EP3365902A1

EP3365902A1 - Winding arrangement

Info

Publication number: EP3365902A1
Application number: EP16805032.6A
Authority: EP
Inventors: Richard Sille; Tim-Felix Mai; Steffen Weinert
Original assignee: Siemens AG
Current assignee: Siemens Energy Global GmbH and Co KG
Priority date: 2015-12-18
Filing date: 2016-11-23
Publication date: 2018-08-29
Anticipated expiration: 2036-11-23
Also published as: BR112018012061A2; CA3006608C; US20180350510A1; CN108369854A; EP3365902B1; CN108369854B; CA3006608A1; WO2017102269A1; RU2686721C1; DE102015226097B3

Abstract

In order to provide a winding arrangement (8) - comprising a number of winding sections (3a, 3b, 3c...3n) arranged spaced apart from one another in the axial direction and electrically connected to one another forming a series circuit, each winding section comprising a conductor (2) which is wound from an inner end (5a, 5b, 5c...5n) to an outer end (6a, 6b, 6c...6n) of the respective winding section (3a, 3b, 3c...3n) and thus enlarges the winding section (3a, 3b, 3c...3n) in the radial direction, wherein at least one winding section (3a, 3b, 3c...3n) is electrically connected at the outer end (6a, 6b, 6c...6n) thereof to the inner end (5a, 5b, 5c...5n) of the subsequent winding section (3a, 3b, 3c...3n) in the axial direction - which can be cost effectively produced and the winding sections of which are arranged with a comparatively small separation from one another, it is proposed that at least one subsequent winding section (3a, 3b, 3c...3n) in the axial direction forms a step region (10a, 10b, 10c...10n) in which the inner end (5a, 5b, 5c...5n) thereof is arranged in the radial direction at the height of the outer end (6a, 6b, 6c...6n) of the winding section (3a, 3b, 3c...3n) to which same is electrically connected.

Description

description

The invention relates to a winding arrangement having a number of spaced apart in the axial direction and electrically connected to form a series connection winding sections, each having a conductor which is wound from an inner end to an outer end of the respective winding section and thereby ^¬ ßert the winding portion in the radial direction magnification, at least one winding portion is electrically connected at its äuße ^¬ ren end to the inner end of the succeeding coil portion in the axial direction.

The invention further relates to a transformer and a coil or inductor with such a winding arrangement.

The above-mentioned winding arrangement is known, for example, from EP 2 251 877 B1. The ^{Wicklungsan ¬} order shown there consists of a series connection of so-called disc windings, which are arranged at a distance from each other. In this case, the outer end of each disc winding is connected to the inner end of each adjacent axially disposed disc winding. In this way, in the production of the total winding of the conductor at each disc winding always be wound from the inside out on a forming roll. This simplifies Her ^¬ position of the coil assembly with a cost savings in the wake. A disadvantage, however, is that the intermediate portion of the conductor which extends between the disc windings, not only the axial distance of the adjacent

Disk windings but also the radial extent of the winding must bridge. The adjacent Scheibenwicklun- gene must therefore be arranged with a large distance from each other to make room for the said intermediate section. In addition, so-called over windings from the Pra ^¬ tice are known. In camber windings, the outer end of a disk winding is connected to the outer end of the axially succeeding disk winding, but this is wound from outside to inside. The change of the winding direction in the production, however, is complicated and leads to additional costs.

The object of the invention is to provide a winding arrangement of the type mentioned, which is inexpensive to produce and their winding sections are arranged me a relatively small distance from each other.

The invention solves this problem in that at least one subsequent winding section in the axial direction a

Stage region forms, in which its inner end is arranged in the radial direction at the height of the outer end of the Wicklungsab ^{¬ section} , with which it is electrically connected.

According to the invention a coil assembly is provided in which the connection of a winding section is achieved with the respective adjacent winding section by simply Kroep ^¬ fen of the conductor without the conductor must be carried out over longer distances away between adjacent Wicklungsabschnit ^¬ th. In this case, all Windlungsabschnit ^¬ te the same direction of winding. The winding direction thus does not change its scope of the invention. The entire winding arrangement preferably consists of a single wound conductor. This continuous conductor is wound so that winding sections are formed, which are arranged successively in axi ^¬ aler direction. By spirally winding the conductor at certain intervals winding sections are formed. In the winding sections, the interconnects insulated from one another abut one another and, with increasing number of turns, increase the winding section in a direction which is referred to here as a radial direction. By winding are circumferential closed winding sections are formed, which limit an Ab ^¬ average area. The section inner spaces of the winding sections are at least partially aligned in the axial direction, so that the stack of winding sections defines an inner contour, which is referred to below as the winding interior.

In order to make the conductor or conductor section connecting the winding sections as short and compact as possible, each winding section forms, with the exception of the first winding section of the series connection, an eccentric step area in which its inner winding layer has a greater distance from an imaginary central axis of the winding interior than outside level range. This compared with the other portions of increased distance corresponds to the distance between the inner and externa ^¬ ßeren end of the adjacent winding section, thus corresponds in other words to the thickness of the winding. Therefore, the outer conductor need only laterally, ie in the axial tung RICH, are guided by the outer winding layer of the respective winding ^¬ portion to the inner winding layer of the adjacent winding portion. The ^¬ rich so cranked in said conductor Stufenbe then serves as an inner winding layer of said adjacent winding portion. By raising the inner winding layer to the level of the outer winding layer in the step region, the conductor section or the conductor between the winding sections can be made short, so that the distance between the winding sections can also be reduced.

Advantageously, each winding section forms with the exception of the first winding ^¬ portion of the series circuit of a step portion. According to this variant of the invention, the first winding section forms the so-called start of the winding arrangement, via which the winding arrangement is connected, for example, to the phase connection of a transformer or a choke. However, the outer end of the first Wick ^¬ coupling portion is then in the step portion with the in- connected to the lower end of the subsequent winding section in the axial direction, so that this is then the first winding ^¬ section having a step area. This applies correspondingly to the subsequent winding sections in the axial direction.

According to a preferred embodiment of the invention, each coil portion is a disk shape configured ticket ^¬ benwicklung. In a disc winding the individual winding layers are wound precisely above one another, so that they extend disc-shaped virtually in a common layer or "Layer". In accordance with this advantageous further development, the coil assembly is formed even more compact. Advantageously formed each disc winding circumferentially ge ^¬ closed and defines a is interior portion. the portion inner spaces of the disc windings overlap in the stack, resulting from the juxtaposition of the disc winding in the axial direction, so that space for a leg of a transformer or inductor core bereitge ^¬ represents.

In a variant of this, each disk winding outside the step region forms an annular ring section. This allows clinging simply take a circular cylindrical molded body in the manufacture of OF INVENTION ^¬ to the invention winding arrangement, on which the winding portions may be ^¬ wound. This reduces the Herstellungskos ^¬ th.

According to a preferred embodiment of the invention, the disk windings arranged next to one another in the axial direction define a circular-cylindrical interior, which has a center axis, wherein the first winding layer of each disk winding in the step area is at a greater distance from one another

Center axis than in the ring area. The circular cylindrical interiors of a winding enable the recording rather thighs of a yoke, so that do not have to be laboriously adapted.

Conveniently, the center of the step portion of each disk winding with the center of the step portion of the directly adjacent disk winding with respect to the center axis at an angle α. This twisting of the step areas about the center axis is necessary in order to adjust the outer winding position of the disk windings to the radial level or the radial height of the first winding layer of the respectively following ones

To bring disc winding.

According to a further development in this regard, each disk winding is arranged in alignment with the next but one disk winding. According to this variant, the entire winding arrangement forms eccentric bulges only at two locations. This also simplifies the adjustment of the winding arrangement and their subsequent handling. Advantageously, the angle α is 180 degrees. According to the ^¬ ser variant, the bulges lie opposite one another on different sides of the coil assembly. Deviating from this, the angle α is in the range of 10 to 30 degrees. According to this variant of the invention, both bulges are arranged on the same side of the winding arrangement, for example in front. In this way it is possible to limit a Lei ^¬ terfreiraum, which serves to receive inlets or outlets. In principle, any type of conductor can be used in the context of the invention. For example, the conductor is a drawn wire conductor or a flat foil conductor.

Advantageously, the conductor is a strip-shaped strip conductor. As a strip conductor material, for example

Copper or preferably aluminum into consideration, wherein the conductor or here the band-shaped band conductor is surrounded by an insulating layer at least in sections. In the Insulating layer may be an isolate ^¬ de lacquer layer or an insulating film, for example. The Isolierfo ^¬ lie is placed in winding between successive wraps.

According to a purposeful embodiment in this regard, the band conductor is bent twice in the step area. Due to the double bending, the strip conductor can be guided in a particularly simple manner in the axial direction from the respective one winding section to the following winding section.

Advantageously, the winding arrangement is part of a transformer or a coil or choke. Further expedient embodiments and advantages of the inven ^¬ tion are the subject of the following description of embodiments of the invention with reference to the figures of the drawing, wherein like reference numerals refer to like-acting components and wherein

1 shows a winding arrangement according to the prior

Technology,

Figure 2 shows an embodiment of the invention

Coil assembly

3 shows a perspective view of a ^¬ exporting approximately example of the winding arrangement according to the invention,

FIG. 4 shows the winding arrangement according to FIG. 3 in the production process,

5 shows a further embodiment of a winding arrangement OF INVENTION ^¬ to the invention in a partial view, FIG. 6 shows the winding arrangement according to FIG. 5 during the production process,

FIG. 7 shows the winding arrangement according to FIG. 3 in a schematic plan view and

Figure 8 show a further embodiment of an inventions ^{¬ to the} invention winding arrangement in a schematic representation.

FIG. 1 shows a winding arrangement 1 according to the prior art. The winding assembly 1 shows a winding of a conductor 2, which is electrically insulated to the next layer, for example by interposing an insulating film or by an insulating paint. Said conductor 2 is wound, so that the layers of the conductor 2 in a layer are spirally stacked. These spirally superimposed interconnects are referred to here as winding layers. The first winding layer therefore limits a winding interior, which is referred to here as section interior 11. The superposed winding layers lie one above the other in a layer. In other words, the winding layers form disk-shaped disk windings 3a, 3b, 3c... 3n as a winding section. The winding sections are arranged one behind the other in the axial direction 4. In this case, the disc windings 3a, 3b, 3c ... 3n are all arranged at a distance D from each other, wherein the distance D may be different. For example, the distance between the disk windings 3a and 3b is smaller than the distance between the disk windings 3b and 3c. Each of said disc windings 3a, 3b, 3c ... 3n has an inner end 5a, 5b, 5c be ^¬ relationship as 5n and an outer end 6a, 6b, 6c relationship ^¬ example 6n. Furthermore, each disk winding 3a, 3b,

3c ... 3n wound from inside to outside, as is indicated for each disc winding 3a, 3b, 3c ... 3n by an arrow 12 in the radial direction. The said winding direction is further indicated by an arcuate arrow 7. It can be seen that all disc windings 3a, 3b, 3c ... 3n have the same winding direction 7. For electrically connecting, for example, the disk winding 3a to the disk winding 3b, the outer end 6a of the disk winding 3a is connected to the inner end 5b of the disk winding 3b. To make room for the extending between the disc windings 3a and 3b conductor section 2, they must be arranged with a distance D to each other. This applies correspondingly to all other windings 3b, 3c and 3n.

Figure 2 shows an embodiment of the winding assembly 8 according to the invention, the winding assembly 1 according to Figure 1 according to an electrical series circuit Wick ^¬ ment sections, here disc windings 3a, 3b, 3c ... 3n, is formed. As in FIG. 1, all the disk windings 3a, 3b, 3c... 3n have the same winding direction 7, that is, they are from the inner end 5a, 5b, 5c... 5n to the respective outer end 6a, 6b, 6c. 6n of each disc winding 3a, 3b,

3c ... 3n wrapped. As in Figure 1, the outer end 6a, 6b, 6c ... 6n-l of the disc windings 3a, 3b, 3c ... 3n-l are each connected to the inner end of another disc winding 3b, 3c directly or immediately following in the axial direction , 3d connected except for the last partial winding 3n of the series connection. This is connected in the embodiment shown with its outer end 6n at a high voltage connection of the said transformer, not shown figuratively. The inner end 5a of the first disc winding 3a is connected to another high voltage terminal of said transformer.

As schematically illustrated in FIG. 2, the disk winding 3b is raised relative to the disk winding 3a in the radial direction 9 in the region of the connection from 6a to 5b so that its inner end 5b is at the same "radial" height as the outer Therefore, in the context of the invention, the conductor 2 only has to be bent or bent in the axial direction 4 out of the "layer" of the disk winding 3a in order to form the layer of the to be transferred to adjacent disc winding 3b. There it forms the first winding layer. The other Wick can ^¬ development were to be wound in the same direction by simply wrapping Next. A long conductor connection between the winding sections 3a, 3b, 3c... 3n as in FIG. 1 is therefore avoided in the context of the invention. At the same time, in contrast to the so-called lintel winding, the winding direction 7 is the same for all disk windings 3a, 3b, 3c... 3n. Thus, the disc windings 3a, 3b, 3c ... 3n can be arranged with a small distance D to each other, whereby the production of the winding assembly 8 remains cost-effective.

FIG. 3 shows the winding arrangement 8 according to FIG. 2 in a perspective view. It will be appreciated that the ticket ^¬ benwicklungen 3a, 3b, 3c disposed in the axial direction 4, one behind the other at a small distance from each other. In the illustration shown in FIG. 3, the disk winding 3a faces the observer. It can be seen that each disk winding 3 a, 3 b, 3 c... 3 n has a circumferentially closed configuration and thus a section interior 13 is delimited. The ge ^¬ entire stack of disc windings 3a, 3b, 3c ... 3n, that is, the winding assembly 8 defines an internal cavity, which is referred to herein as inner space 14. The interior 14 contains quasi the aligned portion interior 13th

The interior 14 is used to receive a magnetizable material which is adapted to guide a magnetic field with low magnetic resistance. The individual ticket ^¬ benwicklungen 3a, 3n 3b, 3c ... are not circular in plan view and, therefore, limit individually not have a circular section inner chamber 13. Rather, each disc winding 3a, 3b, 3c ... 3n has an eccentric staged portion 10a, 10b, 10c ... 10η on, which has a larger distance to an imaginary central axis of the circular cylindrical interior space 14 of the winding assembly 8 ^¬ than the verblei ^¬ Bende portion of each disc winding 3a, 3b, 3c ... 3n, which follows in a plan view of a circular shape. It can also be seen that the step region 10a is not arranged in alignment with the step region 10b of the disk winding 3b, which immediately follows the first disk winding 3a in the axial direction. Rather, the step portion 10b is circumferentially offset with respect to the step portion 10a, so that the two centers of the stepped portions 10a and 10b with each other be ^¬ züglich the imaginary center axis of the inner space 14 of the winding assembly 8 to split an angle. Furthermore, it can be seen that the step region 10c of the next but one disk winding 3c is arranged in alignment with the step region 10a of the first disk winding 3a. This applies correspondingly to the step areas 10b and 10d. Each disk winding 3a, 3b, 3c ... 3n is therefore provided with its step portion 10a, 10b,

10c ... 10η are arranged in alignment with the respective next but one disk winding 3a, 3b, 3c... 3n, wherein the step sections 10a, 10b, 10c... 10n of disk windings 3a, 3b, 3c. are twisted against each other. Therefore, a total of two eccentric bulges 15, 16 can be seen in the winding arrangement 8, which are formed by the step areas 10a, 10c, 10e ... 10n-l or the step areas 10b, 10d, 10f ... 10n. If the numbered ticket ^¬ benwicklungen 3a, 3b, 3c ... 3n by integers starting with 1, the a bulge 15 of the disc windings 3a, 3d, 3e ... having an even number and other bulge 16 of the 3n-l Disk windings 3b, 3d, 3f ... 3n formed with an odd number.

In Figure 3 can also be seen that the conductor 2 in the äu- ßeren winding layer in the step portion 10b in the axial direction offset from the plane of the disc winding 10a herausge ^¬ leads, so bent, and so the inner end 5b of the two ^¬ th slice winding 3b formed. The inner end 5a is provided to terminate the high voltage output of a transformer in operation. The conductor 2 of the outer winding layer of the disk winding 3b, however, is cranked in the step region 10c axially in the direction of the disk winding 3c, so that this there, the inner end of the disk winding winding 3c trains. However, this is hidden in FIG. 3 by the disk winding 3a.

FIG. 4 illustrates in a perspective illustration during the manufacturing process how the conductor 2 of the disk winding 3b is bent in the step region 10b of the subsequent disk winding 3c to be wound. Furthermore, the step region 3a of the first disk winding can be seen, with which it is connected to the housing of the transformer on the side remote from the observer.

FIG. 5 shows in a partial view a further exemplary embodiment of the winding ^{arrangement according to} the invention in a perspective representation. The wound to the pulley windings 3a, 3b, 3c ... 3n strip conductor 2 is formed in the example shown in comparison with Figure 3 strip conductor 2 slightly wider and thinner, the aluminum-made tape ^¬ conductor 2 is covered by an insulating film. In particular, the step areas 10a, 10b, 10c... 10η can be seen, wherein the respectively next-to-disk windings 3a,

3c, 3e and 3b, 3d, 3f are aligned opposite. The step portions 10a and 10b of adjacent disk windings 3a and 3b are twisted against each other and clamped with respect to the center axis of the hollow cylindrical interior 14 of the winding assembly 8 at an angle, so that by crimping the strip conductor 2 in the axial direction of this leads to the layer of successive in the axial direction of the disk winding can be. FIG. 6 shows the winding arrangement according to FIG. 5 during the production process. Here it can be seen how the strip conductor 2 is bent during manufacture. The conductor 2 illustrated in FIGS. 5 and 6 is designed to be bendable so that it can be bent twice in the step area 10. At a first bending point 17 of the opposite direction of the winding 7 is bent backwards. At a second bending point 18, the strip conductor 2 is bent again, so that it extends again in the desired winding direction 7. In this Twofold bending the conductor 2 is offset in the axial direction, so that it can form the first winding layer of successive ^¬ the disk winding. Figure 7 shows a further embodiment of the OF INVENTION ^¬ to the invention winding assembly 8. In this view it can be seen particularly well in that the disc windings are arranged in alignment to each other. In FIG. 7, it can be seen that the step regions 10η and 10n-1 of the disk windings 3n and 3n-1 form an angle with one another with respect to the center of the circular-cylindrical internal space 14. The circular cylindrical interior 14 is schematically indicated by a dashed circle ^¬ te. It can be seen that the interior 14 is not completely circular cylindrical. Rather, due to the angle between here 20 degrees, an additional routing space 19 is formed, which can serve to receive conductors, cables, terminals and the like, when, for example, an underwinding and a leg of a core extends in the circular cylindrical interior.

Figure 8 shows a further embodiment of the OF INVENTION ^¬ to the invention winding assembly 8, which differs from that shown in Figure 7 embodiment in that the angle which the step portions 10η and 10n-l span with respect to the center axis of the circularly cylindrical inner space 14 MITEI ^¬ Nander, 180 ° is. It can be seen that in this embodiment, the inner contour of the disc windings together limit the circular cylindrical interior, so that a more compact winding arrangement without additional space, as shown in Figure 7, for cable management.

Claims

claims

1. winding arrangement (8) having a number of spaced apart in the axial direction and with the formation of a series circuit electrically interconnected winding sections (3a, 3b, 3c ... 3n), each having a conductor (2), the from an inner end

(5a, 5b, 5c ... 5n) is wound to an outer end (6a, 6b, 6c ... 6n) of the respective winding section (3a, 3b, 3c ... 3n) and thereby the winding section (3a, 3b , 3c ... 3n) in the radial direction, wherein at least one winding section (3a, 3b, 3c ... 3n) at its outer end (6a, 6b, 6c ... 6n) with the inner end (5a, 5b , 5c ... 5n) of the axially following winding section (3a, 3b, 3c ... 3n) is electrically connected,

d a d u r c h e c e n c i n e s that

at least one subsequent Wicklungsab ^¬ in the axial direction section (3a, 3b, 3c ... 3n) a step area

(10a, 1 Ob, 10c ... 1 On) in which he forms his inner end

(5a, 5b, 5c ... 5n) in the radial direction at the height of the outer end (6a, 6b, 6c ... 6n) of the winding section

(3a, 3b, 3c ... 3n) is arranged, with which it is electrically connected.

2. winding arrangement (8) according to claim 1,

d a d u r c h e c e n c i n e s that

with the exception of the first winding portion (3a) of the series circuit ^¬ each winding section (3a, 3b, 3c ... 3n) a step portion (10a, 1 Ob, 10c ... 1 On) is formed.

3. winding arrangement (8) according to claim 2,

d a d u r c h e c e n c i n e s that

each winding section is a disk-shaped disk winding (3a, 3b, 3c ... 3n).

4. winding arrangement (8) according to claim 3,

characterized in that each disc winding (3a, 3b, 3c ... 3n) is formed circumferentially closed and a portion interior (13) limited.

5. winding arrangement (8) according to claim 4,

d a d u r c h e c e n c i n e s that

each disk winding (3a, 3b, 3c ... 3n) outside the step region (10a ... 10η) forms an annular ring section ^¬ .

6. winding arrangement (8) according to claim 5,

d a d u r c h e c e n c i n e s that

the disk windings stacked in the axial direction

(3a, 3b, 3c... 3n) delimit a circular cylindrical interior (14) which has a center axis, wherein the first winding layer of each disk winding (3a, 3b, 3c ... 3n) in the step area (10a, 1 Ob , 10c ... 1 On) has a greater distance to the center axis than in the ring section.

7. winding arrangement (8) according to claim 6,

d a d u r c h e c e n c i n e s that

the center of the step portion (10a, 1 Ob, 10c ... 1 On) of each ticket ^¬ benwicklung (3a, 3b, 3c ... 3n) and the center of the step portion (10a, 1 Ob, 10c ... 1 On) the directly adjacent disc winding (3a, 3b, 3c ... 3n) with respect to the center axis an angle α span each other.

8. Winding arrangement (8) according to claim 7,

d a d u r c h e c e n c i n e s that

each disk winding (3a, 3b, 3c ... 3n) is arranged in alignment with the respective next but one disk winding (3a, 3b, 3c ... 3n).

9. Winding arrangement (8) according to claim 8,

d a d u r c h e c e n c i n e s that

the angle α is between 10 degrees and 30 degrees or 180 degrees.

10. Winding arrangement (8) according to one of the preceding claims, characterized in that

the conductor is a band-shaped band conductor (2).

11. Winding arrangement (8) according to claim 10,

d a d u r c h e c e n c i n e s that

the strip conductor (2) is bent twice in each step region (10a, 1 Ob, 10c ... 1 On).

12. Transformer with a winding arrangement (8) according to one of the preceding claims.

13. coil having a winding arrangement (8) according to one of claims 1 to 3.