EP2808879B1 - Agencement d'enroulements d'un transformateur d'isolation haute tension - Google Patents

Agencement d'enroulements d'un transformateur d'isolation haute tension Download PDF

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Publication number
EP2808879B1
EP2808879B1 EP13460035.2A EP13460035A EP2808879B1 EP 2808879 B1 EP2808879 B1 EP 2808879B1 EP 13460035 A EP13460035 A EP 13460035A EP 2808879 B1 EP2808879 B1 EP 2808879B1
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EP
European Patent Office
Prior art keywords
windings
primary
arrangement according
insulation
shell
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.)
Active
Application number
EP13460035.2A
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German (de)
English (en)
Other versions
EP2808879A1 (fr
Inventor
Jacek Gruca
Andrzej Wyzga
Przemyslaw Laskos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Technology AG
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ABB Technology AG
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to EP13460035.2A priority Critical patent/EP2808879B1/fr
Priority to PCT/EP2014/000722 priority patent/WO2014191068A1/fr
Publication of EP2808879A1 publication Critical patent/EP2808879A1/fr
Application granted granted Critical
Publication of EP2808879B1 publication Critical patent/EP2808879B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/16—Toroidal transformers
    • 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
    • H01F27/2895—Windings disposed upon ring 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/04—Fixed transformers not covered by group H01F19/00 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies

Definitions

  • the subject of the invention is an arrangement of windings of a HV insulation transformer for power supply devices with multiple outputs whose outputs must be insulated from the primary side and between each other, to withstand very high voltages.
  • High voltage insulation transformers to provide high voltage galvanic insulation. This allows to isolate each output from the input of the power supply device as well as each output from the other output of the supply device.
  • the controllers sense primary currents to protect the circuit against overload or shorted output.
  • the sensing circuits can be applied to monitor primary currents, which are dependent on secondary currents.
  • the isolating transformer comprises a single primary and multiple secondary windings
  • the sensing circuit measures total primary current without the possibility of monitoring individual secondary currents.
  • the power supply devices with HV insulated transformers having multiple outputs there are separate transformers for each of the outputs, providing galvanic isolation between primaries and secondaries as well as between all of the secondaries.
  • the essence of the invention comprising a secondary winding superimposed on a primary winding forming a pair of windings wound on a transformer core is that at least two pairs of windings are placed on the same one common core in such a way that any windings of each pair of windings are not overlapping the neighboring pair of windings.
  • the primary windings are connected in parallel and each of the primary winding has a current sensor adapted for measuring the current of its respective secondary winding.
  • each pair of windings has an insulation gap situated between the external surface of the primary windings and the internal surface of the secondary windings.
  • an insulation shell is inserted having a shape compatible with the shape of the core.
  • a series of press-fits are placed for positioning the secondary windings exactly in superposition area on the primary windings.
  • the insulation shell is provided with ribs which are distributed radially along the internal side of shell walls on both sides of the shell for proper positioning the core and primary windings.
  • the insulation shell is made in the form of a insulation mesh.
  • the four pairs of windings are place uniformly.
  • the primary windings and the secondary windings are coated with one or more insulation layers.
  • the transformer core is made as a solid ferromagnetic body in the shape of a toroid.
  • the transformer core is made as one body with the insertion of the other magnetic material having different magnetic permittivity in its magnetic path.
  • the transformer core is made as a stack of separate ring plates situated one on a top of the other.
  • the advantage of the inventive transformer is that it assures the assessment of the individual secondary current of each outputs of the power supply device by sensing the primary current.
  • the use of single common core transformer as opposed to the multiple transformers allows the size reduction of the power supply device.
  • transformer windings in an axonometric view fig. 3 - the second embodiment of the transformer windings in an axonometric view, fig.4 - transformer windings from fig. 3 after detaching a half of the transformer shell.
  • the transformer for the power supply device has a magnetic core ring 1, on which at least two separated primary windings 2 are wound.
  • the primary windings are connected in parallel.
  • Each primary winding 2 is equipped with a current sensor 3.
  • a separate secondary winding 4 is wound in such a way that winding 4 is spatially superimposed on the primary winding 2, where a certain distance is present between the external surface of the winding 2 and the internal surface of the winding 4 forming an insulation gap 5 between them.
  • the gap 5 can be filled with a potting insulation material assuring the proper insulation level between both windings 2 and 4, which is not shown in the drawing.
  • the primary windings 2 and the secondary windings 4 are forming pairs of windings 6 having one primary and one secondary winding in each pair. All pairs of the windings 6 are distributed uniformly along the perimeter of the core 1 in such a way that the neighboring pairs are not overlapping each other.
  • an insulation shell 7 made of plastic is inserted in the gap 5.
  • the shell 7 is composed of two halves 7a and 7b and has a shape similar to core 1, thus covers the core 1 except of primary windings terminals leaded out of the shell 7, which is not shown in the drawing.
  • the outer side of the side wall of the shell 7 is provided with a series of press-fits 8 placed on its perimeter in order to position the secondary windings 4 on top of the primary winding 2.
  • the shell 7 is provided with ribs 9 which are distributed radially along both inner sides of the side walls.
  • the insulation shell 7 can be realized as mesh construction which is not shown in the drawing. In such a case the press-fits 8 are needless.
  • the primary windings 2 and the secondary windings 4 can be coated with one or more insulation layers.
  • the gap 5 can be eliminated, which means that the primary and the secondary windings of the pair 6 remain in contact.
  • the transformer according to the both embodiments of the invention could be placed in an insulating housing and covered with an insulating cover which is not presented in the drawing.
  • the housing can be made out of a resin by molding and in such a case, the shell can be omitted, because the resin insulation between the windings replaces the shell.
  • the magnetic core 1 is made as a solid ferromagnetic body in the shape of toroid, but it can be made as one body with the insertions of the other magnetic material having different magnetic permittivity. Also the core 1 could be made of some separate ring plates situated one on the top of the other forming a stack. The number of the pairs of windings in the exemplary embodiment is four, but it may be different on the assumption that the pairs 6 do not overlap each other.
  • the principle of operation of the inventive transformer is the following. All the primary windings 2 equipped with current sensors 3 are connected in parallel and driven from an AC source inducing voltages in the secondary windings 4. The sensors 3 measure primary currents which are dependent on the secondary ones, so indirectly the sensors sense secondary currents. Even though all pairs of the windings 6 are placed on the same common core 1, the individual currents flowing through the primary windings 2 are dependent on the currents of their respective secondary windings 4 with negligible impact of the currents of neighboring pairs 6. Each pair of the windings 6 acts like an independent transformer, since the magnetic coupling within each pair of the windings is much higher than between the neighboring pairs, hence the crosstalk between the neighboring windings is negligible.
  • the pair of winding 6 is formed such that the secondary windings 4 are placed on top of the primary windings 3 but it is understand to those skilled in the art that the reverse relation between windings is possible.
  • the secondary windings is placed under the primary windings, the scope of the protection will be the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Claims (11)

  1. Agencement d'enroulement d'un transformateur d'isolation haute tension utilisé pour l'alimentation électrique comprenant les enroulements secondaires (4) embobinés sur les enroulements primaires (2) et constituant un couple (6) enroulé sur le noyau du transformateur (1), où deux couples au moins de ces enroulements (6) sont placés sur le même noyau du transformateur (1) de manière à ce qu'aucun des enroulements (2, 4) constituant un couple (6) ne chevauche les enroulements (2, 4) du couple adjacent d'enroulements (6) et où les enroulements primaires (2) sont raccordés en parallèle, caractérisé en ce que chaque enroulement primaire (2) possède un détecteur de courant (3) servant à mesurer le courant dans l'enroulement (4) qui constitue le couple avec l'enroulement primaire (2).
  2. L'agencement d'enroulement selon la revendication 1, caractérisé en ce que chaque couple d'enroulements (6) possède une coupure d'isolation (5) située entre la surface extérieure des enroulements primaires (2) et la surface intérieure des enroulements secondaires (4).
  3. L'agencement d'enroulement selon la revendication 2, caractérisé en ce que dans la coupure d'isolation (5), entre la surface extérieure des enroulements primaires (2) et la surface intérieure des enroulements secondaires (4), est insérée une carapace isolant (7) dont la forme est adaptée à la forme du noyau du transformateur (1).
  4. L'agencement d'enroulement selon la revendication 3, caractérisé en ce que sur la surface extérieure de la carapace isolant (7) se trouve une série de rainures (8) destinée à positionner les enroulements secondaires exactement au centre au dessus de leur enroulements correspondants primaires (2).
  5. L'agencement d'enroulement selon la revendication 3, caractérisé en ce que la carapace isolant (7) possède des nervures (9) qui sont réparties de façon radiale le long des parois intérieures de la carapace de ses deux côtés qui servent à positionner correctement le noyau (1) des enroulements primaires (2).
  6. L'agencement d'enroulement selon la revendication 3, caractérisé en ce que la carapace isolant (7) est faite en grille isolante.
  7. L'agencement d'enroulement selon la revendication 1, caractérisé en ce que les quatre couples d'enroulement (6) sont répartis uniformément le long de la circonférence du transformateur (1).
  8. L'agencement d'enroulement selon une quelconque des revendications précédentes, caractérisé en ce que les enroulements primaires (2) et les enroulements secondaires (4) sont revêtus d'une ou plus de couches isolantes.
  9. L'agencement d'enroulement selon une quelconque des revendications précédentes, caractérisé en ce que le noyau du transformateur (1) est fait en matériau ferromagnétique d'une forme de tor.
  10. L'agencement d'enroulement selon la revendication 9, caractérisé en ce que le noyau du transformateur (1) est exécuté comme une seule pièce dont la composition comprend un autre matériau magnétique ayant une autre permittivité, constituant une partie de???
  11. L'agencement d'enroulement selon les revendications 1 à 8, caractérisé en ce que le noyau du transformateur (1) est fait comme une pile d'anneaux magnétiques empilés les uns sur les autres.
EP13460035.2A 2013-05-29 2013-05-29 Agencement d'enroulements d'un transformateur d'isolation haute tension Active EP2808879B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13460035.2A EP2808879B1 (fr) 2013-05-29 2013-05-29 Agencement d'enroulements d'un transformateur d'isolation haute tension
PCT/EP2014/000722 WO2014191068A1 (fr) 2013-05-29 2014-03-18 Agencement d'enroulements de transformateur à isolation haute tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13460035.2A EP2808879B1 (fr) 2013-05-29 2013-05-29 Agencement d'enroulements d'un transformateur d'isolation haute tension

Publications (2)

Publication Number Publication Date
EP2808879A1 EP2808879A1 (fr) 2014-12-03
EP2808879B1 true EP2808879B1 (fr) 2015-10-14

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EP (1) EP2808879B1 (fr)
WO (1) WO2014191068A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018208991A1 (fr) * 2017-05-10 2018-11-15 North Carolina State University Chargeurs rapides modulaires à moyenne tension

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016107818B4 (de) 2016-04-27 2018-01-25 Sma Solar Technology Ag Drosselanordnung mit einem Einsatz
FR3058255B1 (fr) * 2016-11-02 2018-12-14 Supergrid Institute Transformateur electrique haute tension a boitier isolant
CN110784192A (zh) * 2019-11-20 2020-02-11 陕西中控微脉智能科技有限公司 一种脉冲高压发生器
CN112885587A (zh) * 2021-01-11 2021-06-01 上海置信智能电气有限公司 一种应用于电力电子变压器的单相中频变压器
CN115116738B (zh) * 2022-08-12 2023-04-14 杭州裕正电子有限公司 一种变压器生产设备及变压器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2409115B (en) * 2003-12-09 2006-11-01 Nujira Ltd Transformer based voltage supply
US7990244B2 (en) * 2007-11-16 2011-08-02 Hamilton Sundstrand Corporation Inductor winder
WO2009138099A1 (fr) * 2008-05-13 2009-11-19 Abb Technology Ag Connexion de modules d'enroulements de transformateur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018208991A1 (fr) * 2017-05-10 2018-11-15 North Carolina State University Chargeurs rapides modulaires à moyenne tension

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WO2014191068A1 (fr) 2014-12-04
EP2808879A1 (fr) 2014-12-03

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