Composite impregnant capable of substantially prolonging service life of metallic film capacitor and preparation method thereof

A metallized film and composite technology, which is applied in capacitors, fixed capacitors, drying/impregnating machines, etc., can solve the problems of high dielectric loss, high cost, secondary moisture of oil, etc., and achieve low dielectric loss and thermal expansion Coefficient, increase in capacitor life, and the effect of preventing secondary moisture

Active Publication Date: 2014-07-23
WUXI HONGGUANG CAPACITOR
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these oils can be vacuum dehydrated in advance, some manufacturers of metallized film capacitors have begun to do so, but this not only requires more complicated equipment and costs a lot, but the most important thing is that it cannot prevent these oils from dehydrating. Such secondary...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of modified soybean oil:

[0029] a) Put ordinary soybean oil in a reaction kettle, add hydrogen peroxide, glacial acetic acid and 98% concentrated sulfuric acid in sequence, and heat and stir at 45°C for 6 hours; among them, soybean oil, hydrogen peroxide, glacial acetic acid and concentrated The mass ratio of sulfuric acid is: 6.0 parts of soybean oil, 3.5 parts of 15% hydrogen peroxide, 2.0 parts of glacial acetic acid, and 0.6 parts of 98% concentrated sulfuric acid;

[0030] b) Leave the soybean oil after the complete stirring reaction for 2 hours, and monitor in real time through the sight glass on the reactor until the soybean oil in the reactor is completely separated; Discharge, the supernatant liquid that stays in the reactor is modified soybean oil;

[0031] (2) Preparation of modified molecular sieves:

[0032] a) Put conventional molecular sieves into a high-speed stirring tank, heat and stir at a speed of 4800 rpm for 3 hours until crushe...

Embodiment 2

[0041] (1) Preparation of modified soybean oil:

[0042]a) Put ordinary soybean oil in a reaction kettle, add hydrogen peroxide, glacial acetic acid and 98% concentrated sulfuric acid in sequence, and heat and stir at 40°C for 6 hours; among them, soybean oil, hydrogen peroxide, glacial acetic acid and concentrated The mass ratio of sulfuric acid is: 7.0 parts of soybean oil, 3.5 parts of 15% hydrogen peroxide, 1.5 parts of glacial acetic acid, and 1.0 part of 98% concentrated sulfuric acid;

[0043] b) The soybean oil after the complete stirring reaction was left to stand for 1 hour, and the real-time monitoring was carried out through the sight glass on the reactor until the soybean oil in the reactor was completely separated; Discharge, the supernatant liquid that stays in the reactor is modified soybean oil;

[0044] (2) Preparation of modified molecular sieves:

[0045] a) Put conventional molecular sieves into a high-speed stirring tank, heat and stir at a speed of 420...

Embodiment 3

[0054] (1) Preparation of modified soybean oil:

[0055] a) Put ordinary soybean oil in a reaction kettle, add hydrogen peroxide, glacial acetic acid and 98% concentrated sulfuric acid in sequence, and heat and stir at 50°C for 5 hours; among them, soybean oil, hydrogen peroxide, glacial acetic acid and concentrated The mass ratio of sulfuric acid is: 5.5 parts of soybean oil, 4.5 parts of 10% hydrogen peroxide, 2.5 parts of glacial acetic acid, and 0.5 part of 98% concentrated sulfuric acid;

[0056] b) The soybean oil after the complete stirring reaction was left to stand for 1 hour, and the real-time monitoring was carried out through the sight glass on the reactor until the soybean oil in the reactor was completely separated; Discharge, the supernatant liquid that stays in the reactor is modified soybean oil;

[0057] (2) Preparation of modified molecular sieves:

[0058] a) Put conventional molecular sieves into a high-speed stirring tank, heat and stir at a speed of 55...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Dielectric strengthaaaaaaaaaa
Dielectric strengthaaaaaaaaaa
Dielectric strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a composite impregnant capable of substantially prolonging the service life of a metallic film capacitor and a preparation method of the composite impregnant. The composite impregnant comprises, by weight, 7.0 parts to 8.5 parts of modified soybean oil, 2.5 parts to 4.5 parts of polyisobutene, and 1.0 part to 3.0 parts of modified molecular sieves. The preparation method of the composite impregnant comprises the modified soybean oil preparation step, the modified molecular sieve preparation step and the composite impregnant preparation step. According to the composite impregnant, the amount of water generated in the raw material production process and the using process can be effectively reduced, namely, the negative factors influencing the service life of the metallic film capacitor are further reduced, and therefore the service life of the metallic film capacitor is prolonged, the failure rate of the metallic film capacitor is reduced, and the metallic film capacitor is used more safely and reliably. In addition, the composite impregnant has lower dielectric loss and a lower thermal expansion coefficient, and is better in thermal stability, and favorable for substantially prolonging the service life of the metallic film capacitor.

Description

technical field [0001] The invention relates to an impregnating agent for metallized film capacitors, in particular to a composite impregnating agent capable of greatly improving the service life of metallized film capacitors and a preparation method thereof. Background technique [0002] At present, the impregnating agents used in metallized film capacitors are generally vegetable oils such as castor oil and salad oil, or mineral oils such as methyl silicone oil and benzyl silicone oil. The biggest disadvantage of simply using oil as the impregnant for metallized film capacitors is that the oil will inevitably contain some water, and during the use of metallized film capacitors, the water will gradually penetrate into the capacitor core, causing metal The Zn-Al metal layer on the surface layer of the polypropylene film of the thin film capacitor dissolves, falls off or oxidizes, which causes the capacity of the capacitor to decay quickly or even easily decays and fails, and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01G4/22H01G13/04
Inventor 周定毅匡永正赵志明
Owner WUXI HONGGUANG CAPACITOR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap