WO2016050515A1 - Trockentransformatorkern - Google Patents
Trockentransformatorkern Download PDFInfo
- Publication number
- WO2016050515A1 WO2016050515A1 PCT/EP2015/071235 EP2015071235W WO2016050515A1 WO 2016050515 A1 WO2016050515 A1 WO 2016050515A1 EP 2015071235 W EP2015071235 W EP 2015071235W WO 2016050515 A1 WO2016050515 A1 WO 2016050515A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core
- dry
- transformer
- iron core
- housing
- Prior art date
Links
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
- H01F27/23—Corrosion protection
-
- 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
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- 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
- H01F27/24—Magnetic cores
-
- 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
- H01F27/24—Magnetic cores
- H01F27/25—Magnetic cores made from strips or ribbons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F2003/005—Magnetic cores for receiving several windings with perpendicular axes, e.g. for antennae or inductive power transfer
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
Definitions
- the present invention relates to a dry-type transformer core comprising an iron core having a number of wraparound legs connected by a number of yokes.
- a dry-type transformer is a transformer which does not contain liquid insulating materials such as e.g. B. contains transformer oil. Dry transformers are commonly used as power transformers, in particular as such in electrical energy networks. They are therefore often three-phase designed as a three-phase AC transformer. Dry transformers are used especially where due to the proximity to persons or property oil-filled transformers or only with significant fire protection measures such. B. fire walls, can be placed. Also, oil catchment pits do not contribute to groundwater protection.
- the dry-transformer core comprises a housing formed on the iron core, which surrounds the iron core substantially flush.
- the invention is based on the consideration that both of the above-mentioned objects could be achieved by a housing, which on the one hand ensures the mechanical strength of the iron core by enclosing it flush, d. H. so that the individual electrical sheets are held by the enclosure form-fitting in their position, and on the other hand ensures by a complete encapsulation for a good corrosion protection.
- the non-magnetic enclosure vorteilhaf ⁇ ingly an average permeability from -1.01 to 1.01, preferably from -1.001 to 1.001 in.
- the ratio of Permeabi- is hereby formality (ratio of the magnetic flux density for magneti ⁇ 's field strength) of the casing understood to that of the vacuum.
- the housing is thus advantageously made of a material whose permeability as far as possible corresponds to the Vaku ⁇ ums.
- the dry transformer core which is the enclosure gefer ⁇ Untitled primarily from a plastic.
- polyme ⁇ rer solids is understood, which is produced synthetically or semisynthetic table of monomeric organic molecules or biopolymers. Plastics usually meet the ⁇ He bachis the non-magnetisability are easy to mold and have sufficient stability.
- the enclosure is predominantly made of steel.
- non-magnetic steels such.
- chromium-nickel steels are used, which have a corresponding permeability.
- such steels are comparatively flexible malleable and have the time required for stabilization ⁇ tion of the iron core strength.
- steels are electrically conductive, so that electric field strength peaks are reduced, especially when the enclosure is rounded.
- the housing is also grounded.
- the enclosure is designed in several parts, one of the parts essentially enclosing one of the yokes.
- the enclosure should be designed so ⁇ to that of the iron core inserted in its individual sections can be assembled and joined together.
- the enclosure is designed so that coils can be guided over the individual iron core legs and their Umhausungsteil, and then a yoke can be applied. This is in turn enclosed by corresponding housing units.
- the enclosure on its outside on a number of fastening devices. This can include both the fastening devices for the installation of the transformer itself, as well as for the attachment of the windings.
- the iron core is advantageously made of amorphous films. Especially with such iron cores, which need to be stabilized without housing particularly complex and where attachment is particularly difficult to accomplish, the use of a housing with corresponding fastening devices of very particular advantage.
- the enclosure advantageously comprises an insulating part, which is designed such that no closed Lei ⁇ terschleife formed around the iron core.
- an electrically conductive housing it is necessary to design these with a non-conductive interruption, which can be arranged virtually arbitrarily, only topologically so expanded and arranged that no closed loop can be formed around the iron core. As a result, namely short circuit turns are avoided.
- the interruption can be made of a suitable insulating material.
- a dry-type transformer advantageously comprises a ⁇ be written dry transformer core and a plurality of coil wound around the area enclosed by the enclosure leg SPU len.
- a trained according to the aforementioned type of dry transformer is advantageously for a rated voltage of more designed as 1 kV and / or a rated power of more than 50 kVA.
- the enclosure of the iron core described above is of considerable advantage in the design.
- the dry-type transformer is advantageously designed as a cast-resin transformer, ie the insulation of the high-voltage windings consists of cast resin.
- the advantages achieved by the invention are, in particular, that the mechanical strength of the dry transformer core is ensured by the installation of the iron core in a non ⁇ magnetic housing as a supporting component, without consuming core bandages, core fittings or core pressing devices would be needed. The result is a completely encapsulated iron core, which is protected against corrosive influences. In addition, the noise level is reduced, as this is essentially generated by the magnetostriction of the iron core, which is shielded by the housing.
- the shape of the enclosure can follow the iron core shape and can also be made for round, oval or rectangular iron core sections.
- the assembly of the enclosure can take place with consideration of an insulation site with all known joining methods.
- 3 is a dry-type transformer core having a rectangular cross-section in the leg enclosure, which surrounds the iron core and having a plurality of Be ⁇ fastening devices.
- dry-type formatorkerne 1 which are designed for cast resin transformers having a rated voltage exceeding 1 kV, and / or a power rating of more than 50 kVA and accordingly have a entspre ⁇ sponding size. They are particularly suitable as power transformers in electrical energy networks. In the following, the similarities of the three figures will first be described.
- the dry-type transformer cores 1 have shown ei ⁇ NEN layered sheets of electro iron core 2.
- the core consists of amorphous films is established. He is shown in dashed lines in all figures, since he is located within the housing 4.
- the electrical steel sheets have a dimension which decreases in height and width toward the edge of the iron core 2, so that steps 6 are formed in each layer by the smaller dimension in the stacked electrical steel sheets. As a result, a slightly rounded shape of the iron core 2 is achieved. In other, not shown embodiments, it may also be economical, for.
- amorphous sheets have a rectangular core cross-section without rounding of the edges.
- transformers between sheath transformers and core transformers, or the terms in English "shell type” and "core type".
- the windings comprise a common iron core 2.
- the dry-transformer cores 1 shown in the figures are designed for core transformers.
- the leg 8 to be wound (also main leg) are connected at their ends by yokes 10 with each other.
- the design of transformer cores is specified in a coding consisting of two numbers. The first number describes the number of wound limbs 8, the second number the number of backlash limbs (this refers to outer, unwound limbs of the shell transformer).
- the housing 4 is made in all figures of a non-magnetic material, ie a material having a Per ⁇ meabilticiansress in the range of -1.01 to 1.01.
- a non-magnetic material ie a material having a Per ⁇ meabilticiansress in the range of -1.01 to 1.01.
- a plastic or in other exemplary embodiments chromium-nickel steel can be used.
- the enclosure 4 is formed in each case flush with the iron core 2, that is formed such that it holds together the iron plates of the iron core 2 ⁇ form fit. It completely encloses the iron core 2, thus encapsulating it.
- the enclosure 4 in this case has in each case a wall thickness of we ⁇ niger than 1 cm, ie a few mm. Between the iron core 2 and enclosure 4 remaining void is filled with a suitable material.
- the enclosure 4 is in each case designed in several parts. First, a first part 12 is provided, which surrounds the upper yoke 10 and a second part 14, which surrounds the legs 8 and the lower yoke 10. Both parts 12, 14 are in turn constructed in two parts as half-shells, so that in the manufacturing process, the iron core 2 can be inserted into the first half-shell and then connected the two ⁇ te half-shell for stabilization with the first half-shell.
- FIG. 1 shows a dry-transformer core 1 with a casing 4 with a round cross section over the yokes 10 and legs 8. It follows the outer contour of the iron core 2.
- FIG. 2 shows a dry-transforming core 1 with a casing 4, likewise round in cross-section, over the yokes 10 and legs 8, which is shaped in the same way as the enclosure in FIG. 4. However, it also has fastening devices 16, 18 in the manner from the outside Housing 4 attached eyelets. There are fastening devices 16 for fixing the dry-transformer core 1 during installation of the
- the housing 4 is made in FIG 2 of an electrically conductive material, for. As the already mentioned chromium-nickel steel.
- the housing 4 is initially grounded.
- it comprises two insulating parts 22 shown in FIG. 2, which are designed such that no closed conductor loop can form around the iron core 2.
- the sides of the insulating members 22 each form a rectangle whose sides parallel to the axis of the respective leg 8 and yoke 10 on the inside, ie the adjacent leg 8 or yoke 10 facing surface of the conversion 4 and here form a closed line.
- the insulating parts 22 un ⁇ teritul here the otherwise conductive body of the casing 4. Due to the sides of the insulating parts 22 is a current flow avoided in the transformation 4 around the legs 10 and yokes 8 around.
- FIG. 3 shows a dry-transforming core 1 whose casing 4 has the same fastening devices 16, 18 as that of FIG. However, the cross-section of the casing 4 over the yokes 10 and legs 8 is rectangular.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/510,912 US10361024B2 (en) | 2014-09-29 | 2015-09-16 | Dry-type transformer core |
BR112017006229A BR112017006229A2 (pt) | 2014-09-29 | 2015-09-16 | núcleo de transformador do tipo seco |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14186803.4A EP3001435B1 (de) | 2014-09-29 | 2014-09-29 | Trockentransformatorkern |
EP14186803.4 | 2014-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016050515A1 true WO2016050515A1 (de) | 2016-04-07 |
Family
ID=51619086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/071235 WO2016050515A1 (de) | 2014-09-29 | 2015-09-16 | Trockentransformatorkern |
Country Status (5)
Country | Link |
---|---|
US (1) | US10361024B2 (de) |
EP (1) | EP3001435B1 (de) |
BR (1) | BR112017006229A2 (de) |
DK (1) | DK3001435T3 (de) |
WO (1) | WO2016050515A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10650954B2 (en) * | 2016-09-16 | 2020-05-12 | Energo Group Canada Inc. | Losses reduction for electrical power distribution |
DE102017223839A1 (de) * | 2017-12-28 | 2019-07-04 | Siemens Aktiengesellschaft | Magnetkern mit Rückschlussschenkel |
US10826297B2 (en) * | 2018-11-06 | 2020-11-03 | General Electric Company | System and method for wind power generation and transmission in electrical power systems |
CN110632427B (zh) * | 2019-10-08 | 2022-02-01 | 云南电力技术有限责任公司 | 一种配电变压器中铁心柱结构的判断方法及装置 |
DE102020211253A1 (de) * | 2020-09-08 | 2022-03-10 | Siemens Energy Global GmbH & Co. KG | Transformator |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011107387A1 (de) * | 2010-03-01 | 2011-09-09 | Abb Technology Ag | Trockentransformatorkern mit einem amorphen transformatorkern und trockentransformator |
US20110248808A1 (en) * | 2010-04-07 | 2011-10-13 | Abb Technology Ag | Outdoor dry-type transformer |
US20130162386A1 (en) * | 2011-12-23 | 2013-06-27 | Abb Technology Ag | Corrosion-resistant coating system for a dry-type transformer core |
-
2014
- 2014-09-29 DK DK14186803.4T patent/DK3001435T3/en active
- 2014-09-29 EP EP14186803.4A patent/EP3001435B1/de not_active Not-in-force
-
2015
- 2015-09-16 WO PCT/EP2015/071235 patent/WO2016050515A1/de active Application Filing
- 2015-09-16 US US15/510,912 patent/US10361024B2/en not_active Expired - Fee Related
- 2015-09-16 BR BR112017006229A patent/BR112017006229A2/pt active Search and Examination
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011107387A1 (de) * | 2010-03-01 | 2011-09-09 | Abb Technology Ag | Trockentransformatorkern mit einem amorphen transformatorkern und trockentransformator |
US20110248808A1 (en) * | 2010-04-07 | 2011-10-13 | Abb Technology Ag | Outdoor dry-type transformer |
US20130162386A1 (en) * | 2011-12-23 | 2013-06-27 | Abb Technology Ag | Corrosion-resistant coating system for a dry-type transformer core |
Also Published As
Publication number | Publication date |
---|---|
BR112017006229A2 (pt) | 2017-12-12 |
US20170271070A1 (en) | 2017-09-21 |
US10361024B2 (en) | 2019-07-23 |
DK3001435T3 (en) | 2018-01-22 |
EP3001435A1 (de) | 2016-03-30 |
EP3001435B1 (de) | 2017-11-15 |
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