CN109817409A - A kind of magnetic elements and preparation method thereof with field homogeneity distribution characteristics internal under running conditions - Google Patents
A kind of magnetic elements and preparation method thereof with field homogeneity distribution characteristics internal under running conditions Download PDFInfo
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- CN109817409A CN109817409A CN201711171187.1A CN201711171187A CN109817409A CN 109817409 A CN109817409 A CN 109817409A CN 201711171187 A CN201711171187 A CN 201711171187A CN 109817409 A CN109817409 A CN 109817409A
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Abstract
The present invention relates to a kind of under running conditions with the magnetic elements and preparation method thereof of internal magnetic field uniform distribution features, the outer layer powder core of high magnetic permeability is preset in mold, then it is squeezed into mold cavity after being heated using the method that heating squeezes in the low magnetic permeability material of flow-like and pressure-maintaining and heat-preservation certain time solidifies binder, it is formed to have using central point as the multi-layer annular from inside to outside in axle center after demoulding and be combined closely the soft magnetic-powder core of structure, continued the coiling on this composite magnetic powder core and obtain corresponding magnetic elements.The magnetic elements used magnetic material is ring-shaped, and structure feature is to combine closely by the multi-layer annular from inside to outside in axle center of central point, such as circular ring shape, oval ring, hollow rectangle etc..There is the features such as fever is uniform, direct current biasing characteristic good, long service life using the magnetic elements of this method production.
Description
Technical field
The present invention relates to a kind of magnetic elements production methods, and in particular to a kind of internal with magnetic field under running conditions
The magnetic elements of uniform distribution features, the invention further relates to the production methods of the magnetic elements, belong to electronic component and add
Work field shaping technique.
Background technique
Magnetic elements have become original part crucial in power electronics design as the critical component of modern DC power supply
One of, principle is the variation in coil the generation magnetic field and magnetic field under conditions of having electric current load using iron core periphery,
To generate the variation of magnetic induction intensity and magnetic induction intensity in core interior, energy is realized while iron core completes energy storage
Orderly transmitting, thus for load stable rated current is provided.Core material is usually ferrite and metal soft magnetic powder core,
Common metal soft magnetic powder core has permalloy powder core, ferrocart core, Fe-Si-Al magnetic core, iron silicon powder core and amorphous magnetic powder
Core.Ferrocart core has the feature of low price, high loss, is adapted only to work at a lower frequency；Permalloy is by adjusting composition
Can get two kinds of powder cores, price highest in common metal soft magnetic-powder core, one kind is MPP, and another kind is HighFlux, point
Not Ju You high-frequency low-consumption and high saturated magnetic induction feature, but its is at high price so that increasingly tending in industry
The suitable Fe-Si-Al magnetic core of cost performance or iron silica magnetic particle core are selected, there is low-loss feature appropriate and appropriate in high frequency
Saturation induction density, have become the main product in market now.It is high that the appearance of Fe-based amorphous powder core illustrates its collection
The excellent performance of saturation induction density and low-loss feature, but main product can not be become due to various reasons.
The above metal soft magnetic powder core is usually circular ring shape, hollow rectangle etc. as the electric induction used time, is twined in its entity part
Around copper coil to become magnetic elements.Such magnetic elements iron core adjacent on the inside of coil under the conditions of alive
Make its magnetic induction intensity of the material of the position higher with respect to the magnetic induction intensity of other positions since the length of magnetic path is small；Conversely,
Material of such inductance under the conditions of alive on the outside of iron core is since length of magnetic path length is so that its magnetic strength of the material of the position
It answers intensity lower with respect to the magnetic induction intensity of other positions, therefore causes the deterioration of direct current biasing characteristic and the inductance hair of inductance
Phenomena such as hot uneven.
Summary of the invention
The purpose of the present invention is to provide have field homogeneity distribution characteristics inside a kind of magnetic material under running conditions
Magnetic elements production method, the object of the invention is also to provide it is a kind of using production method of the present invention prepare magnetism
Component, magnetic induction intensity is uniformly distributed and slows down phenomena such as inductance fever is uneven the magnetic elements at work.
The object of the present invention is achieved like this:
A kind of magnetic elements and preparation method thereof under running conditions with internal magnetic field uniform distribution features, by high magnetic conductance
The outer layer powder core of rate is preset in mold, is in the low magnetic permeability material of flow-like after being then heated using the method that heating squeezes
It is squeezed into mold cavity and pressure-maintaining and heat-preservation certain time solidifies binder, being formed after demoulding has using central point as axle center
Multi-layer annular from inside to outside combine closely the soft magnetic-powder core of structure, continue the coiling on this composite magnetic powder core obtain it is corresponding
Magnetic elements.
Preferred embodiment, the magnetic elements are by axle center of central point and inside is hollow symmetrical structure.
Preferred embodiment, the magnetic elements structure solid section is by three layers more than two layers (containing two layers) fitting closely
(containing three layers) is constituted below, and monolayer material initial permeability gradually increases from inside to outside.
Preferred embodiment specifically includes following forming step:
1) preparation of low magnetic permeability magnetic composite: weighing a certain amount of binder and corresponding diluent to be made into binder molten
Liquid；Then the metal powder material and binder solution are mixed and stirred for until being sufficiently mixed uniformly；
2) extrusion forming: the outer layer powder core of high magnetic permeability is formed in mold in advance, will be above-mentioned heated using the method that heating squeezes
Being squeezed into heat-insulation pressure keeping certain time in mold cavity at the pelletizing of fluid afterwards solidifies bonding agent, and being formed after demoulding has
Double-deck or three-decker soft magnetic-powder core；
3) coiling: magnetic elements are made in coiling on above-mentioned double-deck or three-decker the soft magnetic-powder core.
Preferred embodiment, the binder include organic adhesive or modified inorganic bonding agent, such as epoxy-resin systems glue
Tie one of agent, modified cyanate rouge resin system binder, phenolic resin system binder and more than one hybrid adhesives.
Preferred embodiment, the outermost material be permalloy ribbon-wound core, amorphous and amorphous nano-crystalline ribbon-wound core, with
The initial permeability of upper magnetic material is between 500-100000.
Preferred embodiment, the high magnetic permeability outer layer powder core can select MPP powder core, HighFlux powder core, Sendust
(Fe-Si-Al magnetic core), iron silica magnetic particle core and amorphous powder core, the initial permeability of the above magnetic material is between 26-500.
Preferred embodiment, the internal layer low magnetic permeability material can select permalloy soft-magnetic alloy powder, FeSi3.5-6.5、
FeCr3.5-6.5Si3.5-6.5, the soft magnetic metal powders and binder etc. such as amorphous iron be made by mixing made of magnetic composite, it is above
The initial permeability of magnetic material is between 5-18.
Preferred embodiment, the internal layer low magnetic permeability material have flowing thixotropy between 50-180 DEG C；The internal layer is low
Magnetoconductivity material can extrude molding under the extruding force of 0.1-10MPa.
Preferred embodiment, the forming temperature is between 50-200 DEG C；The dwell time is between 1-300 seconds.
Another object of the present invention is to protect the magnetic elements based on preparing using production method of the invention, interior
Portion's Magnetic Induction Density Distribution is uniform, and device has the characteristics that generate heat uniform, direct current biasing characteristic good, long service life.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages:
(1) outer layer uses high magnetic permeability magnetic composite, and the beam magnetic energy power for increasing iron core can be effectively sealing off magnetic circuit, subtract
Few leakage field；
(2) internal layer is acted on using low magnetic permeability magnetic composite with outer layer magnetic composite simultaneously, is made in magnetic elements
The Magnetic Induction Density Distribution in portion is uniform, and direct current biasing characteristic is good；
(3) according to the above, the magnetic elements inside magnetic induction intensity of this method preparation is evenly distributed, and device has fever equal
The characteristics of even, direct current biasing characteristic good, long service life.
Detailed description of the invention
Attached drawing 1 is magnetic elements structural schematic diagram prepared by the embodiment of the present invention one.
Attached drawing 2 is magnetic elements structural schematic diagram prepared by the embodiment of the present invention two.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is described in further details.
Embodiment one, it is a kind of under running conditions with the magnetic elements of internal magnetic field uniform distribution features, such as attached drawing 1
It is shown.
(1) prepared by low magnetic permeability metal magnetic composite material
The outermost layer magnetic material of magnetic elements is in permalloy ribbon-wound core, amorphous and amorphous nano-crystalline ribbon-wound core
One kind, the initial permeability of the above magnetic material is between 501-100000；Middle layer magnetic material is the magnetic core of high magnetic permeability
Powder, can be in MPP magnetic core powder, HighFlux magnetic core powder (sendust core powder), iron silicon magnetic core powder and amorphous magnetic core powder
One kind, the initial permeability of the above magnetic material is between 26-500；Innermost layer magnetic material is permalloy, FeSi3.5-6.5、
FeCr3.5-6.5Si3.5-6.5, the soft magnetic metal powders and binder, filler etc. such as amorphous iron be made by mixing made of low magnetic permeability magnetic
Property composite material, the initial permeability of the above magnetic composite is between 5-18.Low magnetic permeability soft magnetic metal powder cannot be straight
It connects for extrusion forming, surface treatment must be carried out to it and is mixed with to obtain the magnetic of low magnetic permeability with binder, filler etc.
Property composite material.
(2) extrusion forming
Low magnetic permeability magnetic composite obtains soft magnetic-powder core after extrusion forming.Specific step is as follows: by outermost layer band around
Magnetic material is placed in the mold with certain temperature, then the outer layer powder core of high magnetic permeability is preset in mold and outermost layer band
Fitted closely around magnetic material, the method then squeezed under the extruding force between 0.1-10MPa using heating will it is heated after at
The low magnetic permeability material of flow-like is squeezed into grinding tool type chamber, and pressure-maintaining and heat-preservation 1-300 seconds under the conditions of 50-200 DEG C of temperature makes
Bonding agent solidification, forms the soft magnetic-powder core with three-decker after demoulding.
(3) coiling
Corresponding magnetic elements are obtained by coiling on composite magnetic powder core made from extrusion forming or winding above-mentioned.
Since the magnetic conductivity of composite magnetic powder core has the characteristics that gradually increase from inside to outside, the magnetic elements using this method preparation have
Have the advantages that fever is uniform, direct current biasing characteristic is gentle, the inductance service life extends.
Embodiment two, it is a kind of under running conditions with the magnetic elements of internal magnetic field uniform distribution features, such as 2 institute of attached drawing
Show.
(1) prepared by low magnetic permeability metal magnetic composite material
The outer layer magnetic material of magnetic elements is the magnetic core powder of high magnetic permeability, can be MPP magnetic core powder, HighFlux magnetic core
One of powder (sendust core powder), iron silicon magnetic core powder and amorphous magnetic core powder, the initial permeability of the above magnetic material exists
Between 26-500；Internal layer magnetic material is permalloy, FeSi3.5-6.5、FeCr3.5-6.5Si3.5-6.5, the soft magnetic metals such as amorphous iron
Low magnetic permeability magnetic composite made of powder and binder, filler etc. are made by mixing, the above magnetic composite just
Beginning, magnetic conductivity was between 5-18.Low magnetic permeability soft magnetic metal powder cannot be directly used to extrusion forming, must carry out at surface to it
It manages and is mixed with to obtain the magnetic composite of low magnetic permeability with binder, filler etc..
(2) extrusion forming
Low magnetic permeability magnetic composite obtains soft magnetic-powder core after extrusion forming.Specific step is as follows: by high magnetic permeability
Outer layer powder core is preset in the mold with certain temperature, is then squeezed under the extruding force between 0.1-10MPa using heating
Method will it is heated after be squeezed into grinding tool type chamber at the low magnetic permeability material of flow-like, and protected under the conditions of 50-200 DEG C of temperature
Pressure heat preservation solidifies bonding agent in 1-300 seconds, and the soft magnetic-powder core with three-decker is formed after demoulding.
(3) coiling
Corresponding magnetic elements are obtained by coiling on composite magnetic powder core made from extrusion forming or winding above-mentioned.
Since the magnetic conductivity of composite magnetic powder core has the characteristics that gradually increase from inside to outside, the magnetic elements using this method preparation have
Have the advantages that fever is uniform, direct current biasing characteristic is gentle, the inductance service life extends.
Claims (11)
1. a kind of magnetic elements and preparation method thereof with field homogeneity distribution characteristics internal under running conditions, feature
It is: the outer layer powder core of high magnetic permeability is preset in mold, is in flow-like after being then heated using the method that heating squeezes
Low magnetic permeability material be squeezed into mold cavity and pressure-maintaining and heat-preservation certain time solidifies binder, being formed after demoulding has
It combines closely the soft magnetic-powder core of structure, continues on this composite magnetic powder core using central point as the multi-layer annular from inside to outside in axle center
Coiling obtains corresponding magnetic elements.
2. a kind of magnetic elements with field homogeneity distribution characteristics internal under running conditions according to claim 1
And preparation method thereof, it is characterised in that: the magnetic elements are by axle center of central point and inside is hollow symmetrical structure.
3. a kind of magnetism member with field homogeneity distribution characteristics internal under running conditions according to claim 1 or 2
Device and preparation method thereof, it is characterised in that: the magnetic elements structure solid section (contains two by two layers fitted closely
Layer) more than three layers (contain three layers) constitute below, monolayer material initial permeability gradually increases from inside to outside.
4. a kind of magnetic elements with field homogeneity distribution characteristics internal under running conditions according to claim 1
And preparation method thereof, it is characterised in that: specifically include following forming step:
1) preparation of low magnetic permeability magnetic composite: weighing a certain amount of binder and corresponding diluent to be made into binder molten
Liquid；Then the metal powder material and binder solution are mixed and stirred for until being sufficiently mixed uniformly；
2) extrusion forming: the outer layer powder core of high magnetic permeability is formed in mold in advance, will be above-mentioned heated using the method that heating squeezes
Being squeezed into heat-insulation pressure keeping certain time in mold cavity at the pelletizing of fluid afterwards solidifies bonding agent, and being formed after demoulding has
Double-deck or three-decker soft magnetic-powder core；
3) coiling: magnetic elements are made in coiling on above-mentioned double-deck or three-decker the soft magnetic-powder core.
5. a kind of magnetic elements with field homogeneity distribution characteristics internal under running conditions according to claim 4
And preparation method thereof, it is characterised in that: the binder includes organic adhesive or modified inorganic bonding agent, such as epoxy resin
One of system binder, modified cyanate rouge resin system binder, phenolic resin system binder and more than one mixing
Binder.
6. a kind of magnetic elements with field homogeneity distribution characteristics internal under running conditions according to claim 4
And preparation method thereof, it is characterised in that: the outermost material be permalloy ribbon-wound core, amorphous and amorphous nano crystal zone around
Iron core, the initial permeability of the above magnetic material is between 500-100000.
7. a kind of magnetic elements with field homogeneity distribution characteristics internal under running conditions according to claim 4
And preparation method thereof, it is characterised in that: the high magnetic permeability outer layer powder core can select MPP powder core, HighFlux powder core,
Sendust(Fe-Si-Al magnetic core), iron silica magnetic particle core and amorphous powder core, the initial permeability of the above magnetic material is in 26-
Between 500.
8. a kind of magnetic elements with field homogeneity distribution characteristics internal under running conditions according to claim 4
And preparation method thereof, it is characterised in that: the internal layer low magnetic permeability material can select permalloy soft-magnetic alloy powder,
FeSi3.5-6.5、FeCr3.5-6.5Si3.5-6.5, magnetism made of the soft magnetic metal powders and binder etc. such as amorphous iron are made by mixing it is multiple
Condensation material, the initial permeability of the above magnetic material is between 5-18.
9. a kind of magnetic elements with field homogeneity distribution characteristics internal under running conditions according to claim 8
And preparation method thereof, it is characterised in that: the internal layer low magnetic permeability material has flowing thixotropy between 50-180 DEG C；It is described
Internal layer low magnetic permeability material can extrude molding under the extruding force of 0.1-10MPa.
10. a kind of first device of magnetism with field homogeneity distribution characteristics internal under running conditions according to claim 8
Part and preparation method thereof, it is characterised in that: the forming temperature is between 50-200 DEG C；The dwell time is in the 1-300 second
Between.
11. a kind of magnetic elements with field homogeneity distribution characteristics internal under running conditions, it is characterised in that: in utilization
The magnetic elements of any claim the method preparation are stated, internal magnetic induction intensity is evenly distributed, and device has fever equal
The characteristics of even, direct current biasing characteristic good, long service life.
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| CN201711171187.1A CN109817409A (en) | 2017-11-22 | 2017-11-22 | A kind of magnetic elements and preparation method thereof with field homogeneity distribution characteristics internal under running conditions |
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| CN201711171187.1A CN109817409A (en) | 2017-11-22 | 2017-11-22 | A kind of magnetic elements and preparation method thereof with field homogeneity distribution characteristics internal under running conditions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112435822A (en) * | 2020-11-05 | 2021-03-02 | 青岛云路先进材料技术股份有限公司 | Preparation method of high-efficiency Fe-Si-Al magnetic powder core and prepared Fe-Si-Al magnetic powder core |
| CN113692078A (en) * | 2021-07-08 | 2021-11-23 | 华南理工大学 | Curing system and method for magnetic composite material |
| CN114905679A (en) * | 2021-09-24 | 2022-08-16 | 厦门环寂高科有限公司 | Magnetic hysteresis flexible sound insulation board and manufacturing method thereof |
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| US5364253A (en) * | 1992-05-14 | 1994-11-15 | Matsushita Electric Industrial Co., Ltd. | Magnetic circuit component molding device |
| CN1688003A (en) * | 2005-06-23 | 2005-10-26 | 安泰科技股份有限公司 | Anti-DC component current transformer core and mfg. method and use thereof |
| CN102610370A (en) * | 2012-03-07 | 2012-07-25 | 天通控股股份有限公司 | Composite soft magnetic core for resisting electromagnetic interference |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112435822A (en) * | 2020-11-05 | 2021-03-02 | 青岛云路先进材料技术股份有限公司 | Preparation method of high-efficiency Fe-Si-Al magnetic powder core and prepared Fe-Si-Al magnetic powder core |
| CN113692078A (en) * | 2021-07-08 | 2021-11-23 | 华南理工大学 | Curing system and method for magnetic composite material |
| CN114905679A (en) * | 2021-09-24 | 2022-08-16 | 厦门环寂高科有限公司 | Magnetic hysteresis flexible sound insulation board and manufacturing method thereof |
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Application publication date: 20190528 |