Manufacturing method of pulse resistant surge voltage insulating lacquer

A surge voltage and manufacturing method technology, applied in the direction of organic insulators, etc., can solve the problems of large surface energy of nanoparticles, easy agglomeration, difficult primary particle coating, etc., achieve wide application and improve the ability to withstand pulse surge voltage , Excellent technical performance and service life effect

Inactive Publication Date: 2005-12-14
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large surface energy of nanoparticles and easy agglomeration, especially the nanopowder particles obtained by high-temperature calcination have been partially agglomerated or sintered, it is difficult to implement primary particle coating with general technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 100g of anatase-type titanium dioxide with an average grain size of 10.6nm, add it to 400g of deionized water, stir to make a slurry, and add 98ml of titanium dioxide slurry with a concentration of 1mol / LAl 2 (SO 4 ) 3 solution, heated to 70±0.2°C, 157ml of NaAc solution with a concentration of 1mol / L was added dropwise while stirring, and the dropwise addition was completed within 30 minutes. After 1 hour of heat preservation, the temperature was raised to 80±0.2°C. After 1 hour of heat preservation, it was filtered and washed until ready to use. BaCl 2 Check no SO 4 2- , the filter cake was dried at 120° C., and then heat-treated at 300° C. for 2 hours to obtain nanometer titania / alumina composite particles coated with 10 wt % alumina. Weigh 100g of nano-titanium dioxide / alumina composite particles, add it to 400ml of deionized water, heat up to 100°C, add 2g of sodium laurate, keep it warm for 2 hours, cool to 50°C, then filter, dry the filter cake at 100°C...

Embodiment 2

[0025] With the anatase titanium dioxide having an average grain size of 30.5nm as the nucleus, the method in Example 1 is adopted to prepare nanometer titanium dioxide / alumina composite particles coated with 10wt% alumina, and then coated with 2g of sodium laurate to obtain Nanocomposite particles with multilayer structure. The enameled wire varnish was prepared by the same method as in Example 1 and coated into an enameled wire, and its pulse surge voltage resistance life was about 40h.

Embodiment 3

[0027] Taking the α-phase iron oxide with an average grain size of 32.5nm as the nucleus, adopt the method in Example 1 to prepare nano-iron oxide / alumina composite particles coated with 10wt% alumina, and then coat 2g of sodium laurate to obtain Nanocomposite particles with a multilayer structure. The enameled wire varnish was prepared by the same method as in Example 1 and coated into an enameled wire, and its pulse surge voltage resistance life was about 22 hours.

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Abstract

The invention relates to a method for manufacturing an insulating material resistant to pulse surge voltage, which is characterized in that it uses a nano-composite particle with a multi-layer structure as an additive, and the composite particle uses a nano-scale semiconductor oxide as a core material. One or more than one other types of oxides are also deposited on the surface, and then coated with one or more organic substances. The nanocomposite particle with multi-layer structure is evenly dispersed in insulating resin, insulating plastic or insulating rubber to make an insulating material with resistance to pulse surge voltage.

Description

technical field [0001] The invention relates to a manufacturing method of a pulse surge voltage-resistant insulating varnish with a nano-multilayer structure composite material as an additive, and belongs to the field of nano-new technical materials. Background technique [0002] As we all know, variable frequency speed regulating motor has advantages that traditional motors do not have, such as more efficient, more accurate, more energy-saving and simple maintenance, etc., and has become a major development direction of the electromechanical industry. However, the application of frequency conversion technology will cause premature damage to the insulation material of the electromagnetic enameled wire. The reason is that when the inverter is used, the current in the motor has the characteristics of high overshoot voltage, high frequency, and fast pulse rising speed, which will cause partial discharge, space charge accumulation, and heating of the insulating medium, resulting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/18
Inventor 施利毅马寒冰张剑平
Owner SHANGHAI UNIV
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