Patents Assigned to Furukawa Magnet Wire Co., Ltd.
  • Publication number: 20160189826
    Abstract: A rectangular wire having: a multilayer conductor member constructed by stacking, in a thickness direction, a rectangular metallic conductor that has a layer of a first thermoplastic resin formed on the outer periphery thereof, the first thermoplastic resin being a non-crystalline resin having no melting point or a crystalline resin having an amide bond; and a layer of a second thermoplastic resin having a melting point of 300° C. or more on the outer periphery of the multilayer conductor member.
    Type: Application
    Filed: March 4, 2016
    Publication date: June 30, 2016
    Applicants: FURUKAWA ELECTRIC CO., LTD., FURUKAWA MAGNET WIRE CO., LTD.
    Inventors: Hideo FUKUDA, Dai FUJIWARA, Tsuneo AOI, Hiroshi KANEIWA, Takefumi KAJI
  • Publication number: 20160055940
    Abstract: An insulated wire having a rectangular shaped cross-section, containing: a conductor having a rectangular shaped cross-section; and an insulating layer coated on the conductor, in which the insulating layer has a foamed layer composed of a thermosetting resin containing bubbles, the cross-section of the insulating layer has a shape composed of a flat portion and a corner portion, and the insulating layer satisfies the relationship represented by the following formula: ?1<3 and (T2/?2)>(T1/?1) wherein T1 [?m] represents a thickness of the flat portion; ?1 represents a relative dielectric constant of the flat portion; T2 [?m] represents a thickness of the corner portion; and ?2 represents a relative dielectric constant of the corner portion, and an electric/electronic equipment, a motor, or a transformer, using the insulated wire.
    Type: Application
    Filed: October 23, 2015
    Publication date: February 25, 2016
    Applicants: FURUKAWA MAGNET WIRE CO., LTD., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Makoto OYA, Daisuke MUTO, Keiichi TOMIZAWA
  • Patent number: 9224523
    Abstract: An inverter surge-resistant insulated wire, having at least one baked enamel layer around the outer periphery of a conductor, and an extrusion-coated resin layer at the outside of the baked enamel layer, wherein a total thickness of the baked enamel layer and the extrusion-coated resin layer is 50 ?m or more, a thickness of the baked enamel layer is 60 ?m or less, and a thickness of the extrusion-coated resin layer is 200 ?m or less, wherein the minimum of tensile elastic modulus of the extrusion-coated resin layer at a range of 25 to 250° C. is 100 MPa or more, wherein a dielectric constant of an insulation layer having a combination of the baked enamel layer and the extrusion-coated resin layer is 3.5 or less at 25° C. and 5.0 or less at 250° C., and wherein a relation between dielectric constant (?1?) of the baked enamel layer at 250° C. and dielectric constant (?2?) of the extrusion-coated resin layer at 250° C. satisfies (?2?/?1?)>1.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: December 29, 2015
    Assignees: FURUKAWA ELECTRIC CO., LTD., FURUKAWA MAGNET WIRE CO., LTD.
    Inventors: Daisuke Muto, Hideo Fukuda, Keiichi Tomizawa, Satoshi Naka
  • Patent number: 9196401
    Abstract: An insulated wire, containing: an insulating film made from a thermosetting resin disposed on a conductor directly or via an insulating layer interposed therebetween, in which the insulating film made from a thermosetting resin is a layer containing bubbles prepared by baking a varnish of thermosetting resin, and a layer containing no bubbles is formed as an upper or lower layer of the layer containing bubbles.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: November 24, 2015
    Assignees: FURUKAWA ELECTRIC CO., LTD., FURUKAWA MAGNET WIRE CO., LTD.
    Inventors: Makoto Oya, Daisuke Muto, Makoto Onodera, Keiichi Tomizawa
  • Publication number: 20150325333
    Abstract: An enamel resin-insulating laminate that has a foamed region including cells and a non-foamed region including no cells on at least one surface of the foamed region, and is shaped into a flat plate form or cylindrical form, wherein the foamed region is configured such that a non-cell layer including no cells has cell layers formed of closed cells on both surface sides of the non-cell layer, a thickness of the non-cell layer is larger than a thickness of a partition wall among the closed cells, and 5 to 60% of a thickness of the foamed region, and at least the cell layer in the foamed region is formed of a thermosetting resin; an inverter surge-resistant insulated wire having a conductor and the enamel resin-insulating laminate; and electric/electronic equipment.
    Type: Application
    Filed: July 22, 2015
    Publication date: November 12, 2015
    Applicants: FURUKAWA MAGNET WIRE CO., LTD., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Daisuke MUTO, Makoto OYA, Keiichi TOMIZAWA
  • Publication number: 20150310959
    Abstract: An insulated wire having a conductor, a foamed insulating layer containing a thermosetting resin having cells, coated directly or indirectly onto the outer periphery of the conductor and an outer insulating layer containing a thermoplastic resin having a melting point of 240° C. or higher when the thermoplastic resin is a crystalline resin or a thermoplastic resin having a glass transition temperature of 240° C. or higher when the thermoplastic resin is a non-crystalline resin; electrical equipment using the insulated wire; and a method of producing the insulated wire, containing a step of forming a foamed insulating layer by applying a varnish for forming the foamed insulating layer on the outer periphery of a conductor, by generating foams during baking and a step of forming an outer insulating layer by extrusion-molding a thermoplastic resin composition for forming the outer insulating layer on the outer periphery of the foamed insulating layer.
    Type: Application
    Filed: April 30, 2015
    Publication date: October 29, 2015
    Applicants: FURUKAWA ELECTRIC CO., LTD., FURUKAWA MAGNET WIRE CO., LTD.
    Inventors: Makoto OYA, Makoto ONODERA, Keiichi TOMIZAWA
  • Publication number: 20150262732
    Abstract: An insulated wire, containing a conductor, an insulating layer that directly or indirectly coats the outer periphery of the conductor and includes a foaming thermosetting resin, and an outer non-foamed insulating layer that directly or indirectly coats the outer periphery of the insulating layer, wherein the insulating layer has a thickness deformation ratio of 15% or more and 50% or less upon applying a pressure of 1 MPa at 25° C., wherein the outer non-foamed insulating layer has pencil hardness of 4H or more, and wherein a ratio of thickness of the insulating layer to the outer non-foamed insulating layer is 20:80 to 80:20; and a motor, wherein the insulated wire is wound into a stator slot in a state in which pressure is applied in a direction for reducing the outer diameter of the insulated wire and a thickness of the insulating layer is reduced.
    Type: Application
    Filed: June 1, 2015
    Publication date: September 17, 2015
    Applicants: FURUKAWA MAGNET WIRE CO., LTD., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Makoto OYA, Daisuke MUTO, Keiichi TOMIZAWA
  • Publication number: 20150235736
    Abstract: An insulated wire having a conductor, and a multilayer insulating layer composed of two or more layers coating the conductor, wherein the innermost insulating layer of the multilayer insulating layer is an insulating layer formed of a crystalline thermoplastic resin having a storage elastic modulus of 10 MPa or more at 300° C. and outer insulating layer(s) other than the innermost insulating layer include(s) an insulating layer formed of a crystalline thermoplastic resin having a melting point of 260° C. or higher and a storage elastic modulus of 1,000 MPa or more at 25° C., and adjacent insulating layers have a relationship such that the storage elastic modulus at 25° C. of the thermoplastic resin of the outer insulating layer is equal to or smaller than the inner insulating layer; and electric/electronic equipment formed using the insulated wire as a winding and/or lead wire of a transformer that is incorporated into the electric/electronic equipment.
    Type: Application
    Filed: April 16, 2015
    Publication date: August 20, 2015
    Applicants: FURUKAWA MAGNET WIRE CO., LTD., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Keisuke IKEDA, Hideo FUKUDA, Daisuke MUTO, Keiichi TOMIZAWA
  • Publication number: 20150027748
    Abstract: An inverter surge-resistant insulated wire, having at least one baked enamel layer around the outer periphery of a conductor having a rectangular cross-section, at least one extrusion-coated resin layer around the outer side thereof, and an adhesive layer having a thickness of 2 to 20 ?m between the baked enamel layer and the extrusion-coated resin layer, wherein each of the at least one extrusion-coated resin layer on the adhesive layer is formed by the same resin, a cross-sectional shape of the baked enamel layer and the extrusion-coated resin layer in the cross-section of the inverter surge-resistant insulated wire is rectangular, and in the cross-sectional shape formed by the baked enamel layer and the extrusion-coated resin layer surrounding the conductor in a cross-sectional view, at least a pair of two sides of two pairs of two sides opposing at the upper side and the downside or at the right side and the left side with respect to the conductor each meet the conditions that a total thickness of the bak
    Type: Application
    Filed: October 6, 2014
    Publication date: January 29, 2015
    Applicants: FURUKAWA ELECTRIC CO., LTD., FURUKAWA MAGNET WIRE CO., LTD.
    Inventors: Hideo FUKUDA, Daisuke MUTO, Dai FUJIWARA, Keiichi TOMIZAWA, Tsuneo AOI
  • Publication number: 20150021067
    Abstract: An inverter surge-resistant insulated wire, having at least one baked enamel layer around the outer periphery of a conductor, and an extrusion-coated resin layer at the outside of the baked enamel layer, wherein a total thickness of the baked enamel layer and the extrusion-coated resin layer is 50 ?m or more, a thickness of the baked enamel layer is 60 ?m or less, and a thickness of the extrusion-coated resin layer is 200 ?m or less, wherein the minimum of tensile elastic modulus of the extrusion-coated resin layer at a range of 25 to 250° C. is 100 MPa or more, wherein a dielectric constant of an insulation layer having a combination of the baked enamel layer and the extrusion-coated resin layer is 3.5 or less at 25° C. and 5.0 or less at 250° C., and wherein a relation between dielectric constant (?1?) of the baked enamel layer at 250° C. and dielectric constant (?2?) of the extrusion-coated resin layer at 250° C. satisfies (?2?/?1?)>1.
    Type: Application
    Filed: September 29, 2014
    Publication date: January 22, 2015
    Applicants: FURUKAWA MAGNET WIRE CO., LTD., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Daisuke MUTO, Hideo FUKUDA, Keiichi TOMIZAWA, Satoshi NAKA
  • Publication number: 20140300439
    Abstract: A wire rod for inductor used for a coil of an inductor includes an electric conductor and a magnetic layer made of Fe that is provided on a surface of the electric conductor. The magnetic layer has a thickness of greater than 0 ?m and less than or equal to 3.0 ?m.
    Type: Application
    Filed: April 3, 2014
    Publication date: October 9, 2014
    Applicants: Furukawa Magnet Wire Co., Ltd., Furukawa Electric Co., Ltd.
    Inventors: Kengo TANAKA, Noriyoshi Fushimi, Fumihiko Abe
  • Patent number: 8847075
    Abstract: An insulated wire having: a conductor, a baked enamel layer containing at least a polyamide-imide provided on the outer periphery of the conductor directly or through an insulated layer, and at least one extrusion-coated resin layer provided on the outer side of the baked enamel layer, wherein the baked enamel layer has at least one functional group selected from the group consisting of a carboxyl group, an ester group, an ether group and a hydroxyl group on the outer surface thereof, and adheres to the extrusion-coated resin layer.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: September 30, 2014
    Assignees: Furukawa Electric Co., Ltd., Furukawa Magnet Wire Co., Ltd., Denso Corporation
    Inventors: Keisuke Ikeda, Makoto Oya, Yoshihisa Kano, Takashi Aoki, Tatsunori Makishima, Akio Sugiura, Hiromitsu Asai, Shinichi Matsubara
  • Publication number: 20140225704
    Abstract: The present invention provides a multilayer insulated electric wire to achieve a good balance between heat resistance and voltage resistance characteristics, then satisfy IEC standards Pub. 61558 which require strict voltage regulation, and electric or electronic equipment such as transformer formed by winding the insulated electric wire. The present invention is a multilayer insulated electric wire including two or more insulating layers, wherein at least one layer of the insulating layers other than the outermost layer is an insulating layer containing a resin having a melting point of 200° C. or higher and a tensile modulus of elasticity at 25° C. of 1000 MPa or less, and the multilayer insulated electric wire is coated with a resin material (also simply called a resin) having a tensile modulus of elasticity at 25° C. of 1000 MPa or more as the outermost layer, and electric or electronic equipment such as transformer formed by winding the insulated electric wire.
    Type: Application
    Filed: April 17, 2014
    Publication date: August 14, 2014
    Applicants: FURUKAWA ELECTRIC CO., LTD., FURUKAWA MAGNET WIRE CO., LTD.
    Inventors: Keisuke IKEDA, Makoto OYA, Daisuke MUTO, Keiichi TOMIZAWA
  • Publication number: 20140203899
    Abstract: An electromagnet includes a core and a wire wound on the core. The wire includes an electric conductor and a magnetic layer provided on a surface of the electric conductor.
    Type: Application
    Filed: March 27, 2014
    Publication date: July 24, 2014
    Applicants: Furukawa Magnet Wire Co., Ltd., Furukawa Electric Co., Ltd.
    Inventors: Kengo TANAKA, Noriyoshi FUSHIMI
  • Publication number: 20130330554
    Abstract: Insulating paint, containing a resin that can form an insulating film by application and baking, and a reducing agent having a boiling point of 160° C. or higher.
    Type: Application
    Filed: August 15, 2013
    Publication date: December 12, 2013
    Applicants: Furukawa Magnet Wire Co., Ltd., Furukawa Electric Co., Ltd.
    Inventors: Makoto OYA, Makoto ONODERA, Keisuke IKEDA, Keiichi TOMIZAWA