Stator for a generator of a wind turbine, generator of a wind turbine and wind turbine

Abstract

This invention relates to a stator for a generator used in a wind turbine, a generator for a wind turbine, and a wind turbine. The stator of a wind turbine, particularly a direct-drive generator, comprises: a stator segment including a lamination assembly and a stator support structure having a support structure segment extending axially and positioned adjacently circumferentially to form a ring structure. Each support structure segment includes a longitudinal carrier element extending axially and including a lamination attachment section on the stator segment side, the section having a through-hole for securing the carrier element to the corresponding stator segment using a lamination attachment assembly. The lamination attachment assembly for each carrier element includes: a counter-support element inserted into a cavity of the lamination assembly and extending along the axial length of the stator segment, including a threaded hole; a reinforcing rod disposed on the lamination attachment section within the carrier element, extending along the axial length of the support structure segment and including a through-hole; and a lamination fastening device fastened through aligned sets of through-holes and threaded holes.

Description

Technical Field

[0001] This invention relates to a stator for a generator, particularly a direct-drive generator, used in a wind turbine. The stator comprises: stator segments, each including a lamination stack; and a stator support structure having support structure segments extending axially and positioned adjacently in a circumferential direction to form a ring structure. Each support structure segment includes at least one longitudinal carrier element extending axially. The invention also relates to a generator having such a stator and a wind turbine having such a generator. Background Technology

[0002] To generate electrical power from rotational energy, wind turbines typically include a generator with a stator and a rotor. The rotor is coupled to a rotor hub, to which multiple blades are mounted, allowing wind energy to be converted into rotational mechanical energy. The resulting rotation of the rotor hub is then converted into the rotation of the generator's rotor. In direct-drive wind turbines, no gearbox is used, allowing the rotation of the rotor hub to be directly used as the rotation of the rotor.

[0003] The rotor of a generator includes magnets, particularly permanent magnets, such that the rotation of the magnets relative to the stator coils formed by the stator windings induces a current in the stator windings. Although configurations in which an inner rotor is surrounded by an outer stator have been proposed, it is common for the outer rotor to surround the inner stator. For example, a hollow shaft may be connected to a base frame in the nacelle, to which a stator support structure is mounted. This stator support structure may include two end plates, one on the driving end and one on the non-driving end.

[0004] Known stators are typically segmented; that is, for transportability reasons, the stator laminations are usually divided into stator segments, each of which comprises laminations defining stator teeth and carrying stator windings. In known designs, each stator segment, for example, covering an angle range of 45°, 30°, or even smaller, is attached to a corresponding support structure segment. These can then be mounted to end plates.

[0005] The stator support structure typically ensures not only the defined positioning of the stator segments relative to the rotor magnets but also prevents collisions between the stator and rotor, especially considering the strong radial and tangential electromagnetic forces generated during generator operation. Furthermore, the stator support structure prevents the segmented assemblies from exhibiting a uniform characteristic frequency in terms of electromagnetic excitation force frequencies. Finally, the stator support structure must withstand all load conditions of the generator, both in the long term and preferably throughout the generator's entire lifespan.

[0006] Various designs have been proposed in the prior art for securing stator segments to support structure segments. For example, welded and bolted connections between the lamination assemblies and support structure segments are known. In bolted designs, a large amount of material, complex plate bending, and complex welds are required to provide sufficient stiffness. For example, the support structure segment may include at least one carrier element to which the lamination assemblies of the stator segment are coupled. To provide sufficient stability, a large surface area is required in the attachment section of the carrier element on the stator side.

[0007] WO 2018 / 197057 A1 discloses a support structure segment for a generator in a wind turbine. Here, a curved profile is used as a carrier element. The carrier element includes a top segment, at least one side segment, and at least one base segment for connection to a lamination assembly. Specifically, the base segment, side segment, top segment, another side segment, and another base segment of the carrier element can describe an Ω (omega) shaped profile. These Ω profiles are typically connected by welding to internal and external tangential stiffeners, such as metal plates, of the profile. This significantly increases the complexity and cost of such a support structure segment. Furthermore, the extensive welding causes deformation of the support structure, resulting in high precision requirements. Various methods have been proposed for the connection between the support structure segment and the stator segment.

[0008] In most of these methods, a cavity is provided in the attachment region of the lamination assembly. A counter bearing element, comprising a threaded hole into which a bolt extending through the lamination attachment section of the carrier element can be screwed. An exemplary configuration is described, for example, in EP 3672 025 A1. Here, the cavity can be a slot into which a dovetail or crescent-shaped counter bearing element (rod) is axially inserted. Because the rod is wider than the opening of the cavity, the counter bearing element cannot be pulled out radially from the cavity. For example, a bolt / screw fastening device is used to pull the counter bearing element radially toward the carrier element, and thus secure the stator segment to the support structure segment.

[0009] In specific known designs, simple bolted joints with bolts, washers, and bolt extensions are used. Bolt extensions can be designed to structurally support the carrier element and lamination assembly, particularly providing better load transfer. In this way, local support is added to each individual bolt joint. However, the thickness of the carrier element should generally be chosen to be as low as possible to require less material and, in some cases, to allow for the formation of certain configurations, such as Ω-shaped configurations. However, the thickness of the carrier element between the bolt extension and the lamination assembly, particularly the lamination attachment section, is critical. If excessive material is machined away, local deflection of the carrier element or the supporting structural segment as a whole can lead to cracking. Summary of the Invention

[0010] One object of the present invention is to provide an improved method for coupling support structure segments to stator segments, which in particular allows for greater stability and cheaper production.

[0011] This objective is achieved by providing a stator, generator, and wind turbine according to embodiments of the invention. Advantageous embodiments are described in this disclosure.

[0012] In the stator as originally described, each carrier element includes a lamination attachment segment on the stator segment side, the lamination attachment segment having through holes for lamination fastening devices, particularly bolts and / or bolt extensions, for securing the carrier element to the corresponding stator segment using a lamination attachment assembly, the lamination attachment assembly for each carrier element comprising:

[0013] - A counter-support element to be inserted into the cavity of the lamination assembly and extending at least substantially over the entire axial length of the stator segment, the counter-support element including a threaded hole for receiving the lamination bolting device.

[0014] - A reinforcing rod to be placed on the lamination attachment segment within the carrier element, the reinforcing rod extending at least substantially along the entire axial length of the support structure segment and including a through hole for the lamination bolting device, and

[0015] - The lamination bolting device is bolted through aligned sets of through holes and threaded holes.

[0016] The bolted device should be understood as a bolt, bolt extender, or a combination of both. Specifically, the bolted device includes a threaded portion and a head, wherein the thread of the threaded portion of the lamination bolted device naturally matches a threaded hole, such that by screwing the bolted device into the threaded hole, the counter-support element can be radially pulled toward the carrier element. Thus, the stator segment is secured to the support structure segment. While it is conceivable that at least one through-hole is also threaded, preferably, the through-hole is unthreaded and only slightly larger than the diameter of the corresponding lamination bolted device. In particular, the through-hole through the reinforcing rod is smaller than the head of the lamination bolted device, such that the head rests directly or via a washer on the surface of the reinforcing rod. The carrier element is typically or has a configuration that defines an internal space, at least defined by the lamination attachment section, such that the reinforcing rod rests within the carrier element.

[0017] Note that the lamination attachment segments, lamination attachment assemblies, and lamination bolting devices are thus named because advantageous improvements regarding the connection between segments will also be discussed below, resulting in the optional provision of corresponding segment attachment segments, segment attachment devices, and segment bolting devices.

[0018] A reinforcing bar is proposed, specifically replacing each lamination bolt joint with a separate bolt extender. The reinforcing bar extends the entire length of the carrier element and has through holes for each lamination bolt assembly. Advantageously, the counter-support element, the reinforcing bar, and the lamination bolt assembly form a reinforcing structure that is at least substantially H-shaped, extending at least substantially the entire axial length of each support structure segment. The full-length reinforcing bar significantly increases the stiffness of the lamination bolt joint. Because all lamination bolt assemblies are structurally connected by the reinforcing bar, the reinforcing bar, bolt assembly, and counter-support element act as an H-shaped configuration providing substantial stiffness.

[0019] Due to the increased stiffness, the thickness requirements for machining carrier components, especially the lamination attachment sections, can be reduced. This is because the local reduction in thickness has a smaller impact on structural integrity, especially when H-shaped components provide support.

[0020] Additionally, it reduces handling and overall costs in production. Specifically, there is only one reinforcing bar instead of numerous bolt extensions. With one or two lamination bolts screwed in, the reinforcing bar is in place, and the rest of the assembly can be performed more quickly. Furthermore, producing a single standard reinforcing bar with a through hole is less expensive than producing a large number of bolt extensions with holes.

[0021] Generally, a stator preferably used as an internal stator comprises a lamination assembly structure divided into stator segments, each segment including laminations defining stator teeth and carrying stator windings, and a stator support structure typically formed by interconnected support structure segments attached to end plates, as known in the prior art. For example, each segment may cover an angle range of 45°, 30°, or less than 30°. As known in the art, the stator support structure thus allows for the defined positioning of the stator segments of the lamination assembly structure relative to the rotor's magnets and prevents collisions between the stator and rotor. In wind turbines, the stator support structure, particularly the drive end plates and non-drive end plates, may be mounted, for example, on a hollow shaft that can be connected to a base frame in the nacelle.

[0022] Preferably, the reinforcing rod may be made of metal, particularly steel. For example, the same material used for the carrier element may be used. Furthermore, the lamination attachment assembly may also include at least one lamination washer for each lamination fastening device and / or a total of 20-30, particularly 24-28, lamination fastening devices.

[0023] In a specific embodiment, the counter-support element can be tightly fitted into the cavity. For example, it can be axially introduced into the cavity during stator assembly. Preferably, each cavity may have an opening toward the corresponding lamination attachment segment, the opening having a circumferential extension smaller than the widest circumferential extension of the cavity. The counter-support element may have a tapered shape toward the lamination attachment segment. For example, a construction as described in EP 3 672 025 A1 can be used. For example, a crescent-shaped rod can be used as a counter-support element, thus being inserted into a cavity of a corresponding shape, the cavity having an opening toward the carrier element and therefore being a groove. In other embodiments, the counter-support element may also have a dovetail profile.

[0024] In a preferred embodiment, the integral carrier element may have a rectangular hollow profile, wherein an entry hole is provided for each lamination fastener in an entry section opposite to the lamination attachment section. In this case, a single-piece rectangular configuration is used, which is extremely stable, provides a large surface area with the lamination attachment section, and is readily commercially available, further reducing costs. Standard, known rectangular configurations can be cut along their length to produce a stable carrier element.

[0025] It should be noted that in most embodiments, the support structure segment will include more than one carrier element because the stator segment and similar support structure segments typically span an angular range of, for example, 30° to 60° in the circumferential direction. For example, a support structure segment may include three to seven carrier elements or even more. The carrier elements typically span at least the axial length between at least two pressure plates configured to directly or indirectly pressurize the lamination assembly (the stack of laminations) and extend in the circumferential direction. These pressure plates, to which the carrier elements are typically fixed, for example by welding, may have served as lateral reinforcements, thereby improving the stability of the entire support structure segment.

[0026] Generally, the directions mentioned in this specification refer to the generator and its axis of rotation. The axial direction is parallel to the generator's axis of rotation, the radial direction is perpendicular to the axial direction toward or from the axis of rotation, and the circumferential direction is perpendicular to both the radial and axial directions.

[0027] As already mentioned, the support structure segment preferably includes a pressure plate at each axial end of the support structure segment, wherein the at least one carrier element may preferably extend beyond the corresponding pressure plate in the axial direction. In this way, as is known in principle in the art, the extended carrier element is adapted to carry the entire stator segment, and in particular also the overhang, regardless of the distance between the pressure plates.

[0028] As is known in the art, support structure segments are connected to each other in the circumferential direction to form a ring structure, which can then be mounted to an end plate to provide a complete stator support structure. Methods described in the prior art for attaching two adjacent support structure segments together can also be used in this invention. However, these known designs lack stiffness in the joints between segments. For example, the carrier element can be made of 10-12 mm thick plates, which can be shaped to provide the desired configuration, such as an Ω configuration, as already described. In other embodiments, as mentioned above, the carrier element can also be made of pre-formed configurations with such thickness, such as rectangular configurations. To achieve the required stiffness, thicker material will be needed in the corresponding segment attachment sections. To compensate for the lack of stiffness in known methods, different clamps and connecting plates have been added to the carrier element. However, such solutions are not very efficient and offer a poor cost / material ratio compared to the gains in stiffness.

[0029] In view of these problems, a particularly preferred embodiment of the invention is disclosed, wherein at least one carrier element on the circumferential side of a support structure segment includes a segment attachment segment having a through hole for segment fastening devices, particularly bolts and / or bolt extensions, for securing the segment attachment segment to a corresponding segment attachment segment of a circumferentially adjacent support structure segment using a segment attachment assembly. The embodiment proposes a segment attachment assembly for segment-to-segment connections comprising:

[0030] - A reinforcing plate placed between two segmental attachment sections, the reinforcing plate extending at least substantially along the entire axial length of the support structure segment, and including through holes for the segmental bolting device.

[0031] - The segmental bolting device, which is bolted through aligned sets of through holes, and

[0032] - A nut, which is opposite to the segment attachment section, fixes the segment bolting device on the non-reinforcing plate side of the segment attachment section, and the head of the segment bolting device rests against the segment attachment section.

[0033] Therefore, it is proposed to add a structural stiffening plate between the two segmental attachment sections as part of the bolted joint in the segment-to-segment connection. Since multiple bolts, such as 4 to 10, particularly 6 or 7, are used for segmental bolting, all for securing the same stiffening plate, the stiffness in this area is significantly increased. In particular, the stiffening plate installed in the segment-to-segment connection can be designed to precisely provide the desired stiffness that would be lacking due to the small thickness of the segmental attachment section of the carrier element. In other words, the stiffening plate can be thicker or thinner, depending on structural requirements. All other areas supporting the structural segment do not require reinforcement beyond what is provided by the configuration of the carrier element, allowing all carrier elements on the circumferential extension of the supporting structural segment to be manufactured with the same thickness. Regarding the segment-to-segment connection, in the absence of stiffness, a stiffening plate is used to provide additional stiffness. This prevents the addition of material to other areas of the supporting structural segment.

[0034] Note that, independent of the reinforcing bars proposed for the lamination attachment assembly, the use of such reinforcing plates is also advantageous. In other words, a stator support structure for the stator of a wind turbine generator, particularly a direct-drive generator, is conceivable. This stator support structure includes two end plates and rings of support structure segments. Each support structure segment includes at least one longitudinal carrier element extending axially and includes a stator-side attachment segment for securing the carrier element to a stator segment of the stator. At each circumferential side of the support structure segment, the corresponding carrier element includes a segment attachment segment having through holes for segment bolting devices, particularly bolts and / or bolt extensions, for securing the segment attachment segment to a corresponding segment attachment segment of a circumferentially adjacent support structure segment using a segment attachment assembly. The segment attachment assembly for segment-to-segment connections includes:

[0035] - A reinforcing plate placed between two segmental attachment sections, the reinforcing plate extending at least substantially along the entire axial length of the support structure segment, and including through holes for the segmental bolting device.

[0036] - The segmental bolting device, which is bolted through aligned sets of through holes, and

[0037] - A nut, which is opposite to the segmental attachment segment, secures the segmental bolting device to the non-reinforcing plate side of the segmental attachment segment, the head of the segmental bolting device resting against the segmental attachment segment. Also in this case, preferably, the integral carrier element may have a rectangular hollow profile.

[0038] In a particularly preferred embodiment regarding the segment-to-segment connection, the segment attachment assembly may further include a bushing surrounding the segment bolting device as a spacer between a reinforcing plate whose surface directly or, particularly indirectly, abuts one of the segment attachment segments via washers, and another segment attachment segment. This bushing is screwed into a threaded through-hole in the reinforcing plate to adjust for the distance between the two support structure segments. Thus, the segment attachment assembly may also include a bushing that also functions as a spacer, since the segment-to-segment distance may vary. According to this embodiment, the bushing, which also functions as an adjustable spacer, is not screwed into one of the segments but into the reinforcing plate, thereby ensuring that the reinforcing plate also functions in the segment-to-segment joint. This is achieved by mounting the bushing in the threads of the reinforcing plate, such that before tightening the segment bolting device, the bushing can be screwed toward the opposing support structure segment to eliminate the gap between the two segments. Since the bushing contacts the reinforcing plate and one of the segment attachment sections, all loads will pass through the reinforcing plate, thus enabling it to function.

[0039] As already mentioned, due to the reinforcement plate, the thickness of the material in the segmental attachment section does not need to be increased, so that the segmental attachment section can have a material thickness equal to the material thickness of the rest of the carrier element. In particular, each carrier element along the circumferential direction of the support structure segment, whether or not it is an end carrier element, can be similar or even equivalent.

[0040] Preferably, at least one access opening may be provided in a segment of the carrier element opposite to the segment attachment segment. Similar to the access hole for the laminate attachment assembly, an access opening may also be provided for the segment attachment assembly.

[0041] As has been discussed regarding laminated attachment assemblies, washers and / or other additional components may also be provided for segmental attachment assemblies. In some embodiments, it may be advantageous to use a combination of bolt extenders and bolts to provide further reinforcement inside the carrier element.

[0042] The present invention also relates to a wind turbine generator comprising a stator according to the invention. Furthermore, the wind turbine according to the invention comprises a generator according to the invention. Preferably, such a generator is a direct-drive generator having an inner stator and an outer rotor according to the invention. As described above, the stator support structure may further comprise two end plates to which a stator support segment is annularly attached, the end plates being, for example, mounted to a hollow shaft, which in turn may be mounted to a base frame of the nacelle. The stator typically also includes stator segments and corresponding stator windings. All features and comments regarding the stator are accordingly applicable to the wind turbine generator and wind turbine according to the invention. Attached Figure Description

[0043] Other objects and features of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings. However, the drawings are merely schematic diagrams designed for illustrative purposes only and do not limit the invention. The drawings show:

[0044] Figure 1 A schematic cross-sectional view of a wind turbine according to the present invention.

[0045] Figure 2 : Figure 1 A schematic cross-sectional view of the generator of a wind turbine.

[0046] Figure 3 : The corresponding upper view of the supporting structural element,

[0047] Figure 4 A schematic partial sectional view of the area connecting segments.

[0048] Figure 5 : Figure 4Sectional view of the area, and

[0049] Figure 6 A perspective view of the connections between segments. Detailed Implementation

[0050] Figure 1 This is a schematic diagram of a wind turbine 1 according to the present invention. The wind turbine 1 is a direct-drive wind turbine that can be used in onshore and offshore applications. The wind turbine 1 includes a rotor hub 2, to which multiple rotor blades 3, for example, three blades 3, are mounted. The rotational motion of the rotor hub 2 generated by the wind blades 3 is directly transmitted to the rotor 4 of the generator 5, wherein the rotor 4 includes at least one permanent magnet ( Figure 1 (not shown in the diagram), and can be rotated relative to the stator 6 according to the invention via a bearing 7 on the hollow shaft 8. The hollow shaft 8 extends into the nacelle 9, which is mounted only in Figure 1 The hollow shaft 8 can be mounted on the base frame of the nacelle 9, as shown in the diagram.

[0051] In the depicted embodiment, an inner stator 6 and an outer rotor 4 configuration is used, wherein the stator 6 and rotor 4 are radially spaced apart by an air gap 11. Figure 1 The axial direction 12 and radial direction 14 along the rotation axis 13 are indicated.

[0052] exist Figure 2 The diagram shows a schematic cross-sectional view of generator 5, with the circumferential direction 15 also indicated. As can be seen, multiple permanent magnets 16 are arranged on the stator-facing side of rotor 4. Stator 6 includes multiple stator segments 17, each of which includes a lamination group, i.e., a stack of laminations, to which stator windings forming stator coils are mounted. In this example, eight stator segments 17 are used. The stator windings do indeed face the permanent magnets 16 through an air gap 11, such that current is induced in the stator coils formed by the stator windings as rotor 4 moves relative to stator 6.

[0053] The stator 6 is mounted on the hollow shaft 8 via a stator support structure 18, which includes end plates (not shown) on the non-drive end side and the drive end side. Each stator segment 17 is supported on a separate support structure segment 19. The support structure segments 19 are coupled to the stator segments 17 via lamination attachment devices, and the support structure segments 19 are coupled to each other via segment attachment assemblies, as described below. Figure 4 and Figure 5 Further details are provided.

[0054] Figure 3An embodiment of a support structure segment 19 is shown, comprising a plurality of carrier elements 21 extending in the axial direction 12. In this example, these carrier elements are made of an integral rectangular hollow metal configuration and are connected, in this case, by a pressure plate 22 at the axial ends of the support structure segment 19 and a stabilizing plate 23 serving as a lateral reinforcement, by welding. As can be seen, the carrier elements 21 protrude above the pressure plate 22, thereby forming protrusions 20, which may also be referred to as overhangs.

[0055] The support structure segment 19 also includes a through hole 24 on at least one circumferential side surface of the support structure segment 19 for connecting adjacent support structure segments 19 in a manner shown below. On the top of the carrier element 21, through holes 27 are provided in the stator-side lamination attachment section 26 of each carrier element 21 for securing the stator segment 17, in particular its lamination assembly, to the lamination bolting device of the corresponding carrier element 21.

[0056] Figure 4 and Figure 5 The connection and the connections between segments are shown in detail.

[0057] Regarding the attachment of the support structure segment 19 to the corresponding stator segment 17, the stator segment 17 includes a cavity, in this case a slot, in its lamination assembly 28, having an opening toward the radially inward side. An anti-support element 29, in this case a crescent-shaped rod, is axially inserted into this cavity. This crescent-shaped rod includes a threaded hole 30 aligned with a through-hole 27 of the lamination attachment segment 26 of the carrier element 21. A reinforcing rod 31 is placed on the radially inward side of the lamination attachment segment 26, extending along the entire axial side of the carrier element 21. The reinforcing rod 31 also has a through-hole 32 aligned with the through-hole 27 and the threaded hole 30.

[0058] In this way, the lamination bolting device 46, in this case a simple bolt 33, can be inserted through the through holes 32, 27 and screwed into the threaded hole 30 to pull the counter-support element 29 toward the carrier element 21 and to fix the reinforcing rod 31 between the head of the bolt 33 and the lamination attachment section 26. Because the opening of the cavity in the lamination assembly 28 is smaller than the circumferential extension of the counter-support element 29, a strong attachment is achieved. For example, particularly from... Figure 5As can be seen, the full-length reinforcing rod 31, which can be understood as a "rod bolt extender," significantly increases the stiffness of the laminated attachment joint. The reinforcing rod 31, the counter-support element 29, and the bolts 33 form an H-shaped configuration, thereby providing great structural stability, particularly stiffness, even though the thickness of the material in the laminated attachment segment 26, which is equal to the thickness of the material of the entire carrier element 21, is only selected to meet the mechanical stability requirements of the carrier element 21. Even local reductions in thickness can be considered, as this has a relatively small impact on structural integrity when the H-shaped configuration provides support. In this embodiment, for example, 24-28 bolts can be used along the axial length of each carrier element 21.

[0059] Note that a washer 34 may be added if convenient.

[0060] Regarding the segment-to-segment connection, as can be seen, a reinforcing plate 35 is positioned between two segment attachment segments 25 of the outermost carrier element 21 having a through hole 24. The reinforcing plate 35 also provides a through hole 36, which in this case is threaded to receive a bushing 37, which also serves as an adjustable spacer depending on how far it is screwed into the reinforcing plate 35. The bushing 37 surrounds a segment bolting device 38, in this case also a bolt 39, which extends through the through hole 24 and the internal space of the bushing 37 into the opposing carrier element 21, where it is fastened using a nut 40. Of course, in the same case, a washer 41 may be used where appropriate, for example as a spacer for the reinforcing plate 35, where it may also provide a corresponding protrusion for either the reinforcing plate 35 or the segment attachment segment 25.

[0061] The reinforcing plate 35 also extends along the entire length of the corresponding carrier element 21, and therefore, along the entire length of the support structure segment 19, such as, for example, in... Figure 6 This is seen in the perspective view.

[0062] As in Figure 5 As can be seen, sections 42 and 43, which are opposite to the corresponding attachment sections 25 and 26, may be provided with access holes 44 or access openings 45 to use appropriate tools to tighten bolts 33 and 39.

[0063] Although the invention has been described in detail with reference to preferred embodiments, the invention is not limited to the disclosed examples, and other variations can be derived by those skilled in the art from the disclosed examples without departing from the scope of the invention.

Claims

1. A stator (6) for a generator (5) for a wind turbine (1), comprising: Stator segments (17), each of which includes a stacked assembly (28); And a stator support structure (18) having support structure segments (19) extending in an axial direction (12) and positioned adjacently in a circumferential direction (15) to form a ring structure, wherein each support structure segment (19) includes at least one longitudinal carrier element (21) extending in an axial direction (12) and including a lamination attachment segment (26) on the stator segment side, the lamination attachment segment (26) having a first through hole (27) for a lamination fastening device (46) for securing the carrier element (21) to the corresponding stator segment (17) using a lamination attachment assembly, wherein the lamination attachment assembly for each carrier element (21) includes: - A counter-support element (29) to be inserted into the cavity of the lamination assembly (28) and extending at least along the entire axial length of the stator segment (17), the counter-support element (29) including a threaded hole (30) for receiving the lamination bolting device (46). - A reinforcing rod (31) to be placed on the lamination attachment section (26) within the carrier element (21), the reinforcing rod (31) extending at least along the entire axial length of the support structure section (19) and including a second through hole (32) for the lamination bolting device (46), and - The laminated bolting device (46) is bolted through aligned sets of first and second through holes (27, 32) and threaded holes (30).

2. The stator according to claim 1, characterized in that, The counter-support element (29), the reinforcing rod (31), and the laminated bolting device (46) form an H-shaped reinforcing structure that extends at least along the entire axial length of each support structure segment (19).

3. The stator according to claim 1 or 2, characterized in that, The reinforcing rod (31) is made of metal.

4. The stator according to claim 3, characterized in that, The reinforcing rod (31) is made of steel.

5. The stator according to claim 1 or 2, characterized in that, The lamination attachment assembly also includes at least one lamination washer (34) for each lamination fastening device (46).

6. The stator according to claim 1 or 2, characterized in that, The lamination attachment assembly also includes lamination washers (34) for a total of 20 to 30 lamination fastening devices (46).

7. The stator according to claim 6, characterized in that, The lamination attachment assembly includes lamination washers (34) for a total of 24 to 28 lamination fastening devices (46).

8. The stator according to claim 1 or 2, characterized in that, The anti-support element (29) is tightly fitted into the cavity.

9. The stator according to claim 1 or 2, characterized in that, Each cavity has an opening toward the corresponding lamination attachment segment (26), the opening having a circumferential extension smaller than the widest circumferential extension of the cavity.

10. The stator according to claim 1 or 2, characterized in that, The anti-support element (29) has a tapered shape toward the lamination attachment section (26).

11. The stator according to claim 8, characterized in that, The anti-support element (29) has a dovetail profile or is a crescent-shaped rod.

12. The stator according to claim 1 or 2, characterized in that, The integral carrier element (21) has a rectangular hollow profile, wherein an entry hole (44) is provided for each lamination fastening device (46) in the entry section (42) opposite to the lamination attachment section (26).

13. The stator according to claim 1 or 2, characterized in that, The carrier element (21) located at least on the circumferential side of the support structure segment (19) includes a segment attachment segment (25) having a third through hole (24) for a segment fastening device (38) for securing the segment attachment segment (25) to a corresponding segment attachment segment (25) of a circumferentially adjacent support structure segment (19) using a segment attachment assembly, wherein the segment attachment assembly for segment-to-segment connection includes: - A reinforcing plate (35) is placed between the two segment attachment sections (25), the reinforcing plate (35) extending at least along the entire axial length of the support structure section (19), and including a fourth through hole (36) for the segment bolting device (38). - The segmental bolting device (38) is bolted through aligned sets of third and fourth through holes (24, 36), and - A nut (40) is used to fix the segment bolting device (38) on the non-reinforcing plate side of the segment attachment section (25) opposite to the segment attachment section (25), with the head of the segment bolting device (38) resting against the segment attachment section (25).

14. The stator according to claim 13, characterized in that, The segmental bolting device (38) is a first bolt (39) and / or a first bolt extension.

15. The stator according to claim 13, characterized in that, The segmental attachment assembly also includes a bushing (37) surrounding the segmental bolting device (38), serving as a spacer between a reinforcing plate (35) directly or indirectly adjacent to the surface of one of the segmental attachment segments (25) and the other segmental attachment segment (25), wherein the bushing (37) is screwed into a threaded fourth through hole (36) of the reinforcing plate (35) to adjust to accommodate the distance between the two support structure segments (19).

16. The stator according to claim 13, characterized in that, The material thickness of the segment attachment section (25) is equal to the material thickness of the rest of the carrier element (21) excluding the segment attachment section (25).

17. The stator according to claim 13, characterized in that, At least one access opening (45) is provided in a segment (43) of the carrier element (21) opposite to the segment attachment segment (25).

18. The stator according to claim 13, characterized in that, The segment attachment assembly includes at least one washer (41) for the segment bolting device (38).

19. The stator according to claim 18, characterized in that, The segmental attachment assembly includes washers (41) for 4 to 10 segmental bolting devices (38).

20. The stator according to claim 19, characterized in that, The segmental attachment assembly includes washers (41) for six or seven segmental bolting devices (38).

21. The stator according to claim 1, characterized in that, The generator (5) is a direct-drive generator.

22. The stator according to claim 1, characterized in that, The laminated bolting device (46) is a second bolt (33) and / or a second bolt extender.

23. A wind turbine generator (5) comprising a stator (6) according to any one of claims 1 to 22.

24. A wind turbine (1) comprising a wind turbine generator (5) according to claim 23.

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