CN201369206Y - Plug-in unit type common mode inductor - Google Patents
Plug-in unit type common mode inductor Download PDFInfo
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- CN201369206Y CN201369206Y CNU2009201297077U CN200920129707U CN201369206Y CN 201369206 Y CN201369206 Y CN 201369206Y CN U2009201297077 U CNU2009201297077 U CN U2009201297077U CN 200920129707 U CN200920129707 U CN 200920129707U CN 201369206 Y CN201369206 Y CN 201369206Y
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- mode inductor
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Abstract
The utility model relates to a plug-in unit type common mode inductor which comprises a magnetic conduction body and an enameled wire coil. The enameled wire coil comprises a main body and an extension part, the magnetic conduction body and the enameled wire coil adopt an integrated forming structure, and materials which form the magnetic conduction body are closely filled at the inner part of the main body and coated at the outer part of the main body. At least two main bodies which separately wind coils are arranged in one magnetic conduction body, and the extension parts of the at least two coils are respectively stretched out from the bottom face of the magnetic conduction body so as to form at least four electrodes of the plug-in unit type common mode inductor. The plug-in unit type common mode inductor has the characteristics of excellent electric performance, high production efficiency and good consistency of product performance.
Description
Technical field
The utility model relates to inductor, more particularly, relates to a kind of plug-in common-mode inductor.
Background technology
The main composition parts of existing plug-in common-mode inductor are coil and magnetic conductor, and magnetic conductor wherein can be magnetic core, iron core or copper core.In the existing plug-in common-mode inductor product, the shape of magnetic conductor 102 is generally cylindrical, I-shaped, annular (as Fig. 1) etc.; Enamelled wire is wound in the outside of magnetic conductor 102 to form coil 103, the end of coil 103 has 4 electrodes 105, with glue 101 coil 103 and magnetic conductor 102 are bonded on the base 106 together then, electrode 105 stretches out below base 106, constitutes ring plugin formula common-mode inductor as shown in Figure 1; The common trait of above-mentioned three kinds of plug-in common-mode inductors is: coil winding is in the outside of magnetic conductor 102.
In the above-mentioned existing plug-in common-mode inductor, coil and magnetic conductor are not integrated structures, can't combine closely, and, the number of plies of the coil of above-mentioned plug-in common-mode inductor has only one deck, thereby can cause that inductance value is on the low side, common mode weak effect, anti-direct current saturation characteristic are poor, be subjected to electric property difference problems such as electromagnetic interference easily.In addition, this inductor, its coil normally is wound on the magnetic conductor with manual type, and the production efficiency of this type of traditional diamond-making technique is low and can't guarantee the consistency of particular product performance parameters.
The utility model content
The technical problems to be solved in the utility model is, and is poor at the electric property of the above-mentioned inductor of prior art, makes inefficient defective, and a kind of plug-in common-mode inductor is provided.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of plug-in common-mode inductor, comprise magnetic conductor and enamelled wire coil, described coil comprises main body and extension, the structure that is formed in one between described magnetic conductor and the coil, the material that constitutes described magnetic conductor closely are filled in the inside of described main body, and closely are coated on the outside of described main body; The main body that at least two independent coilings are arranged in same magnetic conductor, the extension of described at least two coils all stretches out from the bottom surface of described magnetic conductor, forms at least four electrodes of plug-in common-mode inductor.
In plug-in common-mode inductor described in the utility model, described coil has N layer winding arrangement, and described N is the positive integer greater than zero.
In plug-in common-mode inductor described in the utility model, be welded with the electrode tip of being close to magnetic conductor on the described electrode.
In plug-in common-mode inductor described in the utility model, described extension is a flat structure, stretches out from the relative two sides of described magnetic conductor respectively, and is bent to the bottom surface of being close to described magnetic conductor respectively.
Owing to taked technique scheme, plug-in common-mode inductor of the present utility model has the following advantages:
(1), the powder that constitutes magnetic conductor closely filled coil main body inside, and closely be coated on the outside of coil main body; To compare tightness much higher with traditional inductor, and be the sealed type structure.
(2), magnetic conductor can form enclosed magnetic structure, the magnetic line of force is limited in magnetic conductor inside, so can be more much smaller than traditional inductor to the electromagnetic interference of environment.
(3), maximizing ground uses its magnetic conductor space, so its volume can be done forr a short time than traditional inductor, has the advantage of miniaturization.
(4), because the complete filling of magnetic conductor, so the requirement that can reach same inductance value under the situation of using less enamelled wire coil just can reduce the number of turns of coil; Certainly also can adopt the coil of multi-lay winding structure, make the inductance value of inductor bigger, filter effect is better, and its DC internal resistance characteristic can be littler than traditional inductor.
(5), the utility model inductor can effectively operate under up to the frequency of 100 megahertzes.
(6), the overall structure that is formed in one of the utility model inductor, do not need artificial coiling, can enhance productivity, and guarantee uniformity in product performance.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of existing annular plug-in common-mode inductor;
Fig. 2 is the structural representation of circular enamelled wire coil;
Fig. 3 is the structural representation of flat enamelled wire coil;
Fig. 4 is the structural representation of circular two groups of enamelled wire coils;
Fig. 5 is the structural representation with enamelled wire coil of multi-lay winding structure;
Fig. 6 is the cutaway view with enamelled wire coil of multi-lay winding structure;
Fig. 7 is the vertical view with enamelled wire coil of multi-lay winding structure;
Fig. 8 is the external structure schematic diagram with enamelled wire coil of multi-lay winding structure;
Fig. 9 is the schematic diagram that two extensions of circular enamelled wire coil is processed as flat electrode;
Figure 10 is the manufacturing process schematic diagram of plug-in type inductor in preferred embodiment of the utility model;
Figure 11 is the internal structure schematic diagram of plug-in common-mode inductor of the present utility model;
Figure 12 is the external structure schematic diagram of plug-in common-mode inductor of the present utility model;
Figure 13 is the manufacturing process schematic diagram that the plug-in common-mode inductor of two groups of enamelled wire coils is arranged in the preferred embodiment of the present utility model.
Embodiment
Plug-in common-mode inductor of the present utility model comprises magnetic conductor and enamelled wire coil, wherein, coil comprises main body and extension, the structure that is formed in one between described magnetic conductor and the coil, the material that constitutes described magnetic conductor closely are filled in the inside of described coil main body, and closely are coated on the outside of described coil main body; The extension of described coil reaches the outside electrode that forms this inductor of described magnetic conductor.Detailed manufacturing process and product structure see for details hereinafter.
One, the preparation of magnetic conductor powder
Magnetic conductor wherein in the utility model is mainly formed (high magnetic flux alloy magnetic powder, low magnetic flux alloy magnetic powder) by two kinds of alloy magnetic powders, also contains insulating compound (mylar Polyester resin), epoxy resin (Epoxy) and lubricant materials such as (for example zinc stearates) usually.Wherein, two kinds of alloy magnetic powders are made by carbonyl iron dust (Carbonyl Iron Powder), and the granular size of different is high magnetic flux alloy magnetic powder is 7 μ～9 μ m, and the granular size of low magnetic flux alloy magnetic powder is 3 μ m～5 μ m.
Because the granular size of two kinds of alloy magnetic powders is inequality, in principle, particle is big, and its permeability height, iron loss are big, applying frequency is lower; Otherwise particle is little, and its permeability is low, iron loss is less, applying frequency is higher.Therefore, utilize above-mentioned characteristic, suitably adjust the mixed proportion of two kinds of alloy magnetic powders, promptly can be made into and have the required best electrical characteristic inductor of electronic industry.Test shows, the permeability of the inductor that the utility model is made exceeds about 1.5～3 times than traditional inductor, and its anti-current characteristics then can promote about 30～40%.
During concrete the manufacturing, get two kinds of above-mentioned alloy magnetic powders earlier, and work as its attach ratios of adjustment according to required electrical characteristic; For example, for the above inductance value of 10 microhenrys (uH), when getting powder, high magnetic flux alloy magnetic powder accounts for 80%, and the low magnetic flux alloy magnetic powder accounts for 20%; For the following inductance value of 10 microhenrys (uH), when getting powder, high magnetic flux alloy magnetic powder and low magnetic flux alloy magnetic powder respectively account for 50%.
In these two kinds of alloy magnetic powders, add insulating compound and diluent then to carry out insulation processing, specifically be with these composite materials after stirring, insert in the oven again, 100 ℃～150 ℃ of baking temperatures, stoving time 90～120 minutes, insulating compound is hardened fully and form one deck dielectric film on magnetic surface, diluent wherein adopts acetone (Acetone).
Then, adding epoxy resin (Epoxy) through in the composite material of above-mentioned insulation processing, fully stirring makes it become cement paste.
Utilize comminutor to carry out granulation and handle, sieve with sieving machine, to generate subparticle, the granular size scope its objective is the demand that has required flowability at moulding these materials in season between 38 μ m～48 μ m.
To be somebody's turn to do the composite material of handling by granulation again and insert oven, 100～120 ℃ of baking temperatures, stoving time 30～40 minutes, and after baking is finished, the zinc stearate lubricant is added in this composite material, mix, can obtain being used to constitute the powder of magnetic conductor.
During concrete the manufacturing, establishing two kinds of alloy magnetic powders having got is 100 kilograms, and then in subsequent step, the insulating compound that needs to add is that 50～60 kilograms, diluent are that 100～120 kg, epoxy resin are that 40～50 kilograms, lubricant are 0.3～0.5 kilogram.
Two, the preparation of enamelled wire coil
Shown in Figure 2 is to have prepared one group of circular enamelled wire loop A 1 finishing, and two extensions of this coil extend in the same direction.Two such loop A 1 are encapsulated in the same inductor, can obtain common-mode inductor.
Figure 3 shows that a flat enamelled wire loop A 2.The section of enamelled wire is a flat structure in this coil, its interlude forms the loop coil main body, and then extend to the loop coil external side of main body respectively at two ends, forms two extensions, two such loop A 2 are encapsulated in the same inductor, can obtain common-mode inductor.
Shown in Figure 4 is to have prepared two groups of circular enamelled wire loop A 3 finishing, and four extensions of these two groups of coils extend in the same direction.This loop A 3 can be used for being manufactured on the plug-in common-mode inductor that at least two group independence coiling main bodys are arranged in the same magnetic conductor, in vide infra to the explanation of Figure 13.
Shown in Figure 5 is to have prepared the enamelled wire loop A of finishing 4 with N layer winding arrangement, and N is the positive integer greater than zero.Among Fig. 5, N equals 3, and promptly the number of plies of enamelled wire loop A 4 is 3 layers.This enamelled wire loop A 4 with multi-lay winding structure is applicable to and makes the bigger common-mode inductor that is mainly used in power filter of inductance value.
Shown in Figure 6 is the cutaway view with enamelled wire loop A 4 of N layer winding arrangement.Twine continuously mutually between each layer of loop A 4, every layer line circle is helical form.
Shown in Figure 7 is the vertical view with enamelled wire loop A 4 of N layer winding arrangement.Among Fig. 7, the number of plies of loop A 4 is 3, and every layer line circle is helical form, and the internal diameter of the coiler part of its innermost layer is A.
Shown in Figure 8 is the external structure schematic diagram with enamelled wire loop A 4 of N layer winding arrangement.Among Fig. 8, the enamelled wire coiled multi-layer spiral of loop A 4, the diameter of its enamelled wire is B, and two distance between electrodes is C, and the length of that extension of drawing from the innermost layer coil is D.
Shown in Figure 9 is the schematic diagram that two extensions of circular enamelled wire coil is processed as flat electrode, wherein earlier circular enamelled wire coil prototype B1 is placed a bed die B3, and is fixed; Subsequently, movably mold B2 applies pressure to bed die B3, and then two extensions of circular enamelled wire coil (B1) are pressed into the flat section by circle, just is processed as flat electrode; Obtain having the coil B4 of flat electrode at last.
Three, the manufacturing of unicoil plug-in type inductor
The manufacturing process of plug-in type inductor as shown in figure 10, the big arrow aspect among the figure shows the order of processing, promptly first the row from left to right, forward to second the row forward the third line to from left to right from right to left, again.Wherein, earlier this enamelled wire loop A 1 is inserted among the bed die D1, two extensions of this coil degree are fixed on respectively in two jacks of removable mould rod cylinder D2; Add the magnetic conductor powder I1 (obviously, during enforcement, also loop A 1 can be replaced with the coil B4 among Fig. 9) for preparing through abovementioned steps then.
Pressurize by movably below mould rod cylinder D2 and top mould rod cylinder D3, implement upper and lower balanced die casting, magnetic conductor powder I1, flat enamelled wire loop A 1 are cast into a complete whole D4 of plug-in type inductor blank; Take out the whole D4 of plug-in type inductor blank then.
Then, the plug-in type inductor D4 that again this die casting is finished inserts a baking oven, 100 ℃～120 ℃ of baking temperatures, and stoving time 60～90 minutes can obtain the plug-in type inductor D5 of finished product.
As can be seen from the above-described embodiment, wherein, surround the die casting chamber by mould D1, D2, D3; Equally, the main body of coil is in the die casting chamber, and the extension of coil then reaches outside the die casting chamber and constitutes electrode.
Obviously, the number of above-mentioned loop A 1 is replaced by two or more by one, then can produces plug-in common-mode inductor with at least 4 electrodes.
In addition, in a further embodiment, also can further described electrode (the coil B4 with flat electrode among employing Fig. 9 is then preferable) be bent to the bottom surface of being close to described magnetic conductor, the electrode tip (electrode tip does not draw among Figure 10) of burn-oning on electrode is so that be welded to inductor on the circuit board that needs electrode tip.
Figure 11 shows the internal structure schematic diagram of the plug-in common-mode inductor of finished product.Plug-in common-mode inductor comprises that the end of coil 103 is the electrode 105 of inductor by the magnetic conductor 102 of magnetic conductor powder casting forming and the coil 103 of integrated molding with it.
Figure 12 shows the external structure schematic diagram of the plug-in common-mode inductor of finished product.Four electrodes 105 of plug-in common-mode inductor are exposed to outside the magnetic conductor 102, are convenient to carry out the plug-in type welded and installed.
As can be seen from the above-described embodiment, wherein, surround the die casting chamber by mould D1, D2, D3; The main body of coil is in the die casting chamber, and the extension of coil then reaches outside the die casting chamber; In described die casting chamber, add powder then and carry out die casting and handle, make powder closely be filled in main body inside, and closely be coated on the outside of main body; The outside that extension reaches the magnetic conductor that is formed by powder compacting forms the electrode of inductor.
Obviously, when implementing, also the loop A in the foregoing description 1 can be replaced to Fig. 5, then can obtain other preferred embodiment of the present utility model to loop A 4 with N layer winding arrangement shown in Figure 8 or loop A 2, the A3 among Fig. 3, Fig. 4.Employing has the loop A 4 of multi-lay winding structure, and then coil turn is many, and inductance value is big, and the inductance value of the plug-in common-mode inductor that then obtains is also bigger, is adapted at carrying out power supply occasion uses such as filtering.
Four, contain the manufacturing of the plug-in common-mode inductor of two groups of coils
In preferred embodiment of the utility model, have two groups of enamelled wire coils plug-in common-mode inductor manufacturing process as shown in figure 13, its process is identical with the process of aforementioned unicoil plug-in type inductor, difference is to have two groups of independently coils, thus the electrode that has four extensions to form.
Wherein, surround the die casting chamber by mould E1, E2, E3; Equally, the main body of loop A 3 is in the die casting chamber, and the extension of coil then reaches outside the die casting chamber, and above-mentioned extension bending is made it to be close to the magnetic conductor bottom surface.Then electrode tip is welded to the electrode that above-mentioned extension forms, die casting obtains the whole E4 of plug-in common-mode inductor blank, passes through baking processing again.Can obtain the plug-in common-mode inductor E5 of finished product.
Inductor of the present utility model is not limited to above-mentioned specific embodiment, also can do corresponding the change as required on the basis of technical solutions of the utility model.By above-mentioned specific embodiment as can be seen, inductor of the present utility model has the following advantages:
(1), the powder of magnetic conductor closely filled coil main body inside, and closely be coated on the coil master The outside of body; With traditional cylindrical inserts formula common-mode inductor, I-shaped plug-in common-mode inductor or Ring plugin formula common-mode inductor (such as Fig. 1) is compared, and the tight ness rating of inductor of the present utility model is high to be got Many, and be the sealed type structure.
(2), enamel wire coil coats by the magnetic conductor that powder is made fully, so can form closed Magnetic structure; This is so that the magnetic line of force of inductor is limited in magnetic conductor inside, so to the electricity of environment The magnetic disturbance meeting is more much smaller than traditional inductor.
(3), the utility model inductor structure that is formed in one, maximizing ground uses its magnetic conductor sky Between, so its volume can be done littlelyr than traditional inductor, have the advantage of miniaturization.
(4), in the inductor of the present utility model because the fully filling of magnetic conductor powder, thus can Use the requirement of reaching same inductance value in the situation of less enamel wire coil, just can reduce coil The number of turns; Certainly also can adopt the coil of multi-lay winding structure, make the inductance value of inductor bigger, filtering Better effects if, and its DC internal resistance characteristic can be littler than traditional inductor. Test shows, the utility model The DC internal resistance of inductor reduces about 10～30% than traditional inductor.
(5), the magnetic conductor of the utility model inductor adopts high insulation resistance (in the test of voltage 200V Under the condition, surpass 100 megohms) the magnetic conductor powder made, this inductor can be at the adhesive surface line Produce the sensing path between the road, thus this inductor can be under up to the frequency of 100 megahertzes effective operation.
(6), the overall structure that is formed in one of the utility model inductor, do not need artificial coiling, Can enhance productivity, and guarantee the uniformity of properties of product.
(7), the utility model inductor also has the advantages such as power attenuation is little, temperature rise is low.
Claims (4)
1, a kind of plug-in common-mode inductor, comprise magnetic conductor and enamelled wire coil, described coil comprises main body and extension, it is characterized in that, the structure that is formed in one between described magnetic conductor and the coil, the material that constitutes described magnetic conductor closely are filled in the inside of described main body, and closely are coated on the outside of described main body; The main body that at least two independent coilings are arranged in the same magnetic conductor, the extension of described at least two coils all stretches out from the bottom surface of described magnetic conductor, forms at least four electrodes of plug-in common-mode inductor.
2, plug-in common-mode inductor according to claim 1 is characterized in that, described coil has N layer winding arrangement, and described N is the positive integer greater than zero.
3, plug-in common-mode inductor according to claim 1 is characterized in that, is welded with the electrode tip of being close to magnetic conductor on the described electrode.
4, plug-in common-mode inductor according to claim 1 is characterized in that, described extension is a flat structure, stretches out from the relative two sides of described magnetic conductor respectively, and is bent to the bottom surface of being close to described magnetic conductor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201297077U CN201369206Y (en) | 2009-01-21 | 2009-01-21 | Plug-in unit type common mode inductor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201297077U CN201369206Y (en) | 2009-01-21 | 2009-01-21 | Plug-in unit type common mode inductor |
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| Publication Number | Publication Date |
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| CN201369206Y true CN201369206Y (en) | 2009-12-23 |
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| CNU2009201297077U Expired - Fee Related CN201369206Y (en) | 2009-01-21 | 2009-01-21 | Plug-in unit type common mode inductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783227B (en) * | 2009-01-21 | 2012-10-17 | 深圳感通科技有限公司 | Plug-in common-mode inductor and manufacturing method thereof |
-
2009
- 2009-01-21 CN CNU2009201297077U patent/CN201369206Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783227B (en) * | 2009-01-21 | 2012-10-17 | 深圳感通科技有限公司 | Plug-in common-mode inductor and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091223 Termination date: 20140121 |