CN209199712U - Filter - Google Patents
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- CN209199712U CN209199712U CN201822278823.7U CN201822278823U CN209199712U CN 209199712 U CN209199712 U CN 209199712U CN 201822278823 U CN201822278823 U CN 201822278823U CN 209199712 U CN209199712 U CN 209199712U
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- ferrite
- filter
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 2
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- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model discloses a kind of filters, the filter includes: magnet ring, and magnet ring includes multiple ferrites, and each ferrite is non-close in the circumferential, multiple sliceable formation of the ferrite are circumferential closed cyclic structures, forms passing channel between multiple ferrites；Shell, the shell includes multiple sub- shells, each sub- shell is non-close in the circumferential, multiple sub- circumferentially upper closed cyclic structures of the sliceable formation of shell, the shell housing is in the outside of the magnet ring, each sub- shell includes the first conductive segment, the second conductive segment and be connected between first conductive segment and second conductive segment non-conductive section, multiple first conductive segments are spliced to form the first conducting ring, multiple second conductive segments are spliced to form the second conducting ring, and multiple described non-conductive sections are spliced to form non-conducting loops.Filter according to the present utility model will not only destroy cable, and its good in anti-interference performance during installation.
Description
Technical field
The utility model relates to wave filter technology fields, more particularly, to a kind of filter.
Background technique
The life of modern society and the electromagnetic environment of industrial site become increasingly complex, and live electrical equipment has not
Same working frequency range, to prevent electromagnetic interference from entering electrical system by feed cable, usually in various electrical equipments extensively
Use the filter that can filter out noise.
Filter in the related technology is when in use, it usually needs cable is truncated, then filter accesses cable,
This mounting means can not only damage cable, and install operation and be inconvenient.
To solve the above-mentioned problems, a kind of electromagnetic interface filter of separate type is suggested at present, referring to shown in attached drawing 1, this point
Electromagnetic interface filter from formula includes: two separation magnets 10 (ferrite), and two separation magnets 10 constitute magnet ring, outside two separation magnets 10
Side is provided with openable and closable rubber shell 20, and the both ends of rubber shell 20 are provided with oval opening 30, in use, the electromagnetic interface filter is fastened
In on cable.
Although the filter of this type do not have to by cable truncation and it is easy for installation, there is distributions between its conducting wire
Capacitor, capacitive reactance is smaller when high frequency, and High-frequency Interference will be ineffective by direct-coupling, magnet ring；Furthermore when High-frequency Interference energy is higher
When, magnetic hystersis loss and eddy-current loss are excessive in magnet ring, will lead to magnet ring temperature and rise rapidly, because of the curie point of Ferrite Material
(magnetic material loses ferromagnetic temperature) is lower, once temperature is excessively high up to or over curie point, Ferrite Material meeting
It loses magnetism immediately, magnet ring also can be ineffective.The electromagnetic interface filter of i.e. this kind separate type, although do not have to by cable truncation and
It is easy for installation, but its interference free performance is poor.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model
One purpose is to propose that filter, the filter will not only destroy cable, and its interference free performance during installation
It is good.
One embodiment according to the present utility model, comprising: magnet ring, the magnet ring include multiple ferrites, each described
Ferrite is non-close in the circumferential, multiple circumferentially upper closed cyclic structures of the sliceable formation of ferrite, multiple
Passing channel is formed between the ferrite；Shell, the shell include multiple sub- shells, and each sub- shell is in the circumferential
It is non-close, multiple sub- circumferentially upper closed cyclic structures of the sliceable formation of shell, the shell housing is described
The outside of magnet ring, each sub- shell include the first conductive segment, the second conductive segment and be connected to first conductive segment and
Non-conductive section between second conductive segment, multiple first conductive segments are spliced to form the first conducting ring, and multiple described
Two conductive segments are spliced to form the second conducting ring, and multiple described non-conductive sections are spliced to form non-conducting loops.
According to the filter of the utility model embodiment, cable will not be not only destroyed during installation, and at the same time can be real
Now to the consumption of interference noise (resistance characteristic of ferrite bead), reflection (inductance characteristic of ferrite bead), release (two
Distribution capacity), good in anti-interference performance.
In addition, can also have following additional technical feature according to the filter of the utility model embodiment:
One embodiment according to the present utility model, the ferrite and the sub- shell are respectively formed arc-shaped.
One embodiment according to the present utility model, multiple ferrites and multiple sub- shells correspond phase
Even.
One embodiment according to the present utility model, the axial ends of the sub- shell are respectively equipped with axially position part, and two
A axially position part is abutted with the ferritic axial ends face respectively.
One embodiment according to the present utility model, the circumferential both ends of the sub- shell are respectively equipped with circumferentially positioned part, and two
A circumferentially positioned part is abutted with the ferritic circumferential both ends of the surface respectively.
One embodiment according to the present utility model, the circumferential end faces of the sub- shell and the ferritic circumferential end faces
Concordantly, the circumferentially positioned part is extended by the circumferential end faces of the sub- shell towards the ferrite, the ferritic circumferential direction
Accommodation groove is formed on end face, the circumferentially positioned part is placed in the accommodation groove, so that the circumferentially positioned part and the iron
The circumferential end faces of oxysome are concordant.
It is convex that one of them of one embodiment according to the present utility model, the ferrite and sub- shell are equipped with cooperation
It rises, another in the ferrite and sub- shell is equipped with mating groove.
One embodiment according to the present utility model, the fitting projection or the mating groove are set to described non-conductive section
On.
One embodiment according to the present utility model, it is outer on first conducting ring to be cased with the first conductive fastener to fasten
Multiple first conductive segments, outer on second conducting ring to be cased with the second conductive fastener conductive to fasten multiple described second
Section.
One embodiment according to the present utility model, first conductive fastener and second conductive fastener are
The spiral shell with conductive nut cooperation is equipped on the periphery wall of conductive nut, first conducting ring and second conducting ring
Line.
The periphery wall of one embodiment according to the present utility model, first conducting ring is equipped with cricoid conductive stud
Disk, when the filter is arranged on conductive mounting matrix, the conductive stud disk is connected to the one of the conductive mounting matrix
Side, second conductive fastener are connected to the other side of the conductive mounting matrix.
The number of one embodiment according to the present utility model, the ferrite and the sub- shell is two.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will
Become obvious and be readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of the electromagnetic interface filter of separate type in the prior art；
Fig. 2 is that the conductive mounting matrix (portion of electrical box is installed on according to the filter of the utility model one embodiment
Exceptionally shell) on structural schematic diagram；
Fig. 3 is the schematic diagram of another angle of structure shown in Fig. 2；
Fig. 4 is the half sectional view of structure shown in Fig. 2；
Fig. 5 is the schematic diagram of another angle of structure shown in Fig. 4；
Fig. 6 is the structural schematic diagram of the sub- shell of filter shown in Fig. 2；
Fig. 7 is the structural schematic diagram of another angle of sub- shell shown in Fig. 6；
Fig. 8 is the structural schematic diagram of another angle of sub- shell shown in Fig. 6；
Fig. 9 is the half sectional view of sub- shell shown in Fig. 6；
Figure 10 is the schematic diagram of another angle of structure shown in Fig. 9；
Figure 11 is the ferritic structural schematic diagram of filter shown in Fig. 2；
Figure 12 is the schematic diagram of another ferritic angle shown in Figure 11；
Figure 13 is the schematic diagram of another ferritic angle shown in Figure 11；
Figure 14 is the structural schematic diagram according to the conductive nut of the filter of the utility model embodiment；
Figure 15 is the semi-cutaway according to the filter of the utility model another embodiment；
Figure 16 is the schematic diagram of another angle of structure shown in Figure 15；
Figure 17 is the schematic diagram of the sub- shell of filter shown in Figure 15；
Figure 18 is the schematic diagram of another angle of sub- shell shown in Figure 17；
Figure 19 is the ferritic structural schematic diagram of filter shown in Figure 15；
Figure 20 is the structural schematic diagram of another ferritic angle shown in Figure 19；
Figure 21 is the EMI of the insertion loss and separate type in the prior art according to the filter of the utility model embodiment
The comparison diagram of the insertion loss of filter.
Appended drawing reference:
Filter 100；
Magnet ring 1；Ferrite 11；Passing channel 111；
Shell 2；Sub- shell 21；First conductive segment 211；Second conductive segment 212；Non-conductive section 213；
Axially position part 101；Circumferentially positioned part 102；Accommodation groove 103；Fitting projection 104；Mating groove 105；Conductive spiral shell
Mother 106；Conductive stud disk 107；First conducting ring 2111；Second conducting ring 2121；Non-conducting loops 2131；
Conductive mounting matrix 200；
Cable 300；Wire stylet 301；Wire insulation 302.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model
Limitation.
The application proposes the understanding of following problems based on applicant:
The life of modern society and the electromagnetic environment of industrial site become increasingly complex, and live electrical equipment has not
Same working frequency range, to prevent electromagnetic interference from entering electrical system by feed cable, usually in various electrical equipments extensively
Use the filter that can filter out noise.
Filter in the related technology is when in use, it usually needs cable is truncated, then filter accesses cable,
This mounting means can not only damage cable, and install operation and be inconvenient.
To solve the above-mentioned problems, a kind of electromagnetic interface filter of separate type is suggested at present, referring to shown in attached drawing 1, this point
Electromagnetic interface filter from formula includes: two separation magnets 10 (ferrite), and two separation magnets 10 constitute magnet ring, outside two separation magnets 10
Side is provided with openable and closable rubber shell 20, and the both ends of rubber shell 20 are provided with oval opening 30, in use, the electromagnetic interface filter is fastened
In on cable.
Although the filter of this type do not have to by cable truncation and it is easy for installation, there is distributions between its conducting wire
Capacitor, capacitive reactance is smaller when high frequency, and High-frequency Interference will be ineffective by direct-coupling, magnet ring；Furthermore when High-frequency Interference energy is higher
When, magnetic hystersis loss and eddy-current loss are excessive in magnet ring, will lead to magnet ring temperature and rise rapidly, because of the curie point of Ferrite Material
(magnetic material loses ferromagnetic temperature) is lower, once temperature is excessively high up to or over curie point, Ferrite Material meeting
It loses magnetism immediately, magnet ring also can be ineffective.The electromagnetic interface filter of i.e. this kind separate type, although do not have to by cable truncation and
It is easy for installation, but its interference free performance is poor.
For this purpose, present applicant proposes a kind of filter 100, the filter of the application will not only destroy cable during installation
Line 300, and at the same time the consumption (resistance characteristic of 11 magnet ring 1 of ferrite) to interference noise, reflection (11 magnetic of ferrite can be realized
The inductance characteristic of ring 1), release (two distribution capacity), good in anti-interference performance.
Below with reference to Fig. 2-Figure 21 description according to the filter 100 of the utility model embodiment.
With reference to shown in Fig. 2-Figure 20, the filter 100 according to the utility model embodiment includes: magnet ring 1 and shell 2.
Magnet ring 1 includes multiple ferrites 11, and each ferrite 11 is non-close in the circumferential, and multiple ferrites 11 can
Splicing (head and the tail successively splice in the circumferential) forms circumferential closed cyclic structure, and it is logical to form line between multiple ferrites 11
Road 111.
Shell 2 includes multiple sub- shells 21, and every sub- shell 21 is non-close in the circumferential, and multiple sub- shells 21 can
Splicing (head and the tail successively splice in the circumferential) forms circumferential closed cyclic structure, and 2 housing of shell is in the outside of magnet ring 1, often
A sub- shell 21 including the first conductive segment 211, the second conductive segment 212 and is connected to the first conductive segment 211 and the second conductive segment
Non-conductive section 213 between 212, multiple first conductive segments 211 are spliced to form the first conducting ring 2111, multiple second conductive segments
212 are spliced to form the second conducting ring 2121, and multiple non-conductive sections 213 are spliced to form non-conducting loops 2131.
It should be noted that the meaning of " plurality " is two or more in the description of the present invention, unless separately
There is clearly specific restriction.I.e. magnet ring 1 includes two (as shown in Fig. 2-Figure 20) or more than two ferrites 11, shell 2
Including two (as shown in Fig. 2-Figure 20) or more than two sub- shells 21.
In practical applications, it is not necessary that cable 300 to be truncated, by around the assembled ferrite 11 of cable 300 and sub- shell
Body 21, so that cable 300 is located in passing channel 111, to realize the installation of filter 100.The filtering of the utility model
Device 100 is a kind of non-intervention type filter 100, does not destroy power line signal line during installation.
It should be noted that the erection method of ferrite 11 and sub- shell 21 can be arbitrarily selected, such as:
When installing filter 100, can be first about cable 300 by multiple ferrites 11 in the circumferential head and the tail successively
Assembly is to form cricoid magnet ring 1, and cable 300 is located in passing channel 111 after assembly；It then will be more in the outside of magnet ring 1
Successively assembly is to form cricoid shell 2 of the housing on 1 periphery wall of magnet ring for head and the tail in the circumferential for a sub- shell 21, when assembled
Wait, the connection type between two neighboring ferrite 11 can be arbitrarily selected, such as can by way of clamping or grafting phase
Even, or can also be connected by connector (such as bolt etc.), the connection type between two neighboring sub- shell 21 equally may be used
With arbitrarily selected, such as can be connected by way of clamping or grafting, or connector (such as bolt etc.) can also be passed through
It is connected；
Alternatively, first multiple ferrites 11 are connected to correspondingly on multiple sub- shells 21, i.e. 11 He of ferrite
One sub- shell 21 correspondence is connected to form an assembly unit, then around cable 300 by multiple assembly units head and the tail according to
Secondary assembly, the connection type between two neighboring assembly unit can be arbitrarily selected, such as can pass through the side of clamping or grafting
Formula is connected, or can also be connected by connector (such as conductive nut 106 described in Examples below).
First conducting ring 2111 and the second conducting ring 2121 are spaced apart by non-conducting loops 2131, the first conducting ring 2111 and
Two conducting rings 2121 are all connected with the earth, when filter 100 is installed on cable 300, such as Fig. 2-Fig. 5 and Figure 15-Figure 16
Shown in, cable 300 and the first conducting ring 2111 constitute a distribution capacity, 2121 structure of cable 300 and the second conducting ring
At a distribution capacity, magnet ring 1 constitutes inductor, so that filter 100 forms pi type filter 100.That is cable 300
Two distribution capacity are formed between shell 2, two distribution capacity constitute pi type filter 100 with magnet ring 1 together.So that
Consumption (resistance characteristic of 11 magnet ring 1 of ferrite), reflection to interference noise may be implemented in the filter 100 of the utility model
(inductance characteristic of 11 magnet ring 1 of ferrite) releases (two distribution capacity).The filter 100 of the utility model is in addition to that can incite somebody to action
Interference noise is converted to heat and discharges outside on magnet ring 1, and the filtering of π type can also be made up of together distribution capacity and magnet ring 1
Interference is released to shell 2, is finally released to big ground by device 100.
According to the filter 100 of the utility model embodiment, cable 300 will not be not only destroyed during installation, and same
When can realize consumption (resistance characteristic of 11 magnet ring 1 of ferrite) to interference noise, reflection, and (inductance of 11 magnet ring 1 of ferrite is special
Property), release (two distribution capacity), good in anti-interference performance.
First conductive segment 211 and the second conductive segment 212 all have conductive characteristic, it is preferable that the first conductive segment 211 and second
Conductive segment 212 all has high conductivity.The material of first conductive segment 211 and the second conductive segment 212 can be carbon material, metal material
Expect (iron, gold, silver, cobalt, nickel, aluminium, molybdenum etc.) and its alloy, metal oxide containing precious metals, conducting polymer, is also possible to these materials
Mixing material can also be the mixing material of conductive material and non-conducting material.Wherein, the first conductive segment 211 and second is conductive
Section 212 can be made of identical material, can also be made from a variety of materials.
In addition, the first conductive segment 211 and the second conductive segment 212 can select the good conductive material of thermal conductivity to be made, by
This can go out the heat quick release that magnet ring 1 generates, preferably reduction temperature rise rate, to reduce iron to a certain extent
11 temperature of oxysome is more than the risk of curie point and loss of excitation.
Ferrite 11 can be Mn-Zn series ferrite 11, NiCuZn series ferrite 11, Mg-Zn series ferrite 11
Equal high magnetic conductivity ferrites 11.
In one embodiment of the utility model, as shown in Fig. 2-Fig. 4, the number of ferrite 11 and sub- shell 21 is equal
It is two, i.e., ferrite 11 is two, and sub- shell 21 is also two, thus facilitates assembly.
Preferably, as shown in Fig. 2-Fig. 4, two 11 structures of ferrite are identical, and the structure of two sub- shells 21 is identical, tool
Body, the shape of two ferrites 11 is identical, and two ferrites 11 is equal sized, and the shape of two sub- shells 21 is identical,
Two sub- shells 21 it is equal sized so that the symmetrical configuration of filter 100, beauty, and facilitate the manufacturing.
In an alternative embodiment of the utility model, ferrite 11 and sub- shell 21 are respectively formed arc-shaped, i.e. iron oxygen
Body 11 forms arc-shaped, and sub- shell 21 is also formed in arc-shaped, such as the specific example shown in Fig. 2-Figure 20,11 shape of ferrite
At semicircular arc-shaped, sub- shell 21 also formed it is semicircular arc-shaped so that 100 structure of filter is beautiful and facilitates production and assembly.
Certainly, the application is not limited to this, and the shape of ferrite 11 and sub- shell 21 can be arbitrarily selected, such as ferrite 11 and sub- shell
Body 21 can also be all formed as semiellipse arcuation.
In one embodiment of the utility model, multiple ferrites 11 are connected with multiple sub- one-to-one correspondence of shell 21, i.e.,
One ferrite 11 is correspondingly connected with a sub- shell 21 to form an assembly unit, then again by multiple assembly units in circumferential direction
Upper head and the tail successively splice.Such as shown in Fig. 4-Figure 10 and Figure 15-Figure 18, two ferrites 11 and two sub- shells 21 are one by one
Corresponding to be connected, to form two assembly units, latter two right assembly unit is bolted together.
Wherein, the connection type between ferrite 11 and sub- shell 21 can according to need arbitrarily selected, for example, optional
Ground, as shown in Fig. 2-Fig. 5 and Figure 15-Figure 16, the axial ends of sub- shell 21 is respectively equipped with axially position part 101, and two
Axially position part 101 is abutted with the axial ends face of ferrite 11 respectively, and ferrite 11 is positioned in two axially position parts 101
Between, the axially position of ferrite 11 is realized, to realize the connection between ferrite 11 and sub- shell 21.Axially position part
101 can be nonconductive resilient part, such as can be plastic part or rubber parts etc..
Optionally, as shown in Fig. 7-Figure 10, the circumferential both ends of sub- shell 21 are respectively equipped with circumferentially positioned part 102, and two
Circumferentially positioned part 102 is abutted with the circumferential both ends of the surface of ferrite 11 respectively, and ferrite 11 is positioned in two circumferentially positioned parts 102
Between, the circumferentially positioned of ferrite 11 is realized, to realize the connection between ferrite 11 and sub- shell 21.Circumferentially positioned part
102 can be nonconductive resilient part, such as can be plastic part or rubber parts etc..
Further, as shown in Fig. 7-Figure 12, the circumferential end faces of sub- shell 21 are concordant with the circumferential end faces of ferrite 11,
Circumferentially positioned part 102 is extended by the circumferential end faces of sub- shell 21 towards ferrite 11, is formed and is held in the circumferential end faces of ferrite 11
Slot 103 is set, circumferentially positioned part 102 is placed in accommodation groove 103, so that the circumferential end faces of circumferentially positioned part 102 and ferrite 11
Concordantly.When ferrite 11 is positioned between two circumferentially positioned parts 102, circumferentially positioned part 102 is placed in accommodation groove 103
It is interior, it is possible thereby to which circumferentially positioned part 102 is avoided to protrude from the circumferential end faces of ferrite 11, spelled in this way in two assembly units
When dress, two assembly units can be docked preferably, and the circumferential end faces of two ferrites 11 can sufficiently fit together, and two
The circumferential end faces of sub- shell 21 can sufficiently fit together, and will not form gap in stitching portion, thereby guarantee that filter 100
Interference free performance.
Optionally, one of them of ferrite 11 and sub- shell 21 are equipped with fitting projection 104, ferrite 11 and sub- shell
Another in 21 is equipped with mating groove 105.It here include following two specific example, in one example, such as Fig. 4-figure
Shown in 13, ferrite 11 is equipped with fitting projection 104, and sub- shell 21 is equipped with mating groove 105；In another example,
Ferrite 11 is equipped with mating groove 105, and sub- shell 21 is equipped with fitting projection 104.Pass through fitting projection 104 and mating groove
Cooperation between 105, so that the connection between ferrite 11 and sub- shell 21 is more reliable and more stable.As shown in Fig. 4-Figure 13,
Fitting projection 104 and mating groove 105 can be along the circumferentially extendings of filter 100；Certainly, fitting projection 104 and mating groove
105 can also be along axially extending (not shown go out) of filter 100.
Further, fitting projection 104 or mating groove 105 are set on non-conductive section 213.Such as institute in Fig. 7-Figure 10
Show, mating groove 105 is formed on non-conductive section 213.By the way that mating groove 105 to be formed on non-conductive section 213, so that filter
100 structure of wave device more piles, and facilitates production and processing.Certainly, the application is not limited to this, fitting projection 104 or mating groove
105 can also be formed on the first conductive segment 211 or the second conductive segment 212.
Wherein, when the connection positioning method between cobalt ferrite 11 and sub- shell 21, however it is not limited to above-mentioned axially position
Part 101, circumferentially positioned part 102 and fitting projection 104 and mating groove 105, can be between ferrite 11 and sub- shell 21
It is connected by connectors such as bonding or bolts.
Connection type between two neighboring assembly unit also can according to need arbitrarily selected, such as the first conducting ring
The first conductive fastener is cased with outside on 2111 to fasten multiple first conductive segments 211, is cased with second outside on the second conducting ring 2121
For conductive fastener to fasten multiple second conductive segments 212, the connection being achieved between two neighboring assembly unit is easy to connect
And connection reliability is high.And the first conductive fastener and the second conductive fastener are conduct piece, it is possible thereby to increase multiple
Contact area between first conductive segment 211, and increase the contact area between multiple second conductive segments 212, thus promoted
The interference free performance of filter 100.
First conductive fastener and the second conductive fastener all have conductive characteristic, it is preferable that the first conductive fastener and
Second conductive fastener all has high conductivity.The material of first conductive fastener and the second conductive fastener can be carbon materials
Material, metal material (iron, gold, silver, cobalt, nickel, aluminium, molybdenum etc.) and its alloy, metal oxide containing precious metals, conducting polymer, are also possible to
The mixing material of these materials can also be the mixing material of conductive material and non-conducting material.Wherein, the first conductive fastener
It can be made, can also be made from a variety of materials of identical material with the second conductive fastener.
Optionally, as shown in Figure 14, the first conductive fastener and the second conductive fastener are conductive nut 106, the
The screw thread cooperated with conductive nut 106 is equipped on the periphery wall of one conducting ring 2111 and the second conducting ring 2121, first is conductive
Fastener is screwed on the periphery wall of the first conducting ring 2111, and the second conductive fastener is screwed in the periphery of the second conducting ring 2121
On wall.By way of being threadedly engaged, so that the first conductive fastener firmly cooperates on the first conducting ring 2111, second is led
Electric fastener firmly cooperates on the second conducting ring 2121.
Further, as shown in Fig. 2-Figure 10, the periphery wall of the first conducting ring 2111 is equipped with cricoid conductive stud disk
107, when filter 100 is arranged on conductive mounting matrix 200 (i.e. greatly), conductive stud disk 107 is connected to conductive mounting base
The side of body 200, the second conductive fastener are connected to the other side of conductive mounting matrix 200, so that filter 100 is mounted on
On conductive mounting matrix 200.In addition, being abutted by conductive stud disk 107 with conductive mounting matrix 200, to realize that first is conductive
Ring 2111 is connect with the earth, and the cooperation of the second conductive fastener is on the second conducting ring 2121 and the second conductive fastener and conduction are pacified
It fills matrix 200 and abuts the axial length of non-conducting loops 2131 (axial length of the second conductive fastener be greater than), from there through the
Two conductive fasteners realize that the second conducting ring 2121 is connect with the earth.Conductive mounting matrix 200 can be the conduction of electrical box
Shell (such as metal shell etc.).
Conductive mounting matrix 200 is equipped with mounting hole, and the aperture of mounting hole is slightly larger than the spiral shell on the periphery wall of filter 100
Thus line diameter facilitates and filter 100 is threaded through in mounting hole.
As shown in Fig. 4-Fig. 5 and Figure 15-Figure 16, cable 300 includes wire stylet 301 and housing in wire stylet 301
On wire insulation 302, when filter 100 is mounted on cable 300, the overall diameter of wire stylet 301 is 2r, and first leads
The interior diameter of electric ring 2111 and the second conducting ring 2121 is 2R.According to the calculation formula of coaxial cylindrical capacitor:
Can estimation filter 100 two distribution capacity capacitance, wherein C is capacitor, and L is cylindrical condenser length,
R is cylindrical condenser column jacket radius surface, and r is cylindrical condenser inner prop radius surface (i.e. the outer radius of wire stylet 301), and ε is equivalent
Dielectric constant.
When estimating the capacitance of distribution capacity of cable 300 and the first conducting ring 2111 composition, L is the first conducting ring
2111 axial length, R are the inside radius of the first conducting ring 2111；It is constituted in estimation cable 300 and the second conducting ring 2121
Distribution capacity capacitance when, L be the second conducting ring 2121 axial length, R be the second conducting ring 2121 inside radius.
By adjusting 11 material category of ferrite, the axial length of the first conducting ring 2111, the second conducting ring 2121, conducting wire
301 outer diameter of core, the internal diameter of the first conducting ring 2111, the second conducting ring 2121,301 radial outer edge of wire stylet and the first conducting ring
2111, the distance of the inner diameter edge of the second conducting ring 2121 adjusts the capacitance of distribution capacity.Estimate its equivalent capacity numerical value
In 1pF~1nF.
Two distribution capacity and magnet ring 1 of filter 100 constitute pi type filter 100, since magnet ring 1 has inductance and resistance
Characteristic, pi type filter 100 are C-L-C type and C-R-C type and deposit.Equivalent capacitance value with two distribution capacity is respectively
1nF and 0.1nF, the characteristic parameter of magnet ring 1 are respectively 25MHz, 100MHz, 1GHz, the equivalent resistance of magnet ring 1 be respectively 130 Ω,
250 Ω, 50 Ω, for the equivalent inductance of magnet ring 1 is respectively 3.2nH, 0.06nH, 0nH, illustrate the application by two distributions electricity
Hold the 100 bring advantage of pi type filter constituted with magnet ring 1.Simulation result is as shown in Figure 21, it can be seen that the application
The pi type filter 100 being made of two distribution capacity and magnet ring 1 compared with the existing technology in the EMI that constitutes of independent magnet ring 1
Filter 100 can significantly improve its insertion loss.
In the description of the present invention, it should be understood that term " center ", "inner", "outside", " axial direction ", " circumferential direction "
The orientation or positional relationship of equal instructions is to be based on the orientation or positional relationship shown in the drawings, and being merely for convenience of description, this is practical new
Type and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation
Construction and operation, therefore should not be understood as limiting the present invention.
In the description of the present invention, " the first XXX ", " the 2nd XXX " feature can explicitly or implicitly include
One or more corresponding feature.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements or the interaction relationship of two elements.For those of ordinary skill in the art and
Speech, can understand the concrete meaning of above-mentioned term in the present invention as the case may be.
In description in the present invention unless specifically defined or limited otherwise, fisrt feature second feature it
"upper" or "lower" may include that the first and second features directly contact, may include the first and second features be not directly to connect yet
It touches but by the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " on
Face " includes fisrt feature right above second feature and oblique upper, or to be merely representative of first feature horizontal height special higher than second
Sign.Fisrt feature include under the second feature " below ", " below " and " below " fisrt feature immediately below second feature and obliquely downward
Side, or first feature horizontal height is merely representative of less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are contained at least one embodiment or example of the utility model.In the present specification, to above-mentioned art
The schematic representation of language may not refer to the same embodiment or example.Moreover, description specific features, structure, material or
Person's feature can be combined in any suitable manner in any one or more of the embodiments or examples.
While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that:
These embodiments can be carried out with a variety of variations, modification, replacement in the case where not departing from the principles of the present invention and objective
And modification, the scope of the utility model are defined by the claims and their equivalents.
Claims (12)
1. a kind of filter characterized by comprising
Magnet ring, the magnet ring include multiple ferrites, and each ferrite is non-close in the circumferential, multiple iron
The sliceable formation of oxysome is circumferential closed cyclic structure, forms passing channel between multiple ferrites；
Shell, the shell include multiple sub- shells, and each sub- shell is non-close in the circumferential, multiple sons
The circumferentially upper closed cyclic structure of the sliceable formation of shell, the shell housing is in the outside of the magnet ring, each sub- shell
Body includes the first conductive segment, the second conductive segment and be connected between first conductive segment and second conductive segment non-lead
Electric section, multiple first conductive segments are spliced to form the first conducting ring, and multiple second conductive segments are spliced to form the second conduction
Ring, multiple described non-conductive sections are spliced to form non-conducting loops.
2. filter according to claim 1, which is characterized in that the ferrite and the sub- shell are respectively formed circular arc
Shape.
3. filter according to claim 1, which is characterized in that multiple ferrites and multiple sub- shells are one by one
It is corresponding to be connected.
4. filter according to claim 3, which is characterized in that the axial ends of the sub- shell is respectively equipped with axial fixed
Position part, two axially position parts are abutted with the ferritic axial ends face respectively.
5. filter according to claim 3, which is characterized in that the circumferential both ends of the sub- shell are respectively equipped with circumferential fixed
Position part, two circumferentially positioned parts are abutted with the ferritic circumferential both ends of the surface respectively.
6. filter according to claim 5, which is characterized in that the circumferential end faces of the sub- shell with it is described ferritic
Circumferential end faces are concordant, and the circumferentially positioned part is extended by the circumferential end faces of the sub- shell towards the ferrite, the iron oxygen
Accommodation groove is formed in the circumferential end faces of body, the circumferentially positioned part is placed in the accommodation groove, so that the circumferentially positioned part
It is concordant with the ferritic circumferential end faces.
7. filter according to claim 3, which is characterized in that one of them of the ferrite and sub- shell are equipped with
Fitting projection, another in the ferrite and sub- shell are equipped with mating groove.
8. filter according to claim 7, which is characterized in that the fitting projection or the mating groove are set on described
On non-conductive section.
9. filter according to claim 1, which is characterized in that outer on first conducting ring to be cased with the first conductive fastening
Part is to fasten multiple first conductive segments, and outer on second conducting ring to be cased with the second conductive fastener multiple described to fasten
Second conductive segment.
10. filter according to claim 9, which is characterized in that first conductive fastener and second conduction
Fastener is conductive nut, is equipped on the periphery wall of first conducting ring and second conducting ring and the conductive spiral shell
The screw thread of mother's cooperation.
11. filter according to claim 10, which is characterized in that the periphery wall of first conducting ring is equipped with ring-type
Conductive stud disk, when the filter is arranged on conductive mounting matrix, the conductive stud disk is connected to the conductive mounting
The side of matrix, second conductive fastener are connected to the other side of the conductive mounting matrix.
12. filter described in any one of -11 according to claim 1, which is characterized in that the ferrite and the sub- shell
Number be two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822278823.7U CN209199712U (en) | 2018-12-29 | 2018-12-29 | Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822278823.7U CN209199712U (en) | 2018-12-29 | 2018-12-29 | Filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209199712U true CN209199712U (en) | 2019-08-02 |
Family
ID=67431024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822278823.7U Withdrawn - After Issue CN209199712U (en) | 2018-12-29 | 2018-12-29 | Filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209199712U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509607A (en) * | 2018-12-29 | 2019-03-22 | 合肥美亚光电技术股份有限公司 | Filter |
-
2018
- 2018-12-29 CN CN201822278823.7U patent/CN209199712U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509607A (en) * | 2018-12-29 | 2019-03-22 | 合肥美亚光电技术股份有限公司 | Filter |
| CN109509607B (en) * | 2018-12-29 | 2023-11-17 | 合肥美亚光电技术股份有限公司 | filter |
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