CA2723248A1 - Dry-type transformer - Google Patents
Dry-type transformer Download PDFInfo
- Publication number
- CA2723248A1 CA2723248A1 CA2723248A CA2723248A CA2723248A1 CA 2723248 A1 CA2723248 A1 CA 2723248A1 CA 2723248 A CA2723248 A CA 2723248A CA 2723248 A CA2723248 A CA 2723248A CA 2723248 A1 CA2723248 A1 CA 2723248A1
- Authority
- CA
- Canada
- Prior art keywords
- spacers
- dry
- type transformer
- fiber structure
- fibers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 125000006850 spacer group Chemical group 0.000 claims abstract description 73
- 238000004804 winding Methods 0.000 claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 3
- 239000000835 fiber Substances 0.000 claims description 55
- 238000005266 casting Methods 0.000 claims description 27
- 150000001875 compounds Chemical class 0.000 claims description 22
- 238000000465 moulding Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000002759 woven fabric Substances 0.000 claims description 2
- 238000009826 distribution Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
- H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases
Abstract
The invention relates to a dry-type transformer comprising at least one high-voltage winding and at least one low-voltage winding which interact by means of an electromagnetic field. Every winding is constituted of winding conductors, the high-voltage winding and the low-voltage winding having a defined distance to each other, spacers (10) being provided between the windings to maintain said distance. The invention further relates to a method for producing the spacers (10).
Description
Dry-type transformer Description The invention relates to a dry-type transformer with at least in each case one high-voltage winding and one low-voltage winding, which are operatively connected to one another by an electromagnetic field, each winding being constructed from winding conductors.
It has long been known to use transformers in the distribution of electrical energy by transforming AC
voltage from a high level to a low voltage level, or vice versa. Conductor windings which are wound around a toroidal iron core which generally has a rectangular cross section are used for this purpose.
EP 0 557 549 B1 has disclosed a method for producing a power transformer which is cast with cast resin and has a cut strip-wound core, preferably made from a cold-rolled ferro-alloy which has a preferred direction of magnetization, as well as a toroidal-core transformer produced in accordance with this method.
The distance between the high-voltage winding and the low-voltage winding needs to be maintained very effectively and reliably in order to avoid interference effects. In order that the insulation between the two windings can be subjected to as high a loading as possible, this insulation needs to be constructed with as few defects as possible. However, this is a problem which has as yet not been solved.
The leakage channel of the windings, that is to say the region between the high-voltage winding and the low-voltage winding, is subject to forces which could possibly result in the formation of cracks in the cast, CONFIRMA1?ION COPY
It has long been known to use transformers in the distribution of electrical energy by transforming AC
voltage from a high level to a low voltage level, or vice versa. Conductor windings which are wound around a toroidal iron core which generally has a rectangular cross section are used for this purpose.
EP 0 557 549 B1 has disclosed a method for producing a power transformer which is cast with cast resin and has a cut strip-wound core, preferably made from a cold-rolled ferro-alloy which has a preferred direction of magnetization, as well as a toroidal-core transformer produced in accordance with this method.
The distance between the high-voltage winding and the low-voltage winding needs to be maintained very effectively and reliably in order to avoid interference effects. In order that the insulation between the two windings can be subjected to as high a loading as possible, this insulation needs to be constructed with as few defects as possible. However, this is a problem which has as yet not been solved.
The leakage channel of the windings, that is to say the region between the high-voltage winding and the low-voltage winding, is subject to forces which could possibly result in the formation of cracks in the cast, CONFIRMA1?ION COPY
- 2 - PCT/EP2008/003820 inter alia as a result of temperature fluctuations. It would therefore be advantageous to mechanically reinforce this region. Furthermore, considerable forces also occur as a result of the magnetic flux in the leakage channel between the individual turns of the windings. In particular when the clamping pressure is insufficient for the forces occurring, considerable permanent winding deformations or even winding breakages may occur.
Against the background of this prior art, the object of the invention is to design a dry-type transformer of the type mentioned at the outset in such a way that reliable operation thereof is ensured and the abovementioned problems do not have any influence or only an inconsiderable influence on the operation thereof. In addition, the invention specifies a method which makes it possible to produce the dry-type transformer according to the invention.
This object is achieved according to the invention by the features specified in claim 1. Correspondingly, the invention provides that the high-voltage winding and the low-voltage winding have a defined distance from one another, with spacers which are arranged between the windings being provided in order to maintain said distance. The spacers provided according to the invention have sufficient rigidity which prevents interference during operation which could otherwise not be ruled out.
In accordance with a preferred configuration of the invention, the spacers have a cross-sectional shape, which avoids sharp edges and is optimized in terms of processability and operational reliability. Within the meaning of this configuration according to the invention, the spacers are provided with a circular
Against the background of this prior art, the object of the invention is to design a dry-type transformer of the type mentioned at the outset in such a way that reliable operation thereof is ensured and the abovementioned problems do not have any influence or only an inconsiderable influence on the operation thereof. In addition, the invention specifies a method which makes it possible to produce the dry-type transformer according to the invention.
This object is achieved according to the invention by the features specified in claim 1. Correspondingly, the invention provides that the high-voltage winding and the low-voltage winding have a defined distance from one another, with spacers which are arranged between the windings being provided in order to maintain said distance. The spacers provided according to the invention have sufficient rigidity which prevents interference during operation which could otherwise not be ruled out.
In accordance with a preferred configuration of the invention, the spacers have a cross-sectional shape, which avoids sharp edges and is optimized in terms of processability and operational reliability. Within the meaning of this configuration according to the invention, the spacers are provided with a circular
- 3 - PCT/EP2008/003820 cross section or with an oval or rectangular cross section.
In general, in the case of the dry-type transformer according to the invention, the longitudinal edges of the spacers are provided with a radius.
Corresponding to a further preferred development of the dry-type transformer according to the invention, the spacers arranged between the high-voltage winding and the low-voltage winding are mechanically reinforced and connected to one another by means of a fiber structure.
It is possible in this case to provide that the fiber structure provided for reinforcing the spacers is formed by rovings comprising high-strength electrically non-conductive fibers or from a woven fabric comprising high-strength electrically nonconductive fibers. In addition, the fiber structure can advantageously also be formed by a mesh comprising high-strength electrically nonconductive fibers.
In a preferred development of the invention, the fiber structure can be formed from glass fibers, from aramid fibers, from carbon fibers or from a mixture of these fibers. As regards the required thickness of the spacers, the thickness of these fiber bundles is only a fraction of this, namely approximately in a ratio of 1 to 10, i.e. the fiber bundles have a thickness of 1 mm and the spacers a thickness of 10 mm.
In accordance with one advantageous embodiment, the invention provides that the fiber structure provided for reinforcing the spacers is integrated at least partially in the spacers, wherein the fibers forming the fiber structure can be introduced locally by means of being cast or inserted into the spacers, for example.
In general, in the case of the dry-type transformer according to the invention, the longitudinal edges of the spacers are provided with a radius.
Corresponding to a further preferred development of the dry-type transformer according to the invention, the spacers arranged between the high-voltage winding and the low-voltage winding are mechanically reinforced and connected to one another by means of a fiber structure.
It is possible in this case to provide that the fiber structure provided for reinforcing the spacers is formed by rovings comprising high-strength electrically non-conductive fibers or from a woven fabric comprising high-strength electrically nonconductive fibers. In addition, the fiber structure can advantageously also be formed by a mesh comprising high-strength electrically nonconductive fibers.
In a preferred development of the invention, the fiber structure can be formed from glass fibers, from aramid fibers, from carbon fibers or from a mixture of these fibers. As regards the required thickness of the spacers, the thickness of these fiber bundles is only a fraction of this, namely approximately in a ratio of 1 to 10, i.e. the fiber bundles have a thickness of 1 mm and the spacers a thickness of 10 mm.
In accordance with one advantageous embodiment, the invention provides that the fiber structure provided for reinforcing the spacers is integrated at least partially in the spacers, wherein the fibers forming the fiber structure can be introduced locally by means of being cast or inserted into the spacers, for example.
- 4 - PCT/EP2008/003820 As has already been mentioned above, the invention also relates to a method for producing mechanically reinforced spacers which are arranged between the windings in order to maintain the required distance between the high-voltage winding and the low-voltage winding of a dry-type transformer.
In this case, the object consists in making it possible, in a simple manner, to produce spacers for a dry-type transformer according to the invention.
This object is achieved according to the invention by the characterizing features of claim 15.
Correspondingly, the method according to the invention is characterized by the fact that the moldings provided for producing the spacers are positioned at a defined distance from one another.
Then, the fiber structure which is provided for mechanically reinforcing the spacers and comprises high-strength, electrically nonconductive fibers and the positioned moldings for the spacers are brought into contact with one another, wherein preferably the fiber structure provided for processing is laid locally onto the moldings and each molding is then virtually closed, for example, by a cover part in order to prevent any leakages during casting of the casting compound.
Then, the casting compound is cast into this arrangement, i.e. into the moldings which are positioned at defined distances from one another for the spacers with the fiber structure interposed, as a result of which the fiber structure is at least partially surrounded by means of the casting compound with the spacers and anchored therein.
In this case, the object consists in making it possible, in a simple manner, to produce spacers for a dry-type transformer according to the invention.
This object is achieved according to the invention by the characterizing features of claim 15.
Correspondingly, the method according to the invention is characterized by the fact that the moldings provided for producing the spacers are positioned at a defined distance from one another.
Then, the fiber structure which is provided for mechanically reinforcing the spacers and comprises high-strength, electrically nonconductive fibers and the positioned moldings for the spacers are brought into contact with one another, wherein preferably the fiber structure provided for processing is laid locally onto the moldings and each molding is then virtually closed, for example, by a cover part in order to prevent any leakages during casting of the casting compound.
Then, the casting compound is cast into this arrangement, i.e. into the moldings which are positioned at defined distances from one another for the spacers with the fiber structure interposed, as a result of which the fiber structure is at least partially surrounded by means of the casting compound with the spacers and anchored therein.
- 5 - PCT/EP2008/003820 A further advantageous aspect of the method according to the invention is characterized by the fact that prior to and during the casting of the casting compound into the moldings provided for producing the spacers, in each case high-strength, electrically non-conductive fibers are inserted, said fibers thus contributing to the mechanical stability of the spacers produced in accordance with the method.
A further preferred measure for improving the mechanical strength of the spacers according to the invention is characterized by the fact that depending on the material provided as casting compound, the casting compound located in the moldings is cured before the moldings are removed from the spacers.
Provision is furthermore made for the above-described spacers to be inserted between the high-voltage winding and the low-voltage winding as early as during the winding process prior to the application of the high-voltage winding. This has the advantage of the uniform introduction of force or distribution of force in the event of the occurrence of interference which has a disadvantageous effect on the winding integrity.
In accordance with an advantageous embodiment of the invention, the spacers are preferably manufactured from the same material which is intended to be used later for the casting of the entire winding. The surface of the spacers is in this case prepared in such a way that there is best-possible adhesion of the casting compound on the respective spacer.
In order to control the possible mechanical loads in the region of the leakage channel, the invention provides for inserts of high-strength fibers in the form of glass rovings or a glass mesh to be provided in order to mechanically reinforce the windings or the casting compound surrounding the windings.
This reinforcement is also integrated in the spacers which are still required, i.e. the mechanical reinforcing material is cast into the spacers at specific distances as well, for example. This results in a glass mesh reinforcement with an integrated spacer, for example.
Further advantageous possible configurations are mentioned in the further dependent claims.
The invention, further embodiments and further advantages will be described in more detail with reference to the exemplary embodiments illustrated in the drawings, in which:
Figure 1 shows an outline of possible cross-sectional shapes of the spacers according to the invention, and Figure 2 shows an arrangement of spacers which are connected to a mesh-like reinforcing structure comprising fibers.
Figure 1 illustrates a series of different cross-sectional shapes for the spacers 10 according to the invention which are inserted between the winding layers of the high-voltage winding (not illustrated in any more detail here).
Expediently, these spacers 10 are introduced between the relevant layers as early as during the production of the winding (not illustrated in any more detail) in order thus to ensure that the load distribution or introduction of load as a result of forces caused by temperature fluctuations or else by the magnetic flux in the leakage channel between the individual turns of the windings is made more uniform.
The preferred cross-sectional shapes of the spacers 10 according to the invention are those cross-sections which, owing to their shape, firstly have a sufficiently high elastic section modulus and secondly can be processed easily when constructing the winding layers. Such shapes do not have any sharp-edged regions at which possible stresses could concentrate, but have a harmonious profile, for example a circular shape or rectangular shape with rounded edge regions or an oval shape. In any case, the spacers are formed from electrically nonconductive, highly resistive fibers which therefore have sufficient mechanical strength.
The spacers 10 according to the invention are preferably produced in elongate moldings (likewise not shown in any more detail here), into which the mentioned fibers are inserted and then surrounded by a preferably curing casting compound introduced into he moldings.
Instead of this type of production, the spacers according to the invention can also be produced by means of an already premixed casting compound, i.e. the abovementioned casting compound, for example based on synthetic resins such as polyester resin, is first enriched with fibers of different lengths and then subsequently cast into the relevant moldings. In this case, the fibers which are arranged so as to be distributed uniformly in the casting compound form a fiber-reinforced, high-strength spun fabric with the casting compound.
Figure 2 illustrates a variant according to the invention of the spacers 10 according to the invention, in which variant the spacers 10, which are arranged parallel to one another, are connected to one another by means of a network 12 of high-strength nonconductive fibers 14. In this configuration, the spacers 10 provided are those which have a circular cross section.
The mesh-like fiber structure 12 is in this case connected virtually integrally with the mutually adjacent spacers 10 and thus provides additional reinforcement of the spacers 10 by virtue of said spacers forming a unit with the fiber bundles 14 adjoining the respective meshes, as a result of the production process.
In order to produce these spacers 10 which are reinforced by the mesh 12, provision is made for initially the mesh 12 to be produced from high-strength fibers 14 then for each to be assembled with the moldings (not shown here in any more detail) provided for producing the spacers 10 and then to be surrounded locally by the casting compound provided for producing the spacers 10 when said casting compound is introduced into the moldings for the spacers 10.
In this regard, figure 2 shows two views, namely a side view at the top and a plan view or sectional view at the bottom, the latter running at an angle of 90 with respect to the side view.
The latter illustration shows that the fiber structure has a substantially unchanged thickness at the points of intersection 16 between the fiber bundles 14 forming the mesh 12, while the increased thickness of the spacers 10, which are approximately 150% thicker than the mesh-like fiber structure 12, is clearly apparent at the points of intersection 18 with the spacers 10.
List of Reference Symbols 10 Spacers 12 Mesh, Mesh-like fiber structure 14 Fiber bundles 16 Point of intersection of fiber bundles 18 Point of intersection of fiber bundles with spacers
A further preferred measure for improving the mechanical strength of the spacers according to the invention is characterized by the fact that depending on the material provided as casting compound, the casting compound located in the moldings is cured before the moldings are removed from the spacers.
Provision is furthermore made for the above-described spacers to be inserted between the high-voltage winding and the low-voltage winding as early as during the winding process prior to the application of the high-voltage winding. This has the advantage of the uniform introduction of force or distribution of force in the event of the occurrence of interference which has a disadvantageous effect on the winding integrity.
In accordance with an advantageous embodiment of the invention, the spacers are preferably manufactured from the same material which is intended to be used later for the casting of the entire winding. The surface of the spacers is in this case prepared in such a way that there is best-possible adhesion of the casting compound on the respective spacer.
In order to control the possible mechanical loads in the region of the leakage channel, the invention provides for inserts of high-strength fibers in the form of glass rovings or a glass mesh to be provided in order to mechanically reinforce the windings or the casting compound surrounding the windings.
This reinforcement is also integrated in the spacers which are still required, i.e. the mechanical reinforcing material is cast into the spacers at specific distances as well, for example. This results in a glass mesh reinforcement with an integrated spacer, for example.
Further advantageous possible configurations are mentioned in the further dependent claims.
The invention, further embodiments and further advantages will be described in more detail with reference to the exemplary embodiments illustrated in the drawings, in which:
Figure 1 shows an outline of possible cross-sectional shapes of the spacers according to the invention, and Figure 2 shows an arrangement of spacers which are connected to a mesh-like reinforcing structure comprising fibers.
Figure 1 illustrates a series of different cross-sectional shapes for the spacers 10 according to the invention which are inserted between the winding layers of the high-voltage winding (not illustrated in any more detail here).
Expediently, these spacers 10 are introduced between the relevant layers as early as during the production of the winding (not illustrated in any more detail) in order thus to ensure that the load distribution or introduction of load as a result of forces caused by temperature fluctuations or else by the magnetic flux in the leakage channel between the individual turns of the windings is made more uniform.
The preferred cross-sectional shapes of the spacers 10 according to the invention are those cross-sections which, owing to their shape, firstly have a sufficiently high elastic section modulus and secondly can be processed easily when constructing the winding layers. Such shapes do not have any sharp-edged regions at which possible stresses could concentrate, but have a harmonious profile, for example a circular shape or rectangular shape with rounded edge regions or an oval shape. In any case, the spacers are formed from electrically nonconductive, highly resistive fibers which therefore have sufficient mechanical strength.
The spacers 10 according to the invention are preferably produced in elongate moldings (likewise not shown in any more detail here), into which the mentioned fibers are inserted and then surrounded by a preferably curing casting compound introduced into he moldings.
Instead of this type of production, the spacers according to the invention can also be produced by means of an already premixed casting compound, i.e. the abovementioned casting compound, for example based on synthetic resins such as polyester resin, is first enriched with fibers of different lengths and then subsequently cast into the relevant moldings. In this case, the fibers which are arranged so as to be distributed uniformly in the casting compound form a fiber-reinforced, high-strength spun fabric with the casting compound.
Figure 2 illustrates a variant according to the invention of the spacers 10 according to the invention, in which variant the spacers 10, which are arranged parallel to one another, are connected to one another by means of a network 12 of high-strength nonconductive fibers 14. In this configuration, the spacers 10 provided are those which have a circular cross section.
The mesh-like fiber structure 12 is in this case connected virtually integrally with the mutually adjacent spacers 10 and thus provides additional reinforcement of the spacers 10 by virtue of said spacers forming a unit with the fiber bundles 14 adjoining the respective meshes, as a result of the production process.
In order to produce these spacers 10 which are reinforced by the mesh 12, provision is made for initially the mesh 12 to be produced from high-strength fibers 14 then for each to be assembled with the moldings (not shown here in any more detail) provided for producing the spacers 10 and then to be surrounded locally by the casting compound provided for producing the spacers 10 when said casting compound is introduced into the moldings for the spacers 10.
In this regard, figure 2 shows two views, namely a side view at the top and a plan view or sectional view at the bottom, the latter running at an angle of 90 with respect to the side view.
The latter illustration shows that the fiber structure has a substantially unchanged thickness at the points of intersection 16 between the fiber bundles 14 forming the mesh 12, while the increased thickness of the spacers 10, which are approximately 150% thicker than the mesh-like fiber structure 12, is clearly apparent at the points of intersection 18 with the spacers 10.
List of Reference Symbols 10 Spacers 12 Mesh, Mesh-like fiber structure 14 Fiber bundles 16 Point of intersection of fiber bundles 18 Point of intersection of fiber bundles with spacers
Claims (19)
1. A dry-type transformer with at least in each case one high-voltage winding and one low-voltage winding, which are operatively connected to one another by an electromagnetic field, each winding being constructed from winding conductors, characterized in that the high-voltage winding and the low-voltage winding have a defined distance from one another, with spacers (10) which are arranged between the windings being provided in order to maintain said distance.
2. The dry-type transformer as claimed in claim 1, characterized in that the spacers (10) have a cross-sectional shape, which avoids sharp edges and is optimized in terms of processability and operational reliability.
3. The dry-type transformer as claimed in claim 2, characterized in that the spacers (10) are provided with a circular cross section.
4. The dry-type transformer as claimed in claim 2, characterized in that the spacers (10) are provided with an oval cross section.
5. The dry-type transformer as claimed in claim 2, characterized in that the spacers (10) are provided with a rectangular cross section.
6. The dry-type transformer as claimed in claim 5, characterized in that the longitudinal edges of the spacers (10) are provided with a radius.
7. The dry-type transformer as claimed in one of the preceding claims, characterized in that the spacers (10) arranged between the high-voltage winding and the low-voltage winding are mechanically reinforced and connected to one another by means of a fiber structure (12).
8. The dry-type transformer as claimed in claim 7, characterized in that the fiber structure (12) provided for reinforcing the spacers (10) is formed by rovings comprising high-strength electrically non-conductive fibers (14).
9. The dry-type transformer as claimed in claim 7, characterized in that the fiber structure (12) is formed by a woven fabric comprising high-strength electrically nonconductive fibers (14).
10. The dry-type transformer as claimed in claim 7, characterized in that the fiber structure (12) is formed by a mesh comprising high-strength electrically nonconductive fibers (14).
11. The dry-type transformer as claimed in one of claims 7 to 10, characterized in that the fiber structure (12) is formed from glass fibers.
12. The dry-type transformer as claimed in one of claims 7 to 10, characterized in that the fiber structure (12) is formed from aramid fibers.
13. The dry-type transformer as claimed in one of claims 7 to 10, characterized in that the fiber structure (12) is formed from carbon fibers.
14. The dry-type transformer as claimed in one of the preceding claims, characterized in that the fiber structure (12) provided for reinforcing the spacers is integrated at least partially in the spacers (10).
15. The dry-type transformer as claimed in claim 14, characterized in that the casting compound is mixed with fibers (14) which correspond to those in the fiber structure (12) provided for reinforcing purposes.
16. A method for producing mechanically reinforced spacers (10) which are arranged between the windings in order to maintain the required distance between the high-voltage winding and the low-voltage winding of a dry-type transformer, characterized in that .cndot. the moldings provided for producing the spacers (10) are positioned at a defined distance from one another, .cndot. the fiber structure (12) which is provided for mechanically reinforcing the spacers and comprises high-strength, electrically non-conductive fibers (14) is brought into contact with the positioned moldings for the spacers (10), and .cndot. the fiber structure which has been provided with moldings positioned at defined distances from one another for the spacers is at least partially surrounded by the casting compound and anchored therein when the casting compound for the spacers is cast into the moldings provided for this purpose.
17. The method as claimed in claim 16, characterized in that, prior to and during the casting of the casting compound into the moldings provided for producing the spacers (10), in each case high-strength, electrically non-conductive fibers (14) are inserted.
18. The method as claimed in claim 16, characterized in that, prior to the casting of the casting compound for the production of the spacers (10), high-strength, electrically non-conductive fibers (14) are added.
19. The method as claimed in claim 16 or 17, characterized in that, depending on the material provided as casting compound, the casting compound located in the moldings is cured before the moldings are removed from the spacers (10).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2008/003820 WO2009138095A1 (en) | 2008-05-13 | 2008-05-13 | Dry-type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2723248A1 true CA2723248A1 (en) | 2009-11-19 |
| CA2723248C CA2723248C (en) | 2015-04-14 |
Family
ID=40433722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2723248A Active CA2723248C (en) | 2008-05-13 | 2008-05-13 | Dry-type transformer |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US8310330B2 (en) |
| EP (1) | EP2274754B1 (en) |
| CN (1) | CN102027553B (en) |
| AT (1) | ATE522916T1 (en) |
| BR (1) | BRPI0822676B8 (en) |
| CA (1) | CA2723248C (en) |
| ES (1) | ES2370182T3 (en) |
| PL (1) | PL2274754T3 (en) |
| WO (1) | WO2009138095A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443928A (en) * | 2011-10-29 | 2012-05-09 | 常熟市福嘉丽织造有限公司 | Novel electric insulating fabric |
| WO2017040303A1 (en) * | 2015-08-29 | 2017-03-09 | Abb Schweiz Ag | Transformer, coil assembly and spacer |
| DE102017220781B4 (en) * | 2017-11-21 | 2019-09-26 | Siemens Aktiengesellschaft | Method for producing spacers for a winding unit and winding unit |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1495823A (en) * | 1921-01-14 | 1924-05-27 | Acme Wire Company | Electrical coil and method of making the same |
| DE1488794A1 (en) * | 1951-01-28 | 1969-02-20 | Bbc Brown Boveri & Cie | Pressed yoke part for dry transformers |
| US2783441A (en) * | 1952-07-25 | 1957-02-26 | Gen Electric | Transformer |
| CH324509A (en) * | 1954-08-30 | 1957-09-30 | Mcgraw Electric Co | Process for producing the insulation for the coil structure in electrical devices and insulation produced according to this process |
| CH487485A (en) * | 1968-01-30 | 1970-03-15 | High Voltage Engineering Corp | High voltage induction device |
| DE1948848A1 (en) * | 1969-09-26 | 1971-04-01 | Siemens Ag | Small,high voltage, wound components |
| US3748616A (en) * | 1972-03-24 | 1973-07-24 | Ite Imperial Corp | Transformer winding structure using corrugated spacers |
| CH567327A5 (en) * | 1973-12-19 | 1975-09-30 | Bbc Brown Boveri & Cie | |
| JPS54131717A (en) * | 1978-04-05 | 1979-10-13 | Hitachi Ltd | Inter-winding insulation apparatus of oil-filled transformer |
| US4238753A (en) * | 1978-06-02 | 1980-12-09 | Trw Inc. | Transformer core gapping and lead anchoring arrangement |
| DE3101217C2 (en) * | 1981-01-16 | 1984-08-23 | Smit Transformatoren B.V., Nijmegen | Winding for a dry-type transformer with spacer arrangement |
| SE426116B (en) * | 1981-04-30 | 1982-12-06 | Asea Ab | POWER TRANSFORMER OR REACTOR |
| EP0557549B1 (en) * | 1992-02-26 | 1995-08-30 | HANSER, Volker | Toroidal core transformer |
| US5383266A (en) * | 1993-03-17 | 1995-01-24 | Square D Company | Method of manufacturing a laminated coil to prevent expansion during coil loading |
| US5396210A (en) * | 1993-03-17 | 1995-03-07 | Square D Company | Dry-type transformer and method of manufacturing |
| TW299064U (en) * | 1995-01-23 | 1997-02-21 | Hitachi Ltd | Resin molded transformer |
| GB2331853A (en) * | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Transformer |
| US6806803B2 (en) * | 2002-12-06 | 2004-10-19 | Square D Company | Transformer winding |
| US7688170B2 (en) * | 2004-06-01 | 2010-03-30 | Abb Technology Ag | Transformer coil assembly |
-
2008
- 2008-05-13 ES ES08758482T patent/ES2370182T3/en active Active
- 2008-05-13 AT AT08758482T patent/ATE522916T1/en active
- 2008-05-13 CA CA2723248A patent/CA2723248C/en active Active
- 2008-05-13 PL PL08758482T patent/PL2274754T3/en unknown
- 2008-05-13 EP EP08758482A patent/EP2274754B1/en active Active
- 2008-05-13 CN CN200880129248.0A patent/CN102027553B/en active Active
- 2008-05-13 BR BRPI0822676A patent/BRPI0822676B8/en active IP Right Grant
- 2008-05-13 WO PCT/EP2008/003820 patent/WO2009138095A1/en active Application Filing
-
2010
- 2010-11-12 US US12/945,261 patent/US8310330B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP2274754A1 (en) | 2011-01-19 |
| US8310330B2 (en) | 2012-11-13 |
| US20110273259A1 (en) | 2011-11-10 |
| WO2009138095A1 (en) | 2009-11-19 |
| ES2370182T3 (en) | 2011-12-13 |
| BRPI0822676B8 (en) | 2023-11-07 |
| PL2274754T3 (en) | 2012-01-31 |
| CN102027553A (en) | 2011-04-20 |
| CA2723248C (en) | 2015-04-14 |
| CN102027553B (en) | 2015-05-20 |
| EP2274754B1 (en) | 2011-08-31 |
| BRPI0822676A2 (en) | 2015-06-30 |
| ATE522916T1 (en) | 2011-09-15 |
| BRPI0822676B1 (en) | 2023-10-10 |
| BRPI0822676A8 (en) | 2022-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2052393B1 (en) | Disc wound transformer with improved cooling and impulse voltage distribution and its manufacturing method | |
| EP2320440B1 (en) | Transformer winding and a method of reinforcing a transformer winding | |
| CA2723248C (en) | Dry-type transformer | |
| CN107615417B (en) | Induction coil unit with fiber reinforced ferrite core | |
| EP2367181A1 (en) | Three-phase high performance dry-type transformer with epoxy-insulated coils and method for manufacturing of same | |
| JPH04168704A (en) | Molding method for ground coil for magnetically levitated transportation system and the ground coil | |
| CN103282982B (en) | Transformer winding | |
| US20110163835A1 (en) | Winding for a transformer | |
| RU131531U1 (en) | POLICOMPOSITION CARRYING CORE FOR ELECTRICAL WIRE AND METHOD OF PRODUCING IT, AND ALSO ELECTRIC WIRE CONTAINING SUCH CORE | |
| CN114156081B (en) | Reinforcing method and reinforcing structure of high-field pulse magnet | |
| US8410888B2 (en) | Method for producing a disk winding and disk winding | |
| CN114300239A (en) | Dry-type transformer | |
| CN208903810U (en) | A kind of iron yoke barrier insulation structure of dry-type transformer | |
| RU131230U1 (en) | POLICOMPOSITION CARRYING CORE FOR ELECTRICAL WIRE AND METHOD OF PRODUCING IT, AND ALSO ELECTRIC WIRE CONTAINING SUCH CORE | |
| CN106057441A (en) | Oil-immersed transformer body reinforcement structure capable of enhancing short-circuit withstand ability | |
| DE102019109511B4 (en) | Climatic-proof solenoid | |
| CN101939802B (en) | Method for production of a winding block for a coil of a transformer and coil produced in this way | |
| EP2479764B1 (en) | Resin molded coil and molded transformer using the same | |
| JP2019077077A (en) | Fiber-reinforced resin molding and method for manufacturing the same | |
| CN217606674U (en) | Transformer coil and transformer | |
| JP2024506149A (en) | Winding bodies, high voltage windings and dry type transformers | |
| CN103707569A (en) | Carbon composite component | |
| CN114696564A (en) | Suspension propulsion integrated module | |
| CN101631405A (en) | Application of quadrate glass fiber and ethoxyline resin composite material drawing and extruding bar | |
| CN109300672A (en) | A kind of the iron yoke barrier insulation structure and its installation method of dry-type transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |