Method for producing a power-generating component of a rotary electric machine, and rotary electric machine having a power-generating component

Abstract

Proposed is a method for producing a power-generating component of a rotary electric machine, in which method: a body (10) of a power-generating component (1), having a plurality of slots (20) arranged along a circumference, and preformed insulating paper elements (30) are provided, wherein each insulating paper element (30) has two mutually opposite wall portions (41, 42) and has a connecting portion (50) which has a curved profile in the provided preformed insulating paper element (30) such that a spacing (A) between the wall portions (41, 42) at the points of connection of the wall portions (41, 42) to the connecting portion (50) is less than the length (Lv) of the curved connecting portion (50); preformed insulating paper elements (30) are inserted into slots (20) in such a way that some portions of the insulating paper elements (30) protrude axially out of the slots (20); and conductor elements (60) of windings of the power-generating component (1) are arranged in the slots (20), wherein a bending portion (61) of at least one conductor element (60) is arranged along a circumferential direction (11) of the power-generating component (1) in an associated slot (20) in such a way that the bending portion increases the spacing of one wall portion of the insulating paper element to the other wall portion of the insulating paper element, with the connecting portion of the insulating paper element being stretched in the process.

Description

[0001] Method for producing a power-generating component of an electric rotary machine and electric rotary machine with power-generating component

[0002] The invention relates to a method for producing a power-generating component of an electric rotary machine and to an electric rotary machine having at least one power-generating component produced according to the method for producing a power-generating component.

[0003] The electric drive train is well known in the art. It consists of components for energy storage, energy conversion, and energy transmission. The energy conversion components include electric machines. Electric rotating machines comprise a rotor and a stator as electrical power components.

[0004] Electric rotating machines can be designed as radial flux machines or as axial flux machines.

[0005] These machines typically have teeth on the stator around which the windings of at least one conductor element are guided in slots between the teeth.

[0006] The conductor elements in the slots can be positioned as separate linear elements in the slots and then connected to each other via connecting elements outside the slots, whereby the connecting elements form the so-called winding head on a respective axial side.

[0007] The conductor elements in the slots are usually insulated from the stator by an insulating paper element, in addition to the surrounding insulation. This insulating paper element, folded in one or more layers if necessary, is inserted into the stator slots.

[0008] A common embodiment provides for the insulating paper element to be arranged in a slot in such a way that the insulating paper element protrudes from the slot, radially outward, radially inward, or on the axial sides of the respective slot, also to meet the requirement that the insulating paper element protrude, for example, 1.5 mm or 3 mm beyond the stator in order to maintain clearance and creepage distances. It is not excluded that the insulating paper element is widened in the protruding area to prevent it from falling out of the slot or to provide an insertion bevel for the respective conductor element.

[0009] However, due to the nature of the insulating paper element's material, expansion can pose the problem that it has low elasticity and is prone to breakage in areas subject to greater mechanical stress. To prevent such breakage, it is necessary to prevent any stress from being applied to the section of the insulating paper element that protrudes from the slot. This makes it necessary to arrange or form the winding head or bending sections on the conductor elements relatively far away from the stator body, with the associated disadvantage of requiring additional axial space.

[0010] Based on this, the present invention is based on the object of providing a method for producing a power-generating component of an electric rotary machine and an electric rotary machine with at least one power-generating component produced according to the method for producing a power-generating component, which make it possible to design the power-generating component with a small axial installation space requirement.

[0011] This object is achieved by the method for producing a power-generating component of an electric rotary machine according to claim 1 and by the electric rotary machine according to claim 10. Advantageous embodiments of the method for producing a power-generating component of an electric rotary machine are specified in subclaims 2 to 9.

[0012] The features of the claims may be combined in any technically reasonable manner, whereby the explanations from the following description as well as features from the figures may also be considered, which comprise additional embodiments of the invention. In the context of the present invention, the terms "radial," "axial," and "circumferential direction" always refer to the axis of rotation of a rotor of the electric rotary machine equipped with the power-generating component.

[0013] The invention relates to a method for producing a power-generating component of an electrical rotary machine, in which a body of a power-generating component is provided with a plurality of grooves arranged along a circumference and preformed insulating paper elements are provided, wherein a respective insulating paper element has two opposing wall sections and a connecting section which, in the provided, preformed insulating paper element, has a curved profile such that a distance between the wall sections at the points of connection of the wall sections to the connecting section is less than the length of the curved connecting section. The preformed insulating paper elements are inserted into grooves such that the insulating paper elements protrude axially from the grooves in sections.Furthermore, conductor elements of windings of the power-generating component are arranged in the slots, wherein in a respective slot in which an insulating paper element has been arranged, a bent section of at least one conductor element is arranged or designed along a circumferential direction of the power-generating component such that the bent section increases the distance of one wall section of the insulating paper element from the respective other wall section of the insulating paper element and in the process, the connecting section of the insulating paper element is stretched.

[0014] The extension of the connecting section, or the increase in the distance between one wall section of the insulating paper element and the other wall section of the insulating paper element, thus occurs outside the groove. The connecting section of the insulating paper element outside the groove is thus longer than the distance between the wall sections in the groove.

[0015] The power-generating component can be a stator or rotor, namely of a radial flux machine or an axial flux machine. The body of the power-generating component can, for example, be a stack of electrical sheets composed of several electrical sheets, or another body containing iron.

[0016] The grooves can be radially or axially extending, depending on the type of magnetic flux of the electric rotating machine for which the power-generating component is intended.

[0017] The wall sections are designed to rest on the inner walls of the groove, whereby the wall sections are essentially two-dimensional, except for their own material thickness.

[0018] The curved course of the connecting section or the pre-formation of the insulating paper element can, for example, be a fold or a bend of the insulating paper element.

[0019] Due to the mechanical connection of conductor elements in several slots, the conductor elements are fixed in relation to each other, and accordingly their bending sections are also fixed in relation to each other.

[0020] In this case, several conductor elements can press their bent sections alternately against the wall sections of the insulating paper element, causing both wall sections of the insulating paper element to be pushed apart, with a corresponding stretching of the connecting section. The connecting section can be transformed from a three-dimensional folded or corrugated shape into a nearly two-dimensional shape.

[0021] Each connecting section thus represents a flexible area that allows the insulation paper element to be widened or adapted to the bending radius of the conductor element.

[0022] This in turn means that the material of the insulation paper element does not need to be stretched or does not break.

[0023] In an advantageous embodiment, the connecting region is located on the radially inner side of a slot of a stator of a radial flux machine. Here, the slot is typically open on the radially inner side, so that sufficient space is available for the arrangement of the three-dimensional structure of the connecting region before the force is applied by the bent sections of the conductor elements.

[0024] However, it should not be ruled out that the or a connecting area is located on the radially opposite side, i.e. on the radially outer side of the slot of the stator of a radial flux machine.

[0025] Because tearing or breakage of the insulating paper element can be prevented, it is possible to arrange the bent sections of the conductor elements axially closer to the slots, and thus to arrange the welds and / or winding heads there axially closer to the slots, so that the correspondingly designed power-generating component requires less axial space. At the same time, this reduces the material required for the conductor elements while maintaining the efficiency of an electrical rotary machine equipped with the power-generating component. In an alternative embodiment, it is possible to slightly extend the body of the power-generating component having the slots axially, while maintaining the same axial space requirement, thereby increasing the efficiency.

[0026] The insulation paper element can comprise, or be made from, a calendered, aromatic polyamide fibrid flake composition. The insulation paper element does not necessarily have to contain fibers of plant origin, as is the case with conventional paper.

[0027] In an advantageous embodiment of the method for producing a power-generating component, it is provided that the length of the connecting section Lv is related to the distance A between the wall sections at the points of connection of the wall sections with the connecting section in the groove in the following ratio: Lv = 1.1 ... 1.5*A.

[0028] The distance corresponds to the width of the groove at the position of the connecting section when the insulating paper element is inserted into the groove. In an advantageous embodiment, the length of the connecting section is up to 25% greater than the distance between the wall sections at the points where the wall sections connect to the connecting section in the groove.

[0029] The conductor element can be arranged in the groove such that a distance of the bending section of the conductor element to the groove is less than 1 / 10 of the thickness of the conductor element in the bending section.

[0030] This distance is to be measured from the beginning of the bending section facing the groove to the groove.

[0031] The beginning of the bending section or the wire bend may have a distance of 0 mm from the groove.

[0032] The bending radius can therefore begin at the height of the laminated core. The protruding insulation paper element is positioned entirely within the bend area.

[0033] The distance of the beginning of the bending section in relation to the groove can be adjusted by an appropriately used tool around which the conductor element is bent to create the bending section.

[0034] Furthermore, the insulating paper element can be arranged in the groove such that the section of the insulating paper element protruding from the groove has a length that is at least as great as the thickness of the conductor element in its bent section.

[0035] The thickness of the conductor element here refers to the largest geometric dimension of the conductor element in its cross-section in the length section covered by the insulation paper element.

[0036] This protruding length serves to maintain the required clearance and creepage distances. Despite the protruding length of the insulating paper element, the flexible connecting section prevents any cracks or breaks in the insulating paper element in the contact area at the bent sections. A further advantageous embodiment provides that at least one groove has a widening in an area covered by a bent section compared to a central area of ​​the groove.

[0037] A central area of ​​the slot is the area where the slot extends into the body of the power-generating component. The widening, however, is located in an area covered by a bent section and thus in an end area of ​​the slot. In the stator of a radial flux machine, this end area is located on an axial side of the stator body.

[0038] Insofar as the widening is always only realized on the side of the groove on which the groove is covered by a bending section, several widenings may be arranged on only one side of the groove, depending on the arrangement of the bending sections.

[0039] When the conductor elements are led out of the grooves alternately, a zigzag pattern is created.

[0040] For manufacturing purposes, the power-generating component also includes a widened portion along the circumferential direction, opposite the widened portion covered by the bent portion. In this embodiment, the groove is thus widened along both sides of the circumference. This widened portion can be symmetrical.

[0041] The width of each expansion can be relatively small, for example, between 1 / 10 and 1 / 5 of the thickness of the conductor element in the bending section located at the respective expansion. Thus, the expansion gradually adapts the groove at its end to the shape of the conductor element in its bending section.

[0042] The widening makes it possible to carry out the bending section partially in the slot, so that the overall axial length of the conductor elements and consequently of the entire winding package can be further reduced.

[0043] At least one insulating paper element used can have a tab on each of the two opposing wall sections, which overlap when the insulating paper element is arranged in the groove and which move relative to each other when force is applied by the bent sections of the conductor elements. The tabs are arranged on the side of the insulating paper element facing away from the connection area.

[0044] When the insulating paper element is arranged in a slot of a stator of a radial flux machine such that the connecting region is located on the radially inner side of the slot, it is accordingly provided that the overlapping tabs are located on the radial outer side of the slot, at which the slot is usually closed.

[0045] Due to the ability of the tabs to move relative to one another, it is also ensured at this point that the wall sections of the insulating paper element can move away from one another when force is applied by the conductor elements or their bending sections, without this necessarily leading to an overload of the insulating paper element and consequently to a breakage or tear of the insulating paper element.

[0046] The tabs may be designed in such a way that they continue to overlap in sections even when pushed apart in order to provide sufficient insulation against the groove.

[0047] The insulation paper for each groove is one element, comprising the wall sections as well as the connecting section and, if applicable, the tabs.

[0048] The connecting section may be curved outwards in relation to the groove before the distance between the wall sections is increased.

[0049] This means that in this embodiment the curvature of the connecting section does not lead towards the cavity of the groove, but in the opposite direction.

[0050] In the case of a stator of a radial flux machine, this means that when the connecting section is arranged on the radially inner side of the stator or the slots arranged there, the curvature of the connecting section leads even further radially inward than the slot itself.

[0051] Here, the curvature of the connecting section can be arranged in a gap associated with the groove. In one embodiment, the connecting section has exactly two inflection points in its curvature between the two wall sections before the distance between the wall sections is increased.

[0052] For example, the connecting section can be designed such that it initially has a concave profile relative to the groove, then transitions into a convex profile at a first inflection point, and then transitions into a concave profile again at a second inflection point. Thus, the connecting section with the convex profile can form a V-shaped projection that extends away from the groove.

[0053] It is not excluded that the connecting section initially has a convex profile starting from the groove, then transitions into a concave profile at a first inflection point, then transitions into a convex profile at a second inflection point, and again transitions into a concave profile at a third inflection point. With an axially symmetrical design of the connecting section, the connecting section with the second-mentioned convex profile can form a V-shaped projection that extends away from the groove, with a fourth inflection point being present between the V-shaped projection and the opposite side of the groove in accordance with the symmetry.

[0054] In an alternative embodiment, the connecting section can initially have a convex profile relative to the groove, which transitions into a concave profile at a first inflection point, which in turn then transitions into a convex profile at a second inflection point. Thus, the connecting section forms a concave profile that extends toward the groove.

[0055] A further advantageous embodiment provides that the connecting section has more than two turning points in its curvature between the two wall sections before the distance between the wall sections is increased.

[0056] In this embodiment, the connecting section can, for example, have a wave-shaped profile. The thickness of the insulating paper element Dip can be in the following ratio to the thickness of the conductor element DI, which is to be or is partially surrounded by the insulating paper element: Dip < DI / 10.

[0057] Another aspect of the present invention is an electric rotary machine comprising at least one power-generating component manufactured according to the described method for manufacturing a power-generating component.

[0058] This power-generating component can be, for example, a stator or a rotor of the electric rotating machine.

[0059] The invention described above will be explained in detail below against the relevant technical background with reference to the accompanying drawings, which show preferred embodiments. The invention is in no way limited by the purely schematic drawings, and it should be noted that the embodiments shown in the drawings are not limited to the dimensions shown. It is shown in

[0060] Figure 1 : a conventional stator of a radial flux machine in perspective view,

[0061] Figure 2: the conventional stator of a radial flux machine in side view, Figure 3: a part of a body of a conventional stator of a

[0062] Radial flux machine with inserted insulating paper element,

[0063] Figure 4: a partial area of ​​a body of a stator of a radial flux machine designed according to the invention with an inserted insulating paper element in a first embodiment,

[0064] Figure 5: a partial area of ​​a body of a stator of a radial flux machine designed according to the invention with an inserted insulating paper element in a second embodiment,

[0065] Figure 6: a partial area of ​​a body of a stator of a radial flux machine designed according to the invention with an inserted insulating paper element in a third embodiment, Figure 7: a partial area of ​​a body of a stator of a radial flux machine designed according to the invention with an inserted insulating paper element in a fourth embodiment,

[0066] Figure 8: a partial area of ​​a conventional winding head in side view, Figure 9: a partial area of ​​a winding head designed according to the invention in side view,

[0067] Figure 10: a partial area of ​​a body of a stator of a radial flux machine designed according to the invention with an inserted insulating paper element in the first embodiment with an axial stop,

[0068] Figure 11 : the insulation paper element before being arranged in the groove,

[0069] Figure 12: a section of a conventionally designed stator of a radial flux machine in side view,

[0070] Figure 13: a section of a stator of a radial flux machine designed according to the invention in a side view,

[0071] Figure 14: an axial end region of a first embodiment of a stator of a radial flux machine designed according to the invention in a side view,

[0072] Figure 15: an axial end region of a second embodiment of a stator of a radial flux machine designed according to the invention in a side view,

[0073] Figure 16: a section of a body of a stator of a radial flux machine shown in Figure 15 according to the second embodiment, Figure 17: a section of a conventionally designed stator of a radial flux machine in a side view, and

[0074] Figure 18: a section of a stator of a radial flux machine designed according to the invention in a side view.

[0075] To explain the power-generating component according to the invention, reference is first made to the electrical power-generating component 1 shown in Figures 1 and 2 in the form of a stator of a radial flux machine. This power-generating component 1 comprises a body 10, which can be composed, for example, of a plurality of electrical sheets. The body 10 is essentially hollow-cylindrical in shape and has a plurality of grooves 20 arranged on its radial inner side along a circumferential direction 11.

[0076] As can be seen in particular from Figure 2, a winding head 63 extends on each side of the body 10 and is connected to conductor elements 60 which run through the grooves 20 in the body 10.

[0077] Figure 3 shows an axial view of a portion of a body 10 of a conventional stator of a radial flux machine with an insulating paper element 30 inserted into a slot 20 in the body 10. It can be seen here that the slot 20 forms a radially inner opening 21 in its radially inner region. Furthermore, it can be seen here that several conductor elements 60 run parallel to one another in the slot 20. These conductor elements 60 are wrapped by the insulating paper element 30, wherein the insulating paper element 30 essentially follows the contour of the arrangement of the conductor elements 60. Accordingly, the insulating paper element 30 also lies essentially flat against the radially innermost conductor element 60 on the side facing the radially inner opening 21. The connecting section 50 formed thereby connects the two wall sections 41, 42 of the insulating paper element 30, which in turn lie against the side walls of the slot 20.

[0078] Figures 4-7 show different embodiments of a partial region of a body of a stator of a radial flux machine designed according to the invention with an inserted insulating paper element 30.

[0079] These embodiments differ only in the shape of the insulating paper element 30 on the radially innermost side of the groove 20 and in the specially shaped connecting section 50 provided there, which connects the first wall section 41 to the second wall section 42 of the insulating paper element 30. The connecting section 50 formed here is correspondingly three-dimensional.

[0080] In the first embodiment shown in Figure 4, the insulating paper element 30 is designed with a V-shaped projection 55 in the connecting section 50. Accordingly, the insulating paper element 30 or the connecting section 50 comprises a concave profile 51, which transitions into a convex profile 53 at a first inflection point 52 and then transitions again into a concave profile 51 at a second inflection point 54.

[0081] The second embodiment shown in Figure 5 comprises an exclusively convex profile 53 of the connecting section 50, formed by two planes extending at an obtuse angle to one another, which are connected to one another at an angle vertex.

[0082] The third embodiment shown in Figure 6 comprises in the connecting section 50, starting from a wall section 41, 42, initially a convex profile 53 which, at a first turning point 52, merges into a concave profile 51, which in turn merges into a convex profile at a second turning point 54 and is connected to the opposite wall section 41, 42.

[0083] The fourth embodiment according to Figure 7 comprises a wave-shaped profile 56 in the connecting section 50, with a correspondingly relatively high number of convex and concave profiles.

[0084] What all four embodiments have in common is that the distance A between the two wall sections 41, 42 is less than the length of the connecting section 50, as can be seen by way of example from Figure 5, since here the two surfaces or planes forming the connecting section 50 each have half the length Lv of the connecting section 50 and the sum of the two halves Lv / 2 is greater than the distance A between the two wall sections 41, 42.

[0085] Figures 8 and 9 show a partial area of ​​a winding head in side view, wherein Figure 8 shows a conventional winding head 63 with insulating paper elements 30, and Figure 9 shows a winding head 63 designed according to the invention with insulating paper elements 30.

[0086] Figure 8 shows that insulating paper elements 30 projecting beyond the body 10 comprise sections 40 protruding from a respective groove, which are relatively long and therefore protrude relatively far from the body 10. Figure 9 shows, in an embodiment according to the invention, the sections 40 of the insulating paper elements 30 protruding from the respective groove, which have expanded along the paths of bent sections 61 of the conductor elements 60 emerging from the grooves. This expansion is possible due to the described long design of the connecting section 50, which can stretch under the influence of a compressive force caused by a respective bent section 61.

[0087] Due to this widening of the section 40 of the insulating paper element 30 protruding from a respective groove, it is possible to position the bent sections 61 of the conductor elements 60 closer to the body 10, thereby reducing the overall axial space requirement of the power-generating component.

[0088] Figure 10 shows a partial area of ​​a body of a stator of a radial flux machine designed according to the invention with an inserted insulating paper element 30 in the first embodiment with an axial stop 70. This axial stop 70 serves for the axial contact of the V-shaped projection 55 during the assembly of the conductor elements 60 in the slots 20 and consequently facilitates the assembly of the conductor elements 60. In addition to or alternatively to an axial stop 70, the V-shaped projection 55 protruding from the slot 20 can also be gripped in order to temporarily fix the insulating paper element 30 and thereby facilitate the assembly of the conductor elements 60.

[0089] Figure 11 shows an insulating paper element 30 prior to installation in a groove. It can be seen that the connecting section 50, with the V-shaped projection 55 shown here, has a greater width than the two wall sections 41, 42 in the area of ​​the two overlapping tabs 43, 44, which are connected to the two wall sections 41, 42. This greater width creates a prestress in the insulating paper element 30 when it is arranged in a respective groove 20 as shown in Figures 4-7, and thus facilitates the formation of the three-dimensional profile of the connecting section 50.

[0090] Figures 12 and 13 each show a section of a stator of a

[0091] Radial flux machine in side view, where Figure 12 shows a conventional

[0092] Embodiment shows, and Figure 13 shows an embodiment according to the invention. It can be seen here that in the inventive embodiment shown in Figure 13, due to the widening of the section 40 of the insulating paper element 30 protruding from the groove, the distance 62 of the bent section 61 of the conductor element 60 from the groove or from the body 10 is significantly smaller than in the conventional embodiment shown in Figure 12, in which there is no widening of the insulating paper element 30 or its section 40 protruding from the groove.

[0093] Figures 14-16 show a further advantageous embodiment of the invention, wherein in the axial end regions of the body 10, widenings 23 of the respective groove 20 are present in regions 22 covered by a respective bending section 61.

[0094] Figure 14 shows an embodiment in which widenings 23 are present on each groove 20 on both sides of the conductor element 60 emerging there.

[0095] In contrast, in the embodiment according to Figure 15, an expansion 23 is only carried out under the area 22 covered by a bending section 61.

[0096] In an axial view of the body, as shown in Figure 16, this embodiment results in a mutual formation of the widenings 23 in the side walls of the groove 20.

[0097] Figures 17 and 18 show a section of a stator of a radial flux machine in a side view, wherein Figure 17 shows a conventional stator and Figure 18 shows a stator designed according to the invention.

[0098] Due to the widenings 23 described in relation to Figures 14-16, it is possible in the stator designed according to the invention according to Figure 18 to arrange the bending sections 61 on the conductor elements 60 deeper in the slots 20 than the conventional embodiment according to Figure 17 allows.

[0099] As a result, in the stator designed according to the invention as shown in Figure 8, the winding heads 63 can be arranged axially closer to the body 10, thus saving further axial installation space. The method proposed here for producing a power-generating component of an electric rotary machine, as well as the electric rotary machine with at least one power-generating component manufactured according to the method for producing a power-generating component, makes it possible to design the power-generating component with a small axial installation space requirement.

[0100] List of reference symbols

[0101] I power-generating component

[0102] 10 bodies

[0103] II Circumferential direction

[0104] 20 grooves

[0105] 21 radial inner opening

[0106] 22 area covered by a bending section

[0107] 23 Widening

[0108] 30 insulation paper elements

[0109] 40 section of the insulation paper element protruding from the groove

[0110] 41 first wall section

[0111] 42 second wall section

[0112] 43 first tab

[0113] 44 second tab

[0114] 50 connecting section

[0115] 51 concave course

[0116] 52 first turning point

[0117] 53 convex curve

[0118] 54 second turning point

[0119] 55 V-shaped projection

[0120] 56 wave-shaped profile

[0121] 60 ladder element

[0122] 61 Bending section

[0123] 62 Distance of the bending section of the conductor element to the groove

[0124] 63 winding head

[0125] 70 axial stop

[0126] A Distance between the wall sections

[0127] Lv Length of the connecting section

Claims

Patent claims 1 . Method for producing a power-generating component (1) of an electrical rotary machine, in which a body (10) of a power-generating component (1) is provided with a plurality of grooves (20) arranged along a circumference and preformed insulating paper elements (30) are provided, wherein a respective insulating paper element (30) has two opposing wall sections (41, 42) and a connecting section (50) which has a curved profile in the provided, preformed insulating paper element (30), so that a distance (A) between the wall sections (41, 42) at the points of connection of the wall sections (41, 42) to the connecting section (50) is less than the length (Lv) of the curved connecting section (50), preformed insulating paper elements (30) are inserted into grooves (20) in such a way that the insulating paper elements (30) are axially protrude from the grooves (20),Conductor elements (60) of windings of the power-generating component (1) are arranged in the slots (20), wherein in a respective slot (20) in which an insulating paper element (30) has been arranged, a bent section (61) of at least one conductor element (60) is arranged or designed along a circumferential direction (11) of the power-generating component (1) such that the bent section (61) increases the distance (A) of one wall section (41, 42) of the insulating paper element (30) from the respective other wall section (41, 42) of the insulating paper element (30) and in the process, the connecting section (50) of the insulating paper element (30) is stretched.

2. A method for producing a power-generating component according to claim 1, characterized in that the length (Lv) of the connecting section (50) in relation to the distance (A) between the wall sections (41, 42) at the points of connection of the wall sections (41,42) with the connecting section (50) in the groove (20) is in the following ratio: Lv = 1,1 ... 1,5*A.

3. A method for producing a power-generating component according to one of the preceding claims, characterized in that the conductor element (60) is arranged in the groove (20) such that a distance (62) of the bent section (61) of the conductor element (60) to the groove (20) is less than 1 / 10 of the thickness of the conductor element (60) in the bent section (61).

4. A method for producing a power-generating component according to one of the preceding claims, characterized in that the insulating paper element (30) is arranged in the groove (20) in such a way that the section (40) of the insulating paper element (30) protruding from the groove (20) has a length which is at least as great as the thickness of the conductor element (60) in its bent section (61).

5. A method for producing a power-generating component according to one of the preceding claims, characterized in that at least one groove (20) has a widening (23) in a region (22) covered by a bending section (61) relative to a central region of the groove (20).

6. A method for producing a power-generating component according to one of the preceding claims, characterized in that at least one insulating paper element (30) used has a tab (43, 44) on each of the two opposite wall sections (41, 42), which tabs overlap one another when the insulating paper element (30) is arranged in the groove (20) and which are displaced relative to one another when force is applied by the bending sections (61) of the conductor elements (60).

7. A method for producing a power generating component according to any one of the preceding claims, characterized in that the Connecting section (50) is curved outwards in relation to the groove (20) before the distance (A) between the wall sections (41, 42) is increased.

8. A method for producing a power-generating component according to one of the preceding claims, characterized in that the connecting section (50) has exactly two turning points (52, 54) in its curvature before the distance (A) between the wall sections (41, 42) is increased in its course between the two wall sections (41, 42).

9. A method for producing a power-generating component according to any one of claims 1-7, characterized in that the connecting section (50) has more than two turning points in its curvature in its course between the two wall sections (41, 42) before the distance (A) between the wall sections (41, 42) is increased.

10. An electric rotary machine comprising at least one power-generating component (1) manufactured according to the method for manufacturing a power-generating component according to one of claims 1 to 9.

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