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Manufacturing method of nanocrystalline magnetic core for high-frequency electrostatic dust collection power transformer

A technology for power transformers and electrostatic precipitators, applied in the manufacture of inductors/transformers/magnets, transformers/inductor cores, circuits, etc., can solve problems such as high prices, achieve low cost, reduce loss and cost, and meet high frequency requirements Effect

Inactive Publication Date: 2014-12-10
BEIJING YEKE MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the nanocrystalline magnetic core can only be imported from Germany VAC, which is expensive

Method used

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  • Manufacturing method of nanocrystalline magnetic core for high-frequency electrostatic dust collection power transformer
  • Manufacturing method of nanocrystalline magnetic core for high-frequency electrostatic dust collection power transformer
  • Manufacturing method of nanocrystalline magnetic core for high-frequency electrostatic dust collection power transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Follow the steps below in turn:

[0022] a. A 170*270*60*60 rectangular nanocrystalline magnetic core is made by winding an iron-based nanocrystalline ribbon with a thickness of 24 μm, a width of 60 mm, and a lamination factor of 70%;

[0023] b. Using a vacuum heat treatment furnace, the rectangular nanocrystalline magnetic core is subjected to two-stage heat preservation heat treatment without magnetic field annealing and inert gas (nitrogen) protection. The first stage temperature is 450°C, and the heat preservation is 90min; then the temperature is raised to 520°C, and the heat preservation is 90min. ; natural cooling;

[0024] c. Vacuum impregnation is used to impregnate the cooled rectangular nanocrystalline magnetic core with epoxy resin. The vacuum degree is 0.7Mpa. After impregnation, the strips of the rectangular nanocrystalline magnetic core are evenly covered with epoxy resin film;

[0025] d. Use a high-temperature oven to cure the rectangular nanocrystall...

Embodiment 2

[0027] Follow the steps below in turn:

[0028] a. A 160*270*50*50 rectangular nanocrystalline magnetic core is made by winding an iron-based nanocrystalline ribbon with a thickness of 23 μm, a width of 50 mm, and a lamination factor of 73 percent;

[0029] b. Using a vacuum heat treatment furnace, the rectangular nanocrystalline magnetic core is subjected to two-stage heat preservation heat treatment without magnetic field annealing and inert gas protection. The first stage temperature is 470°C, heat preservation for 75min; the second stage temperature is 530°C, heat preservation for 75min; natural cooling;

[0030] c. Use vacuum impregnation method to impregnate the cooled rectangular nanocrystalline magnetic core with epoxy resin, the vacuum degree is 0.8Mpa, after impregnation, the rectangular nanocrystalline magnetic core strips are evenly covered with epoxy resin film;

[0031] d. Use a high-temperature oven to cure the rectangular nanocrystalline magnetic core impregnat...

Embodiment 3

[0033] Follow the steps below in turn:

[0034] a. A 150*280*40*40 rectangular nanocrystalline magnetic core is made by winding an iron-based nanocrystalline ribbon with a thickness of 22 μm, a width of 40 mm, and a lamination factor of 75%;

[0035] b. Using a vacuum heat treatment furnace, the rectangular nanocrystalline magnetic core is subjected to two-stage heat preservation heat treatment without magnetic field annealing and inert gas protection. The first stage temperature is 450 ° C, heat preservation 60 minutes; the second stage temperature is 550 ° C, heat preservation 60 minutes; natural cooling;

[0036] c. Vacuum impregnation method is used to impregnate the cooled rectangular nanocrystalline magnetic core with epoxy resin, the vacuum degree is 0.6Mpa, and the strip layer of the rectangular nanocrystalline magnetic core after impregnation is evenly covered with epoxy resin film;

[0037] d. Use a high-temperature oven to cure the rectangular nanocrystalline magnet...

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Abstract

The invention discloses a manufacturing method of a nanocrystalline magnetic core for a high-frequency electrostatic dust collection power transformer. The manufacturing method sequentially comprises the following steps that an iron-based nanocrystalline band is adopted to be wound into the rectangular nanocrystalline magnetic core, the thickness of the iron-based nanocrystalline band is smaller than 25 micrometers, the width of the iron-based nanocrystalline band is 40 mm to 60 mm, and the lamination factor is larger than or equal to 70 percent; two stages of heat preservation heat treatment of magnetic-field-free annealing and inert gas shielding are carried out on the rectangular nanocrystalline magnetic core, the temperature of the first stage is 450 DEG C to 480 DEG C, heat preservation is carried out for 60 min to 90 min, the temperature of the second stage is 520 DEG C to 550 DEG C, and heat preservation is carried out for 60 min to 90 min; natural cooling is carried out; epoxy resin immersion treatment is carried out on the cooled rectangular nanocrystalline magnetic core in a vacuum impregnation mode, and the vacuum degree is 0.6 Mpa to 0.8 Mpa; the rectangular nanocrystalline magnetic core immersed in epoxy resin is cured through a three-stage heat preservation method, the temperature of the first stage is 80 DEG C, heat preservation is carried out for 60 min to 90 min, the temperature of the second stage is 120 DEG C, heat preservation is carried out for 120 min, the temperature of the third stage is 150 DEG C to 160 DEG C, and heat preservation is carried out for 120 min; natural cooling is carried out.

Description

technical field [0001] The invention belongs to the technical field of transformer magnetic cores, in particular to a preparation method of a nanocrystalline magnetic core for a high-frequency electrostatic precipitator power transformer. Background technique [0002] High-frequency electrostatic precipitator mainly uses high-voltage direct current to supply power to the corona electrode and the dust collection electrode, forming an electric field between the two electrodes, and the flue gas dust is ionized under the action of the electric field, and the charged dust is deposited on the dust collection electrode and the corona electrode , by vibrating the two poles, the purpose of dust collection is achieved. The circuit principle is to input power frequency current, adjust it to DC through the rectifier circuit, and then pass through the inverter circuit to form a high-frequency current with a frequency of 20KHz, step up the voltage through a high-frequency high-voltage tra...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F27/25
Inventor 王天宁张翠梅何钢李丽娜朱志强王伟张宝珠
Owner BEIJING YEKE MAGNETIC MATERIAL
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