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Modified enhanced corona resistant wire and preparation method thereof

A technology of corona resistance and modification, applied in the direction of circuits, electrical components, insulated cables, etc., can solve the problems of accelerated aging and failure of insulating materials, and achieve the effect of improving corona resistance and mechanical properties and application safety

Inactive Publication Date: 2018-10-02
上海旌缘科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The superposition of factors such as dielectric loss heating, space charge, and vibration caused by the corona phenomenon further accelerates the aging and failure of insulating materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. The first composite insulating layer is wrapped on the metal conductor by overlapping wrapping, the wrapping angle is 28°±1.5°, and the overlap rate is 55%±1.5%;

[0024] 2. Perform the first online heat treatment on the wire core coated with the first composite insulating layer, the heat treatment temperature is 435°C, and the online heat treatment rate is 0.08m / s;

[0025] 3. 100 parts by weight of polytetrahydrofuran ether glycol, 25 parts of polyethylene glycol, 35 parts of polypropylene glycol, 20 parts of oxalic acid, 250 parts of ε-caprolactam, 115 parts of terephthalic acid, 6-aminocaproic acid 3 parts, 6 parts of butyl titanate, blended to form a reaction system;

[0026] 4. Pass inert gas into the reaction system, raise the temperature to 220°C at a rate of 8°C / min, keep it for 30min, and perform the first temperature rise treatment, so that the reaction system can undergo the first stage reaction;

[0027] 5. Add 0.1 part of nano-aluminum nitride, 0.1 par...

Embodiment 2

[0034] 1. The first composite insulating layer is wrapped on the metal conductor by overlapping wrapping, the wrapping angle is 29°±1.5°, and the overlap rate is 59%±1.5%;

[0035] 2. Perform the first online heat treatment on the wire core coated with the first composite insulation layer, the heat treatment temperature is 455°C, and the online heat treatment rate is 0.09m / s;

[0036] 3. 100 parts by weight of polytetrahydrofuran ether glycol, 35 parts of polyethylene glycol, 35 parts of polypropylene glycol, 28 parts of oxalic acid, 240 parts of ε-caprolactam, 125 parts of terephthalic acid, 6-aminocaproic acid 3 parts, 8 parts of butyl titanate, blended to form a reaction system;

[0037] 4. Pass inert gas into the reaction system, raise the temperature to 220°C at a rate of 8°C / min, keep it for 30min, and perform the first temperature rise treatment, so that the reaction system can undergo the first stage reaction;

[0038]5. Add 0.2 parts of nano-aluminum nitride, 0.3 par...

Embodiment 3

[0045] 1. The first composite insulating layer is wrapped on the metal conductor by overlapping wrapping, the wrapping angle is 32°±1.5°, and the overlap rate is 60%±1.5%;

[0046] 2. Perform the first online heat treatment on the wire core coated with the first composite insulation layer, the heat treatment temperature is 480°C, and the online heat treatment rate is 0.12m / s;

[0047] 3. 100 parts by weight of polytetrahydrofuran ether glycol, 55 parts of polyethylene glycol, 40 parts of polypropylene glycol, 20 parts of oxalic acid, 280 parts of ε-caprolactam, 150 parts of terephthalic acid, 6-aminocaproic acid 5 parts, 10 parts of butyl titanate, blended to form a reaction system;

[0048] 4. Pass inert gas into the reaction system, raise the temperature to 220°C at a rate of 8°C / min, keep it for 30-50min, and perform the first temperature rise treatment, so that the reaction system can undergo the first-stage reaction;

[0049] 5. Add 0.1 part of nano-aluminum nitride, 0.5...

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Abstract

The invention relates to a modified enhanced corona resistant wire and a production method thereof. The modified enhanced corona resistant wire disclosed by the embodiment of the invention consists ofa metal conductor, a first composite insulating layer and a second composite insulating layer. Compared with the prior art, the production method in the embodiment disclosed by the invention has thecharacteristics that a polyurethane composite insulating layer of which double sides are coated with polytetrafluoroethylene is used as the first composite insulating layer; a second composite insulating layer is prepared by using polytetrahydrofuran ether glycol, polyethylene glycol, polypropylene glycol, oxalic acid, epsilon-caprolactam, terephthalic acid, 6-aminocaproic acid, butyl titanate, nanometer aluminum nitride, nanometer boron nitride and nano-silica. Therefore, according to the production method of the modified enhanced corona resistant wire disclosed by the embodiment of the invention, corona resistance of the wire can be significantly improved and mechanical properties of the wire are improved, so that the wire is safer and more convenient to apply.

Description

technical field [0001] The invention relates to an electric wire and a preparation method thereof, in particular to a modified enhanced corona-resistant electric wire and a preparation method thereof. Background technique [0002] Frequency conversion motors are widely used in various industrial fields. In application environments such as airtight complex and high temperature, frequency conversion motors have a high failure rate and short service life. The performance and life of the variable frequency motor are closely related to the wires used inside it. Under the high frequency and high voltage of AC, the polymer in the insulation layer of the electromagnetic wire is prone to local ionization. When the electric field strength reaches the critical field strength, the nearby gas will be locally ionized, blue fluorescent discharge will appear, and ozone will be generated at the same time. The superposition of factors such as dielectric loss heating, space charge, and vibrat...

Claims

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Application Information

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IPC IPC(8): C08L77/12C08K3/28C08K3/38C08K3/36C08G69/44H01B3/30H01B7/18H01B7/02
CPCC08K3/28C08K3/36C08K3/38C08K2003/282C08K2003/385C08K2201/011C08L2203/206H01B3/302H01B3/305H01B7/0258H01B7/1875C08L77/12
Inventor 范雷方吴振江沈刚
Owner 上海旌缘科技股份有限公司
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