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WO2018033336A1 - Transformateur à plusieurs étages pour réseau de distribution ou pour le fonction avec un convertisseur - Google Patents

Transformateur à plusieurs étages pour réseau de distribution ou pour le fonction avec un convertisseur Download PDF

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Publication number
WO2018033336A1
WO2018033336A1 PCT/EP2017/068210 EP2017068210W WO2018033336A1 WO 2018033336 A1 WO2018033336 A1 WO 2018033336A1 EP 2017068210 W EP2017068210 W EP 2017068210W WO 2018033336 A1 WO2018033336 A1 WO 2018033336A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
voltage
transformer
windings
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.)
Ceased
Application number
PCT/EP2017/068210
Other languages
German (de)
English (en)
Inventor
Rudolf Hanov
Dieter BOGNER
Evica DIVKOVIC
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2018033336A1 publication Critical patent/WO2018033336A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—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
    • 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
    • H01F27/303—Clamping coils, windings or parts thereof together

Definitions

  • Multi-level transformer for a distribution network or operation with one inverter
  • the invention relates to a transformer for a distribution network or for the power supply of a power converter having a core having several core sections, a core section enclosing undervoltage winding having a plurality of stacked and embedded each in a cured insulating lower voltage sub-windings, a high-voltage winding having a plurality of superposed and each having embedded in a cured insulating Oberschreibsteilwicklept and lower press plates for pressing the core sections, wherein a lowermost Oberpressivessteilwicklung is supported on the lower press plates.
  • Such a transformer which is also referred to as Mehrstocktransforma- tor is known in the art to those skilled in the art.
  • Previously known multi-level transformers are designed as so-called dry transformers.
  • the windings of the transformer are therefore not in a liquid Iso ⁇ liermedium, such as a mineral oil, arranged, but wound in a cast resin transformer usually with curable insulating or cast in a casting resin.
  • Each partial winding thus provides an indi vidual ⁇ block defining a circular cylindrical inner contour generally.
  • the bottom and Oberschreibsteilwick- lungs are concentric to each other and arranged to form a sub-sub-winding ⁇ voltage by projecting core leg.
  • the press plates advantageously have two in each case. Sheets on, in the interstice of the core sections protrude. Thus, the press plates are firmly connected to the core.
  • the object of the invention is to provide a transformer of the type mentioned, in which the production costs are further reduced. The invention solves this problem in that all Oberspan ⁇ tion partial windings lie directly against each other and are connected to each other without compression.
  • the Ober Kunststoffssteilwicklun- conditions are no longer held by pressing together.
  • the transformer according to the invention is free of clamping means. Rather, the upper voltage sub-windings are directly adjacent to each other, wherein the lowest upper-voltage sub-winding is supported on the lower press plate and connected thereto. The remaining upper-voltage sub-windings are simply stacked on the lowest upper-voltage sub-winding, so that a second upper-voltage sub-winding rests directly on the lowermost subvoltage winding. Possibly. a third undervoltage sub-winding is applied to the second undervoltage sub-winding, and so on.
  • the upper-voltage partial windings are hollow-cylindrical and define with their inner wall a circular-cylindrical cavity. It is advantageous that all upper part voltage windings have the same inner diameter. The same applies to the outer contour, but the outer contour can deviate from a nikzylindri- see design.
  • all upper part voltage windings are identical.
  • the one upper upper Voltage sub-winding aligned to a lower subvoltage subwinding, so that it terminates flush with the bottom most subvoltage winding part.
  • the connecting means, by which the upper voltage part windings are connected to each other are arbitrary.
  • the Oberwoodssteil ⁇ windings by brackets, screws or the like with each other be connected. It is essential in the context of the invention only that such a high connection force is provided that the upper voltage sub-windings over the specified life of the transformer away are kept safe.
  • the upper part voltage windings are connected to each other via an adhesive bond or a Velcro connection.
  • An adhesive or Velcro connection is inexpensive and also provides the required mechanical strength for a sufficient connection force of the upper voltage sub-windings for undervoltage sub-winding ready.
  • the lowermost upper-voltage partial winding is screwed to the lower press plates.
  • the screwing increases the mechanical Festig ⁇ speed, the screwing can inexpensively and quickly suc ⁇ conditions.
  • a thread is embedded in the cured insulating material of the lowest upper-voltage partial winding.
  • an insulating material is, for example cast resin, in particular epoxy resin into consideration.
  • the embedding of the windings takes place by known casting with the insulating material in liquid form.
  • the lower press plates generally have two profiled supports, which lie opposite each other and define a gap into which the core sections protrude individually or together. By screwing the lower press plates are clamped against each other, wherein the said core sections together. menpressen.
  • upper pressing plates within the scope of the invention are provided adjacent the lower pressing plates, which also define a gap into which the Kernab ⁇ sections extend with its end facing away from the lower end of core sheet inside. The pressing of the core sections is carried out as described above, so that also at the upper end of the core sections a sufficiently large mechanical support is provided.
  • the Oberwoods- part windings are no longer connected to the upper press plate in any way, but all high-voltage windings are supported solely by their weight forces the lower press plates.
  • the supporting feet which are integrally formed on the insulating material, are provided with an internal thread, so that the supporting feet can be firmly screwed to the lower pressing plates.
  • a stable ⁇ le connection between the high-voltage part windings and the lower pressing plates is provided.
  • each low-voltage winding is held on the core portion which it encloses.
  • the lower-voltage sub-windings are not deposited on the lower press plates. Rather, the undervoltage sub-windings are fixed to the
  • each upper voltage sub-winding is concentrated ⁇ risch arranged to each lower voltage sub-winding.
  • the concentric arrangement produces the best results in the operation of the transformer according to the invention.
  • FIG 1 shows an embodiment of the invention
  • FIG. 2 shows the transformer according to FIG. 1 in a perspective view from behind
  • Figure 3 shows the transformer shown in Figures 1 or 2 in a sectional side view
  • Figure 4 illustrate the transformer according to Figures 1 and 2 in a sectional plan view.
  • FIG. 1 shows an embodiment of the transformer 1 according to the invention in a perspective front view.
  • the transformer 1 is designed as a double-decker transformer.
  • two lower press plates 3 and 4 are screwed.
  • a lower upper-voltage sub-winding 5 is supported, wherein a further upper-voltage sub-winding 6 is in direct contact with the lower upper-voltage sub-winding 5.
  • the upper voltage sub-winding 6 is connected by a suitable connection.
  • connecting means 7 firmly connected to the lower part of the winding.
  • the lower upper voltage sub-winding 5 forms Abstützfgnae 8, which have an internal thread.
  • the Abstellfozoe 8 are firmly bolted to the lower press plates 3 and 4.
  • the upper voltage sub-windings 5 and 6 are arranged concentrically with respect to a lower voltage sub-winding, of which only the upper sub-voltage sub-winding 9 can be seen in the upper image area.
  • the undervoltage sub-windings enclose a core leg 10 as a core portion so that each undervoltage sub-winding is concentric with a leg 10 of the core of the transformer 1.
  • upper pressing plates 11 and 12 can be seen, which delimit a gap in which the core legs 10, which consist of core plates, extend into it.
  • FIG. 2 shows the transformer 1 according to FIG. 1 from the rear.
  • the winding terminals 14 of the lower-voltage partial winding are illustrated. Incidentally, the comments on Figure 1 apply here accordingly.
  • FIG. 3 shows a sectional side view of the transformer.
  • the lower upper ⁇ voltage subwinding 5 supporting feet 8 forms, which are firmly bolted to the lower press plates 3 and 4.
  • the leg 10 of the core extends between the lower press plates 3 and 4, so that by clamping the press plates 3 and 4, the sheets of the core portion 10 are pressed firmly against each other and with the yoke.
  • the lower upper-voltage sub-winding 5 stands on the lower pressing plates 3, 4.
  • the upper upper-voltage sub-winding ment 6 is - as already stated - directly and thus immedi ⁇ immedi ately supported on the lower upper voltage sub-winding 5, wherein an adhesive connection 7 between the upper upper voltage sub-winding 6 and the lower upper voltage sub-winding 5 provides the necessary mechanical strength.
  • an adhesive connection 7 between the upper upper voltage sub-winding 6 and the lower upper voltage sub-winding 5 provides the necessary mechanical strength.
  • the adhesive connection 7 used here, within the scope of the invention it is also possible to guarantee any other joint connection or a connection deviating therefrom.
  • a lower undervoltage sub-winding 15 can be seen. This lower undervoltage sub-winding 15 is arranged concentrically to the core leg 10 and concentric to the lower upper-voltage sub-winding 5. In this case, both partial ⁇ windings limit a circular cylindrical interior, through which the core leg 10 extends.
  • the lower undervoltage sub-winding 15 is held firmly on the core section 10 via a clamping connection 17.
  • the jamming of an undervoltage sub-winding on the core section is known to the person skilled in the art, so that it is not necessary to go into detail here.
  • FIG. 4 shows the transformer 1 according to FIGS. 1 or 2 in a plan view, in which the concentric arrangement of the lower upper-voltage partial winding 5 and the lower lower-voltage partial winding 15 can be seen.
  • the lower undervoltage sub-winding 15 is connected via clamping means 17 fixed to the core portion 10.
  • the clamping means 17 comprise, for example, made of an insulating material ⁇ wedges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)

Abstract

L'invention vise à fournir un transformateur (1), destiné à un réseau de distribution ou destiné à fonctionner avec un convertisseur, lequel transformateur comprend un noyau qui comporte une pluralités de parties de noyau (10), un enroulement basse tension qui entoure une partie de noyau (10) et qui comporte un pluralité de sous-enroulements basse tension (9, 15) disposés les uns au-dessus des autres et enrobés chacun dans une matière isolante durcie, et un enroulement haute tension qui comporte un pluralité de sous-enroulements haute tension (6, 7) disposés les uns au-dessus des autres et enrobés chacun dans une matière isolante durcie, et des plaques de pressage inférieures (3, 4) destinées à presser les parties de noyau (10), le sous-enroulement basse tension le plus inférieur étant supporté par les plaques de pressage inférieures (3, 4), dans lequel transformateur les coûts de fabrication sont réduits. A cet effet, tous les sous-enroulements haute tension (4, 5) sont reliés directement entre eux, l'enroulement haute tension n'étant pas fixé par pressage extérieur.
PCT/EP2017/068210 2016-08-19 2017-07-19 Transformateur à plusieurs étages pour réseau de distribution ou pour le fonction avec un convertisseur Ceased WO2018033336A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016215646.2 2016-08-19
DE102016215646.2A DE102016215646A1 (de) 2016-08-19 2016-08-19 Mehrstocktransformator für ein Verteilnetz oder den Betrieb mit einem Umrichter

Publications (1)

Publication Number Publication Date
WO2018033336A1 true WO2018033336A1 (fr) 2018-02-22

Family

ID=59366440

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/068210 Ceased WO2018033336A1 (fr) 2016-08-19 2017-07-19 Transformateur à plusieurs étages pour réseau de distribution ou pour le fonction avec un convertisseur

Country Status (2)

Country Link
DE (1) DE102016215646A1 (fr)
WO (1) WO2018033336A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57148823U (fr) * 1981-03-16 1982-09-18
US20040108926A1 (en) * 2002-12-06 2004-06-10 Square D Company. Transformer winding
DE102005058119A1 (de) * 2005-11-29 2007-05-31 Siemens Ag Fixiervorrichtung für eine elektrische Wicklung
DE102010018059A1 (de) * 2010-04-22 2011-10-27 Siemens Aktiengesellschaft Transformator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2201005A (en) * 1938-05-06 1940-05-14 Westinghouse Electric & Mfg Co Spacer for transformer coils

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57148823U (fr) * 1981-03-16 1982-09-18
US20040108926A1 (en) * 2002-12-06 2004-06-10 Square D Company. Transformer winding
DE102005058119A1 (de) * 2005-11-29 2007-05-31 Siemens Ag Fixiervorrichtung für eine elektrische Wicklung
DE102010018059A1 (de) * 2010-04-22 2011-10-27 Siemens Aktiengesellschaft Transformator

Also Published As

Publication number Publication date
DE102016215646A1 (de) 2018-02-22

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