Method for preparing corona-resistant enameled wire and product

A technology of corona resistance and enameled wire, which is used in cable/conductor manufacturing, circuits, insulated cables, etc., can solve the problems of limited corona resistance, poor adhesion and limited proportion, and achieve good adhesion and corona resistance. performance, the effect of meeting the requirements of corona resistance and temperature resistance

Active Publication Date: 2011-01-26
株洲兆源机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology makes wires that are resistant against damage caused by high voltage electricity or other factors such as heating during manufacturing processes. These wires have multiple layers made from materials like epoxy resin mixed together for better strength at higher voltages than traditional methods. They also include an inner metal conductor covered by another material called aluminum oxide (Al2O3). By repeating this process repeatedly over several times they create a strong yet flexible protective covering around each individual component's surface.

Problems solved by technology

This patented technical solution describes an improved type of electric machine called Variable Frequency Motor Controller (VFC), specifically relates to the improvement of the durable property of insulated components such as transformers during operation. These improvements include preventive measures against damage from excess current flow through certain areas of these components, including punched holes, electrode flanks, magnetic polishing rings, bushings, and terminal windings. Additionally, there may exist various methods proposed to improve the corrosion protection provided by different types of insulants like epoxy resin paints and nitride plasma compositions.

Method used

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  • Method for preparing corona-resistant enameled wire and product
  • Method for preparing corona-resistant enameled wire and product
  • Method for preparing corona-resistant enameled wire and product

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Description of materials and equipment used, (1) Polyester corona-resistant paint, self-made, viscosity (coated -4# cup, 30±1°C) 120s, solid content (2g / 200±2°C / 1h) 38%; (2 ) Polyesterimide corona-resistant paint, self-made, viscosity (coated with -4# cup, 30±1°C) 130s, solid content (2g / 200±2°C / 1h) 39%; (3) polyamideimide Paint, TONGMID 595 / 36MB, produced by Elantas, solid content (2g / 200±2℃ / 1h) 36%; (4) Enamelling machine, produced by Wuxi Tongchuang, vertical enameling machine, mold coating.

[0025] The preparation method is as follows:

[0026] (1) Wire drawing: First, anneal the Φ8.00mm low-oxygen copper rod on the large wire drawing equipment while annealing it into a Φ2.90mm semi-finished bare wire, and then pull it into the required specification bare copper wire on the intermediate drawing machine;

[0027] (2) Pay-off: place the qualified bare copper wire vertically below the ceramic ring of the pay-off frame, and use brush-type pay-off;

[0028] (3) Cl...

Embodiment 2

[0037] The preparation method of Example 2 is the same as that of Example 1, except that the copper core used is different, and the copper core wire of Ф1.25 mm is used; when making the insulating layer, the surface of the bare copper wire of Ф1.25 mm is coated with 4 coats of polyester corona-resistant paint, coated in sequence according to the paint molds of specifications 1.30, 1.31, 1.32, and 1.33, and then baked and cured one by one to form a polyester corona-resistant insulating layer; and then coated with 7 coats of polyesterimide Corona-resistant paint, coated in sequence according to the specifications of 1.33, 1.34, 1.35, 1.36, 1.37, 1.37, 1.38, and then baked and cured one by one to form a polyesterimide corona-resistant insulating layer; finally, two coats The polyamide-imide paint is applied sequentially according to the paint molds of 1.39 and 1.39 specifications, and is baked and cured one by one to form a polyamide-imide insulating layer, and finally a Ф1.25mm c...

Embodiment 3

[0039] The preparation method of Example 2 is the same as that of Example 1, except that the copper core used is different, and the copper core wire of Ф1.50 mm is used; when making the insulating layer, the surface of the bare copper wire of Ф1.50 mm is coated with 4 coats of polyester corona-resistant paint, coated in sequence according to the paint molds of specifications 1.55, 1.56, 1.57, and 1.58, and then baked and cured one by one to form a polyester corona-resistant insulating layer; and then coated with 7 coats of polyesterimide Corona-resistant paint, coated in sequence according to the paint molds of specifications 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, and then baked and cured one by one to form a polyesterimide corona-resistant insulating layer; finally coat 2 layers The polyamide-imide paint is applied sequentially according to the paint molds of 1.66 and 1.66 specifications. After baking and curing step by step, the polyamide-imide insulating layer is formed, ...

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Abstract

The invention discloses a method for preparing a corona-resistant enameled wire and a product. The method comprises the following steps of: drawing wires; paying off; cleaning; annealing; cooling; painting and baking; lubricating; and winding up. The surface of a bare wire is firstly coated with four layers of corona-resistant polyester paint, then is coated with seven layers of corona-resistant polyester imide paint, and is finally coated with two layers of corona-resistant polyamide imide paint; and the baking and cooling are performed after painting each time, and then the next painting is performed. During baking, the corona-resistant enameled wire is from a lower layer to an upper layer of a baking oven, the temperature of an inlet of the baking oven is between 150 and 160 DEG C, the temperature of the lower layer of the baking oven is between 255 and 265 DEG C, the temperature before primary catalysis is between 365 and 375 DEG C, and the additional heating temperature after the catalysis is between 465 and 475 DEG C. The corona-resistant enameled wire produced by the method is a corona-resistant enameled wire with a composite insulation layer, the center of the corona-resistant enameled wire is a copper core, and the composite insulation layer is formed by combining a corona-resistant polyester (CPE) insulation layer, a corona-resistant polyester imide (CPEI) insulation layer and a polyamide imide (PAI) insulation layer.

Description

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Claims

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Application Information

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Owner 株洲兆源机电科技有限公司
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