# US 10,319,491 B2 · Rectangular wire, and method of producing the same and electrical equipment using the same

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- Number: US 10,319,491 B2
- Document ID: US10319491B2
- Status: Granted
- Kind: B2
- Application number: 15/061,134
- Filed: 2016-03-04
- Published: 2016-06-30
- Granted: 2019-06-11
- Earliest claimed: 2013-09-06
- Assignees: Furukawa Electric Co., Ltd.; Furukawa Magnet Wire Co., Ltd.
- Applicants: Furukawa Electric Co., Ltd.; Furukawa Magnet Wire Co., Ltd.
- Inventors: Hideo Fukuda; Dai Fujiwara; Tsuneo Aoi; Hiroshi Kaneiwa; Yuki Amano
- Web page: https://patentgrep.com/patent/US10319491B2

## CPC

- H01B 3/308: {Wires with resins}
- H01B 3/302: {Polyurethanes or polythiourethanes; Polyurea or polythiourea}
- H01B 3/303: {Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302}
- H01B 3/307: {Other macromolecular compounds}
- H01B 7/0009: {Details relating to the conductive cores}
- H01B 13/06: Insulating conductors or cables (H01B13/32 takes precedence)
- H01B 13/065: {Insulating conductors with lacquers or enamels}
- H01F 5/06: Insulation of windings
- H01F 27/2823: {Wires (H01F27/2866 takes precedence)}
- H02K 3/30: Windings characterised by the insulating material
- H02K 15/04: of windings prior to their mounting into the machines (insulating windings H02K15/10, H02K15/12)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

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

## Claims

### Claim 1

A rectangular wire having: a stacked multilayer conductor member comprising, 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° C. or more to 200° C. or less and the thermosetting resin is a thermosetting polyurethane-based resin; and a layer of a thermoplastic resin having a melting point of 300° C. or more to 450° C. or less only on the outer periphery of the multilayer conductor member, wherein the thickness of the thermoplastic resin layer is 40 μm to 200 μm, wherein the conductor has a width dimension perpendicular to a stacking direction and misalignment of the width dimension between one conductor to another adjacent conductor in the stacking direction is less than one-third of the width dimension.

### Claim 2 (depends on 1)

The rectangular wire as claimed in claim 1, wherein the thermoplastic resin is a resin selected from the group consisting of a polyaryletherketone, a modified polyetheretherketone, and a thermoplastic polyimide.

### Claim 3 (depends on 1)

The rectangular wire as claimed in claim 1, wherein the total number of stacking the rectangular metallic conductors in the thickness direction is 2 or more and 6 or less.

### Claim 4 (depends on 1)

The rectangular wire as claimed in claim 1, wherein a thickness of a baked coat layer comprising the thermosetting resin is 0.5 μm or more and 50 μm or less.

### Claim 5

A method of producing a rectangular wire comprising: a step of forming a multilayer conductor member by stacking, in a thickness direction, a rectangular metallic conductor having formed by bake-coating a layer of a thermosetting resin on the outer periphery thereof, the thermosetting resin having a glass transition temperature of 100° C. or more to 200° C. or less and the thermosetting resin is a thermosetting polyurethane-based resin; and a step of coating a layer of a thermoplastic resin having a melting point of 300° C. or more to 450° C. or less only on the outer periphery of the multilayer conductor member, wherein the conductor has a width dimension perpendicular to a stacking direction and misalignment of the width dimension between one conductor to another adjacent conductor in the stacking direction is less than one-third of the width dimension.

### Claim 6

An electrical equipment comprising a rectangular wire having: a stacked multilayer conductor member comprising, in a thickness direction, a rectangular metallic conductor having a layer of a thermosetting resin formed on the outer periphery thereof, the thermosetting resin having a glass transition temperature of 100° C. or more to 200° C. or less and the thermosetting resin is a thermosetting polyurethane-based resin; and a layer of a thermoplastic resin having a melting point of 300° C. or more to 450° C. or less only on the outer periphery of the multilayer conductor member, wherein the conductor has a width dimension perpendicular to a stacking direction and misalignment of the width dimension between one conductor to another adjacent conductor in the stacking direction is less than one-third of the width dimension.