Coupling unit for three-phase electric machine

Abstract

The invention relates to a coupling unit for a three-phase electric machine having at least six excitation coils, each of which has an input line and an output line. Wherein the coupling unit comprises an electrically non-conductive coupling ring having a ring axis and three retaining elements which each imitate a ring shape and which each have at least one receiving recess which is open at least on one side or can be opened at least on one side, and the coupling ring comprises three coupling wires which are respectively adapted to one of the ring shapes of the three holding assemblies and which are respectively inserted from the open side or the openable side of the at least one associated receiving pocket. The three connection lines are arranged on different connection planes when viewed in the direction of the ring axis and can each be electrically connected to an input line of an excitation coil that can be associated with one of the three phases.

Description

Technical Field

[0001] The invention relates to a connection unit for a three-phase electric machine having at least six excitation coils, each having an input terminal and each having an output terminal. Background Art

[0002] In an electric motor, the field coil must be electrically connected. To this end, the winding ends at the input and output ends of the field coil must be electrically contacted accordingly. There are many different implementations for this in the prior art. For example, the input line ends and the output line ends are individually guided to contact units respectively assigned to the connection phases (Anschlussphase) arranged at the circumference of the stator assembly. The input line is alternately connected to the three phases. Wiring is often carried out using a unit (wiring ring) that enables simple contact with an external plug or a control unit. Therefore, the unit contains all the necessary conductors and contact elements and is arranged on the end side of the stator. For this, in a star connection (Sternschaltung), all output lines are connected to each other. Other solutions use, for example, printed circuit boards, assembly units with stamped conductor tracks, overmolded units with conductor tracks, traditional cable arrangements, etc.

[0003] In the process of electrification in automotive technology, efforts are being made to find universally applicable solutions, especially for cost reasons. Summary of the invention

[0004] Starting from this, the invention is based on the object of improving the coupling unit mentioned in the introduction with regard to its structure and its costs in such a way that improved series production is possible.

[0005] According to the invention, this object is achieved by a connection unit according to claim 1. For this purpose, the connection unit has a non-conductive connection ring, the connection ring has a ring axis and three retaining components each imitating a ring shape, the retaining components each having at least one receiving recess that is open at least on one side or can be opened at least on one side, and the connection ring includes three connection wires that are respectively matched to one of the ring shapes of the three retaining components, the connection wires are respectively inserted from the open side or openable side of at least one subordinate receiving recess, wherein the three connection wires are arranged on different connection planes as seen in the direction of the ring axis and can be electrically connected to the input wires of the excitation coil that can be associated with each of the three phases.

[0006] Here, the number of excitation coils corresponds to N times the number of phases, where n corresponds to a natural number greater than 1. The connecting wire is a structure (Gebilde) that is preferably kept constant in cross-sectional shape and preferably kept constant in cross-sectional size by a wire drawing process. More preferably, no waste is produced in the case of manufacturing the connecting wire compared to stamped conductor tracks and stamped conductor guides. The cross-sectional size of the connecting wire corresponds to the number of excitation coils connected thereto, which is preferably greater than the individual cross-sectional sizes of the subordinate input line ends. Thus, cost-effective and easy-to-manufacture structural elements are used. The term connecting ring refers to a substantially completely encircling ring, wherein the annular shape can be derived from any regular and irregular polygonal shape or circular shape. It is preferably a polygonal circumferential shape, which has an angular number corresponding to the number of excitation coils. The term annular shape means at least an annular arrangement, wherein there may be gaps; the annular shape can be preset by any regular and irregular polygonal circumferential shape or circular circumferential shape, preferably a polygonal circumferential shape with an angular number corresponding to the number of excitation coils. Non-conductive means that the coupling ring has an electrically insulating non-conductive coating or an electrically insulating non-conductive sheath, or consists of a non-conductive material, preferably a plastic material.

[0007] Preferably, the coupling ring can have a window recess configured to overlap the input wire ends respectively belonging to each of the three coupling planes, so that free lateral access can be achieved not only from the inner side of the coupling ring but also from the outer side of the coupling ring, so as to place the welding tongs to weld the corresponding connection wires with the respectively belonging input wire ends. In the meaning of the present invention, the term overlap means that the position of the input wire ends is known, and the window recess is arranged so that the lateral access or gripping of the input wire ends and the subordinate connection wires becomes possible. The input wire ends and the connection wires must be simultaneously contacted and pressed together by the clamp-shaped movement of the welding tongs, preferably the movement and force application are basically perpendicular to the plane opened by the corresponding window recess. This gripping must be realized at all three connection planes for each input wire end. Therefore, the connection can be made using a very efficient robot technology. Only the coupling ring needs to be supplied in the position preset by the position of the input wire end, and then welding is performed. As a welding method, all connection technologies responsible for the corresponding heat input can be used, which can preferably also connect different metals to each other. The receiving pockets may also have further notches, lattice structures, etc., as long as it is ensured that the connecting wires are arranged in them in such a way that displacement or unintentional deformation thereof is prevented to the greatest extent possible. A plurality of receiving pockets may be arranged in an annular shape (there may be gaps between or in the receiving pockets). What is important is the common accommodation of the corresponding connecting wires having an annular shape.

[0008] Although the respective connecting wire does not necessarily have to be arranged in the receiving recess over its entire circumference due to, for example, the presence of gaps etc., it is nevertheless expedient according to a further embodiment for at least one of the holding components to have an annularly surrounding receiving recess into which the associated connecting wire is inserted. As a result, the respective connecting wire is protected over the entire circumference and retains its shape. In particular, since the connecting wires are preferably used without their own insulating layer, very good insulation of the connecting wires from one another can also be achieved.

[0009] More preferably, the first retaining assembly can be arranged behind the second retaining assembly when viewed in the direction of the ring axis, wherein the open side or openable side of at least one receiving recess of the first retaining assembly is oriented in the opposite direction relative to the open side or openable side of at least one receiving recess of the second retaining assembly. If "behind" is mentioned here, it refers to the line of sight towards the connecting ring with the excitation coil arranged behind it in the assembly position. This also means that the first connecting wire is inserted into the connecting ring opposite to the second connecting wire. Therefore, the assembly can be carried out simultaneously with a clamp-like movement. There is also a feasible solution in which the two connecting wires are implemented identically and are oriented coaxially with the ring axis.

[0010] Preferably, each receiving pocket has a bottom bridge and two bridge-shaped side walls arranged at a distance from one another, wherein the receiving pocket of the first holding assembly and the receiving pocket of the second holding assembly have a common bottom bridge. This simplifies the design, since each receiving pocket is, in a sense, a receiving guide for at least one section of a connection line. In addition, the common bottom bridge can ensure the desired electrical insulation of the two connection lines from one another.

[0011] Furthermore, it can be advantageously provided that the receiving pockets of the first holding assembly and the second holding assembly have at least a distance member, which can position the first connection line in the first holding assembly and the second connection line in the second holding assembly spaced apart from the bottom bridge or the bottom bridges. Despite the common bottom bridge, the two connection lines are arranged at a sufficiently large distance relative to one another and are therefore well insulated relative to one another even when the bottom bridge itself has only a small thickness. Furthermore, the distance from the bottom bridge also simplifies the removal of the respective connection line with regard to the recycling process, since the respective removal tools can be used better here.

[0012] According to another embodiment, it is provided that the holding component has a latching nose in the region of at least one receiving recess for latching the connection line in the at least one receiving recess. Thus, by inserting the connection line into the subordinate holding component, the connection line is firmly fixed or anchored in the desired position in the at least one subordinate receiving recess. The latching can be designed to be releasable (can be opened without destruction) or non-releasable (can only be opened by destruction). In addition, the latching nose can be produced very easily by means of an injection molding process, as long as the connection ring is produced by injection molding.

[0013] In a variant, the third holding assembly is offset laterally upward relative to the ring axis and arranged behind the second holding assembly. This means that the connecting wire arranged in the third holding assembly is arranged at a minimum distance from the stator of the motor. This lateral offset makes it possible to arrange the third connecting wire in the third plane very easily. Preferably, the third holding assembly is arranged offset upward to the outside, so that the circumferential shape of the third connecting wire is at least larger than the circumferential shape of the second connecting wire.

[0014] More advantageously, the window recess in the first holding assembly can start in the area between the subordinate bottom surface of the bottom bridge of the first holding assembly and the first connecting line and be arranged only in the side wall of the first holding assembly, wherein the window recess in the second holding assembly can start in the area between the subordinate bottom surface of the bottom bridge of the second holding assembly and the second connecting line and be arranged only in the side wall of the second holding assembly. If the window recess is arranged so deep that it can be grasped with a tool below the corresponding connecting line, it can be removed from the corresponding holding assembly very easily, if necessary against the spring force of the at least one latching lug. This simplifies the recovery process.

[0015] Furthermore, it is also possible that the window recess in the third holding assembly is arranged only in the side wall of the third holding assembly and transitions into a bottom opening, by which adjacent bottom bridges are interrupted or separated. Since there is no bottom bridge in the region of the window recess of the third holding assembly, a pressing force can be applied in this region, possibly counteracting the spring force of the at least one latching lug, in order to remove the third connecting line from the third holding assembly again. As a result, it can also be retrieved very easily.

[0016] The outer side wall of at least one receiving recess of the third holding assembly can be designed to be higher than the inner side wall of at least one receiving recess of the third holding assembly, wherein the outer side walls respectively have supplementary recesses, which are aligned with the adjacent window recesses in the second holding assembly so that free lateral access is achieved from the outside of the coupling ring for placing welding tongs to weld the second connecting wire with the respectively subordinate input wire ends. As a result, the third connecting wire located at the outermost part is particularly deep in the receiving recess and is thus protected. Nevertheless, good access to the second connecting wire and the subordinate input wire end can still be achieved by means of the supplementary recess. Therefore, in the case of good protection, the distance between the different arrangement planes of the connecting wires can be kept small.

[0017] According to another embodiment, it is provided that the inner side wall of at least one receiving recess of the second holding assembly is designed to be higher than the outer side wall of at least one receiving recess of the second holding assembly, and the inner side wall has a supplementary notch, which is aligned with the adjacent window notch in the third holding assembly so that free lateral access is achieved from the inner side of the coupling ring for placing welding tongs to weld the third connecting wire with the respectively subordinate input wire end. Good internal coverage is thereby achieved, whereby the input wire end is very well protected. Nevertheless, good access to the third connecting wire and the subordinate input wire end can still be achieved by means of the supplementary notch. Therefore, in the case of good protection, the distance between the different arrangement planes of the connecting wires can be kept small.

[0018] Preferably, the second retaining assembly and the third retaining assembly are connected to each other by means of an offset flange extending perpendicular to the ring axis, wherein the offset flange has an axis-parallel opening, which is respectively aligned with the window recess in the first retaining assembly, and the subordinate input line end can be inserted into the opening for connection with the first connecting line. This makes it possible to guide the input line end for the first connecting line through the intermediate space between the second connecting line and the third connecting line. Usually, the input line end for the first connecting line protrudes farthest beyond the end side of the stator laminated core. By means of the axis-parallel opening, good guidance of the input line end is achieved when the connecting ring is pushed on. This design also makes it possible for all input line ends to be introduced into the connecting ring at the same distance from the ring axis of the connecting ring.

[0019] The invention also relates to a three-phase electric machine having at least six field coils, a stator core, a main axis and a connection unit according to any one of claims 1 to 12, wherein the field coils each have an input line end and each have an output line end, and wherein the input line end is connected to the correspondingly associated connection line in the region of a first end face of the stator core. The electric machine can be manufactured very easily and cost-effectively. An automatable contact with the connection unit is achieved in the region of the end face of the stator core.

[0020] In one embodiment of the motor, it is provided that the output line ends are electrically connected to each other by means of a fourth connecting line that is annularly encircled, and the fourth connecting line is inserted into a non-conductive fourth holding component that imitates a ring shape from the open side of at least one receiving recess of the fourth holding component, the fourth holding component having at least one receiving recess that is open on at least one side, so that the fourth connecting line is held at a parallel distance from the second end side of the stator laminated core, and wherein the fourth holding component has a recess that overlaps with the corresponding output line end, which is arranged so that free access can be achieved for placing welding tongs to weld the fourth connecting line and the corresponding output line end. Therefore, the star connection is carried out at the opposite end sides of the stator laminated core. This can also be produced in a simplified and cost-effective manner, wherein the space requirement is very small. It is also possible to reduce the wiring expenditure at the first end side of the stator laminated core by means of the connecting unit. For this embodiment of the motor, it can also be protected independently of the specific features of the connecting unit and it can therefore be the subject of a sub-application. It is essential that the wiring of the input leads takes place in the region of a first end face of the stator laminated core and that the wiring of the output leads specified in claim 14 is present in the region of a second end face of the stator laminated core.

[0021] More advantageously, the field coil can be arranged on an insulator surrounding the stator teeth of the stator laminated core, wherein the insulator has a fastening device protruding beyond the first end side of the stator laminated core at the outer circumference in an annular manner, on which a coupling ring of the coupling unit is arranged and connected, and / or wherein the insulator has a fourth retaining component forming a shaft ring (Bund) protruding beyond the second end side of the stator laminated core. Therefore, for fixing the coupling unit, components already existing at the motor can be used. The insulator is preferably manufactured by injection molding, so that the required fastening device can be molded together during manufacturing. The fourth retaining component can also be molded in the same way on the opposite side of the insulator. This can reduce manufacturing costs.

[0022] There is also a feasible solution, the receiving pocket of the fourth holding assembly has a bottom bridge and two bridge-shaped side walls arranged at a certain distance from each other, the outer side walls are interrupted in the transition area of ​​the two receiving pockets for constructing the notch and the bottom bridge, wherein the side wall located inside is provided with a component notch aligned with the notch in the transition area of ​​the two receiving pockets, the protruding end of the corresponding output line end is bent into the component notch, wherein the bent end of the corresponding output line end and preferably placed on the fourth connecting line is connected to the fourth connecting ring in the region of the notch and the component notch. The selected connection structure for generating the star connection is constructed in a similar manner to that in the connecting unit. The cross section of the fourth connecting line is preferably the same as the other three connecting lines. Preferably, it can have the same circular shape as the third connecting line, thereby reducing the number of different components in the stator. Due to the distance between the notch and the fourth connecting line and the second end side of the stator laminated core, the fourth connecting line can be pressed out from the fourth holding assembly again, thereby simplifying recycling.

[0023] The invention also relates to the use of a coupling unit according to any one of claims 1 to 12 for connecting to a stator blank for a three-phase motor according to any one of claims 13 to 16, wherein the stator blank has at least three excitation coils, a stator laminated core and a main axis, and wherein the excitation coils each have an input line end and an output line end. The input line ends of the excitation coils extend at a first end side of the stator laminated core in parallel with the main axis and are arranged at the same distance from the main axis, wherein the coupling unit is oriented coaxially with its ring axis to the main axis of the stator blank, and then the coupling unit and the stator blank are coaxially moved relative to each other until the input line ends reach their connection position aligned with the corresponding subordinate window recesses in the three holding components, and finally the input line ends are welded to the corresponding subordinate connection wires by means of welding tongs. Since the input line ends can extend at the corresponding end sides of the stator laminated core in parallel with the axis and at the same distance from the main axis, the connection of the stator blank to the coupling unit is greatly simplified. The coupling unit can be positioned by a simple coaxial push-on. The connection can preferably be made by means of a latch and a corresponding stop on the insulator. Finally, the welding tongs can carry out the welding process required for the electrical contact of the input line end and the corresponding subordinate connection line through the corresponding window recess and the supplementary recess if necessary. The entire process can be carried out automatically. In the same way, the output line end can also extend at the second end side of the stator laminated core at the same distance from the main axis. It is then welded directly to the fourth connection line or bent so that it covers the fourth connection line. In the second case, the welding is then carried out from top and bottom by means of a clamp-like movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Below, an embodiment of the present invention is explained in more detail with reference to the accompanying drawings. For the sake of simplicity, only the essential parts of the stator are shown. The illustration of the housing and the rotor rotating inside the stator is omitted. In addition, reference may be made to known housing and rotor constructions.

[0025] in:

[0026] Figure 1 shows a perspective front view of a stator with a coupling unit according to the invention for an electric machine according to the invention,

[0027] Figure 2 Shows Figure 1 A perspective front view of a stator without a coupling unit according to the invention in FIG.

[0028] Figure 3 Shows Figure 2 A perspective rear view of the stator in

[0029] Figure 4 Shows the layout Figure 1 A perspective view of the field coils in the stator,

[0030] Figure 5 Shows the layout Figure 1 A perspective view of the stator laminated core in the stator of FIG.

[0031] Figure 6 Shows the layout Figure 1 A perspective front view of the insulator in FIG.

[0032] Figure 7 Shows Figure 6 A perspective rear view of the insulator in

[0033] Figure 8 The full cross-section view rotated about the ring axis shows Figure 1 The connection unit in

[0034] Fig. 9 Shows Figure 8 A magnified view of region IX in

[0035] Fig.10 Shows Figure 8 A perspective front view of a cutout connection unit in FIG.

[0036] Fig.11 Shows Fig.10 A perspective rear view of a cut-away connection unit in FIG.

[0037] Fig.12 The view rotated about the ring axis shows Figure 1 Front view of the connection line with contact surface in

[0038] Fig.13 Shows Fig.12 A top view of the connecting line in

[0039] Fig.14 Shows along Figure 7 An enlarged cross-sectional view of the fourth retaining assembly taken along line XIV in FIG. 1 and having the connecting wire inserted, and

[0040] Fig.15 An enlarged front view of the receiving pocket toward the fourth retaining assembly is shown. DETAILED DESCRIPTION

[0041] Figure 1 The stator 1 shown in FIG. 1 is provided for a three-phase motor (not shown), which additionally has a motor housing and a rotor rotatably arranged inside the stator. The stator 1 has a stator core 2 (see also FIG. 2 ) which is shown in a simplified manner. Figure 5 ), twelve excitation coils 3.1, 3.2 and 3.3 shown in simplified form (see Figure 4 ), insulator 4 (see Figure 6 and 7 ) and the connecting unit 5 (see also Figures 8 to 13 ).

[0042] The excitation coils 3.1, 3.2 and 3.3 are each wound from enameled insulated copper wire and have a coil opening 30 in the shape of a rounded rectangle. In cross section, the winding bundles (Wicklungsstrang) of the excitation coils 3.1, 3.2 and 3.3 are approximately trapezoidal, wherein the corners are rounded, whereby the narrow sides pointing toward the inside of the stator also acquire an almost completely circular shape. The excitation coils 3.1, 3.2 and 3.3 are each assigned to one of the three phases of the motor, namely the excitation coil 3.1 of the first phase, the excitation coil 3.2 of the second phase and the excitation coil 3.3 of the third phase. Therefore, in the embodiment shown, four excitation coils 3.1, 3.2 or 3.3 are assigned to each of the three phases. The arrangement of the excitation coils 3.1, 3.2 and 3.3 is carried out in such a way that they are respectively alternated when viewed around. Each of the excitation coils 3.1, 3.2 and 3.3 is provided with an input wire end 6.1, 6.2 or 6.3 at one end (slightly offset laterally). The input wire ends 6.1, 6.2 and 6.3 are the ends of the winding wire axis protruding parallel to the main axis A of the motor. There are three different lengths of axial protrusion of the input wire ends 6.1, 6.2 and 6.3, namely, the input wire end 6.1 has the largest protrusion length, the input wire end 6.2 has an intermediate protrusion length and the input wire end 6.3 has the shortest protrusion length. All input wire ends 6.1, 6.2 and 6.3 are at the same distance from the main axis A and are therefore located on a circular line coaxially surrounding the main axis A.

[0043] At the other end of the field coils 3.1, 3.2 and 3.3, an output terminal 7 is provided approximately in the extension of the outer outer edge. In the blank for the field coils 3.1, 3.2 and 3.3, the output terminal initially protrudes only axially parallel to the main axis A and is at the same distance from the main axis A and is therefore located on a circular line that runs coaxially around the main axis A. The output terminal 7 only acquires the curved shape during the contacting described further below.

[0044] The stator 1 described here and therefore the associated electric machine is operated in a star connection, i.e. the input terminals 6.1, 6.2 and 6.3 are each assigned to one of the three control phases and the output terminals 7 are connected together to form a star point in a manner described in more detail. However, this also means that the corresponding wiring for the star connection is carried out at different ends of the stator 1.

[0045] The stator laminated core 2 is composed of a large number of soft iron laminates of the same shape and insulated from each other, and has protruding stator teeth 8 on its inner side, each of which has a pole shoe 9. There are accommodating channels 10 between the stator teeth 8 for accommodating the excitation coils 3.1, 3.2 and 3.3 and the insulator 4. Longitudinal slots 11 are respectively formed between the pole shoes 9. The pole shoes 9 are concave on their side facing away from the inside of the stator, so that they together form a cylindrical accommodating space (not shown) for the rotor.

[0046] The insulator 4 consists of a first ring part 12 and a second ring part 13. This means that the insulator 4 is divided approximately in the center transversely to its axis. The insulator 4 has a profile on its inner side that imitates the outer profile of the stator teeth 8 and the pole shoes 9, so that the first ring part 12 can be pushed onto the stator laminated core 2 from the first end side 14, and the second ring part 13 can be pushed onto the stator laminated core 2 from the second end side 15. However, the side of the pole shoe 9 pointing to the inside of the stator remains free and is not covered by the insulator 4. The side surfaces of the stator teeth 8 and the pole shoes 9 are completely covered by the insulator 4, wherein the insulator 4 is tightly around them like a sleeve. In the same way, the accommodating channel 10 is also completely lined by the insulator 4. The insulator 4 is made of plastic material by injection molding. The insulator 4 has a polygonal extension in the area of ​​its end ends, wherein the number of angles of the polygon corresponds to the number of excitation coils 3.1, 3.2 and 3.3. As soon as the insulator 4 has been pushed onto the stator core 2 , wherein bonding of the first ring part 12 and the second ring part 13 can take place, the field coils 3 . 1 , 3 . 2 and 3 . 3 are wound onto the insulator 4 and the stator teeth 8 covered by the insulator 4 .

[0047] In addition, the insulator 4 has a fastening device 16 that is annularly encircled at the outer circumference at its first end associated with the first end side 14 of the stator laminated core 2. The annular shape of the fastening device 16 is a dodecagon, which surrounds the end areas of the excitation coils 3.1, 3.2 and 3.3, wherein the corners of the dodecagon are arranged between the two excitation coils 3.1, 3.2 and 3.3 respectively. The fastening device 16 has an offset (Versatz) 17 toward the outside relative to the contour of the insulator 4 surrounding the accommodating channel 10. Therefore, the fastening device 16 is located on the first end side 14 of the stator laminated core 2 and thus serves as a stop when the first ring part 12 of the insulator 4 is introduced. The annular fastening device 16 has a height that roughly corresponds to the protrusion of the excitation coils 3.1, 3.2, 3.3 on the first end side 14 of the stator laminated core 2. There is a latching opening 18 in each polygonal section of the fastening device 16. The fastening device 16 serves to attach the connecting unit 5 in the region of the first end face 14 of the stator core 2 .

[0048] The coupling unit 5 has a coupling ring 19 made of plastic and acting in an insulating manner, which has a dodecagonal shape with rounded corners. The coupling ring 19 is provided on its underside with a dodecagonal collar 20, which can be pushed onto the fastening device 16 with a substantially exact fit. On the inside, the collar 20 is provided with latching lugs 21, which each engage from the outside in the latching opening 18 of the fastening device 16. The coupling ring 19 is provided adjacent to the collar 20 with a stepped shoulder 22, which is located on the end side on the fastening device 16 and thus serves as a stop.

[0049] The coupling ring 19 further comprises a first annular channel-shaped retaining component 23, a second annular channel-shaped retaining component 24 and a third annular channel-shaped retaining component 25. A first coupling line 26 of annular design is arranged in the first retaining component 23, a second coupling line 27 of annular design is arranged in the second retaining component 24 and a third coupling line 28 of annular design is arranged in the third retaining component 25. All three coupling lines 26, 27 and 28 have the same cross-sectional shape (in the present case a square with rounded corners) and consist of copper or a copper alloy (can also be aluminum or an aluminum alloy).

[0050] The first holding component 23 has twelve receiving pockets 29 arranged in a polygonal shape. Each of the receiving pockets 29 of the first holding component 23 has a bottom bridge 31 extending perpendicularly to the ring axis R and two bridge-shaped side walls 32 and 33 arranged perpendicularly thereto and at a certain distance from each other. The side walls 32 and 33 are inclined at the open end of the receiving pocket 29 for better introduction of the first connecting line 26. On the bottom bridge 32, a distance holder 34 is arranged in the corner area of ​​the polygonal shape of the first holding component 23, which is responsible for arranging the first connecting line 26 in the receiving pocket 29 at a corresponding distance relative to the bottom bridge 31.

[0051] The second holding component 24 also has twelve receiving pockets 35 arranged in a polygonal shape. Each of the receiving pockets 29 of the second holding component 24 shares a bottom bridge 31 with the subordinate receiving pocket 29 of the first holding component 23. Starting from the bottom bridge 31, each of the receiving pockets 29 of the second holding component 24 has two bridge-shaped side walls 36 and 37 arranged perpendicular to the bottom bridge 31 and at a certain distance from each other. As a result, the open side of the receiving pocket 29 points away from the first end side 14 of the stator laminated core 2. The side wall 32 and the side wall 36 stand upright and are aligned with each other. In the same way, the side walls 33 and 37 stand upright and are aligned with each other. Therefore, the receiving pocket 29 of the first holding component 23 and the receiving pocket 35 of the second holding component 24 are arranged back to back, so that the open sides of the receiving pockets 29 and 35 point in opposite directions. Accordingly, the first holding assembly 23 is arranged behind the second holding assembly 24 (in the direction of the ring axis R and viewed from below ( Figure 8 )). The sides of the bottom bridge 31 facing the receiving recess 35 are also provided with spacers 34 in the corner regions of the polygonal shape of the second holding component 24, which are responsible for arranging the second connecting wire 27 in the receiving recess 35 at a corresponding distance relative to the bottom bridge 31. The side wall 37 is designed to be longer than the side wall 36, so that in the installed connecting unit 5, the side wall 37 is close to the excitation coils 3.1, 3.2 and 3.3. Similarly, the side walls 36 and 37 are inclined at the open end of the receiving recess 35 for better introduction of the second connecting wire 27.

[0052] Due to the design of the first holding assembly 23 and the second holding assembly 24, the first connecting line 26 and the second connecting line 27 can be implemented identically. In addition, their distance from the ring axis R is the same.

[0053] The third retaining assembly 25 also has twelve receiving pockets 38 arranged in a polygonal shape. Each of the receiving pockets 38 of the third retaining assembly 25 has a bottom bridge portion 39 extending perpendicular to the ring axis R and two bridge-shaped side walls 40 and 41 arranged perpendicularly thereto and at a certain distance from each other. A collar 20 and a stepped shoulder 22 are arranged at the lower side of the bottom bridge portion 39. The side walls 40 and 41 are inclined at the open end of the receiving pocket 38 for better introduction of the third connecting line 28. The upper end of the inner side wall 41 of the receiving pocket 38 is connected to the lower end of the outer side wall 36 by means of an offset flange 42 extending perpendicularly to the ring axis R. Due to this design, the third retaining assembly 25 is relatively close to the ring axis R and viewed from below ( Figure 8 ) is offset upwardly to the outside and arranged behind the second holding assembly 24. The lateral offset produced by the offset flange 42 is selected so that the input line ends 6.1, 6.2, 6.3 can be arranged in the intermediate space between the first connecting line 26 or the second connecting line 27 and the third connecting line 28 in a manner described in more detail. The side wall 40 is designed to be longer than the side wall 41, whereby the side wall 40 better shields the third connecting line 28 from the outside.

[0054] In particular, according to Fig.12 and Fig.13 It can be seen that the connection wires 26, 27 and 28 are located on three planes that are arranged offset along the ring axis R and open perpendicular to the ring axis R. The third connection wire 28 has a larger circumference than the first connection wire 26 and the second connection wire 27. The annular shape of the connection wires 26, 27 and 28 has a gap 43 at one location. The gap 43 is bridged by means of contact plates 44, 45 and 46 that match the corresponding connection wires 26, 27 and 28, respectively. The first contact plate 44 is welded to the first connection wire 26, the second contact plate 45 is welded to the second connection wire 27, and the third contact plate 46 is welded to the third connection wire 28. The first contact plate 44 and the third contact plate 46 are welded to the subordinate connection wire 26 or 28 on the outside, respectively. The second contact plate 45 is welded to the inside of the second connection wire 27. The three contact plates 44, 45, 46 are arranged successively in the radial direction with respect to the ring axis R and extend forward from the connection unit 5 for placing contact plugs (not shown). Each contact plate 44, 45, 46 has a wider curved foot region 47, 48 and 49 and a narrower straight plug region 50, 51, 52. The three connecting wires 26, 27 and 28 are connected to a respective one of the phases by means of contact plugs placed on the plug regions 50, 51, 52.

[0055] The coupling ring 19 has three contact recesses 53, 54 and 55 at corresponding locations. The first contact recess 53 for the first contact plate 44 is located in the side wall 32 of the associated receiving cavity 29. The first contact recess 53 extends from the upper side of the bottom bridge 31 over the entire height of the side wall 32. The second contact recess 54 for the second contact plate 45 extends from the upper edge of the side wall 33 of the receiving cavity 29 to the side wall 37 of the receiving cavity 35. The lower end of the contact recess 54 is substantially at the same height as the lower end of the side wall 36 of the receiving cavity 35. The curvature of the second contact plate 45 is selected so that it does not contact the first connection line 26. The third contact recess 55 is arranged in the side wall 40 of the receiving cavity 38 and extends from the upper edge of the side wall 40 to the bottom bridge 39. The curvature and thickness of the third contact plate 46 are selected so that the third contact plate 46 does not protrude externally beyond the coupling ring 19.

[0056] Each third receiving cavity 29, 35 or 38 in the first, second and third holding components 23, 24 or 25 is provided with a correspondingly subordinate window recess 56, 57, 58. The first window recess 56 is located in the side walls 32 and 33 of each third receiving cavity 29 of the first holding component 23. The two window recesses 56 of the receiving cavity 29 are arranged opposite each other. The height of the window recess 56 corresponds to the height of the side walls 32 and 33, that is, it extends from the upper edge of the side walls 32 and 33 to the upper side of the bottom bridge 31. The window recess 56 in the side wall 32 is designed to be slightly narrower than the window recess 56 in the side wall 33. The reason for this is that a latching lug 59 is arranged next to the window recess 56 at the side wall 32, with which the first connecting line 26 is held in place in the receiving cavity 29 and can be grasped by means of a tool through the oppositely arranged window recess 56 in the side wall 33 for the purpose of recovery. The first holding component 23 has a total of four such latching lugs 59 , each of which adjoins a window recess 56 in the side wall 32 .

[0057] A second window recess 57 is located in the side walls 36 and 37 of each third receiving pocket 35 of the second holding assembly 24. The two window recesses 57 are arranged opposite each other. The height of the window recess 57 corresponds essentially to the height of the side wall 36, i.e., extends from the underside of the bottom bridge 31 to the lower edge of the side wall 36, so that the offset flange 42 is also interrupted in the region of the window recess 57 arranged in the side wall 36. In the side wall 37, there is a window recess 57 that is closed circumferentially on all four sides and is wider than the associated window recess 57 in the side wall 36. The reason for this is that a latching lug 59 is arranged next to the window recess 57 in the side wall 36, with which the second connecting line 27 is held in place in the receiving pocket 35 and can be gripped by means of a tool through the oppositely arranged window recess 57 in the side wall 37 for recovery purposes.

[0058] A third window recess 58 is located in the side walls 40 and 41 of each third receiving pocket 38 of the third holding assembly 25, wherein the window recess 58 transitions into a bottom opening 60, so that the bottom bridge 39 and the collar 20 are also separated in the extension of the window recess 58. The two window recesses 58 are arranged opposite each other. The height of the window recess 58 extends from the upper side of the adjacent bottom bridge 39 to the lower side of the offset flange 42. The window recess 58 in the side wall 40 is designed to be narrower than the oppositely arranged window recess 58 in the side wall 41. The reason for this is that a latching nose 59 is arranged next to the window recess 58 in the side wall 40, with which the third connecting line 28 is held in place in the receiving pocket 38 and can be grasped by means of a tool through the oppositely arranged window recess 58 in the side wall 41 for recovery purposes.

[0059] In order to prevent the side wall 37 of the second retaining assembly 24 from partially covering the third window recess 58 in the radial direction, a supplementary recess 61 is provided in the side wall 37, which is aligned with the third window recess 58 in the side wall 41 and has the same width, so as to continue to ensure the grip on the latching lug 59. The height of the supplementary recess 61 is from the lower side of the side wall 37 ( Fig. 9 ) extends to the height of the underside of the offset flange 42. Four supplementary recesses 61 are arranged evenly distributed overall.

[0060] In order to prevent the side wall 40 of the third retaining assembly 25 from partially covering the second window recess 57 in the radial direction, a supplementary recess 62 is provided in the side wall 40, which is aligned with the second window recess 57 in the side wall 36 and has the same width. The height of the supplementary recess 62 is from the upper side ( Fig. 9 ) extends to the height of the underside of the offset flange 42. Four supplementary recesses 62 are arranged evenly distributed overall.

[0061] The second window recess 57 is arranged offset by 30° relative to the first window recess 56 around the ring axis R. The third window recess 58 is arranged offset by 30° relative to the second window recess 57 around the ring axis R and is arranged offset by 60° relative to the first window recess 56 around the ring axis R. This offset arrangement is repeated four times on the circumference of the coupling ring 19. The first window recess 56 is located at the height of the first coupling plane of the first coupling line 26. The second window recess 57 is located at the height of the second coupling plane of the second coupling line 27. The third window recess 58 is located at the height of the third coupling plane of the third coupling line 28.

[0062] Four axially parallel openings 63 are evenly distributed on the circumference in the offset flange 42 and are aligned with the first window recess 56 of the side wall 32, i.e., are respectively arranged in the center of the first window recess 56. The openings 63 are arranged in such a way that they also partially intersect the side wall 36, extend in a groove-shaped manner on its outer side, and are chamfered in the region of the upper side of the bottom bridge 31. This design enables the input line end 6.1 of the excitation coil 3.1 to also penetrate the coupling ring 19.

[0063] If the connection unit 5 is placed Figure 2 When attaching the coupling unit 5 to the stator blank shown in the figure, care should be taken to make the ring axis R and the main axis A coincide and to rotate the coupling unit 5 in such a way that the first input line end 6.1 is aligned with the opening 63, so that the coupling unit 5 can be placed on the stator blank in the axial direction. The locking lug 21 snaps into the locking opening 18 at the collar 20. The first input line end 6.1 extends through the opening 63, partially through the side wall 36 and into the first window recess 56 of the side wall 32 to approximately the height of the upper edge of the first retaining component 23. The second input line end 6.2 extends directly into the second window recess 57 in the side wall 36 and ends slightly above the second connection line 27 ( Fig. 9 The third input line end 6.3 extends directly into the third window recess 58 in the side wall 41 and ends slightly above the third connection line 28 ( Fig. 9 ). As a result, all input line ends 6.1, 6.2, 6.3 are located directly next to the correspondingly assigned connecting line 26, 27 or 28 at the height of the subordinate connecting plane, without any other elements being arranged between them. Due to the correspondingly assigned first, second and third window recesses 56, 57 and 58 and supplementary recesses 61 and 62, it is now possible to directly grasp the input line ends 6.1, 6.2, 6.3 and the correspondingly assigned connecting line 26, 27 or 28 through these recesses with the help of welding tongs. Therefore, a welding action corresponding to a clamp-like movement can be performed, which is basically carried out transversely to the main axis A. As a result, it is possible to achieve automated and very precise contact between the input line ends 6.1, 6.2 and 6.3 and the correspondingly assigned connecting line 26, 27 or 28.

[0064] The waste-free production of the connecting wires 26, 27 and 28 and the arrangement in the connecting ring 19, which is produced as a tool-free component, ensures cost-effective production. The assembly of the connecting ring 19 with the connecting wires 26, 27 and 28 can also be carried out very simply and automatically. The selected design with the latching position of the connecting wires 26, 27 and 28 and the gripping of the latching lugs 59 and the corresponding underside of the connecting wires 26, 27 and 28 by means of a tool also simplifies the recovery of valuable raw materials.

[0065] The following will be added using Fig.14 and Fig.15The design of the star connection at opposite end sides of the stator laminated core 2 is explained in more detail.

[0066] A fourth retaining component 64 is molded at the second ring portion 13 of the insulator 4, protruding beyond the second end side of the stator laminated core 2 in the form of a collar. The fourth retaining component 64 accommodates the polygonal shape of the second ring portion 13. The fourth retaining component 64 has an offset 65 relative to the section of the second ring portion 13 that lines the accommodating channel 10, which is used to be placed on the second end side 15 of the stator laminated core 2. The fourth retaining component 64 is used to arrange a fourth connecting wire 66. The connecting wire 66 is designed to be the same as the third connecting wire 28. However, there is no gap 43, but the two ends of the fourth connecting wire 66 are butt-welded.

[0067] In order to accommodate the fourth connecting wire 66, the fourth retaining component 64 has receiving pockets 67 that are evenly distributed on the circumference and open on one side. The receiving pockets 67 form a kind of insertion groove for the fourth connecting wire 66. There are notches 68 between the twelve receiving pockets 67. In these notches 68, elastic locking protrusions 69 and component notches 70 are arranged side by side above the adjacent receiving pockets 67. The component notches 70 are aligned with the output wire terminal 7 protruding at the second end side 15 of the stator laminated core 2. Fig.14 As can be seen in the figure, the fourth connecting wire 66 is positioned in the receiving cavity 67 by means of the latching lug 69. The receiving cavity 67 has a bottom bridge 71 and two bridge-shaped side walls 72 and 73 arranged at a distance from each other. The bottom bridge 71 is oriented perpendicular to the main axis A. The two side walls 72 and 73 extend perpendicular to the bottom bridge 71. The bottom bridge 71 is positioned at a distance from the second end side 15 of the stator laminated core 2, so that the fourth connecting wire 66 is also positioned at a distance above the second end side 15 of the stator laminated core 2. The fourth connecting wire 66 is approximately at the height of the correspondingly assigned ends of the excitation coils 3.1, 3.2 and 3.3. Overall, the fourth retaining component 64 only slightly protrudes beyond the coil ends (mainly with the molded parts for the latching lug 69 and the component notch 70).

[0068] When connecting the output terminal 7 of each excitation coil 3.1, 3.2 and 3.3, the end area is first bent into the respective component notch 70 so that it is bent outward by 90°. As a result, the bent end area is located above the fourth connecting line 66 and can be placed on it. Now, the bent end area of ​​the output terminal 7 and the fourth connecting line 66 can be welded to each other with the help of welding tongs. This time, the welding is carried out with the movement of the welding tongs, which is basically implemented from top to bottom parallel to the main axis A. One of the welding jaws travels below the fourth connecting line 66, and the other welding jaw rests on the bent end area of ​​the subordinate output terminal 7. This welding process can also be automated and performed very quickly and accurately.

[0069] Reference Symbols List

[0070] 1 Stator

[0071] 2 Stator laminated core

[0072] 3.1 Excitation coil connected to the first phase

[0073] 3.2 Excitation coil connected to the second phase

[0074] 3.3 Excitation coil connected to the third phase

[0075] 4 Insulator

[0076] 5 Connection unit

[0077] 6.1 Input terminal of excitation coil 3.1

[0078] 6.2 Input terminal of excitation coil 3.2

[0079] 6.3 Input terminal of excitation coil 3.3

[0080] 7 Output terminal

[0081] 8 Number of stators

[0082] 9 Pole Shoes

[0083] 10 Accommodation channel

[0084] 11. Longitudinal seam

[0085] 12 First Ring Section

[0086] 13 Second Ring Section

[0087] 14 First end side

[0088] 15 Second end side

[0089] 16 Fastening equipment

[0090] 17 Offset

[0091] 18 Lock opening

[0092] 19 Coupling ring

[0093] 20 Rings

[0094] 21 Locking nose on collar

[0095] 22 Step Shoulder

[0096] 23. First retaining component

[0097] 24 Second holding component

[0098] 25 Third retaining assembly

[0099] 26 First connection line

[0100] 27 Second connection line

[0101] 28 Third connecting line

[0102] 29 Accommodating recess of the first retaining assembly 23

[0103] 30 Coil opening

[0104] 31 Bottom bridge

[0105] 32 The outer wall of the receiving cavity 29

[0106] 33 The inner wall of the receiving cavity 29

[0107] 34 Distance Keeper

[0108] 35 Accommodating recess of the second retaining assembly

[0109] 36 The outer wall of the receiving cavity 35

[0110] 37 The inner wall of the receiving cavity 35

[0111] 38 The receiving recess of the third holding component 25

[0112] 39 The bottom bridge portion of the receiving cavity 38

[0113] 40 The outer side wall of the receiving cavity 38

[0114] 41 The inner wall of the receiving cavity 38

[0115] 42 Offset flange

[0116] 43 Gap

[0117] 44 First contact plate

[0118] 45 Second contact plate

[0119] 46 Third contact plate

[0120] 47 First foot area

[0121] 48 Second foot area

[0122] 49 Third foot area

[0123] 50 First plug area

[0124] 51 Second plug area

[0125] 52 Third plug area

[0126] 53 First contact notch

[0127] 54 Second contact notch

[0128] 55 Third contact notch

[0129] 56 First window notch

[0130] 57 Second window notch

[0131] 58 Third window notch

[0132] 59 Locking nose in window recess

[0133] 60 Bottom opening

[0134] 61 Supplementary notch

[0135] 62 Supplementary notch

[0136] 63 Opening

[0137] 64 Fourth holding component

[0138] 65 offset

[0139] 66 Fourth connection line

[0140] 67 Receiving recess of the fourth retaining assembly 64

[0141] 68 notch

[0142] 69 Locking nose at fourth retaining assembly

[0143] 70 component gap

[0144] 71 bottom bridge portion of the receiving cavity 67

[0145] 72 The outer wall of the receiving cavity 67

[0146] 73 accommodates the inner side wall of the recess 67

[0147] A Main axis

[0148] R ring axis

Claims

1. A connection unit (5) for a three-phase motor, the motor having at least six excitation coils (3.1, 3.2, 3.3), the excitation coils each having an input terminal (6.1, 6.2, 6.3) and an output terminal (7), wherein: The connection unit (5) comprises a non-conductive connection ring (19), the connection ring having a ring axis (R) and three retaining components (23, 24, 25) respectively imitating a ring shape, the retaining components respectively having at least one receiving recess (29, 35, 38) which is open on at least one side or can be opened on at least one side, and the connection ring comprises three connection wires (26, 27, 28) respectively matched to one of the ring shapes of the three retaining components (23, 24, 25), the connection wires respectively being inserted from the open side or the openable side of at least one subordinate receiving recess (29, 35, 38), wherein the three connection wires (26, 27, 28) are arranged on different connection planes as viewed in the direction of the ring axis (R) and can be electrically connected to input line terminals (6.1, 6.2, 6.3) of excitation coils (3.1, 3.2, 3.3) respectively associated with one of the three phases.

2. The coupling unit (5) according to claim 1, characterized in that The coupling ring (19) has a window recess (56, 57, 58) on each of the three coupling planes, which is configured to overlap the respectively associated input line end (6.1, 6.2, 6.3) so that free access is possible both from the inside and from the outside of the coupling ring (19) for positioning welding tongs for welding the corresponding coupling line (26, 27, 28) to the respectively associated input line end (6.1, 6.2, 6.3).

3. The coupling unit (5) according to claim 1 or 2, characterized in that: At least one of the holding components (23, 24, 25) has an annularly circumferential receiving recess (29, 35, 38) in which the associated connecting line (26, 27, 28) is received.

4. The coupling unit (5) according to any one of claims 1 to 3, characterized in that: The first retaining component (23) can be arranged behind the second retaining component (24) when viewed in the direction of the ring axis (R), wherein the open side or openable side of at least one accommodating recess (29) of the first retaining component (23) is oriented in the opposite direction relative to the open side or openable side of at least one accommodating recess (35) of the second retaining component (24).

5. The coupling unit (5) according to any one of claims 1 to 4, characterized in that: Each receiving pocket (29, 35, 38) has a bottom bridge portion (31, 39) and two bridge portion-shaped side walls (32, 33; 36, 37; 40, 41) arranged at a certain distance from each other, and the receiving pocket (29) of the first retaining component (23) and the receiving pocket (35) of the second retaining component (24) have a common bottom bridge portion (31).

6. The coupling unit (5) according to claim 5, characterized in that At least the receiving recess (29) of the first retaining component (23) and the receiving recess (35) of the second retaining component (24) have a distance retaining element (34), which can position the first connecting line (26) in the first retaining component (23) and the second connecting line (27) in the second retaining component (24) to be spaced apart from one bottom bridge portion (31) or multiple bottom bridge portions (31).

7. The coupling unit (5) according to any one of claims 1 to 6, characterized in that: The holding assembly (23, 24, 25) has a latching lug (59) in the region of at least one receiving recess (29, 35, 38) for latching the connecting line (26, 7 20, 28) in the at least one receiving recess (29, 35, 38).

8. The coupling unit (5) according to any one of claims 4 to 7, characterized in that: The third holding assembly (25) is laterally offset relative to the ring axis (R) and is arranged behind the second holding assembly (24).

9. The coupling unit (5) according to any one of claims 4 to 8, characterized in that: The window recess (56) starts in the first retaining component (23) in the area between the subordinate bottom surface of the bottom bridging portion (31) of the first retaining component (23) and the first connecting line (26), and is only arranged in the side walls (32, 33) of the first retaining component (23), and the window recess (57) starts in the second retaining component (24) in the area between the subordinate bottom surface of the bottom bridging portion (31) of the second retaining component (24) and the second connecting line (27), and is only arranged in the side walls (36, 37).

10. The coupling unit (5) according to claim 8 or 9, characterized in that: The window recess (38) is arranged in the third holding component (25) only in the side walls (40, 41) of the third holding component (25) and transitions into a bottom opening (60) by which the adjacent bottom bridge (39) is interrupted or separated.

11. The coupling unit (5) according to any one of claims 8 to 10, characterized in that: The outer side wall (40) of at least one accommodating recess (38) of the third retaining component (25) is designed to be higher than the inner side wall (41) of at least one accommodating recess (38) of the third retaining component (25), and the outer side wall (40) has a supplementary recess (62) which is aligned with the adjacent window recess (57) in the second retaining component (24) so ​​as to enable free lateral access from the outside of the connecting ring (19) for placing welding tongs to weld the second connecting line (27) to the respectively subordinate input line end (6.2).

12. The coupling unit (5) according to any one of claims 8 to 11, characterized in that: The inner wall (37) of at least one accommodating recess (35) of the second retaining component (24) is designed to be higher than the outer wall (36) of at least one accommodating recess (35) of the second retaining component (24), and the inner wall (37) has a supplementary recess (61) which is aligned with the adjacent window recess (58) in the third retaining component (25) so as to enable free lateral access from the inner side of the connecting ring (19) for placing welding tongs to weld the third connecting line (28) to the respectively subordinate input line end (6.3).

13. The coupling unit (5) according to any one of claims 8 to 12, characterized in that: The second retaining component (24) and the third retaining component (25) are connected to each other by means of an offset flange (42) extending perpendicularly to the ring axis (R), and the offset flange (42) has an axis-parallel opening (63), which is respectively aligned with the window recess (56) in the first retaining component (23), and the subordinate input line end (6.1) can be inserted into the opening (63) for connection with the first connecting line (26).

14. A three-phase electric machine, comprising at least six excitation coils (3.1, 3.2, 3.3), a stator laminated core (2), a main axis (A) and a coupling unit (5) according to any one of claims 1 to 13, wherein the excitation coils (3.1, 3.2, 3.3) each have an input line end (6.1, 6.2, 6.3) and an output line end (7), and wherein, The supply line ends (6.1, 6.2, 6.3) are connected to respectively associated connecting lines (26, 27, 28) in the region of a first end side (14) of the stator laminated core (2).

15. The three-phase motor with star connection according to claim 14, characterized in that: The output line ends (7) are electrically connected to each other by means of a fourth connecting wire (66) which is encircled in an annular shape, and the fourth connecting wire (66) is inserted into a non-conductive fourth retaining component (64) which imitates the annular shape from an open side or an openable side of at least one accommodating recess (67) of the fourth retaining component (66), and the fourth retaining component (64) has at least one accommodating recess (67) which is open on at least one side or can be opened on at least one side, so that the fourth connecting wire (66) is held at a parallel distance from the second end side (15) of the stator laminated core (2), and wherein, The fourth holding component (64) has a recess (68) arranged overlapping with the corresponding output line end (7), so that free access is achieved for placing welding tongs to weld the fourth connecting line (66) and the corresponding output line end (7).

16. The three-phase motor according to any one of claims 14 or 15, characterized in that: The excitation coil (3.1, 3.2, 3.3) is arranged on an insulator (4) surrounding the stator teeth (8) of the stator laminated core (2), and the insulator (4) has a fastening device (16) protruding beyond the first end side (14) of the stator laminated core (2) in an annular shape at the outer circumference, the connecting ring (19) of the connecting unit (5) is located on the fastening device, whereby the connecting ring (19) is connected to the connecting unit (5), and / or the insulator (4) has a shaft ring protruding beyond the second end side (15) of the stator laminated core (2), which constructs the fourth retaining component (64).

17. The three-phase motor according to claim 15 or 16, characterized in that: The receiving cavity (67) of the fourth retaining component (64) has a bottom bridge portion (71) and two bridge portion-shaped side walls (72, 73) arranged at a certain distance from each other, the outer side wall (72) is interrupted in the transition area of ​​the two receiving cavities (67) for constructing a recess (68) and the bottom bridge portion (71), and a component notch (70) aligned with the recess (68) is provided at the inner side wall (73) in the transition area of ​​the two receiving cavities (67), and the protruding end of the corresponding output line end (7) is bent into the component notch (68), wherein the bent end of the corresponding output line end (7) placed on the fourth connecting line (66) is connected to the fourth connecting line (66) in the area of ​​the recess (68) and the component notch (70).

18. Use of a coupling unit (5) according to any one of claims 1 to 13 for connection to a stator blank for a three-phase motor according to any one of claims 14 to 17, wherein the stator blank has at least three excitation coils (3.1, 3.2, 3.3), a stator laminated core (2) and a main axis (A), and wherein the excitation coils (3.1, 3.2, 3.3) respectively have input line ends (6.1, 6.2, 6.3) and output line ends (7), It is characterized in that The input wire ends (6.1, 6.2, 6.3) of the excitation coils (3.1, 3.2, 3.3) extend out from the first end side (14) of the stator laminated core (2) in parallel with the main axis (A) and are arranged at the same distance from the main axis (A). The coupling unit (5) is oriented coaxially with the main axis (A) of the stator blank with its ring axis (R). Subsequently, the coupling unit (5) and the stator blank are oriented. Subsequently, the coupling unit (5) and the stator blank are moved coaxially relative to each other until the input wire ends (6.1, 6.2, 6.3) reach a connection position in which they are aligned with the corresponding subordinate window recesses (56, 57, 58) in the three retaining components (23, 44, 25), and finally, the input wire ends (6.1, 6.2, 6.3) are welded to the corresponding subordinate connection wires (26, 27, 28) with the aid of welding tongs.

Images