CN101783227A - Plug-in common-mode inductor and manufacturing method thereof - Google Patents
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- CN101783227A CN101783227A CN200910105178A CN200910105178A CN101783227A CN 101783227 A CN101783227 A CN 101783227A CN 200910105178 A CN200910105178 A CN 200910105178A CN 200910105178 A CN200910105178 A CN 200910105178A CN 101783227 A CN101783227 A CN 101783227A
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Abstract
The invention relates to a plug-in common-mode inductor comprising a magnetizer and enamel wire coils. The coils comprise main bodies and extension parts; the magnetizer and the coils are in an integrated structure, the materials forming the magnetizer are tightly filled inside the main bodies and tightly cover the outside of the main bodies; the main bodies of at least two independently winding coils are arranged in the same magnetizer and the extension parts of at least two of the coils extend from the bottom surface of the magnetizer to form at least four electrodes of the plug-in common-mode inductor. The invention also relates to a manufacturing method of the plug-in common-mode inductor. The method comprises the following steps of: preparing the coils and powder materials forming the magnetizer and die-casting the coils and the powder materials to form the inductor. In the invention, the inductor has excellent electrical property and high production efficiency and the product has favorable consistency of performance.
Description
Technical field
The present invention relates to inductor, more particularly, relate to a kind of plug-in common-mode inductor and manufacture method thereof.
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.
Summary of the invention
One of the technical problem to be solved in the present invention 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.
Two of the technical problem to be solved in the present invention is, and is poor at the electric property of the above-mentioned inductor of prior art, makes inefficient defective, and a kind of manufacture method of plug-in common-mode inductor is provided.
The present invention solves the technical scheme that one of its technical problem adopts: 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 of the present invention, described coil has N layer winding arrangement, and described N is the positive integer greater than zero.
In plug-in common-mode inductor of the present invention, be welded with the electrode tip of being close to magnetic conductor on the described electrode.
In plug-in common-mode inductor of the present invention, 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.
Two technical schemes that adopted that the present invention solves its technical problem are: a kind of manufacture method of plug-in common-mode inductor is provided, may further comprise the steps:
(1), prepare the enamelled wire coil, make described coil have N layer winding arrangement during preparation, described N be greater than zero positive integer according to the electrical characteristic of the inductor that will make; And preparation is used to constitute the powder of magnetic conductor;
(2), the main body of at least two described coils is put into a die casting chamber, the extension of described coil then reaches outside the described die casting chamber;
(3), in described die casting chamber, add described powder, and carry out die casting and handle, make described powder closely be filled in described main body inside, and closely be coated on the outside of described main body; Described extension reaches the outside of the magnetic conductor that is formed by described powder compacting and forms the electrode of this inductor;
(4), from described die casting chamber, take out described inductor blank, and then carry out baking processing.
In the manufacture method of plug-in common-mode inductor of the present invention, in described step (1), prepare described powder according to the following steps:
(101), according to the electrical characteristic of the inductor that will make, choose high magnetic flux alloy magnetic powder, the low magnetic flux alloy magnetic powder of corresponding proportion;
(102), in these two kinds of alloy magnetic powders, add insulating compound and diluent to carry out insulation processing, wherein composite material is stirred, insert in the oven again and toast, insulating compound is hardened fully and form one deck dielectric film on alloy magnetic powder surface;
(103), through adding epoxy resin in the composite material of above-mentioned insulation processing, fully stir and make it become cement paste;
(104), utilizing comminutor to carry out granulation handles, sieves with sieving machine, to generate subparticle again;
(105), the composite material after will handling by granulation inserts oven and toasts, and after baking is finished lubricant added this wherein, mixes, and can obtain the described powder that is used to constitute magnetic conductor.
In the manufacture method of plug-in common-mode inductor of the present invention, in described step (101), described two kinds of alloy magnetic powders are made by carbonyl iron dust, and the granular size of wherein high magnetic flux alloy magnetic powder is 7 μ m～9 μ m, and the granular size of low magnetic flux alloy magnetic powder is 3 μ m～5 μ m;
In described step (102), described insulating compound is a mylar, and described diluent is an acetone, and the temperature during baking is 100 ℃～150 ℃, and the time is 90～120 minutes;
In described step (104), the subparticle magnitude range of generation is between 38 μ m～48 μ m;
In described step (105), described lubricant is a zinc stearate, and during baking is 100～120 ℃ of temperature, and the time is 30～40 minutes.
In the manufacture method of plug-in common-mode inductor of the present invention, in described step (4), the temperature when toasting is 100 ℃～120 ℃, and the time is 60～90 minutes.
In the manufacture method of plug-in common-mode inductor of the present invention, in described step (1), make described coil have N layer winding arrangement during the preparation coil, described N is the positive integer greater than zero.
In the manufacture method of plug-in common-mode inductor of the present invention, in described step (1), comprise that two extensions with coil are pressed into flat by circle, obtain having the step of the coil of flat electrode; Comprise in the described step (4) and described electrode is bent to the bottom surface of being close to described magnetic conductor, the step of the electrode tip of on electrode, burn-oning.
Owing to taked technique scheme, plug-in common-mode inductor of the present invention and manufacture method thereof have 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), inductor of the present invention can effectively operate under up to the frequency of 100 megahertzes.
(6), the overall structure that is formed in one of inductor of the present invention, do not need artificial coiling, can enhance productivity, and guarantee uniformity in product performance.
Description of drawings
The invention will be further described 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 a preferred embodiment of the invention;
Figure 11 is the internal structure schematic diagram of plug-in common-mode inductor of the present invention;
Figure 12 is the external structure schematic diagram of plug-in common-mode inductor of the present invention;
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 a preferred embodiment of the present invention.
Embodiment
Plug-in common-mode inductor of the present invention 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 among the present invention 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 present invention 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 further preferred embodiment of the rpesent invention 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 a preferred embodiment of the invention, 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, and 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 1 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 invention and manufacture method thereof are not limited to above-mentioned specific embodiment, also can do corresponding the change as required on the basis of technical solution of the present invention.By above-mentioned specific embodiment as can be seen, inductor of the present invention and manufacture method thereof have the following advantages:
(1), the powder of magnetic conductor closely filled coil main body inside, and closely be coated on the outside of coil main body; Compare with traditional cylindrical inserts formula common-mode inductor, I-shaped plug-in common-mode inductor or ring plugin formula common-mode inductor (as Fig. 1), the tightness of inductor of the present invention is much higher, and is the sealed type structure.
(2), the enamelled wire coil coats by the magnetic conductor that powder is made fully, so can form enclosed magnetic structure; This makes the magnetic line of force of inductor be limited in magnetic conductor inside, so can be more much smaller than traditional inductor to the electromagnetic interference of environment.
(3), the inductor of the present invention structure that is formed in one, 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), in the inductor of the present invention, because the complete filling of magnetic conductor powder, 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.Test shows, the DC internal resistance of inductor of the present invention reduces about 10～30% than traditional inductor.
(5), the magnetic conductor of inductor of the present invention adopts high insulation resistance (under the test condition of voltage 200V, surpass 100 megohms) the magnetic conductor powder made, this inductor can not produce the sensing path between the surface adhering circuit, so this inductor can effectively operate under up to the frequency of 100 megahertzes.
(6), the overall structure that is formed in one of inductor of the present invention, do not need artificial coiling, can enhance productivity, and guarantee uniformity in product performance.
(7), inductor of the present invention also has advantages such as power loss is little, temperature rise is low.
Claims (10)
1. 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.
5. the manufacture method of a plug-in common-mode inductor is characterized in that, may further comprise the steps:
(1), prepare the enamelled wire coil, and preparation is used to constitute the powder of magnetic conductor according to the electrical characteristic of the inductor that will make;
(2), the main body of at least two described coils is put into a die casting chamber, the extension of described coil then reaches outside the described die casting chamber;
(3), in described die casting chamber, add described powder, and carry out die casting and handle, make described powder closely be filled in described main body inside, and closely be coated on the outside of described main body; Described extension reaches the outside of the magnetic conductor that is formed by described powder compacting and forms the electrode of this inductor;
(4), from described die casting chamber, take out described inductor blank, and then carry out baking processing.
6. method according to claim 5 is characterized in that, in described step (1), prepares described powder according to the following steps:
(101), according to the electrical characteristic of the inductor that will make, choose high magnetic flux alloy magnetic powder, the low magnetic flux alloy magnetic powder of corresponding proportion;
(102), in these two kinds of alloy magnetic powders, add insulating compound and diluent to carry out insulation processing, wherein composite material is stirred, insert in the oven again and toast, insulating compound is hardened fully and form one deck dielectric film on alloy magnetic powder surface;
(103), through adding epoxy resin in the composite material of above-mentioned insulation processing, fully stir and make it become cement paste;
(104), utilizing comminutor to carry out granulation handles, sieves with sieving machine, to generate subparticle again;
(105), the composite material after will handling by granulation inserts oven and toasts, and after baking is finished lubricant added this wherein, mixes, and can obtain the described powder that is used to constitute magnetic conductor.
7. method according to claim 5, it is characterized in that in described step (101), described two kinds of alloy magnetic powders are made by carbonyl iron dust, the granular size of wherein high magnetic flux alloy magnetic powder is 7 μ m～9 μ m, and the granular size of low magnetic flux alloy magnetic powder is 3 μ m～5 μ m;
In described step (102), described insulating compound is a mylar, and described diluent is an acetone, and the temperature during baking is 100 ℃～150 ℃, and the time is 90～120 minutes;
In described step (104), the subparticle magnitude range of generation is between 38 μ m～48 μ m;
In described step (105), described lubricant is a zinc stearate, and during baking is 100～120 ℃ of temperature, and the time is 30～40 minutes.
8. method according to claim 5 is characterized in that, in described step (4), the temperature when toasting is 100 ℃～120 ℃, and the time is 60～90 minutes.
9. method according to claim 5 is characterized in that, in described step (1), makes described coil have N layer winding arrangement during the preparation coil, and described N is the positive integer greater than zero.
10. method according to claim 5 is characterized in that, in described step (1), comprises that two extensions with coil are pressed into flat by circle, obtains having the step of the coil of flat electrode; Comprise in the described step (4) and described electrode is bent to the bottom surface of being close to described magnetic conductor, the step of the electrode tip of on electrode, burn-oning.
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| CN200910105178A CN101783227B (en) | 2009-01-21 | 2009-01-21 | Plug-in common-mode inductor and manufacturing method thereof |
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| CN102655045A (en) * | 2012-04-18 | 2012-09-05 | 江苏泰昌电子有限公司 | Common-mode inductor for LED (light-emitting diode) displays |
| CN103377821A (en) * | 2012-04-11 | 2013-10-30 | 美磊科技股份有限公司 | Production method of SMT chip coil |
| CN103578728A (en) * | 2012-08-09 | 2014-02-12 | 三积瑞科技（苏州）有限公司 | Manufacturing method of distributed plastic inductor |
| CN107799271A (en) * | 2017-11-23 | 2018-03-13 | 深圳振华富电子有限公司 | Common-mode inductor and its manufacture method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3670575B2 (en) * | 2000-01-12 | 2005-07-13 | Ｔｄｋ株式会社 | Method for manufacturing coil-enclosed dust core and coil-enclosed dust core |
| CN1862720A (en) * | 2006-05-19 | 2006-11-15 | 北京七星飞行电子有限公司 | Coil embedded metal magnetic powder core chip inductor |
| CN201369206Y (en) * | 2009-01-21 | 2009-12-23 | 深圳感通科技有限公司 | Plug-in unit type common mode inductor |
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2009
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103377821A (en) * | 2012-04-11 | 2013-10-30 | 美磊科技股份有限公司 | Production method of SMT chip coil |
| CN103377821B (en) * | 2012-04-11 | 2016-03-23 | 美磊科技股份有限公司 | The manufacture method of surface adhesion type wafer coil |
| CN102655045A (en) * | 2012-04-18 | 2012-09-05 | 江苏泰昌电子有限公司 | Common-mode inductor for LED (light-emitting diode) displays |
| CN103578728A (en) * | 2012-08-09 | 2014-02-12 | 三积瑞科技（苏州）有限公司 | Manufacturing method of distributed plastic inductor |
| CN107799271A (en) * | 2017-11-23 | 2018-03-13 | 深圳振华富电子有限公司 | Common-mode inductor and its manufacture method |
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| CN101783227B (en) | 2012-10-17 |
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