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Insulated wire and method of manufacture, coil or winding

A technology of insulated wires and manufacturing methods, which is applied in the field of electromagnetic wires, can solve problems such as the intolerance to bending of inorganic ceramic insulated wires, poor high-temperature insulation performance of wires, etc., and achieve the ability to maintain electrical conductivity, good bending resistance, and good high-temperature insulation performance effect

Active Publication Date: 2021-10-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present application provides an insulated wire. The insulated wire has a metal oxide insulating layer formed by in-situ oxidation of a simple metal or an alloy material on the periphery of the wire core, and has good high-temperature insulation performance and bending resistance. To a certain extent, solve the technical problems of the poor high-temperature insulation performance of the existing organic insulating layer wires and the inability of the inorganic ceramic insulated wires to withstand bending

Method used

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  • Insulated wire and method of manufacture, coil or winding
  • Insulated wire and method of manufacture, coil or winding
  • Insulated wire and method of manufacture, coil or winding

Examples

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Embodiment 1

[0086] A method for preparing an insulated wire, comprising:

[0087] 1. Choose 2520 stainless steel seamless pipe as the casing material, the inner diameter of the stainless steel casing is 20.1mm, and the wall thickness is 1mm; after alkali cleaning the inner wall of the stainless steel casing, conduct ultrasonic waves in pure water at 30°C to 40°C wash, then air dry;

[0088] 2. Select a copper rod with a diameter of 20.0mm for surface treatment, remove scale, and then insert it into the inner hole of the cleaned stainless steel casing in step 1 to form a 2520 stainless steel / Cu composite blank; and use copper at one end of the stainless steel casing sheet welding back cover;

[0089] 3. The composite billet was annealed at 800°C, and then hot-extruded at 400°C under high pressure, with a hot-extrusion rate of 2.6mm / min, and finally made into 2520 stainless steel / Cu composite rods;

[0090] 4. The composite bar is drawn for multiple passes with a deformation rate of 3-9% ...

Embodiment 2

[0094] A method for preparing an insulated wire, comprising:

[0095] 1. Select Nb tube as the casing material. The inner diameter of the Nb tube is 25.0mm and the wall thickness is 5mm; after alkali cleaning the inner wall of the Nb tube, perform ultrasonic cleaning in pure water at 30°C to 40°C, and air dry;

[0096] 2. Select a copper rod with a diameter of 25.0mm for surface treatment, remove the scale, and put it into the inner hole of the treated Nb tube under heating to form a Nb / Cu composite blank; one end of the Nb tube is welded with a copper sheet to seal the bottom;

[0097] 3. The composite billet was annealed at 750°C, and then hot-extruded at 300°C under high pressure, with a hot-extrusion rate of 4.2mm / min, and finally made into Nb / Cu composite rods;

[0098] 4. The composite bar is drawn for multiple passes with a deformation rate of 6-15% per pass and a rate of 10-20m / min, and intermittent annealing is carried out. After rough drawing, medium drawing and fine...

Embodiment 3

[0102] A method for preparing an insulated wire, comprising:

[0103] 1. Select a pure copper wire with a diameter of 0.9mm after drawing and annealing, pickle the surface, then ultrasonically clean it in pure water, and then dry it;

[0104] 2. Heat the aluminum-magnesium alloy material to 560°C-580°C in the vacuum reactor to make it fully melt; immerse the pure copper wire from the Φ0.9mm inlet at the upper end of the reactor into the molten aluminum at a speed of 5-10m / min , and then pass through the Φ0.910mm outlet at the lower end of the reactor; after soaking, a layer of 10μm thick aluminum alloy layer is formed on the surface of the copper wire, and the diameter of the composite wire is 0.910mm;

[0105] 3. Carry out hard anodic oxidation treatment on the composite wire to form an aluminum oxide layer. The parameters of the anodic oxidation treatment are: use a sulfuric acid anodizing solution with a concentration of 180-200g / L, an oxidation temperature of 15-18°C, and ...

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Abstract

The application provides an insulated wire, comprising a wire core and a metal oxide insulating layer covering the periphery of the wire core; or including a wire core and an intermediate layer and a metal oxide insulating layer covering the periphery of the wire core in turn; the material of the wire core includes Cu, Al, Ag or their alloys; the intermediate layer includes Ni, Nb, Cr, Fe, Al, Zr, Ti, V, W, Mo, Cu elemental or an alloy containing one or more of the above metal elements, the intermediate layer and The material of the wire core is different; the metal oxide insulating layer includes oxides of one or more metal elements in Ni, Nb, Cr, Fe, Al, Zr, Ti, V, W, Mo, and Cu. The insulated wire has a good high-temperature insulation performance and bending resistance by providing a metal oxide insulation layer on the periphery of the wire core. The insulated wire is used for device preparation, and can also reduce device assembly difficulty and cost. The present application also provides coils or windings, and magnetic components including the coils or windings.

Description

technical field [0001] The present application relates to the technical field of electromagnetic wires, in particular to an insulated wire, a manufacturing method thereof, a coil or a winding. Background technique [0002] Magnet wire is an insulated wire used to make coils or windings in electrical products. The construction of a magnet wire generally includes a conductive core and an electrically insulating layer covering the conductive core. At present, electrical insulating layers mainly include organic insulating layers and inorganic insulating layers. The existing organic insulating layer is usually made of organic polymer materials such as paper, cotton, silk, glass fiber, resin or insulating paint; while the existing inorganic insulating layer is generally made of Al 2 o 3 , SiO 2 , ZnO and other ceramic materials are mixed with organic solvents to form a slurry and then coated on the surface of the wire core to form. However, the maximum operating temperature o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F5/06H01F19/00H01B7/02H01B7/04H01B7/18H01B13/06H01B13/22
CPCH01B7/02H01B7/04H01B7/18H01B13/06H01B13/22
Inventor 赖彬王子京景遐明张浩军
Owner HUAWEI TECH CO LTD
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