EP3363029B1 - Transformateur sec compact doté d'un enroulement électrique et procédé de réalisation d'un enroulement électrique - Google Patents
Transformateur sec compact doté d'un enroulement électrique et procédé de réalisation d'un enroulement électrique Download PDFInfo
- Publication number
- EP3363029B1 EP3363029B1 EP17702601.0A EP17702601A EP3363029B1 EP 3363029 B1 EP3363029 B1 EP 3363029B1 EP 17702601 A EP17702601 A EP 17702601A EP 3363029 B1 EP3363029 B1 EP 3363029B1
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- European Patent Office
- Prior art keywords
- coating
- formulation
- filler
- electrical winding
- winding
- Prior art date
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Images
Classifications
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- 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
-
- 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
-
- 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
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
-
- 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
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
-
- 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
- H01F2027/329—Insulation with semiconducting layer, e.g. to reduce corona effect
Definitions
- the invention relates to the coating of an insulating body of a dry-type transformer.
- Dry transformers are power transformers that are used in power engineering to transform voltages of up to approx. 36 kV on the high-voltage side.
- a low-voltage winding and a high-voltage winding are arranged coaxially around one leg of a core.
- the winding with the lower voltage is referred to as the low-voltage winding
- the winding with the higher voltage is referred to as the high-voltage winding.
- Both windings are embedded in a solid insulating material; in the case of the high-voltage winding, a casting resin is often used for this.
- Such a dry-type transformer is out of the EP 1133779 B1 famous.
- a coating which is preferably made of a semiconducting material, is provided on the surface of the solid insulating body in which an electrical winding, that is to say in particular an upper and / or lower voltage winding wound into a coil, is embedded.
- a transformer with first and second windings is known, the windings being embedded in a resin such as an epoxy resin and / or a urethane resin.
- an electrical winding according to claim 1 in particular a high-voltage winding, is provided for a dry-type transformer with a winding conductor that is wound in several turns to form a coil, the coil being embedded in a solid insulating body, with a coating on at least one surface of the insulating body a certain sheet resistance is provided, the coating by applying a formulation, which as Solvent contains water, can be produced and a resin component and at least one Comprises microscale and electrically conductive filler, where electrically conductive filler is present in a particle size in the range of 1 ⁇ m to 2 mm, the coating is filled at least bimodally, i.e. at least two filler particle fractions are present in the coating and that by setting the ratio of at least two filler particle fractions in the formulation of the defined sheet resistance of the coating can be adjusted.
- a formulation which as Solvent contains water
- the winding conductor can be a foil conductor, a strip conductor or a wire conductor.
- the coil is embedded in an insulating body made of a solid insulating material. A casting resin is often used for this, with which the coil is cast and which is cured after the casting. The result is a mechanically stable winding in the form of a hollow cylinder, the coil of which is well protected from environmental influences.
- a coating of a resin mixture with a microscale and electrically conductive filler according to claim 1 is applied to at least one surface of the insulating body.
- the filler is in the form of at least one microscale filler fraction whose filler content makes up more than 20% by weight and / or more than 10% by volume of the coating.
- At least two filler particle fractions in the coating There are at least two filler particle fractions in the coating. It is particularly advantageous if the at least two filler fractions have microscale filler particles.
- a particular advantage here is that a defined sheet resistance can be determined by the ratio in which at least two filler fractions are present in the coating.
- the coating can be produced by applying a formulation.
- a processable, ie preferably flowable, mixture of an uncured resin component with a hardener, either as two separate components or in one component, is mixed with filler and applied in solution to a surface.
- This formulation is then cured on the surface, for example by a thermal and / or UV-initiated reaction, to form the finished coating.
- the resin matrix is in the form of a 2-component system made up of resin and hardener.
- a water-soluble 2-component system is particularly advantageous because organic solvents, which are generally considered to be environmentally hazardous, are avoided in the production of the coating.
- Hardener and / or resin components can be processed in an aqueous solution.
- a one- or two-component resin system is used, which is environmentally friendly, through the use of water-based solvents.
- aqueous polyurethane-acrylate resin system more far-reaching ecological aspects can be implemented, such as dispensing with recycling or post-combustion of the solvent. This also facilitates occupational safety for the operator and / or the manufacturer, such as a painter, for example.
- water-based solvents are sufficient for producing the formulation which is applied to at least one surface of the insulating body to produce the coating.
- a material is considered to be electrically conductive if the electrical resistance is less than 10 8 ⁇ / ⁇ .
- a material is considered an insulator or non-conductive.
- the coating should be applied at least to the inner circumferential surface of the insulating body, preferably also to the end faces.
- the coating is particularly preferably applied to the entire surface of the insulating body, that is to say in addition to the inner circumferential surface and the end faces also on the outer circumferential surface.
- the electrical field of the electrical winding is largely reduced in the cast resin and is thus reduced outside the winding to a size that allows the distance to other components of the transformer such as the core or low-voltage winding to be smaller, which makes it more compact Construction allows.
- the coating is preferably made of a semiconducting material.
- a material is regarded as semiconducting among experts and within the meaning of the invention if its specific resistance is less than 10 8 ⁇ / ⁇ and greater than 10 1 ⁇ / ⁇ . Since an electrically conductive coating, in particular one of the entire surface, of a winding represents a short-circuit winding, a current will flow in this which represents a power loss generated. This power loss can be limited with a coating made of a semiconducting material.
- Suitable conductive or semiconducting coatings are based on a resin system into which a microscale semiconducting filler is incorporated, advantageously in an amount of more than 20% by weight and / or 10% by volume, in particular in the range from 20% by weight to 80% by weight, particularly preferred between 50% by weight and 60% by weight and / or the corresponding volume percentage limits in the case of light, in particular hollow, filler particles.
- a two-component resin system with a first component selected from the group of the following resins: epoxy, polyurethane, acrylate, polyimide and / or polyester resin system, and any mixtures, copolymers and blends of the aforementioned resins is suitable for this.
- a second component for example, a hardener tailored to the respective resin, such as amine, acid anhydride, peroxide, polyisocyanate, in particular aliphatic polyisocyanate, is added to the formulation.
- a water-soluble hardener component is used because of its environmental compatibility, because the solvent does not need to be burned afterwards and the use of organic solvents is generally environmentally disadvantageous in terms of sustainability.
- the formulation has a certain processing time in which it is applied as an uncrosslinked formulation for coating on at least one surface of the insulating body.
- the application is carried out, for example, by spraying, spraying, brushing, rolling and / or by immersion.
- the formulation crosslinks and achieves stability with respect to environmental influences, solar radiation, mechanical stress, etc.
- Crosslinking is supported, for example, by heating.
- the coating has a stability at temperatures of up to 170.degree.
- the defined electrical conductivity is achieved by adding two filler fractions. At least two fractions of a microscale filler are added to the formulation. This is present in the dry matter of the formulation and / or in the coating in an amount of more than 20% by weight and / or 10% by volume, it can even be present in an amount of up to 80% by weight of the dry matter, but is preferably in the range from 35% by weight to 75% by weight, in particular from 40% by weight to 60% by weight of the dry matter of the formulation and / or the corresponding percent by volume in the case of light filler particles.
- the filler used is a microscale filler with an average grain size D 50 in the range from 1 ⁇ m to 2 mm.
- the mean grain size is advantageously in the range from 5 ⁇ m to 100 ⁇ m, particularly preferably in the range from 10 ⁇ m to 50 ⁇ m.
- the filler can comprise all types of filler particle shapes.
- globular fillers can be mixed with platelet-shaped fillers.
- the limit of at least 20% by weight is assumed as the lower limit by the corresponding volume percent, for example approximately 10 volume%.
- the filler particles are preferably made of semiconducting material.
- the material can be conductive carbon black, conductive graphite, graphite, metal oxide and / or metal nitride and any mixtures thereof.
- the filler particles can equally well comprise a core with a shell or a core with a coating.
- the filler particles can also be hollow; in particular, hollow fibers and / or hollow spheres can also be used for the purposes of the invention alone or in combination with other filler particle fractions.
- a core made of, for example, mica and coated with semiconducting material is used as filler.
- a filler made of a quartz powder with a coating and any mixtures of coated and uncoated filler particles are also used here as filler.
- Both metals, metal oxides and doped metal oxides are advantageously used as semiconducting coatings.
- Semiconducting hollow spheres, hollow fibers or shells can also be used as filler particles. The lower limit for these very light filler particles is then approximately 10 percent by volume of the filling level in the coating.
- the fillers can be used multimodally, that is to say in different filler particle sizes and / or filler particle shapes.
- a wide range of properties can be created in the coating through a suitable choice of material of the filler particles, filler particle size, filler particle shape, filler particle structure, grain size distribution, size of the specific surface and / or surface activity of the filler.
- the coating preferably has a specific sheet resistance, also called sheet resistance, of 10 2 ⁇ / ⁇ to 10 5 ⁇ / ⁇ , preferably 10 3 ⁇ / ⁇ to 10 4 ⁇ / ⁇ .
- the electrical winding exhibits this sheet resistance when it is new. This can change as a result of aging, environmental influences or pollution.
- a sheet resistance of this order of magnitude limits the power loss particularly effectively, on the other hand, it still offers enough leeway for a reduction in surface resistance due to contamination.
- the thickness of the coating is at least in the range of the filler particle size, for example in the range from 1 ⁇ m to 5 mm, preferably in the range from 30 ⁇ m to 500 ⁇ m, in particular in the range from 70 ⁇ m to 130 ⁇ m.
- a mixture of a filler fraction with coated filler particles such as mica particles coated with semiconducting metal oxide, and a filler fraction of a semiconducting material such as a conductive carbon black is used in the formulation for the coating.
- the two filler fractions can, for example, be present in a ratio of 1: 1 or there can be different amounts, the ratios of coated filler particles to uncoated filler particles in the range from 0.5 to 2.5, preferably from 0.7 to 1.5 and in particular preferably from 0.8 to 1.2 are in use.
- the coating is applied by brushing and / or a spraying process.
- application by spraying ensures, on the one hand, a uniform layer thickness and, on the other hand, prevents air inclusions, which would lead to partial discharges.
- the coating is electrically grounded. As a result, the electric field outside the winding is particularly effectively reduced.
- the coating can be applied to the entire surface or only to parts of the surface of the insulating body, as already described.
- the insulating body is made of an epoxy resin, for example, a certain surface roughness of the insulating body on the sides to be coated being advantageous for the adhesion of the coating to the surface.
- a dispersing additive for example a surfactant and / or an ionic-based additive, can be added to the formulation.
- Such a method can be used to produce an electrical winding, the electrical field of which is largely shielded by the coating, and which, when used in a dry-type transformer, enables a more compact design.
- the coating is preferably a lacquer.
- the coating can be applied by spraying, spraying, brushing, rolling and / or as a dip coating. Several of the processes mentioned can be used in succession or at the same time to apply the formulation.
- the surface of the insulating body is treated before the formulation is applied, so that good adhesion of the formulation and then the coating on the insulating body are ensured.
- the coating is preferably made of a semiconducting material.
- the coating is particularly preferably applied in a spray process, as a result of which a particularly uniform layer thickness can be achieved.
- Figure 1 shows a graph in which the aging of a semiconducting coating according to the present invention is shown within 150 days at 170 ° C. After the coating has solidified within the first few days, a stable retention of the defined sheet resistance can be seen despite the storage at 170 ° C during the entire observation period of at least half a year.
- Resin component for example an acrylate or polyurethane or a polyurethane-acrylate mixture 530
- Hardener component for example an isocyanate or polyisocyanate 162 Coated mica 300
- Conductive particle filler such as graphite 300 Dispersing additive + 30% (filler) 180 Total mass (dry): 1180
- the invention relates to an electrical winding for a dry-type transformer, which allows a compact dry-type transformer to be built even with higher voltage classes.
- the electrical winding has several turns of a winding conductor wound into a coil.
- the coil is embedded in a solid insulating body.
- an electrical winding in particular high-voltage winding, for a dry-type transformer with winding conductor, which is wound in several turns to form a coil, the coil being embedded in a solid insulating body, is provided, with a coating with a specific sheet resistance being provided on at least one surface of the insulating body is,
- the coating can be produced by applying a formulation which contains water as a solvent and comprises a resin component and at least one microscale and electrically conductive filler, the filler having a particle size in the range from 1 ⁇ m to 2 mm, the coating being at least bimodal , that is, at least two filler particle fractions are present in the coating and that the defined sheet resistance of the coating can be set by setting the ratio of at least two filler particle fractions in the formulation.
- a coating of an electrically conductive material comprising a resin matrix and microscale filler, is applied to at least one surface of the insulating body.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Paints Or Removers (AREA)
- Insulating Of Coils (AREA)
Claims (13)
- Enroulement électrique, notamment enroulement de haute tension, d'un transformateur à sec ayant un conducteur d'enroulement, qui est enroulé en plusieurs spires en une bobine, la bobine étant incorporée dans un corps solide isolant, dans lequel il est prévu sur au moins une surface du corps isolant un revêtement ayant une résistance de couche déterminée, le revêtement peut être produit par dépôt d'une formulation qui contient de l'eau comme solvant et qui comprend un constituant de résine, ainsi qu'au moins une charge à l'échelle microscopique et conductrice de l'électricité, dans lequel la charge est présente en une granulométrie dans la plage de 1µm à 2mm, le revêtement est au moins bimodal, donc au moins deux fractions de particule de charge sont présentes dans le revêtement et en ce que la résistance de couche définie du revêtement, peut être réglée en réglant le rapport d'au moins deux fractions de particules de charge dans la formulation.
- Enroulement électrique suivant la revendication 1,
dans lequel la charge représente plus de 20% du poids et/ou plus de 10% du volume du revêtement. - Enroulement électrique suivant la revendication 1 ou 2,
dans lequel le revêtement recouvre complètement la surface du corps isolant. - Enroulement électrique suivant l'une des revendications précédentes,
dans lequel le revêtement est en un matériau semi-conducteur. - Enroulement électrique suivant l'une des revendications précédentes,
dans lequel la résistance de surface du revêtement va de 102 Ω/□ à 105 Ω/□, de préférence de 103 Ω/□ à 104 Ω/□. - Enroulement électrique suivant l'une des revendications précédentes,
dans lequel la formulation de production du revêtement peut être déposée par un procédé de pulvérisation. - Enroulement électrique suivant l'une des revendications précédentes,
dans lequel le revêtement est mis à la terre. - Enroulement électrique suivant l'une des revendications précédentes,
dans lequel la résistance de couche définie du revêtement peut être réglée en réglant le rapport des particules de charge revêtues à non revêtues dans la formulation. - Procédé de fabrication d'un enroulement électrique suivant la revendication 1 comprenant les stades de procédé :- enroulement d'un conducteur d'enroulement en plusieurs spires en une bobine,- incorporation de la bobine dans un corps solide isolant, de préférence en l'entourant par coulée d'une résine de coulée et en durcissant ensuite le corps isolant,- réglage d'un rapport déterminé d'au moins deux fractions de particules de charge en charges à l'échelle microscopique dans une formulation pour la production d'un revêtement d'une résistance de couche déterminée à l'avance,- dépôt de la formulation pour la production du revêtement sur au moins une surface du corps isolant, dans lequel- on dépose la formulation sous la forme d'une solution à base d'eau.
- Procédé suivant la revendication 9,
dans lequel on dépose le revêtement sur toute la surface du corps isolant. - Procédé suivant l'une des revendications 9 ou 10,
dans lequel le revêtement est en un matériau semi-conducteur. - Procédé suivant l'une des revendications 9 à 11,
dans lequel on produit le revêtement par pulvérisation d'une formulation et ensuite durcissement. - Procédé suivant l'une des revendications 9 à 12,
dans lequel on dépose la formulation par vernissage, projection, enduction, revêtement au rouleau et/ou vernissage par immersion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016202391.8A DE102016202391A1 (de) | 2016-02-17 | 2016-02-17 | Kompakter Trockentransformator mit einer elektrischen Wicklung und Verfahren zur Herstellung einer elektrischen Wicklung |
PCT/EP2017/051934 WO2017140482A1 (fr) | 2016-02-17 | 2017-01-30 | Transformateur sec compact doté d'un enroulement électrique et procédé de réalisation d'un enroulement électrique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3363029A1 EP3363029A1 (fr) | 2018-08-22 |
EP3363029B1 true EP3363029B1 (fr) | 2021-07-28 |
Family
ID=57956280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17702601.0A Active EP3363029B1 (fr) | 2016-02-17 | 2017-01-30 | Transformateur sec compact doté d'un enroulement électrique et procédé de réalisation d'un enroulement électrique |
Country Status (7)
Country | Link |
---|---|
US (1) | US11569026B2 (fr) |
EP (1) | EP3363029B1 (fr) |
CN (1) | CN108701534B (fr) |
BR (1) | BR112018015583B1 (fr) |
DE (1) | DE102016202391A1 (fr) |
RU (1) | RU2711349C1 (fr) |
WO (1) | WO2017140482A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016202391A1 (de) | 2016-02-17 | 2017-08-31 | Siemens Aktiengesellschaft | Kompakter Trockentransformator mit einer elektrischen Wicklung und Verfahren zur Herstellung einer elektrischen Wicklung |
AT518664B1 (de) | 2016-04-22 | 2017-12-15 | Trench Austria Gmbh | HGÜ-Luftdrosselspule und Verfahren zur Herstellung |
EP3791413B1 (fr) | 2018-06-07 | 2023-08-02 | Siemens Energy Global GmbH & Co. KG | Ensembles bobine blindés et procédés pour transformateurs de type sec |
CN111091967B (zh) * | 2018-10-24 | 2021-11-19 | 哈尔滨工业大学 | 一种磁聚焦霍尔推力器的线圈固化方法 |
CN113223814B (zh) * | 2021-05-07 | 2023-03-24 | 浙江江山变压器股份有限公司 | 一种采用聚氨酯树脂浇注成型的干式变压器及其加工方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008031015A1 (fr) * | 2006-09-08 | 2008-03-13 | Sun Chemical Corporation | Encre très conductrice à base d'eau |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1156369A (en) * | 1966-04-08 | 1969-06-25 | Gen Electric | Coated Electrostatic Shields for Electrical Apparatus |
GB1145450A (en) * | 1966-04-08 | 1969-03-12 | Gen Electric | Method of making conductive coatings on the surface of an encapsulated electrical device |
CA898921A (en) * | 1968-04-11 | 1972-04-25 | Trench Electric Limited | Metalized encapsulated coil and method of making the same |
US3517361A (en) * | 1968-06-19 | 1970-06-23 | Stevens Arnold Inc | Shielded transformer |
SU1645026A1 (ru) * | 1988-06-27 | 1991-04-30 | Научно-Производственное Объединение "Саниири" | Способ получени изол ционных покрытий |
US5545250A (en) * | 1993-07-30 | 1996-08-13 | E. I. Du Pont De Nemours And Company | Polytype electroconductive powders |
RU2107350C1 (ru) * | 1996-08-09 | 1998-03-20 | Акционерное общество открытого типа "Свердловский завод трансформаторов тока" | Литой трансформатор |
DE19823867A1 (de) * | 1998-05-28 | 1999-12-02 | Merck Patent Gmbh | Pigmentmischung |
FR2784787B1 (fr) * | 1998-10-20 | 2002-10-11 | France Transfo Sa | Transformateur sec de puissance ou de distribution de l'energie electrique |
DE19854439C2 (de) | 1998-11-25 | 2000-10-12 | Siemens Ag | Transformator - insbesondere Giessharztransformator |
US9214273B2 (en) * | 2013-06-11 | 2015-12-15 | Abb Technology Ag | Radial drop winding for open-wound medium voltage dry type transformers with improved support structure |
EP3144944A1 (fr) | 2015-09-18 | 2017-03-22 | Siemens Aktiengesellschaft | Bobine electrique, transformateur sec dote d'une telle bobine electrique et procede de fabrication d'une bobine electrique |
DE102016202391A1 (de) | 2016-02-17 | 2017-08-31 | Siemens Aktiengesellschaft | Kompakter Trockentransformator mit einer elektrischen Wicklung und Verfahren zur Herstellung einer elektrischen Wicklung |
-
2016
- 2016-02-17 DE DE102016202391.8A patent/DE102016202391A1/de not_active Withdrawn
-
2017
- 2017-01-30 BR BR112018015583-7A patent/BR112018015583B1/pt active IP Right Grant
- 2017-01-30 WO PCT/EP2017/051934 patent/WO2017140482A1/fr active Application Filing
- 2017-01-30 RU RU2018129877A patent/RU2711349C1/ru active
- 2017-01-30 CN CN201780011614.1A patent/CN108701534B/zh active Active
- 2017-01-30 EP EP17702601.0A patent/EP3363029B1/fr active Active
- 2017-01-30 US US15/999,519 patent/US11569026B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008031015A1 (fr) * | 2006-09-08 | 2008-03-13 | Sun Chemical Corporation | Encre très conductrice à base d'eau |
Also Published As
Publication number | Publication date |
---|---|
US11569026B2 (en) | 2023-01-31 |
CN108701534B (zh) | 2021-12-10 |
DE102016202391A1 (de) | 2017-08-31 |
BR112018015583B1 (pt) | 2023-05-09 |
US20210210279A1 (en) | 2021-07-08 |
BR112018015583A8 (pt) | 2023-04-11 |
BR112018015583A2 (pt) | 2018-12-26 |
WO2017140482A1 (fr) | 2017-08-24 |
RU2711349C1 (ru) | 2020-01-16 |
EP3363029A1 (fr) | 2018-08-22 |
CN108701534A (zh) | 2018-10-23 |
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