EP0107013B1 - Réactance avec des enroulements sur des branches du noyau constituées pas des noyaux de fer en forme de disques - Google Patents

Réactance avec des enroulements sur des branches du noyau constituées pas des noyaux de fer en forme de disques Download PDF

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Publication number
EP0107013B1
EP0107013B1 EP83109084A EP83109084A EP0107013B1 EP 0107013 B1 EP0107013 B1 EP 0107013B1 EP 83109084 A EP83109084 A EP 83109084A EP 83109084 A EP83109084 A EP 83109084A EP 0107013 B1 EP0107013 B1 EP 0107013B1
Authority
EP
European Patent Office
Prior art keywords
casing
choke
tension elements
iron core
yokes
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.)
Expired
Application number
EP83109084A
Other languages
German (de)
English (en)
Other versions
EP0107013A3 (en
EP0107013A2 (fr
Inventor
Walter Dr. Dipl.-Ing. Müller
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.)
Transformatoren Union AG
Original Assignee
Transformatoren Union 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 Transformatoren Union AG filed Critical Transformatoren Union AG
Priority to AT83109084T priority Critical patent/ATE24065T1/de
Publication of EP0107013A2 publication Critical patent/EP0107013A2/fr
Publication of EP0107013A3 publication Critical patent/EP0107013A3/de
Application granted granted Critical
Publication of EP0107013B1 publication Critical patent/EP0107013B1/fr
Expired 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
    • H01F27/24—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

Definitions

  • the invention relates to chokes for large electrical outputs with windings around core legs made of iron core disks stacked at intervals in the axial direction and with yokes arranged on the end face above and below the windings, which are fixed by the iron core disks axially penetrating metallic tension elements, the tension elements being made of high-strength steel and are dimensioned taking mechanical strength into account.
  • the upper and lower yokes in such chokes must be mechanically clamped together.
  • the yokes are supported by the core laminated core and inserts made of hard material in the gaps between the core laminated core arranged one above the other.
  • the oscillation amplitudes that occur due to the magnetic tensile forces at the interfaces of the core laminated cores are kept small by the clamping force.
  • Glass-fiber reinforced plastic rods or non-magnetic steel have been used as the material for the tension elements in the center of the alternating magnetic field.
  • the tension elements consist of steel and are electrically insulated by a sleeve made of insulating material.
  • the use of glass fiber reinforced plastic rods has the disadvantage that this material flows during its aging and the use of electrically insulated metallic bolts as a tension element allows only very low magnetic longitudinal field strengths with regard to the eddy current heating in the magnetic field.
  • the invention is therefore based on the object to provide tensioning the yokes of a choke with the associated core legs and windings, the core legs centrally penetrating rods that make full use of the achievable longitudinal field strengths in the core leg and at the same time the utilization of the mechanical strength of the other components, in particular the tie rods, guaranteed in an economical manner.
  • this object is achieved in that in the area of the iron core disks and the yokes are surrounded by a closed jacket made of material with very good electrical conductivity, for example made of copper or aluminum, which is designed such that the eddy currents generated in the jacket the magnetic field Reduce the inside of the tension element to a partial amount compared to the magnetic field to be expected without the jacket, which is just sufficient to maintain the eddy currents in the jacket and that the tension element is rectangular in cross section and the longer side of the cross section is parallel to the layer direction of the sheets in the yoke .
  • the tension element consists of a plurality of bands lying parallel to one another, each of which is encompassed by a jacket made of material with a very high electrical conductivity.
  • a particularly effective development of the invention consists in that the jacket of each tension element is wound from one or more axially parallel, electrically short-circuited coils made of foil-like sheet metal strip.
  • the electrical conductivity of the material for the jacket is at least 5 times, preferably more than 25 times, as large as that of the high-strength steel of the tension elements, and that the electrical conductivity of the high-strength steel is less than 2 rn / ⁇ - mm 2 .
  • Tension elements designed according to the invention with a jacket made of an electrically highly conductive material are very advantageous because they allow central tensioning for the yokes, which is arranged in the center of the core legs, at any magnetic alternating field strengths and thus also at any desired choke power ratings.
  • Windings 1 of a multi-phase choke each comprise a core leg made of iron core disks 2 stacked one above the other in the axial direction. Between each successive iron core disk 2 there is an intermediate layer 5 made of non-magnetic material with a very high modulus of elasticity, so that this core leg represents a rigid rigid column in itself.
  • the individual iron core disks 2 are assembled in a known manner from transformer sheet metal lamellae and, like the intermediate layers 5, have an axially parallel central opening.
  • yokes 3 rest on the end faces of the core legs formed by the iron core disks 2, which are preferably designed as straight beams and are likewise composed of transformer sheet metal lamellae. Over the in the iron core discs 2 and the intermediate layers 5 of the individual core legs before Breakthroughs seen are also provided in the two yokes 3, which are congruent with the former.
  • the openings in the yokes 3, the iron core disks 2 and the intermediate layers 5 are penetrated in the longitudinal direction for each core leg by a metallic tension element 4, which has nuts 8 at its ends, which, after being tightened via disks 7, form the iron core disks 2 and press the yokes 3 firmly together.
  • the intermediate layers 5 essentially serve to adjust the magnetic resistance of the iron circuit.
  • the heating in each of the tension elements 4 is negligibly small due to the remaining field.
  • the current coating in the jacket 6 and the required wall thickness thereof depend on the enclosed cross section.
  • Copper or aluminum whose electrical conductivity is 20 to 30 times as large as the electrical conductivity of a high-strength steel which is high-alloyed with nickel, chromium and / or molybdenum, are particularly suitable as the material for the jacket 6.
  • a corrosion-neutral film for example with paper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Windings For Motors And Generators (AREA)

Claims (5)

1. Réactance pour des puissances électriques élevées, comportant des enroulements (1) disposés autour d'une branche formant noyau constituée par des disques formant noyau de fer (2), superposés axialement en étant écartés les uns des autres, et comportant des culasses (3), qui sont disposées au-dessous des enroulements et sont fixées par des tirants métalliques (4) traversant, dans une position centrée axialement, les disques (2) du noyau de fer, les tirants (4) étant réalisés en un acier très résistant et étant dimensionnés en tenant compte exclusivement de la contrainte mécanique, caractérisée par le fait que les tirants (4) sont entourés, dans la zone des disques (2) du noyau de fer et des culasses (3), par une enveloppe fermée (6) constituée en un matériau possédant une très bonne conductibilité électrique, par exemple du cuivre ou de l'aluminium, et qui est réalisée de telle sorte
que des courants de Foucault produits dans l'enveloppe (6) réduisent le champ magnétique à l'intérieur du tirant (4) par rapport au champ magnétique, auquel on peut s'attendre sans enveloppe, à une fraction qui suffit à maintenir les courants de Foucault dans l'enveloppe (6), et
que le tirant (4) possède une section transversale rectangulaire et que le grand côté de la section transversale est parallèle à la direction d'empilage des tôles dans la culasse (3).
2. Bobine d'arrêt suivant la revendication 1, caractérisée par le fait que le tirant (4) est constitué par plusieurs bandes juxtaposées parallèlement les unes aux autres, dont chacune est entourée en soi par une enveloppe (6) constituée en un matériau possédant une conductibilité électrique très élevée.
3. Bobine d'arrêt suivant la revendication 1 ou 2, caractérisée par le fait que l'enveloppe (6) de chaque tirant (4) est formée par enroulement d'une ou de plusieurs bobines à axes parallèles, courts-circuitées du point de vue électrique et constituées par une bande de tôle en forme de feuille.
4. Bobine d'arrêt suivant l'une des revendications précédentes 1 à 3, caractérisée par le fait que la conductibilité électrique du matériau prévu pour l'enveloppe (6) est égale au moins à 5 fois et de préférence à plus de 25 fois celle de l'acier très résistant des tirants (4).
5. Bobine d'arrêt suivant l'une des revendications 1 à 4, caractérisée par le fait que la conductibilité électrique de l'acier très résistant est inférieure à 2 m/Ω · mm2.
EP83109084A 1982-09-29 1983-09-14 Réactance avec des enroulements sur des branches du noyau constituées pas des noyaux de fer en forme de disques Expired EP0107013B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83109084T ATE24065T1 (de) 1982-09-29 1983-09-14 Drossel mit wicklungen um kernschenkel aus eisenkernscheiben.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823236117 DE3236117A1 (de) 1982-09-29 1982-09-29 Drossel mit wicklungen um kernschenkel aus eisenkernscheiben
DE3236117 1982-09-29

Publications (3)

Publication Number Publication Date
EP0107013A2 EP0107013A2 (fr) 1984-05-02
EP0107013A3 EP0107013A3 (en) 1984-07-04
EP0107013B1 true EP0107013B1 (fr) 1986-12-03

Family

ID=6174498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109084A Expired EP0107013B1 (fr) 1982-09-29 1983-09-14 Réactance avec des enroulements sur des branches du noyau constituées pas des noyaux de fer en forme de disques

Country Status (5)

Country Link
EP (1) EP0107013B1 (fr)
AT (1) ATE24065T1 (fr)
BR (1) BR8305296A (fr)
CA (1) CA1211170A (fr)
DE (2) DE3236117A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413359A1 (de) * 1984-04-09 1985-10-17 Transformatoren Union Ag, 7000 Stuttgart Drossel mit wicklungen um eisenkernschenkel aus eisenkernscheiben
AT390690B (de) * 1987-12-04 1990-06-11 Elin Union Ag Eisenkernschenkel fuer elektrische drosseln

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB691142A (fr) * 1900-01-01
DE1145717B (de) * 1961-04-12 1963-03-21 Licentia Gmbh Aus kaltgewalztem Blech geschichteter Kern fuer Drehstrom-Leistungs-Transformatoren und -Drosselspulen
DE2436067A1 (de) * 1974-07-26 1976-02-05 Waasner B Blechkern mit einer einrichtung zur verhinderung eines induktionsstromes in einem verbindungsbolzen
DE2544493A1 (de) * 1975-10-04 1977-04-14 Bbc Brown Boveri & Cie Drosselspule in tempelbauart
SE413716B (sv) * 1978-05-02 1980-06-16 Asea Ab Krafttransformator eller reaktor

Also Published As

Publication number Publication date
BR8305296A (pt) 1984-05-02
CA1211170A (fr) 1986-09-09
DE3368145D1 (en) 1987-01-15
EP0107013A3 (en) 1984-07-04
DE3236117A1 (de) 1984-03-29
ATE24065T1 (de) 1986-12-15
EP0107013A2 (fr) 1984-05-02

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