# US 10,483,818 B2 · Insulated wire, motor coil, and electrical or electronic equipment

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,483,818 B2
- Document ID: US10483818B2
- Status: Granted
- Kind: B2
- Application number: 16/104,457
- Filed: 2018-08-17
- Published: 2018-12-13
- Granted: 2019-11-19
- Earliest claimed: 2016-02-19
- Assignees: Furukawa Electric Co., Ltd.; Furukawa Magnet Wire Co., Ltd.
- Applicants: Furukawa Electric Co., Ltd.; Furukawa Magnet Wire Co., Ltd.
- Inventors: Makoto Oya; Daisuke Muto; Dai Fujiwara
- Web page: https://patentgrep.com/patent/US10483818B2

## CPC

- H02K 3/04: Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H01B 3/305: {Polyamides or polyesteramides}
- H01B 3/306: {Polyimides or polyesterimides}
- H01B 3/427: {Polyethers}
- H01B 7/00: Insulated conductors or cables characterised by their form
- H01B 7/0009: {Details relating to the conductive cores}
- H01B 7/02: Disposition of insulation
- H01B 7/0216: {Two layers}
- H01B 13/065: {Insulating conductors with lacquers or enamels}
- H01F 5/00: Coils (superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00)
- H01F 5/06: Insulation of windings
- 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 3/301: {Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen or carbon in the main chain of the macromolecule, not provided for in group H01B3/302}
- H01B 3/307: {Other macromolecular compounds}
- H01B 13/148: {Selection of the insulating material therefor}
- Y02T 10/64: Electric machine technologies in electromobility
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An insulated wire, having at least one thermosetting resin layer and at least one thermoplastic resin layer in this order, as covering layers, on a conductor having a quadrilateral cross-section, wherein, in a coating thickness of the covering layers, in each side to be formed on 4 sides of the quadrilateral cross-section of said insulated wire, a difference between the maximum value and the minimum value is each 20 μm or less, and a value of the maximum value divided by the minimum value of the whole sides is 1.3 or more; a motor coil; and an electrical or electronic equipment.

## Claims

### Claim 1

An insulated wire, comprising at least one thermosetting resin layer and at least one thermoplastic resin layer in this order, as covering layers, on a conductor having a quadrilateral cross-section,
wherein, in each of 4 covering layer portions corresponding to 4 sides of the cross-section of said insulated wire, a difference between the maximum value and the minimum value of a coating thickness is each 20 μm or less, and in the whole of the above 4 covering layer portions, a value of the maximum value divided by the minimum value of the coating thickness is 1.3 or more.

### Claim 2 (depends on 1)

The insulated wire as claimed in claim 1, wherein, in each of the 4 covering layer portions, an average coating thickness of the thermosetting resin layer is 5 μm or more.

### Claim 3 (depends on 1)

The insulated wire as claimed in claim 1, wherein the covering layer portion giving the maximum value of the coating thickness in the whole of the above 4 covering layer portions, and the covering layer portion giving the minimum value of the coating thickness in the whole of the above 4 covering layer portions, lie next to each other.

### Claim 4 (depends on 1)

The insulated wire as claimed in claim 1, wherein, in the cross-section of the insulated wire, an average of the maximum value and the minimum value of the coating thickness of a pair of the covering layer portions corresponding to long sides facing each other is thinner than an average of the maximum value and the minimum value of the coating thickness of a pair of the covering layer portions corresponding to short sides facing each other.

### Claim 5 (depends on 1)

The insulated wire as claimed in claim 1, wherein a thermosetting resin which constitutes the thermosetting resin layer is selected from the group consisting of polyamideimide and polyimide.

### Claim 6 (depends on 1)

The insulated wire as claimed in claim 1, wherein a tensile elastic modulus at 25° C. of a thermosetting resin which constitutes the thermosetting resin layer is 2,000 MPa or more.

### Claim 7 (depends on 1)

The insulated wire as claimed in claim 1, wherein a thermoplastic to resin which constitutes the thermoplastic resin layer comprises polyetheretherketone or polyphenylenesulfide.

### Claim 8 (depends on 1)

A motor coil comprising a lamination of more than one of the insulated wires as claimed in claim 1.

### Claim 9 (depends on 1)

An electrical or electronic equipment, comprising a built-in laminated body of more than one of the insulated wires as claimed in claim 1.