公开(公告)号：US20220165451A1

公开(公告)日：2022-05-26

申请号：US17669175

申请日：2022-02-10

Applicant: Essex Furukawa Magnet Wire Japan Co., Ltd.

Inventor： Keiichi TOMIZAWA ,  Akira TACHIBANA ,  Daisuke MUTO

IPC: H01B7/02 ,  H01B1/02 ,  H01B3/30 ,  H01B3/36 ,  H01F5/06

Abstract: Provided is an electrical conducting wire in which eddy current loss is effectively suppressed, mechanical strength is excellent, and electrical conductivity is also excellent while aluminum strands that are not coated with insulating resin are used as strands constituting a split conductor.
An electrical conducting wire, including: a split conductor composed of multiple aluminum strands arranged in parallel to each other or multiple aluminum strands twisted into a helix, wherein each of the strands contains 0.01 to 0.4 mass % of Fe, 0.3 to 0.5 mass % of Cu, 0.04 to 0.3 mass % of Mg, 0.02 to 0.3 mass % of Si, and 0.001 to 0.01 mass % of Ti and V in total, with the balance being Al and inevitable impurities; and wherein each of the strands is not coated with an insulating resin.

公开(公告)号：US11232885B2

公开(公告)日：2022-01-25

申请号：US15963667

申请日：2018-04-26

Applicant: ESSEX FURUKAWA MAGNET WIRE JAPAN CO., LTD.

Inventor： Kenji Fujimori ,  Makoto Oya

IPC: H01B5/02 ,  H01B7/02 ,  H01F5/06 ,  H01F27/28 ,  H01B3/30 ,  H02K3/34 ,  H01B13/06 ,  H02K3/30 ,  H01B13/10 ,  H01B13/14 ,  H01F27/32

Abstract: An insulated wire having at least one layer of coating of the wire, comprising a thermosetting resin layer, at the outer periphery of a conductor, wherein the thermosetting resin layer is comprised of thermosetting resin layers having a laminated structure formed by coating and baking a thermosetting resin varnish; and wherein, in said laminated structure, an innermost layer having contact with the conductor comprises a thermosetting resin having an imide bond and is a layer having an average thickness of more than 5 μm and 10 μm or less; a method of producing the insulated wire; a coil; a rotating electrical machine; and an electrical or electronic equipment.

公开(公告)号：US20210343446A1

公开(公告)日：2021-11-04

申请号：US17370134

申请日：2021-07-08

Applicant: Essex Furukawa Magnet Wire Japan Co., Ltd.

Inventor： Daisuke MUTO ,  Keiichi TOMIZAWA ,  Hideo FUKUDA

IPC: H01B3/30 ,  H02K3/30 ,  H02K3/40

Abstract: 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 (ε0) of an outermost layer of the insulating film at 0.2 atm. ε≤3.0 and ε0/ε≥1.2.

公开(公告)号：US11450450B2

公开(公告)日：2022-09-20

申请号：US17034237

申请日：2020-09-28

Applicant: ESSEX FURUKAWA MAGNET WIRE JAPAN CO., LTD.

Inventor： Natsuko Hara ,  Keisuke Ikeda ,  Daisuke Muto

IPC: H01B7/02 ,  H01B3/42 ,  H01B13/06 ,  H01F5/06

Abstract: An insulated wire comprising a conductor and a bubble-containing insulating layer, directly or indirectly coating the outer periphery of the conductor and containing a thermosetting resin, wherein the bubbles in the bubble-containing insulating layer include flattened bubbles whose oblateness in the cross-section perpendicular to the longitudinal direction of the insulated wire (lateral length of the bubble cross-sectional shape/vertical length of the bubble cross-sectional shape) is 1.5 or more and 5.0 or less.

公开(公告)号：US11437163B2

公开(公告)日：2022-09-06

申请号：US17037013

申请日：2020-09-29

Applicant: ESSEX FURUKAWA MAGNET WIRE JAPAN CO., LTD.

Inventor： Natsuko Hara ,  Keiichi Tomizawa ,  Hideo Fukuda

IPC: H01B3/30 ,  C08G73/10 ,  C09D179/08

Abstract: 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 %.

公开(公告)号：US10991483B2

公开(公告)日：2021-04-27

申请号：US15982751

申请日：2018-05-17

Applicant: ESSEX FURUKAWA MAGNET WIRE JAPAN CO., LTD.

Inventor： Keisuke Ikeda ,  Hideo Fukuda

IPC: H01B7/02 ,  H01B7/30 ,  H01B13/00 ,  H01B7/00 ,  H01B13/14 ,  H01B3/42 ,  H01R4/02 ,  H01R4/70

Abstract: An assembled wire, having: an assembled conductor composed of a plurality of conductor strands each having a rectangular cross-section, stacked and arranged each other across an interlayer insulating layer; an insulating outer layer that coats the assembled conductor including the interlayer insulating layer; and an adhesion layer composed of a thermoplastic resin having a thickness of 3 μm or more and 10 μm or less between the assembled conductor and the insulating outer layer.