A preparation process of an anti-DC transformer core

The invention relates to a technology for a DC transformer and a preparation process, which is applied in the field of preparation technology of an iron core of an anti-DC transformer, and can solve the problems of decreasing the equivalent magnetic permeability, affecting the fairness and justice of electric energy measurement, etc., so as to reduce the use error and improve the yield of finished products. and stability, the effect of enhancing the use effect

Active Publication Date: 2021-01-29
ANHUI SHENGLONG ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The low-voltage current transformer is used for the current ratio conversion of the electric energy metering device of the low-voltage power user. It is composed of an iron core, a coil and an insulating material. It can only accurately measure the sine wave current of 50Hz and the degree of distortion <5%.
The load nature of power users in today's society is developing toward diversification. Some of the user's loads contain a large amount of DC components or even half-wave DC loads. The current transformer is affected by the DC component of the half-wave current, and the iron core is close to the saturation area. The decrease of the conductivity makes the error of the current transformer move to the negative direction, resulting in an error of -30% to -70% of the current transformer in the half-wave DC state, which seriously affects the fairness and justice of electric energy measurement

Method used

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  • A preparation process of an anti-DC transformer core

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Embodiment 1

[0025] A preparation process of an anti-DC transformer iron core, the preparation process of the DC transformer iron core comprises the following steps:

[0026] (1) Material selection: select raw materials in the following weight percentages: 2% niobium, 1% cobalt, 2% nano-graphene, 5% nickel, 1% zinc, 0.8% gallium, 2% tin oxide, 0.8% silicon dioxide, 0.2% lead trioxide, the rest is iron;

[0027] (2) Mixing materials: mix iron with tin oxide, silicon dioxide, and dilead trioxide in a smelting furnace for high-temperature melting and smelting at 1580°C for 45 minutes, then add niobium, cobalt, nickel, zinc, and gallium to vacuumize To a vacuum degree of 500-800Pa, and smelting at a high temperature of 2100°C for 50 minutes, a mixed metal liquid is obtained for use;

[0028] (3) Ingot casting: pour the above mixed metal liquid at a temperature of 1650°C, and then cool it down to room temperature at a rate of 40°C / min to obtain an ingot;

[0029] (4) Remelting: melt the above...

Embodiment 2

[0033] A preparation process of an anti-DC transformer iron core, the preparation process of the DC transformer iron core comprises the following steps:

[0034] (1) Material selection: select raw materials in the following weight percentages: 4% niobium, 2% cobalt, 3.5% nano-graphene, 8% nickel, 2% zinc, 1.4% gallium, 3% tin oxide, 1.4% silicon dioxide, 0.4% lead trioxide, the rest is iron;

[0035] (2) Mixing materials: mix iron with tin oxide, silicon dioxide, and dilead oxide in a smelting furnace for high-temperature melting and smelting at 1640°C for 60 minutes, then add niobium, cobalt, nickel, zinc, and gallium to vacuumize To a vacuum degree of 500-800Pa, and smelting at a high temperature of 2200 ° C for 80 minutes, a mixed metal liquid is obtained for use;

[0036] (3) Ingot casting: pour the above mixed metal liquid at a temperature of 1750°C, and then cool it down to room temperature at a rate of 60°C / min to obtain an ingot;

[0037] (4) Remelting: melt the abov...

Embodiment 3

[0041] A preparation process of an anti-DC transformer iron core, the preparation process of the DC transformer iron core comprises the following steps:

[0042] (1) Material selection: select the following raw materials in weight percentage: 3% niobium, 1.5% cobalt, 3% nano-graphene, 7% nickel, 1.5% zinc, 1.2% gallium, 2.5% tin oxide, 1.2% silicon dioxide, 0.3% lead trioxide, the rest is iron;

[0043] (2) Mixing: mix iron with tin oxide, silicon dioxide, and lead trioxide in a smelting furnace for high-temperature melting and smelting at 1610°C for 50 minutes, then add niobium, cobalt, nickel, zinc, and gallium to vacuumize To a vacuum degree of 500-800Pa, and smelting at a high temperature of 2150°C for 65 minutes, a mixed metal liquid is obtained for use;

[0044] (3) Ingot casting: pour the above mixed metal liquid at a temperature of 1700°C, and then cool it down to room temperature at a rate of 50°C / min to obtain an ingot;

[0045](4) Remelting: melt the above-mention...

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Abstract

The invention provides a preparation process of an anti-DC transformer iron core, and relates to the technical field of current transformer magnetic core processing. The preparation process of the anti-DC transformer core mainly includes: material selection, material mixing, ingot casting, remelting, magnetic core preparation, heat treatment and other steps. The invention overcomes the disadvantages of the prior art, improves the electromagnetic induction intensity of the iron core of the traditional transformer, reduces the influence of the error of the DC component, improves the yield and stability of the product, and improves the economic benefit.

Description

technical field [0001] The invention relates to the technical field of current transformer magnetic core processing, in particular to a preparation process of an anti-DC transformer core. Background technique [0002] With the increasing popularity of electronic equipment and the development of high-frequency miniaturization and integration, as an important supporting component of the electronic information industry, the application field of magnetic cores is gradually expanding. The expansion of various emerging fields has put forward higher performance requirements for magnetic components such as magnetic cores - higher saturation magnetic induction and frequency of use, and relatively lower power loss. [0003] The low-voltage current transformer is used for the current ratio conversion of the electric energy metering device of the low-voltage power user. It is composed of an iron core, a coil and an insulating material. It can only accurately measure the sine wave curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/01H01F41/02C22C38/12C22C38/10C22C38/08C22C33/04B22D11/06C21D6/00C21D9/00
CPCB22D11/0611C21D6/001C21D9/0068C22C33/04C22C38/002C22C38/08C22C38/10C22C38/12H01F1/01H01F41/0206H01F41/022H01F41/0226
Inventor 潘超
Owner ANHUI SHENGLONG ELECTRIC
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