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Insulating paint for a transformer iron core, and preparation method thereof

A transformer core and insulating varnish technology, applied in coatings, epoxy resin coatings, etc., can solve problems such as poor high temperature resistance and easy decomposition, and achieve the effects of overcoming poor thermal conductivity, no bubble dispersion, and enhanced thermal conductivity

Inactive Publication Date: 2018-09-18
淮北达驰电气科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used insulating varnish is mainly composed of organic polymer materials. Although it has excellent electrical insulation properties and processing characteristics, it is easy to decompose in some high-temperature applications, such as special motors working in high-temperature environments. , Defects of poor high temperature resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An insulating varnish for a transformer iron core, comprising epoxy resin, BN nano-scale high thermal conductivity particles, composite insulating varnish, resin with nucleophilic groups and acetone solution, the epoxy resin is used as the matrix of the insulating varnish, and the composite The insulating varnish is composed of an organic insulating varnish and a silicate-silicon dioxide hybrid. The weight ratio of the organic insulating varnish to the silicate-silicon dioxide hybrid is 90-99:1-10, and its raw materials are in parts by weight As follows: 30 parts of epoxy resin, 13 parts of BN nano-scale high thermal conductivity particles, 20 parts of composite insulating varnish, 20 parts of resin with nucleophilic groups and 15 parts of acetone solution.

[0022] The silicate-silicon dioxide hybrid is silicate particles loaded on the surface of the silicate sheet, the length and width of the silicate sheet are 1-20 μm, and the thickness is ≤1 μm, which is One or two ...

Embodiment 2

[0029] An insulating varnish for a transformer iron core, comprising epoxy resin, BN nano-scale high thermal conductivity particles, composite insulating varnish, resin with nucleophilic groups and acetone solution, the epoxy resin is used as the matrix of the insulating varnish, and the composite The insulating varnish is composed of an organic insulating varnish and a silicate-silicon dioxide hybrid. The weight ratio of the organic insulating varnish to the silicate-silicon dioxide hybrid is 90-99:1-10, and its raw materials are in parts by weight As follows: 35 parts of epoxy resin, 15 parts of BN nano-scale high thermal conductivity particles, 28 parts of composite insulating varnish, 23 parts of resin with nucleophilic groups and 18 parts of acetone solution.

[0030] The silicate-silicon dioxide hybrid is silicate particles loaded on the surface of the silicate sheet. The length and width of the silicate sheet are both 15 μm and the thickness is ≤ 1 μm. It is sericite , ...

Embodiment 3

[0037]An insulating varnish for a transformer iron core, comprising epoxy resin, BN nano-scale high thermal conductivity particles, composite insulating varnish, resin with nucleophilic groups and acetone solution, the epoxy resin is used as the matrix of the insulating varnish, and the composite The insulating varnish is composed of an organic insulating varnish and a silicate-silicon dioxide hybrid. The weight ratio of the organic insulating varnish to the silicate-silicon dioxide hybrid is 90-99:1-10, and its raw materials are in parts by weight As follows: 40 parts of epoxy resin, 18 parts of BN nano-scale high thermal conductivity particles, 30 parts of composite insulating varnish, 28 parts of resin with nucleophilic groups and 20 parts of acetone solution.

[0038] The silicate-silicon dioxide hybrid is silicate particles loaded on the surface of the silicate sheet, the length and width of the silicate sheet are both 20 μm, and the thickness is ≤ 1 μm, which is sericite ...

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PUM

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Abstract

The invention discloses an insulating paint for a transformer iron core. The insulating paint comprises, by weight, 30-40 parts of an epoxy resin, 13-18 parts of a BN nano-scale high-thermal-conduction particle, 20-30 parts of a composite insulating paint, 20-28 parts of a resin having a nucleophilic group, and 15-20 parts of an acetone solution, wherein the epoxy resin is used as the matrix of the insulating paint, the composite insulating paint comprises an organic insulating paint and a silicate-silica hybrid, and a weight ratio of the organic insulating paint to the silicate-silica hybridis 90-99:1-10. According to the present invention, with the BN nano-scale high-thermal-conduction particle, the thermal conductivity of the composite material can be improved, and the thermal conductivity of the sample can be enhanced, such that the breakdown resistance of the insulating paint can be increased; and through the effective integrating of the organic insulating paint and the silicate-silica hybrid, the thermal stability of the target product is substantially improved.

Description

technical field [0001] The invention relates to the technical field of insulating varnish for transformer iron cores, in particular to an insulating varnish for transformer iron cores and a preparation method thereof. Background technique [0002] Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components are primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the purpose, it can be divided into: power transformer and special transformer: electric furnace transformer, rectifier transformer, power frequency test transformer, voltage regulator, mining transformer, audio transformer, intermediate frequency transformer, high frequency transformer, impact transformer, instrument transformer, electronic transformer , reactors, trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/25C09D7/62C09D7/65
CPCC09D163/00C08K2003/385C08K2201/011C08L2201/08C08L2205/03C09D5/00C09D7/62C09D7/65C08L79/08C08L67/06C08L75/04C08K9/12C08K3/36C08K9/00C08K3/38
Inventor 李夫王晓全杨慧侠
Owner 淮北达驰电气科技有限公司
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