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A solidification production process of ultramicrocrystalline magnetic cores for current transformers

A technology of current transformer and production process, which is applied in the field of solidification production process of ultra-microcrystalline magnetic core for current transformer, can solve the problems of large shrinkage stress, decreased magnetic core performance, high hardness and strength, etc., and achieves simplified operation steps. Effect

Active Publication Date: 2020-09-08
HEBEI SHENKE ELECTRONICS CO LTD +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional magnetic core varnish curing mostly uses epoxy resin as the raw material, which has a large shrinkage stress, high hardness and strength after curing, and it is easy to cause the magnetic core to be stressed and cause performance degradation.

Method used

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  • A solidification production process of ultramicrocrystalline magnetic cores for current transformers
  • A solidification production process of ultramicrocrystalline magnetic cores for current transformers
  • A solidification production process of ultramicrocrystalline magnetic cores for current transformers

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Experimental program
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Effect test

Embodiment 2

[0033] Example 2, the model specification of the ultramicrocrystalline magnetic core is selected as 16 / 21*10, and the HT35 magnetic core tester is used before and after dipping, and the input current is set to 3mA and the output voltage value is recorded in order to obtain the original core performance test. Data, as shown in Table 3;

[0034] table 3

[0035]

[0036]

[0037] It can be seen from Table 3 that the average decline rate of the magnetic core performance data before and after curing is 4%, which is 30% lower than the current common process, and the performance of the cured magnetic core by the application process is improved by about 26%.

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Abstract

The invention discloses a curing production process of an ultra-microcrystalline magnetic core for a current transformer, and belongs to the technical field of magnetic material preparation. In the process, a modified heat-resistant unsaturated polyester resin and styrene are used as raw materials and evenly mixed according to the ratio to obtain mixed glue liquid, the ultra-microcrystalline magnetic core is dipped in the mixed glue liquid after the heat treatment and dip coating, after the magnetic core is immersed, the magnetic core is placed in a normal temperature and ventilated state forstanding, and finally, the magnetic core is placed in a constant temperature blast drying box and subjected to heating with constant temperature for curing. The magnetic core has simple curing operation and high production efficiency, the compounded glue liquid can be stored for a long time without repeated compounding, and mass production can be easily achieved.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a solidification production process of an ultramicrocrystalline magnetic core for a current transformer. Background technique [0002] Ultramicrocrystalline magnetic cores are generally made by heat treatment after winding amorphous thin strips, and are often used to replace Permalloy to make current transformers. The amorphous strip begins to become brittle due to structural relaxation and other reasons during heat treatment, and its toughness is poor. When subjected to external force, the magnetic core is fragile, and the soft magnetic performance decreases. Inaccurate. At present, in order to solve the fragility of the magnetic core, there are two methods to avoid external force collisions. One is to use a protective box with a corresponding shape for protection, and the other is to immerse and cure the protection treatment. The traditional magnetic co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F41/00B05D3/02
CPCB05D3/0254B05D2508/00H01F41/005H01F41/0226
Inventor 贺宏伟王聪王悦壮耿秋生
Owner HEBEI SHENKE ELECTRONICS CO LTD
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