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Insulated wire and method of manufacturing the same

A technology of insulated wires and manufacturing methods, applied in the direction of insulated cables, insulators, insulated conductors, etc., can solve the problems of insulation sheath deterioration and damage of insulated wires, achieve excellent heat resistance and adhesion, and high partial discharge inception voltage Effect

Inactive Publication Date: 2013-02-06
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since a higher voltage such as inverter surge voltage is applied to the coil in this electrical equipment, partial discharge may cause deterioration and damage to the insulation sheath of the insulated wire

Method used

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  • Insulated wire and method of manufacturing the same
  • Insulated wire and method of manufacturing the same

Examples

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Effect test

Embodiment approach

[0039] figure 1 It is a cross-sectional view of an insulated wire according to an embodiment of the present invention. figure 1 In , the symbol 10 representing the whole is an example of a typical insulated wire 10 of this embodiment. The basic configuration of this insulated wire 10 has a conductor 20 and an extruded coating 30 .

[0040] (conductor)

[0041] As the conductor 20, for example, a single wire made of copper or a copper alloy may be used, or a configuration formed by twisting a plurality of copper wires or copper alloy wires may be employed.

[0042] As copper, for example, oxygen-free copper, low-oxygen copper having a small oxygen content, or the like can be used.

[0043] figure 1 In , an example having a circular cross section as the cross-sectional shape of the conductor 20 is illustrated. Of course, the conductor 20 is not limited to the illustrated example, and may have various cross-sectional shapes such as a rectangular cross-section as the cross-se...

Embodiment 1

[0110] Hereinafter, referring to Table 1, the insulated wires of Examples and Comparative Examples, which are more specific embodiments of the present invention, will be described in detail. In addition, this Example cites a typical example of the insulated wire of this invention, and this invention is not limited to these Examples.

[0111] Samples of the insulated wires of Examples 1 to 5 and Comparative Examples 1 to 4 having various extrusion coating layers were prepared. These samples were compared and evaluated for appearance, modulus of elasticity, partial discharge inception voltage, adhesion and heat resistance. The components of the extrusion coating layer, the processing conditions, and the thickness of the extrusion coating layer of each sample are summarized and shown in Table 1 below.

[0112] Table 1

[0113]

[0114] (production of insulated wire)

[0115] A plurality of copper wires with an outer diameter of 1.25 mm were prepared as conductors, and nine ...

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Abstract

The invention provides a insulated wire and method of manufacturing the same, wherein the insulated wire is characterized by a high partial discharge inception voltage, and excellent heat resistance and adaption tightness. The insulated wire (10) includes a conductor, and an insulation covering layer around the conductor. The insulation covering layer includes a resin composition containing a resin (A) including at least one of a polyphenylene sulfide resin and a polyetheretherketone resin and a resin (B) containing a polyethylene. The resin composition has a storage elastic modulus at 150 DEG C. of not less than 1105 Pa and not more than 1109 Pa, and a store elastic modulus at 300 DEG C. of not less than 1104 Pa and not more than 1108 Pa.

Description

technical field [0001] The present invention relates to an insulated wire and a manufacturing method thereof, and more particularly to an insulated wire used in coils of electrical equipment such as a rotating electric machine and a transformer, and a manufacturing method thereof. Background technique [0002] Conventional insulated wires used in coils of electrical equipment such as rotating machines and transformers generally have a structure such as that represented by enamel-coated insulated wires. The outer periphery of the conductor is covered with a single or multiple layers of insulating sheath. [0003] Such conventional methods for producing insulated wires include: a method of applying an insulating paint obtained by dissolving a resin in an organic solvent on the outer peripheral surface of a conductor and then baking it; method on the peripheral surface. [0004] In recent years, insulated wires have been required to improve mechanical properties such as adhes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/02H01B13/14
CPCH01B3/42H01B3/40H01B13/14H01B7/02H01B3/447H01B3/441H01B3/301
Inventor 森下滋宏山崎孝则百生秀人
Owner HITACHI METALS LTD
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