EP3503134A1 - Dispositif de retenue un noyau compact magnétique doux de transformateur et transformateur - Google Patents

Dispositif de retenue un noyau compact magnétique doux de transformateur et transformateur Download PDF

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Publication number
EP3503134A1
EP3503134A1 EP17209160.5A EP17209160A EP3503134A1 EP 3503134 A1 EP3503134 A1 EP 3503134A1 EP 17209160 A EP17209160 A EP 17209160A EP 3503134 A1 EP3503134 A1 EP 3503134A1
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EP
European Patent Office
Prior art keywords
holding
transformer
holding device
coil
stack core
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
Application number
EP17209160.5A
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German (de)
English (en)
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EP3503134B1 (fr
Inventor
Bertram Ehmann
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Individual
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Individual
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Filing date
Publication date
Priority to RS20200478A priority Critical patent/RS60246B1/sr
Application filed by Individual filed Critical Individual
Priority to EP17209160.5A priority patent/EP3503134B1/fr
Priority to HUE17209160A priority patent/HUE049879T2/hu
Priority to ES17209160T priority patent/ES2785661T3/es
Priority to SI201730232T priority patent/SI3503134T1/sl
Priority to PT172091605T priority patent/PT3503134T/pt
Priority to PL17209160T priority patent/PL3503134T3/pl
Priority to PCT/EP2018/086077 priority patent/WO2019122067A1/fr
Priority to SG11202005608YA priority patent/SG11202005608YA/en
Priority to PE2020000774A priority patent/PE20210831A1/es
Priority to BR112020012467-2A priority patent/BR112020012467A2/pt
Publication of EP3503134A1 publication Critical patent/EP3503134A1/fr
Application granted granted Critical
Publication of EP3503134B1 publication Critical patent/EP3503134B1/fr
Priority to HRP20200654TT priority patent/HRP20200654T1/hr
Priority to SA520412246A priority patent/SA520412246B1/ar
Priority to CL2020001634A priority patent/CL2020001634A1/es
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • 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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • 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
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • 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
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets

Definitions

  • the invention relates to a holding device for holding a soft magnetic transformer core stack with layers having an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy, wherein the transformer core has at least two mutually parallel coil legs and two yokes connected to opposite ends of the coil legs , and wherein the holding device at least two holding units, each of which can be arranged on one of the two yokes, that the holding units are arranged at opposite end portions of the transformer stack core, and at least one attacking on the two holding units mechanical fixing means on the two holding units non-destructive releasably connected to each other.
  • the invention relates to a transformer, in particular a three-phase transformer, comprising at least one soft magnetic transformer core with layers having an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy, wherein the transformer stack core at least two mutually parallel coil legs and two opposite each other Ends of the coil legs having connected yokes, and at least one holding device for holding the transformer stack core.
  • a transformer in particular a three-phase transformer, comprising at least one soft magnetic transformer core with layers having an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy, wherein the transformer stack core at least two mutually parallel coil legs and two opposite each other Ends of the coil legs having connected yokes, and at least one holding device for holding the transformer stack core.
  • Transformers convert an AC input voltage into an AC output voltage that deviates from the AC input voltage. Transformers are used, for example, for voltage conversion in power supply systems and in electrical equipment.
  • a transformer has, for each phase of the alternating input voltage to be converted, a primary coil and a secondary coil, which are arranged on a common transformer core, which is made of ferromagnetic materials or ferrites.
  • the transformer core in conjunction with the coils, bundles the magnetic flux and increases the inductance and magnetic flux density of the transformer.
  • the transformer core may be formed from a laminated core of a plurality of transformer plates electrically insulated from one another. As a result, eddy current losses of the transformer can be reduced during the voltage conversion.
  • a three-phase transformer has a soft-magnetic transformer core, which has three mutually parallel coil legs and two respective end connected to the coil legs yokes. At each coil leg, a primary coil and a secondary coil of the same current phase are arranged. One of the yokes may be monolithically connected to the three coil legs, forming an E-shaped portion of the transformer core. After the coils have been arranged on the coil legs, the second yoke can be connected to the free ends of the coil legs.
  • DE 10 2009 048 658 A1 discloses a conventional transformer stack core comprising soft magnetic layers of an electrically conductive core material having an amorphous and / or nanocrystalline microstructure separated by separation layers of an electrically insulating material.
  • the transformer stack core thus consists of a laminated core, the transformer plates each consisting entirely of a monolithic composite of soft magnetic layers and separating layers.
  • a soft magnetic layer of an electrically conductive core material is electrochemically deposited on a base body.
  • An electrically insulating separating layer is produced on the soft magnetic layer.
  • the soft magnetic layer at least one soft magnetic element, in particular one or more of the elements iron (Fe), nickel (Ni) or cobalt (Co), and at least one glass-forming element, in particular phosphorus (P) and / or boron (B), in common deposited.
  • transformer stack core using soft magnetic amorphous layers involves a reduction in losses on the transformer stack core during its use in a transformer. This is due to the lower magnetic coercive field strength, so that hysteresis losses during magnetization reversal of the transformer stack core can be kept small.
  • DE 10 2011 083 521 A1 relates to a conventional press frame structure for a transformer with a plurality of tension elements, with a plurality of struts, which are at least partially designed obliquely projecting from a core of the transformer, and with a plurality of Wernerplatten, which are arranged at or in the vicinity of the core of the transformer.
  • the tension elements are arranged outside windings of the transformer. Based on the struts, the tension elements are connected to the Werpressplatten.
  • the tension elements connect the upper press frame of the transformer to the lower press frame of the transformer.
  • the tension elements cause the core to be clamped between the two press frames.
  • An object of the invention is to provide a more energy efficient transformer, in particular three-phase transformer, of the type mentioned.
  • a holding device is used to hold a soft-magnetic transformer stack core with layers having an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy, wherein the transformer stack core has at least two mutually parallel coil legs and two yokes connected to opposite ends of the coil legs.
  • the holding device has at least two holding units, each of which can be arranged on one of the two yokes, that the holding units are arranged at opposite end portions of the transformer stack core, and at least one acting on the two holding units mechanical fixing means over which the two holding units are non-destructively releasably connected to each other, on.
  • the holding device has at least one spacer clamped between the holding units and at least one spring element which can be arranged between at least one holding unit and the transformer stack core, wherein the holding device is configured such that the spring element is in contact with the transformer stack core arranged on the holding device by an at least indirect contact the transformer stack core is elastically deformed.
  • the holding device according to the invention is designed as a self-stable holding device, which means that the holding device can be brought into its holding state and held therein, without other components, such as the transformer stack core, supportive required to give the holding device stability.
  • the holding device according to the invention is therefore in particular not formed according to a conventional pressing frame, as he, for example, in DE 10 2011 083 521 A1 is disclosed.
  • a conventional pressing frame it is usually necessary to bring the pressing frame by means of the transformer core in a holding state and hold.
  • the transformer core is clamped between two frame elements, whereby relatively high clamping forces, for example in the amount of some 10,000 N, acting on the transformer core, in particular to ensure a sufficient frictional connection or frictional engagement between the layers of a conventional electrical steel core.
  • a transformer stack core ie a transformer core of several stacked layers, which are electrically insulated from each other and are made with an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy
  • mechanical stresses lead to a deterioration in energy efficiency and thus to higher losses of the transformer.
  • the magnetic permeability of the iron alloys decrease.
  • the magnetic permeability is a significant factor influencing the material-specific loss of magnetization loss (hysteresis loss).
  • the very high magnetic permeability of iron alloys with amorphous and / or nanocrystalline microstructure is disproportionately impaired by acting mechanical stresses. This reduces the energy efficiency of the transformer stack core and the efficiency of the transformer. This is avoided with the present invention, since with the holding device according to the invention only the restoring force generated by the elastic deformation of the at least one spring element acts on the transformer stack core, which are significantly reduced in comparison to the described conventional mechanical clamping forces.
  • the holding device due to the inherent stability of the holding device, no frictional engagement required conventionally between the press rims resting on the yoke and at the connection points of the coil legs and the individual layers of the core stacked from grain-oriented electrical steel sheets is necessary.
  • the at least one spring element only specified, preset forces for fixing or holding of transformer stack core or of coil windings are introduced into the inherently stable frame which minimally influence the transformer stack core.
  • the introduction of force for holding the transformer stack core is very small (may be, for example, about 0.5 N / mm 2 ) and is preset via the at least one spring element. Therefore, the energy efficiency of one with a transformer stack core having layers that are electrically insulated from each other and made with an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy, is not affected by the holding device according to the invention.
  • the two holding units for producing the holding state of the holding device by means of at least one acting on the two holding units mechanical fixing means are braced against each other via the at least one rigid spacer, so that the mechanical clamping forces absorbed by the spacer and not be transferred to the transformer stack core.
  • the two holding units can also be clamped against each other via two or more, for example four, mechanical fixing means. Between the two holding units can also be two or more, for example four, spacers clamped accordingly.
  • the spacer can be made, for example, from a metal, a metal alloy or another rigid or dimensionally stable material. The spacer may run in the immediate vicinity of a coil leg or be in contact with a coil leg, or be arranged spaced from the coil leg, that between the spacer and the coil leg a space for the coils to be arranged on the coil leg is present.
  • the only forces acting on the transformer stack core held by the holding device according to the invention are the restoring forces generated by the elastic deformation of the at least one spring element. Such restoring forces are significantly lower than the conventional applied with a press frame mechanical clamping forces.
  • the forces acting on the transformer stack core forces can thus be determined by the choice of the type and design of the spring element, the spring constant or modulus of elasticity causes the desired holding forces according to the present invention.
  • the spring element may in particular have a linear or non-linear force-displacement profile.
  • the transformer stack core can be acted upon by means of corresponding spring elements, for example in the x-direction, y-direction and z-direction with force.
  • a spring element may be arranged in the region of a blunt impact between a coil leg and a yoke.
  • the holding device may also have two or more corresponding spring elements which can be arranged at different locations between the respective holding unit or the holding units and the transformer stack core.
  • the spring element may be, for example, a body formed of an elastomer, which is arranged on a single side of the transformer stack body or on two or more sides of the transformer stack body or adapted to the shape thereof.
  • the elastomeric body may be formed, for example, cuboid, plate-shaped or the like.
  • the spring element as a compression spring for example, coil spring, coil spring or disc spring may be formed.
  • the holding device according to the invention is formed in its holding state such that the transformer core without the at least one spring element with a certain game is arranged on the holding device. Only by arranging the at least one spring element on the holding device and an indirect or at least one further component realized indirect contact of the transformer stack core with the spring element and the associated elastic deformation of the spring element is a positive connection between the transformer stack core and the holding device produced.
  • the at least one mechanical fixing means may be formed, for example, as a screw connection.
  • a threaded shaft of such a screw connection can run through the, for example, sleeve-shaped, spacers or be arranged outside and spaced from the spacer.
  • the sleeve-shaped spacer can be elongated and formed with a polygonal, for example, square or rectangular, or a round, for example, circular, elliptical or oval, cross-sectional area.
  • the holding device according to the invention also has the advantage that a mounting of coils on a transformer stack arranged on the holding device can be relatively easily performed by first the mechanical fixative or be solved so that then a holding unit can be removed, after which with this Holding unit pre-held yoke can be removed from the rest of the transformer stack core. Then, the coils can be applied to the coil legs of the transformer stack core, after which first the previously removed yoke on the rest of the transformer stack core and then again the previously removed holding unit can be arranged on the rest of the holding device. Finally, the mechanical fixing means are tightened again to bring about the holding state of the holding device.
  • the two holding units may each be formed in cross-section substantially U-shaped and arranged on the respective yoke, that they are not arranged exclusively on a side facing away from the respective yoke side of the respective yoke, but in addition a portion of the respective yoke on both sides laterally embrace, but without a positive connection between the respective holding unit and the respective yoke is given.
  • the respective yoke can be laterally supported both on its side facing away from the respective other yoke, and on its two longitudinal sides, in particular via at least one between the respective holding unit and the respective yoke arranged spring element, which is elastically deformed when arranged on the holding device transformer stack core thereby given at least indirect contact with the transformer stack core, in particular with its respective yoke.
  • two or more spring elements may be present for this support of the yoke.
  • the or the spring elements additionally cause a balance of manufacturing tolerances, whereby the required manufacturing accuracy of all components of the holding device and the transformer stack core can be reduced cost-reducing.
  • At least one holding unit has at least two holding elements which can be arranged on opposite yoke end regions of the respective yoke, at least one mechanical fixing means acting on the two holding elements, via which the two holding elements are non-destructively detachably connected to one another, at least one clamped between the holding elements Spacer and at least one can be arranged between at least one retaining element and the respective yoke spring element, wherein the holding unit is formed such that the spring element is elastically deformed when arranged on the holding device transformer stack core thereby given at least indirect contact with the transformer stack core.
  • the respective yoke can be fixed in the transverse direction by the yoke is clamped under elastic deformation of the spring element to the respective holding unit.
  • the at least one spring element between the at least one retaining element and the respective yoke additionally brings about a compensation of manufacturing tolerances, whereby the required manufacturing accuracy of all components of the holding device and the transformer stack core can be reduced to reduce costs.
  • the two holding elements are used to produce the holding state of the holding device by means of the at least one of the two holding elements engaging mechanical fixing means clamped against each other via the at least one rigid spacer between the holding elements, so that the mechanical clamping forces are absorbed by the spacer and not transmitted to the transformer stack core.
  • the two holding elements can also be braced against each other via two or more, for example four, mechanical fixing means. Two or more, for example, four spacers can be clamped accordingly between the two holding elements.
  • the spacer between the holding elements can be produced, for example, from a metal, a metal alloy or another rigid or dimensionally stable material.
  • the forces acting on the transformer stack core forces can be determined by the choice of the type and design of the spring element between the respective holding element and the yoke whose spring constant or modulus of elasticity causes the desired forces.
  • the holding device can also have two or more corresponding spring elements which can be arranged at different locations between the holding elements and the transformer stack core.
  • the spring element may be, for example, a body formed of an elastomer, which is arranged on a single side of the transformer stack body or on two or more sides of the transformer stack body or adapted to the shape thereof.
  • the spring element as a compression spring, for example, coil spring, coil spring or disc spring may be formed.
  • the at least one engaging on the holding elements mechanical fixing means may be formed, for example, as a screw connection.
  • a threaded shank of such a screw connection can run through the, for example, sleeve-shaped, spacers between the holding units or be arranged outside and spaced from this spacer.
  • the two holding elements may each be formed in cross section, for example, substantially S-shaped and arranged on the respective yoke, that they are not arranged exclusively on a side facing away from the other yoke side of the respective yoke, but in addition a portion of the respective yoke on one side embrace laterally.
  • This allows the respective yoke both its side facing away from the other yoke, as well as being laterally supported on its respective longitudinal side, in particular via at least one arranged between the respective holding element and the respective yoke spring element, which is arranged at the holding device transformer stack by a given thereby at least indirect contact with the transformer stack core , in particular with its respective yoke, is elastically deformed.
  • At least one spring element is U-shaped in such a way that it embraces the transformer stack core along at least a portion of the respective yoke such that there is a connection region between at least one coil leg and the respective yoke between parallel legs of the spring element.
  • the U-shaped spring element can embrace the respective yoke, for example, on the side facing away from the other yoke and at portions of the longitudinal sides adjoining it laterally.
  • connection region between the coil leg and the yoke is located between parallel legs of the spring element, this connection region is secured by the spring element in the course of a positive connection, which is particularly advantageous in a connection of the coil leg with the yoke via a blunt impact.
  • the holding device has at least one at least partially disposed between the spacer and the transformer stack core spring element, wherein the holding device is designed such that the spring element elastically deformed when arranged on the holding device transformer core by a given thereby at least indirect contact with the transformer stack core is.
  • a coil leg connected to equilateral end sections of the yokes can be supported laterally.
  • the end portion of one of these yokes can be supported frontally, wherein the spring element extends over a connection region between the yoke and the coil leg.
  • the spring element can be supported directly or indirectly on the spacer and / or the transformer stack core and can in this case form a positive connection with the spacer and / or the transformer stack core.
  • the holding device has at least one spacer which can be arranged between two adjacent mutually arranged coil legs, on which the two coil legs are laterally supported against one another.
  • the coil legs can be indirectly supported on each other, which is particularly advantageous in a blunt impact between the respective coil legs and the respective yoke, since then the, in particular form-fitting, connection between the coil legs and the yoke offers no lateral support.
  • the spacer is preferably made of a non-conductive material.
  • the spacer may be made of a rigid or resilient, in particular elastic, material.
  • the holding device has at least two support elements which can be arranged on opposite sides of a coil leg, which are each connected to the two holding units at the end, in particular in a form-fitting manner.
  • the support elements support the coil legs laterally via a positive connection and in this case transmit the supporting forces to the holding units.
  • Each support member may be formed, for example, plate-shaped or rod-shaped.
  • Recesses are formed on the holding units, in which engage the end portions of the support elements to be laterally supported on opposite sides.
  • the holding device has at least four coil support elements for axially supporting coils arranged on a coil leg, wherein two coil support elements are arranged on the one holding unit and the other two coil support elements on the other holding unit, wherein the coil support elements in pairs on opposite sides of Coil leg can be arranged.
  • the holding device per coil support element has at least one spring element arranged either between the respective holding unit and the respective coil support element or between the respective coil support element and the respective coils, wherein the holding device is designed in such a way that the spring element acts on the Holding device arranged transformer stack core with coils arranged thereon is elastically deformed by a given thereby at least indirect contact with the coils.
  • the spring elements according to this embodiment may each be formed, for example, of bodies made of an elastomer or as a compression spring.
  • the coil support members disposed in the vicinity of the respective holding unit may be connected to each other to form a monolithic Spulenabstütz redesign on which a separate opening is formed for each coil leg.
  • a recoverable force which can be applied with the respective spring element can be set separately.
  • the restoring force can be changed, for example, in hindsight, for example readjusted or increased, or optimized.
  • the spring element can be supported on a component of the holding device whose position is variable relative to the rest of the holding device. This component may for example be a screwed into a screw hole on a holding unit or on a holding element screw body. It can also be two or more, in particular all, be applied separately with the spring elements restoring forces.
  • a transformer according to the invention in particular a three-phase transformer, has at least one soft magnetic transformer core with layers having an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy, the transformer core having at least two mutually parallel coil legs and two opposite ends of the Coil legs connected yokes has. Furthermore, the transformer has at least one holding device for holding the transformer stack core, wherein the holding device according to one of the above-mentioned embodiments or any combination of at least two of these embodiments is formed with each other.
  • the iron alloy preferably contains at least a soft magnetic element, in particular one or more of the elements Fe, silicon (Si), Ni or Co, and at least one glass-forming element, in particular P and / or B.
  • the glass-forming element serves to form the amorphous and / or nanocrystalline microstructure of the respective amorphous Layer.
  • the amorphous layers are preferably electrically separated from each other.
  • At least one coil leg can be materially and / or positively connected to at least one yoke.
  • the transformer stack core it is possible, for example, to produce an E-shaped component which has a section designed as a yoke and three sections designed as coil legs.
  • a separate yoke can be connected after arrangement of the coils on the coil legs with the free ends of the coil legs.
  • the yokes may be cuboid, while the coil legs may each have a stepped cross-sectional area. Due to the rectangular configuration of the yokes they can be produced with less material, which reduces the cost of manufacturing the transformer.
  • At least one coil leg can be connected via an obtuse joint, ie at an angle of intersection of 90 °, with the respective yoke.
  • at least one coil leg may also be connected to the respective yoke using a different cutting angle, for example a cutting angle of 45 °.
  • the connecting portions of the respective coil leg and the respective yoke may be formed such that portions of the coil leg and the yoke overlap each other. The overlapping portions can be materially connected to each other.
  • a connecting portion of a coil leg may have so-called step-lap layering.
  • the individual coil legs of a transformer stack core can be formed in various ways and connected to the respective yoke.
  • at least one coil leg may be connected to at least two different of the mentioned types with at least one yoke.
  • At least one abutting surface of abutting surfaces of a coil leg and a yoke to be joined together may be at least partially physically and / or chemically treated.
  • the impact surface can be provided, for example, with a desired surface roughness.
  • the treatment of the To serve butt surface for producing a plane parallelism between joint surfaces to be joined. It is also possible to treat both joint surfaces to be joined together accordingly.
  • the physical treatment may, for example, be mechanical, in particular machining, and / or thermal and / or chemical, for example etching.
  • the transformer according to the invention it is possible for the assembly of coils on the coil legs first, the mechanical fixing means, over which the two holding units are interconnected to solve, and then after removal of the respective holding unit, the yoke thus held by the remaining transformer stack core to solve. Then the coils can be arranged on the coil legs.
  • This process is much simpler and faster to carry out than a conventional assembly process, in which initially thousands of windings of a transformer core manually laboriously stratified for arranging coils on coil legs and after the arrangement of the coils on the coil legs laboriously re-stacked manually. Due to the significantly faster possible production of the transformer according to the invention, the throughput of a plant for the production of corresponding transformers can be significantly increased.
  • the coil legs and the yokes are each formed by a stack of cohesively interconnected composite bodies, each composite body of cohesively interconnected, cut composite sections of a band-shaped Mehrkomponentenverbunds is formed, wherein the multi-component composite has at least two cohesively interconnected composite layers, each Composite layer is formed from a film composite, each film composite at least two band-shaped, soft magnetic films having an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy, wherein the films are materially interconnected. Each amorphous film forms an amorphous layer of the transformer stack core.
  • the transformer can be made cheaper and faster than, for example, the in DE 10 2009 048 658 A1 disclosed transformer, in particular because the individual layers of a transformer stack core not corresponding DE 10 2009 048 658 A1 be deposited sequentially, which is very time consuming.
  • the respective strip-shaped, soft magnetic film having an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy can be produced continuously using a casting process, which is significantly faster than conventional successive deposition of individual layers of specific shape and size.
  • a melt of the iron alloy can be produced, for example, using an induction melting furnace.
  • the melt can then be poured onto a rotating roll where the melt is progressively cooled to form the amorphous sheet or solidified to form the amorphous and / or nanocrystalline microstructure.
  • the amorphous film thus formed can be removed from the roller and, after possible further processing and / or processing steps, wound up into a film roll. For further process steps, the amorphous film can then be unwound again.
  • the continuous production of the amorphous film means that the amorphous film is not formed in a size and shape adapted to a size and a shape of a soft magnetic component to be manufactured, but is formed into an elongated band having a length of, for example, several tens of thousands m may have.
  • the thickness of the amorphous film may be, for example, in a range of about 20 ⁇ m to about 60 ⁇ m.
  • the maximum width of the amorphous film may, for example, be in a range from about 180 mm to about 300 mm, in particular up to about 400 mm. For example, with a thickness of about 25 ⁇ m, the length of the amorphous film may be 35,000 m.
  • the band-shaped film composite can be produced continuously by continuous, in particular planar or local, integral bonding of the amorphous film with at least one correspondingly produced further amorphous film, which is also significantly faster than the conventional production of a special film composite by depositing individual layers, such as for example DE 10 2009 048 658 A1 disclosed.
  • the two amorphous films can be unwound for continuous production of the band-shaped film composite, for example, simultaneously from different film rolls.
  • an adhesive may be applied to at least one of the two coiled-off film sections to form the material bond between the amorphous films the further unwinding of the amorphous films are applied continuously, for example by means of a job roll or by spraying the adhesive.
  • the adhesive may alternatively be applied in spots or in lines.
  • the adhesive forms an adhesive layer between each two adjacent mutually arranged amorphous films of the film composite, which may be electrically insulating to electrically separate the amorphous films from each other. As a result, eddy current losses at the transformer stack core can be kept as low as possible.
  • the adhesive layer can cause little or no electrical insulation, wherein the electrical separation of the amorphous films with one another can take place in a different manner.
  • at least one major side of an amorphous film for example, by a diffusion process or the like, may be treated such that a portion of the amorphous film adjacent to the main side has reduced electrical conductivity compared to the remaining amorphous film which is interconnected for electrical isolation amorphous films is used.
  • another agent for example an oil
  • another agent may be applied continuously to at least one of the two coiled-off film sections, which creates or reinforces adhesion between the amorphous films.
  • the agent may alternatively be applied punctiform or in lines.
  • the material bond between the amorphous films can be produced by at least one connecting side of at least one amorphous film being heated and thereby partially melted before the amorphous films are combined, so that the molten material of this amorphous film on the other amorphous film solidifies and causes the substance.
  • the amorphous film can also be combined with two or more, for example two to seven, further amorphous films for producing the film composite, the film composite thereby having a corresponding number of film layers.
  • the film composite can then be unwound into a film composite roll in order to be available for further processing and / or processing steps.
  • a film composite with five layers of amorphous films having a respective thickness of about 25 ⁇ m can be produced, for example, with a length of about 7,000 m become.
  • the thickness of the film composite may be, for example, in a range of about 40 microns to about 400 microns.
  • At least one electrically insulating separating layer can be applied to the film composite continuously on at least one side in a continuous manner or formed on the film composite. This is particularly advantageous if the film composite is to be later connected to at least one further film composite produced accordingly, since then the film composites for the reduction of eddy current losses are electrically separated from each other.
  • an electrically insulating adhesive can also be used to connect the film composites. It is also possible to arrange an electrically insulating separating layer on each side of the film composite. The film composite provided with the at least one separating layer can then be unwound into a film composite roll in order to be available for further processing and / or processing.
  • the separating layer can be formed, for example, on one side on the film composite by treating the corresponding main side of the film composite, for example by a diffusion process or the like, such that a section of the film composite adjoining the main side has a reduced electrical conductivity compared to the rest of the film composite which is used for electrical insulation between interconnected film composites.
  • the continuous application or formation of at least one electrically insulating separating layer at least on one side of the sheet on or on the film composite can be carried out much faster than, for example, the deposition of separating layers accordingly DE 10 2009 048 658 A1 .
  • the application of the electrically insulating separating layer to the film composite can be carried out by continuous cohesive bonding, for example using a sprayed-on adhesive or other adhesive, of the film composite with a film forming the separating layer.
  • the formation of the electrically insulating separating layer on the film composite can be carried out, for example, by continuous application, for example by means of a coating roll or by spraying, an insulating material on the film composite which hardens after its application as quickly as possible to form the release layer.
  • the formation of the release layer on the film composite can be effected by the above-described treatment of a main side of the film composite.
  • At least one electrically insulating separating layer can be applied to each of the films at least on one side in a continuous, continuous manner or formed on each of the films. Also, the continuous application or formation of at least one electrically insulating separating layer at least on one side flat on or on the respective amorphous film is much faster feasible than, for example, the deposition of release layers accordingly DE 10 2009 048 658 A1 .
  • the application of the electrically insulating separating layer to the respective amorphous film can be carried out by a continuous material-bonding connection, for example using a sprayed-on adhesive or another adhesive, of the amorphous film with a film forming the separating layer.
  • the formation of the electrically insulating separating layer on the respective amorphous film can be effected, for example, by continuous application, for example by means of an application roller or by spraying, an insulating material onto the amorphous film, which hardens after its application as quickly as possible to form the separating layer.
  • the formation of the release layer on the respective amorphous film may be performed by the above-described treatment of a major side of the amorphous film. It is also possible to arrange or form an electrically insulating separating layer on each side of the respective amorphous film.
  • the respective amorphous film provided with the at least one separating layer can subsequently be unwound into a film roll in order to be available for further processing and / or processing.
  • the continuous cohesive bonding of the film composites to one another can take place by means of an adhesive or another adhesive which is applied continuously to at least one of the film composites by means of an application roller or by spraying.
  • the adhesive or the adhesive may be electrically insulating.
  • the width of the multi-component composite may be, for example, in a range of about 200 mm to about 1000 mm.
  • the thickness of the multi-component composite may, for example, be in a range from about 40 ⁇ m to about 2000 ⁇ m.
  • the thickness of a composite may range from about 3 mm to about 400 mm.
  • the width of a composite body may be, for example, in a range of about 30 mm to 1000 mm.
  • the length of a composite may, for example, be in a range of about 100 mm to 2500 mm.
  • the composite sections For example, they can be selected, stacked and materially connected to one another such that the respective composite body formed therefrom has, for example, a rectangular, trapezoidal or otherwise formed cut surface. Also, at least one groove or the like may be formed on at least one side surface of the respective formed composite body.
  • the composite sections may be of different thickness, long and / or wide to create a step-like taper of the respective composite body formed therefrom.
  • a width and / or length of the composite body is equal over a height of the stack or at least partially decreases toward the free end of the end portion in at least one end region of the stack given the height.
  • the respective coil leg or the respective yoke can be produced by materially joining composite bodies of the same or different width and / or length, wherein a cross-sectional area of the coil leg or yoke by the use of composite bodies of different width or length on at least one corner region with a gradation is trained.
  • the coil leg for example, can be given a cross-sectionally approximately circular, elliptical or oval cross-sectional area, for which purpose each corner area is formed with a corresponding gradation.
  • the yoke may for example have a rectangular cross-sectional area.
  • the composites may be bonded together by an adhesive or other adhesive.
  • the adhesive or the adhesive may be electrically insulating.
  • the composite layers are each formed from a longitudinally split film composite, wherein the one film composite with respect to a cross-sectional width of the respective multi-component composite is at a different location than the adjacent adjacent to the film composite further film composite.
  • the multi-component composite can be achieved by an alternating arrangement of these two composite films be formed, wherein the multi-component composite can also be formed from more than two film composites.
  • the individual film composites can also have a different number of longitudinal divisions.
  • it is essential that longitudinal pitches of adjacently arranged film composites are arranged offset relative to one another with respect to the longitudinal extension of the multi-component composite or are not arranged in alignment with one another in the thickness direction of the multi-component composite.
  • the film composites of the composite layers are not formed correspondingly longitudinally divided.
  • Fig. 1 shows a schematic and perspective view of an embodiment of a transformer 1 according to the invention in the form of a three-phase transformer.
  • the transformer 1 has a soft-magnetic transformer stack core 2 with layers, not shown, having an amorphous and / or nanocrystalline microstructure of an iron alloy, in particular a FeSiB alloy.
  • the transformer stack core 2 has three mutually parallel coil legs 3 and two yokes 4 connected to opposite ends of the coil legs 3. At each coil leg 3, two coils 18 and 19 are arranged.
  • the coil legs 3 and the yokes 4 are each formed by a stack of materially interconnected, not shown composite bodies, each composite body of materially interconnected, cut, not shown composite portions of a band-shaped, not shown Mehrkomponentenverbunds is formed.
  • the respective multi-component composite has at least two composite layers (not shown), each composite layer being formed from a film composite (not shown), each film composite having at least two tape-shaped, soft-magnetic films (not shown) with an amorphous and / or nanocrystalline structure of an iron alloy, in particular a FeSiB alloy, wherein the films are bonded to one another in a material-locking manner.
  • the composite layers of the multi-component composite can each be formed from a longitudinally-divided film composite, not shown, wherein the one film composite is longitudinally spaced at a different location with respect to a cross-sectional width of the respective multi-component composite, than the further film composite arranged adjacent to the film composite.
  • the transformer 1 also has a holding device 5 for holding the transformer stack core 2.
  • the holding device 5 has two holding units 6 and 7, which are each arranged on one of the two yokes 4, that the holding units 6 and 7 are arranged at opposite end portions of the transformer stack core 2.
  • the holding device 5 has four mechanical fixing means 8 acting on the two holding units 6 and 7, via which the two holding units 6 and 7 are detachably connected to one another in a non-destructive manner.
  • Each fixing means 8 is designed as a screw connection.
  • the fixing means 8 are each arranged in a corner region of the holding device 5.
  • the holding device 5 has four clamped between the holding units 6 and 7 spacers 9, which are sleeve-shaped in the embodiment, wherein a threaded shaft 39 of the respective fixing means 8 is passed through the respective spacers 9.
  • the threaded shanks 39 of the fixing means 8 may be extended beyond the holding unit 6 in such an upward direction that they are used in addition to holding a lid, not shown, of a transformer tank, not shown.
  • the holding device 5 has a plurality of spring elements (not shown) arranged between the respective holding unit 6 or 7 and the transformer stack core 2.
  • the holding device 5 is designed such that the spring elements are elastically deformed when arranged at the holding device 5 transformer stack core 2 by a given thereby at least indirect contact with the transformer stack core 2.
  • At least one spring element may be U-shaped in such a way that it embraces the transformer stack core 2 in a form-fitting manner along at least a portion of the respective yoke 4 in such a way that a connecting region (not shown) is provided between at least one coil leg 3 and the respective one Yoke 4 is located between not shown parallel legs of the spring element. A restoring force which can be applied with the respective spring element can be adjusted separately.
  • Each holding unit 6 or 7 has two holding elements 10 and 11, which are arranged on opposite yoke end regions of the respective yoke 4. Furthermore, each holding unit 6 or 7 has two mechanical fixing means 12 acting on the two holding elements 10 and 11, via which the two holding elements 11 and 12 are detachably connected to one another in a non-destructive manner. In addition, each holding unit 6 or 7 has two spacers 13 clamped between the holding elements 10 and 11, which are sleeve-shaped in the exemplary embodiment, wherein a threaded shank 40 of the respective fixing means 12 is passed through the respective spacer 13. Each holding unit 6 or 7 furthermore has a plurality of spring elements (not shown) arranged between the respective holding element 11 or 12 and the respective yoke 4.
  • the respective holding unit 6 or 7 is designed such that the respective spring element is elastically deformed when arranged at the holding device 5 transformer stack core 2 by a given thereby at least indirect contact with the transformer stack core 2.
  • a restoring force which can be applied with the respective spring element can be adjusted separately.
  • the holding device 5 may also comprise at least one, not shown, at least partially between the respective spacer 9 and the transformer stack core 2, not shown spring element, wherein the holding device 5 may be formed such that the spring element at at the holding device 5 arranged transformer stack core 2 by a while given at least indirect contact with the transformer stack core 2 is elastically deformed.
  • the holding device 5 may have at least one spacer (not shown) arranged between two mutually adjacent coil legs 3, on which the two coil legs 3 are laterally supported against one another.
  • spacers are for example in Fig. 6 shown.
  • the holding device 5 also has three pairs of two each on two opposite sides of the respective coil leg 3 arranged supporting elements 14, which are each connected at the end to the two holding units 6 and 7.
  • the holding device 5 per coil leg 3 has four coil support elements 15 for axially supporting the coils 18 and 19 arranged on the respective coil leg 3.
  • Per coil leg 3 two coil support elements 15 are arranged on one holding unit 6 and the other two coil support elements 15 on the other holding unit 7.
  • Per coil leg 3, the coil support members 15 are arranged in pairs on opposite sides of the respective coil leg 3. As indicated on the holding unit 7 by dot-dash lines, coil support elements 15 extending between adjacently arranged coil legs 3 can be monolithically connected to one another.
  • the holding device 5 per coil support member 15 has two arranged between the respective holding unit 6 and 7 and the respective coil support member 15, spring elements, not shown, which engage respectively in an opening 16 on the respective holding unit 6 and 7 respectively.
  • the holding device 5 is designed such that when the transformer stacking core 2 is arranged on the holding device 5, the spring elements are elastically deformed with coils 18 and 19 indicated by dot-dash lines by means of an indirect contact provided via the coil supporting elements 15 with at least one coil 18 or 19 are.
  • Fig. 2 shows a schematic and perspective view of the in Fig. 1 In particular, all four spacers 9 are shown.
  • Fig. 3 shows a schematic and perspective partial sectional view of a portion of the in Fig. 1 1.
  • the coils are omitted, whereby the support elements 14 and their respective arrangement on the respective coil leg 3 can be seen better.
  • Fig. 4 shows a schematic and perspective sectional view of another portion of the in Fig. 1 shown transformer 1 in the region of the holding member 11 of the holding unit 6 in a first variant.
  • An opening 16 formed on the holding element 11 is shown, into which a pin 20 of the spring element 21 shown engages.
  • a support plate 22 which is formed by monolithically connecting between adjacent arranged coil legs 3, not shown coil support elements, as shown in FIG FIGS. 1 and 3 is indicated, a separate recess 23 is formed for each spring element 21, in which the respective spring element 21 partially recorded.
  • a recess 25 is formed, in which engages a further pin 26 of the respective spring element 21.
  • Each spring element 21 is monolithically made of an elastomer.
  • Fig. 5 shows a schematic and perspective sectional view of another portion of the in Fig. 1 shown transformer 1 in the region of the holding member 11 of the holding unit 6 in a second variant.
  • An opening 16 formed on the holding element 11 is shown, into which a pin 17 of the plate-shaped spring element 27 shown engages.
  • the spring element 27 is supported on one side on a support plate 28, which is formed by monolithic connection between adjacently arranged coil legs 3 arranged coil support elements, not shown, as shown in FIG FIGS. 1 and 3 is indicated.
  • Each spring element 27 is monolithically made of an elastomer.
  • Fig. 6 shows a schematic sectional view of another embodiment of a transformer 29 according to the invention in the form of a three-phase transformer.
  • the transformer 29 differs essentially from that in the FIGS. 1 to 5 shown embodiment, that the transformer stack core 2 is supported over large surface formed spring elements 30 and 31 on the holding unit 6 and 7 and via two further spring elements 32 to the spacers 33, which are arranged separately from the fixing means 8.
  • the transformer 29 according to the FIGS. 1 to 5 be formed, which is why to avoid repetition incidentally to the above description of the FIGS. 1 to 5 is referenced.
  • the holding device 5 also has four pairs of spacers 34 arranged in pairs between two mutually adjacent coil legs 3, on which the respective two coil legs 3 are laterally supported against one another.
  • Fig. 7 shows a further schematic sectional view of the in Fig. 7 shown transformer 29 according to the sectional plane AA Fig. 6 , It can be seen that the spring elements 30 and 31 are each formed in cross-section U-shaped. In each case, a connection region 35 between the respective yoke 4 and the respective coil leg 3 is arranged between parallel legs 36 of the respective spring element 36.
  • the respective U-shaped spring element 30 or 31 can three separately produced elements, not shown, may be arranged in a U-shape, wherein a leg forming element as a spring element and the other leg forming element may be formed as a sliding body, while the two elements connecting these elements may be formed as a spring element.
  • Fig. 8 shows a schematic sectional view of another embodiment of a transformer 37 according to the invention in the form of a three-phase transformer.
  • the transformer 35 differs in particular by the in the FIGS. 6 and 7 shown embodiment, that each holding unit 6 and 7 in cross-section U-shaped and thus has two parallel legs 38, between which the respective spring element 30 and 31 is received.
  • the mechanical fixing means of the holding unit 5 are not shown.
  • a spring element 41 is arranged, which is elastically deformed by the contact with the respective coil 18 and 19 respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Housings And Mounting Of Transformers (AREA)
EP17209160.5A 2017-12-20 2017-12-20 Dispositif de retenue un noyau compact magnétique doux de transformateur et transformateur Active EP3503134B1 (fr)

Priority Applications (14)

Application Number Priority Date Filing Date Title
EP17209160.5A EP3503134B1 (fr) 2017-12-20 2017-12-20 Dispositif de retenue un noyau compact magnétique doux de transformateur et transformateur
HUE17209160A HUE049879T2 (hu) 2017-12-20 2017-12-20 Tartóeszköz lágymágneses kötegelt transzformátormag és transzformátor tartásához
ES17209160T ES2785661T3 (es) 2017-12-20 2017-12-20 Dispositivo de sujeción para sostener un núcleo de apilamiento magnético blando de un transformador y transformador
SI201730232T SI3503134T1 (sl) 2017-12-20 2017-12-20 Držalna naprava za držanje mehkomagnetnega lameliranega jedra transformatorja in pa transformator
PT172091605T PT3503134T (pt) 2017-12-20 2017-12-20 Dispositivo de suporte para suporte do núcleo empilhado de um transformador magneticamente macio e transformador
PL17209160T PL3503134T3 (pl) 2017-12-20 2017-12-20 Urządzenia mocujące do przytrzymywania magnetycznie miękkiego rdzenia warstwowego transformatora oraz transformator
RS20200478A RS60246B1 (sr) 2017-12-20 2017-12-20 Uređaj za držanje namenjen za držanje mekog magnetnog transformatorskog slaganog jezgra, kao i transformator
SG11202005608YA SG11202005608YA (en) 2017-12-20 2018-12-20 Holding device for holding a soft-magnetic stacked core of a transformer and transformer
PCT/EP2018/086077 WO2019122067A1 (fr) 2017-12-20 2018-12-20 Dispositif de maintien pour maintenir un noyau empilé à magnétisme doux d'un transformateur ainsi que transformateur
PE2020000774A PE20210831A1 (es) 2017-12-20 2018-12-20 Dispositivo de sujecion para sostener un nucleo de apilamiento magnetico blando de un transformador y transformador
BR112020012467-2A BR112020012467A2 (pt) 2017-12-20 2018-12-20 dispositivo de suporte para suporte do núcleo empilhado de um transformador magneticamente macio e transformador
HRP20200654TT HRP20200654T1 (hr) 2017-12-20 2020-04-23 Naprava za držanje koja služi za držanje meke magnetske složene jezgre transformatora kao i transformatora
SA520412246A SA520412246B1 (ar) 2017-12-20 2020-06-17 وسيلة احتجاز لاحتجاز قلب محول مرصوص ممغنط مطاوع، ومحول
CL2020001634A CL2020001634A1 (es) 2017-12-20 2020-06-17 Dispositivo de sujeción para sostener un núcleo de apilamiento magnético blando de un transformador y transformador.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17209160.5A EP3503134B1 (fr) 2017-12-20 2017-12-20 Dispositif de retenue un noyau compact magnétique doux de transformateur et transformateur

Publications (2)

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EP3503134A1 true EP3503134A1 (fr) 2019-06-26
EP3503134B1 EP3503134B1 (fr) 2020-01-29

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EP (1) EP3503134B1 (fr)
BR (1) BR112020012467A2 (fr)
CL (1) CL2020001634A1 (fr)
ES (1) ES2785661T3 (fr)
HR (1) HRP20200654T1 (fr)
HU (1) HUE049879T2 (fr)
PE (1) PE20210831A1 (fr)
PL (1) PL3503134T3 (fr)
PT (1) PT3503134T (fr)
RS (1) RS60246B1 (fr)
SA (1) SA520412246B1 (fr)
SG (1) SG11202005608YA (fr)
SI (1) SI3503134T1 (fr)
WO (1) WO2019122067A1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN111613417A (zh) * 2020-05-06 2020-09-01 衢州学院 一种变压器铁心压紧装置
EP4044205A1 (fr) * 2021-02-16 2022-08-17 Hitachi Energy Switzerland AG Ensemble transformateur
CN115424820A (zh) * 2022-09-26 2022-12-02 江西亚珀电气有限公司 一种分割式树脂绝缘干式变压器

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WO2000002211A1 (fr) * 1998-07-02 2000-01-13 Siemens Aktiengesellschaft Composant a induction presentant un noyau
CN201594447U (zh) * 2009-11-19 2010-09-29 华通机电集团有限公司 非晶合金变压器
DE102009048658A1 (de) 2009-09-29 2011-03-31 Siemens Aktiengesellschaft Transformatorkern oder Transformatorblech mit einer amorphen und/oder nanokristallinen Gefügestruktur und Verfahren zu dessen Herstellung
CN202443832U (zh) * 2012-02-29 2012-09-19 张家港新特变科技有限公司 锡槽干式变压器
DE102011083521A1 (de) 2011-09-27 2013-03-28 Siemens Aktiengesellschaft Pressrahmenstruktur für Transformator
CN203312000U (zh) * 2013-06-20 2013-11-27 浙江申工变压器制造有限公司 干式变压器
CN102543384B (zh) * 2010-12-20 2016-02-03 沈阳福林特种变压器有限公司 矿用隔爆型移动变电站用非晶合金铁芯全绝缘干式变压器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000002211A1 (fr) * 1998-07-02 2000-01-13 Siemens Aktiengesellschaft Composant a induction presentant un noyau
DE102009048658A1 (de) 2009-09-29 2011-03-31 Siemens Aktiengesellschaft Transformatorkern oder Transformatorblech mit einer amorphen und/oder nanokristallinen Gefügestruktur und Verfahren zu dessen Herstellung
CN201594447U (zh) * 2009-11-19 2010-09-29 华通机电集团有限公司 非晶合金变压器
CN102543384B (zh) * 2010-12-20 2016-02-03 沈阳福林特种变压器有限公司 矿用隔爆型移动变电站用非晶合金铁芯全绝缘干式变压器
DE102011083521A1 (de) 2011-09-27 2013-03-28 Siemens Aktiengesellschaft Pressrahmenstruktur für Transformator
CN202443832U (zh) * 2012-02-29 2012-09-19 张家港新特变科技有限公司 锡槽干式变压器
CN203312000U (zh) * 2013-06-20 2013-11-27 浙江申工变压器制造有限公司 干式变压器

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111613417A (zh) * 2020-05-06 2020-09-01 衢州学院 一种变压器铁心压紧装置
CN111613417B (zh) * 2020-05-06 2021-05-14 衢州学院 一种变压器铁心压紧装置
EP4044205A1 (fr) * 2021-02-16 2022-08-17 Hitachi Energy Switzerland AG Ensemble transformateur
CN115424820A (zh) * 2022-09-26 2022-12-02 江西亚珀电气有限公司 一种分割式树脂绝缘干式变压器
CN115424820B (zh) * 2022-09-26 2024-05-31 江西亚珀电气有限公司 一种分割式树脂绝缘干式变压器

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HRP20200654T1 (hr) 2020-07-10
SG11202005608YA (en) 2020-07-29
CL2020001634A1 (es) 2020-12-04
EP3503134B1 (fr) 2020-01-29
WO2019122067A1 (fr) 2019-06-27
SA520412246B1 (ar) 2022-11-05
SI3503134T1 (sl) 2020-08-31
RS60246B1 (sr) 2020-06-30
ES2785661T3 (es) 2020-10-07
PL3503134T3 (pl) 2020-09-21
BR112020012467A2 (pt) 2020-11-24
PE20210831A1 (es) 2021-05-05
PT3503134T (pt) 2020-05-06
HUE049879T2 (hu) 2020-10-28

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