EP1500113A1 - Fil emaille a resistance magnetique et procede de fabrication associe, enroulement constitue de ce fil et procede de fabrication associe - Google Patents

Fil emaille a resistance magnetique et procede de fabrication associe, enroulement constitue de ce fil et procede de fabrication associe

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Publication number
EP1500113A1
EP1500113A1 EP03715831A EP03715831A EP1500113A1 EP 1500113 A1 EP1500113 A1 EP 1500113A1 EP 03715831 A EP03715831 A EP 03715831A EP 03715831 A EP03715831 A EP 03715831A EP 1500113 A1 EP1500113 A1 EP 1500113A1
Authority
EP
European Patent Office
Prior art keywords
magnetically soft
magnetoresistant
enameled wire
varnish
permalloy
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Withdrawn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
EP03715831A
Other languages
German (de)
English (en)
Other versions
EP1500113A4 (fr
Inventor
Jongo Yoon
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.)
WEDO CO., LTD.
Original Assignee
Jongo Yoon
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 Jongo Yoon filed Critical Jongo Yoon
Priority claimed from KR1020030023238A external-priority patent/KR100585993B1/ko
Publication of EP1500113A1 publication Critical patent/EP1500113A1/fr
Publication of EP1500113A4 publication Critical patent/EP1500113A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core

Definitions

  • the present invention relates to a magnetoresistant enameled wire, and more particularly to a magnetoresistant enameled wire, a method for manufacturing the magnetoresistant enameled wire, a magnetoresistant coil using the magnetoresistant wire, and a method for manufacturing the magnetoresistant coil, the magnetoresistant enameled wire showing improved conductivity by reducing resistance of a conductor since the wire exhibits effects similar to anisotropic magnetoresistance or tunneling magnetoresistance when it is manufactured in the form of a coil, and externally exhibiting a strong magnetic flux density.
  • Korean Laid-Open Publication No. 1992-013493 discloses an oxide magnetic material utilized for power sources of various electric appliances, particularly, a composite oxide magnetic material which has low power loss, high saturation magnetic flux density, and low magnetic flux density so as to be capable of miniaturizing the power supply of industrial equipments such as TV, VCR, computer, facsimile, etc., and of which main component is Fe 2 O 3 , ZnO and MnO.
  • the characteristics of the oxide magnetic material are shown in Table 2 below.
  • Korean Laid-Open Publication No. 1993-0001250 discloses a low power loss oxide magnetic material and a manufacturing method thereof and, in more detail, a composite oxide of Mn-Zn series for the core of the transformer utilized for a power supply of display monitor and a manufacturing method thereof.
  • Korean Utility Model Patent Laid-Open No. 20-0166183 discloses an electromagnetic wave-shielding wire, which is an alloy composed of ferromagnetic nickel and cobalt having high magnetic permeability. It's object is to provide the electromagnetic wave-shielding wire capable of minimizing the bad effect associated with the human body and data error and transmission energy loss of the electromagnetic media which are caused by an exterior magnetic field being effect to the electric wire.
  • the ferromagnetic nickel and cobalt alloy shield having a thickness of 8 ⁇ m to 0.4mm is a high magnetic permeability material and condenses and seals the electromagnetic wave so as to prevent the electromagnetic wave, especially the magnetic field from permeating, resulting in prevention of radiation outside.
  • the electric field can considerably be shield using the high conductivity material or ground system, it is difficult to shield the magnetic field due to the permeability ofthe magnetic field.
  • the electric field is generated in a straightforward direction from the origin and can be removed or weakened by wood, building, skin of human, etc.
  • the magnetic field is produced in the form of circle on the axis ofthe origin such that it is not easily removed or weakened by the wood, building, skin of human, etc.
  • the household electrical appliances use 60Hz alternating current and battery is a direct current source.
  • the alternating current produces magnetic fields generating weak direct current, which is called induction currents and make a bad effect to the human body.
  • induction currents weak direct current
  • the direct current does not generate the induction currents.
  • Korean Patent Laid-Open No. 2000-0033283 discloses a speaker voice coil manufactured in such a way of winding the coil around the support tube, fitting the windings ofthe coil to each other by means of adhesive tape, and doping iron oxide so as to form a magnetic layer thereon. Also, Korean Patent Laid-Open No.
  • 2000-0033282 discloses a speaker voice coil manufactured by forming an isolation layer and fusion layer on the outer surface of coated wire and forming an iron oxide magnetic coat or adding the iron oxide magnetic substance to the fusion layer.
  • These kinds of speak voice coils have advantages in that the voice coil is fixed to the center ofthe thickness of the front plate which composes of the voice coil by the iron oxide magnetic substance coated onto the coil or the wire when the voice coil is installed by coupling to the axel of the rear plate ofthe speak using a separate jig.
  • the voice coil is identically fixed to the center of the thickness of the front plate since the iron oxide always creates the exterior magnetic field.
  • the voice coil maintains a predetermined distance from the speaker located rear side in the magnetic levitation effect while maintaining its center, which give effects of improvement of the sound distortion, i.e. Klirrfactor, and productivity increase.
  • iron oxides can be divided into FeO, Fe 3 O 4 , Fe 2 O 3 and Fe 2 O 3 can be classified into ⁇ -Fe 2 O 3 and ⁇ -Fe 2 O 3 .
  • Fe 3 O 4 , and ⁇ -Fe 2 O 3 have spontaneous magnetization values and their coercive forces are very low.
  • Fe 3 O 4 , and ⁇ -Fe 2 O 3 have the coercive force of approximate 200 to 450 Oe and saturation magnetization values of respective 0.6 and 0.5 Tesla, and their residual magnetization values are about 80% of the saturation magnetization value.
  • the coercive force of Fe 3 O and ⁇ -Fe 2 O 3 is enough for exterior magnetic field of voice coil.
  • the enameled wire is called magnetic wire in general, and is manufactured in combination with the coating, wire-drawing, and varnish manufacturing techniques.
  • the conventional enameled wire has drawbacks in that there is no solution for inhibiting the heat generation caused by the resistance ofthe wire itself, resulting in energy loss. Due to this problem, the thermal resistance of the varnish for enameled wire has been important.
  • FIG. 1 is a conceptual view for illustrating directions of magnetic field when the high permeability substance is coated onto the conductor for obtaining an effect similar to the anisotropic magnetoresistance.
  • FIG. 2 is a conceptual view for illustrating a magnetic field formation in a typical enameled wire.
  • the present invention provides a magnetoresistant enameled wire coated with an anisotropic magnetoresistant substance or a substance having an equivalent effect thereto.
  • a method for manufacturing a magnetoresistant coil includes manufacturing a coil by winding the magnetoresistant enameled wire coated with the material for obtaining the effect similar to the magnetoresistance effect.
  • Thin film is fabricated by doping any substance on the flat board in the thickness of one to several thousands atomic layers so as to obtain various characteristics other than in a lump of that material. Furthermore, the thin film fabricated by layering a few different materials shows special characteristics.
  • the thin film can be patterned with devices such as resisters, coils, condensers, transistors, etc. so as to be used for core parts of the CPU, memories, and hard disc, etc. In order to utilize the thin film, it is required to analyze the crystal structure, crystal axis, and the accuracy of thickness.
  • the magnetoresistant material is manufactured by alternately doping the magnetic substance and non-magnetic substance on the silicon substrate several times. Samsung Electronics developed a silent high capacity hard disk drive (HDD) of
  • Ferromagnetic resistance device uses the negative magnetoresistance effect in which the resistance linearly decreases or anisotropic magnetoresistance effect in which the resistance changes in anisotropic manner according to the angle between the magnetization direction and the current direction.
  • the ferromagnetic resistance device should have a superior tolerance to the low magnetic field, is formed in bent line shape thin film for device miniaturization and high magnetization, and uses a Ni-Co alloy.
  • the ferromagnetic resistance device characteristically detects the direction of the magnetic field over the saturation magnetization (Hs), stabilizes the output level regardless of strength of the magnetic field, lowers temperature fluctuation ofthe output in comparison with the semiconductor, and can be used in high temperature. Also, it is possible to integrally arrange a plurality of sensors on the same substrate, enables to multi function, and maximize outputs in low magnetic field and then immediately transit to saturation state.
  • AMR anisotropic magnetoresistance
  • the Permalloy shows a change about 2% and are used for typical MR sensor or magnetic reproducing head. In other words, this is called longitudinal effect or sound magnetoresistance .
  • GMR giant magnetoresistant
  • magentoresistance effect or the like will be described hereinafter in more detail.
  • an enameled wire including a spiral of a paramagnetic material such as gold, silver, copper, aluminum, etc. can form a conductor
  • high magnetic permeability material powders are diluted in an insulating varnish for coating an enameled wire and a self-bonding insulating varnish and coated onto the varnishes to exhibit effects similar to anisotropic magnetoresistance.
  • High magnetic permeability materials are magnetized in a first magnetic field created when the enameled wire is electricity-applied. At this time, the enameled wire is positioned in a second magnetic field created by the high magnetic permeability material to make spins well flow in a predetermined direction, thereby reducing electric resistance.
  • the magnetoresistant coil of the present invention is manufactured by winding the magnetoresistant enameled wire manufactured by coating the enameled wire with material showing the magnetoresistance effect or similar effect.
  • the material having similar effect to anisotropic magnetoresistance can be coated onto the enameled wire in various manners.
  • the coated high permeability material is magnetized so as to form the magnetic fields simultaneously inside and outside the wire stronger than in the conventional coil.
  • the electric resistance of the conductor decreases as in the anisotropic magnetoresistant or tunneling magnetoresistance effects. Using this effect, the conductivity of the coil is enhanced so as to inhibit the temperature rise, resulting in minimization of the energy loss.
  • the magnetic field generated from the conductive core wire of the enameled wire while the electric current flows through the coil magnetizes the high permeability material such that the magnetic field created by the dependently magnetized high permeability material generates the magnetic field greater than that formed inside and outside the enameled wire.
  • the high permeability material should have a magnetic flux density greater than that of iron oxide. It is difficult to obtain the effect of the present invention with the iron oxide and the effect is weak even though it can be obtained, in the normal temperature.
  • Compounds usable as the high magnetic permeability materials in the present invention are divided into the following three categories, and most of magnetically soft materials and low-loss oxide magnetic materials can be used. i) magnetoresistant materials containing at least one metal selected from rare earth metals and transition metals, in particular high magnetic permeability magnetically soft alloys; ii) magnetoresistant materials containing at least one metal selected from rare earth metals and transition metals, in particular high magnetic permeability magnetically soft composite oxides; and iii) magnetoresistant materials containing at least one metal selected from rare earth metals and transition metals, in particular high magnetic permeability magnetically soft composite nitrides.
  • a mixture of these compounds can be contained in an insulating varnish of the present invention.
  • magnetically hard materials which are permanent magnet materials
  • the magnetic materials are largely divided into ferromagnetic materials and paramagnetic materials.
  • the ferromagnetic materials are sub-divided into magnetically soft materials and magnetically hard materials.
  • the magnetically soft materials refer to high magnetic permeability materials which are magnetized in a weak magnetic field.
  • the magnetically hard materials refer to high resistance magnetic materials capable of maintaining magnetic flux density to be constant against a magnetic field which reduces magnetic flux by a magnet. In a place where a current flows to form a high magnetic field, the magnetically hard materials can reduce resistance.
  • magnetically soft materials having a high magnetic permeability for common electrical and electronic uses.
  • Representative examples of the magnetically soft materials include metallic magnetically soft materials such as pure iron, Sendust, silicon steel, Permalloys, amorphous alloys, etc.
  • the Permalloys include 45 Permalloy, 78 Permalloy and 81 Permalloy and the like according to their nickel contents. Further, the Permalloys Mo Permalloy, Cr Permalloy, Cu Permalloy, Si Permalloy, Ti Permalloy, Mu metal and the like containing other elements to improve the magnetic permeability.
  • the magnetically soft materials include:
  • Mn-Zn-based magnetically soft ferrites containing Fe 2 O 3 , Mno, ZnO as main components and NiO, MgO, CuO, SiO 2 , CaO, V 2 O 5 , TiO , Nb 2 O 5 , etc., as property- improving additives,
  • Fe-B-M-N-R-based magnetically soft alloy powders wherein M is an element selected from Hf, Zr and Nb, N is Cu element, R is at least one element selected from Ti, V, Ta, Cr, Mn, Mo, W, Au, Ag, Zn, Ga and Ge),
  • Fe-based magnetically soft alloy powders ((Fe ⁇ . x M x ) ⁇ 00 . a -b-c- d SiaAlbB c K ) (wherein M is Co, Ni or a mixture thereof, K is at least one element selected from Nb,
  • Fe-based magnetically soft alloy powders Fe is a base, either Co or Ni, and an additive is at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W) ,
  • NiO nickel oxide
  • ZnO zinc oxide
  • CuO copper oxide
  • magnetically soft powders having a composition consisting of Fe-Co-(at least one element selected from Sm, Er, Tm, Yb and Ho as rare earth metals)-(at least one element selected from C, N, O and B, elements for microcrystallization),
  • the magnetic materials of the present invention have a relatively low magnetic permeability, residual magnetic flux density (BR) and maximum energy product (BH) max , they are preferably used in the forms of alloys, oxides, nitrides or mixtures thereof.
  • the term "magnetoresistant materials” used herein refers to the high magnetic permeability materials and the magnetically soft materials, and the term “magnetically hard materials” refers to permanent magnet materials having a high coercive force.
  • the ferrites among the magnetically soft materials and the magnetically hard materials refer to composite oxides and prepared by mixing raw materials and calcining the mixture, or by other processes. The ferrites are not prepared by simply diluting iron oxides. Examples of the ferrites include barium-iron-based composite oxides and strontium-iron-based composite oxides. These ferrites are prepared as follows.
  • the ground material is applied to a method for producing an isotropic composite oxide and a method for producing an anisotropic composite oxide.
  • a binder or a lubricant is mixed with the ground material, and the resulting mixture is subjected to press molding to harden into a desired shape and size.
  • pressing is carried out in magnetic field to align the magnetic direction, and pressurizing and molding follow. The series of steps improves magnetization in next steps.
  • Both the isotropic and anisotropic ferrites are sintered in a furnace. At this time, these ferrites are hardened by heating them to 1,000 ° C over 25 ⁇ 26 hours.
  • the magnetoresistant materials used in the present invention are classified into oxides containing no metal components, nitrides and compounds containing metal components. This classification is based on conductivity.
  • the magnetoresistant materials are used in the form of a dispersion in a varnish.
  • a conductive magnetoresistant material containing metal components is used, the material is coated as closely to a conductor as possible and then an insulating layer is preferably formed on a shell so as to prevent breakdown of insulation capacity.
  • a space between a conductive core wire and the magnetoresistant material to be coated thereon is preferably formed as small as possible.
  • the particle size of the magnetoresistant material is preferably small.
  • the magnetoresistant material containing metal components is coated onto the outer surface of the insulating layer, it is difficult to maintain the insulation capacity ofthe enameled wire due to breakdown ofthe insulating varnish layer. The breakdown of the insulating varnish layer happens because an electricity flowing in a conductor tends to flow toward the parts coated with the metal components.
  • a first layer or a second layer is formed to identify a sufficient insulation breakdown voltage and then the magnetoresistant material is coated.
  • Oxide-based or nitride-based compounds having no conductivity, or magnetoresistant material of which the powder particles are insulated does not affect their conductivity, and thus it is reasonable to say that they can be dispersed into everywhere ofthe insulation layer.
  • the magnetoresistant material is mixed with a varnish to prepare a magnetoresistant varnish.
  • the magnetoresistant material is preferably present in an amount of 0.3-30% by weight based on the solid content. When the magnetoresistant material is present in an amount of less than 0.3 % by weight, it is difficult to obtain sufficient magnetoresistance such as magneto motive force, coercive forces, magnetic flux density and magnetic permeability.
  • the magnetoresistant material exceeds 0.3 % by weight, it cannot be dispersed into the varnish or the appearance of a magnetoresistant enameled wire to be manufactured is not smooth. In addition, agglomeration and expansion can be caused. Furthermore, the intensity of magnetic field is not increased in proportional to the added amounts.
  • the magnetoresistant material is mixed with a varnish, and then the mixture is preferably coated onto the outer surface of a conductive core wire.
  • the varnish is a common one for an enameled wire.
  • the magnetoresistant material ofthe present invention is contained in an insulating varnish or a self-bonding insulating varnish.
  • the insulating varnish containing the magnetoresistant material of the present invention is coated onto the conductive core wire to form an insulating varnish layer, and the self-bonding insulating varnish containing the magnetoresistant material of the present invention forms a magnetoresistant self-bonding insulating varnish layer.
  • the insulating varnish commonly forms an insulating varnish layer at an outer surface closest to the core wire and the insulating varnish layer plays a role as an insulation layer.
  • the magnetoresistant self-bonding insulating varnish is coated onto the outer part of the insulation layer to form a self-bonding insulation layer, which and plays a role as a self-bonding layer and an insulation layer. If the magnetoresistant material ofthe present invention is contained either in the insulating varnish layer formed at the outer surface of a conductive wire, or in the self-bonding insulating varnish layer, sufficient magnetoresistance effects can be obtained. Further, the magnetoresistant material can be contained both in the insulating varnish layer and in the self-bonding insulating varnish layer.
  • the magnetoresistant varnish layer containing the magnetoresistant material is formed at the outer surface of the conductive core wire, which is a conductor of the enameled wire according to the present invention.
  • the magnetoresistant material can be contained in the self-bonding varnish layer formed at the outer surface of the magnetoresistant varnish layer, or in a second or third insulating varnish layer. Of course, there is no problem in maintaining their insulation capacity.
  • the enameled wire and the coil of the present invention can be used at varying voltages ranging from high voltages to low low voltages.
  • the insulating varnish containing the magnetoresistant material of the present invention is prepared by adding a dispersing agent and a magnetoresistant material to an insulating varnish, and stirring the mixture.
  • the preferred dispersing agent is preferably at least one dispersing agent selected from the group consisting of general oil-based dispersing agents, polyethylene polymeric protective colloid-based dispersing agents and liigher fatty acid-based dispersing agents.
  • the amount of the dispersing agent used is preferably within the range of 0.5-3.0 parts by weight, based on 100 parts of the insulation material containing the magnetoresistant material.
  • the polyurethane varnishes for an enameled wire of ii) above comprise a polyisocyanate containing isocyanate groups (-NCO) and a polyester-based polyol containing hydroxyl groups (-OH) as main components.
  • a blocked polyisocyanate is used to react the isocyanate groups with the hydroxyl groups by heating.
  • the blocked polyisocyanate is stable in the form of a 1 -liquid at room temperature.
  • the polyurethane varnishes for an enameled wire are mainly used in general transformers of household appliances, etc. Index of heat resistance of the polyurethane varnishes for an enameled wire is E-F type (heat resistance temperature: 120-155 ° C).
  • the polyvinylformal (PVE) varnishes for an enameled wire of iii) above are prepared by adding epoxy, melamine and the like to a polyvinylformal resin among polyvinylacetal resins. Since the polyvinylformal (PVE) varnishes for an enameled wire have excellent wear resistance and coolant resistance, they are mainly used in refrigerators, air-conditioners and motors for closed compressors requiring coolants. Further, incorporation of urethane groups to a basic formal copper wire enamel or other modifications are possible. Index of heat resistance of the polyvinylformal varnishes for an enameled wire is E-B type (heat resistance temperature: 120-130 ° C).
  • the self-bonding insulating varnish usable in the present invention includes: i) polyvinylbutyral-based self-bonding varnishes; ii) phenoxy-based self-bonding varnishes; iii) polyamide-based self-bonding varnishes; iv) epoxy-based self-bonding varnishes, and the like.
  • the phenoxy-based self-bonding varnishes of ii) above are prepared by using a thermoplastic phenoxy resin selected from epoxy resins.
  • the phenoxy-based self-bonding varnishes are suitable in solvent elution, electricity applying manner, heating manner.
  • the magnetoresistant enameled wire ofthe present invention is manufactured by coating the magnetoresistant varnish containing the magnetoresistant material onto the outer part of a conductive core wire, followed by softening to form a magnetoresistant varnish layer thereon.
  • the magnetoresistant insulating varnish layer is formed by first applying an insulating varnish to the outer part of a conductor of a conductive core wire containing the magnetoresistant material, followed by softening. If necessary, a second or third insulating varnish is formed by coating a same or different resin optionally containing the magnetoresistant material, followed by softening.
  • an insulation layer optionally containing a magnetoresistant material in the magnetoresistant varnish layer can be alternatively coated and softened.
  • coating and softening can be repeatedly carried out.
  • the repeated coating and softening is because the repeatedly coated enameled wire is more excellent in terms of insulation capacity than an enameled wire formed at one time.
  • Coating of the magnetoresistant varnish, the self-bonding insulating varnish or the self-bonding magnetoresistant varnish onto a conductive core wire is performed by a common process such as a roll coating or impregnation.
  • the softening process is preferably performed in a softening furnace.
  • the temperature ofthe softening furnace is appropriately controlled depending on softening degree of the respective varnishes or curing temperature, and preferably within the range of 400-700 ° C .
  • Comparative Example 2 Preparation of general polyvinylformal-based insulating varnish
  • the viscosity of the varnish thus prepared was 3 ⁇ 0.5 poise at 25 ° C, and the solid content was 35 ⁇
  • the general polyvinylformal-based insulating varnish thus prepared was coated onto a copper conductor wire (diameter: 1mm) by a roll coating manner, softened in a softening furnace, and then dried in a drying furnace.
  • the length of the softening furnace was 4M, and the temperature of the softening furnace was maintained at 460 ° C .
  • the flux in the softening furnace and drying furnace was 35 m/min.
  • the length of the drying furnace was 3.4M, and the inlet and outlet temperatures of the drying furnace were maintained at 460 ° C and 540 °C , respectively.
  • the thickness of the varnish layer of the enameled wire thus manufactured was measured to be 0.017mm using an outside micrometer. Other mechanical properties of the enameled wire were measured. The results are shown in Table 4 below.
  • a magnetoresistant enameled wire was manufactured in the same manner as in Comparative Example 2, except that the polyvinylformal-based magnetically soft varnish was coated instead ofthe general polyvinylformal-based insulating varnish.
  • meta-cresol 40.00 parts by weight of meta-cresol (meta content: 55 parts by weight or more),
  • the flux in the softening furnace and drying furnace was 50 m/min.
  • the length of the drying furnace was 3.4M, and the inlet and outlet temperatures of the drying furnace were maintained at 460 ° C and 540 ° C , respectively.
  • the thickness of an insulating varnish layer in the enameled wire thus manufactured was measured to be 0.019mm using an outside micrometer. Other mechanical properties of the enameled wire were measured. The results are shown in
  • a magnetically soft enameled wire was manufactured in the same manner as in Comparative Example 3, except that the polyurethane-based magnetically soft varnish was coated instead ofthe general polyurethane-based insulating varnish.
  • the thickness of the varnish layer of the enameled wire thus manufactured was measured to be 0.019mm using an outside micrometer. Other mechanical properties of the enameled wire were measured. The results are shown in Table 5 below.
  • Example 3 (KS C3006)- Specification general polyurethane- polyurethane-based insulating layer based insulating magnetically soft varnish layer varnish layer visual appearance good good smooth surface examination insulating layer outside
  • the general polyesterimide-based insulating varnish thus prepared was coated onto a copper conductor wire (diameter: 1.0mm) by a roll coating manner, softened in a softening furnace, and then dried in a drying furnace.
  • the length of the softening furnace was 4M, and the temperature of the softening furnace was maintained at
  • a magnetoresistant enameled wire was manufactured in the same manner as in Comparative Example 4, except that the polyesterimide-based magnetically soft varnish was coated instead ofthe general polyesterimide-based insulating varnish.
  • the thickness of the varnish layer of the enameled wire thus manufactured was measured to be 0.019mm using an outside micrometer. Other mechanical properties of the enameled wire were measured. The results are shown in Table 6 below.
  • the polybutyral-based self-bonding insulating varnish thus prepared was coated onto the general polyester-based insulating varnish-coated enameled wire manufactured in Comparative Example 1 by a roll coating manner, softened in a softening furnace, and then dried in a drying furnace.
  • the length of the softening furnace was 4M, and the temperature of the softening furnace was maintained at 460 ° C .
  • the flux in the softening furnace and drying furnace was 35 m/min.
  • the length of the drying furnace was 3.4M, and the inlet and outlet temperatures ofthe drying furnace were maintained at 460 ° C and 540 °C, respectively.
  • the phenoxy-based self-bonding insulating varnish thus prepared was coated onto the general polyvinylformal-based insulating varnish-coated enameled wire manufactured in Comparative Example 2 by a roll coating manner, softened in a softening furnace, and then dried in a drying furnace.
  • the length of the softening furnace was 4M, and the temperature of the softening furnace was maintained at 460 ° C .
  • the flux in the softening furnace and drying furnace was 35 m/min.
  • the length of the drying furnace was 3.4M, and the inlet and outlet temperatures of the drying furnace were maintained at 460 ° C and 540 ° C , respectively.
  • Example 11 Manufacture of self-bonding magnetically soft enameled wire comprising polyvinylformal-based magnetically soft varnish layer and phenoxy-based self-bonding magnetically soft varnish layer
  • the phenoxy-based self-bonding magnetically soft varnish prepared in Example 10 was coated onto the polyvinylformal-based magnetically soft varnish-coated enameled wire manufactured in Example 2 by a roll coating manner, softened in a softening furnace, and then dried in a drying furnace.
  • the length of the softening furnace was 4M, and the temperature of the softening furnace was maintained at 460 °C .
  • the flux in the softening furnace and drying furnace was 35 m/min.
  • the length of the drying furnace was 3.4M, and the inlet and outlet temperatures of the drying furnace were maintained at 460 °C and 540 ° C , respectively.
  • An insulation layer was formed on a copper wire (diameter: 0.4mm) as a first layer using the polyester varnish for a enameled wire, and then a second layer was formed thereon in the thickness of 0.007mm using the same varnish to manufacture an enameled wire.
  • the mechanical properties of the enameled wire are shown in Table 13 below.
  • the direct current motor fabricated by stirring and dispersing the high magnetic permeability magnetically soft materials as magnetoresistant materials in the varnishes for enameled wire, and coating the dispersion had significant differences, compared to common motors, in terms of total rotation time, heating value, outer temperature.
  • Example 21 the two motors were fixed using a flexible rubber band and a tape. During slowly raising rated voltage to 90N, the voltages values were measured. The results are shown in Table 15.
  • the coil manufactured by the magnetoresistant enameled wire of the present invention can have magnetically resistance at room temperature.
  • power loss due to self-resistance and load of transmission and distribution cables can be reduced.
  • the resistance loss contributes to extending shortened life span of power lines resulting from degradation acceleration due to operational conditions.

Abstract

L'invention concerne un fil émaillé à résistance magnétique enrobé d'une matière qui présente une conductivité améliorée et une résistance réduite du conducteur, ledit fil ayant des propriétés similaires à la magnétorésistance anisotrope de matériaux magnétiques sous forme d'enroulement. Ladite matière a également des propriétés similaires à la magnétorésistance, avec une densité de flux magnétique élevée. La présente invention porte également sur un procédé pour fabriquer ce fil émaillé à résistance magnétique, sur un enroulement à résistance magnétique constitué par ce fil, et sur un procédé pour fabriquer cet enroulement à résistance magnétique.
EP03715831A 2002-04-12 2003-04-12 Fil emaille a resistance magnetique et procede de fabrication associe, enroulement constitue de ce fil et procede de fabrication associe Withdrawn EP1500113A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
KR20020019934 2002-04-12
KR2002019934 2002-04-12
PCT/KR2003/000744 WO2003088282A1 (fr) 2002-04-12 2003-04-12 Fil emaille a resistance magnetique et procede de fabrication associe, enroulement constitue de ce fil et procede de fabrication associe
KR2003023238 2003-04-12
KR1020030023238A KR100585993B1 (ko) 2002-04-12 2003-04-12 자기저항 에나멜선 및 그의 제조방법과 이를 이용한 코일및 그의 제조방법

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Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6743273B2 (en) * 2000-09-05 2004-06-01 Donaldson Company, Inc. Polymer, polymer microfiber, polymer nanofiber and applications including filter structures
US20100201469A1 (en) * 2006-08-09 2010-08-12 General Electric Company Soft magnetic material and systems therewith
CZ306750B6 (cs) * 2006-10-27 2017-06-14 Austin Detonator S.R.O. Detonační trubice průmyslové neelektrické rozbušky pro zlepšení separovatelnosti od zpracovávané rubaniny
CZ307210B6 (cs) * 2006-10-27 2018-03-28 Austin Detonator S.R.O. Izolace, obklopující vodič elektrického proudu, pro zlepšení separovatelnosti od zpracovávané rubaniny
US20100175555A1 (en) * 2008-09-12 2010-07-15 Ismael Ferrer Polyamide Fine Fibers
DE102009003512A1 (de) * 2009-02-20 2010-09-02 Elantas Gmbh Umweltfreundlicher lötbarer Drahtlack
CN101834034A (zh) * 2010-04-21 2010-09-15 江苏宝杰隆电磁线有限公司 铌钛镍合金改性缩醛树脂超导体漆包扁线的生产方法
CN102142298A (zh) * 2010-11-12 2011-08-03 吴江市神州双金属线缆有限公司 一种大型变压器用的漆包线
WO2012136754A1 (fr) * 2011-04-07 2012-10-11 Abb Research Ltd Câble et dispositif électromagnétique comprenant ce dernier
CN103503082A (zh) * 2012-05-01 2014-01-08 住友电气工业株式会社 多芯线缆
CN103871707B (zh) * 2014-03-04 2016-04-13 山西雷麦电子科技有限公司 一种钴铁基巨磁阻抗软磁丝材料及制备方法
CN105097115A (zh) * 2015-07-13 2015-11-25 江苏亨通线缆科技有限公司 高强度铜合金用户引入电缆
WO2018200003A1 (fr) * 2017-04-28 2018-11-01 Halliburton Energy Services, Inc. Câble métallique à large bande
FI20175553A1 (en) 2017-06-14 2018-12-15 Spindeco Tech Oy Additional unit or cable that can be connected to a power supply or signal line for an electrical appliance
JP7109938B2 (ja) 2018-03-02 2022-08-01 東京特殊電線株式会社 高周波コイル用線材及び絶縁電線並びに高周波コイル用線材の製造方法
US10591316B2 (en) * 2018-03-30 2020-03-17 Mitutoyo Corporation Transmitter and receiver configuration for inductive position encoder
CN109192354B (zh) * 2018-09-27 2020-10-27 宁波鑫健新材料科技有限公司 一种高导电性能的漆包线及制备方法
CN110229992B (zh) * 2019-04-24 2020-10-30 武汉钢铁有限公司 一种钛微合金化低成本q355b钢板的冶炼生产方法
CN111024469A (zh) * 2019-12-25 2020-04-17 珠海格力电工有限公司 一种测试漆包线偏心度的方法
CN112846196B (zh) * 2020-12-31 2022-08-26 莱芜职业技术学院 一种制备片状铁硅铬软磁复合材料的制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013043A (en) * 1962-06-25 1965-12-15 Albert Edward Newman Improved electrical conductors for high frequency currents
JPS6441202A (en) * 1987-08-06 1989-02-13 Mitsubishi Petrochemical Co Cable shielding bead
US5171937A (en) * 1991-07-22 1992-12-15 Champlain Cable Corporation Metal-coated shielding materials and articles fabricated therefrom
EP0528611A1 (fr) * 1991-08-21 1993-02-24 Champlain Cable Corporation Matériaux de blindage en polymère conducteur et articles fabriqués à partir de ceux-ci
JPH1153956A (ja) * 1997-08-07 1999-02-26 Sumitomo Wiring Syst Ltd Ｅｍｉ抑制ケーブル

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56167302A (en) * 1980-05-27 1981-12-23 Nippon Steel Corp Magnetic metal wire for iron core
EP0713732B1 (fr) * 1992-04-16 1998-12-23 Sumitomo Wiring Systems, Ltd. Fil électrique revêtu de vernis et méthode de sa production
JP3811571B2 (ja) * 1998-04-22 2006-08-23 東都化成株式会社 熱可塑性ポリヒドロキシポリエーテル樹脂及びそれから成形した絶縁性フィルム
EP1031972B1 (fr) * 1999-02-24 2004-12-22 Sharp Kabushiki Kaisha Support d'enregistrement d'informations optiques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013043A (en) * 1962-06-25 1965-12-15 Albert Edward Newman Improved electrical conductors for high frequency currents
JPS6441202A (en) * 1987-08-06 1989-02-13 Mitsubishi Petrochemical Co Cable shielding bead
US5171937A (en) * 1991-07-22 1992-12-15 Champlain Cable Corporation Metal-coated shielding materials and articles fabricated therefrom
EP0528611A1 (fr) * 1991-08-21 1993-02-24 Champlain Cable Corporation Matériaux de blindage en polymère conducteur et articles fabriqués à partir de ceux-ci
JPH1153956A (ja) * 1997-08-07 1999-02-26 Sumitomo Wiring Syst Ltd Ｅｍｉ抑制ケーブル

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO03088282A1 *

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US20060165983A1 (en) 2006-07-27
EP1500113A4 (fr) 2008-07-30
AU2003221138A1 (en) 2003-10-27
JP2005522840A (ja) 2005-07-28

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