EP1870907B1 - Elektrischer Leiter aus Aluminium mit einer magnetischen Oberfläche und Methode zu dessen Herstellung - Google Patents

Elektrischer Leiter aus Aluminium mit einer magnetischen Oberfläche und Methode zu dessen Herstellung Download PDF

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Publication number
EP1870907B1
EP1870907B1 EP06446001A EP06446001A EP1870907B1 EP 1870907 B1 EP1870907 B1 EP 1870907B1 EP 06446001 A EP06446001 A EP 06446001A EP 06446001 A EP06446001 A EP 06446001A EP 1870907 B1 EP1870907 B1 EP 1870907B1
Authority
EP
European Patent Office
Prior art keywords
layer
aluminium
pores
conductor
magnetic
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.)
Not-in-force
Application number
EP06446001A
Other languages
English (en)
French (fr)
Other versions
EP1870907A1 (de
Inventor
Nick Warren
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 Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Priority to EP06446001A priority Critical patent/EP1870907B1/de
Priority to DE602006011726T priority patent/DE602006011726D1/de
Priority to AT06446001T priority patent/ATE455352T1/de
Publication of EP1870907A1 publication Critical patent/EP1870907A1/de
Application granted granted Critical
Publication of EP1870907B1 publication Critical patent/EP1870907B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
    • H01B19/04—Treating the surfaces, e.g. applying coatings

Definitions

  • the present invention relates to a method of providing an electric conductor made of aluminium or enclosed by an aluminium layer with a magnetic outer layer.
  • the invention also relates to a corresponding conductor made of aluminium or enclosed by an aluminium layer, provided with a magnetic outer layer.
  • the conductor may be made of solid aluminium or by any other metal provided with an outer layer of aluminium or an aluminium alloy. Such an outer layer of aluminium may or may not be electrically in contact with the conductor.
  • the conductor is a conductor for intermediate and high voltage applications, wherein intermediate voltage is referred to as from about 1 kV up to about 40 kV, and high voltage is referred to as from about 40 kV up to about 150 kV.
  • the conductor is an air-cooled overhead transmission wire.
  • other conductors are not excluded from the scope of the invention.
  • an aluminium conductor may be used in a wire or cable for power transmission.
  • a layer of aluminium may be applied to enclose a conductor core made of a material other than aluminium.
  • a shield made of a ferromagnetic material may be provided around the periphery of said wire or cable in order to screen off the electric field generated by the wire or cable upon transmission of current through the latter.
  • the shield may be comprised by a solid layer of such a ferromagnetic material or by any kind of wiring of such a material.
  • the layer or winding may be applied directly onto the outer surface of the aluminium conductor or onto an intermediate layer of any other material, such as a polymer layer.
  • the object of the invention is to provide an alternative method of providing an aluminium conductor or a conductor enclosed in an aluminium layer with a shield of a magnetic material for the purpose of screening off an electric field generated by said conductor upon operation thereof.
  • Said method should provide a cost effective alternative to contemporary methods of prior art. It should also promote the generation of a shield that adheres well to the aluminium conductor.
  • the object of the invention is also to present an aluminium conductor provided with an outer shield of a magnetic material, by which the shield adheres well to the aluminium conductor, and may be produced cost effectively in comparison to corresponding contemporary aluminium conductors of prior art.
  • the object of the invention is achieved by the method initially defined, characterised in that it includes the steps of: anodising the outer surface of said conductor or enclosing layer, thereby generating a porous outer alumina layer, and filling at least a part of said pores with magnetic particles.
  • the electrolyte in which the anodising takes place may be an oxalic, sulphuric or phosphoric solution.
  • hexagonally ordered pore arrays may be obtained under a constant anodic potential in phosphoric acid.
  • Porous anodic alumina films may, for example, be generated in nitric acid electrolytes.
  • the pores are regular and uniform, with a diameter of tens of a nm up to approximately 50 nm. They may have an inter-pore distance of approximately 100-400 nm.
  • the filling of the pores may be conducted by means of an electrochemical process in which the alumina layer is submersed in a bath containing said magnetic particles.
  • the process may be an anodic process.
  • Fe iron
  • FeSO 4 NH 4 )SO 4 .6H 2 O (0,20 mol/l) and H 3 BO 4 (0,48 mol/l) at 20 °C with constant voltage of 10 V
  • the filling of the pores is followed by a sealing thereof, preferably in a subsequent electrochemical process in which a sealing material is deposited onto the alumina layer.
  • a sealing material is deposited onto the alumina layer.
  • the object of the invention is also achieved by means of the conductor initially defined, characterised in that said magnetic layer comprises a porous alumina layer, the pores of which are at least partly filled with a magnetic material.
  • the porous alumina layer is built on the conductor itself.
  • the conductor is based on a material other than aluminium and enclosed in an aluminium layer, the porous alumina layer should be built on said enclosing aluminium layer.
  • the aluminium layer may or may not be part of the conductor. For example, it may be separated from the conductor any electrically insulating layer, e.g. a polymer layer.
  • the magnetic layer may, but need not, be the outmost layer of a wire or cable to which the conductor belongs.
  • said pores are sealed towards the surrounding environment by a material other than said magnetic material.
  • the sealing of the pores is obtained through a further anodising of the alumina layer, by which the anodising conditions are chosen such that a barrier layer of alumina is produced on top of the porous layer filled with magnetic material.
  • the anodising of the conductor, as well as the deposition of the magnetic material and the subsequent sealing of the pores may be a batch process or a continuous process.
  • a conductor made of an aluminium alloy is subjected to an anodising process in a nitric acid electrolyte by which a layer of porous alumina is generated on the surface of the conductor.
  • a hexagonal porous structure is obtained. The pores are open.
  • a constant voltage of 10 V is applied in order to achieve a deposition of Fe into the pores of the alumina layer.
  • the electro-deposition of Fe is ended.
  • the alumina layer is sealed through a further anodising process, in which the process parameters have been changed in order to promote the generation of a barrier layer of alumina on top of the already generated, porous layer.

Landscapes

  • Insulated Conductors (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Non-Insulated Conductors (AREA)
  • Coils Or Transformers For Communication (AREA)

Claims (8)

  1. Ein Verfahren zum Bereitstellen eines elektrischen Leiters, der aus Aluminium hergestellt ist oder von einer Aluminiumschicht eingeschlossen wird, mit einer magnetischen äußeren Oberfläche, dadurch gekennzeichnet, dass das Verfahren die Schritte umfasst:
    Anodisieren der äußeren Oberfläche des Leiters oder der Aluminiumschicht, dabei Generieren einer porösen, äußeren Aluminiumschicht, und
    Füllen von zumindest einem Teil der Poren mit magnetischen Partikeln.
  2. Ein Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass nach dem Füllen der Poren die zumindest teilweise gefüllten Poren abgedichtet werden.
  3. Ein Verfahren nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die magnetischen Partikel Nanopartikel umfassen.
  4. Ein Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Füllen der Poren die Schritte umfasst Tauchen der Aluminiumschicht in ein Bad, das die magnetischen Partikel enthält, und Aussetzen der Aluminiumschicht einem elektrochemischen Prozess in dem Bad.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der elektrochemische Prozess ein anodischer Prozess ist.
  6. Verfahren nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die magnetischen Partikel ein ferromagnetisches Material umfassen, das durch Galvanisieren in die Poren der Aluminiumschicht abgeschieden wird.
  7. Ein Leiter, der aus Aluminium hergestellt ist oder von einer Aluminiumschicht umgeben wird, und der mit einer magnetischen äußeren Schicht bereitgestellt wird, dadurch gekennzeichnet, dass die magnetische äußere Schicht eine poröse Aluminiumschicht umfasst, deren Poren zumindest teilweise mit einem magnetischen Material gefüllt sind.
  8. Ein Leiter nach Anspruch 7, dadurch gekennzeichnet, dass er eine luftgekühlte Oberleitung für die Übertragung ist.
EP06446001A 2006-06-22 2006-06-22 Elektrischer Leiter aus Aluminium mit einer magnetischen Oberfläche und Methode zu dessen Herstellung Not-in-force EP1870907B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP06446001A EP1870907B1 (de) 2006-06-22 2006-06-22 Elektrischer Leiter aus Aluminium mit einer magnetischen Oberfläche und Methode zu dessen Herstellung
DE602006011726T DE602006011726D1 (de) 2006-06-22 2006-06-22 Elektrischer Leiter aus Aluminium mit einer magnetischen Oberfläche und Methode zu dessen Herstellung
AT06446001T ATE455352T1 (de) 2006-06-22 2006-06-22 Elektrischer leiter aus aluminium mit einer magnetischen oberfläche und methode zu dessen herstellung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06446001A EP1870907B1 (de) 2006-06-22 2006-06-22 Elektrischer Leiter aus Aluminium mit einer magnetischen Oberfläche und Methode zu dessen Herstellung

Publications (2)

Publication Number Publication Date
EP1870907A1 EP1870907A1 (de) 2007-12-26
EP1870907B1 true EP1870907B1 (de) 2010-01-13

Family

ID=37434041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06446001A Not-in-force EP1870907B1 (de) 2006-06-22 2006-06-22 Elektrischer Leiter aus Aluminium mit einer magnetischen Oberfläche und Methode zu dessen Herstellung

Country Status (3)

Country Link
EP (1) EP1870907B1 (de)
AT (1) ATE455352T1 (de)
DE (1) DE602006011726D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236311B (zh) * 2013-04-15 2015-07-15 国家电网公司 一种纳米功能化防覆冰导线
CN103247379B (zh) * 2013-04-15 2015-07-15 国家电网公司 防覆冰纳米功能化导线
US10559536B2 (en) 2018-06-26 2020-02-11 Abb Schweiz Ag Multi-layer conductors for noise reduction in power electronics
CN113430615B (zh) * 2021-06-09 2022-02-15 华南理工大学 一种阳极氧化铝膜及其制备方法和应用

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990009670A1 (fr) * 1989-02-14 1990-08-23 Sumitomo Electric Industries, Ltd. Fil electrique isole
DE29708105U1 (de) * 1997-05-05 1997-10-09 Brecht Thomas Magnetpartikelabschirmungssystem gegen elektromagnetische Wellen, die Störeinstrahlungen in Signalkabeln verursachen
JP3754876B2 (ja) * 2000-07-03 2006-03-15 キヤノン株式会社 細孔を有する構造体の製造方法及び細孔を有する構造体

Also Published As

Publication number Publication date
ATE455352T1 (de) 2010-01-15
EP1870907A1 (de) 2007-12-26
DE602006011726D1 (de) 2010-03-04

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