CN105914008A - Large current power inductor and manufacture method thereof - Google Patents
Large current power inductor and manufacture method thereof Download PDFInfo
- Publication number
- CN105914008A CN105914008A CN201610235886.7A CN201610235886A CN105914008A CN 105914008 A CN105914008 A CN 105914008A CN 201610235886 A CN201610235886 A CN 201610235886A CN 105914008 A CN105914008 A CN 105914008A
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- Prior art keywords
- soft magnetism
- core
- magnetic core
- magnetic
- described soft
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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
- H01F27/24—Magnetic cores
-
- 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
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- 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
-
- 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
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
A large current power inductor includes a soft magnet magnetic cap magnetic core, a soft magnet bar-shaped magnetic core, a spacer layer and a conductor. The soft magnet magnetic cap magnetic core therein has a groove with a cross section in a specific shape. The cross section of the soft magnet bar-shaped magnetic core is similar to the cross section of the groove of the soft magnet magnetic cap magnetic core, so that the soft magnet bar-shaped magnetic core can be mounted into the groove in a fitting manner. The soft magnet bar-shaped magnetic core is wrapped with the spacer layer made of non-magnetic material. The spacer layer enables the soft magnet magnetic cap magnetic core not to contact with the soft magnet bar-shaped magnetic core directly. The conductor is disposed between the soft magnet magnetic cap magnetic core and the soft magnet bar-shaped magnetic core and forms an electrode. The soft magnet magnetic cap magnetic core, the soft magnet bar-shaped magnetic core, the spacer layer and the conductor are bonded with each other fixedly with bonding glue. The invention also discloses a corresponding large current power inductor manufacture method. The invention provides the high-performance assembly-type large-current inductor suitable for highly automatic production.
Description
Technical field
The present invention relates to a kind of magnetic electron parts, particularly relate to a kind of big current power inductance and
Its preparation method.
Background technology
Along with the development of semiconductor technology, more than the operating current 50A of single cpu.For to PC
For the DC-DC circuit of power supply, it is desirable to the operating current of the power inductance of its periphery increases the most therewith.
Simultaneously because the requirement of high energy efficiency, the resistance value of inductance also requires that more and more less, to reduce electric current generation
Heat.Simultaneously for the miniaturization of device, the operating frequency of inductance promotes the most therewith, current main flow
Frequency is at 500KHz～1MHz, and common inductance value scope is 50nH～680nH, current existing application with should
The big current power inductance value of circuit is frequently with following two prevailing model:
One is to use whole magnetic core pattern.FT magnetic core or BDS magnetic core are carried out accurate air gap cutting,
After around, conductive winding is penetrated the big current power inductance of formation.
Two is to use bonding magnetic core.It is typically CI magnetic core or EI magnetic core at present.At C magnetic core and I magnetic
The pad using high dimensional accuracy between core, or E magnetic core and I magnetic core adds bonding glue or containing high-strength
Degree, the spheric granules bonding glue of high dimensional accuracy bond.Then in CI core combination gap
Introduce conductive winding and form big current power inductance.
At present all there are bigger technological difficulties in both manufacture crafts:
For whole magnetic core scheme, mainly there are three technological difficulties: the through hole of (1) whole magnetic core
When compressing, mould easy damaged, service life is short；(2) clear size of opening is restricted, for chi
Very little less than 0.2mm time, be difficult to suppress；(3) accurate air gap is when cutting, and process window is narrow,
Production qualification rate is low；
For bonding magnetic core scheme, when main technological difficulties are adhesive glue water cure, it is right to need
Combination interface applies bigger pretightning force.The hardening time of general high temperature glue generally exists
30min～120min,
Apply pretightning force the most for a long time, typically can only semi-automation carry out, automaticity
It is difficult to improve.
Summary of the invention
Present invention is primarily targeted at and overcome the deficiencies in the prior art, it is provided that big current power inductance and
Its preparation method, it is to avoid the difficult point of prior art, it is possible to realize the production of inductance high automaticity,
And improve the quality of inductance and make yield.
For achieving the above object, the present invention is by the following technical solutions:
A kind of big current power inductance, including soft magnetism magnetic cap magnetic core, soft magnetism rod core, wall and
Conductor, the groove having a cross section to be given shape inside described soft magnetism magnetic cap magnetic core, described soft magnetism is bar-shaped
Magnetic core has a cross section to be similar figures with the channel section of described soft magnetism magnetic cap magnetic core, thus described soft magnetism is excellent
Shape magnetic core can load described groove adaptedly, is coated with wall in described soft magnetism rod core, described
Wall is nonmagnetic substance, and described wall makes described soft magnetism magnetic cap magnetic core and described soft magnetism bar-shaped
Magnetic core is not directly contacted with when assembling, and described conductor is placed in described soft magnetism magnetic cap magnetic core and described soft magnetism is bar-shaped
Between magnetic core and form electrode, described soft magnetism magnetic cap magnetic core, described soft magnetism rod core, described interval
Layer and described conductor use bonding glue to be adhesively fixed each other.
Further:
Described conductor is placed between described soft magnetism magnetic cap magnetic core and described wall, or be placed in described between
Between interlayer and described soft magnetism rod core.
Described given shape is isosceles trapezoid.
The height of the channel section of the described cross section of described soft magnetism rod core and described soft magnetism magnetic cap magnetic core
Difference is at more than 0.1mm.
Uniform gap is there is between described soft magnetism magnetic cap magnetic core and described soft magnetism rod core.
The two ends of described groove have the end wall hiding described soft magnetism rod core, and described end wall is near recessed
Groove breach is offered in the position of groove upper limb, and described soft magnetism rod core offers for making described conductor embedding
The mounting groove entered, described conductor is arranged in described mounting groove and the two ends of described conductor lack from described groove
Mouth is drawn and forms the electrode of exposure.
Described groove is the groove of both ends open, and the two ends of described soft magnetism rod core are revealed from described groove
Going out, described conductor extends to the two ends of described soft magnetism rod core the most further from described groove inner bending
It is folded into described soft magnetism rod core on the outer surface of described slot opening, forms the electrode exposed.
Described conductor is flat copper wire, punching press copper strips or single layer multi-strand circular copper wire.
Described wall be shaped as winding shape, wire, sheet or scattered pointing object.
A kind of preparation method making described big current power inductance, including: between described in being coated with
The described soft magnetism rod core of interlayer loads in the described groove of described soft magnetism magnetic cap magnetic core adaptedly, its
Described in wall described soft magnetism magnetic cap magnetic core and described soft magnetism rod core are the most directly connect when assembling
Touching, described conductor is placed between described soft magnetism magnetic cap magnetic core and described soft magnetism rod core and forms electrode,
Use bonding glue by described soft magnetism magnetic cap magnetic core, described soft magnetism rod core, described wall and institute
State conductor to be adhesively fixed each other.
Beneficial effects of the present invention:
Technical scheme is used to have a following advantage:
(1) the processing required precision making magnetic core is substantially reduced, required magnetic core size precision
The most mostly magnetic core producer all can batch steady production；
Gap length between (2) two soft magnetic cores can be protected by the thickness of management and control wall
Card, three is closely to fit together in an assembling process, during follow-up adhesive glue water cure
Without applying pretightning force；
(3) adjustment and the expansion of inductance value are simple, only need to adjust the thickness of wall；
(4) can realize full-automatic batch production, constant product quality is high.
Big current power inductance that the present invention provides and preparation method thereof, it is possible to avoid the difficulty of prior art
Point, it is achieved the production of inductance high automaticity, and improve the quality of inductance and make yield.Especially
It there is provided one can high automated production, high performance assembly type heavy-current inductor.
Accompanying drawing explanation
Fig. 1 a and Fig. 1 b is respectively the exploded perspective view of the present invention big current power a kind of embodiment of inductance
Scheme with assembling.
Fig. 2 a to Fig. 2 d is the schematic cross-section of different conductor position and shape；
Fig. 3 a and Fig. 3 b is the structural representation of the soft magnetism magnetic cap magnetic core of two kinds of embodiments；
Fig. 4 be a kind of embodiment the structural representation of soft magnetism rod core；
Fig. 5 a and Fig. 5 b corresponds to the conductor structure schematic diagram of two kinds of embodiments of Fig. 3 b and Fig. 3 a；
Fig. 6 a to Fig. 6 d is 4 kinds of finished product design sketch of big current power inductive embodiment.
Detailed description of the invention
Hereinafter embodiments of the present invention are elaborated.It is emphasized that the description below is only
It is exemplary rather than in order to limit the scope of the present invention and application thereof.
Refering to Fig. 1 a to Fig. 6 d, in one embodiment, a kind of big current power inductance, including soft
Magnetic magnetic cap magnetic core 1, soft magnetism rod core 4, wall 2 and conductor 3, described soft magnetism magnetic cap magnetic core 1
The groove that inside has a cross section to be given shape, described soft magnetism rod core 4 has a cross section soft with described
The channel section of magnetic magnetic cap magnetic core 1 is similar figures, thus described soft magnetism rod core 4 can fill adaptedly
Entering described groove, be coated with wall 2 in described soft magnetism rod core 4, described wall 2 is non-
Magnetic material, described wall 2 makes described soft magnetism magnetic cap magnetic core 1 and described soft magnetism rod core 4
Being not directly contacted with during assembling, described conductor 3 is placed in described soft magnetism magnetic cap magnetic core 1 and described soft magnetism is bar-shaped
Between magnetic core 4 and form electrode, described soft magnetism magnetic cap magnetic core 1, described soft magnetism rod core 4, described
Wall 2 and described conductor 3 use bonding glue to be adhesively fixed each other.The magnetic conductivity of wall
It is preferably close to space permeability.This heavy-current inductor is as a kind of assembly type inductance, and its inductance value is permissible
Carried out by the thickness of control interval layer 2.
In certain embodiments, described conductor 3 is placed in described soft magnetism magnetic cap magnetic core 1 and described interval
Between layer 2.In further embodiments, described conductor 3 is placed in described wall 2 and described soft
Between magnetic rod core 4.
In a preferred embodiment, described given shape is isosceles trapezoid.
The isosceles trapezoid cross section water table opening of soft magnetism rod core 4 is more than or equal to soft magnetism magnetic cap magnetic core 1
The water table opening in isosceles trapezoid cross section.
In a preferred embodiment, the described cross section of described soft magnetism rod core 4 and described soft magnetism magnetic cap
The height difference of the channel section of magnetic core 1 is at more than 0.1mm.
In a preferred embodiment, between described soft magnetism magnetic cap magnetic core 1 and described soft magnetism rod core 4
There is uniform gap.
See Fig. 1 a, Fig. 1 b, Fig. 3 a, Fig. 5 b and Fig. 6 a, in a kind of concrete preferred embodiment,
The two ends of described groove have the end wall hiding described soft magnetism rod core 4, and described end wall is near groove
Groove breach is offered in the position of upper limb, described soft magnetism rod core 4 offers for making described conductor 3
The mounting groove embedded, described conductor 3 is arranged in described mounting groove and the two ends of described conductor 3 are from institute
State groove breach and draw and formed the electrode of exposure.
See Fig. 3 b, Fig. 5 a and Fig. 6 b, in the preferred embodiment that another kind is concrete, described groove
For the groove of both ends open, the two ends of described soft magnetism rod core are exposed from described groove, described conductor
Extend to the two ends of described soft magnetism rod core from described groove inner bending and be folded into described soft further
Magnetic rod core, on the outer surface of described slot opening, forms the electrode exposed.
In various embodiments, described conductor can be flat copper wire, punching press copper strips or single layer multi-strand
Circular copper wire.
In various embodiments, the shape of described wall can be winding shape, wire, sheet or
Scattered pointing object.
Bonding glue preferred epoxy class or high temperature double-component glue.
Refering to Fig. 1 a to Fig. 6 d, in another kind of embodiment, a kind of make described big current power
The preparation method of inductance, including: the described soft magnetism rod core of described wall will be coated with adaptedly
Loading in the described groove of described soft magnetism magnetic cap magnetic core, wherein said wall makes described soft magnetism magnetic cap
Magnetic core and described soft magnetism rod core are not directly contacted with when assembling, and described conductor is placed in described soft magnetism magnetic cap
Between magnetic core and described soft magnetism rod core and form electrode, use bonding glue by described soft magnetism magnetic cap
Magnetic core, described soft magnetism rod core, described wall and described conductor are adhesively fixed each other.
Make example
Example 1 (single inductance)
(1) copper strips striking out given shape is loaded in soft magnetism magnetic cap magnetic core groove；
(2) in groove, low viscosity epoxy resin glue is clicked and entered；
(3) wall is coated in soft magnetism rod core；
(4) the soft magnetism rod core being coated with wall is pressed in groove；
(5) assembly puts into meshbeltfurnace or baking box solidifies, and obtains final finished after solidification.
Example 2 (inductance row)
(1) copper strips striking out given shape is loaded in each groove of soft magnetism magnetic cap magnetic core；
(2) in each groove, low viscosity epoxy resin glue is clicked and entered；
(3) wall is coated in soft magnetism rod core；
(4) the soft magnetism rod core being coated with wall is pressed in each groove；
(5) assembly puts into meshbeltfurnace or baking box solidifies, and obtains final finished after solidification.
Fig. 6 a to Fig. 6 d shows 4 kinds of example finished product design sketch of big current power inductance.
Above content is that combination is concrete/the most made for the present invention the most specifically
Bright, it is impossible to assert the present invention be embodied as be confined to these explanations.For technology belonging to the present invention
For the those of ordinary skill in field, without departing from the inventive concept of the premise, it can also be to this
The embodiment having described that a bit makes some replacements or modification, and these substitute or variant all should
It is considered as belonging to protection scope of the present invention.
Claims (10)
1. a big current power inductance, it is characterised in that include that soft magnetism magnetic cap magnetic core, soft magnetism are bar-shaped
Magnetic core, wall and conductor, the groove having a cross section to be given shape inside described soft magnetism magnetic cap magnetic core,
Described soft magnetism rod core has a cross section to be similar figures with the channel section of described soft magnetism magnetic cap magnetic core, from
And described soft magnetism rod core can load described groove adaptedly, it is coated with in described soft magnetism rod core
Wall, described wall is nonmagnetic substance, described wall make described soft magnetism magnetic cap magnetic core and
Described soft magnetism rod core assemble time be not directly contacted with, described conductor be placed in described soft magnetism magnetic cap magnetic core and
Between described soft magnetism rod core and form electrode, described soft magnetism magnetic cap magnetic core, the bar-shaped magnetic of described soft magnetism
Core, described wall and described conductor use bonding glue to be adhesively fixed each other.
2. big current power inductance as claimed in claim 1, it is characterised in that described conductor is placed in
Between described soft magnetism magnetic cap magnetic core and described wall, or it is placed in described wall and described soft magnetism rod
Between shape magnetic core.
3. big current power inductance as claimed in claim 1, it is characterised in that described given shape
For isosceles trapezoid.
4. big current power inductance as claimed in claim 1, it is characterised in that described soft magnetism rod
The height difference of the channel section of the described cross section of shape magnetic core and described soft magnetism magnetic cap magnetic core 0.1mm with
On.
5. big current power inductance as claimed in claim 1, it is characterised in that described soft magnetism magnetic
Uniform gap is there is between cap magnetic core and described soft magnetism rod core.
6. the big current power inductance as described in any one of claim 1 to 5, it is characterised in that institute
The two ends stating groove have the end wall hiding described soft magnetism rod core, and described end wall is near groove upper limb
Position offer groove breach, described soft magnetism rod core offers the peace for making described conductor embed
Tankage, described conductor is arranged in described mounting groove and the two ends of described conductor are drawn from described groove breach
And form the electrode of exposure.
7. the big current power inductance as described in any one of claim 1 to 5, it is characterised in that institute
Stating the groove that groove is both ends open, the two ends of described soft magnetism rod core are exposed from described groove, institute
State conductor extend to the two ends of described soft magnetism rod core from described groove inner bending and bend further
To described soft magnetism rod core on the outer surface of described slot opening, form the electrode exposed.
8. the big current power inductance as described in any one of claim 1 to 7, it is characterised in that institute
Stating conductor is flat copper wire, punching press copper strips or single layer multi-strand circular copper wire.
9. the big current power inductance as described in any one of claim 1 to 8, it is characterised in that institute
That states wall is shaped as winding shape, wire, sheet or scattered pointing object.
10. the making of the big current power inductance made as described in any one of claim 1 to 9
Method, it is characterised in that including: the described soft magnetism rod core adaptation of described wall will be coated with
Ground loads in the described groove of described soft magnetism magnetic cap magnetic core, and wherein said wall makes described soft magnetism magnetic
Cap magnetic core and described soft magnetism rod core are not directly contacted with when assembling, and described conductor is placed in described soft magnetism magnetic
Between cap magnetic core and described soft magnetism rod core and form electrode, use bonding glue by described soft magnetism magnetic
Cap magnetic core, described soft magnetism rod core, described wall and described conductor are adhesively fixed each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610235886.7A CN105914008A (en) | 2016-04-15 | 2016-04-15 | Large current power inductor and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610235886.7A CN105914008A (en) | 2016-04-15 | 2016-04-15 | Large current power inductor and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105914008A true CN105914008A (en) | 2016-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610235886.7A Pending CN105914008A (en) | 2016-04-15 | 2016-04-15 | Large current power inductor and manufacture method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111508685A (en) * | 2020-03-30 | 2020-08-07 | 深圳顺络电子股份有限公司 | Plastic mold power inductance element and manufacturing method thereof |
| CN112185666A (en) * | 2020-09-10 | 2021-01-05 | 东莞顺络电子有限公司 | Terminal, assembled inductor and manufacturing method of terminal |
| WO2022063345A3 (en) * | 2021-12-30 | 2022-11-03 | 深圳顺络电子股份有限公司 | Nonlinear inductor and manufacturing method therefor, and non-linear inductor row |
| US12100543B2 (en) | 2020-03-30 | 2024-09-24 | Shenzhen Sunlord Electronics Co., Ltd. | Molded-forming power inductor and manufacturing method thereof |
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| CN204809004U (en) * | 2015-07-15 | 2015-11-25 | 惠州市鑫感佳电子科技有限公司 | High -power inductance of low sense of lock formula |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006286658A (en) * | 2005-03-31 | 2006-10-19 | Hitachi Ferrite Electronics Ltd | Coil component using composite core |
| CN1949411A (en) * | 2005-10-14 | 2007-04-18 | 胜美达电机（香港）有限公司 | Inductor and mfg. method thereof |
| CN2870097Y (en) * | 2005-12-07 | 2007-02-14 | 奇力新电子股份有限公司 | Improved structure of inductor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111508685A (en) * | 2020-03-30 | 2020-08-07 | 深圳顺络电子股份有限公司 | Plastic mold power inductance element and manufacturing method thereof |
| WO2021196447A1 (en) * | 2020-03-30 | 2021-10-07 | 深圳顺络电子股份有限公司 | Plastic molded power inductance element and manufacturing method |
| CN111508685B (en) * | 2020-03-30 | 2021-10-19 | 深圳顺络电子股份有限公司 | Plastic mold power inductance element and manufacturing method thereof |
| US12100543B2 (en) | 2020-03-30 | 2024-09-24 | Shenzhen Sunlord Electronics Co., Ltd. | Molded-forming power inductor and manufacturing method thereof |
| CN112185666A (en) * | 2020-09-10 | 2021-01-05 | 东莞顺络电子有限公司 | Terminal, assembled inductor and manufacturing method of terminal |
| WO2022063345A3 (en) * | 2021-12-30 | 2022-11-03 | 深圳顺络电子股份有限公司 | Nonlinear inductor and manufacturing method therefor, and non-linear inductor row |
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