Special encapsulating cushion block for dry-type electronic transformer

Abstract

The invention discloses a special encapsulating cushion block for a dry-type electronic transformer. The cushion block is prepared from a high-molecular compound by use of a lathe, wherein the high-molecular compound is formed by performing high-temperature curing on the mixture of E-39-D epoxy resin, 600-mesh active silica powder and methyl tetrahydrophthalic anhydride; the size of the cushion block is matched with the specification of the electronic transformer. The special encapsulating cushion block for the dry-type electronic transformer is capable of overcoming the defects of the prior art such as easily formed cracks and projections, poor appearance, low reliability and the like, and has the advantages that cracks and projections are not easy to form, the appearance is attractive and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of vacuum potting, in particular to a special potting pad for dry-type electronic transformers. Background technique [0002] Vacuum potting is an indispensable part of dry-type electronic transformers. In order to ensure that the coils are in the required position in the transformer, potting pads of different specifications are often used to pad the coils. [0003] Most of the currently used potting pads are made of rigid materials with less cold and heat shrinkage such as bakelite sticks and ceramics. Due to the difference in cold and heat shrinkage between the pad and the potting material, after the electronic transformer is solidified, there will be tiny cracks around the pad, and protrusions will form on the surface of the transformer, which will affect the appearance of the transformer. [0004] During the process of realizing the present invention, the inventors found that there are at least defects ...

AI Technical Summary

Problems solved by technology

Due to the difference in thermal shrinkage between the pad and the potting material, after the electronic transformer is cured, there will be tiny cracks around the pad, and protrusions will form on the surface of the transformer, which will affect the appearance of the transformer.

[0004] In the process of realizing the present invention, the inventor found that there are at least defects such as easy cracks and protrusions, poor appearance and low reliability in the prior art