CN101499362A

CN101499362A - Combined co-mode coil

Info

Publication number: CN101499362A
Application number: CNA2008103002287A
Authority: CN
Inventors: 杨森泰
Original assignee: YIJING TECHNOLOGY Co Ltd
Current assignee: YIJING TECHNOLOGY Co Ltd
Priority date: 2008-01-28
Filing date: 2008-01-28
Publication date: 2009-08-05
Anticipated expiration: 2028-01-28
Also published as: CN101499362B

Abstract

A composite type common mode coil comprises a base which has two holding grooves and an isolation groove; a coil supporting body; and an iron core body; the isolation groove is positioned between the two holding grooves; the coil supporting body is provided with two coil frames, the outer peripheries of which are wound with a plurality of coils, moreover, the two coil frames are correspondingly arranged in the holding groove one by one; and the iron core body is provided with two corresponding sides and positioned in the isolation groove and close to the coil frames by the sides. Therefore, when the plurality of coils in each coil frame are passed through by the current respectively, the coil supporting body can be caused to form a leakage inductance, so the strength of the leakage inductance can be changed by adjusting the surface of the side.

Description

Combined co-mode coil

Technical field:

The present invention relates to a kind of combined type coil, be meant the combined co-mode coil that the surface area that can adjust the core side face is set between a kind of two coil especially.

Background technology:

Because advancing by leaps and bounds of high-tech technology especially, maked rapid progress in the field of microelectronics correlation technique processing procedure especially in recent years, so the electronic correlation product has goed deep into each family, reached in all trades and professions, becomes some indispensable in the modern life.Certainly because human wants is more and more, make electronic installation must reach the use of greater functionality relatively, electronic product is strided forward towards the target of diversification effect.Universal day by day along with various electronic equipments, TV network, switch, mobile communication equipment and office automation, electromagnetic environment in the electronic system becomes increasingly complex, the electromagnetic interference (EMI) phenomenon is serious day by day, and becomes the obvious obstacle that influences system's operate as normal.

In general common exchange type power, because main EMI interference source comes from the change action of power semiconductor assembly mostly, the EMI interference source has common-mode noise and differential mode noise mostly, therefore the electromagnetic emission EME (Electromagnetic Emission) that the produces noise signal of wideband normally, frequency range from the exchange operating frequency to several MHz.

See also shown in Figure 1ly, be common transformer circuit schematic diagram with common mode choke (choke) and differential mode choke (choke).Common transformer 2 behind a common mode choke (choke) 22 and a differential mode choke (choke) 23 to one rectifiers 24, is exported a direct current voltage source 25 after receiving an alternating-current voltage source 21.Because this common mode choke (choke) 22 and this differential mode choke (choke) the 23rd are for common-mode noise and the differential mode noise of diminishing, yet common transformer 2 is because volume is big, making is difficult for, cause cost of manufacture increase or the like factor, for making, how to go to address this problem, be the dealer urgently remains seeking solution and improvements always.

Summary of the invention:

Technical problem to be solved by this invention is: at above-mentioned the deficiencies in the prior art, a kind of combined co-mode coil is provided, utilize an iron core is set between two coil, and the surface area of iron core side can adjust, reach the effect that co-mode coil changes the leakage inductance size.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of combined co-mode coil, and it comprises a base, and it has two storage tanks and an isolation channel, and this isolation channel is positioned between two storage tanks; One coil carrying body, it has the two coil frame, this bobbin outer rim is wound with several coils, and this two coil frame one by one correspondence be arranged in this storage tank; An and iron-core workpiece, it has corresponding two side faces, this iron-core workpiece is arranged in this isolation channel, and abut bobbin with aforementioned side, when most coils in each bobbin are passed through an electric current respectively, can make described coil carrying body form a leakage inductance, utilize the surface area of adjusting described side can change described leakage inductance size.

So, utilize an iron core is set between two coil, and the surface area of iron core side can adjust, reach the effect that co-mode coil changes the leakage inductance size; And can utilize the common mode mode to design replacement differential mode mode and design, reach the effect that reduces volume and cost of manufacture.

For ease of more deep understanding being arranged, utilize an embodiment to describe in detail especially as the back to other characteristics of combined co-mode coil of the present invention and structure:

Description of drawings:

Fig. 1 is common transformer circuit schematic diagram with common mode choke (choke) and differential mode choke (choke).

Fig. 2 is the transformer preferred embodiment circuit diagram that the present invention has combined co-mode coil.

Fig. 3 is a combined co-mode coil preferred embodiment stereochemical structure decomposing schematic representation of the present invention.

Fig. 4 is a combined co-mode coil preferred embodiment stereochemical structure combination schematic diagram of the present invention.

Embodiment:

See also shown in Figure 2ly, have the circuit diagram of transformer one preferred embodiment of combined co-mode coil for the present invention.The present invention is for improving common common mode choke (choke) 22 and differential mode choke 23 because the problem that combined volume is big, making is difficult for, transformer 3 of the present invention is after receiving an alternating-current voltage source 31, via exporting a direct current voltage source 35 again behind a combined co-mode coil 32 to one rectifiers 34.Therefore, combined co-mode coil 32 of the present invention can replace the combination of common common mode choke 22 and differential mode choke 23, and integrated transformers 3 volumes are reduced.

Please consult Fig. 3 and shown in Figure 4 again, for combined co-mode coil one preferred embodiment stereochemical structure of the present invention is decomposed and the combination schematic diagram.Combined co-mode coil 1 of the present invention, it includes a base 11, a coil carrying body 12 and an iron-core workpiece 13.Described base 11 has two storage tanks 111, at least one holddown groove 112 and an isolation channel 113, and this isolation channel 113 is positioned at 111 of two storage tanks, this storage tank 111 is roughly cylinder form, and described holddown groove 112 is roughly perpendicular with the axial direction of described storage tank 111.

Described coil carrying body 12 includes: two support plate bodies 121, two cylinders 122 and two coil frame 123, this support plate body 121 is roughly the rectangle stereochemical structure, the shape of this support plate body 121 shape of holddown groove 112 therewith is corresponding, and with described holddown groove 112 ccontaining these support plate bodies 121.Described cylinder 122 is roughly cylindrical shape, and these cylinder 122 2 ends are connected with described support plate body 121 respectively.Bobbin 123 of the present invention is to form with 1231,1232 butt joints of two half coil framves, and this two

half coils frame

1231,1232 is connected forms an accommodation space 1233, the shape growth of this accommodation space 1233 causes and the relative cylindrical shape that should be of described cylinder 122 shapes, therefore, this accommodation space 1233 can ccontaining aforementioned cylinder 122.Described bobbin 123 is that its bobbin 123 outer rims are wound with most coils 1234 after forming with the butt joint of two

half coil framves

1231,1232, and this two coil frame 123 one by one correspondence be arranged in the described storage tank 111.

Described iron-core workpiece 13 is the rectangle stereochemical structure, and this iron-core workpiece 13 is made for the material of high permeability.Iron-core workpiece 13 of the present invention has corresponding two side faces 131, and the surface area of this side 131 defined with length 1311 and a height 1312 product, and its highly 1312 direction is roughly perpendicular with described isolation channel 113 bearing of trends.In the preferred embodiment of the present invention, described iron-core workpiece 13 is arranged in aforementioned isolation channel 113, and abuts this bobbin 123 with described side 131.

When most coils 1234 in each bobbin 123 pass through an electric current respectively, can make 123 on two coil frame form a leakage inductance, therefore, utilize the surface area of adjusting described side 131 can change the size of this leakage inductance.That is to say, the size of adjusting this length 1311 is the size less than described isolation channel 113, make this iron-core workpiece 13 and support plate body 121 form a gap, the size that cooperates aforementioned height 1312 again, can adjust its leakage inductance, the surface area that combined co-mode coil 1 of the present invention only need be adjusted aforementioned side 131 can change the size of this leakage inductance, reaches the effect that reduces volume and cost of manufacture.

Combined co-mode coil of the present invention thus, certain disappearance that can overcome common technique satisfies the demand of industrial circle and improves industrial competitiveness.The all dark well-off progressive of executing has the value of industry on purpose of the present invention and the effect, and is present new invention not seen before on the market, meets the novelty and the progressive important document of patent of invention, proposes the application of patent of invention in accordance with the law.

Claims

[claim 1] a kind of combined co-mode coil, it is characterized in that: it comprises

One base, it has two storage tanks and an isolation channel, and this isolation channel is positioned between two storage tanks;

One coil carrying body, it has the two coil frame, this bobbin outer rim is wound with several coils, and this two coil frame one by one correspondence be arranged in this storage tank; And

One iron-core workpiece, it has corresponding two side faces, and this iron-core workpiece is arranged in this isolation channel, and abuts bobbin with aforementioned side,

When most coils in each bobbin are passed through an electric current respectively, can make described coil carrying body form a leakage inductance, utilize the surface area of adjusting described side can change described leakage inductance size.
[claim 2] combined co-mode coil as claimed in claim 1 is characterized in that: described coil carrying body more includes two support plate bodies, reaches two cylinders, and two ends of this cylinder are connected with this support plate body respectively.
[claim 3] combined co-mode coil as claimed in claim 2 is characterized in that: described base has more at least one holddown groove, the ccontaining described support plate body of this holddown groove.
[claim 4] combined co-mode coil as claimed in claim 2 is characterized in that: described bobbin is formed by connecting by two half coil framves, and this two half coils frame is connected and forms an accommodation space, the described cylinder of this holding space for holding.
[claim 5] combined co-mode coil as claimed in claim 1 is characterized in that: the surface area of described side is defined with the product of a length and a height, and the direction of this height is roughly perpendicular with described isolation channel bearing of trend.
[claim 6] combined co-mode coil as claimed in claim 5 is characterized in that: the size of described length is less than the size of described isolation channel.
[claim 7] combined co-mode coil as claimed in claim 1 is characterized in that: described iron-core workpiece is made by the material of high permeability.