflection supports (ST), and / or in that the first deflection supports (ST) and the second deflection supports (ST) are arranged in different planes that are spaced apart axially from one another, and wherein, after the winding of the second coils (4), the stator teeth (P) have in each case one third coil wound onto them, and wherein the winding wire (2) is in each case led from the third coil of a stator tooth to the third coil of the next stator tooth around in each case one third deflection support, which is different from the first and second deflection supports and is arranged outside the structural space (14) situated between two adjacent stator teeth (P), and wherein the first and / or second deflection supports (ST) are spaced apart axially from the third deflection supports (ST), and / or in that the first and / or second deflection supports (ST) and the third deflection supports (ST) are arranged in different planes that are spaced apart axially from one another.

5. Method for producing a stator, characterized in that firstly a stator assembly (1) is produced using a method according to one of Claims 1 to 4, and in that subsequently the uninterrupted winding wire (2) is cut at multiple locations and in each case multiple coils are interconnected with one another.

6. Method according to Claim 5, characterized in that a. the coils wound in each case onto a stator tooth are, for the purpose of forming a coil system, connected in parallel with one another, and / or in that, b. in that in the same processing step, both in each case multiple coils wound onto a stator tooth are, for the purpose of forming in each case a coil system, connected in parallel with one another and a star connection of the coil systems (18) is realized, and / or in that, c. at an end face, multiple busbars (10, 11, 12, 13) with hook-type lugs (15) are mounted onto the stator assembly (1) in such a way that the hook-type lugs (15) engage, in particular in each case in a manner running outside the structural space (14) situated between two adjacent stator teeth (P), around portions of the winding wire (2), and / or in that, d. at an end face, multiple busbars (10, 11, 12, 13) with hook-type lugs (15) are mounted onto the stator assembly (1) in such a way that the hook-type lugs (15) engage, in particular in each case in a manner running outside the structural space (14) situated between two adjacent stator teeth (P), around portions of the winding wire (2), and the hook-type lugs (15) are welded to the portions of the winding wire (2).

7. Stator assembly (1) having a main element which is completely closed in a circumferential direction and has multiple stator teeth (P), wherein at least one coil composed of winding wire (2) is wound onto each stator tooth (P), wherein all the coils are wound using the same uninterrupted winding wire, wherein the winding wire (2) in each case does not run directly from one stator tooth to the next, but is in each case placed around at least one deflection support of the main element, said deflection support being arranged outside the structural space (14) situated between two adjacent stator teeth (P), characterized in that the winding-wire portions of the winding wire (2) in the spaces between the stator teeth (P) run exclusively parallel to one another, and in that crossings of winding-wire portions are arranged exclusively outside the spaces between the stator teeth (P).

8. Stator assembly (1) according to Claim 7, characterized in that a. crossings are arranged exclusively outside the spaces which axially adjoin the structural space (14) situated between adjacent stator poles, and / or in that b. crossings are arranged exclusively outside the spaces which radially adjoin the structural space (14) situated between adjacent stator poles.

9. Stator assembly (1) according to Claim 8, characterized in that a. multiple coils are wound onto at least one stator tooth, or in that multiple coils are wound onto all the stator teeth (P), or in that b. in each case one first coil and one second coil are wound onto each stator tooth, and in that, on its way from a first coil of a stator tooth to the first coil of the adjacent stator tooth, the winding wire (2) is placed around at least one first deflection support, which is arranged outside the structural space (14) situated between the adjacent stator teeth (P), and in that, on its way from a second coil of a stator tooth to the second coil of the adjacent stator tooth, the winding wire (2) is placed around at least one second deflection support, which is different from the first deflection support and is arranged outside the structural space (14) situated between the adjacent stator teeth (P), or in that c. in each case one first coil and one second coil are wound onto each stator tooth, and in that, on its way from a first coil of a stator tooth to the first coil of the adjacent stator tooth, the winding wire (2) is placed around at least one first deflection support, which is arranged outside the structural space (14) situated between the adjacent stator teeth (P), and in that, on its way from a second coil of a stator tooth to the second coil of the adjacent stator tooth, the winding wire (2) is placed around at least one second deflection support, which is different from the first deflection support and is arranged outside the structural space (14) situated between the adjacent stator teeth (P), wherein the first deflection supports (ST) are spaced apart axially from the second deflection supports (ST), and / or in that the first deflection supports (ST) and the second deflection supports (ST) are arranged in different planes that are spaced apart axially from one another, or in that d. in each case one first coil and one second coil are wound onto each stator tooth, and in that, on its way from a first coil of a stator tooth to the first coil of the adjacent stator tooth, the winding wire (2) is placed around at least one first deflection support, which is arranged outside the structural space (14) situated between the adjacent stator teeth (P), and in that, on its way from a second coil of a stator tooth to the second coil of the adjacent stator tooth, the winding wire (2) is placed around at least one second deflection support, which is different from the first deflection support and is arranged outside the structural space (14) situated between the adjacent stator teeth (P), wherein the first deflection supports (ST) are spaced apart axially from the second deflection supports (ST), and / or in that the first deflection supports (ST) and the second deflection supports (ST) are arranged in different planes that are spaced apart axially from one another, and in each case one third coil is wound onto each stator tooth and, on its way from a third coil of a stator tooth to the third coil of the adjacent stator tooth, the winding wire (2) is placed around a third deflection support, which is arranged outside the structural space (14) situated between the adjacent stator teeth (P), or in that e. in each case one first coil and one second coil are wound onto each stator tooth, and in that, on its way from a first coil of a stator tooth to the first coil of the adjacent stator tooth, the winding wire (2) is placed around at least one first deflection support, which is arranged outside the structural space (14) situated between the adjacent stator teeth (P), and in that, on its way from a second coil of a stator tooth to the second coil of the adjacent stator tooth, the winding wire (2) is placed around at least one second deflection support, which is different from the first deflection support and is arranged outside the structural space (14) situated between the adjacent stator teeth (P), wherein the first deflection supports (ST) are spaced apart axially from the second deflection supports (ST), and / or in that the first deflection supports (ST) and the second deflection supports (ST) are arranged in different planes that are spaced apart axially from one another, and in each case one third coil is wound onto each stator tooth and, on its way from a third coil of a stator tooth to the third coil of the adjacent stator tooth, the winding wire (2) is placed around a third deflection support, which is arranged outside the structural space (14) situated between the adjacent stator teeth (P), and the first and / or second deflection supports are spaced apart axially from the third deflection supports (ST), and / or in that the first and / or second deflection supports (ST) and the third deflection supports (ST) are arranged in different planes that are spaced apart axially from one another.

10. Stator assembly (1) according to Claim 8 or 9, characterized in that a. the stator teeth (P) are of stepped form, or in that b. the stator teeth (P) are formed so as to be stepped in a radial direction, or in that c. the stator teeth (P) have portions of different extents, or in that d. the stator teeth (P) have portions of different extents, wherein the portions situated radially further inwards have a greater diameter than the portions situated radially further outwards.

11. Stator produced using a stator assembly (1) according to one of Claims 8 to 10.

12. Stator according to Claim 11, characterized in that, a. at an end face, the stator has multiple, in particular exactly four, busbars (10, 11, 12, 13) with hook-type lugs (15), wherein the hook-type lugs (15) engage, in particular in each case in a manner running outside the structural space (14) situated between two adjacent stator teeth (P), around portions of the winding wire (2) and are connected, in particular welded, thereto in an electrically conductive manner, or in that, b. at an end face, the stator has multiple, in particular exactly four, busbars (10, 11, 12, 13) with hook-type lugs (15), wherein the hook-type lugs (15) engage, in particular in each case in a manner running outside the structural space (14) situated between two adjacent stator teeth (P), around portions of the winding wire (2) and are connected, in particular welded, thereto in an electrically conductive manner, wherein the busbars 10, 11, 12, 13 are arranged so as to be at least partially one above the other in an axial direction.

13. Stator according to Claim 11 or 12, characterized in that a. the coils in each case wound onto a stator tooth are connected in parallel with one another, and / or in that b. multiple coils are interconnected with one another in a star connection, or in that multiple overall coils are interconnected with one another in a star connection.

14. Electric motor containing a stator according to one of Claims 11 to 13.

15. Electric motor according to Claim 14, characterized in that a. the electric motor is a three-phase electric motor with a star connection, and / or in that b. the stator has 12 stator teeth (P), and / or in that the rotor has 10 or 14 magnets.