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Film capacitor impregnant

A technology of film capacitors and impregnating agents, which is applied in the direction of drying/impregnating machines, etc., can solve the problems of limiting impregnating agents such as capacitor type and function, freezing point, dielectric coefficient, and dielectric loss, etc. Effects of discharge performance, low freezing point, and low viscosity

Active Publication Date: 2017-05-10
ANHUI FEIDA ELECTRICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, it is found that although the thermal expansion coefficient, flash point, ignition point, and breakdown voltage of vegetable oil (such as castor oil) are good, its parameters such as freezing point, dielectric coefficient, and dielectric loss are not ideal, which limits its use. Types and functions of capacitors used as impregnants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A film capacitor impregnating agent is made of the following materials in parts by weight:

[0025] 100 parts of mixed vegetable oil, 4 parts of modified bentonite, 3 parts of urea-formaldehyde resin, 2 parts of phenolic resin, 2 parts of 1,1-diphenylethane, 1 part of nano-silica, 2 parts of sodium alkylnaphthalene sulfonate, 3 parts of sodium methylcellulose, 4 parts of sodium fatty alcohol polyoxyethylene ether sulfate; the mixed vegetable oil is made of the following parts by weight: 60 parts of olive oil, 8 parts of coconut oil, 5 parts of grapeseed oil, rapeseed 15 parts of oil, 10 parts of cottonseed oil, 4 parts of rice bran oil, 3 parts of jojoba oil, and 4 parts of evening primrose oil; the modified bentonite is made of the following parts by weight: 30 parts of bentonite, 2 parts of glycerin, hard 2 parts of sodium hyaluronate, 1 part of polydimethylsiloxane, 1 part of sodium hexametaphosphate, and 1 part of fatty acid polyethylene glycol ester.

[0026] Furt...

Embodiment 2

[0037] A film capacitor impregnating agent is made of the following materials in parts by weight:

[0038]110 parts of mixed vegetable oil, 6 parts of modified bentonite, 4 parts of urea-formaldehyde resin, 3 parts of phenolic resin, 2 parts of 1,1-diphenylethane, 2 parts of nano-silica, 3 parts of sodium alkylnaphthalene sulfonate, carboxylic acid 5 parts of sodium methylcellulose, 6 parts of fatty alcohol polyoxyethylene ether sodium sulfate; the mixed vegetable oil is made of the following parts by weight: 65 parts of olive oil, 10 parts of coconut oil, 8 parts of grapeseed oil, rapeseed 18 parts of oil, 12 parts of cottonseed oil, 7 parts of rice bran oil, 4 parts of jojoba oil, and 5 parts of evening primrose oil; the modified bentonite is made of the following parts by weight: 35 parts of bentonite, 3 parts of glycerin, hard 2 parts of sodium hyaluronate, 2 parts of polydimethylsiloxane, 2 parts of sodium hexametaphosphate, 1 part of fatty acid polyethylene glycol ester....

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PUM

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Abstract

The invention discloses a film capacitor impregnant which is prepared from mixed vegetable oil, modified bentonite, urea-formaldehyde resin, phenolic resin, 1, 1-diphenyl ethane, nano silicon dioxide, sodium alkyl naphthalene sulfonate, carboxymethylcellulose sodium, and fatty alcohol polyoxyethylene ether sodium sulfate. The mixed vegetable oil is prepared from olive oil, coconut oil, grape seed oil, rapeseed oil, cottonseed oil, rice bran oil, jojoba oil, and evening primrose oil. The modified bentonite is prepared from bentonite, glycerin, sodium stearate, polydimethylsiloxane, sodium hexametaphosphate, and fatty acid polyethylene glycol ester. The impregnant prepared by the method is highly compatible with films, and has high aromaticity, low viscosity and low solidifying point. The low-temperature partial discharge performance of film capacitors is improved. The ratio characteristic, stability and service life of products are improved.

Description

technical field [0001] The invention relates to a capacitor impregnating agent, in particular to a film capacitor impregnating agent. Background technique [0002] Film capacitors are widely used in analog circuits due to their excellent characteristics such as non-polarity, high insulation resistance, excellent frequency characteristics (broad frequency response), and low dielectric loss. Film capacitors usually need to add an impregnating agent in the gap of the film to improve the specificity and operation stability of the product. The capacitor impregnants currently used at home and abroad are: alkylbenzene (AB oil), phenylxylylethane (PXE, also known as diaryl ethane, S oil) and single / double benzyltoluene (M / DBT Also known as C101). Among them, alkylbenzene is a kind of synthetic insulating oil that was used after the prohibition of polychlorinated biphenyls. Its electrical and physical properties are better than mineral oil and its price is low, but its gas absorpti...

Claims

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Application Information

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IPC IPC(8): H01G13/04
CPCH01G13/04
Inventor 胡忠胜华玲萍吴良军
Owner ANHUI FEIDA ELECTRICAL TECH CO LTD
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