The Furukawa Electric Co., Ltd.

Furukawa Magnet Wire Co., Ltd.

Denso Corporation

Dic Corporation

Furukawa Automotive Systems Inc.

Furukawa Electric., Ltd.

Essex Furukawa Magnet Wire Japan Co., Ltd.

Tsuneo Aoi

Hideo Fukuda

Dai Fujiwara

Makoto Oya

Daisuke Muto

Minoru Saito

Makoto Onodera

Keiichi Tomizawa

Hiroshi Kaneiwa

Koji Yamanaka

Isamu Kobayashi

Yukihiro Kawamura

Takashi Tonoike

Shinji Kouda

Keisuke Ikeda

Yasushi Kihara

Isao Tomomatsu

Yuki Amano

Kyutaro Abe

Hiromitsu Asai

Takefumi Kaji

Yohei Ishii

Satoko Yamoto

Ryosuke Obika

Tomoki Kawamura

Hiroshi Orito

Noriyoshi Fushimi

Eigo Tachikawa

Fumiaki Abe

Junichi Ishizuka

Xiao Chuan Zhu

Object: To provide a polyphase AC electric motor whereby partial discharge can be suppressed. Resolution Means: The winding of each phase includes a first partial conductor that is an input side partial conductor; an nth partial conductor connected to a neutral point; and second to n-1th partial conductors. Moreover, a partial conductor disposed within the stator adjacent to the first partial conductor of each phase, or a partial conductor including a coil end portion disposed adjacent to a coil end portion where the first partial conductor extends out of the slot, is any of the following: (1) of the intermediate partial conductors, an ath (where a is a natural number greater than or equal to 2) partial conductor of the same phase or a different phase where voltage takes an extreme value when AC voltage is applied from the inverter; (2) any of an a-3th to a-1th partial conductors of the same phase or a different phase, or any of an a+1th to a+3th partial conductors of the same phase or a different phase connected to the intermediate partial conductor taking the extreme value; (3) any of a n-3th to nth partial conductors of the same phase or a different phase.

Polyphase AC electric motor

An insulated wire in which at least one layer of an insulating material is coated around a conductor, wherein the insulated wire has a part in which relative permittivity is different in a length direction or a circumferential direction in an identical coating layer and a method of producing the same, and a rotating electrical machine and a method of producing the same.

Insulated wire and method of producing the same, and rotating electrical machine and method of producing the same

Insulated wire, coil and electrical or electronic equipment

An insulated wire having an insulating coat layer on the conductor outer peripheral surface having a rectangular cross-sectional shape and also having a long side, a short side, and a corner portion with a curvature radius Rc,

Insulated wire excellent in bending resistance, as well as coil and electric or electronic equipment using the same

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&#xb0; C. or more on the outer periphery of the multilayer conductor member.

Rectangular wire, and method of producing the same and electrical equipment using the same

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 thermosetting resin formed on the outer periphery thereof, the thermosetting resin having a glass transition temperature of 100&#xb0; C. or more and 200&#xb0; C. or less and having a urethane bond; and a layer of a thermoplastic resin having a melting point of 300&#xb0; C. or more on the outer periphery of the multilayer conductor member.

An insulated wire containing: at least one thermosetting resin layer; and at least one thermoplastic resin layer, provided in this order on a conductor having a rectangular cross-section, a curvature radius r of corner portions at both edges of at least one short side of the conductor being 0.6 mm or less, in which thickness tof the corner portion of the thermosetting resin layer and thickness tof the corner portion of the thermoplastic resin layer satisfy a relation expressed by the following Formula 1:2/1&#x3c;1;&#x2003;&#x2003;Formula 1:and a method of producing thereof, a motor coil, and an electric/electronic equipment.

Insulated wire, motor coil, electric/electronic equipment and method of producing insulated wire

A rectangular insulated wire includes a rectangular conductor having a generally rectangular cross section and a plurality of baked-coating resin layers disposed to cover the rectangular conductor. Each of the plurality of baked-coating resin layers is formed of at least one resin selected from a group comprising a polyester-based resin including a trihydric or tetrahydric alcohol constituent, a polyester imide resin, a polyamide-imide resin and a polyimide resin. An adhesion strength between the plurality of baked-coating resin layers is greater than or equal to 5 g/mm and less than or equal to 10 g/mm.

Rectangular insulated wire, coil and electrical and electronic device

A multilayer insulated wire having a polyester-based resin layer formed of a polyester-based resin containing at least a trihydric or higher hydric alcohol constituent on a conductor, and a PEEK resin layer formed of polyether ether ketone or modified polyether ether ketone, directly or by interposing an intermediate layer, on the polyester-based resin layer; a coil formed by winding processing the insulated wire, and electronic/electrical equipment having the coil.

Multilayer insulated wire, coil, and electrical/electronic equipment

A conductor wire crimping portion () has depressions () that are disposed at prescribed intervals in the axial direction and that are linear locking portions. The depressions () are continuously depressed grooves on the inner surface of a crimping portion (). On an upper die (), at a portion corresponding to the conductor wire crimping portion (), a straight portion is formed, and in the front-back direction thereof, tapered portions are formed. More specifically, the upper die () is formed to have an inverted trapezoid shape, a middle portion of which protrudes in the crimping direction. Consequently, at each boundary between the straight portion and the tapered portion, a die angled portion () is formed. At an area corresponding to the straight portion of the upper die (), the depression () is provided, and at an area corresponding to the die angled section (), the depression () is provided.

Terminal, wire harness, terminal and coated conductor wire connection method, and wire harness structure

A rectangular insulated wire includes a rectangular conductor having a generally rectangular cross section, a thermosetting resin layer provided to cover the rectangular conductor, and a plurality of thermoplastic resin layers provided on the thermosetting resin layer. An adhesion strength between the thermosetting resin layer and the thermoplastic resin layer is 50 gf/mm to 100 gf/mm.

Rectangular insulated wire and electric generator coil

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 inverter surge-resistant insulated wire, having an enamel baked layer, an adhesive layer, and an extrusion-coated resin layer, around the outer periphery of a conductor, wherein the sum of the thickness of the enamel baked layer, the extrusion-coated resin layer, and the adhesive layer is 60 &#x3bc;m or more, wherein the thickness of the enamel baked layer is 50 &#x3bc;m or less, and wherein the extrusion-coated resin layer is formed from a polyphenylene sulfide resin composition, which contains a polyphenylene sulfide polymer having a melt viscosity at 300&#xb0; C. of 100 Pa&#xb7;s or more, 2 to 8 mass % of a thermoplastic elastomer, and an antioxidant, and which has a tensile modulus of elasticity at 25&#xb0; C. of 2,500 MPa or more, and a tensile modulus of elasticity at 250&#xb0; C. of 10 MPa or more.

Insulated wire

A multilayer insulated wire, comprising: a conductor; and at least three extruded insulation layers covering the conductor, which extruded insulation layers comprise: (A) an outermost layer composed of an extruded covering layer of a resin whose elongation rate after heat treatment by immersion in a solder at 150&#xb0; C. for two seconds is at least 290% and at least equal to elongation rate before the heat treatment; (B) an innermost layer comprising a resin whose elongation rate after heat treatment by immersion in a solder at 150&#xb0; C. for two seconds is at least 290% and at least equal to elongation rate before the heat treatment; and (C) an insulation layer that is placed between the outermost layer and the innermost layer and that is composed of an extruded covering layer of a crystalline resin with a melting point of at least 280&#xb0; C. or an amorphous resin with a glass transition temperature of at least 200&#xb0; C.; and a transformer having the multilayer insulated wire.

Multilayer insulated wire and transformer using the same

A multilayer insulated electric wire includes a conductor and three or more insulating layers covering the conductor. In the multilayer insulated electric wire, the outermost layer (A) of the insulating layers includes a coating layer formed of a resin composition of a polyamide resin containing copper iodide, and the innermost layer (B) of the insulating layers includes a coating layer formed of a resin composition of 100 parts by mass of a polyester-based resin (B1), all or a part of which is formed of an aliphatic alcohol component bonded with an acid component, and 5 to 40 parts by mass of an ethylene-based copolymer (B2) having side chains of a carboxylic acid or a metal salt of a carboxylic acid.

Growing community of inventors

Tokyo, Japan

Tsuneo Aoi