Dry-type transformer and reactor casting process

A technology of dry-type transformers and reactors, which is applied in the manufacture of inductors/transformers/magnets, circuits, and electrical components. Economic loss and other issues, to achieve the effect of improving package performance, reducing partial discharge of products, and improving production efficiency

Inactive Publication Date: 2012-08-01
NINGXIA YINLI ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high viscosity of epoxy resin and the complex structure of some products, even after centrifugal casting, the effect is not ideal. As a result, the technical indicators such as voltage resistance performance and partial discharge of the cast product cannot meet the requirements, resulting in waste products. , causing great economic losses to the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] First, put the assembled transformers, reactors and other products that need to be poured with epoxy resin into the corresponding casting molds, and fix the transformers, reactors and other products on the bottom plate of the mold with silica gel, and place them at room temperature for 4-10 hours. After the silica gel is cured, put it in an oven to continue curing; the curing time and temperature in the oven vary according to the size, shape and process conditions of the product, the curing time is 2-6 hours, and the curing temperature is 80-100°C. After curing, take the mold out of the oven, cool it to room temperature, pour epoxy resin into the product in the mold according to the design requirements, and then put the mold into a pressurized tank at a temperature of 35-40°C, pressure In the state of 0.5-0.6Mpa, after 2-3 hours until the epoxy resin is completely cured, take out the mold, and then do relevant tests after demoulding, and the products that pass the test a...

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PUM

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Abstract

The invention relates to the manufacture of both a transformer and a reactor, in particular to a dry-type transformer and reactor casting process. The casting process comprises the steps of fixing, curing, casting, pressurizing, heating and testing, and products successfully passing the test are accepted products. The invention has the characteristics that firstly, as epoxy resin is cured in the positive pressure state, that the epoxy resin can wrap the products according to the design requirements is effectively ensured, the voltage resisting strength of the products is improved, meanwhile, the partial discharge of the products is remarkably reduced, and the appearances of the products are improved; secondly, as the epoxy resin is cured in constant-temperature state, setting can be performed according to the optimal curing temperature of the adopted epoxy resin, on one hand, the wrapping performance of the epoxy resin to the products is improved, on the other hand, the curing time is effectively shortened, and the qualification rate and the production efficiency of the products are greatly improved.

Description

technical field [0001] The invention relates to the manufacture of transformers and reactors, in particular to the pouring process of dry-type transformers and reactors. Background technique [0002] At present, in order to prolong product life, improve voltage resistance, reduce partial discharge, and increase product safety, dry-type transformers and reactors are generally produced by epoxy resin casting. The common ones are normal pressure casting and Centrifugal pouring two processes. However, due to the high viscosity of epoxy resin and the complex structure of some products, even after centrifugal casting, the effect is not ideal. As a result, the technical indicators such as voltage resistance performance and partial discharge of the cast product cannot meet the requirements, resulting in waste products. , causing great economic losses to the enterprise. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/00B29C39/10
Inventor 韩小军冯贵
Owner NINGXIA YINLI ELECTRICAL CO LTD
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