WO2017050566A1 - Stator - Google Patents

Abstract

The invention relates to a stator (10) for an electric machine, comprising a stator yoke (12) and multiple waveguide segments (16) which are arranged on the stator yoke (12) in stator grooves (14) in multiple locations (18). Each waveguide segment (16) has at least one location offset section (20) and multiple conductor sections (22). Each conductor section (22) has at least one stator passage section (22a) and a groove offset section (22b), and the stator passage section (22a) of the conductor section (22) is arranged in the location (18) of a stator groove (14) of the stator yoke (12). Adjacent conductor sections (22) of the waveguide segment (16) are arranged in different locations (18), and a location offset section (20) of the waveguide segment (16) is formed over multiple locations (18) and connects two adjacent conductor sections (22) together. Additionally, the waveguide segment (16) is designed such that the waveguide segment has multiple location offset sections (20) and such that the position offsets of successive conductor sections (22) are always formed in the same direction. The invention further relates to a method for producing a waveguide for such a stator.

Description

 stator

The invention relates to a stator for an electric machine according to the preamble of patent claim 1 and to a method for producing a waveguide segment for such a stator.

US 2014/0 1 1 1 057 A1 discloses a waveguide segment which is bent from a wire. In this case, the waveguide segment runs around in the stator several times, wherein a waveguide segment is arranged in several layers of the stator. For the complete stator winding a plurality of waveguide segments are arranged together. It is complicated and complicated to arrange the waveguide segments in such a way.

In US Pat. No. 1,849,215, a waveguide segment for a stator of an electrical machine is shown. Such a waveguide segment is made of a thin sheet. In this case, the waveguide segments are arranged on the stator in a radial position of the stator, wherein for better filling of the stator preferably more of these waveguide segments are adjacent to each other in the circumferential direction.

JP 2010 284 001 also shows a stator with waveguide segments. In this case, identical waveguide segments are arranged in segments like a segment and contacted with each other at their ends. The conductor sections of the waveguide segments are arranged in two layers. Again, the waveguide segments are made of a thin sheet, so that corresponding stator grooves are not optimally filled.

It is therefore an object to provide a waveguide segment for a wave winding, which can be assembled in a simple manner into a waveguide package in multiple execution and wherein the waveguide segments as completely as possible fill stator slots of a stator yoke. The present object is achieved by a stator according to claim 1. In the dependent claims advantageous embodiments of the stator are shown.

The stator in this case comprises a stator yoke and correspondingly a plurality of waveguide segments, wherein the entirety of the waveguide segments forms a waveguide package. In this case, stator slots are uniformly distributed on the circumference of the stator yoke, preferably radially inward. At the stator, in particular at the stator slots, the waveguide segments are arranged in several layers. The layers are in this case thoughtfully formed in the respective stator slots or the stator slots are subdivided into layers, wherein the layers of a stator slot are preferably arranged radially relative to one another.

A waveguide segment in this case has at least one Lageprungabschnitt and a plurality of conductor sections, wherein the conductor sections of a waveguide segment are arranged in different layers. The conductor section is inter alia in a stator passage section, which is arranged within the stator and fills a position of the stator, and divided into a Nutversatzabschnitt. In this case, the slot offset section enables the arrangement of adjacent conductor sections, in particular adjacent stator passage sections of a waveguide segment, in different stator slots of the stator. The conductor portion is formed within a layer, wherein the Lagesprungabschnitt can be formed within several layers. Conveniently, the Lages jumping section is formed over two layers. A first and a last conductor section of the waveguide segment have a contact section for interconnecting the waveguide segment with power electronics or with other waveguide segments. The conductor sections of the waveguide segment preferably pass through the stator yoke in the axial direction, the layers of the stator slots advantageously being arranged radially relative to one another. Advantageously, each stator passage section of a waveguide segment is located in its own position of the stator or of the stator slots. In this case, the waveguide segment on several Lagesprungabschnitte on, wherein position jumps of successive or adjacent conductor sections are always carried out in the same direction, in particular in the radial direction.

Such an embodiment of the waveguide segments makes it possible to arrange them together in a simple manner, for example by simply abutting one another on the stator, thereby producing a waveguide package. The theoretical subdivision of the stator slots into several layers, in particular the direction of adjacent layers, corresponds with advantage to the direction of introduction of the

Stator grooves in the stator yoke. When radially introduced into the stator yoke Statornuten the layers are for example also arranged in the radial direction to each other. The same can also be transmitted to axially introduced stator slots.

In this case, a waveguide segment preferably runs over the stator yoke a maximum of once at the stator yoke. Advantageously, a waveguide segment on the stator yoke turns approximately half way around the stator yoke. In addition, a waveguide segment advantageously has at least 3 or 4 stator passage sections or conductor sections.

The above object is achieved inter alia by a stator according to claim 2. Dependent claims show advantageous embodiments of the stator.

In this case, an end region of a separating surface, which separates two adjacent layers from each other, engages in the position jump section.

Such a separation surface can be produced, for example, during the production of such a waveguide segment. This makes it possible to manufacture the waveguide segment from a sheet of high material thickness. A possible manufacturing method will be explained in more detail below. In addition, several waveguide segments can be arranged to save space on the stator by the positional design. The parting surface engages the sides of the stator passing portion or sides of the stator yoke in the position jumping portion, wherein the position jumping portion has substantially no bend and is formed substantially flat. The position jump section remains in this case, starting from a base body, from which the waveguide segment is produced, in its original form. As a result, the groove offset section can be formed on the waveguide segment with a corresponding production method, in particular that explained in detail below, even at high material thicknesses. The position jump section is thus not damaged in the production, in particular by the lack of deformation, for example by tearing.

The separating surface may in this case be formed by a surface of one of the respective relevant conductor sections and / or by an imaginary surface which divides two conductor sections from one another into different layers.

The remarks on the first and second solution of the problem according to the invention are correspondingly transferable to one another, in particular the statements relating to the stator, the stator yoke, the stator slots, the layers and the waveguide segments and their sections.

Preferably, the two task-solving features of the two stators according to the invention can also be combined with one another. As a result, the benefits complement each other accordingly.

It is further proposed that position jumps of adjacent position jump sections are identical.

The position jump describes the distribution of adjacent conductor sections of the waveguide segment in the layers of the stator slots of the stator yoke. The position jump can be defined inter alia by a position jump value of the associated position jump section. The position jump value indicates the number of layers two adjacent conductor sections of a waveguide segment are offset from each other. Adjacent conductor sections, in particular stator passage sections, through fen the two associated Statornuten in a position jump value of 1 in directly adjacent layers. In the case of a position jump value of 2, one position is correspondingly skipped, and with a position jump value of 3, two positions are correspondingly skipped. The position jump value may favorably take even or odd values. Due to the identical design of the position jumps on a waveguide segment two adjacent conductor sections are always offset by the same number of layers to each other. As a result, a simple arrangement of the waveguide segments together and on the stator yoke is possible. In addition, the waveguide segment is preferably designed step-shaped.

Advantageously, adjacent conductor sections are offset by one position relative to one another by the position jump section in the stator slot.

A position jump value is the size 1. However, the conductor sections can also be formed offset by a plurality of layers to each other and in particular have a Lägeprungwert of 2 or 3.

A cross section of the waveguide segment, in particular of the conductor section, is suitably rectangular.

This profile essentially corresponds to the preferably equally rectangular profile of the stator slots. As a result, the stator slots can be effectively filled by the waveguide segments, preferably completely filled. In this case, each stator slot is filled in layers by the stator passage sections of several waveguide segments. A fill factor of the stator slots, which describes a spatial filling of the stator slot by the waveguides, is very high. A width of the waveguide segment substantially corresponds to the width of the stator slots. When radially introduced into the stator yoke Statornuten the width of the stator is determined, for example, along the circumferential direction.

In one embodiment, a height of the cross section corresponds to at least 40% of the width of the cross section of the waveguide segment or a width of the cross section of the waveguide segment is greater than 1, 5 mm. An extension direction of the width of the cross section of the waveguide segment, when arranged on the stator yoke and in its stator slots, corresponds to the extension direction of the width of the stator slot. An extension direction of the height of the cross section of the waveguide segment accordingly corresponds to the direction of insertion of the stator slot into the stator yoke or the depth of the stator slot.

In other words, the width of the cross section of the waveguide segment substantially correspond to the circumferential direction of the stator yoke and the height of the cross section of the waveguide segment substantially to the radial direction of the stator yoke.

A high material thickness in the direction of the width of the waveguide segment of at least 1.5 mm, at least 2 mm or at least 2.5 mm, allows a high degree of filling of the stator by the waveguide segment. This allows the

Statornuten be filled substantially form-fitting.

In this case, it is further proposed that the groove offset section of the waveguide segment has bending sections which are bent transversely to a surface normal of the separating surface or around a surface normal of the separating surface.

In this case, the bending sections of the waveguide segment are preferably formed exclusively on the groove offset section. As a result, the waveguide segment can be formed in cross-section with a high material thickness.

Conveniently, the waveguide segment is coated or painted insulating.

In addition, it is an object to produce such a stator easily.

This object is achieved by the method of claim 10. In the dependent claims advantageous embodiments of the method are described. In this case, a waveguide segment is produced starting from a sheet-like basic body. The sheet-like base body has, inter alia, a main surface with a surface normal and side surfaces. The main surface is formed by the largest surface on the body. In this case, the sheet-shaped base body has essentially the same area on a front side and on a rear side. For better explanation, however, only the front side of the sheet-shaped base body is meant here. The side surfaces are preferably arranged at right angles or parallel to one another.

In the main body separating surfaces are introduced, said separating surface, starting from a first side surface to a second side surface which is opposite to the first, extends. In this case, the separating surface of the second side surface at a distance. The dividing surfaces define a meandering body. The definition of the first and second side surface is dependent on the respective separation surface, wherein the first and second side surfaces of adjacent separation surfaces are reversed. The separating surfaces can be introduced, for example, by laser machining or by cutting.

At the meandering body, certain portions correspond to the characteristic portions of the later waveguide segment. Several tools engage the sections of the meander-shaped body and fix these sections on the tool. The tools are then relatively designed or moved together with the fixed portions of the meandering body against each other to form the waveguide segment. The fixed sections are preferably not deformed.

In this case, a first tool on a first portion and a second tool on a second portion of the meandering body attack and fix it. The first and the second tool perform a relative movement in the opposite direction, in this case, for example, along the surface normal of the main surface of the original body. The meander-shaped main body can be mounted or manufactured in accordance with a concertina movement, for example, in one or more work steps. In this way, a waveguide segment, in particular the waveguide segment explained above, can be produced in a simple manner. A portion of the meandering body fixed by a tool can form, for example, a stator passage section or a position jump section on the finished waveguide segment. A Nutversatzabschnitt is preferably arranged between two functionally adjacent tools. Functionally adjacent, for example, two tools, which are arranged along the meandering course of the meandering body to two adjacent sections to be fixed. The separating surfaces are advantageously formed perpendicular to their respective first and second side surfaces. The main surface of the body can be made, inter alia, rectangular or square.

The relative movement of functionally adjacent tools is expediently carried out along a surface normal of the main surface of the original base body.

It is proposed that at least one of the tools overlaps and fixes an end region of the separating surface. This end region is in particular overlapped and fixed so that this end region of the separating surface is not deformed, in particular is not deformed during the relative movement of functionally adjacent tools. The separation surface is conveniently overlapped and fixed starting from the second side surface. The end region of the separating surface preferably engages in a Nutversatzabschnitt.

This makes it possible to produce or bend the Nutversatzabschnitte at high material thickness, without the Lageage section is damaged at the end of the interface.

Further, it is advantageous if different sections, in particular all sections to be fixed, of the meandering body are fixed simultaneously by the first, the second and further tools and functional by relative movement adjacent tools are formed in one step to the waveguide segment.

This can be a multiple clamp or encompass the tools are avoided. One working step here means that the tools engage only once on a meander-shaped body and fix their sections in order to form the waveguide segment. The individual relative movements between two functionally adjacent tools for shaping the waveguide segment can be carried out simultaneously or sequentially.

In one embodiment, various sections of the meandering body are repeatedly and successively fixed by the first, the second and optionally further tools to form the waveguide segment by a respective relative movement between functionally adjacent tools in several steps.

This embodiment is significantly cheaper and easier to handle.

For the method, it is proposed that the base body has a material thickness of at least 1.5 mm.

The material thickness may for example be greater than 2 mm, 2.5 mm, 3 mm or 3.5 mm. An advantageous material thickness corresponds approximately to 3.5 mm. The thickness of the material preferably corresponds to the width of the stator slots in order to fill them as completely as possible in several layers.

Conveniently, the meandering body is heated to a room temperature during the relative movement of the tools.

As a result, the bending process is facilitated. The heating of the meandering body can be done for example by energization. It is at the room temperature to about 20 ° C, the meandering body during the Manufacture of the waveguide segment can be heated above 70 ° C, 80 ° C or 100 ° C.

The waveguide segment produced from the basic body is expediently designed in accordance with at least one of the preceding embodiments or according to at least one of claims 1 to 10.

In the following, the stator according to the invention and the method according to the invention for producing a waveguide segment will be explained using corresponding exemplary embodiments and with reference to several figures.

Identical objects, functional units or comparable components are denoted by the same reference numerals across the figures. Further, summary reference numbers are used for components and objects that occur multiple times in one embodiment or in one representation, but are described together in terms of one or more features. Components or objects which are described by the same or by the same reference numerals may be the same, but possibly also different, in terms of individual, several or all features, for example their dimensions, unless otherwise explicitly or implicitly stated in the description. In order to avoid repetition, a multiple description of identical objects, functional units or comparable components in various exemplary embodiments is dispensed with and only differences of the exemplary embodiments are described in this regard.

Showing:

Fig. 1 shows a stator for an electric machine with a stator yoke and

 Waveguide segments;

 Fig. 2 is a waveguide segment of the stator of Fig. 1;

Fig. 3 is a plan view of the waveguide segment of Fig. 2;

Fig. 4 is a side view of the waveguide segment of Fig. 2; 5 shows an enlarged partial view of a position jump section of the waveguide segment from FIG. 2;

 6 shows an illustration of the waveguide segment with tool;

 FIG. 7 shows a stator yoke with a waveguide segment; FIG.

 Fig. 8 is an enlarged view of Fig. 7;

 Fig. 9 shows a set of juxtaposed waveguide segments for the

 stator yoke;

 Fig. 10 is an enlarged view of the waveguide segment of Fig. 9; 1 shows a base body for producing a waveguide segment;

12 shows a meander-shaped body for producing a waveguide segment.

In Fig. 1, a stator 10 is shown for an electric machine. In this case, the stator 10 has an annular stator yoke 12, with stator slots 14 arranged radially on the inside. The stator yoke 12 is formed essentially rotationally symmetrical about a rotation axis A. Furthermore, waveguide segments 16 are arranged on the start yoke 12, which inter alia penetrate the stator slots 14. A single waveguide segment 1 6 is in this case again shown in more detail in FIG. The waveguide segments 1 6 arranged on the stator yoke 12 are arranged radially one above the other in a predetermined width and offset relative to one another on the circumference. A waveguide segment 1 6 is arranged in this embodiment in six radial layers 18 a to f, wherein each passage is made by a stator 14 in a different position 18. 72 waveguide segments 1 6 are formed on the stator yoke, which completely fill the 72 stator slots 14 of the stator yoke 12.

A waveguide segment 16, as can be seen in FIG. 2, has a plurality of position jump sections 20 as well as a plurality of conductor sections 22. Each conductor section 22 is further divided at least into a stator passage section 22a and a slot offset section 22b. In addition, a contact section 24 is formed on each of the first and the last conductor section 22 of the waveguide segment 16. The contact sections 24 serve to connect to further waveguide segments. Menten 1 6 and the contact or the interconnection of the stator 10 with a power electronics, which is not shown here.

In this case, a stator passage section 22a is arranged in each case within a layer 18 in a stator groove 14, which it passes through in the axial direction along the axis of rotation A. In this case, the waveguide segment 16 or its stator passage section 22a has essentially the same cross section as a layer 18 of the stator groove 14. The division of a stator slot into a plurality of layers is clearly illustrated inter alia in FIGS. 7 and 8. In this case, the width B of the waveguide segment 16, in particular of the stator passage section 22a, substantially corresponds to the width BS of a stator groove 14 in the circumferential direction. The height HS or the depth of the stator slots 14 is accordingly formed in the radial direction on the stator yoke 12. The height HS of the stator is hereby mentally divided into six layers 18a to f, wherein the height H of the waveguide segment 1 6, in particular the stator passage portion 22a, the height HSL corresponds to a layer 18 in the radial direction.

In this case, the stator passage section 22a is preferably minimally reduced in cross-section so that it can be inserted or inserted in a simple manner into the stator slots 14 of the stator yoke 12. As a result, it is possible to string together a plurality of stator passage sections 22a of a plurality of adjacent waveguide segments 1 6, in this case along the radial direction of extension of the stator slots 14. As a result, a complete filling of the stator 14 is achieved. The degree of filling of the stator 14 with a conductor, here the waveguide segment 1 6, corresponds to nearly 100%. In this case, the stator passage section 22a has a substantially rectangular cross-section. Adjacent to the stator passage portion 22a, a groove offset portion 22b is formed on the conductor portion 22 on both sides, respectively. In this case, the slot offset section 22b has bending sections 26 in order to enable the stator slot offset of two adjacent stator passage sections 22a of a waveguide segment 16. In this case, two slot offset sections 22b bridge the distance between the two stator slots 14, into which adjacent stator passage sections 22a engage. The bending sections 26 are in this case a surface normal 25 of the parting surfaces 28 is bent or bent transversely to the surface normal 25.

It can be seen that adjacent conductor sections 22 of a waveguide segment 16 are arranged in different layers 18. In this case, two adjacent conductor sections 22 on the waveguide segment 1 6 via a corresponding bearing jump section 20 are interconnected. Likewise, two adjacent groove offset portions 22b are connected to each other via a land jumping portion 20 or via a stator passing portion 22a. The position jump section 20 is in this case formed over two layers 18. It can be seen in Fig. 1, that two adjacent Lageprungabschnitte 20 are each arranged on the opposite side of the stator yoke 12. The position jump sections 20 in this case form the respective position jump between two adjacent conductor sections 22. A position jump value is the size 1. On the waveguide segment 16 shown, 6 stator passages 22a corresponding to 6 correspond to the 6 layers of the stator slots 14.

Fig. 3 shows the waveguide segment 1 6 in a plan view. In this case, the individual layers 18a to 18f can be recognized on the waveguide segment 16. 4, a corresponding side view is shown. Again, you can see the corresponding layers 18a to 18f. In addition, it can be seen that the contact portions 24 are designed to be different in their axial length. In this case, the contact section 24, which is arranged radially on the inside of the stator yoke 12, is preferably made longer than the contact section 24 arranged radially on the outside. As a result, the contacting of the individual waveguide segments 1 6 is simplified by power electronics.

It can also be seen that at a waveguide segment 1 6, the position jumps of adjacent Lageprungabschnitte 20 are identical. The position jump of the position jump sections 20 in this case has the Lägeprungwert 1, ie there is a jump to 1 position. The cross-sectional profile of the waveguide segment or the respective conductor section corresponds in this embodiment, the dimensions with a width B of 3.5 mm and a height H of 2.5 mm. The width B of the conductor section preferably corresponds to at least 1.5 mm. In this case, two bending sections 26 are formed on each groove offset section 22b. In this case, the bending portions 26 of the Nutversatzabschnitts 22b close directly to the respective Lageprungabschnitt 22 and the respective stator passage portion 22a.

It can be seen in FIG. 5 that a separation surface 28 engages in the position jump section 20. The separating surface 28 can be either one of the surfaces 33a or 33b or an imaginary surface 33 which lies between these two adjacent surfaces 33a and 33b. In Fig. 5, the surface 33a is shown, but the surface 33b is hidden. Such a separation surface 28 may generally be formed by a separation process, e.g. be produced by laser cutting, cutting, etc., wherein the separation surface 28 can be used inter alia for the separation of multiple layers 18a to 18f.

The separation surface 28 is shown here as a cut or an incision in the position jump section 20. In this case, a two-layer section 20a, which extends over two layers 18, as well as two single-layer sections 20b, each of which extends over a layer 18, is embodied on the layer jump section 20. In this case, the single-layer section 20b substantially corresponds in its dimensions to the cross-section of a conductor section 22. The two-layer section 20a thus corresponds in its extensions substantially to the double cross-section of the conductor section 22. The two-layer section 20a and the single-layer sections 20b are schematic in FIG clearly separated from each other by an inserted line 27. In this case, a surface of the two-layered portion 20a and the single-layered portions 20b advantageously forms a common planar surface. By means of further lines 29, which in FIG. 5 represent the bending edge 29, the position-changing section 20 is separated from the slot-offset sections 22b. The formation of the two single-layer sections 20b of the layer jump section 20 allow advantages in the production of the waveguide segment 16, in particular a damage-free production of the waveguide elements 16 in the area of the layer jump sections 20. As can be seen in FIG. 6, in the manufacture of the waveguide segment 1 6 tools engage at different sections. FIG. 6 shows the tools 31, 31 a - k for clarity on an already finished waveguide segment 16. In this case, a first tool 31 a and a second tool 31 b engage in a position jump section 20 and on a stator passage section 22a and fix them. The fixation of the sections is illustrated by the thin arrows that point to the tools. Therefore, the fixed portions do not deform when the groove offset portions 22b are formed. One of the tools engages or fixes the position-changing section 20 in such a way that the separating surface 28, which is not visible in FIG. 6, is at least partially overlapped. As a result, damage, in particular tearing, of the position jump section 20 at an end region of the separating surface 28 can be avoided. This will be shown in more detail in connection with the comments on FIGS. 11 and 12. It is thus possible to deform even a sheet of high material thickness without damage. Thus, a large-volume cross section for the conductor portion 22 can be achieved.

In FIG. 7, the stator yoke 12 is shown with a single waveguide segment 16 arranged in its stator slots 14. The waveguide segment 1 6 circumscribes the stator yoke in about halfway. It can be seen here that a first stator passage section 22a of the waveguide segment 16 is arranged in a first position 18a, which forms the radially outermost layer 18. An adjacent to this passage portion 22a is accordingly arranged in a second layer 18b and a subsequent thereto adjacent passage portion 22a in a position 18c. In this case, each stator slot 14 has six layers 1 8. The stator yoke 12 in this case has a total of 72 stator slots 14. Between two adjacent stator passage sections 22a, 5 stator slots 14 are skipped by the two intermediate slot offset sections.

In FIG. 9, a total of 72 waveguide segments are shown corresponding to the 72 stator slots 14 arranged on the stator yoke 12. The waveguide segments are arranged in this representation in a plane to each other. This waveguide package 30 of 72 waveguide segments 1 6 is doing in the 72 stator 14th the stator yoke 12 is arranged. In this case, the waveguide package 30 shown in FIG. 9 is formed into a ring or closed annularly. The first stator passage section 22a of the first waveguide segment 16 is thus now adjacent to the first stator passage section 22a of the 72nd waveguide segment 1 6. The waveguide segments 1 6/1 to 16/72 in this case form the waveguide package 30. The waveguide package 30 can be used as a whole in the stator yoke 12 become. In another variant, the waveguide segments 16 of the waveguide package 30 can also be inserted individually and successively into the stator yoke 12, so that the waveguide package 30 is completed only within the stator yoke 12. It can also be advantageous if the stator yoke 12 is designed in several parts, ie segmented in the circumferential direction, so that a simple assembly is made possible. FIG. 10 shows an enlarged view of a partial detail of FIG. 9. Here again clearly the structure of the different layers can be recognized. In addition, it can be seen that the contact portions 24, each formed on a waveguide segment 16, have a different axial length.

A possible manufacturing method for a waveguide segment 1 6 according to FIG. 2 will be explained with reference to FIGS. 1 1 and 12, wherein the Fig. 6 can be used. In Fig. 1 1, a base body 32 for the production of a waveguide segment 16 is shown. In this case, the base body 32 is sheet-shaped and in this case has a main surface 34 and a plurality of side surfaces 36a-d, in this exemplary embodiment. In this case, the main surface 34 forms the largest surface of the sheet-like base body 32, wherein a surface normal 38 is perpendicular to the main surface. A further surface, which corresponds to the main surface and can also be regarded as the main surface, is arranged on the back side of the sheet-like basic body 32. The sheet-like base body 32 has a thickness or a material thickness of more than 1.5 mm in the direction of the surface normal 38. This thickness or material thickness of the base body corresponds to the later width B of the cross section of the waveguide segment 16 or its different sections. Adjacent side surfaces 36 are rectangular, mutually opposite side surfaces 36 are carried out correspondingly parallel to each other. In the main body 32 separating surfaces 28 are incorporated. The five separating surfaces 28a-e are formed continuously from a first side surface 36 to a second side surface 36, which have a corresponding distance from the second side surface 36. In the case of two adjacent separating surfaces 28, the first side surface 36 and the second side surface 36 are correspondingly exchanged by definition. In the first parting surface 28, the side surface 36a corresponds to the first side surface 36 and the side surface 36c corresponds to the second side surface 36. In the second parting surface, the side surface 36c corresponds to the first side surface 36 and the side surface 36a corresponds to the second side surface 36.

Due to the introduced separating surfaces 28, the main body 32 in FIG. 12 now forms a meander-shaped body 40. The meander-shaped body 40 can be produced, inter alia, from a metal strip, for example by means of a laser cutting method.

At the meander-shaped body 40 engage a plurality of tools 31, at least a first tool 31 a and a second tool 31 b. In this case, the first tool fixes a first section 42a of the meander-shaped body 40 and the second tool secures a second section 42b of the meander-shaped body 40. Further tools 31c-k fix correspondingly further sections 42c-k. In this exemplary embodiment, the first section 42a corresponds to one of the later stator passage sections 22a, wherein a second section 42b here corresponds to one of the later side jump sections 20 of the later waveguide segment 16. For better illustration, tools 31a-k are shown on an already finished waveguide segment 16 in FIG. As a result, nevertheless, the arrangement and the relative movement between the tools 31a-k can be further clarified.

By the complete overlapping of the sections 42a-k by the tool, an undesired deformation of these sections 42a-k, which correspond to the later position jump sections 20 and the later stator passage sections 22a, for the later waveguide segment 16 is excluded. The fixation of Portions through the tools 31a-k are illustrated in FIG. 6 by the thin arrows pointing to the tools.

The fixed sections 42a-k are now displaced by a relative movement of adjacent tools 31 along the surface normal 38 in mutually opposite directions. As a result, the groove offset portion 22b, which is arranged on the later waveguide segment between the stator passage portion 22a and the position jump portion 20, is formed. The movement of the individual tools 31a-f during production of the waveguide segment 16 from the meander-shaped body is graphically represented by the thick arrows in FIG. The number of thick arrows associated with the respective tools 31a-k again illustrates the relative movements between the tools 31a-k.

The production takes place in this embodiment in one step, with a multiple re-clamping of the tools 31 is not necessary. The relative movement between the adjacent tools 31 can be carried out simultaneously or chronologically.

As already explained, the production of the waveguide segment 16 from the meander-shaped body can also be effected by the use of only two or more than two tools 31. In this case, for example, multiple re-clamping of the tools may be necessary. The production is thus carried out in several steps. The relative movement of adjacent tools 31 in the opposite direction corresponds to the previously made versions also in this manufacturing variant.

A tool 31 fixes in the production of a waveguide segment 1 6, as already mentioned, the two-ply portion 20 b and the single-layer portions 20 a. As a result, the tool fixes the future position jump portion 20 and engages over the end portion of the associated parting surface 28. The position jump portion 20 and in particular an end portion of the parting surface 28 are not damaged during the production of Nutversatzab 22b, for example by tearing. This makes it possible thick sheet, so with material thicknesses of about 1, 5 millimeters, without deforming damage. This increased sheet thickness makes it possible to completely fill the stator slots 14 of the stator yoke 12 in layers. The rectangular shape of the Statornuten, the stator passage sections and the positional arrangement allow a very high degree of filling of the stator by conductor material. The waveguide segment 1 6 can then be coated or coated insulating.

REFERENCE CHARACTERS

stator

 stator yoke

 stator

 Waveguide segment

 location

a first location

b second location

c third location

d fourth position

e fifth position

f sixth position

 Location hop

a two-ply section

b single layer section

 conductor section

a stator passage section

b Nut offset section

 Contact section

 surface normal

 bending portion

 line

, a-e separation area

 Bending edge, line

 Optic package

, a-k tool

 body

, a, b area

 main area

, a - d side surfaces

 surface normal

Meandering body 42, a - k section

 42a first section

 42b second section

 A rotation axis

 B wide waveguide segment

BS width stator groove

 H height waveguide segment

HS height stator groove

 HSL height location

Claims

claims 1 . Stator (10) for an electrical machine, comprising  a stator yoke (12) and a plurality of waveguide segments (1 6) arranged in a plurality of layers (18) in stator slots (14) on the stator yoke (12),  - wherein a waveguide segment (1 6) has at least one Lageprungabschnitt (20) and a plurality of conductor sections (22),  wherein a conductor section (22) has at least one stator passage section (22a) and one slot offset section (22b),  wherein the stator passage section (22a) of the conductor section (22) is arranged in a position (18) of a stator slot (14) of the stator yoke (12), - Wherein adjacent conductor portions (22) of the waveguide segment (1 6) are arranged in different layers (18),  wherein a position jump section (20) of the waveguide segment (1 6) is formed over a plurality of layers (18) and connects two adjacent conductor sections (22),  characterized in that the waveguide segment (1 6) has several Lageprungabschnitte (20) and position jumps of successive conductor sections (22) are always formed in the same direction. Second stator (10) according to the preamble of claim 1, characterized in that an end portion of a separating surface (28) which separates two adjacent layers (18) from each other, engages in the Lagesprungabschnitt (20). 3. stator (10) according to claim 1, characterized in that an end portion of a separating surface (28) which separates two adjacent layers (18) from each other, engages in the Lagesprungabschnitt (20). 4. stator (10) according to claim 1 or 3, characterized in that position jumps adjacent Lagesprungabschnitte (20) are identical. 5. stator (10) according to claim 1, 3 or 4, characterized in that adjacent conductor portions (22) by the Lagesprungabschnitt (20) in the stator (14) are offset by one layer (18) to each other. 6. stator (10) according to claim 1, 3, 4 or 5, characterized in that a  Cross-section of the waveguide segment (16) or the conductor portion (22) is rectangular. 7. stator (10) according to one of claims 1 to 6, characterized in that a height (H) of the cross section at least 40% of the width (B) of the cross section of the waveguide segment (1 6) or a width (B) of the cross section of the waveguide segment (1 6) is greater than 1, 5 mm. 8. stator (10) according to one of claims 2 to 7, characterized in that the Nutversatzabschnitt (22b) of the waveguide segment (16) bending sections (26) which are perpendicular to a surface normal (25) of the separating surface (28) bent. 9. A method for producing a waveguide segment (1 6), starting from a sheet-like base body (32) having a major surface (34) and side surfaces (36 a - d), wherein the main surface (34) on the base body (32) the largest Surface forms,  - In which the base body (32) separating surfaces (28) are introduced, Extending from a first side surface (36) to a second side surface (36) opposite the first side surface (36),  Wherein the parting surface (28) is spaced from the second side surface (36),  Wherein the introduced separating surfaces (28) define a meandering body (40), - wherein different portions (42) of the meandering body (40) are then fixed by a plurality of tools (31) to form the meandering body (40) by relative movement of the tools (31) to each other to the waveguide segment (1 6), Wherein at least one first tool (31) fixes a first section (42) of the meandering body (40) and a second tool (31) fixes a second section (42) of the meandering body (40),  • wherein at least the first tool (31) and the second tool (31) to each other perform a relative movement in the opposite direction. 10. The method according to claim 10, characterized in that the relative movement of functionally adjacent tools (31) along a surface normal (25, 38) of the separating surfaces (28) or the main surface (34) of the original base body (32) is executed. 1 1. A method according to claim 10 or 1 1, characterized in that at least one of the tools (31) engages over an end region of the separating surface (28) and fixed. 12. The method according to any one of claims 10 to 12, characterized in that different sections (42) of the meandering body (40) by the first, the second and further tools (31) are fixed simultaneously and by relative movement of functionally adjacent tools (31) be formed in one step to the waveguide segment (16). 13. The method according to any one of claims 10 to 13, characterized in that different portions (42) of the meandering body (40) by the first, the second and optionally further tools (31) are fixed multiple times and in succession to the waveguide segment ( 1 6) by a respective relative movement between functionally adjacent tools (31) in several steps to form. 14. The method according to any one of claims 10 to 14, characterized in that the base body (32) has a material thickness of at least 1, 5 mm. 15. The method according to any one of claims 10 to 15, characterized in that the meandering body (40) during the relative movement of the tools (31) is heated to a room temperature. 1 6. The method according to any one of claims 10 to 15, characterized in that from the base body (32) generated waveguide segment (1 6) according to one of claims 1-10 is formed.