CN104217832B - Composite magnetic material for photovoltaic inverter and preparation method thereof - Google Patents
Composite magnetic material for photovoltaic inverter and preparation method thereof Download PDFInfo
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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
The invention belongs to the field of magnetic material of photovoltaic DC-to-AC converter, it is related to a kind of magnetic material and preparation method thereof, especially
It is to be related to a kind of photovoltaic DC-to-AC converter composite magnetic and preparation method thereof.
Background technology
Inverter is a kind of power adjusting device being made up of semiconductor devices, is mainly used in direct current power to change and strikes a bargain
Stream electric power.Typically it is made up of boosting loop and inversion bridge type return.Boosting loop is the dc voltage boost of solar cell to inverse
Become the DC voltage needed for device output control；Inversion bridge type return is then equivalently converted into conventional frequency the DC voltage after boosting
The alternating voltage of rate.Inverter is mainly made up of switch elements such as transistors, by allowing switch element repeat on-off regularly
(on-off) direct current input, is made to become exchange output.
Magnetic material has larger purposes in photovoltaic DC-to-AC converter, the performance of the magnetic material normal work to photovoltaic DC-to-AC converter
Make that there is large effect.Photovoltaic DC-to-AC converter has larger requirement to the electromagnetic performance of magnetic material at work.
Content of the invention
Technical problem to be solved: the electromagnetic performance of the magnetic material that conventional photovoltaic DC-to-AC converter is adopted is poor, such as interior
Report coercivity more low, limit the problem of use in photovoltaic DC-to-AC converter for the magnetic material.
Technical scheme: the invention discloses a kind of photovoltaic DC-to-AC converter composite magnetic, described photovoltaic DC-to-AC converter is used
Composite magnetic includes following component: fe, cu, la, dy, nb, ba, sr, mn, sc, cr.
Preferably, described photovoltaic DC-to-AC converter is formed according to percentage by weight with composite magnetic following component:
Cu be 3.8wt%～6.5wt%,
La be 0.2wt%～0.5wt%,
Dy be 0.1wt%～0.3wt%,
Nb be 0.4wt%～0.8wt%,
Ba be 0.3wt%～0.6wt%,
Sr be 0.3wt%～1wt%,
Mn be 0.6wt%～1.2wt%,
Sc be 0.3wt%～0.9wt%,
Cr be 0.05wt%～0.2wt%,
Balance of fe.
It is further preferred that described photovoltaic DC-to-AC converter composite magnetic following component is according to percentage by weight group
Become:
Cu be 5.2wt%,
La be 0.3wt%,
Dy be 0.3wt%,
Nb be 0.6wt%,
Ba be 0.5wt%,
Sr be 0.7wt%,
Mn be 0.9wt%,
Sc be 0.9wt%,
Cr be 0.2wt%,
Balance of fe.
A kind of preparation method of photovoltaic DC-to-AC converter composite magnetic, comprises the following steps:
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, its
The percentage by weight of middle each element be respectively cu be 3.8wt%～6.5wt%, la be 0.2wt%～0.5wt%, dy be 0.1wt%～
0.3wt%, nb be 0.4wt%～0.8wt%, ba be 0.3wt%～0.6wt%, sr be 0.3wt%～1wt%, mn be 0.6wt%～
1.2wt%, sc are 0.3wt%～0.9wt%, cr is 0.05wt%～0.2wt%, balance of fe；
(2) the oxide material mixer of above-mentioned various elements is mixed；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, by the raw material after various mixing
Put into vacuum melting furnace, smelting temperature is 1700 DEG C～1900 DEG C, smelting time is 3h～8h, after melting, fused mass exists
It is cooled to room temperature in mould；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain magnetic powder
End；
(5), after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, obtain photovoltaic inversion and use
Composite magnetic.
Preferably, the preparation method of described a kind of photovoltaic DC-to-AC converter composite magnetic, comprises the following steps:
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, its
The percentage by weight of middle each element is respectively cu
0.5wt%, sr be 0.7wt%, mn be 0.9wt%, sc be 0.9wt%, cr be 0.2wt%, balance of fe；
(2) the oxide material mixer of above-mentioned various elements is mixed；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, by the raw material after various mixing
Put into vacuum melting furnace, smelting temperature is 1850 DEG C, smelting time is 5h, after melting is cooled to fused mass in a mold
Room temperature；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain magnetic powder
End, Magnaglo particle diameter is 5 microns to 8 microns；
(5), after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, obtain photovoltaic inversion and use
Composite magnetic.
A kind of preparation method of described photovoltaic DC-to-AC converter composite magnetic, heats up when melting ingot casting in preparation method
Speed is preferably 80 DEG C/min, and rate of temperature fall is preferably 60 DEG C/min.
A kind of preparation method of described photovoltaic DC-to-AC converter composite magnetic, when in preparation process, mould is compressing
Temperature is preferably 900 DEG C～1300 DEG C.
By adding tri- kinds of compositions of dy, nb, sc in the composite magnetic of photovoltaic DC-to-AC converter, and its content is entered
Go rational screening, effectively raise the related electromagnetic performance of the composite magnetic of photovoltaic DC-to-AC converter.
Beneficial effect: the photovoltaic DC-to-AC converter composite electromagnetic material being prepared by the preparation method of the present invention, in it
Report coercivity in 2577ka/m to 2734ka/m, its magnetic energy product is in 399kj/m3To 425kj/m3.Temperature is the present invention at 25 DEG C
The saturation flux density of magnetic material is in 562mt to 578mt.There is very good electromagnetic performance, go for photovoltaic inverse
Become the operating efficiency improving photovoltaic DC-to-AC converter in device.
Specific embodiment
Embodiment 1
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, its
The percentage by weight of middle each element is respectively cu
0.5wt%, sr be 0.7wt%, mn be 0.9wt%, sc be 0.9wt%, cr be 0.2wt%, balance of fe；
(2) oxide of above-mentioned various elements is carried out mechanical mixture with material mixer, mix all mixed to all raw materials
Close uniformly；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, by the raw material after various mixing
Put into vacuum melting furnace, smelting temperature is 1850 DEG C, smelting time is 5h, after melting is cooled to fused mass in a mold
Room temperature, heating rate is 80 DEG C/min, and rate of temperature fall is 60 DEG C/min；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain magnetic powder
End, Magnaglo particle diameter is 5 microns；
(5), after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, press temperature is 900
DEG C, compressing after obtain photovoltaic inversion composite magnetic.
The HCJ of the photovoltaic DC-to-AC converter composite magnetic that embodiment 1 prepares is 2734ka/m, its magnetic
Energy product is 425kj/m3.Temperature is the saturation flux density of the magnetic material of the present invention at 25 DEG C is 578mt.
Embodiment 2
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, its
The percentage by weight of middle each element is respectively cu
0.6wt%, sr be 1wt%, mn be 0.7wt%, sc be 0.3wt%, cr be 0.1wt%, balance of fe；
(2) oxide of above-mentioned various elements is carried out mechanical mixture with material mixer, mix all mixed to all raw materials
Close uniformly；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, by the raw material after various mixing
Put into vacuum melting furnace, smelting temperature is 1700 DEG C, smelting time is 6h, after melting is cooled to fused mass in a mold
Room temperature, heating rate is 80 DEG C/min, and rate of temperature fall is 60 DEG C/min；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain magnetic powder
End, Magnaglo particle diameter is 7 microns；
(5), after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, press temperature is 900
DEG C, compressing after obtain photovoltaic inversion composite magnetic.
The HCJ of the photovoltaic DC-to-AC converter composite magnetic that embodiment 2 prepares is 2654ka/m, its magnetic
Energy product is 399kj/m3.Temperature is the saturation flux density of the magnetic material of the present invention at 25 DEG C is 562mt.
Embodiment 3
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, its
The percentage by weight of middle each element is respectively cu
0.3wt%, sr be 0.5wt%, mn be 0.6wt%, sc be 0.6wt%, cr be 0.05wt%, balance of fe；
(2) oxide of above-mentioned various elements is carried out mechanical mixture with material mixer, mix all mixed to all raw materials
Close uniformly；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, by the raw material after various mixing
Put into vacuum melting furnace, smelting temperature is 1800 DEG C, smelting time is 4h, after melting is cooled to fused mass in a mold
Room temperature, heating rate is 80 DEG C/min, and rate of temperature fall is 60 DEG C/min；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain magnetic powder
End, Magnaglo particle diameter is 8 microns；
(5), after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, press temperature is 900
DEG C, compressing after obtain photovoltaic inversion composite magnetic.
The HCJ of the photovoltaic DC-to-AC converter composite magnetic that embodiment 3 prepares is 2577ka/m, its magnetic
Energy product is 402kj/m3.Temperature is the saturation flux density of the magnetic material of the present invention at 25 DEG C is 565mt.
Embodiment 4
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, its
The percentage by weight of middle each element is respectively cu
0.4wt%, sr be 0.3wt%, mn be 1.2wt%, sc be 0.7wt%, cr be 0.1wt%, balance of fe；
(2) oxide of above-mentioned various elements is carried out mechanical mixture with material mixer, mix all mixed to all raw materials
Close uniformly；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, by the raw material after various mixing
Put into vacuum melting furnace, smelting temperature is 1900 DEG C, smelting time is 8h, after melting is cooled to fused mass in a mold
Room temperature, heating rate is 80 DEG C/min, and rate of temperature fall is 60 DEG C/min；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain magnetic powder
End, Magnaglo particle diameter is 6 microns；
(5), after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, press temperature is 900
DEG C, compressing after obtain photovoltaic inversion composite magnetic.
The HCJ of the photovoltaic DC-to-AC converter composite magnetic that embodiment 4 prepares is 2587ka/m, its magnetic
Energy product is 405kj/m3.Temperature is the saturation flux density of the magnetic material of the present invention at 25 DEG C is 564mt.
Embodiment 5
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, its
The percentage by weight of middle each element is respectively cu
0.5wt%, sr be 0.8wt%, mn be 0.9wt%, sc be 0.4wt%, cr be 0.2wt%, balance of fe；
(2) oxide of above-mentioned various elements is carried out mechanical mixture with material mixer, mix all mixed to all raw materials
Close uniformly；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, by the raw material after various mixing
Put into vacuum melting furnace, smelting temperature is 1800 DEG C, smelting time is 3h, after melting is cooled to fused mass in a mold
Room temperature, heating rate is 80 DEG C/min, and rate of temperature fall is 60 DEG C/min；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain magnetic powder
End, Magnaglo particle diameter is 8 microns；
(5), after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, press temperature is 900
DEG C, compressing after obtain photovoltaic inversion composite magnetic.
The HCJ of the photovoltaic DC-to-AC converter composite magnetic that embodiment 5 prepares is 2615ka/m, its magnetic
Energy product is 407kj/m3.Temperature is the saturation flux density of the magnetic material of the present invention at 25 DEG C is 567mt.
Comparative example
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, ba, sr, mn, cr, wherein each element
Percentage by weight is respectively cu
0.2wt%, balance of fe；
(2) oxide of above-mentioned various elements is carried out mechanical mixture with material mixer, mix all mixed to all raw materials
Close uniformly；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, by the raw material after various mixing
Put into vacuum melting furnace, smelting temperature is 1800 DEG C, smelting time is 3h, after melting is cooled to fused mass in a mold
Room temperature, heating rate is 80 DEG C/min, and rate of temperature fall is 60 DEG C/min；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain magnetic powder
End, Magnaglo particle diameter is 8 microns；
(5), after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, press temperature is 900
DEG C, compressing after obtain photovoltaic inversion composite magnetic.
The HCJ of the photovoltaic DC-to-AC converter composite magnetic that comparative example prepares is 2125ka/m, its magnetic energy
Amass as 336kj/m3.Temperature is the saturation flux density of the magnetic material of the present invention at 25 DEG C is 483mt.
Claims (5)
1. a kind of photovoltaic DC-to-AC converter composite magnetic it is characterised in that described photovoltaic DC-to-AC converter composite magnetic by
Following component forms according to percentage by weight:
Cu be 3.8wt%～6.5wt%,
La be 0.2wt%～0.5wt%,
Dy be 0.1wt%～0.3wt%,
Nb be 0.4wt%～0.8wt%,
Ba be 0.3wt%～0.6wt%,
Sr be 0.3wt%～1wt%,
Mn be 0.6wt%～1.2wt%,
Sc be 0.3wt%～0.9wt%,
Cr be 0.05wt%～0.2wt%,
Balance of fe；
A kind of described photovoltaic DC-to-AC converter composite magnetic is prepared by following preparation methods:
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, wherein respectively
The percentage by weight of element be respectively cu be 3.8wt%～6.5wt%, la be 0.2wt%～0.5wt%, dy be 0.1wt%～
0.3wt%, nb be 0.4wt%～0.8wt%, ba be 0.3wt%～0.6wt%, sr be 0.3wt%～1wt%, mn be 0.6wt%～
1.2wt%, sc are 0.3wt%～0.9wt%, cr is 0.05wt%～0.2wt%, balance of fe；
(2) the oxide material mixer of above-mentioned various elements is mixed；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, the raw material after various mixing is put into
To vacuum melting furnace, smelting temperature is 1700 DEG C～1900 DEG C, and smelting time is 3h～8h, by fused mass in mould after melting
In be cooled to room temperature；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain Magnaglo；
(5) after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, obtain photovoltaic inversion with compound
Magnetic material.
2. a kind of photovoltaic DC-to-AC converter composite magnetic according to claim 1 is it is characterised in that described photovoltaic is inverse
Become device composite magnetic to be made up of according to percentage by weight following component:
Cu be 5.2wt%,
La be 0.3wt%,
Dy be 0.3wt%,
Nb be 0.6wt%,
Ba be 0.5wt%,
Sr be 0.7wt%,
Mn be 0.9wt%,
Sc be 0.9wt%,
Cr be 0.2wt%,
Balance of fe.
3. a kind of photovoltaic DC-to-AC converter composite magnetic according to claim 1 is it is characterised in that comprise the following steps:
(1) prepare the raw material of composite magnetic, take the oxide of fe, cu, la, dy, nb, ba, sr, mn, sc, cr, wherein respectively
The percentage by weight of element be respectively cu be 5.2wt%, la be 0.3wt%, dy be 0.3wt%, nb be 0.6wt%, ba be 0.5wt%,
Sr be 0.7wt%, mn be 0.9wt%, sc be 0.9wt%, cr be 0.2wt%, balance of fe；
(2) the oxide material mixer of above-mentioned various elements is mixed；
(3) raw material of the composite magnetic mixing is carried out melting ingot casting, the raw material after various mixing is put into
To vacuum melting furnace, smelting temperature is 1850 DEG C, and smelting time is 5h, and fused mass is cooled to after melting room in a mold
Temperature；
(4) ingot casting after cooling is carried out Mechanical Crushing, carry out ultra micro air-flow crushing after Mechanical Crushing again and obtain Magnaglo, magnetic
Property powder diameter be 5 microns to 8 microns；
(5) after ultra micro air-flow crushing, the Magnaglo after pulverizing is carried out mould more compressing, obtain photovoltaic inversion with compound
Magnetic material.
4. a kind of photovoltaic DC-to-AC converter composite magnetic according to claim 1 is it is characterised in that melt in preparation method
Melting heating rate during ingot casting is 80 DEG C/min, and rate of temperature fall is 60 DEG C/min.
5. a kind of photovoltaic DC-to-AC converter composite magnetic according to claim 1 is it is characterised in that preparation process middle mold
When having compressing, temperature is 900 DEG C～1300 DEG C.
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| CN108164261A (en) * | 2018-01-23 | 2018-06-15 | 合肥华盖光伏科技有限公司 | A kind of photovoltaic transformer magnetic material and preparation method thereof |
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| KR101214210B1 (en) * | 2009-11-18 | 2012-12-20 | 나노씨엠에스(주) | High energy response powder and ink composition comprising the same |
| CN103903825A (en) * | 2012-12-28 | 2014-07-02 | 比亚迪股份有限公司 | Preparation method of neodymium iron boron permanent magnet material |
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| CN101240392A (en) * | 2007-02-07 | 2008-08-13 | 有研稀土新材料股份有限公司 | Rare earth alloy |
| CN102173767A (en) * | 2011-01-17 | 2011-09-07 | 临沂中瑞电子有限公司 | Magnetic material for photovoltaic inverter |
| CN102509602A (en) * | 2011-11-21 | 2012-06-20 | 宁波市展发磁业科技有限公司 | High-performance magnetic material |
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