公开(公告)号：US12288631B2

公开(公告)日：2025-04-29

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：US11217364B2

公开(公告)日：2022-01-04

申请号：US16935426

申请日：2020-07-22

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

Inventor： Keiichi Tomizawa ,  Daisuke Muto ,  Satoshi Saito

IPC: H01B7/02 ,  H01F5/06 ,  H01B3/30 ,  H01B3/36 ,  H01B3/44

Abstract: 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° 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.

公开(公告)号：US10978219B2

公开(公告)日：2021-04-13

申请号：US16886453

申请日：2020-05-28

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

Inventor： Keiichi Tomizawa ,  Akira Tachibana ,  Keisuke Ikeda ,  Daisuke Muto ,  Hideo Fukuda

IPC: H01B7/02 ,  H01F5/06 ,  H02K3/30

Abstract: Provided is an assembled wire 10 having a substantially rectangular cross section, and is formed by assembling a plurality of strands 7. Each strand 7 has a conductor portion 11 and a strand insulating layer 13 covering the conductor portion 11. The strand insulating layer 13 preferably contains at least one kind of resin in which 50% weight loss in Tg-DTA occurs at from 300° C. to 500° C. The strand insulating layer 13 contains particles. The particles are particles having volume resistivity of 1×106 Ω·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.

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.