WO1996005603A1 - Fabrication de pellicule ferromagnetique pour noyaux de transformateurs et de moteurs - Google Patents

Fabrication de pellicule ferromagnetique pour noyaux de transformateurs et de moteurs Download PDF

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Publication number
WO1996005603A1
WO1996005603A1 PCT/SE1995/000911 SE9500911W WO9605603A1 WO 1996005603 A1 WO1996005603 A1 WO 1996005603A1 SE 9500911 W SE9500911 W SE 9500911W WO 9605603 A1 WO9605603 A1 WO 9605603A1
Authority
WO
WIPO (PCT)
Prior art keywords
iron
film
ferromagnetic
film according
ferromagnetic film
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/SE1995/000911
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English (en)
Inventor
Peter Nygren
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1996005603A1 publication Critical patent/WO1996005603A1/fr
Priority to SE9700455A priority Critical patent/SE9700455D0/xx
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • H01F41/22—Heat treatment; Thermal decomposition; Chemical vapour deposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • H01F41/24—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates from liquids
    • H01F41/26—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates from liquids using electric currents, e.g. electroplating

Definitions

  • TITLE Manufacturing of ferromagnetic film for transformer and motor cores.
  • the invention relates to the manufacturing of a film according to the precharacterizing part of claim 1 which consists of a ferromagnetic thin film for the manufacturing of magnetic cores for transformers and electrical rotating machines.
  • magnetic cores for transformers and electrical rotating machines are manufactured today with thin (approximately 0,25 - 0,5 mm) silicon alloyed iron plates with an intermediate insulation to reduce the losses due to eddy currents .
  • the plates are placed together to form a core.
  • the plate is normally manufactured with an orientation of the directions of the crystals .
  • the manufacturing of the core is time-consuming, the cores are heavy and the magnetic permeability is relatively low in normal silicon alloyed plates.
  • the purpose of the invention is to achieve a very thin and flexible ferromagnetic film with a high magnetic permeability and orientated crystal direction for the manufacturing of transformer and motor cores.
  • the losses due to eddy currents can be kept very low. Since the losses due to eddy currents are proportional to the square of the thickness of the plate, they are reduced 625 times if the thickness is 10 ⁇ m instead of the normal 0,25 mm. If the material does not contain silicon, the difference is reduced somewhat (approximately 6 times) .
  • High magnetic permeability increases the inductance and therefore the number of winding turns and the height of the core can be reduced and therefore also the size and wheight of the transformer.
  • the initial permeability for silicon alloyed orientated plate is 1.500 Vs/Am whereas it is for example for iron carbonyl 10.560 Vs/Am.
  • the flexible film makes the manufacturing of the core much simpler and quicker - the parts of the core can simply be rolled together or transported to the transformer manufacturer as prefabricated rolls and therefore the productivity is increased and the transformer cost is reduced.
  • the cost ' of the film can be kept low through cheap raw material and a continuous manufacturing process. * Lower noise level thanks to higher mechanical damping.
  • Figure 1 shows the film in cross section.
  • Figure 2 shows a possible process for manufacturing the film.
  • Figure 3 shows a joint between parts of the core.
  • A plastic film, for example polystyrene
  • the finished film consists of two layers: One plastic film, for example polystyrene, and a ferromagnetic layer of for example iron carbonyl, i.e. pure iron, which is made by heating iron pentacarbonyl to 200 degrees C.
  • One plastic film for example polystyrene
  • a ferromagnetic layer of for example iron carbonyl i.e. pure iron, which is made by heating iron pentacarbonyl to 200 degrees C.
  • the plastic layer can have a thickness of 5 ⁇ m and the ferromagnetic layer 10 ⁇ m. Thereby the filling factor of the transformer becames approximately 66%. Today the corresponding figure is approximately 85% but observe that the core can be made much smaller thanks to the higher permeability. According to figure 2 the steps in a possible manufacturing process is as follows:
  • the crystal lattice strives to orientate itself so that the easy magnetization directions, which coincide with the crystal directions, become parallel with the applied magnetic field.
  • Purified iron can be applied electrolytically on the plastic film.
  • a thin layer of an electrically conducting material for example aluminum or zinc, can first be applied on the polymer film (compare with the manufacturing of films for capacitors) after which purified iron is applied electrolytically as above.
  • a thin layer of iron carbonyl can first be applied on the polymer film as above, after which purified iron is applied electrolytically.
  • An alternative is to apply purified iron electrolytically on a polymer film with an electrically conducting layer (e.g. lead) which is then melted and/or pulled away and substituted with a new electrically insulating plastic film.
  • an electrically conducting layer e.g. lead
  • Purified iron can also be sprayed in a melted state on a teflon film.
  • the crystal direction can also in all these cases be orientated by a magnetic field during the crystallization as above.
  • the roll with the finished film can be cut diagonally to form joints between the parts of the core in the transformer.
  • the cross-section should be sheared, i.e. the end surface folded to one side with the metal surface outwards in order to give contact metal to metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Soft Magnetic Materials (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

On produit un noyau d'électroaimant en appliquant un mince revêtement de fer sur un substrat mince, c'est-à-dire une pellicule, de polymère. La pellicule recouverte est formée, par exemple enroulée, sur un noyau. Le revêtement de fer est appliqué par un processus à base de carbonyle de fer, ou par un procédé électrolytique ou par pulvérisation. Ce noyau est utilisé dans des transformateurs ou des machines dynamoélectriques.
PCT/SE1995/000911 1994-08-12 1995-08-08 Fabrication de pellicule ferromagnetique pour noyaux de transformateurs et de moteurs Ceased WO1996005603A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9700455A SE9700455D0 (sv) 1994-08-12 1997-02-11 Tillverkning av ferromagnetisk folie för transformator- och motorkärnor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9402704-2 1994-08-12
SE9402704A SE9402704D0 (sv) 1994-08-12 1994-08-12 Ferromagnetisk folie för transformator-och motorkärnor

Publications (1)

Publication Number Publication Date
WO1996005603A1 true WO1996005603A1 (fr) 1996-02-22

Family

ID=20394909

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/000911 Ceased WO1996005603A1 (fr) 1994-08-12 1995-08-08 Fabrication de pellicule ferromagnetique pour noyaux de transformateurs et de moteurs

Country Status (2)

Country Link
SE (1) SE9402704D0 (fr)
WO (1) WO1996005603A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1267546A (en) * 1968-07-12 1972-03-22 Leonardus Franciscus Van Berg Inductive winding
DE2914123A1 (de) * 1979-04-07 1980-10-23 Philips Patentverwaltung Verfahren zum herstellen von ringbandkernen fuer transformatoren
JPS62179706A (ja) * 1986-02-04 1987-08-06 Fujitsu Ltd 軟質磁性材料の製造方法
US4790064A (en) * 1985-12-04 1988-12-13 General Electric Company Method of manufacturing an amorphous metal transformer core and coil assembly
EP0367144A2 (fr) * 1988-10-31 1990-05-09 Matsushita Electric Industrial Co., Ltd. Matériau magnétique laminé et procédé de fabrication
JPH02191310A (ja) * 1989-11-07 1990-07-27 Seiko Epson Corp テープ状永久磁石の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1267546A (en) * 1968-07-12 1972-03-22 Leonardus Franciscus Van Berg Inductive winding
DE2914123A1 (de) * 1979-04-07 1980-10-23 Philips Patentverwaltung Verfahren zum herstellen von ringbandkernen fuer transformatoren
US4790064A (en) * 1985-12-04 1988-12-13 General Electric Company Method of manufacturing an amorphous metal transformer core and coil assembly
JPS62179706A (ja) * 1986-02-04 1987-08-06 Fujitsu Ltd 軟質磁性材料の製造方法
EP0367144A2 (fr) * 1988-10-31 1990-05-09 Matsushita Electric Industrial Co., Ltd. Matériau magnétique laminé et procédé de fabrication
JPH02191310A (ja) * 1989-11-07 1990-07-27 Seiko Epson Corp テープ状永久磁石の製造方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 12, No. 24, E-576; & JP,A,62 179 706 (FUJITSU LTD), 6 August 1987. *
PATENT ABSTRACTS OF JAPAN, Vol. 14, No. 467, E-989; & JP,A,02 191 310 (SEIKO EPSON CORP), 27 July 1990. *

Also Published As

Publication number Publication date
SE9402704D0 (sv) 1994-08-12

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