The Furukawa Electric Co., Ltd.

Furukawa Magnet Wire Co., Ltd.

Essex Furukawa Magnet Wire Japan Co., Ltd.

Essex Furukawa Magnet Wire Japan Col, Ltd.

Keiichi Tomizawa

Daisuke Muto

Hideo Fukuda

Makoto Oya

Keisuke Ikeda

Makoto Onodera

Tsuneo Aoi

Satoshi Saito

Akira Tachibana

Dai Fujiwara

Ayumi Yamamoto

Ryousuke Obika

Satoshi Naka

Natsuko Hara

An insulated wire including: a conductor; and an insulating film provided on an outer periphery of the conductor, wherein the insulating film satisfies the following relation between a relative permittivity (ε) of the insulating film at 0.2 atm and a relative permittivity (ε) of an outermost layer of the insulating film at 0.2 atm.ε≤3.0 and ε/ε≥1.2.

Insulated wire, coil, and electrical or electronic equipment

An insulated wire, including: a conductor and an insulating film covering the conductor; in which at least one insulating layer constituting the insulating film contains: a thermosetting resin A, and a resin B that is ranked lower than the thermosetting resin A in a tribo-electric series.

An insulated wire, containing a conductor and an insulating film provided in contact with the conductor, in which the insulating film provided in contact with the conductor contains a polyimide resin, and the polyimide resin contains a constituting unit (A) derived from 2,2-bis[4-(4-amininophenoxy)phenyl]propane and a constituting unit (B) derived from 9,9-bis(4-aminophenyl)fluorene as a diamine-derived constituting unit; the polyimide resin has an imide group concentration of 25.0% or less; and the ratio of the content of the constituting unit (B) occupied in the diamine-derived constituting unit in the polyimide resin is 1 to 40 mol %.

An insulated wire containing a thermoplastic resin layer (A) as a covering layer directly or indirectly on a rectangular conductor, in which the insulated wire has at least one protruding part which is continuous in a longitudinal direction of said insulated wire, on a surface of a portion of the thermoplastic resin layer (A), which portion corresponds to at least one side of a cross-section of the insulated wire, said protruding part and a flat part of the surface having the protruding part forms a curved portion with a radius of curvature of 0.01 to 0.75 mm in the cross-section of the insulated wire, and a lateral face of the protruding part has a slope of less than 90&#xb0; to the flat part of the surface having the protruding part in the cross-section of the insulated wire, a coil produced by processing the insulated wire by winding, and an electric/electronic equipment comprising the coil.

Insulated wire, coil, and electric/electronic equipments

An assembled wire has a substantially rectangular cross section, and is formed by assembling a plurality of strands. Each strand has a conductor portion and a strand insulating layer covering the conductor portion. At least a part of the assembled plurality of strands in the longitudinal direction is covered with an outer insulating layer. The strand is formed as follows. First, the strand insulating layer is coated on the outer periphery of the conductor portion. A large number of voids are formed in a resin constituting the strand insulating layer. From this state, the strand is formed, for example, by collapsing the strand insulating layer by heating and pressurizing. At this time, it is possible to uniformly collapse the strand insulating layer by crushing the internal voids. Therefore, the voids in the strand are crushed and flattened in the thickness direction of the strand insulating layer over the entire periphery.

Assembled wire, method of manufacturing assembled wire and segment coil

Provided is an assembled wirehaving a substantially rectangular cross section, and is formed by assembling a plurality of strands. Each strandhas a conductor portionand a strand insulating layercovering the conductor portion. The strand insulating layerpreferably contains at least one kind of resin in which 50% weight loss in Tg-DTA occurs at from 300&#xb0; C. to 500&#xb0; C. The strand insulating layercontains particles. The particles are particles having volume resistivity of 1&#xd7;10&#x3a9;&#xb7;cm or more, and, for example, inorganic substances such as silica, titania, alumina, aluminum nitride, magnesium oxide, silicon nitride, and silicon carbide; and resins such as silicone are applicable.

Assembled wire, segmented conductor, and segment coil and motor using the same

Insulated wire, coil and electrical or electronic equipment

An inverter surge-resistant insulated wire comprising a conductor and 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 on the conductor, 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 10 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.

Enamel resin-insulating laminate, inverter surge-resistant insulated wire using the same and electric/electronic equipment

An insulated wire which comprises an aluminum conductor, having: an adhesion layer formed by directly baking, on the aluminum conductor, varnish containing a carboxy group; an insulation layer as an outer layer of the adhesion layer; and a reinforcement insulation layer as an outer layer of the insulation layer; and a method of producing the same.

Insulated wire and method of producing the same

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&#xb0; 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&#xb0; C. or higher and a storage elastic modulus of 1,000 MPa or more at 25&#xb0; C., and adjacent insulating layers have a relationship such that the storage elastic modulus at 25&#xb0; 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.

Insulated wire and electric or electronic equipment

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&#xb0; C. or higher when the thermoplastic resin is a crystalline resin or a thermoplastic resin having a glass transition temperature of 240&#xb0; 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.

Insulated wire, electrical equipment, and method of producing insulated wire

An insulated wire including a laminated resin-coated insulated wire containing: a thermosetting resin layer (A) directly or via an insulating layer (D) on a conductor having a rectangular cross-section; and at least a thermoplastic resin layer (B) on the outer periphery of the thermosetting resin layer (A), in which the cross-sectional shape of the thermosetting resin layer (A) composed of two pairs of two sides facing each other, and has at least four convex portions each of which has a film thickness in maximum, at least one convex portion of the at least four convex portions is on each of the four sides, or at least two convex portions of the at least four convex portions are at least on each of the two sides facing each other, and in the each side having the convex portion, provided that a minimum film thickness is designated as 'a' pm, and an average of maximum film thicknesses of the convex portions is designated as 'b' pm, the a/b ratio is 0.60 or more and 0.90 or less; a coil, and electric/electronic equipment.

Insulated wire, coil, and electric/electronic equipments as well as method of producing a film delamination-resistant insulated wire

An inverter surge-resistant insulated wire has a baked enamel layer(s) around the outer periphery of a conductor having a rectangular cross-section, an extrusion-coated resin layer(s) around the outer side thereof, and an adhesive layer having a thickness of 2-20 &#x3bc;m between the baked enamel layer and the extrusion-coated resin layer. A cross-sectional shape of the baked enamel layer and the extrusion-coated resin layer in the cross-section of the wire is rectangular. 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 meet the conditions that a total thickness of the baked enamel layer and the extrusion-coated resin layer is 80 &#x3bc;m or more.

Inverter surge-resistant insulated wire and method of producing the same

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:&#x2208;&#x3c;3 and (/&#x2208;)&#x3e;(/&#x2208;)

Insulated wire, and electric/electronic equipments, motor and transformer using the same

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 &#x3bc;m or more, a thickness of the baked enamel layer is 60 &#x3bc;m or less, and a thickness of the extrusion-coated resin layer is 200 &#x3bc;m or less, wherein the minimum of tensile elastic modulus of the extrusion-coated resin layer at a range of 25 to 250&#xb0; 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&#xb0; C. and 5.0 or less at 250&#xb0; C., and wherein a relation between dielectric constant (&#x2208;1') of the baked enamel layer at 250&#xb0; C. and dielectric constant (&#x2208;2&#x2032;) of the extrusion-coated resin layer at 250&#xb0; C. satisfies (&#x2208;2&#x2032;/&#x2208;1&#x2032;)&#x3e;1.

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Tokyo, Japan

Keiichi Tomizawa