EP0618596A1 - Luftdrosselspule - Google Patents

Luftdrosselspule Download PDF

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Publication number
EP0618596A1
EP0618596A1 EP94200845A EP94200845A EP0618596A1 EP 0618596 A1 EP0618596 A1 EP 0618596A1 EP 94200845 A EP94200845 A EP 94200845A EP 94200845 A EP94200845 A EP 94200845A EP 0618596 A1 EP0618596 A1 EP 0618596A1
Authority
EP
European Patent Office
Prior art keywords
winding
reactor
housing
pressure
pressure force
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Withdrawn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
EP94200845A
Other languages
English (en)
French (fr)
Inventor
Marinus Martinus Engelbertus Maria Jansen
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.)
Smit Transformatoren BV
Original Assignee
Smit Transformatoren BV
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 Smit Transformatoren BV filed Critical Smit Transformatoren BV
Publication of EP0618596A1 publication Critical patent/EP0618596A1/de
Withdrawn legal-status Critical Current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
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/08—Fixed transformers not covered by group H01F19/00 characterised by the structure without magnetic core
    • 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

  • the invention relates to a reactor for application in a transport or distribution network for electrical energy and comprising at least one winding arranged in a metal housing, wherein means are arranged for applying an axial pressure force to the winding.
  • Such reactors are generally known.
  • Such reactors also known as choke coils, serve to compensate reactive power that is generated in such a distribution network due to an excess of capacitive loads.
  • the object of the present invention is to provide such a reactor, wherein the above stated drawbacks are avoided.
  • a magnetic circuit is arranged inside the housing to shield the stray field generated by the winding, wherein at least a part of the magnetic circuit functions as means for transmitting from the housing the axial pressure force to be applied to the winding.
  • the reactor 1 comprises a housing 2, which housing is formed by a bottom 3, an upper wall 4, two side walls 5,6, a rear wall not shown in the drawing and a front wall 7. Front wall 7 is herein embodied for removal from the rest of the housing. The other walls are joined together by a weld construction into one housing. Side walls 5,6, bottom 3 and upper wall 4 are reinforced by means of ribs 8. A magnetic lamination 9 is arranged in the housing against bottom 3, upper wall 4 and both side walls 5,6, wherein the magnetic lamination is formed by strips of magnetic steel 10 stacked against each other.
  • the magnetic steel strips 10 are joined together such that each layer forms part of the magnetic circuit, wherein the strips adjoining different walls mutually engage at the corners in order to obtain an interlock.
  • Fixed supports not shown in the drawing are arranged to secure the lamination, while the lamination is fixed in the housing by the supports 11 which are provided with set screws 12.
  • beams 13 manufactured from wood or multi-ply or other insulation material.
  • a disc 14 which is manufactured from wood or multi-ply or other insulation material and which is provided with a shoulder 15.
  • a hollow core 16 which is manufactured from insulating material, for instance pressed paper or plastic.
  • the actual winding 17 wound from rectangular wire or stranded cable is arranged around the hollow core 16.
  • a plate 18 is arranged on the top of winding 17.
  • This plate 18, as the disc 14, is provided with an annular shoulder 19.
  • the shoulder 19 here also serves to center the winding 17 relative to the plate.
  • a pressure plate 20 Arranged above plate 18 is a pressure plate 20, the form and dimensions of which correspond substantially with those of plate 18.
  • On its upper side the pressure plate rests against the underside of the upper lamination 9, while two wedge paths 21 are recessed into the pressure plate under which two pairs of wedges 22 are situated.
  • the underside of the wedges rests on plate 18.
  • Each pair of wedges is mutually joined by means of a threaded end 23 manufactured from insulating material and forming a tensioning device. Nuts 24 are screwed onto the ends of the threaded ends.
  • a high-voltage lead-through 25 is arranged, the lower end of which is connected to the middle 26 of winding 17.
  • the middle of the winding is in any case easiest to insulate with respect to earth.
  • Both the top and bottom end of the winding are joined to a low-voltage lead-through 27 by means of connections not shown in the drawing.
  • housing 1 is further filled with a suitable oil resistant to high voltage, for instance transformer oil.
  • a suitable oil resistant to high voltage for instance transformer oil.
  • provisions such as a filling opening, an expansion vessel and a Buchholz protective relay.
  • the housing is constructed, for instance by means of welding.
  • the front wall 7 is herein left off for the time being.
  • the magnetic lamination 9 is then arranged in the housing. It is easy to place the housing on its rear wall during stacking of the lamination so that stacking of the lamination can take place easily.
  • the housing is again placed upright, the leads 25, 27 and a part of the auxiliary equipment are arranged and beams 13 are placed, whereafter the winding, already pre-wound onto the hollow core and placed on the disc 14, and already provided with the plate 18, is pushed onto the beams 13.
  • the wedge paths 21 are provided with a material with a low coefficient of friction such as teflon, to generate sufficient tension by means of tightening nut 23 to fixedly clamp the winding 17 such that in all conditions the windings of the coil will remain pressed against each other due to the pressure force applied from the housing, wherein only such a small deformation of the construction occurs that it is reversible.
  • a temporary pressure element (not shown in the drawing) between the plate 18 and the pressure plate 20.
  • a temporary pressure element such as cushions used for instance in rescue operations.
  • a pressure element which can be pumped up with a liquid, for instance transformer oil. By inflating or pumping up such a cushion the tension is diverted from the wedges and the wedge paths so that these latter can be adjusted to the required tension.
  • the temporary pressure element can then be emptied, after which it can be removed.
  • the front wall 7 is arranged and the housing is filled with oil.
  • the part of the magnetic circuit adjoining the bottom and the part of the magnetic circuit adjoining the upper wall contribute to the rigidity of the bottom respectively the upper wall, so that these wall elements can transfer the forces to be applied to the winding from the front, rear and side walls of the housing.
  • the upper wall and the bottom are provided with reinforcing ribs, which of course contribute to the rigidity, the use of the relevant part of the magnetic circuit nevertheless enables considerable limitation of the dimensions of the ribs.
  • the invention is of course not limited to single-phase reactors as shown here.
  • a construction can be made in which several windings are accommodated in a housing, for instance two windings connected in series or in parallel, or three windings together forming a three-phase reactor.
  • omission of the lamination 9 along both side walls can then be even considered, as these are no longer required as closing path for the magnetic circuit.
  • the lamination 9 along the top and bottom wall remain present in the construction however, both to guide the magnetic field and also to reinforce the top and bottom wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP94200845A 1993-04-02 1994-03-29 Luftdrosselspule Withdrawn EP0618596A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9300590 1993-04-02
NL9300590A NL9300590A (nl) 1993-04-02 1993-04-02 Luchtspoel.

Publications (1)

Publication Number Publication Date
EP0618596A1 true EP0618596A1 (de) 1994-10-05

Family

ID=19862251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94200845A Withdrawn EP0618596A1 (de) 1993-04-02 1994-03-29 Luftdrosselspule

Country Status (2)

Country Link
EP (1) EP0618596A1 (de)
NL (1) NL9300590A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2819133A1 (de) * 2013-06-25 2014-12-31 ABB Technology AG Elektrische Spulenvorrichtung für elektrotechnische und leistungselektronische Anwendungen
WO2018077566A1 (de) * 2016-10-26 2018-05-03 Siemens Aktiengesellschaft Elektrisches gerät mit dynamischer wicklungspressung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE631443A (de) *
FR1273720A (fr) * 1960-11-16 1961-10-13 Thomson Houston Comp Francaise Perfectionnements à la fabrication des transformateurs
DE1513867A1 (de) * 1965-03-18 1969-02-20 Gen Electric Elektrische Induktionsvorrichtung
JPS5638810A (en) * 1979-09-07 1981-04-14 Hitachi Ltd Air-core reactor providing with magnetic shielding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE631443A (de) *
FR1273720A (fr) * 1960-11-16 1961-10-13 Thomson Houston Comp Francaise Perfectionnements à la fabrication des transformateurs
DE1513867A1 (de) * 1965-03-18 1969-02-20 Gen Electric Elektrische Induktionsvorrichtung
JPS5638810A (en) * 1979-09-07 1981-04-14 Hitachi Ltd Air-core reactor providing with magnetic shielding

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 5, no. 95 (E - 62) 20 June 1981 (1981-06-20) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2819133A1 (de) * 2013-06-25 2014-12-31 ABB Technology AG Elektrische Spulenvorrichtung für elektrotechnische und leistungselektronische Anwendungen
WO2018077566A1 (de) * 2016-10-26 2018-05-03 Siemens Aktiengesellschaft Elektrisches gerät mit dynamischer wicklungspressung
US10269483B2 (en) 2016-10-26 2019-04-23 Siemens Aktiengesellschaft Electrical device with dynamic winding pressing

Also Published As

Publication number Publication date
NL9300590A (nl) 1994-11-01

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