CN1949411A - Inductor and mfg. method thereof - Google Patents
Inductor and mfg. method thereof Download PDFInfo
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- CN1949411A CN1949411A CN 200510116353 CN200510116353A CN1949411A CN 1949411 A CN1949411 A CN 1949411A CN 200510116353 CN200510116353 CN 200510116353 CN 200510116353 A CN200510116353 A CN 200510116353A CN 1949411 A CN1949411 A CN 1949411A
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- magnetic core
- conductor
- inductor
- inner chamber
- depressed part
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Abstract
The invention relates to a sensor that includes a first magnetic core, a second magnetic core and a conductor. The conductor includes the incenting section to contain the second magnetic core. Two ends extrude to from pole section. Cavity that could contain the incenting section is set in the first magnetic core. The invention also supplies the method to make inductor.
Description
Technical field
The present invention relates to a kind of inductor and manufacture method thereof.
Background technology
Inductor has obtained very using widely in various circuit design as a kind of basic components and parts.In recent years, because developing rapidly of the semiconductor technology and the communication technology, performance for employed inductor in digitized various electronic equipments and communication equipment has proposed new requirement, and these requirements are mainly reflected in many aspects such as miniaturization, big operating current, small inductor value, high reliability.
In order to satisfy the new demand to inductor, people have done many improvement to inductor on the basis of traditional manufacturing technology.For example, patent documentation JP11-40426 discloses a kind of inductor element, and first magnetic core and second magnetic core set that wherein will have different magnetic properties are fitted together, at least one face contact separately.On the contact-making surface of first magnetic core, be provided with at least one groove.Conductor places in the groove, and its main part is surrounded by first magnetic core and second magnetic core.The end structure that is positioned at the groove outside in the conductor is a terminal.The width of terminal is greater than the width of conductor main part.The inductor of this invention relies on the terminal that is positioned at the groove outside to be connected with outside, occurs such as distortion such as terminal upwarp easily in producing and using, thereby causes when welding not firmly, even has the generation of rosin joint phenomenon.In addition, because terminal is protruding, therefore be unfavorable for reducing the volume of inductor.
In addition, patent documentation JP2001-52934 also discloses a kind of inductance element, and wherein the depth direction at a face upper edge cavity of prism-shaped FERRITE CORE is provided with slit, and tape conductor is inserted in the cavity.The two ends of tape conductor bend towards the bottom surface of FERRITE CORE, to form the face mounting terminal.Repeatedly pass the number of turn that cavity increases tape conductor by tape conductor, thereby increase inductance.In the inductance element of this invention, can see, because mounting terminal is arranged on the bottom of inductance element, so increased the thickness of inductance element.In addition, terminal forms by crooked after conductor passes cavity, and this process causes conductor coating to come off easily and magnetic core breaks, and is not easy to guarantee the position of conductor, thereby influences the accuracy of inductance value, has increased the difficulty of making.
In addition, patent documentation JP2000-315610 discloses a kind of choking-winding, and it is made of electrode and two magnetic cores.But this magnetic core also is provided with the groove of the bend of installing electrodes.In this choking-winding, the bend of electrode is installed in the groove of a magnetic core, and the mounting terminal of electrode is installed in the bottom of same magnetic core, so that they are formed as one.Then two magnetic cores are combined, its groove is separately faced with each other.In the choking-winding of this invention, mounting terminal is located at the bottom of magnetic core, has therefore increased the thickness of choking-winding.In addition, because its number of electrodes is limited, so inductance value is difficult to change.In addition, in order to guarantee conductor not run-off the straight after installation, conductor is set to the cross section and is the roughly shape of M shape, and needs certain elasticity.Yet its conductivity of rubber-like material is inevitable relatively poor relatively, and also there is certain influence in the miniature deformation of elastomeric material to the precision of inductance value, has therefore just restricted the performance of choking-winding.
Summary of the invention
The objective of the invention is to overcome the defective that prior art exists, a kind of inductor and manufacture method thereof that distortion, operation are easy, simple in structure, can realize big electric current and miniaturization of not having when mounted is provided, wherein can also makes up a plurality of conductors and change inductance value by series and parallel.
According to an aspect of the present invention, a kind of inductor is provided, it comprises first magnetic core, second magnetic core and conductor, wherein, conductor comprises the depressed part that is configured to hold second magnetic core, its two ends oppositely stretch out each other and have formed electrode part, and first magnetic core is provided with the inner chamber that is used to hold the conductor depressed part.
According to a preferred embodiment of the present invention, conductor is U-shaped roughly.
According to a preferred embodiment of the present invention, be provided with groove in the both sides of the inner chamber of first magnetic core, its can be when conductor be placed inner chamber hold electrodes portion.After electrode part was in the groove, it did not highly exceed or slightly exceeds first magnetic core.
According to a preferred embodiment of the present invention, conductor is a plurality of conductors.On groove, be provided with the location division, be used to separate a plurality of conductors.
According to a further aspect in the invention, a kind of method of making inductor is provided, this inductor comprises first magnetic core, second magnetic core and conductor, the method comprising the steps of: (a) process in conductor and have the depressed part that can hold second magnetic core, and the two ends of conductor are oppositely outwards bent each other, form electrode part; (b) in first magnetic core, process the inner chamber of the depressed part that is suitable for holding conductor; And (c) conductor, second magnetic core and first magnetic core are assembled together, make the depressed part of conductor be arranged in the inner chamber of first magnetic core, and second magnetic core is arranged in depressed part.
According to a preferred embodiment of the present invention, conductor is made for U-shaped.
According to a preferred embodiment of the present invention, the both sides that step (b) also is included in the inner chamber of first magnetic core process groove, and it is used for hold electrodes portion and makes the height of electrode part not exceed or slightly exceed first magnetic core.
According to a preferred embodiment of the present invention, provide a plurality of conductors, and on groove, process the location division, be used to separate a plurality of conductors.
According to a preferred embodiment of the present invention, earlier first magnetic core, second magnetic core and conductor are carried out machine-shaping, carry out surface-coated or plating then.
According to a preferred embodiment of the present invention, first magnetic core, second magnetic core and conductor dbus are crossed cohesive material and are fixed.
Inductor of the present invention is realized connection between conductor, first magnetic core and second magnetic core by stacked connection, therefore essentially no distortion between erecting stage, utilize the groove of the inner chamber of first magnetic core and both sides thereof to determine the position of conductor simultaneously, this has just improved the performance of inductor.In addition, the assembling of this stacked structure is simple and reliable, low cost of manufacture.In addition, electrode part can be not protruding from assembly after assembling, and it does not highly exceed or slightly exceed first magnetic core, therefore can realize the integral miniaturization of inductor.Other advantage also comprises: can as required a plurality of conductors be together in series or parallel, realize the inductance value that changes; Electrode area is big, and it is firm to weld; Galvanomagnetic effect is good, can obtain perfect performance.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.In all figure, same or analogous parts are represented by identical label.
Fig. 1 is the decomposition diagram of inductor according to an embodiment of the invention;
Fig. 2 is the perspective view of the inductor shown in Figure 1 after the installation; With
Fig. 3 is the decomposition diagram that has wherein adopted the inductor of the present invention of a plurality of conductors.
Embodiment
As shown in Figure 1, inductor comprises first magnetic core 1, second magnetic core 2 and conductor 3 according to an embodiment of the invention.Preferably adopt the material of fine copper in the present embodiment, yet if necessary, also can adopt oxygen-free copper as conductor 3.First magnetic core 1 and second magnetic core 2 are the FERRITE CORE of band coating, and it can adopt MPP with high magnetic flux performance or iron powder or Ni-Zn material to make.
First magnetic core 1 is provided with the inner chamber 6 of the depressed part 4 that is used to hold conductor 3.Be equipped with groove 7 in the both sides of inner chamber 6, this groove 7 is configured such that when conductor 3 is placed inner chamber 6, but groove 7 hold electrodes portions 5, and make the height of electrode part 5 not exceed first magnetic core 1, perhaps just exceed first magnetic core 1 slightly.In this embodiment, surperficial preferred and first magnetic core 1 of electrode part 5 is surperficial substantially flush.
When assembling, first magnetic core 1, second magnetic core 2 and conductor 3 are assembled together with stacked relation, make the depressed part 4 of conductor 3 be arranged in the inner chamber 6 of first magnetic core 1, and second magnetic core 2 is arranged in depressed part 4.Available cohesive material is fixed first magnetic core 1, second magnetic core 2 and conductor 3 each other.Inductor after the installation as shown in Figure 2.
Utilize this structure, resulting inductor has the magnetic structure that closes magnetic fully, both can resist electromagnetic interference, can not produce electromagnetic interference to other device again.In addition, the thickness of this inductor can be made for very little, and the height that this has just reduced product significantly helps face and installs.
In this embodiment of the present invention, a specific description example is as described below.Second magnetic core 2 is a block, and it is of a size of 6mm * 5mm * 2mm.First magnetic core 1 also is a block, and it is of a size of 10mm * 10mm * 3.5mm, and the width of inner chamber 6 is 6mm, and depth capacity is 3mm, and the degree of depth of groove 7 is 0.5mm.Conductor 3 is the copper sheets that are of a size of 10mm * 6mm * 0.5mm, and it is bent to roughly U-shaped, makes that the width of depressed part 4 is 5.0mm, and the degree of depth is 2.5mm.Understand easily, these parts all are rounded down in suitable part.Total height after the assembling is 3.5mm.By this inductor is experimentized and can record, if inductance is 400nH, its electric current can reach DC20A.If inductance is 100nH, its electric current can reach DC40A.Therefore, the present invention has realized the inductor of a kind of miniaturization and function admirable.
In addition, needs as the case may be, conductor 3 can be for a plurality of.Be introduced as example with the situation of having used three conductors 3 below.As shown in Figure 3, in first magnetic core 1 can with the electrode part 5 contacted grooves 7 of conductor 3 on be provided with two location divisions that are spaced apart from each other 8 separately, they are divided into three sections with groove 7, so that three conductors 3 are spaced from each other.The width of each section is roughly corresponding to the width of respective conductors 3.Certainly, inner chamber 6 should be configured to hold therein these three conductors 3, and its width is corresponding to the width sum of three conductors 3 and two location divisions 8.Those skilled in the art will readily understand that regional A place that in actual use can be shown in the figure repeatedly superposes,, thereby obtain required inductance value so that the conductor 3 (for example two or more than three) of other quantity is set as required.
The present invention also provides a kind of method of making above-mentioned inductor, comprises step: (a) process in conductor 3 and have the depressed part 4 that can hold second magnetic core 2, and make the two ends oppositely outwards bending each other of conductor 3, form electrode part; (b) in first magnetic core 1, process the inner chamber 6 of the depressed part 4 that is suitable for holding conductor 3; And (c) conductor 3, second magnetic core 2 and first magnetic core 1 are assembled together, make the depressed part 4 of conductor 3 be arranged in the inner chamber 6 of first magnetic core 1, and second magnetic core 2 is arranged in depressed part 4.
Property for convenience, conductor may be made in roughly and takes the shape of the letter U.The both sides that also can be included in the inner chamber 6 of first magnetic core 1 in step (b) process groove 7, and it is used in assembling hold electrodes portion 5, and make the height of electrode part 5 not exceed first magnetic core 1, perhaps just exceed first magnetic core 1 slightly.
Use a plurality of conductors if desired, can on groove 7, process location division 8 so, be used for these conductor separation are opened.
Preferably, earlier first magnetic core 1, second magnetic core 2 and conductor 3 are carried out machine-shaping in the mill.Then conductor 3 being carried out electroplating surfaces with tin handles.First magnetic core, second magnetic core and conductor can be fixed by cohesive material, and this cohesive material is preferably epoxy resin.
More than described the present invention by concrete in detail with preferred embodiment, yet it will be understood by those of skill in the art that the present invention is not limited to described embodiment.Under the prerequisite that does not break away from the described scope of claim of the present invention, can carry out various modifications, change or adjustment to the present invention, these all belong in protection scope of the present invention.
Claims (10)
1. an inductor comprises first magnetic core (1), second magnetic core (2) and conductor (3), it is characterized in that:
Described conductor (3) comprises the depressed part (4) that is configured to hold described second magnetic core (2), and its two ends oppositely stretch out each other and form electrode part (5); With
Described first magnetic core (1) is provided with the inner chamber (6) of the depressed part (4) that is used to hold described conductor (3).
2. inductor according to claim 1 is characterized in that: described conductor (3) roughly takes the shape of the letter U.
3. inductor according to claim 1, it is characterized in that: the both sides at the described inner chamber (6) of described first magnetic core (1) are provided with groove (7), it can hold described electrode part (5) when described conductor (3) is placed described inner chamber (6), and makes the height of described electrode part (5) not exceed or slightly exceed described first magnetic core (1).
4. inductor according to claim 3 is characterized in that:
Described conductor (3) is a plurality of conductors, is provided with location division (8) on described groove (7), is used to separate described a plurality of conductor (3).
5. method of making inductor, described inductor comprises first magnetic core (1), second magnetic core (2) and conductor (3), it is characterized in that described method comprises step:
(a) in described conductor (3), process and have the depressed part (4) that can hold described second magnetic core (2), and make the two ends oppositely outwards bending each other of described conductor (3), form electrode part (5);
(b) in described first magnetic core (1), process the inner chamber (6) of the depressed part (4) that is suitable for holding described conductor (3); With
(c) described conductor (3), second magnetic core (2) and first magnetic core (1) are assembled together, make the depressed part (4) of described conductor (3) be arranged in the inner chamber (6) of described first magnetic core (1), and described second magnetic core (2) are arranged in described depressed part (4).
6. method according to claim 5 is characterized in that: described conductor (3) is made for roughly U-shaped.
7. the manufacture method of inductor according to claim 5, it is characterized in that: the both sides that described step (b) also is included in the described inner chamber (6) of described first magnetic core (1) process groove (7), and its height that is used to hold described electrode part (5) and make described electrode part (5) does not exceed or slightly exceed described first magnetic core (1).
8. the manufacture method of inductor according to claim 7 is characterized in that:
A plurality of described conductors (3) are provided, and on described groove (7), process location division (8), be used to separate described a plurality of conductor (3).
9. according to the method for each described manufacturing inductor in the claim 5 to 8, it is characterized in that: earlier described first magnetic core (1), second magnetic core (2) and conductor (3) are carried out machine-shaping, carry out surface-coated or plating then.
10. according to the method for each described manufacturing inductor in the claim 5 to 8, it is characterized in that: described first magnetic core (1), second magnetic core (2) and conductor (3) are fixed by cohesive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510116353 CN1949411A (en) | 2005-10-14 | 2005-10-14 | Inductor and mfg. method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510116353 CN1949411A (en) | 2005-10-14 | 2005-10-14 | Inductor and mfg. method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1949411A true CN1949411A (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510116353 Pending CN1949411A (en) | 2005-10-14 | 2005-10-14 | Inductor and mfg. method thereof |
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| CN (1) | CN1949411A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914008A (en) * | 2016-04-15 | 2016-08-31 | 深圳顺络电子股份有限公司 | Large current power inductor and manufacture method thereof |
| 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 |
| CN112614665A (en) * | 2020-12-03 | 2021-04-06 | 东莞沛波电子有限公司 | Large-current filter inductor convenient for efficient automatic production |
-
2005
- 2005-10-14 CN CN 200510116353 patent/CN1949411A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914008A (en) * | 2016-04-15 | 2016-08-31 | 深圳顺络电子股份有限公司 | Large current power inductor and manufacture method thereof |
| 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 |
| CN112614665A (en) * | 2020-12-03 | 2021-04-06 | 东莞沛波电子有限公司 | Large-current filter inductor convenient for efficient automatic production |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20070418 |
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