CN203444906U

CN203444906U - Structure of inductor

Info

Publication number: CN203444906U
Application number: CN201320552314.3U
Authority: CN
Inventors: 赵宜泰
Original assignee: Individual
Current assignee: Kunshan Maji Electronics Co ltd
Priority date: 2013-09-06
Filing date: 2013-09-06
Publication date: 2014-02-19
Anticipated expiration: 2023-09-06

Abstract

The utility model relates to a structure of an inductor. The structure of the inductor comprises two iron cores, two insulating layers, two coils, at least one gasket, two electrode ends and a closed-flux structure, wherein the two iron cores are connected in parallel connection, and at least one air gap is formed between the two iron cores; the two insulating layers are arranged on the surfaces of the two iron cores; the coils are arranged on the two iron cores in a wound mode in opposite winding directions, and the two coils are electrically connected in parallel; the gasket is arranged in the air gap; the two electrode ends are electrically connected with the two coils. According to the structure of the inductor, the two iron cores and the two coils are connected in parallel to enable a magnetic loop to be in an annular shape, and therefore inner resistance values of the two coils are reduced; when the inner resistance values are reduced due to parallel connection and currents flow through the coils, generation of heat sources can be reduced, and copper loss can also be reduced.

Description

The structure of inductor

Technical field

The utility model is about a kind of inductor, espespecially a kind of structure of take the inductor that iron core connects as parallel way.

Background technology

Inductor is a kind of of passive device, has the electronic component 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 element 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.

Current inductor is all that requirement can resistance to large electric current, and therefore most inductor is choke or anti-current device.The making of this inductor is to utilize powder compaction to form, and is first wound around an air core coil, and air core coil is positioned in mould, and iron powder is poured in this mould and is pressed into an inductor with this coil.Another kind of powder compaction, first to adopt siderochrome Si powder (FeCrSi) to be hot pressed into the pedestal of a convex shape, the coil again winding being completed is placed on the projection of this pedestal, then utilize hot forming technology that siderochrome silicon (FeCrSi) is compressed on this pedestal to be coated on the projection of this coil and this pedestal, to complete the making of inductor.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.

During due to above-mentioned inductor power transmission, when electric current flowing through coil (enamel covered wire), coil (enamel covered wire) has resistance (internal resistance), can make inductor heating, and this thermal source is exactly that copper loss is lost.Copper loss is directly proportional to current squaring, during no-load current, without copper loss.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of structure of inductor.

For reaching above-mentioned object, the utility model provides a kind of structure of inductor, comprising:

Two iron cores, its with and connect configuration, between this two iron core, form at least one air gap;

Two insulating barriers, it is located on the surface of this two iron core;

Two coil, it is wound on this two iron core with contrary winding direction, and this two coil is electrically and is connected in parallel;

Two electrode tips, itself and this two coil is electrically connected; And

At least one pad, it is disposed in this air gap;

Wherein, at this two coil, be wrapped in the opposite direction on this two iron core, and after being and being electrically connected in parallel, making the magnetic circuit of this inductor is toroid, reduces the resistance value of this two coil, reduces copper loss and lose.

As preferred version, wherein on this two iron core, respectively there is a wound portion that is cylindric or cubic, the two ends of this wound portion respectively have a stopper being rectangle, and this stopper one side has a groove, and this two iron core engages the air gap that is formed with this pad of installation.

As preferred version, wherein this two iron core is I font, and this two iron core consists of iron silicon materials.

As preferred version, wherein this insulating barrier is insulating varnish.

As preferred version, wherein this two electrode tip is positioned at a side of this two iron core, and this electrode tip consists of a bronze medal layer and a silver layer of being located on copper layer, or the tin layer of being located on this silver layer by a silver layer and forms.

As preferred version, wherein this two coil is respectively provided with two links, and this two link is passed to be by this groove and is connected in parallel.

As preferred version, wherein this two coil is enamel covered wire.

As preferred version, wherein this pad is plastic sheet.

As preferred version, the structure of wherein said inductor more includes a closed-flux structure, and it is located on this two coil.

As preferred version, wherein this closed-flux structure is magnetic plastic structure.

The structure of inductor provided by the utility model, its two iron core and two coil are with parallel way, and making magnetic loop is annular, thereby reduces the internal resistance value of two coil; At internal resistance value, during because of in parallel reduction and during electric current flowing through coil, can reduce thermal source and produce, also can reduce copper loss mistake.

Accompanying drawing explanation

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

Fig. 2 is two iron core stereoscopic schematic diagrames of the present utility model;

Fig. 3 is making electrode tip schematic diagram of the present utility model;

Fig. 4 is that two coil of the present utility model is wound in the two iron cores schematic diagram that is connected in parallel;

Fig. 5 settles pad schematic diagram between two iron cores of the present utility model;

Fig. 6 is sealing stereoscopic schematic diagram after the pad of Fig. 5 is settled.

[main element symbol description]

Iron core-1; Step-100 ~ 110; Wound portion-11; Stopper-12; Air gap-13; Groove-14;

Electrode tip-2;

Coil-3; Link-31;

Pad-4;

Closed-flux structure-5;

Insulating barrier-6.

Embodiment

Relevant the technical content and a detailed description of the present utility model, now coordinate accompanying drawing to be described as follows.

Refer to Fig. 1, Fig. 2, for inductor of the present utility model is made flow process and two iron core schematic appearance.As shown in the figure: inductor of the present utility model is when making, first, as step 100, have two iron cores 1 that are I font, the wound portion 11 on this iron core 1 with a cylindric or cubic, the two ends of this wound portion 11 respectively have a stopper being rectangle 12, and a side of leading portion 12 in this has a groove 14.In this figure, this iron core 1 consists of iron silicon materials (FeSi), utilizes thermosetting technology and sintering technology, makes magnetic permeability mu=125 (as shown in Figure 2) of iron core 1.

Step 102, insulating barrier is made, and after this iron core 1 is made, is manufactured with an insulating barrier 6 (as shown in Figure 3) on this iron core 1 surface.In this figure, this insulating barrier 6 is insulating varnish.

Step 104, makes electrode tip, to utilize printing technology to print a bronze medal layer, then electroplates a silver layer on this copper layer, or prints after a silver layer, then in the mode of electrotinning, make electrode tip 2 (as Fig. 3) on this silver layer.

Step 106, winding around, two coil 3 is wound in the wound portion 11 of two iron cores 1, and two coil 2 is wound in the opposite direction in wound portion 111, after this two coil 3 is wound around, on it, respectively have two links 31, this two link 31 is passed by the groove 14 of this stopper 12, after two links 31 of two coil 3 are connected in parallel, be electrically connected with two electrode tips 2 again, form the state (as shown in Figure 4) that is connected in parallel.

Step 108, make air gap and pad, after above-mentioned two coil is connected in parallel, two stoppers 12 of this two iron core 1 and groove 14 are and between reciprocal side, are formed with an air gap (air gap) 13, in this air gap 13, install or be fitted with a pad 4, the size of this air gap 13 of the THICKNESS CONTROL of this pad 4, to control the magnetic saturation state (as shown in Figure 5) of inductor.In this figure, this pad 4 is plastic sheet.

Step 110, sealing, after pad 4 installations, with on the region of coated this two coil (bare wire) 3 of magnetic glue to form a closed-flux structure 5, after this closed-flux structure 5 is made, form a sheet or block inductor (as shown in Figure 6).In this figure, this closed-flux structure 5 can avoid producing leakage field phenomenon.

Because this two coil 3 is wound in the opposite direction of wound portion 11, after two coil 3 is electrically in parallel, during energising, making the magnetic circuit of these two coil 3 circulations is toroid.When electric current is flowed through two coil (enamel covered wire), because two coil 3 has resistance (internal resistance), can generate heat, heat is exactly loss, is also copper loss.Copper loss is directly proportional to current squaring, during no-load current, without copper loss.So when internal resistance value forms state in parallel, (for example, the internal resistance value of single inductance element is 10 Ω, after two inductance elements are connected in parallel, internal resistance value becomes 5 Ω) time reduce internal resistance value, also be to lose reducing copper loss, make the inductor can be not overheated, make the characteristic of inductance more.

Referring to Fig. 5, Fig. 6, is sealing stereoscopic schematic diagram after settling the pad of pad and Fig. 5 to settle between two inductance elements of the present utility model.As shown in the figure: inductor structure of the present utility model, comprising: two iron cores 1, two insulating barriers 6, two electrodes 2, two coil 3, two pads 4 and a closed-flux structure 5.

This two iron core 1, has a wound portion 11 that is cylindric or cubic on it, the two ends of this wound portion 11 respectively have a stopper being rectangle 12, and a side of this stopper 12 has a groove 14.This two iron core 1 is also abutted against while closing, and between two stoppers 12 of this two iron core 1 and the reciprocal side of groove 14, is formed with an air gap 13, and this air gap 13 is to control inductor magnetic saturation state.In this figure, this iron core 1 is I font, forms magnetic permeability mu=125 with iron silicon materials (FeSi).

This two insulating barrier 6, is located on the surface of this iron core 1.In this figure, this insulating barrier 6 is insulating varnish.

This two electrode tip 2, is positioned at a side of this two iron core 1, and the silver layer that this electrode tip 2 is located on this copper layer by a bronze medal layer and forms, or the tin layer of being located on this silver layer by a silver layer and forms.

This two coil 3, be wound around and be located in the wound portion 11 of this iron core 1 separately, and the opposite direction that two coil 2 is wound around, this two coil 3 is respectively provided with two links 31, and each two link 31 of this two coil 3 is electrically connected and forms state in parallel through this groove 14 with this electrode tip 2.In this figure, this two coil 2 is enamelled wire.

This two pad 4, installs or fits in this air gap 13, and the thickness of this pad 4 is set the spacing size of air gap 13, controls the magnetic saturation state of inductor.In this figure, this pad 4 is plastic sheet.

This closed-flux structure 5, is located on this two coil 3, after this closed-flux structure 5 is coated, forms sheet or block inductor.In this figure, this closed-flux structure 5 is magnetic plastic structure, can avoid producing leakage field phenomenon.

After the inductor of chip type completes, this two electrode tip 2 exposes, and can be for this inductor with surface adhering technical, be welded on circuit board (not shown).

The above; it is only preferred embodiment of the present utility model; not in order to limit scope of patent protection of the present utility model, therefore such as use the variations such as equivalence techniques that the utility model patent spirit does, means, all should in like manner all be contained in scope of patent protection of the present utility model.

Claims

1. a structure for inductor, is characterized in that, comprising:

Two insulating barriers, it is located on the surface of this two iron core;

Two electrode tips, itself and this two coil is electrically connected; And

At least one pad, it is disposed in this air gap;

Wherein, after this two coil is wound in the opposite direction on this two iron core and is and is electrically connected in parallel, the magnetic circuit of this inductor is toroid.

2. structure as claimed in claim 1, it is characterized in that, on this two iron core, respectively there is a wound portion that is cylindric or cubic, the two ends of this wound portion respectively have a stopper being rectangle, one side of this stopper has a groove, and this two iron core engages the air gap that is formed with this pad of installation.

3. structure as claimed in claim 2, is characterized in that, this two iron core is I font, and this two iron core consists of iron silicon materials.

4. structure as claimed in claim 3, is characterized in that, this two insulating barrier is insulating varnish.

5. structure as claimed in claim 4, is characterized in that, this two electrode tip is positioned at a side of this two iron core, and this electrode tip consists of a bronze medal layer and a silver layer of being located on copper layer, or the tin layer of being located on this silver layer by a silver layer and forms.

6. structure as claimed in claim 5, is characterized in that, this two coil is respectively provided with two links, and this two link is passed to be by this groove and is connected in parallel.

7. structure as claimed in claim 6, is characterized in that, this two coil is enamel covered wire.

8. structure as claimed in claim 7, is characterized in that, this pad is plastic sheet.

9. structure as claimed in claim 8, is characterized in that, more includes a closed-flux structure, and it is located on this two coil.

10. structure as claimed in claim 9, is characterized in that, this closed-flux structure is magnetic plastic structure.