CN108133801A - A kind of integrally-formed inductor and preparation method thereof - Google Patents
A kind of integrally-formed inductor and preparation method thereof Download PDFInfo
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- CN108133801A CN108133801A CN201711349411.1A CN201711349411A CN108133801A CN 108133801 A CN108133801 A CN 108133801A CN 201711349411 A CN201711349411 A CN 201711349411A CN 108133801 A CN108133801 A CN 108133801A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/255—Magnetic cores made from particles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/005—Impregnating or encapsulating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
Abstract
The invention discloses a kind of integrally-formed inductors and preparation method thereof, and including magnetic substance and copper core, air gap is provided in the middle part of magnetic substance, and copper core surface is provided with temperature-resistant insulation layer, and are wrapped in magnetic substance and form copper core coil；Inductance of the present invention has the superior characteristics such as size is small, magnet density is high, thickness is thin, RDC is low, saturation current is high, and inductance is suitable for mass production, and electromagnetic performance is stablized.
Description
Technical field
The present invention relates to a kind of integrally-formed inductors and preparation method thereof, belong to inductors technique field.
Background technology
With increasing, the constantly improve innovation of Internet technology of global electronic consumer products, consumer electronics production
The update speed of product is constantly accelerated, and the power inductance class product in conventional electronics is also having larger innovation to need now
It asks, traditional inductance element is formed by coiling gluing, and middle noise is big, power consumption is high, quality factor is poor there is using for itself,
The shortcomings of meeting generation environment pollutes, has aggravated the production cost of product significantly during gluing；Traditional gluing power inductance magnet
Density is smaller, usually 5.6g/cm^3；Traditional power inductance is also constantly by other substitution threats in market, such as
Packaging inductance, but packaging inductance can not avoid the problem that gap exists in itself, and inductance is caused to generate the defects of power consumption is big.
Invention content
The technical problem to be solved by the present invention is to：A kind of integrally-formed inductor and preparation method thereof is provided, it is made
Inductance has the superior characteristics such as size is small, magnet density is high, thickness is thin, RDC is low, saturation current is high, and inductance is suitble to batch raw
Production, and electromagnetic performance is stablized, to solve problems of the prior art.
The technical solution that the present invention takes is：A kind of integrally-formed inductor, including magnetic substance and copper core, magnetic substance middle part
Air gap is provided with, copper core surface is provided with temperature-resistant insulation layer, and is wrapped in magnetic substance and forms copper core coil.
A kind of production method of integrally-formed inductor, this method include the following steps：
(1) it is 100 according to weight part ratio by magnetic powder and liquid-state silicon gel:1~20 mixing, and add the boron of proportional quantity
Acid, weight account for the 5%~20% of total weight, 1h~2h are stirred in planetary ball machine, by the powder after stirring 90 DEG C~130
0.5h~2h is toasted under the conditions of DEG C, is ground after baking, powder is filtered out by sieve；
(2) powder screened in step (1) is suppressed：Pelletizing is subjected to first time filling, winds the line of coil
Circle jig in press die and carries out tangent line in being pushed by manipulator, and the process of coil jig tangent line carries out first time compacting,
After coil jig completes compacting disengaging machine, polyurethane film is implanted into, machine carries out second of powder packed and simultaneously suppresses；
(3) the inductance surface that compacting is completed in step (2) is subjected to blasting treatment, is sprayed after the completion of sandblasting in magnet surface
Liquid nano silicon solution keeps the temperature 1h~2h, by the green body after heat treatment in the case where temperature is 200 DEG C~300 DEG C of heat treatment condition
1h~2h is heat-treated under using 200~400 DEG C and inert atmosphere conditions, integrated inductance is made.
Preferably, the air gap left in inductance after polyurethane film sintering in above-mentioned steps (2).
Preferably, above-mentioned steps (2) coil is heat safe insulated copper wire, and the ingredient of enamel-cover film is included containing metallic hydrogen
One or more of barium monoxide and the epoxy resin of copper oxide mixture, phenolic resin, thickness are 4um~10um；Enamel-cover film
In ingredient and magnetic powder in boric acid generate a kind of high-temperature resistant membrane at high temperature.
Beneficial effects of the present invention：Compared with prior art, effect of the present invention is as follows：
1) inductance made by the method described in the present invention is after magnetic powder is inserted compacting tool set, around making line
In circle and the magnetic powder of polyurethane film implantation and tangent line is carried out, inserting for second magnetic powder is carried out after implantation, has been filled
Second is carried out into rear mold to suppress, then the making of inductance is completed through 500 DEG C~700 DEG C sintering of high temperature, and polyurethane film is in electricity
The gap left in sense is improved the characteristics of inductance superimposed current, the integrated inductance that this method makes have resistance to electric current it is high,
Low-loss, low noise feature.
2) copper wire used in inductance is heat safe insulated copper wire, and enamel-cover film is mainly hydroxide containing metal by ingredient
One or more of barium and the epoxy resin of copper oxide mixture, phenolic resin composition, thickness are 4um~10um；The enamel-cover
The boric acid in ingredient and magnetic powder in film can generate a kind of high-temperature resistant membrane at high temperature, which can be effectively protected copper
Line prevents it by high pressure-temperature short circuit；
3) after the completion of inductance compacting, 1h~2h is toasted under the conditions of 200 DEG C~300 DEG C, is cooled to room temperature after the completion of baking,
Again through temperature to be sintered 1h~2h under 200~400 DEG C and inert atmosphere conditions；Under the heat treatment condition, the intensity of magnet and close
Degree has obtained very big promotion, magnet density in more than 6.0g/cm^3, electromagnetic performance promoted it is also larger, have resistance to current capability it is good,
The advantages of low D.C. resistance；
4) inductance of the present invention has the superior spies such as size is small, magnet density is high, thickness is thin, RDC is low, saturation current is high
Property, inductance is suitable for mass production, and electromagnetic performance is stablized, and has that RDC is low, saturation current is high by the inductance made by the present invention
Etc. superior characteristic, inductance is mainly used for the high current of portable product, high efficiency POL DC-DC circuits, and work(is filtered as energy storage
Energy is common in wearable smart machine, smart mobile phone and tablet computer etc. since its size is small and thickness is thin.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the flow chart of the production method of integrated inductance described in the embodiment of the present invention 1；
Fig. 3 is the flow chart of the production method of integrated inductance described in the embodiment of the present invention 2.
Specific embodiment
Below in conjunction with the accompanying drawings and the present invention is described further in specific embodiment.
Embodiment 1：As shown in Figure 1-Figure 3, a kind of integrally-formed inductor, including magnetic substance 1 and copper core 4, magnetic substance 1
Middle part is provided with air gap 2, and 4 surface of copper core is provided with temperature-resistant insulation layer 3, and is wrapped in magnetic substance 1 and forms copper core coil.
A kind of production method of integrally-formed inductor, this method include the following steps：
(1) it is 100 according to weight part ratio by magnetic powder and liquid-state silicon gel:1~20 mixing, and add the boron of proportional quantity
Acid, weight account for the 5%~20% of total weight, 1h~2h are stirred in planetary ball machine, by the powder after stirring 90 DEG C~130
0.5h~2h is toasted under the conditions of DEG C, is ground after baking, powder is filtered out by sieve；
(2) powder screened in step (1) is suppressed：Pelletizing is subjected to first time filling, winds the line of coil
Circle jig in press die and carries out tangent line in being pushed by manipulator, and the process of coil jig tangent line carries out first time compacting,
After coil jig completes compacting disengaging machine, polyurethane film is implanted into, machine carries out second of powder packed and simultaneously suppresses；
(3) the inductance surface that compacting is completed in step (2) is subjected to blasting treatment, is sprayed after the completion of sandblasting in magnet surface
Liquid nano silicon solution keeps the temperature 1h~2h, by the green body after heat treatment in the case where temperature is 200 DEG C~300 DEG C of heat treatment condition
1h~2h is heat-treated under using 200~400 DEG C and inert atmosphere conditions, integrated inductance is made.
Preferably, the air gap left in inductance after polyurethane film sintering in above-mentioned steps (2).
Preferably, above-mentioned steps (2) coil is heat safe insulated copper wire, and the ingredient of enamel-cover film is included containing metallic hydrogen
One or more of barium monoxide and the epoxy resin of copper oxide mixture, phenolic resin, thickness are 4um~10um；Enamel-cover film
In ingredient and magnetic powder in boric acid generate a kind of high-temperature resistant membrane at high temperature.
Embodiment 2：According to weight ratio it is 100 by magnetic powder and liquid-state silicon gel:2~9 mixing, and add a certain amount of boron
Acid, weight ratio are 5%~20%, 1h~2h are stirred in planetary ball machine, after batch mixing is uniform, by the powder 90 DEG C~130
1h~2h is toasted under the conditions of DEG C, is ground after baking, powder is filtered out by sieve, is chosen between 80~250 mesh screens
Powder；By pelletizing carry out for the first time be packed into mold, around make coil and polyurethane film implantation magnetism powder in simultaneously
Tangent line is carried out, carries out inserting for second magnetic powder after implantation, filling completes rear mold and carry out second to suppress, then through temperature
1h~2h is sintered under the conditions of being 250 DEG C, microwave agglomerating furnace progress can be used, sintering process is unsuitable long, and the time, which grown, to cause
Copper wire can not be resistant to high temperature and be carbonized；Sintered inductance will coat insulating materials, it acts as antirust and improve the exhausted of magnet
Edge impedance；It will metallize after the completion of coating, it acts as the electrode tips for making inductance.
Embodiment 3：The powder technique used in the present embodiment and consistent in embodiment 1, press in the manufacturing process of inductance
It will be suppressed twice, pelletizing is subjected to first time filling, coil jig is pushed by the help of manipulator in press die
And tangent line is carried out, the process of coil jig tangent line is completed to suppress for the first time, after jig completion compacting is detached from machine, is filled by assisting
It puts and is implanted into polyurethane film, machine carries out second of powder packed and suppresses；Inductance compacting is completed rear surface and is carried out at sandblasting
Reason sprays liquid nano silicasol liquid after the completion of sandblasting in magnet surface, in the case where temperature is 200 DEG C~300 DEG C of heat treatment condition
1h~2h is kept the temperature, the green body after heat treatment is heat-treated 1h~2h under the conditions of using 350 DEG C.Sintered inductance will apply
Insulating materials is covered, it acts as antirusts and the insulation impedance of raising magnet；It will metallize after the completion of coating, make inductance
Electrode tip.
Following table makes the electrical data table of inductance for embodiment 1 and embodiment 2
Sample name winding turns inductance (nH) D.C. resistance (m Ω) and superimposed current (A)
| Sample name | Winding turns | Inductance (nH) | D.C. resistance (m Ω) | Superimposed current (A) |
| Market samples | 4.5 | 470 | 14 | 6.7 |
| Embodiment 1 | 4.5 | 470 | 7.5 | 9.5 |
| Embodiment 2 | 4.5 | 470 | 8.5 | 9.5 |
Note：Current value when superimposed current is inductance decline 30%
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in change or replacement, should all contain
Within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims lid.
Claims (4)
1. a kind of integrally-formed inductor, it is characterised in that：Including magnetic substance（1）And copper core（4）, magnetic substance（1）Middle part is set
There is air gap（2）, copper core（4）Surface is provided with temperature-resistant insulation layer（3）, and it is wrapped in magnetic substance（1）Form copper core coil.
2. a kind of production method of integrally-formed inductor according to claim 1, it is characterised in that：This method include with
Lower step：
（1）According to weight part ratio it is 100 by magnetic powder and liquid-state silicon gel:1~20 mixing, and the boric acid of proportional quantity is added, weight
Amount accounts for the 5%~20% of total weight, 1h~2h is stirred in planetary ball machine, by the powder after stirring in 90 DEG C~130 DEG C conditions
Lower baking 0.5h~2h, is ground after baking, the powder between 80~300 mesh is filtered out by sieve；
（2）By step（1）The powder of middle screening is suppressed：Pelletizing is subjected to first time filling, the coil for winding coil is controlled
Tool in manipulator push-in by press die and carrying out tangent line, the process progress first time compacting of coil jig tangent line, coil
After jig completes compacting disengaging machine, polyurethane film is implanted into, machine carries out second of powder packed and simultaneously suppresses；
（3）By step（2）The inductance surface that middle compacting is completed carries out blasting treatment, and liquid is sprayed in magnet surface after the completion of sandblasting
Nano-silicon solution keeps the temperature 1h~2h, by the green body after heat treatment again in the case where temperature is 200 DEG C~300 DEG C of heat treatment condition
By being heat-treated 1h~2h under 200~400 DEG C and inert atmosphere conditions, integrated inductance is made.
3. a kind of integrally-formed inductor according to claim 2 and preparation method thereof, it is characterised in that：Step（2）In
The air gap left in inductance after polyurethane film sintering.
4. a kind of integrally-formed inductor according to claim 2 and preparation method thereof, it is characterised in that：Step（2）In
Coil is heat safe insulated copper wire, and the ingredient of enamel-cover film includes barium hydroxide containing metal and the asphalt mixtures modified by epoxy resin of copper oxide mixture
One or more of fat, phenolic resin, thickness are 4 um~10um；The boric acid in ingredient and magnetic powder in enamel-cover film is in high temperature
A kind of lower high-temperature resistant membrane of generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711349411.1A CN108133801A (en) | 2017-12-15 | 2017-12-15 | A kind of integrally-formed inductor and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711349411.1A CN108133801A (en) | 2017-12-15 | 2017-12-15 | A kind of integrally-formed inductor and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109545505A (en) * | 2018-11-29 | 2019-03-29 | 深圳顺络电子股份有限公司 | A kind of high reliability inductance and preparation method thereof |
| CN110895989A (en) * | 2018-08-23 | 2020-03-20 | 广东理标信息科技有限公司 | Integrally formed inductor and manufacturing method thereof |
| CN111548759A (en) * | 2020-05-18 | 2020-08-18 | 文登卡尔马斯特电子有限公司 | Thermo-reversible adhesive material |
| CN112927929A (en) * | 2021-01-25 | 2021-06-08 | 浙江三钛科技有限公司 | Inductance element and manufacturing method thereof |
| CN112927916A (en) * | 2021-01-25 | 2021-06-08 | 浙江三钛科技有限公司 | Inductance element and manufacturing method thereof |
| CN112927917A (en) * | 2021-01-25 | 2021-06-08 | 浙江三钛科技有限公司 | Inductance element |
| CN112927915A (en) * | 2021-01-25 | 2021-06-08 | 浙江三钛科技有限公司 | Inductance element and manufacturing method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304145A (en) * | 2000-01-12 | 2001-07-18 | Tdk株式会社 | Manufacturing method for coil embedded compressed-core and coil embedded compressed-core |
| JP2008078177A (en) * | 2006-09-19 | 2008-04-03 | Nec Tokin Corp | Inductor |
| CN101323689A (en) * | 2007-06-13 | 2008-12-17 | 日立电线株式会社 | Non-halogen flame retardant resin composition and non-halogen flame retardant electric wire and cable |
| CN101339827A (en) * | 2007-07-05 | 2009-01-07 | 住友电气工业株式会社 | Coaxial cord, manufacturing method thereof, and multi-core coaxial cord |
| CN105349990A (en) * | 2015-12-09 | 2016-02-24 | 深圳市麦捷微电子科技股份有限公司 | Alloy inductor surface treatment material and method |
| CN105940470A (en) * | 2016-05-06 | 2016-09-14 | 深圳顺络电子股份有限公司 | Inductor and manufacturing method thereof |
| CN105940466A (en) * | 2016-04-27 | 2016-09-14 | 深圳顺络电子股份有限公司 | Metal matrix composite wire, power inductor, and preparation methods thereof |
| CN107177811A (en) * | 2017-06-13 | 2017-09-19 | 苏州纳迪微电子有限公司 | A kind of preparation method of metal surface wear-and corrosion-resistant coating |
-
2017
- 2017-12-15 CN CN201711349411.1A patent/CN108133801A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304145A (en) * | 2000-01-12 | 2001-07-18 | Tdk株式会社 | Manufacturing method for coil embedded compressed-core and coil embedded compressed-core |
| JP2008078177A (en) * | 2006-09-19 | 2008-04-03 | Nec Tokin Corp | Inductor |
| CN101323689A (en) * | 2007-06-13 | 2008-12-17 | 日立电线株式会社 | Non-halogen flame retardant resin composition and non-halogen flame retardant electric wire and cable |
| CN101339827A (en) * | 2007-07-05 | 2009-01-07 | 住友电气工业株式会社 | Coaxial cord, manufacturing method thereof, and multi-core coaxial cord |
| CN105349990A (en) * | 2015-12-09 | 2016-02-24 | 深圳市麦捷微电子科技股份有限公司 | Alloy inductor surface treatment material and method |
| CN105940466A (en) * | 2016-04-27 | 2016-09-14 | 深圳顺络电子股份有限公司 | Metal matrix composite wire, power inductor, and preparation methods thereof |
| CN105940470A (en) * | 2016-05-06 | 2016-09-14 | 深圳顺络电子股份有限公司 | Inductor and manufacturing method thereof |
| CN107177811A (en) * | 2017-06-13 | 2017-09-19 | 苏州纳迪微电子有限公司 | A kind of preparation method of metal surface wear-and corrosion-resistant coating |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110895989A (en) * | 2018-08-23 | 2020-03-20 | 广东理标信息科技有限公司 | Integrally formed inductor and manufacturing method thereof |
| CN109545505A (en) * | 2018-11-29 | 2019-03-29 | 深圳顺络电子股份有限公司 | A kind of high reliability inductance and preparation method thereof |
| CN111548759A (en) * | 2020-05-18 | 2020-08-18 | 文登卡尔马斯特电子有限公司 | Thermo-reversible adhesive material |
| CN112927929A (en) * | 2021-01-25 | 2021-06-08 | 浙江三钛科技有限公司 | Inductance element and manufacturing method thereof |
| CN112927916A (en) * | 2021-01-25 | 2021-06-08 | 浙江三钛科技有限公司 | Inductance element and manufacturing method thereof |
| CN112927917A (en) * | 2021-01-25 | 2021-06-08 | 浙江三钛科技有限公司 | Inductance element |
| CN112927915A (en) * | 2021-01-25 | 2021-06-08 | 浙江三钛科技有限公司 | Inductance element and manufacturing method thereof |
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