EP2184749A1 - Agencement de segments d'enroulement - Google Patents

Agencement de segments d'enroulement Download PDF

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Publication number
EP2184749A1
EP2184749A1 EP08019577A EP08019577A EP2184749A1 EP 2184749 A1 EP2184749 A1 EP 2184749A1 EP 08019577 A EP08019577 A EP 08019577A EP 08019577 A EP08019577 A EP 08019577A EP 2184749 A1 EP2184749 A1 EP 2184749A1
Authority
EP
European Patent Office
Prior art keywords
winding
arrangement according
busbar
conductor
segment
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.)
Withdrawn
Application number
EP08019577A
Other languages
German (de)
English (en)
Inventor
Benjamin Weber
Karel Bilek
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
Original Assignee
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.)
Filing date
Publication date
Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to EP08019577A priority Critical patent/EP2184749A1/fr
Priority to PCT/EP2009/007553 priority patent/WO2010051911A1/fr
Publication of EP2184749A1 publication Critical patent/EP2184749A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • H01F27/2847—Sheets; Strips
    • H01F27/2852—Construction of conductive connections, of leads
    • 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
    • H01F27/2847—Sheets; Strips

Definitions

  • the invention relates to an arrangement of first winding segments of a transformer winding about a transformer core extending annularly about a center axis, wherein a respective first winding segment comprises at least two windings of a respective winding conductor arranged around a respective winding axis, wherein the first winding segments penetrate the transformer core along their respective winding axis and wherein the first winding segments are arranged at a respective angle to each other about the central axis
  • transformers are used in electrical energy supply networks. Their task is to electrically couple network areas with different voltage levels together. Higher voltages, for example 10 kV or 110 kV, are suitable for transmission over longer distances because the electrical transmission losses are reduced by the lower current flow. Usually, however, consumers in an electrical network require a lower voltage, which results in a correspondingly higher current flow for the same electrical power.
  • the low-voltage winding of an electrical transformer must be able to carry a correspondingly high current, depending on the rated power and rated voltage of the transformer, for example, some 10A to several 1000A.
  • One way of constructive simplification of such a power transformer is the modular construction of upper and lower voltage winding.
  • a corresponding arrangement of winding modules for power transformers is in the PCT / EP2008 / 003824 described. In this case, a plurality of winding modules, each having a low-voltage winding segment and a respective high-voltage winding segment are arranged around an annular transformer core, wherein the lower-voltage winding segments are electrically connected in parallel and the high-voltage winding segments are electrically connected in series.
  • an electrical connection of the winding modules by means of cable pieces is proposed.
  • the terminals of the lower voltage winding segments can also be connected to one another in a star shape at a common point via corresponding lines, which accordingly has unnecessarily high line lengths.
  • the invention provides for this purpose that at least two concentrically arranged around the central axis busbars (are provided, by means of which the first winding segments are connected to each other electrically in parallel.
  • the bus bars are each arranged in at least one radially to the central axis extending minimum distance to the transformer core and the respective winding conductor of a respective first winding segment is at least partially disposed between the transformer core and the respective busbar.
  • the installation of the corresponding transformer is simplified. First, the winding segments are applied to the transformer core and positioned. Subsequently, the connections between busbars and the respective terminals of the winding segments is produced with high accessibility.
  • a busbar consists predominantly of copper or aluminum. Both materials can be correspondingly easily converted into the desired geometric shape of a corresponding busbar - for example, by bending and have good electrical properties as a conductor.
  • a respective first winding segment is arranged together with at least one galvanically separated further winding segment in a respective common winding module.
  • the first and the at least one further winding segment of a winding module are encapsulated with one another, for example with a suitable one Insulating resin.
  • the mechanical stability of the windings and the insensitivity to mechanical external influences as well as the handling are thereby further increased.
  • a further embodiment of the arrangement according to the invention is characterized in that the respective winding conductor of at least one first winding segment is a strip conductor, which in its respective radially innermost and / or its radially outermost position by means of a fold axially led out of the first winding segment and with the associated busbars electrically connected.
  • strip conductor increases the fill factor of a winding and thus leads to a more compact design.
  • a folding of the strip conductor and its lateral design made possible thereby, a particularly space-saving design of the winding segment and a particularly simple guiding of the winding conductor to the bus bars are made possible.
  • the electrical connection of at least one conductor end to the associated busbar is effected by means of a welded connection.
  • This is particularly advantageous for a permanently reliable electrical connection, if the arrangement is not intended for a later partial disassembly, for example, for the replacement of a single winding segment and the complete assembly is cast in resin, for example.
  • a further embodiment of the arrangement according to the invention is characterized in that the band conductor between its respective connection to the respective busbar and the respective folding is at least partially surrounded by an electrical insulation layer.
  • the minimum distances of the Strip conductor to other components of the arrangement and thus the size of the arrangement are thereby advantageously reduced.
  • an envelope of winding conductors, which are not band conductors, with a suitable insulating material is also covered by the idea of the invention.
  • the cross section of a busbar can be made rectangular, round or trapezoidal according to a preferred embodiment.
  • Such cross sections allow a particularly good contact, in particular with a strip conductor of a respective winding segment - due to the relatively large contact area of the components to be contacted in this case - and are also particularly easy to produce cross-sectional shapes.
  • Rounded edges of a rectangular or trapezoidal cross-section of a busbar serve to reduce the maximum field strength occurring.
  • a bus bar has a cavity extending along its length.
  • a cavity extending along its length.
  • the required cost of materials can be advantageously reduced.
  • this gives the possibility of flowing through the cavity with a suitable coolant.
  • First winding segment elements are preferably provided at least for an electrical voltage of at least 400V. This is the lowest typical rated voltage for electrical components in power distribution networks. Of course, higher rated voltages, such as 10kV, covered by the spirit.
  • the further winding segment elements are electrically connected in series, an electrical voltage of at least 1000V being provided for the series connection.
  • the series connection reduces the voltage load of each individual further winding segment in an advantageous manner.
  • the transmission ratio of a device operated as a transformer according to the invention results in a rated voltage of the series-connected further windings, which is for example between the factor 2 and the factor of 15 higher than the rated voltage of the parallel-connected.
  • Fig. 1 shows a first winding module 10 in a perspective view.
  • a first winding segment 12 of the first winding module is arranged.
  • the winding layers of the strip conductor are insulated from each other, which is also not shown in the figure. Such insulation is conceivable, for example, by a sheathing of the electrical conductor before the winding process or by inserting a separate insulating interlayer during the winding process of the winding segment 12.
  • the first conductor end 16 of the strip conductor is led out at the radially outermost winding layer of the winding segment 12 axially laterally out of this and the second conductor end 18 corresponding to the radially innermost winding layer.
  • first winding segment 12 adjacent another winding segment 14 of the first winding module Radially outside of the first winding segment 12 adjacent another winding segment 14 of the first winding module is arranged, whose individual winding layers also not shown.
  • a wound round conductor is conceivable, which is enveloped by a suitable layer of insulating material.
  • First 12 and further 14 winding segment are arranged together in the winding module 10 and connected to each other, for example with a casting resin, whereby the mechanical stability of the module is increased.
  • Fig. 2 shows a second winding module 30 in a sectional plan view, which is substantially the first in Fig. 1 is similar to the first winding module shown.
  • a first winding segment 32 and another winding segment 36 are arranged.
  • the fold 38 of the strip conductor designed as the coil conductor of the first winding segment 32 in its radially outermost winding layer.
  • the embodiment of the winding conductor takes place axially laterally to the third conductor end 34.
  • the embodiment of the winding conductor at its other end in the radially innermost winding layer is not shown in the figure.
  • Fig. 3 shows a section through a first inventive arrangement 40 of winding modules about a central axis 100, wherein for the sake of illustration only a sectional view through a third winding module 42 and a fourth winding module 44 is shown.
  • the winding modules 42 and 44 substantially correspond to those in FIG Fig. 1 shown first winding module 10 and each have a first winding segment 48 and 50 and a further winding segment 52 and 54, respectively.
  • the winding modules 42 and 44 are penetrated by a first transformer core 46, which is arranged annularly around the central axis 100.
  • the winding axis, not shown in this illustration, of the respective winding modules extends longitudinally within the annular first transformer core 46 in the region of the respective winding module 42, 44.
  • first busbar 56 and the second busbar 58 are for example made predominantly of copper or aluminum and which optionally have contacting possibilities, for example for screwing on a conductor.
  • the radial distance of the respective winding axis of a winding module to a respective busbar 56, 58 is approximately the same for all modules, also for the modules not shown.
  • the first winding segments 48, 50 and the second winding segments 52, 54 are arranged in sections between the busbars 56, 58. After mounting the winding modules 42, 44 on the first transformer core 46, the busbars 56, 58 can therefore be introduced into this arrangement in a particularly simple manner by placing them in a wreath-like manner.
  • the arrangement in one of the respectively existing corners of the approximately circular cross section of the respective winding modules 42, 44 is particularly advantageous.
  • all possible combinations of the arrangement of the busbars are conceivable, for example, and at the two radially arranged to the central axis positions 58 and 62.
  • the claimed by the arrangement without busbars outer contour is not adversely increased by the arrangement of the busbars.
  • the arrangement or the transformer can be made more compact.
  • connection 64, 66, 68. 70 of the winding conductor with the busbars may for example be both welded and screwed, depending on whether a subsequent dismantling of the arrangement, for example, for maintenance or repair purposes, is provided or not.
  • the design of the winding conductor as a strip conductor is particularly suitable for the electrical connection 64, 66, 68, 70 with a busbar, because the components to be connected are arranged in the connection area in each case flat against each other can and so a particularly good and low-loss electrical connection 64, 66, 68, 70 can be realized. But even with a vertical arrangement of a strip conductor to be contacted to the region of the busbar in the case of a welded joint results in an elongated weld, which is also characterized by an advantageously large contact area.
  • Fig. 4 shows a plan view of a second inventive arrangement 80, which substantially the in Fig. 3 similar to the first arrangement shown.
  • a fifth 82, sixth 84, seventh 86 and eighth 88 winding module are arranged in a circle about a central axis 100, each of which essentially corresponds to that in FIG Fig. 1 Correspond to the first winding module 10 shown.
  • the winding modules are penetrated by an annular second transformer core 98, wherein this can of course also be made with a polygonal or rectangular plan. In this case, preferably one winding module would be assigned to each leg of the transformer core. It is also a the basic shape of the transformer core corresponding polygonal configuration of the busbars conceivable.
  • the respective first windings of the winding modules 82, 84, 86, 88 are electrically connected in parallel to each other by means of the third 90 and fourth 92 busbars, the connections not being shown in this illustration. At each busbar 90, 92, a connection is provided for contacting the same with other electrical components.
EP08019577A 2008-11-08 2008-11-08 Agencement de segments d'enroulement Withdrawn EP2184749A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08019577A EP2184749A1 (fr) 2008-11-08 2008-11-08 Agencement de segments d'enroulement
PCT/EP2009/007553 WO2010051911A1 (fr) 2008-11-08 2009-10-22 Agencement de segments bobinés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08019577A EP2184749A1 (fr) 2008-11-08 2008-11-08 Agencement de segments d'enroulement

Publications (1)

Publication Number Publication Date
EP2184749A1 true EP2184749A1 (fr) 2010-05-12

Family

ID=40202869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08019577A Withdrawn EP2184749A1 (fr) 2008-11-08 2008-11-08 Agencement de segments d'enroulement

Country Status (2)

Country Link
EP (1) EP2184749A1 (fr)
WO (1) WO2010051911A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3037055A1 (de) 1980-10-01 1982-05-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Ringkern-leistungsuebertrager in kompakter bauweise
EP0557549A1 (fr) 1992-02-26 1993-09-01 HANSER, Volker Transformateur à noyau annulaire

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3037055A1 (de) 1980-10-01 1982-05-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Ringkern-leistungsuebertrager in kompakter bauweise
EP0557549A1 (fr) 1992-02-26 1993-09-01 HANSER, Volker Transformateur à noyau annulaire

Also Published As

Publication number Publication date
WO2010051911A1 (fr) 2010-05-14

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