CN207834095U - A kind of common mode inductance - Google Patents

Abstract

The utility model discloses a kind of common mode inductances, its key points of the technical solution are that：Including magnet ring and two groups of windings being set around on magnet ring, insulating barrier is provided in magnet ring, it further include insulating base, four lead ends of two windings are plugged on insulating base, and magnet ring both sides are both provided with annular clamping plate, are plugged on insulating base on the outer wall of two annular clamping plates, the internal diameter of two annular clamping plates is less than the internal diameter of magnet ring, it is symmetrically arranged with slot on two annular clamping plate inner walls, insulating barrier is plugged in slot, the length of insulating barrier is consistent with magnet ring inner diameter size；Prevent insulating barrier from generating stress to magnet ring by the cooperation of annular clamping plate and insulating barrier, it is ensured that the inductance value of common mode inductance will not decline.

Description

A kind of common mode inductance

Technical field

The utility model is related to electrical equipment technical fields, more specifically, it relates to a kind of common mode inductance.

Background technology

Common mode inductance (Common mode Choke), is also common mode choke, is usually used in filtering in the Switching Power Supply of computer The electromagnetic interference signal of common mode.In board design, common mode inductance is also to play EMI filtering, for inhibiting high speed signal The electromagnetic wave outside radiation-emitting that line generates.For ideal inductor models, when coil around it is complete after, all magnetic fluxs all concentrate on In the center of coil.But loop coil will not be not close around Man Yizhou or coiling under normal conditions, can cause letting out for magnetic flux in this way Leakage.There are two windings for common mode inductance, and the gap for having suitable common mode inductance big therebetween thus will produce flux leakage, and be formed Differential mode inductance.Therefore, common mode inductance generally also has certain DM EMI damping capacity.

In the prior art, common mode inductance generally comprises magnet ring and two windings being set around on magnet ring, common mode inductance and has Input high-voltage alternating common mode and output DC common-mode, the voltage levels between two windings is divided to decide whether to use insulating barrier, meanwhile, The safe distance of two windings can be ensured by increasing insulating barrier, prevent two winding contacts.And producer is to ensure consistency, Insulating barrier generally can be all added when batch production.

But in the prior art, it is to be attached at insulating barrier both ends on magnet ring inner wall using insulating cement, insulating barrier Length it is general, but can be tensioned after dispensing, can bounce back again after insulating cement cooled and solidified, and the dispensing amount of insulating cement is difficult to again It determines, causes insulating barrier that can generate certain stress to magnet ring, inductance is influenced whether when this stress exceeds allowable range Amount declines, and is unfavorable for the use of common mode inductance, and these are installation partition board unavoidable the problem of encountering.

Utility model content

In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of common mode inductance, having can Prevent the stress that insulating barrier generates magnet ring excessive, the advantages of to avoid inductance value from declining.

To achieve the above object, the utility model provides following technical solution：

A kind of common mode inductance, including magnet ring and two groups of windings being set around on magnet ring, be provided in the magnet ring insulation every Plate further includes insulating base, and four lead ends of two windings are plugged on insulating base, and the magnet ring both sides are both provided with Annular clamping plate is plugged on insulating base on the outer wall of the two annular clamping plates, and the internal diameter of the two annular clamping plates is less than magnetic The internal diameter of ring is symmetrically arranged with slot on the two annular clamping plate inner walls, is plugged with insulating barrier in the slot, it is described absolutely The length of edge partition board is consistent with magnet ring inner diameter size.

So set, limiting magnet ring abutting using annular clamping plate, and annular clamping plate is arranged with magnet ring concentric, Then insulating barrier is plugged between two annular clamping plate inner walls so that the both ends of insulating barrier can be connected to magnet ring inner wall On so that insulating barrier can just be connected in magnet ring inner wall, and insulating barrier will not generate stress to magnet ring, so that it is guaranteed that altogether The inductance value of mould inductance will not decline.

Further setting：Four of the insulating base hold and are both provided with metallic conductor on angle, under each metallic conductor End is both provided with metal ferrule, and four lead ends of two windings are fixedly connected on each metallic conductor.

So set, winding is generally made of the stronger copper wire of pliability, it is easily deformed, but in actual application It is unfavorable for passing through circuit board especially now can generally utilize reusable bread in some circuit tests copper wire Plate tested instead of disposable circuit board, and copper wire is difficult to keep being stably connected with bread board, often results in short circuit The case where occur, be convenient for common mode inductance being directly plugged on bread board using metal ferrule, and the stronger metal ferrule of rigidity It can ensure being stably connected with for inductance and bread board.

Further setting：It is both provided with caulking groove, four leads of two windings on four ends angle of the insulating base End is embedded in each caulking groove, and the metallic conductor is arranged to U-shaped, and the metallic conductor clamping is set to insulating base On the angle of four ends, each caulking groove is respectively arranged in the clamping range of four metallic conductors.

So set, the mechanical connection at winding leads end is realized by the cooperation of caulking groove and metallic conductor, without using exhausted Edge glue carries out sticking together fixation, avoids injury of the penetrating odor generated under insulating cement molten condition to producers.

Further setting：Curved support plate is provided on the insulating base, the thickness of the curved support plate is slightly larger than The thickness of magnet ring, the annular clamping plate concentric setting of the curved support plate, magnet ring and two.

So set, ensuring the safety holding distance of two annular clamping plates using curved support plate, two marmon clamps are prevented Plate causes crimp to magnet ring both sides, it is ensured that the safe handling of magnet ring.

Further setting：On the insulating base jack, the two annular clamping plates are both provided in curved support plate both sides Outer wall on be both provided with the inserted link being plugged in respectively in two jacks.

So set, realizing that annular clamping plate and the fixed of insulating base connect by jack and the inserted link being plugged in jack It connects, simple in structure, simple operation.

Further setting：It is provided with anti-slip tank on the jack inner wall, is provided on the outer wall of the inserted link and anti-slip tank The mutually protrusion of clamping setting.

So set, increasing the friction of jack and inserted link using anti-slip tank and protrusion, it is ensured that insulating base and annular clamping plate Stability, prevent annular clamping plate from being pulled insulating base easily, it is ensured that the safe handling of magnet ring.

Further setting：It is provided on the insulating base and magnet ring and annular clamping plate is covered in into internal shielding case.

So set, the anti-EMI filter effect of enhancing common mode inductance, reduces common mode inductance to extraneous electromagnetic interference, weakens electricity The interference effect that the electromagnetic field that road generates generates other elements.

Further setting：The insulating base both sides are both provided with card slot, and the shielding case lower end is provided with multiple tracks difference The fastener being connected on each card slot.

So set, realizing the quick clamping of shielding case and insulating base using card slot and fastener, simple in structure, operation is just It is prompt.

By using above-mentioned technical proposal, the utility model is compared compared with the prior art：By annular clamping plate with insulation every The cooperation of plate prevents insulating barrier from generating stress to magnet ring, it is ensured that the inductance value of common mode inductance will not decline；Utilize metal ferrule The connective stability of common mode inductance can be increased, be convenient for use of the common mode inductance in bread board circuit test.

Description of the drawings

Fig. 1 is the structural schematic diagram one of common mode inductance；

Fig. 2 is the structural schematic diagram two of common mode inductance；

Fig. 3 is the assembling schematic diagram of common mode inductance.

In figure：1, insulating base；11, card slot；12, jack；121, anti-slip tank；13, caulking groove；2, shielding case；21, fastener； 3, magnet ring；4, winding；41, lead end；5, curved support plate；6, metallic conductor；61, metal ferrule；7, annular clamping plate；71, it inserts Slot；72, inserted link；721, raised；8, insulating barrier.

Specific implementation mode

Common mode inductance is described further referring to figs. 1 to Fig. 3.

A kind of common mode inductance, in conjunction with shown in Fig. 1 and Fig. 2, including winding 4, two that 3, two groups of magnet ring is set around on magnet ring 3 Be symmetrically arranged with and be arranged with 3 concentric of magnet ring annular clamping plate 7, be plugged on two annular 7 inner walls of clamping plate for ensuring two The insulating barrier 8 of trouble free service distance and the insulating base for stablizing installation for annular clamping plate 7 and magnet ring 3 between winding 4 1, four of insulating base 1 are held the metallic conductor 6 for being both provided with u-shaped setting on angle and being clamped and fastened on insulating base 1, It is provided in the downward one side of metallic conductor 6 for stablizing installation common mode inductance in the metal ferrule 61 on bread board circuit, two Four lead ends 41 of a winding 4 are respectively fixedly connected between insulating base 1 and metallic conductor 6；Wherein, on insulating base 1 It is connected with and magnet ring 3 and annular clamping plate 7 is covered at into the internal shielding case for reducing common mode inductance to extraneous electromagnetic interference 2,1 both sides of insulating base are both provided with card slot 11, and 2 lower end of shielding case is provided with the card that multiple tracks is connected in respectively on each card slot 11 Part 21.

In conjunction with shown in Fig. 2 and Fig. 3, two annular 7 inner diameters of clamping plate are arranged less than 3 inner diameter of magnet ring, two annulars Slot 71 is symmetrically arranged on the inner wall of clamping plate 7, insulating barrier 8 is plugged in slot 71, and the length of insulating barrier 8 is in magnet ring 3 inner diameters are consistent, are provided on insulating base 1 with the setting of 3 concentric of magnet ring for preventing two annular clamping plates 7 to magnet ring 3 The curved support plate 5 squeezed is caused, is both provided with jack 12, two annular clamping plates in 5 both sides of curved support plate on insulating base 1 The inserted link for being plugged in and being fixedly connected with insulating base 1 for realizing two annular clamping plates 7 in jack 12 is both provided on 7 outer wall 72；Wherein, the thickness of curved support plate 5 is more than the thickness of magnet ring 3, and caulking groove 13 is both provided on four ends angle of insulating base 1, Four lead ends 41 of two windings 4 are embedded in respectively in each caulking groove 13, and caulking groove 13 is set to the clamping of each metallic conductor 6 In range, it is both provided with anti-slip tank 121 on the inner wall of two jacks 12, is both provided on the outer wall of two inserted links 72 and anti-slip tank 121 protrusions 721 that mutually clamping is arranged.

When assembling common mode inductance, one of annular fixation of clamping plate 7 is plugged on insulating base 1 first, it then will be around If the magnet ring 3 of two windings 4 is placed on annular clamping plate 7, and makes magnet ring 3 abut setting with curved support plate 5, place After magnet ring 3, then another annular clamping plate 7 is plugged on insulating base 1, and insulating barrier 8 is plugged in two annular clamping plates 7 Inner wall between, at this point, 8 upper and lower ends of insulating barrier abut setting with 3 inner wall of magnet ring, and two groups of windings 4 are spaced apart.

After fixing magnet ring 3, four lead ends 41 of magnet ring 3 are respectively embedded into four caulking grooves 13, then utilize metal Lead end 41 is clamped and fastened on insulating barrier 8 by conductor 6, finally, shielding case 2 and insulating base 1 is clamped so that magnet ring 3 2 inside of shielding case is covered at annular clamping plate 7.

The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to Above-described embodiment, technical solution belonging to the idea of the present invention belong to the scope of protection of the utility model.It should refer to Go out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.

Claims (8)

1. a kind of common mode inductance, including magnet ring（3）It is set around magnet ring with two groups（3）On winding（4）, the magnet ring（3）Inside set It is equipped with insulating barrier（8）, it is characterised in that：It further include insulating base（1）, two windings（4）Four lead ends（41）It inserts It is connected to insulating base（1）On, the magnet ring（3）Both sides are both provided with annular clamping plate（7）, the two annular clamping plates（7）Outer wall On be plugged in insulating base（1）On, the two annular clamping plates（7）Internal diameter be less than magnet ring（3）Internal diameter, two marmon clamps Plate（7）Slot is symmetrically arranged on inner wall（71）, the slot（71）Inside it is plugged with insulating barrier（8）, the insulating barrier （8）Length and magnet ring（3）Inner diameter size is consistent.

2. a kind of common mode inductance according to claim 1, it is characterised in that：The insulating base（1）Four end angle on It is both provided with metallic conductor（6）, each metallic conductor（6）Lower end is both provided with metal ferrule（61）, two windings（4）'s Four lead ends（41）It is fixedly connected in each metallic conductor（6）On.

3. a kind of common mode inductance according to claim 2, it is characterised in that：The insulating base（1）Four end angle on It is both provided with caulking groove（13）, two windings（4）Four lead ends（41）It is embedded in each caulking groove（13）It is interior, the metal Conductor（6）It is arranged to U-shaped, the metallic conductor（6）Clamping is set to insulating base（1）Four end angle on, it is each described embedding Slot（13）It is respectively arranged at four metallic conductors（6）Clamping range in.

4. a kind of common mode inductance according to claim 1, it is characterised in that：The insulating base（1）On be provided with arc Support plate（5）, the curved support plate（5）Thickness be slightly larger than magnet ring（3）Thickness, the curved support plate（5）, magnet ring （3）And two annular clamping plates（7）Concentric is arranged.

5. a kind of common mode inductance according to claim 4, it is characterised in that：The insulating base（1）On in curved support Plate（5）Both sides are both provided with jack（12）, the two annular clamping plates（7）Outer wall on be both provided with and be plugged in two jacks respectively （12）Interior inserted link（72）.

6. a kind of common mode inductance according to claim 5, it is characterised in that：The jack（12）It is provided on inner wall anti-skidding Slot（121）, the inserted link（72）Outer wall on be provided with and anti-slip tank（121）The mutually protrusion of clamping setting（721）.

7. a kind of common mode inductance according to claim 1, it is characterised in that：The insulating base（1）On be provided with magnetic Ring（3）And annular clamping plate（7）Cover in internal shielding case（2）.

8. a kind of common mode inductance according to claim 7, it is characterised in that：The insulating base（1）Both sides are both provided with Card slot（11）, the shielding case（2）Lower end is provided with multiple tracks and is connected in each card slot respectively（11）On fastener（21）.