CN208706363U - A kind of common mode inductance - Google Patents
A kind of common mode inductance Download PDFInfo
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- CN208706363U CN208706363U CN201821390728.XU CN201821390728U CN208706363U CN 208706363 U CN208706363 U CN 208706363U CN 201821390728 U CN201821390728 U CN 201821390728U CN 208706363 U CN208706363 U CN 208706363U
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Abstract
The utility model discloses a kind of common mode inductances, including two groups of wire windings and magnetizer, it is characterized in that, the magnetizer is set as cyclic annular, and magnetizer inner wall is fixedly connected with partition, magnetizer inner ring is separated into identical two parts of size by the partition, two groups of wire windings of the magnetizer surface wrap, two groups of wire windings do not contact, and two groups of wire windings are respectively arranged at the left and right sides of partition, the number of turns and phase of two groups of wire windings are all identical (coiling is reversed), this common mode inductance is used to filter the electromagnetic interference signal of common mode, when being passed through normal current in circuit, electric current generates in the wire winding of same-phase coiling reversed magnetic field and is cancelled out each other；When there is common mode current to flow through wire winding, due to the same tropism of common mode current, the induction reactance that generate magnetic field in the same direction in wire winding and increase wire winding is understood, wire winding is set to show as high impedance, stronger damping is generated, with this attenuation common-mode electric current, achievees the purpose that filtering.
Description
Technical field
The utility model relates to inductor field, specifically a kind of common mode inductance.
Background technique
Common mode inductance is also common mode choke, is usually used in filtering the electromagnetic interference signal of common mode in the Switching Power Supply of computer.
In board design, common mode inductance is also to play EMI filtering, the electromagnetic wave outside spoke for inhibiting HW High Way to generate
Penetrate transmitting.
Common mode inductance applies in various electric appliances, and still, existing common mode inductance still remains defect, winds on magnet ring
When conducting wire, because magnet ring aperture is small, conducting wire is easy to contact, and will increase the parasitic capacitance of coil in this way, coil is to instantaneous
The ability to bear of overvoltage reduces, and therefore, those skilled in the art provide a kind of common mode inductance, to solve above-mentioned background technique
The problem of middle proposition.
Summary of the invention
The purpose of this utility model is to provide a kind of common mode inductances, to solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides the following technical solutions:
A kind of common mode inductance, including two groups of wire windings and magnetizer, the magnetizer are set as cyclic annular, and in magnetizer
Wall is fixedly connected with partition, and magnetizer inner ring is separated into identical two parts of size by the partition, and the magnetizer surface twines
Around two groups of wire windings, two groups of wire windings are not contacted, and two groups of wire windings are respectively arranged at the left and right sides of partition, and two groups
The number of turns and phase of wire winding are all identical (coiling is reversed)；
The wire winding includes insulating layer, sponge bed course and conducting wire, and sponge bed course is wrapped up in the conducting wire outer surface, described
Wrap up insulating layer in sponge bed course outer surface.
As a further solution of the present invention: the material of the insulating layer is formed by vinyl polymerization.
The magnetizer includes winding ring, groove, groove a and limited block as a further solution of the present invention,
Several grooves are arranged in the winding ring outer wall, and several groove a are arranged in the winding ring inner wall, and the winding ring inner wall is solid symmetrically to be set
Two limited blocks are set, offer limiting slot on the limited block.
The side wall dimensions of the size of the limiting slot and partition upper and lower ends as a further solution of the present invention,
It is identical, and partition connects winding ring by limited block.
The groove and groove a are to wind the circle of ring as center center as a further solution of the present invention,
It is symmetrical arranged, the groove is identical with groove a size, and the number of groove is greater than groove a number.
The groove and groove a are set as semicircle as a further solution of the present invention, and groove and groove
The diameter of a is identical as insulating layer diameter.
Compared with prior art, the utility model has the beneficial effects that
1, this common mode inductance is used to filter the electromagnetic interference signal of common mode, and when being passed through normal current in circuit, electric current exists
Reversed magnetic field is generated in the wire winding of same-phase coiling and is cancelled out each other；When there is common mode current to flow through wire winding, by
In the same tropism of common mode current, magnetic field in the same direction can be generated in wire winding and increase the induction reactance of wire winding, make conducting wire around
Group shows as high impedance, generates stronger damping, with this attenuation common-mode electric current, achievees the purpose that filtering.
2, one layer of sponge bed course is arranged in the wire winding between insulating layer and conducting wire, can make adjacent lead in this way
Spacing becomes larger between line, prevents coil from puncture short, and, the groove and groove a more abundant to the protection of conducting wire occurs
Wire winding is limited so that it is convenient to which coil single layer coiling, reduces the parasitic capacitance of coil, this common mode inductance structure is closed
Reason, wire winding facilitate coiling, and suitable society is widely used.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of common mode inductance.
Fig. 2 is a kind of structural schematic diagram of magnetizer in common mode inductance.
Fig. 3 is a kind of structural schematic diagram of wire winding in common mode inductance.
In figure: 1- wire winding, 2- magnetizer, 3- partition, 101- winding ring, 102- groove, 103- groove a, 104- limit
Position block, 105- limiting slot, 201- insulating layer, 202- sponge bed course, 203- conducting wire.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Please refer to Fig. 1~3, in the utility model embodiment, a kind of common mode inductance, including two groups of wire windings 1 and magnetic conduction
Body 2, the magnetizer 2 are set as cyclic annular, and 2 inner wall of magnetizer is fixedly connected with partition 3, and the partition 3 divides 2 inner ring of magnetizer
It is divided into identical two parts of size, 2 surface wrap of magnetizer, two groups of wire windings 1, two groups of wire windings 1 do not contact,
And two groups of wire windings 1 are respectively arranged at the left and right sides of partition 3, the number of turns and all identical (coiling of phase of two groups of wire windings 1
Reversely)；
The wire winding 1 includes insulating layer 201, sponge bed course 202 and conducting wire 203,203 outer surface of the conducting wire package
Insulating layer 201 is wrapped up in sponge bed course 202,202 outer surface of sponge bed course.
The material of the insulating layer 201 is formed by vinyl polymerization.
The magnetizer 2 includes winding ring 101, groove 102, groove a103 and limited block 104, outside the winding ring 101
Several grooves 102 are arranged in wall, and several groove a103 are arranged in 101 inner wall of winding ring, and 101 inner wall of winding ring is solid symmetrically to be set
Two limited blocks 104 are set, offer limiting slot 105 on the limited block 104.
The size of the limiting slot 105 is identical as the side wall dimensions of 3 upper and lower ends of partition, and partition 3 passes through limited block 104
Connection winding ring 101.
The groove 102 and groove a103 are to wind the circle of ring 101 as center center symmetric setting, the groove 102
It is identical with groove a103 size, and the number of groove 102 is greater than groove a103 number.
The groove 102 and groove a103 are set as semicircle, and the diameter and insulating layer of groove 102 and groove a103
201 diameters are identical.
The working principle of the utility model is:
This common mode inductance is used to filter the electromagnetic interference signal of common mode, and when being passed through normal current in circuit, electric current is same
It generates reversed magnetic field in the wire winding 1 of phase coiling and cancels out each other；When there is common mode current to flow through wire winding 1, by
In the same tropism of common mode current, magnetic field in the same direction can be generated in wire winding 1 and increase the induction reactance of wire winding, make conducting wire around
Group 1 shows as high impedance, generates stronger damping, with this attenuation common-mode electric current, achievees the purpose that filtering, the conducting wire around
One layer of sponge bed course 202 is arranged in group 1 between insulating layer 201 and conducting wire 203, can make between adjacent conducting wire 203 in this way
Spacing becomes larger, and prevents coil from puncture short, and, the groove 102 and groove more abundant to the protection of conducting wire 203 occurs
A103 is limited to wire winding 1 so that it is convenient to which coil single layer coiling, reduces the parasitic capacitance of coil, this common mode inductance knot
Structure is reasonable, and wire winding facilitates coiling, and suitable society is widely used.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (6)
1. a kind of common mode inductance, including two groups of wire windings and magnetizer, which is characterized in that the magnetizer is set as cyclic annular,
And magnetizer inner wall is fixedly connected with partition, magnetizer inner ring is separated into identical two parts of size by the partition, described to lead
Magnet surface winds two groups of wire windings, and two groups of wire windings do not contact, and two groups of wire windings are respectively arranged at a left side for partition
Right two sides, the number of turns and phase of two groups of wire windings are all identical；
The wire winding includes insulating layer, sponge bed course and conducting wire, and sponge bed course, the sponge are wrapped up in the conducting wire outer surface
Wrap up insulating layer in bed course outer surface.
2. a kind of common mode inductance according to claim 1, which is characterized in that the material of the insulating layer by vinyl polymerization and
At.
3. a kind of common mode inductance according to claim 1, which is characterized in that the magnetizer includes winding ring, groove, recessed
Several grooves are arranged in slot a and limited block, the winding ring outer wall, and several groove a, the winding ring is arranged in the winding ring inner wall
Inner wall is symmetrical arranged two limited blocks admittedly, offers limiting slot on the limited block.
4. a kind of common mode inductance according to claim 3, which is characterized in that two above and below the size and partition of the limiting slot
The side wall dimensions at end are identical, and partition connects winding ring by limited block.
5. a kind of common mode inductance according to claim 3, which is characterized in that the groove and groove a are to wind the circle of ring
Shape is center center symmetric setting, and the groove is identical with groove a size, and the number of groove is greater than groove a number.
6. a kind of common mode inductance according to claim 3, which is characterized in that the groove and groove a are set as semicircle,
And the diameter of groove and groove a are identical as insulating layer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821390728.XU CN208706363U (en) | 2018-08-28 | 2018-08-28 | A kind of common mode inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821390728.XU CN208706363U (en) | 2018-08-28 | 2018-08-28 | A kind of common mode inductance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208706363U true CN208706363U (en) | 2019-04-05 |
Family
ID=65945250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821390728.XU Active CN208706363U (en) | 2018-08-28 | 2018-08-28 | A kind of common mode inductance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208706363U (en) |
-
2018
- 2018-08-28 CN CN201821390728.XU patent/CN208706363U/en active Active
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