Method for manufacturing an electric machine

Abstract

The present invention relates to a method for manufacturing an electric motor (50), wherein a plurality of stator ring segments (10) are closely abutted against each other and subsequently interconnected when forming a stator ring (20). In a variant of the invention, after the stator ring (20) is formed, a radially inward pressing force (F) is generated by a pressing device, by which the stator ring segments (10) are tangentially pressed against each other, and in the pressed state, an external coating is applied to the radially outward outer surfaces (13) of the stator ring segments (10), the external coating forming a single, integral outer covering layer (21) on the stator ring (20).

Description

Technical Field

[0001] The present invention relates to a method for manufacturing an electric motor, wherein a plurality of stator ring segments are close to each other and subsequently connected to each other in the formation of stator rings. Background Technology

[0002] The problem with this type of method is that air gaps may appear between tangentially adjacent stator ring segments, which can increase the magnetic reluctance between the stator ring segments. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to improve the aforementioned type of method, thereby ensuring that the stator ring segments that are adjacent to each other are in the closest possible contact and that the magnetic reluctance between adjacent stator ring segments is as small as possible.

[0004] The technical problem described herein is solved by a method for manufacturing an electric motor and an electric motor.

[0005] According to the present invention, after the stator rings are formed, a radially inward pressing force is generated by a pressing device. The stator ring segments are tangentially pressed together by this pressing force. In the state of mutual pressing, an external coating is applied to the outer surface of the stator ring segments located radially outward. The external coating forms a complete and integral external covering layer on the stator rings.

[0006] The main advantage of the method according to the invention is that by applying an external covering layer to the stator rings while the stator ring segments are pressed together, the stator ring segments can remain radially pressed after the manufacturing process is completed, thereby maintaining the compressive force acting tangentially on the stator ring segments, thereby minimizing the magnetic reluctance between adjacent stator ring segments.

[0007] In other words, it is advantageous that after the external coating is applied, the extrusion pressure generated by the extrusion device is stopped, and the extrusion pressure generated by the extrusion device during coating is then completely or at least largely maintained by the external cover layer, and the stator ring segments are kept tangentially pressed together by the integral external cover layer.

[0008] The external coating is manufactured by cold-spraying, flame spraying, thermal spraying, or by welding for metallic materials.

[0009] For possible designs or manufacturing of cold air spray coatings, please refer to references such as "Review on Cold Spray Process and Technology Part I - Intellectual Property" (Irissou et al., Journal of Thermal Spray Technology, 17, 4, pp. 495-516, 2008).

[0010] The outer covering layer of the stator is preferably a metal layer, especially a steel layer.

[0011] The elastic modulus of the cover material preferably corresponds at least approximately to the elastic modulus of the motor housing with a maximum error of ±60%, and the stator is installed, preferably squeezed into, the housing.

[0012] If the outer covering is made of steel with an E modulus of 210 GPa, the shell can be made of, for example, ductile gray cast iron with an E modulus of about 130 GPa.

[0013] After the external coating is applied, the coated stator ring is preferably machined on a lathe, wherein the diameter of the coated stator ring reaches a preset nominal diameter and / or the surface of the external coating is made smooth.

[0014] The coated stator ring is preferably extruded into the housing of the machine, wherein the outer coating of the coated stator ring is pressed against the inner wall of the housing.

[0015] Auxiliary devices are preferably integrated in at least one stator ring segment, preferably all stator ring segments. Pressure or tension is preferably applied radially to the auxiliary devices by the extrusion device, the pressure or tension constituting the extrusion force or at least contributing to the generation of the extrusion force.

[0016] Advantageously, at least one auxiliary device is a track that extends axially through or along a stator ring segment to which the track is associated and protrudes as an axial end section at the axial end of the stator ring segment, and pressure or tension is applied radially to the axial end section by the extrusion device, the pressure or tension constituting the extrusion force or at least contributing to the generation of the extrusion force.

[0017] After the external coating is applied, the axial end section of the protrusion is preferably shortened or completely removed.

[0018] Furthermore, at least one stator ring segment, preferably all stator ring segments, each has a form fitting located radially inward, a tension element is respectively mounted on one or more form fittings, and a tension force is applied radially inward to the form fittings by the extrusion device, the tension force constituting the extrusion force or at least contributing to the generation of the extrusion force.

[0019] Advantageously for stator ring segments, in order to manufacture at least one, preferably each, stator ring segment, multiple stator ring segment plates are stacked and pressed together. The radially outer end faces of these pressed stator ring segment plates are coated with a segment-by-segment layer, which constitutes a radially outer segment cover layer of the corresponding stator ring segment, and the stator ring is formed by one or more coated stator ring segments.

[0020] After the section itself has been coated with its own section cover layer, it is preferable to stop pressing the stator ring section plate.

[0021] Advantageously, the section cover layer of the section itself thus retains mechanical force completely or at least most (preferably at least 50%), which is applied to compress the multiple stator ring plate plates when the section cover layer of the section itself is applied.

[0022] The section cover layer of the stator ring segment itself is preferably manufactured by cold air spraying, flame spraying, thermal spraying and / or welding processes for metallic materials.

[0023] After assembling multiple coated stator ring segments, it is preferable to apply the external coating to the segment cover layer of these stator ring segments themselves, such that the complete and integral external cover layer of the stator ring is disposed on the segment cover layer of the multiple stator ring segments themselves.

[0024] The external coating or stator-side cover and / or at least one, preferably all, section-side cover is preferably a metallic layer, especially a steel layer. The elastic modulus preferably deviates from the elastic modulus of the motor housing by a maximum of ±60%.

[0025] The stator ring is preferably at least sectionally cylindrical and has a cover layer with a cylindrical cross-section therein.

[0026] The present invention also relates to an electric motor having a plurality of stator ring segments that are close to and interconnected when forming a stator ring.

[0027] According to the present invention, in terms of the equipment, these stator ring segments are tangentially pressed together, that is, they are tangentially pressed together by an external coating applied to the outer surfaces of these stator ring segments, the external coating forming a complete and integral external covering layer on the stator rings.

[0028] The advantages of the motor according to the invention and its advantageous design can be found in the description of the method according to the invention and its advantageous design.

[0029] Advantageously, these stator ring segments each have multiple mutually pressed stator ring segment plates, which are coated with their own segment cover layer on their radially outer end faces, and the complete, integral outer cover layer of the stator ring is disposed on the segment cover layer of the multiple stator ring segments.

[0030] The section covers of these sections preferably retain mechanical force along the axial direction of the machine's rotation axis, either completely or at least mostly (preferably at least 50%), which is applied to press the multiple stator ring plates together when the section covers are applied.

[0031] The present invention also relates to a method for manufacturing an electric motor, wherein stator plates, particularly stator ring plates, are pressed together and connected to each other by means of an extrusion device. According to the invention, with respect to the last mentioned method, an external coating is applied while the plates are pressed together; after the external coating is applied, the extrusion pressure generated by the extrusion device is stopped, and the extrusion pressure generated during coating is then completely or at least largely (preferably at least 50%) retained by the external coating.

[0032] The above description of the coating is applicable in conjunction with the method mentioned last in accordance with the present invention.

[0033] The external coating can form an external covering layer for the stator. Alternatively, the external coating can form a section covering layer for the stator section itself.

[0034] The stator plates can be annular and form a complete stator ring when they are pressed together; in this case, the external coating preferably forms the external covering layer of the stator.

[0035] Alternatively, the stator plate can be a stator ring segment plate, wherein multiple stator ring segment plates are pressed together to form a stator ring segment, wherein the radially outer end face of the pressed stator ring segment plate is coated with an external coating, which constitutes a segmental cover layer of the radially outer stator ring segment. A stator ring can be formed by multiple such coated stator ring segments.

[0036] The stator ring, which consists of multiple coated stator ring segments, can then undergo a second coating, wherein the second outer coating constitutes the outer cover layer of the stator. Attached Figure Description

[0037] The present invention is described in detail below with reference to embodiments; exemplarily illustrated in the accompanying drawings:

[0038] Figure 1 An embodiment of a stator ring segment is shown in a top view along the axial direction, which can be used to construct a stator for an electric motor.

[0039] Figure 2 The stator ring is shown in a top view along the axial direction, the stator ring being composed of... Figure 1 The stator ring segment shown is constructed as described.

[0040] Figure 3 The top view along the axial direction shows the arrangement of... Figure 2 The stator formed after applying an external covering layer to the stator rings,

[0041] Figure 4 The formed according to the longitudinal section along the axial direction or along the central axis of the stator is shown. Figure 3 The stator, wherein the central axis constitutes the rotation axis of the motor.

[0042] Figure 5 This shows the process of reprocessing the outer covering layer according to... Figure 4 The stator,

[0043] Figure 6 An embodiment of a stator ring segment is shown in a three-dimensional oblique view, which can be used to construct the stator for an electric motor.

[0044] Figure 7 The stator is shown in a top view along the axial direction, the stator being composed of Figure 6 The stator ring segment shown is constructed and has a covering layer.

[0045] Figure 8 The longitudinal section along the axial direction or along the central axis of the stator is shown according to... Figure 7 The stator,

[0046] Figure 9 The longitudinal section along the axial direction or along the central axis of the stator shows the arrangement after removing the axially projecting track section. Figure 7 The stator,

[0047] Figure 10 A three-dimensional view from an oblique angle shows the arrangement of gripping tools used to generate tensile stress. Figure 6 The stator ring segment,

[0048] Figure 11-12 The diagram illustrates an advantageous method for manufacturing stator ring segments, namely, coating the pressed stator ring segment sheet material onto the end edge sides using cold air spraying to form a layer that maintains the segment's own compressive stress.

[0049] Figure 13 The stator is shown in a top view along the axial direction, the stator being composed of Figure 11The stator ring segments shown are respectively equipped with segment cover layers to maintain compressive stress, and the segment cover layers are provided on the segments themselves.

[0050] Figure 14 The components of an embodiment of a motor are shown in cross-section, the motor being equipped with an exemplary combination Figures 1 to 13 The stator described.

[0051] In the accompanying drawings, for clarity of illustration, the same reference numerals are always used for the same or similar parts. Detailed Implementation

[0052] Figure 1 An embodiment of stator ring segment 10 is shown, which can be used to construct a stator ring for a motor. According to... Figure 1 The stator ring segment 10 has in its radially outer region Figure 1 Contact surface 11 on the left side and Figure 1 The contact surface 12 on the right side of the middle. If, in order to construct the stator ring, the stator ring segment 10 is connected to... Figure 1 If another stator ring segment 10 with the same structure (not shown) is assembled, then the left contact surface 11 of each stator ring segment 10 is respectively adjacent to the right contact surface 12 of the adjacent stator ring segment 10, and the right contact surface 12 is respectively adjacent to the left contact surface 11 of another adjacent stator ring segment 10.

[0053] The outer surface 13 of the stator ring segment 10 located radially outward is preferably composed of a segment cover layer, as described below in particular. Figure 11 and Figure 12 The section covering layer will be described in more detail.

[0054] Before or after assembling the stator rings, the stator rings are installed in the radially inner region 14 of the stator ring segment 10 by winding or pushing. Figure 1 Coil not shown.

[0055] In accordance with Figure 1 In one embodiment, the stator ring segment 10 has a shape-joining segment 15 in a radially inward region, which engages with a gripping tool (not shown). This gripping tool allows for the generation of a radially inward pulling force along the radial direction R when multiple stator ring segments 10 are mounted close together or after the stator rings are assembled. (The following is a continuation of the previous section...) Figure 10 An exemplary embodiment of the gripping tool is described in detail.

[0056] Figure 2 This shows the arrangement of the stator rings 20, which together form the stator 20 (hereinafter also referred to as stator 20), after being mounted or assembled close to each other. Figure 1Multiple stator ring segments 10. It can be seen that in each stator ring segment 10, the left contact surface 11 is adjacent to the right contact surface 12 of the adjacent stator ring segment 10, and the right contact surface 12 is adjacent to the left contact surface 11 of another adjacent stator ring segment 10. The outer surface 13 of the stator ring segment 10 constitutes... Figure 2 The outer surface of the stator 20 that has not yet been coated.

[0057] To ensure that no air gap exists between the contact surfaces 11 and 12 of adjacent stator ring segments 10 that would impede the magnetic flux between the stator ring segments 10 or increase the magnetic reluctance between the stator ring segments 10, such as... Figure 3 As shown, a compressive force F is applied to the stator ring segment 10. The compressive force F is applied along the path according to... Figure 2 The radial force R presses or pulls the stator ring segment 10 radially inward. The compressive force F presses the contact surfaces 11 and 12 of adjacent stator ring segments tangentially against each other. This minimizes the air gap between the contact surfaces 11 and 12 when the compressive force F is applied.

[0058] In order to maintain the compressive force F continuously, an external coating is applied to the outer surface 13 of the stator ring segment 10 located on the radially outer side, the external coating forming a complete outer cover layer 21 on the stator ring 20.

[0059] The material and thickness of the cover layer 21 are chosen such that after the cover layer 21 is applied, it is not necessary to apply a compressive force F from the outside; instead, the compressive force is then completely or at least most (preferably at least 50%) retained by the outer cover layer 21. This allows the stator ring segments 10 to be tangentially pressed together by the outer cover layer 21.

[0060] Particularly advantageous is that the application of the outer coating layer 21 is achieved by means of cold air spraying, wherein the cold air spraying is applied in… Figure 3 The figures are schematically represented by arrows with the reference numeral KGS.

[0061] During cold gas spraying, the process gas, preferably nitrogen or helium, is heated to several hundred degrees (preferably up to about 1100 degrees) in the spray gun at a pressure of about 50 bar. The process gas then expands to supersonic speed in the Laval nozzle of the spray gun. The powder material that subsequently forms the coating layer 21 is injected into the process gas jet.

[0062] The powdered material or injected particles are accelerated to supersonic speeds by process gas and impact the outer surface 13 of the stator ring segment 10 at a speed preferably up to 1200 m / s, where a coating is formed upon impact. This coating is a thick, firmly adhered layer with low oxygen or oxide content. The stator ring segment 10 typically does not reach a temperature higher than 100°C, thus minimizing the thermal load on the stator ring segment during coating.

[0063] Steel, preferably of the grades H13, M3, 304, 316L, 430L, A286, M152, S420 or 8620, is used as the powder material. Alternatively or additionally, nitrides, such as aluminum nitride or ceramic materials, may also be advantageously applied to the outer surface 13 of the stator ring segment 10.

[0064] Alternatively, other coating methods, such as flame spraying, high-velocity flame spraying, other known thermal spraying processes for metallic materials, or weld overlay, may be used instead of the aforementioned cold air spraying; however, it is advantageous to keep the heat input during coating as low as possible, which is why cold air spraying is considered particularly suitable.

[0065] The thickness of material layer 21 is preferably in the range of 3 to 8 mm after turning.

[0066] Figure 4 A longitudinal section along axis A shows the stator 20 coated with an outer cover layer 21. It can be seen that each stator ring segment 10 has a stator ring segment plate 100, which are arranged sequentially along axis A and preferably pressed against each other. Axis A corresponds to the rotation axis of the rotor, which is installed in the stator 20 of the motor.

[0067] The outer covering layer 21 is here combined Figure 3 As described, the stator ring segment 10 is held in place by a radially inward preload.

[0068] Figure 5 The coated stator 20 is shown during further machining using a lathe or cutting tool 30 (not shown in detail). The coated stator 20 is machined using a lathe or cutting tool 30, wherein the diameter is brought to a preset nominal diameter and the surface of the outer coating 21 is smoothed.

[0069] Figure 6 A particularly preferred variant design of the stator ring segment 10 is shown from an oblique side in a three-dimensional view. It can be seen that a track 110 is mounted on the outer side 13, the track as follows: Figure 6 The example shown is a T-shaped rail that is resistant to bending (relative to the compressive force to be applied). In this embodiment, section 111 of rail 110 points radially outward.

[0070] The track 110 protrudes along the axial direction A from the axial end section E10 of the stator ring section 10, and makes it possible to apply tension or pressure along the radial direction R to the stator ring section 10 there in a particularly simple manner.

[0071] The coil 16 is inserted / wound onto the central region of the stator ring segment 10 when viewed radially, and thus lies between the shape-joining segment 15 formed by the pole shoe and the outer side 13.

[0072] Figure 7 A stator 20 coated with an outer cover layer 21 is shown, the stator being constructed according to... Figure 6 The stator ring segment 10 is composed of an externally applied outer covering layer 21, which can be designed in terms of its thickness such that segment 111 is as... Figure 7 It is completely embedded in the cover layer 21 as shown. Alternatively, segment 111 may protrude radially.

[0073] Figure 8 The longitudinal section shows the arrangement according to Figure 7 The stator 20 is coated with a cover layer 21. As can be seen, the track 110 protrudes axially at the end E10 of the stator ring segment 10, thereby allowing a compressive force F in the form of tension or pressure to be applied there particularly easily along the radial direction R.

[0074] After applying the outer covering layer 21, it can be as follows Figure 9 As exemplarily shown, the section of the protruding axial end E10 of the track 110 can be shortened or removed; in Figure 9 The lieutenant general cut off the prominent section of the track.

[0075] Figure 10 Showing according to Figure 6 The embodiments are variations of the above. It can be seen that, in addition to track 110, or as an alternative to track 110, a gripping tool 40 acting as a pulling element can also be used to generate radial tension. The gripping tool 40 cooperates with the radially inner shape-fitting section 15 of the stator ring segment 10. The shape-fitting section 15 can be as follows: Figure 1 The contraction shown, or it could be as follows: Figure 10 The extreme boot shown.

[0076] Figure 10 The gripping tool 40 shown and Figure 10 The tracks 110 shown can all be used to generate according to Figure 3 The pressure F. Alternatively feasible is to take only one of the two measures, i.e., only through... Figure 6 and Figure 10 The track 110 shown may be generated by means of the gripping tool 40 and the shape-jointing section 15 according to Figure 3 The compressive force F.

[0077] Figure 11 An example of manufacturing bonding is shown. Figures 1 to 10The stator ring segment 10 is described as having an advantageous method. The stator ring segment 10 is composed of stator ring segment plates 100, which are pressed together along the axial direction A by means of a compressive force F.

[0078] Then as Figure 12 As shown, a segment-by-segment layer 102 is applied to the radially outer end face 101 of the stator ring segment plate 100. This segment-by-segment layer constitutes a radially outer segment cover layer and thereby forms the outer surface 13 of the corresponding stator ring segment 10. In addition to coating, the radially inner end face of the stator ring segment plate 100 may also be coated, for example, in such a way that the segment-by-segment layer 102 encloses the entire stator ring segment 10.

[0079] Particularly advantageous is that the application of layer 102 to the section itself is achieved by means of cold air spraying, wherein the cold air spraying is... Figure 12 The figures are schematically represented by arrows with the reference numeral KGS.

[0080] In cold air spraying, steel, preferably steel of the grades H13, M3, 304, 316L, 430L, A286, M152, S420 or 8620, is preferred as the powder material. Alternatively or additionally, nitrides, such as aluminum nitride or ceramic materials, may also be applied in an advantageous manner.

[0081] Alternatively, other coating methods, such as flame spraying, high-velocity flame spraying, other known thermal spraying processes for metallic materials, or weld overlay, may be used instead of the aforementioned cold air spraying; however, it is advantageous to keep the heat input during coating as low as possible, which is why cold air spraying is considered particularly suitable.

[0082] The material and thickness of the segment's own layer 102 are chosen such that after the segment's own layer 102 is applied, it is not necessary to apply a compressive force F from the outside; instead, the compressive force is then fully or at least largely (preferably at least 50%) held by the segment's own layer 102. The stator ring plate 100 is thus held together by the segment's own layer 102 along the axial direction A.

[0083] The thickness of layer 102 of the section itself is preferably in the range of 1 to 3 mm.

[0084] After coating, the surface of the section cover can be smoothed and the diameter of the stator ring section can be reduced by using the cutting tool 30 on a lathe.

[0085] Figure 13 Stator 20 is shown in cross-section, the stator being constructed according to... Figure 12 The stator ring segment 10 is formed. It can be seen that after the stator ring segment 10 is assembled into a stator ring, an external compressive force F is generated, which has already combined with... Figure 3This has been described previously. Next, an external coating is applied to the mutually pressed stator ring segments 10, forming a complete, integral external covering layer 21 on the stator rings, which has already been combined with… Figure 3 It has been explained.

[0086] In accordance with Figure 13 In one embodiment, the outer cover layer 21 of the coated stator 20 is located on the section cover layer 102 of the stator ring segment 10.

[0087] The section cover 102 of the stator ring segment 10 is used to keep the stator ring segment plates 100 pressed together along the axial direction, while the cover 21 on the coated stator 20 is used to keep the stator ring segment 10 pressed inward in the radial direction, thereby keeping the contact surfaces 11 and 12 of the stator ring segment pressed together tangentially.

[0088] Figure 14 An embodiment of the components of a motor 50 is shown, the motor being assembled with the combination described above. Figures 1 to 13 The coated stator 20 is described in detail. It can be seen that the stator 20 is inserted into the housing 60 of the motor 50. Particularly advantageously, the inner wall side 61 of the housing 60 is provided with grooves, which, together with the outer covering layer 21 of the coated stator 20, form a cooling channel 70, which allows for the flow of coolant for cooling the stator 20. The grooves for guiding the coolant can extend within the housing, for example, circumferentially, spirally, radially, and / or in a zigzag pattern.

[0089] Although the invention has been illustrated and described in detail with reference to preferred embodiments, the invention is not limited to the disclosed examples and other solutions can be derived by those skilled in the art without departing from the scope of protection of the invention.

[0090] List of reference numerals

[0091] 10 Stator segments

[0092] 11 Contact Surface

[0093] 12 Contact surfaces

[0094] 13. The outer surface located radially outward

[0095] 14. Region located radially inward

[0096] 15 Shape-jointing section

[0097] 16 coils

[0098] 20 Stator Rings / Stator

[0099] 21 Covering layer

[0100] 30 Cutting tools

[0101] 40. Gripping tools

[0102] 50 motors

[0103] 60 Housing

[0104] 61 Inner wall side

[0105] 70 Cooling Channels

[0106] 100 stator ring plate

[0107] 101 The end face located on the radially outer side

[0108] Section 102 itself

[0109] 110 track

[0110] Section 111

[0111] Axial

[0112] E10 Axial End Section

[0113] F Extrusion pressure

[0114] KGS Arrow (Cold Air Spraying)

[0115] R radial

Claims

1. A method of manufacturing an electric machine (50), wherein, Multiple stator ring segments (10) are close together and subsequently interconnected in the formation of a stator ring (20), characterized in that, - After the stator rings (20) are formed, a radially inward pressing force (F) is generated by a pressing device, which tangentially presses the stator ring segments (10) together. - Under the condition of mutual compression, an external coating is applied to the outer surface (13) of these stator ring segments (10) located on the radially outer side, the external coating forming a complete and integral outer covering layer (21) on the stator ring (20). - After applying the external coating, stop generating extrusion pressure (F) using the extrusion device, and - During coating, the extrusion force (F) generated by the extrusion device is thus completely or at least largely held by the outer cover layer (21), and the stator ring segments (10) are held tangentially pressed together by the integral outer cover layer (21). - The external coating is manufactured by cold air spraying, thermal spraying or welding for metallic materials.

2. The method of claim 1, wherein, After the external coating is applied, the coated stator ring (20) is machined on a lathe, wherein the diameter of the coated stator ring (20) is made to a preset nominal diameter and / or the surface of the external coating is made smooth.

3. The method of claim 1, wherein, The coated stator ring (20) is squeezed into the housing (60) of the machine (50), and the outer coating of the coated stator ring (20) is pressed against the inner wall (61) of the housing (60).

4. The method according to claim 1, characterized in that, - Auxiliary devices are integrated in at least one stator ring segment (10), and - Pressure or tension is applied radially to the auxiliary device by the extrusion device, the pressure or tension constituting the extrusion force (F) or at least contributing to the generation of the extrusion force.

5. The method according to claim 4, characterized in that, Auxiliary devices are integrated in all stator ring segments (10).

6. The method according to claim 4, characterized in that, - At least one auxiliary device is a track (110) that extends axially along a stator ring segment (10) to which it is associated and extends or protrudes axially at the axial end (E10) of the stator ring segment, and - Pressure or tension is applied radially to the axially projecting end section by the extrusion device, the pressure or tension constituting the extrusion force (F) or at least contributing to the generation of the extrusion force.

7. The method according to claim 1, characterized in that, - At least one stator ring segment (10) has a form-fitting member (15) located on the radially inner side. - A tensioning element is respectively installed on one or more shape-fitting parts (15), and - A tensile force is applied radially inward to the shape fit (15) by the extrusion device, the tensile force constituting the extrusion force (F) or at least contributing to the generation of the extrusion force.

8. The method according to claim 7, characterized in that, All stator ring segments (10) have a form fit (15) located on the radially inner side.

9. The method according to claim 7, characterized in that, The pulling element is designed in the form of a gripping tool (40).

10. The method according to claim 1, characterized in that, - To manufacture at least one stator ring segment (10), multiple stator ring segment plates (100) are stacked and pressed together. - The radially outer end faces (101) of these compressed stator ring segments (100) are coated with a segment cover layer (102) to form the radially outer segment cover layer (102) of the corresponding stator ring segment (10), and - The stator ring (20) is formed by one or more coated stator ring segments (10).

11. The method according to claim 10, characterized in that, - After applying the section cover layer (102), stop pressing the stator ring section plate (100), and - The section cover (102) thus retains mechanical force completely or at least mostly, which was applied during the application of the section cover (102) to press the multiple stator ring plate segments (100).

12. The method (10) according to claim 10, characterized in that, The section cover layer (102) of the stator ring segment (10) is manufactured by cold air spraying, thermal spraying and / or welding processes for metallic materials.

13. The method according to claim 10, characterized in that, After assembling multiple coated stator ring segments (10), the external coating is applied to the segment cover layer (102) of these stator ring segments (10), and the complete and integral external cover layer (21) of the stator ring (20) is disposed on the segment cover layer (102) of the multiple stator ring segments (10).

14. A motor (50) manufactured by the method of manufacturing a motor (50) according to any one of claims 1 to 13, having a plurality of stator ring segments (10) that are close to and interconnected with each other when forming a stator ring (20), characterized in that, These stator ring segments (10) are pressed together tangentially, i.e., pressed together tangentially by an external coating applied to the outer surface (13) of these stator ring segments (10), wherein the external coating is applied to the outer surface (13) by cold air spraying, thermal spraying process for metal materials or by welding, and the external coating forms a complete outer covering layer (21) on the stator ring (20).

15. The motor (50) according to claim 14, characterized in that, - These stator ring segments (10) each have multiple mutually pressed stator ring segment plates (100), and these stator ring segment plates are coated with a segment cover layer (102) on their radially outer end faces (101), and - The complete and integral outer cover layer (21) of the stator ring (20) is disposed on the section cover layer (102) of multiple stator ring segments (10).

16. The motor (50) according to claim 15, characterized in that, These sections of the cover layer (102) respectively maintain mechanical force along the axial direction (A) with reference to the rotation axis of the machine (50).

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