CN103500626A

CN103500626A - Inductor

Info

Publication number: CN103500626A
Application number: CN201310370324.XA
Authority: CN
Inventors: 康武闯; 李建辉; 樊应县; 高永毅; 陈益芳; 王智会
Original assignee: Shenzhen Zhenhua Ferrite and Ceramic Electronics Co Ltd
Current assignee: Shenzhen Zhenhua Ferrite and Ceramic Electronics Co Ltd
Priority date: 2013-08-22
Filing date: 2013-08-22
Publication date: 2014-01-08

Abstract

An inductor comprises a framework, a coil and a magnetic core. The coil winds the framework, the magnetic core is located in a cavity of the framework, and the coil is formed through winding of a plurality of strands of enamelled copper wires. The inductor can meet the requirements for large current, high induction amount, low direct-current resistance and miniaturization, and can be used in all products needing inductors.

Description

Inductor

Technical field

The present invention relates to electronic component, particularly relate to a kind of inductor.

Background technology

Inductor generally is comprised of skeleton, winding, radome, encapsulating material, magnetic core or iron core etc.Rated current, as a major parameter of inductance, refers to the lowest high-current value that inductor can bear under the operational environment allowed.Some high power circuits are higher to the rated current requirement of inductor, high-current inductor therefore occurred.

High-current inductor specification and shape have a variety of both at home and abroad, but the inductance value of traditional high-current inductor is all relatively low, sensibility reciprocal is a few microhenry to tens microhenrys mostly, the inductance that sensibility reciprocal reaches tens microhenrys compares less, henries up to a hundred just still less, can't reach military requirement, thereby limit its scope of application.

Summary of the invention

Based on this, be necessary to provide the inductor of a kind of large electric current, high sensibility reciprocal.

A kind of inductor, comprise skeleton, coil, magnetic core, and described coil winding is on skeleton, and described magnetic core is positioned at the cavity of skeleton, and described coil adopts the enamel covered wire coiling of multi cord.

Above-mentioned inductor, the multi cord winding method has been realized the large electric current of inductor, skeleton and magnetic core combining structure have realized the high sensibility reciprocal of inductor.

In embodiment, the model of described skeleton is the EE55 type therein, and described skeleton is provided with 20 stitch for welding.The model of skeleton has realized the compact in size of inductor, and the welding of spininess pin has guaranteed the stability of inductor when complete machine.

In embodiment, the wire diameter of described coil is greater than 1.5mm therein.

Therein in embodiment, the number of share of stock of described multi cord is more than or equal to 40 strands and be less than or equal to 80 strands.

In embodiment, described magnetic core is bonded into two " mouth " fonts by the magnetic core of two " E " shapes therein, and the bonding mode of two magnetic cores is bonding for putting the glue formula.

In embodiment, described coil and described magnetic core are bonded into one therein, and bonding mode is bonding for some glue formula.Can guarantee that like this product is not loosening.

Therein in embodiment, described skeleton top is provided with four and interconnects the protruding baffle plate that surrounds " mouth " font, wherein, with respectively be provided with respectively the line hole on two protruding baffle plates of the transverse cross-section parallel of described coil, draw at the two ends of the enamel covered wire of the described multi cord line hole from described two protruding baffle plates respectively.

In embodiment, the enamel covered wire exit cover of described multi cord has the Teflon sleeve pipe therein, and an end of described Teflon sleeve pipe extends the wicking root of the enamel covered wire of described multi cord.That the Furtulon sleeve pipe has is high temperature resistant, the effect of high insulation, it is extended to the wicking root and can guarantee the isolation of inductor when the complete machine.

In embodiment, the length that described Teflon sleeve pipe stretches into the enamel covered wire of multi cord is 5mm～10mm, can effectively guarantee that the Teflon sleeve pipe does not come off therein.

Therein in embodiment, the enamel covered wire of described multi cord is tight, parallel, winding regularly is on described skeleton.

The accompanying drawing explanation

The contour structures front elevation that Fig. 1 is an embodiment inductor;

The contour structures side view that Fig. 2 is inductor shown in Fig. 1;

The internal structure schematic diagram that Fig. 3 is inductor shown in Fig. 1.

Embodiment

Please refer to Fig. 1 and Fig. 2, is contour structures front elevation and the side view of an embodiment inductor.Inductor comprises knee copper-clad line 160, the Teflon sleeve pipe 170 of skeleton 110, coil 120, magnetic core and magnetic core bonding place 130, coil and magnetic core bonding place 140, magnetic core 150, multi cord.Coil 120 is wrapped on skeleton 110, and magnetic core 150 is positioned at the cavity of skeleton 110, and coil 120 adopts enamel covered wire 160 coilings of multi cord.

In the present embodiment, the model of skeleton 110 is the EE55 type, and its size is: 58mm*56mm*49.5mm, i.e. high 58mm, 56mm, the 49.5mm of being respectively of length and width.Realized like this compact in size.Be appreciated that the size of skeleton can change within the specific limits in other embodiments.

Skeleton 110 comprises skeleton body 111, protruding baffle plate 112 and stitch 114.Skeleton body 111 is rectangular-shaped, is provided with four protruding baffle plates 112 that are interconnected to form " mouth " font at the top of skeleton body 111." mouth " font area that four protruding baffle plates 112 surround is less than the area of skeleton body 111 upper surfaces.Be positioned at front and with two protruding plate washers 112 of positive symmetrical another side on respectively be provided with respectively two line holes 113.Draw at the two ends of the enamel covered wire 160 of the multi cord line hole 113 from described two protruding baffle plates 112 respectively.Stitch 114 is positioned at the skeleton bottom, and the number of stitch 114 is 20, is divided into two rows, 10 of every rows.Adopt the welding of spininess pin, can guarantee that inductor stability when complete machine welds is better.Be appreciated that in other embodiments, the number of stitch can fluctuate within the specific limits.

Coil 120 is wrapped in the inside of skeleton body 111, and coil 120 adopts enamel covered wire 160 winding methods of multi cord, can realize so the large electric current of inductor.For realizing the large electric current of inductor, when design, require wire diameter to be greater than 1.5mm, what adopt in the present embodiment is that 0.2mm is multiplied by the multi cord of 60 strands, the diameter of every strand is 0.2mm, always has 60 strands.In other embodiments, the number of share of stock of multi cord can change between 40 strands to 80 strands, and number of share of stock is more than or equal to 40 strands and be less than or equal to 80 strands, and the cross section of coil 120 is positive parallel with skeleton 110.

Magnetic core 150 is that the magnetic core by two " E " shapes is bonded into two " mouth " fonts, and the bonding mode of two magnetic cores is bonding for some glue formula, and vacuum need be carried out containing the paint processing in magnetic core and magnetic core bonding place 130, through hot setting formation diaphragm.Magnetic core 150 is positioned at the cavity of skeleton 110, and it and coil 120 are bonded into one, and bonding mode is bonding for a glue formula.Vacuum need be carried out containing the paint processing in coil and magnetic core bonding place 140, through hot setting, forms diaphragm.When the high sensibility reciprocal of design inductor, require the inductance coefficent of magnetic core 150 relatively high, in the present embodiment, the magnetic core magnetic permeability is 7100nH/n2.

The enamel covered wire 160 of multi cord, after the complete coil of coiling, directly extracts from line hole 113.The end cover that lays out of the enamel covered wire 160 of multi cord has Teflon sleeve pipe 170 high temperature resistant, high-insulativity.Aspect processing technology, an end of controlling Teflon sleeve pipe 170 extends the wicking root of the enamel covered wire 160 of multi cord, to guarantee the isolation of inductor when the complete machine.In addition, the length that Teflon sleeve pipe 170 stretches into the enamel covered wire 160 of multi cord is 5～10mm, can effectively guarantee that Teflon sleeve pipe 170 does not come off before complete machine.Tight, parallel, regular during enamel covered wire 160 coiling of multi cord.Can guarantee that like this sensibility reciprocal of inductor and D.C. resistance reach requirement.

Please refer to Fig. 3, is the internal structure schematic diagram of inductor shown in Fig. 1.Can be clear that stitch 114 and the coil 120 of inductor from figure.Each circle 121 has meaned coil varnish bag copper wire windings one circle, each row's circle has meaned coil varnish bag copper wire winding one deck.In the present embodiment, coil varnish copper-clad wound coil number is 36 circles, and every row is around 8 circles, and around five layers, layer 5 is not around full.Be appreciated that in other embodiments, coil varnish copper-clad wound coil number can fluctuate within the specific limits.

Above-mentioned inductor meets the test requirements document of GJB360B, and inductance value can reach 220 microhenrys, and D.C. resistance is 0.023 ohm, and rated current is 20.0 amperes.This inductor can be realized the requirement of large electric current, high sensibility reciprocal, low D.C. resistance, miniaturization, can reach military requirement, and this inductor may be used in all products that need inductor, thereby has effectively enlarged its scope of application.

The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims

1. an inductor, is characterized in that, comprises skeleton, coil, magnetic core, and described coil winding is on skeleton, and described magnetic core is positioned at the cavity of skeleton, and described coil adopts the enamel covered wire coiling of multi cord.

2. inductor according to claim 1, is characterized in that, the model of described skeleton is the EE55 type, and described skeleton is provided with 20 stitch for welding.

3. inductor according to claim 1, is characterized in that, the wire diameter of described coil is greater than 1.5mm.

4. inductor according to claim 1, is characterized in that, the number of share of stock of described multi cord is more than or equal to 40 strands and be less than or equal to 80 strands.

5. inductor according to claim 1, is characterized in that, described magnetic core is bonded into two " mouth " fonts by the magnetic core of two " E " shapes, and the bonding mode of two magnetic cores is bonding for some glue formula.

6. inductor according to claim 1, is characterized in that, described coil and described magnetic core are bonded into one, and bonding mode is bonding for a glue formula.

7. inductor according to claim 1, it is characterized in that, described skeleton top is provided with four and interconnects the protruding baffle plate that surrounds " mouth " font, wherein, with respectively be provided with respectively the line hole on two protruding baffle plates of the transverse cross-section parallel of described coil, draw at the two ends of the enamel covered wire of the described multi cord line hole from described two protruding baffle plates respectively.

8. inductor according to claim 1, is characterized in that, the enamel covered wire exit cover of described multi cord has the Teflon sleeve pipe, and an end of described Teflon sleeve pipe extends the wicking root of the enamel covered wire of described multi cord.

9. inductor according to claim 8, is characterized in that, the length that described Teflon sleeve pipe stretches into the enamel covered wire of multi cord is 5mm～10mm.

10. inductor according to claim 1, is characterized in that, the enamel covered wire of described multi cord is tight, parallel, winding regularly is on described skeleton.