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Dry type power transformer

A power transformer, dry-type technology, applied in the field of transformers, can solve the problems of reducing the safety and reliability of electrical equipment such as transformers, poor hydrophobicity of enameled wire paint, and reduced mechanical and electrical properties of enameled wire, etc., and achieves remarkable hydrophobicity and moisture resistance. , the effect of reducing water absorption, improving safety and reliability

Active Publication Date: 2017-02-22
JIANGSU YAWEI TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wire enamel has good insulation and oil resistance, and has good adhesion to copper wires, but the wire enamel provided by the invention has poor hydrophobicity, which leads to a decrease in the mechanical and electrical properties of the enameled wire, thereby reducing the use of the wire enamel. Transformers, etc. Safety and reliability of electrical equipment

Method used

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  • Dry type power transformer
  • Dry type power transformer

Examples

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Embodiment 1

[0009] A dry-type power transformer is provided in this embodiment, comprising an iron core, an enameled wire surrounding the iron core, the enameled wire includes a wire and an enameled wire enamel covering the wire, and the enameled wire enamel includes the following components in parts by weight: dimethyl terephthalate 100 parts of ester, 40 parts of m-phenylenediamine, 50 parts of trimellitic anhydride, 15 parts of ethylene glycol, 20 parts of decabromodiphenylethane, 10 parts of mica powder, 30 parts of phenol, 70 parts of glycerin, 8 parts of crosslinking agent, flow 4 parts of leveling agent, 15 parts of solvent.

[0010] Wherein, the crosslinking agent is trimethylolpropane, the leveling agent is acrylic resin, and the solvent is styrene.

[0011] The preparation process of enameled wire varnish is as follows:

[0012] Step a: Take the following components in parts by weight: 100 parts of dimethyl terephthalate, 40 parts of m-phenylenediamine, 50 parts of trimellitic ...

Embodiment 2

[0016] A dry-type power transformer is provided in this embodiment, comprising an iron core, an enameled wire surrounding the iron core, the enameled wire includes a wire and an enameled wire enamel covering the wire, and the enameled wire enamel includes the following components in parts by weight: dimethyl terephthalate 103 parts of ester, 45 parts of m-phenylenediamine, 52 parts of trimellitic anhydride, 16 parts of ethylene glycol, 24 parts of decabromodiphenylethane, 12 parts of mica powder, 35 parts of phenol, 73 parts of glycerin, 10 parts of crosslinking agent, flow 4.2 parts of leveling agent, 16 parts of solvent.

[0017] Among them, the cross-linking agent is m-xylylenediamine, and the leveling agent is a mixture of polymethylphenylsiloxane, trichlorethylene and ethylene glycol ether in a weight ratio of 1:1.

[0018] The preparation process of enameled wire varnish is as follows:

[0019] Step a: Take the following components in parts by weight: 103 parts of dimet...

Embodiment 3

[0023] A dry-type power transformer is provided in this embodiment, comprising an iron core, an enameled wire surrounding the iron core, the enameled wire includes a wire and an enameled wire enamel covering the wire, and the enameled wire enamel includes the following components in parts by weight: dimethyl terephthalate 105 parts of ester, 48 parts of m-phenylenediamine, 53 parts of trimellitic anhydride, 19 parts of ethylene glycol, 28 parts of decabromodiphenylethane, 14 parts of mica powder, 38 parts of phenol, 76 parts of glycerin, 12 parts of crosslinking agent, flow 4.5 parts of leveling agent, 18 parts of solvent.

[0024] Among them, the crosslinking agent is a mixture of trimethylolpropane, m-xylylenediamine and tetra-n-butyl titanate in a weight ratio of 1.5:1:2.5, and the leveling agent is acrylic resin and polydimethylsiloxane Alkanes are mixed at a weight ratio of 1:1, and solvents such as styrene, trichloroethylene and ethylene glycol ether are mixed at a weigh...

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PUM

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Abstract

The invention provides a dry-type power transformer which comprises an iron core and an enamelled wire around the iron core, wherein the enamelled wire comprises a wire and a wire enamel coated on the wire. The wire enamel comprises the following components in parts by weight: 105 parts of dimethyl terephthalate, 48 parts of m-phenylenediamine, 53 parts of trimellitic anhydride, 19 parts of ethylene glycol, 28 parts of decabromodiphenylethane, 14 parts of mica powder, 38 parts of phenol, 76 parts of glycerol, 12 parts of crosslinking agent, 4.5 parts of leveling agent and 18 parts of solvent. According to the dry-type power transformer provided by the invention, the wire enamel is coated on the wire around the iron core, the water absorptivity of the wire enamel is lowered by 57% as compared with the polyester imine wire enamel in the prior art, and the wire enamel has obvious hydrophobicity and moisture resistance, so that the mechanical and electric properties of the prepared enamelled wire are enhanced, thereby enhancing the safety and reliability of the dry-type power transformer provided by the invention.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a dry-type power transformer. Background technique [0002] With the rapid development of society, people rely more and more on various electrical appliances in their daily life, and put forward higher and higher requirements for the development of electrical appliances. Among them, the performance of insulating materials used in electrical appliances is improved. also received more attention. As one of the core components of insulating materials for electrical appliances, enameled wire enamel is a coating that can create a good insulating layer between wires in motor windings. It is mainly used for bare copper wires and alloy wires of various wire diameters. And the outer layer of glass fiber covered wire to improve and stabilize the performance of enameled wire. In various electrical appliances, there are some high requirements for the performance of enameled wire enamel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D5/25C09D7/06C09D7/00C09D7/12H01B7/02C09D7/47
CPCC08L2205/03C09D7/20C09D7/47C09D7/61C09D7/63C09D179/08H01B7/02C08L33/00C08K13/02C08K5/03C08K3/34C08K5/053C08K5/01C08L83/04C08K5/06
Inventor 田正稳
Owner JIANGSU YAWEI TRANSFORMER