Composite magnetic material for photovoltaic inverter and preparation method thereof

A technology of composite magnetic materials and photovoltaic inverters, applied in the direction of magnetic materials, inductor/transformer/magnet manufacturing, magnetic objects, etc., can solve problems such as poor electromagnetic properties, low intrinsic coercive force, and limited use of magnetic materials. Achieve the effect of improving work efficiency and good electromagnetic performance

Active Publication Date: 2014-12-17
江苏北斗绿迅新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problems to be solved: The magnetic properties of magnetic materials used in conventional photovoltaic inv

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) The raw materials for preparing composite magnetic materials are oxides of Fe, Cu, La, Dy, Nb, Ba, Sr, Mn, Sc, Cr, wherein the weight percentage of each element is 5.2wt% for Cu and 5.2wt% for La. 0.3wt%, Dy is 0.3wt%, Nb is 0.6wt%, Ba is 0.5wt%, Sr is 0.7wt%, Mn is 0.9wt%, Sc is 0.9wt%, Cr is 0.2wt%, and the balance is Fe ;

[0047] (2) Mechanically mix the oxides of the above-mentioned various elements with a material mixer until all raw materials are mixed evenly;

[0048] (3) Melt and cast the uniformly mixed composite magnetic material raw materials, put all kinds of uniformly mixed raw materials into the vacuum melting furnace, the melting temperature is 1850°C, and the melting time is 5h. Cool to room temperature, the heating rate is 80°C / min, and the cooling rate is 60°C / min;

[0049] (4) Mechanically crush the cooled ingot, and then perform ultra-fine airflow crushing to obtain magnetic powder, the particle size of which is 5 microns;

[0050] (5) After ...

Embodiment 2

[0053] (1) The raw materials for preparing composite magnetic materials are oxides of Fe, Cu, La, Dy, Nb, Ba, Sr, Mn, Sc, Cr, wherein the weight percentage of each element is 3.8wt% for Cu and 3.8wt% for La. 0.5wt%, Dy is 0.1wt%, Nb is 0.5wt%, Ba is 0.6wt%, Sr is 1wt%, Mn is 0.7wt%, Sc is 0.3wt%, Cr is 0.1wt%, and the balance is Fe;

[0054] (2) Mechanically mix the oxides of the above-mentioned various elements with a material mixer until all raw materials are mixed evenly;

[0055] (3) Melt and cast the uniformly mixed composite magnetic material raw materials, put all kinds of uniformly mixed raw materials into the vacuum melting furnace, the melting temperature is 1700°C, and the melting time is 6h. Cool to room temperature, the heating rate is 80°C / min, and the cooling rate is 60°C / min;

[0056] (4) Mechanically crush the cooled ingot, and then perform ultra-fine airflow crushing to obtain magnetic powder, the particle size of which is 7 microns;

[0057] (5) After ultr...

Embodiment 3

[0061] (1) The raw materials for preparing composite magnetic materials are oxides of Fe, Cu, La, Dy, Nb, Ba, Sr, Mn, Sc, Cr, wherein the weight percentage of each element is 5.5wt% for Cu and 5.5wt% for La. 0.3wt%, Dy 0.2wt%, Nb 0.4wt%, Ba 0.3wt%, Sr 0.5wt%, Mn 0.6wt%, Sc 0.6wt%, Cr 0.05wt%, the balance is Fe ;

[0062] (2) Mechanically mix the oxides of the above-mentioned various elements with a material mixer until all raw materials are mixed evenly;

[0063] (3) Melt and cast the uniformly mixed composite magnetic material raw materials, put all kinds of uniformly mixed raw materials into the vacuum melting furnace, the melting temperature is 1800°C, and the melting time is 4h. Cool to room temperature, the heating rate is 80°C / min, and the cooling rate is 60°C / min;

[0064] (4) Mechanically crush the cooled ingot, and then perform ultra-fine airflow crushing to obtain magnetic powder, the particle size of which is 8 microns;

[0065] (5) After ultrafine airflow pulver...

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Abstract

The invention relates to a composite magnetic material for a photovoltaic inverter. The composite magnetic material for the photovoltaic inverter consists of the following ingredients in percentage by weight: 3.8 weight percent to 6.5 weight percent of Cu, 0.2 weight percent to 0.5 weight percent of La, 0.1 weight percent to 0.3 weight percent of Dy, 0.4 weight percent to 0.8 weight percent of Nb, 0.3 weight percent to 0.6 weight percent of Ba, 0.3 weight percent to 1 weight percent of Sr, 0.6 weight percent to 1.2 weight percent of Mn, 0.3 weight percent to 0.9 weight percent of Sc, 0.05 weight percent to 0.2 weight percent of Cr and the balance of Fe. A preparation method of the composite magnetic material comprises the steps of raw material mixing, fusing and ingot casting, mechanical crushing and die forming. The prepared composite magnetic material for the photovoltaic inverter has high intrinsic coercive field, magnetic energy product and saturation magnetic flux density.

Description

technical field [0001] The invention belongs to the field of magnetic materials for photovoltaic inverters, and relates to a magnetic material and a preparation method thereof, in particular to a composite magnetic material for photovoltaic inverters and a preparation method thereof. Background technique [0002] An inverter is a power adjustment device composed of semiconductor devices, which is mainly used to convert DC power into AC power. It is generally composed of a boost circuit and an inverter bridge circuit. The boost circuit boosts the DC voltage of the solar battery to the DC voltage required for inverter output control; the inverter bridge circuit converts the boosted DC voltage into an AC voltage of common frequency equivalently. The inverter is mainly composed of switching elements such as transistors. By regularly turning the switching elements on and off (ON-OFF), the DC input becomes an AC output. [0003] Magnetic materials are widely used in photovoltai...

Claims

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Application Information

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IPC IPC(8): H01F1/057H01F1/059H01F41/00C22C38/26C22C33/04C22C33/02
Inventor 刘平蔡振中
Owner 江苏北斗绿迅新能源科技有限公司
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