CN201655472U - Winding inductance coil part - Google Patents
Winding inductance coil part Download PDFInfo
- Publication number
- CN201655472U CN201655472U CN2009202661836U CN200920266183U CN201655472U CN 201655472 U CN201655472 U CN 201655472U CN 2009202661836 U CN2009202661836 U CN 2009202661836U CN 200920266183 U CN200920266183 U CN 200920266183U CN 201655472 U CN201655472 U CN 201655472U
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- magnetic core
- coil
- magnetic
- winding inductor
- coiled wire
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Abstract
The utility model discloses a winding inductance coil part comprising a magnetic core, and a winding coil and a glue curing part which are wound on the magnetic core; the glue curing part covers the winding coil and fills a gap between the winding coil and the magnetic core; and the glue curing part is cured from magnetic hybrid materials comprising glue and magnetic powder. The winding inductance coil part facilitates the stabilization of the coil structure, improves the anti-impact capability of the magnetic core, and ensures that the electrical performance and reliability of the product are not deteriorated in intense external vibration.
Description
Technical field
The utility model relates to inductor, particularly relates to a kind of coil element of winding inductor.
Background technology
In recent years, when requiring the coil element of winding inductor miniaturization, pay attention to production cost and dependability more, require product under temperature acute variation and outside powerful situation of impacting, still can keep the product serviceability and deterioration significantly do not occur.Known polytype coil element of winding inductor, in these types, patent documentation 1: there is coil in the bobbin portion that publication number CN 1637964A discloses at the drum type magnetic core, disposes the magnetic powder potting resin with special curing characteristics around this coil; In addition, patent documentation 2: publication number CN 101004967A discloses with magnetic resin and has covered the drum type magnetic core, at the product structure of coil component bottom mounting terminal parts.
The potting resin that contains the powder that is magnetic in the patent documentation 1 disclosed formation in the filling of drum type magnetic core, it solidifies the back is rubbery state, because resin is to magnetic core, up and down a little less than the cementation between magnetic core blade, the inner coiling under the rubbery state, so product is prone to electrical skew and anti-physical impact performance and reduces under peripheral severe impact fluctuation.
Patent documentation 2 disclosed formation being provided with have polygonal bottom and establish a plurality of surrounding wall portion of setting from any side of this bottom, simultaneously, a plurality of above-mentioned surrounding wall portion have with last magnetic core blade respectively and descend at least one side's of magnetic core blade neighboring to carry out a plurality of terminal components that part contacts, thereby are convenient to fill composite material in surrounding wall portion and magnetic core formation space; In addition, the outer electrode tie point is set in surrounding wall portion on any one.Because the parts number of packages is many, increased the installing space of product, opposite with miniaturization of components trend; Simultaneously, parts make production process loaded down with trivial details more, cause product cost to increase, and cost performance is lower.
The utility model content
Main purpose of the present utility model is exactly at the deficiencies in the prior art, and a kind of strong anti-physical impact performance that has is provided, and electric property is stable, coil element of winding inductor simultaneously with low cost.
For achieving the above object, the utility model is by the following technical solutions:
A kind of coil element of winding inductor, comprise magnetic core, be wrapped in coiled wire-wound coil and glue curing portion on the described magnetic core, the glue curing portion that solidify to form by the magnetic composite material that comprises glue and magnetic powder cover described coiled wire-wound coil and fill described coiled wire-wound coil and described magnetic core between the gap.
Preferably, described magnetic core is the drum type magnetic core, described drum type magnetic core comprises magnetic core blade, following magnetic core blade and the volume core that is connected upper and lower magnetic core blade, and described coiled wire-wound coil is wound on the described volume core and its both ends are electrically connected with the external connecting electrode that forms on one of upper and lower magnetic core blade.
Preferably, described external connecting electrode is included in two metallization grooves that the described bottom of magnetic core blade is down offered, and described coiled wire-wound coil two ends are electrically connected to respectively in one of them metallization groove.
Preferably, described metallization groove is handled to reinforce described external connecting electrode through wicking.
Preferably, described external connecting electrode comprises two metal pins that are fixed on the described magnetic core blade down, and described coiled wire-wound coil two ends are electrically connected one of them metal pins respectively.
Preferably, the described bottom surface of magnetic core blade down has connecting through hole, and described metal pins is drawn by described connecting through hole.
Preferably, described metal pins is handled to reinforce described external connecting electrode through wicking.
The utility model beneficial technical effects is:
In coil element of winding inductor of the present utility model, cover coiled wire-wound coil and fill coiled wire-wound coil and magnetic core between the glue curing portion in gap solidify to form by the magnetic composite material that comprises glue and magnetic powder, solidify its physical property of back can reach shore hardness be D60 or more than, help the ballast coil structure, improve the magnetic core impact resistance, thereby the electric property and the reliability of products that guarantee product in violent external vibration process deterioration can not appear.The reliability experimental result shows, magnetic composite material shore hardness is D60 or when above when cured, and product is at 5-55HZ, under the amplitude 1.5mm situation, vibrates after 2 hours the inductance value amplitude of variation less than 1%.Simultaneously, glue curing portion closely is connected with magnetic core, and when extraneous physical impact took place, the magnetic composite material after the curing played support, firm and transmission stress to magnetic core, thereby make the anti-physical impact performance of product significantly promote, the product Mechanical Reliability increases.In addition, except playing the effect of binding agent, owing to contain the magnetic powder of specific proportioning, glue curing portion forms closed magnetic circuit can be issued to bigger inductance value in the situation of identical coil parameter.Compare with common sleeve type structured core, under the situation of same line coil structures, glue curing of the present utility model portion can make the product inductance value improve 0%～150%, thereby reduces the production cost.Moreover the paste body shape for having better flowability before this magnetic composite material solidifies is suitable for gluing process, therefore, only, just can finish a plurality of parts energy role in the aforementioned patent document 2, thereby can simplify the operation that is used to form inductance element by control point glue parameter.
Description of drawings
Fig. 1 is the stereogram of the drum-shaped magnetic core of a kind of embodiment coil element of winding inductor of the utility model;
Fig. 2 a-2c is respectively front view, right view and the vertical view of drum-shaped magnetic core shown in Figure 1;
Fig. 3 is the stereogram of a kind of embodiment coil element of winding inductor of the utility model;
Fig. 4 a-4c is respectively front view, right view and the vertical view of coil element of winding inductor shown in Figure 3;
Fig. 5 is the sectional side view of coil element of winding inductor shown in Figure 3, promptly represents with by the center of drum-shaped magnetic core, cut off the schematic diagram of back state perpendicular to the plane of upper and lower magnetic core blade simultaneously;
Fig. 6 is the curve synoptic diagram of inductance value amplitude of variation behind the corresponding vibration experiment of the different shore hardnesses of glue curing portion;
Fig. 7 rises than the ratio of glue with ferrite magnetic powder, the descend saturation current schematic diagram of 15% o'clock correspondence of product inductance value;
Fig. 8 is the stereogram of the pin-type of the another kind of embodiment coil element of winding inductor of the utility model.
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Embodiment
As Fig. 1～shown in Figure 5, the coil element of winding inductor of a kind of embodiment comprises ferrite drum type magnetic core and coiled wire-wound coil.The drum type magnetic core has last magnetic core blade 11, following magnetic core blade 12 and is connected the cylindricality volume core 13 of upper and lower magnetic core blade, and coiled wire-wound coil 31 is wrapped on the volume core 13, and its both ends are electrically connected to down the external connecting electrode 22 on the magnetic core blade 12.This coil element of winding inductor also has the magnetic composite material that has mixed magnetic powder and glue, this magnetic composite material solidifies the back and forms between the glue curing portion 4 between the magnetic core blade up and down, and it covers the coiled wire-wound coil between the upper and lower magnetic core blade and is filled in the space between the upper and lower magnetic core blade 11,12.Wherein, the weight ratio of magnetic powder and glue preferably was not less than 10: 8.Adopt the magnetic composite material of magnetic powder and glue, solidify its shore hardness of back can be D60 or more than, so be beneficial to the ballast coil structure, improve magnetic core blade impact resistance, thereby guarantee that product electric property and product reliability deterioration can not occur in violent external vibration process.
Please refer to Fig. 6, as seen from the figure, follow the continuous increase of glue curing portion hardness, product inductance value amplitude of variation constantly narrows, and after shore hardness reached D60, the inductance value amplitude of variation substantially no longer changed letter.Rely the property experimental result to show, the composite material shore hardness is D60 or when above when cured, and product is at 5-55HZ, under the amplitude 1.5mm situation, vibrates after 2 hours the inductance value amplitude of variation less than 1%.
Simultaneously, owing to contain the magnetic powder of this specific proportioning, the closed magnetic circuit that glue curing portion forms can be issued to bigger inductance value in the situation of identical coil parameter.Compare with common sleeve type structured core, under the situation of same line coil structures, the glue curing portion of this coil element of winding inductor can make the product inductance value improve 0%～150%, thereby reduces the production cost.
On the other hand, glue curing portion closely is connected with upper and lower magnetic core blade, play the effect of binding agent, when extraneous physical impact takes place, magnetic composite material after the curing plays support, firm and transmission stress to the magnetic core blade, thereby make the anti-physical impact performance of product significantly promote, the product Mechanical Reliability increases.
Preferably, described magnetic powder is a ferrite magnetic powder, and described glue main body is an epoxy resin.The magnetic composite material can also adopt other prescription, as propylene glycol, epoxy resin mixed system, silicones system etc.Concrete example as, the magnetic composite material can be the body of paste that comprises ferrite magnetic powder, epoxy resin, calcium carbonate, alundum (Al, silicon dioxide and alcohols diluent, also can be the body of paste that comprises magnetic powder, silicones and alundum (Al, silica additive.
As shown in table 1, illustrated that wherein glue curing portion is to the influence of properties of product under the different proportioning situations with glue of magnetic powder.Follow the ferrite magnetic powder ratio to increase, the product inductance value improves constantly; And when the ferrite powder ratio increased, also soft to change matter into hard by matter for the hardness of glue curing portion 41, and promptly hardness increases gradually.Owing to have positive thermal coefficient of expansion behind the used epoxy resin cure, so in carrying out the thermal shock experimentation, when epoxy resin content is higher in the glue curing portion, corresponding bigger expansion amplitude, exist bigger stress between glue curing portion 41 and the upper and lower magnetic core blade 11,12 this moment, easily causes the magnetic core blade cracking to occur.As shown in table 1, when epoxy resin content in the solidified portion surpassed 50%, in the thermal shock experimentation, cracking phenomena had appearred in product magnetic core blade.
Physical characteristic after different proportionings of table 1 magnetic glue and the curing
Annotate: (1) thermal shock condition is 10 circulations of-40～+ 125 ℃ of thermal shocks;
(2) ☆ magnetic core blade flawless ★ magnetic core blade has crackle.
In addition, lotion for having better flowability before this magnetic composite material solidifies is suitable for gluing process, only by control point glue parameter, just a plurality of parts energy role in the aforementioned patent document 2 can be finished, thereby the operation that is used to form inductance element can be simplified.
In preferred embodiment, the weight ratio of described magnetic powder and described glue is 10: 8.Glue curing portion magnetic powder content is unsuitable too high.Help improving the product inductance value and increase product reliability though the magnetic powder content improves, but when the magnetic powder content is too high, glue curing portion porosity reduces, coil periphery magnetic field porosity reduces to some extent, cause the anti-current characteristics reduction of product, the direct current biasing characteristic has degradation trend, deterioration product applied environment.Fig. 7 has illustrated and has followed the descend saturation current of 15% o'clock correspondence of the rising of ferrite magnetic powder than glue ratio, product inductance value to reduce.Take into account product direct current biasing characteristic and product Mechanical Reliability, think that ferrite powder is that 10: 8 ratio is comparatively suitable than glue, promptly the shore hardness of glue curing portion be near the D60 comparatively suitable.
In addition, consider at the conductive coil peripheral space and fill magnetic glue, will make the closed magnetic circuit structure, thereby influence the direct current biasing characteristic of inductor product, so be necessary the influence of solidified portion magnetic powder particles size is analyzed.Actual experiment is the result show, when magnetic particle size was in the 1-200um scope, the bigoted characteristic of the direct current of product did not have marked change, promptly when magnetic particle size is in the 1-200um scope, can consider the influence that it is bigoted to the product direct current.
As Fig. 2 c, Fig. 4 b and shown in Figure 5, in certain embodiments, the bottom surface of the following magnetic core blade of drum type magnetic core has metallization groove 21, coiled wire-wound coil is wrapped on the volume core and its both ends are electrically connected to down in the metallization groove of magnetic core blade, preferably forms product external connecting electrode 22 by wicking again.This electrode still can bear the above peeling force of 50N after-40 ℃ ~+85 ℃ 200 thermal shocks circulations.
As shown in Figure 8, in certain embodiments, the bottom surface of the following magnetic core blade of drum type magnetic core has connecting through hole, the drum type magnetic core also has metal pins, can be metal leg or metal needle 21 ', coiled wire-wound coil is wrapped on the volume core and its both ends 32 be electrically connected to metal leg or metal needle 21 ' on, metal leg or metal needle 21 ' drawn by the connecting through hole of magnetic core blade down, preferably again by wicking form external connecting electrode 22 '.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (7)
1. coil element of winding inductor, comprise magnetic core, be wrapped in coiled wire-wound coil and glue curing portion on the described magnetic core, it is characterized in that, the glue curing portion that solidify to form by the magnetic composite material that comprises glue and magnetic powder cover described coiled wire-wound coil and fill described coiled wire-wound coil and described magnetic core between the gap.
2. coil element of winding inductor as claimed in claim 1, it is characterized in that, described magnetic core is the drum type magnetic core, described drum type magnetic core comprises magnetic core blade, following magnetic core blade and the volume core that is connected upper and lower magnetic core blade, and described coiled wire-wound coil is wound on the described volume core and its both ends are electrically connected with the external connecting electrode that forms on one of upper and lower magnetic core blade.
3. coil element of winding inductor as claimed in claim 2, it is characterized in that, described external connecting electrode is included in two metallization grooves that the described bottom of magnetic core blade is down offered, and described coiled wire-wound coil two ends are electrically connected to respectively in one of them metallization groove.
4. coil element of winding inductor as claimed in claim 3 is characterized in that, described metallization groove is handled to reinforce described external connecting electrode through wicking.
5. coil element of winding inductor as claimed in claim 2 is characterized in that, described external connecting electrode comprises two metal pins that are fixed on the described magnetic core blade down, and described coiled wire-wound coil two ends are electrically connected one of them metal pins respectively.
6. coil element of winding inductor as claimed in claim 5 is characterized in that, the described bottom surface of magnetic core blade down has connecting through hole, and described metal pins is drawn by described connecting through hole.
7. as claim 5 or 6 described coil element of winding inductor, it is characterized in that described metal pins is handled to reinforce described external connecting electrode through wicking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202661836U CN201655472U (en) | 2009-10-27 | 2009-10-27 | Winding inductance coil part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202661836U CN201655472U (en) | 2009-10-27 | 2009-10-27 | Winding inductance coil part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201655472U true CN201655472U (en) | 2010-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202661836U Expired - Lifetime CN201655472U (en) | 2009-10-27 | 2009-10-27 | Winding inductance coil part |
Country Status (1)
| Country | Link |
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| CN (1) | CN201655472U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440958A (en) * | 2013-08-13 | 2013-12-11 | 深圳振华富电子有限公司 | Encapsulation structure of wire winding type electronic device and chip inductor |
| CN105608971A (en) * | 2016-03-25 | 2016-05-25 | 贵州励天科技发展有限公司 | Electromagnetic propulsion device |
| CN107393688A (en) * | 2016-05-16 | 2017-11-24 | 深圳市京泉华科技股份有限公司 | Magnetic core and the inductance device for having the magnetic core |
| CN113405446A (en) * | 2021-05-11 | 2021-09-17 | 联合汽车电子有限公司 | Method and device for detecting gap of magnetic core of transformer |
-
2009
- 2009-10-27 CN CN2009202661836U patent/CN201655472U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440958A (en) * | 2013-08-13 | 2013-12-11 | 深圳振华富电子有限公司 | Encapsulation structure of wire winding type electronic device and chip inductor |
| CN105608971A (en) * | 2016-03-25 | 2016-05-25 | 贵州励天科技发展有限公司 | Electromagnetic propulsion device |
| CN107393688A (en) * | 2016-05-16 | 2017-11-24 | 深圳市京泉华科技股份有限公司 | Magnetic core and the inductance device for having the magnetic core |
| CN113405446A (en) * | 2021-05-11 | 2021-09-17 | 联合汽车电子有限公司 | Method and device for detecting gap of magnetic core of transformer |
| CN113405446B (en) * | 2021-05-11 | 2023-08-08 | 联合汽车电子有限公司 | Method and device for detecting gap of magnetic core of transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
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| CX01 | Expiry of patent term |