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Corona-resistant groove insulation material and preparation method thereof

A technology of slot insulation and corona resistance is applied in the field of corona-resistant composite materials of slot insulation and its preparation, which can solve the problem of poor corona resistance life, inability to improve the resistance of variable frequency motors to high-frequency pulse voltage, and inability to meet the use requirements of variable frequency motors and other problems, to achieve the effect of strong impregnation, improving mechanical properties and electrical insulation properties, and reducing partial discharge

Active Publication Date: 2013-11-20
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current slot insulation materials for frequency conversion motors mainly include polyester film polyester non-woven composite material (DMD), polyester film and polyaramid fiber paper composite material (NMN), polyimide film and polyaramid fiber paper composite material materials (NHN), etc. These composite materials have poor corona resistance life and cannot improve the ability of variable frequency motors to resist high frequency pulse voltage
Therefore, the existing electrical soft composite materials can no longer meet the requirements of frequency conversion motors

Method used

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  • Corona-resistant groove insulation material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a corona-resistant tank insulating material, and its preparation method is as follows: on the coating composite equipment, the polyester film with a thickness of 0.05mm is unwound, dipped in nano-modified adhesive glue solution A, and scraped on both sides, Baking in the drying tunnel to remove the solvent, composite the mica paper with a thickness of 0.10mm on both sides, hot-press composite, evenly coat the nano-modified adhesive glue B on the mica paper on both sides, dry in the drying tunnel, cool, and wind up. Post-curing treatment, edge trimming, the corona-resistant insulation material is obtained, and the adhesive content is 15.6%.

[0026] The above nano-modified adhesive glue A is composed of 36% nano-modified epoxy adhesive and 64% solvent (toluene + acetone);

[0027] The above nano-modified adhesive solution B is composed of 18% nano-modified epoxy adhesive and 72% solvent (toluene + acetone);

[0028] The above-mentioned nano-modi...

Embodiment 2

[0030] This embodiment provides a corona-resistant tank insulating material, and its preparation method is as follows: on the coating composite equipment, the polyimide film with a thickness of 0.05 mm is unrolled, dipped in nano-modified adhesive glue solution A, and scraped on both sides. Adhesive, baked in a drying tunnel to remove solvent, laminated mica paper with a thickness of 0.11 mm on both sides, hot-pressed and laminated, evenly coated nano-modified adhesive glue B on both sides of the mica paper, dried in a drying tunnel, cooled, and collected Roll, post-curing treatment, and edge trimming, the corona-resistant insulation material is obtained, and the adhesive content is 18.5%.

[0031] The above nano-modified adhesive glue A is composed of 40% nano-modified epoxy adhesive and 60% solvent (toluene + acetone);

[0032] The above nano-modified adhesive solution B is composed of 15% nano-modified epoxy adhesive and 85% solvent (toluene + acetone);

[0033] The above ...

Embodiment 3

[0035] This embodiment provides a corona-resistant tank insulating material, the preparation method of which is as follows: on the coating composite equipment, the polyester film with a thickness of 0.10mm is unwound, dipped in nano-modified adhesive glue solution A, and scraped on both sides. Baking in the drying tunnel to remove the solvent, composite the mica paper with a thickness of 0.12mm on both sides, hot-press composite, and evenly coat the nano-modified adhesive glue B on the mica paper on both sides, dry in the drying tunnel, cool, and wind up. Post-curing treatment, edge trimming, the corona-resistant insulation material is obtained, and the adhesive content is 13.7%.

[0036] The above nano-modified adhesive solution A is composed of 35.1% nano-modified epoxy adhesive and 64.9% solvent (toluene + acetone);

[0037] The above nano-modified adhesive solution B is composed of 14.8% nano-modified epoxy adhesive and 85.2% solvent (toluene + acetone);

[0038] The abov...

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Abstract

The invention relates to a corona-resistant groove insulation material and a preparation method thereof. The groove insulation material sequentially comprises a first adhesive layer, a first mica paper layer, a second adhesive layer, a film layer, a third adhesive layer, a second mica paper layer and a fourth adhesive layer from top to bottom, wherein the first adhesive layer, the second adhesive layer, the third adhesive layer and the fourth adhesive layer are respectively formed by nano modified adhesive, the nano modified adhesive is the adhesive which is mixed with nano powder body, the content of the nano powder body in the nano modified adhesive is 15 to 25 percent, and the granularity of the nano powder body is 20nm to 100nm. The corona-resistant service life of the insulation material can be improved by more than 50 times compared with the existing groove insulation material; and meanwhile, the paint quantity in the resin immersing process can be increased, and the mechanical property and the electric insulation performance of a curing system can be improved. In addition, the cost of the groove insulation material is lower, so that the industrialized mass production and popularization of the groove insulation material can be favored.

Description

technical field [0001] The invention relates to an insulating material, in particular to a corona-resistant composite material used for slot insulation of frequency conversion motors and the like and a preparation method thereof. Background technique [0002] With the development of electrical technology, variable frequency motors with remarkable energy saving effects have been widely used in recent years. Because the frequency converter used by the frequency conversion motor produces high-frequency pulse voltage, which is extremely destructive to the insulation system, the premature damage of the frequency conversion motor often occurs, and the advantages of energy saving, high efficiency, and convenient use of the frequency conversion motor cannot be truly utilized. To prolong the service life and operational reliability of variable frequency motors, the key is to improve the corona resistance of insulating materials so that they can resist the influence of high-frequency ...

Claims

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Application Information

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IPC IPC(8): H01B3/04H01B3/10H01B3/30H01B3/42H01B17/60H01B17/66H01B19/00C09J163/00C09J11/04H02K3/30
Inventor 徐伟红夏宇周成胡兆楠
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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