CN203433952U

CN203433952U - Inductor structure

Info

Publication number: CN203433952U
Application number: CN201320348393.6U
Authority: CN
Inventors: 赵宜泰
Original assignee: Individual
Current assignee: Kunshan Maji Electronics Co ltd
Priority date: 2013-06-18
Filing date: 2013-06-18
Publication date: 2014-02-12
Anticipated expiration: 2023-06-18

Abstract

The utility model discloses an inductor structure, comprising a powder core sintering body, a coil and a wrapping body. The powder core sintering body is in an inverted T shape, the powder core sintering body has a bottom part, a convex column is extending on the bottom part, and a placing space is arranged between the convex column and the bottom part. The coil is wound to form a winding body which is sleeved on the convex column and located in the placing space, and the winding body is provided with two electrode pins that extend to a bottom side edge. The wrapping body is provided with a groove in an inverted T shape, the groove is used for accommodating the powder core sintering body and the coil, the powder core sintering body and the coil are wrapped by the wrapping body and are not exposed, and the two electrode pins of the winding body extend to outside the wrapping body. The inductor structure in the utility model has the advantages of high current resistance and high heat resistance, and can prevent occurrence of a leakage current phenomenon.

Description

Inductor structure

Technical field

The utility model relates to a kind of inductor, and espespecially a kind of have high, a heat-resisting high inductor structure of resistance to electric current.

Background technology

Inductor is a kind of of passive component, has the electronic building brick of resisting any curent change, and the iron core material that it support by coil winding is formed, and iron core material can be magnetic material or nonmagnetic substance.Inductor is to change by coil current, to produce magnetic flux change, and the circuit unit of making according to the phenomenon in magnetic field, wherein the source in magnetic field is that electric charge is flowing, it is exactly that electric current forms.The electric current exchanging can produce magnetic field, and the magnetic field of change can induce electric current, the ratio of its linear relationship, and we are called inductance.

Traditional knockdown inductor, it is mainly the I-shaped iron core with a manganese-zinc ferrite, coil winding, on this I-shaped iron core, then is loaded on the I-shaped iron core group that is wound with coil in the lid that one section is U font, to form knockdown inductor.Because the permeability of this knockdown inductor is high, saturated magnetic force is low, easily saturated in use, cannot resistance to large electric current, be not therefore used.

Current inductor is all that requirement can resistance to large electric current, and therefore most inductor is as choke or anti-current device.The making of this inductor is to utilize powder compaction to form, be wound around in advance an air core coil, air core coil is positioned in mould, iron powder is poured in this mould and is pressed into after an inductor with this coil, the practice of this kind of powder compaction makes permeability low, saturated magnetic force is high, in use inductor be difficult for saturated, can resistance to larger electric current.

Another kind of powder compaction, when making, first make an air core coil, air core coil is placed in mould, by adding, there is the iron powder of macromolecular material colloid to pour in mould, utilize every square centimeter of compacting of the high pressure with 6 ~ 8 ton force amounts to form, in manufacturing process, easily make the insulating varnish on coil be racked, cause coil short circuit between layers, cause the generation of large electric current.

Another powder compaction, to adopt the pedestal that siderochrome Si powder (FeCrSi) is first hot pressed into a convex shape, at the coil that winding is completed, be nested with on the projection at this pedestal, recycling hot forming technology is compressed on this pedestal siderochrome silicon (FeCrSi) to be coated on the projection of this coil and this pedestal, only make the bottom of pedestal expose, the production method of this kind of inductor easily produces leakage phenomenon.

Another powder compaction, is first to make an air core coil and a lead frame, air core coil and lead frame is placed in mould, then iron powder is poured in mould and first carried out after mold pressing, then after hot-pressing processing, complete the making of inductor.Because the spare part of this kind of inductor is more, therefore on making, also relatively take a lot of work order and man-hour.

Utility model content

In view of this, the technical problems to be solved in the utility model is to provide a kind of inductor structure, and it is high that this inductor structure has resistance to electric current, heat-resisting height.

Another object of the present utility model, this coil and this powder core sintered body are coated in this cladding, can avoid producing leakage phenomenon.

An object more of the present utility model, is to utilize mixing processing procedure lower than general iron powder mold pressing in iron loss.

For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that a kind of inductor structure, and it comprises: a powder core sintered body, become convex shape, this powder core sintered body has a bottom, is extended with a projection on this bottom, between this projection and this bottom, has a shallow storage space; One coil, reel to form a coiling body, and this coiling body cover, as on this projection and be positioned in this shallow storage space, has two electrode pins and extends on this bottom on this coiling body; One cladding, has the groove of a convex shape on it, accommodating this powder core sintered body of this groove and this coil, and coated this powder core sintered body of this cladding and this coil do not expose, and it is outside that two electrode pins of this coiling body extend to this cladding.

As preferred version, magnetic permeability mu=60 of this powder core sintered body.

As preferred version, this coil is copper coil.

As preferred version, two electrode pins of this coiling body extend to the place, diagonal angle of this cladding.

As preferred version, the DC impedance of this inductor is 0.72mohm.

The technique effect that the utility model reaches is as follows:

1, to have resistance to electric current high for the utility model inductor structure, heat-resisting height.

2, this coil and this powder core sintered body are coated in this cladding, can avoid producing leakage phenomenon, safe and reliable.

3, be to utilize mixing processing procedure lower than general iron powder mold pressing in iron loss, thereby can reduce the wastage, energy savings.

Accompanying drawing explanation

Fig. 1 is that inductor of the present utility model is made schematic flow sheet;

Fig. 2 is the powder core sintered body schematic diagram of the utility model inductor structure;

Fig. 3 puts coil schematic diagram on the powder core sintered body of the utility model inductor structure;

Fig. 4 is coated this powder core sintered body of cladding of the utility model inductor structure and the cross-sectional schematic of this coil;

Fig. 5 is the utility model inductor structure stereoscopic schematic diagram.

[symbol description]

Step 100 ~ 108

Powder core sintered body 1

Projection 11

Bottom 12

Accommodation space 13

Coil 2

Coiling body 21

Electrode pin 22

Cladding 3

Groove 31.

Embodiment

Referring to Fig. 1 ~ Fig. 4, is making flow process and the induction structure knot body schematic diagram of inductor of the present utility model.As shown in the figure: the manufacture method of inductor of the present utility model, first, as step 100, has iron Si powder material (FeSi).

Step 102, thermosetting is made, and utilizes thermosetting to make above-mentioned iron Si powder and is pressed into a convex shape powder core.

Step 104, sintering, the convex shape powder core that described compacting is completed carries out sintering, after low-temperature sintering, make this convex shape powder core form powder core sintered body 1, on powder core sintered body 1, there is a bottom 12, on bottom 12, be extended with a projection 11, between bottom 12 and projection 11, there is an accommodation space 13.In this is graphic, powder core sintered body 1 utilizes sintering technology, makes magnetic permeability mu=60.

Step 106, have the coil 2 that a coiling completes, coil 2 is reeled and is formed coiling body 21, and the coiling body 21 forming of reeling is nested with on the projection 11 of powder core sintered body 1 (as shown in Figure 3), and two electrode pins 22 of coiling body 21 extend to the place, side diagonal angle of the bottom 12 of this powder core sintered body 1.In this is graphic, coil 2 is copper coil.

Step 108, have stainless steel material, first cover there is is the powder core sintered body 1 of coil 2 to be placed in mould (not shown), utilize metal ejection formation processing procedure by this stainless steel material ejection formation on powder core sintered body 1, and on coated coil 2 and powder core sintered body 1, form a cladding 3 (as shown in Figure 4), the two upper electrode pins 22 of coil 2 extend to the outside at the place, diagonal angle of cladding 3, and the two electrode pins 22 that extend to the coil 2 of cladding 3 outsides can be electrically connected on circuit board (not shown) for inductor.In this is graphic.This stainless steel material is siderochrome silicon (FeCrSi) material with magnetic permeability mu=14 ~ 18.

Powder core sintered body 1 is to adopt iron Si powder sintering to make magnetic permeability mu=60.Because permeability is high, 2 of coils around the number of turns few, iron loss is lower than general iron powder mold pressing (molding), makes DC impedance DCR (DC Resistance) little (about 0.72mohm), therefore electric current is little, has the high and heat-resisting high characteristic of resistance to electric current.And, with cladding 3, powder core sintered body 1 and coil 2 are completely coated and are not exposed, can avoid producing leakage phenomenon.

Refer to Fig. 4 and Fig. 5, for inductor structure of the present utility model is analysed and observe and stereoscopic schematic diagram.As shown in the figure: the utility model inductor structure, comprising: a powder core sintered body 1, a coil 2 and a cladding 3.

Powder core sintered body 1, the powder core sintered body 1 of one-tenth convex shape.Powder core sintered body 1 has a bottom 12, is extended with a projection 11 on bottom 12, has a shallow storage space 13 between projection 11 and bottom 12.In this is graphic, the iron Si powder material (FeSi) that powder core sintered body 1 is magnetic permeability mu=60.

Coil 2, reel to form a coiling body 21, and coiling body 21 covers, as on projection 11 and be positioned in shallow storage space 13, separately have the two electrode pins 22 that extend to 12 places, side diagonal angle, bottom on coiling body 21.In this is graphic, coil 2 is copper wire material.

Cladding 3, the groove 31 on it with a convex shape, groove 31 is with accommodating powder core sintered body 1 and coil 2, with cladding 3, do not expose powder core sintered body 1 and coil 2 is coated, only for two electrode pins 22, expose to the outside at the place, diagonal angle of cladding 1, can avoid producing leakage phenomenon and two electrode pins 22 can be electrically connected on circuit board (not shown) for inductor.In this is graphic.This stainless steel material is siderochrome silicon (FeCrSi) material, its magnetic permeability mu=14 ~ 18.

Powder core sintered body 1 is to adopt iron Si powder sintering to make magnetic permeability mu=60.Because permeability is high, 2 of coils around the number of turns few, iron loss is lower than general iron powder mold pressing (molding), makes DC impedance DCR (DC Resistance) little (about 0.72mohm), therefore electric current is little, has the high and heat-resisting high characteristic of resistance to electric current.

The above, be only preferred embodiment of the present utility model, is not intended to limit protection range of the present utility model.

Claims

1. an inductor structure, is characterized in that, it comprises:

One powder core sintered body, becomes convex shape, and this powder core sintered body has a bottom, is extended with a projection on this bottom, between this projection and this bottom, has a shallow storage space;

One coil, reel to form a coiling body, and this coiling body cover, as on this projection and be positioned in this shallow storage space, has two electrode pins and extends on this bottom on this coiling body;

One cladding, has the groove of a convex shape on it, accommodating this powder core sintered body of this groove and this coil, and coated this powder core sintered body of this cladding and this coil do not expose, and it is outside that two electrode pins of this coiling body extend to this cladding.

2. inductor structure according to claim 1, is characterized in that, magnetic permeability mu=60 of this powder core sintered body.

3. inductor structure according to claim 2, is characterized in that, this coil is copper coil.

4. inductor structure according to claim 3, is characterized in that, two electrode pins of this coiling body extend to the place, diagonal angle of this cladding.

5. inductor structure according to claim 4, is characterized in that, the DC impedance of this inductor is 0.72mohm.