CN210403487U - Common mode inductor and power supply integrating differential mode - Google Patents
Common mode inductor and power supply integrating differential mode Download PDFInfo
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- CN210403487U CN210403487U CN201921256102.4U CN201921256102U CN210403487U CN 210403487 U CN210403487 U CN 210403487U CN 201921256102 U CN201921256102 U CN 201921256102U CN 210403487 U CN210403487 U CN 210403487U
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Abstract
The utility model relates to an integrated differential mode common mode inductor and power supply, which comprises an integrally formed outer frame, a first coil and a second coil, wherein the outer frame comprises a first magnetic column and a second magnetic column which are arranged in parallel and respectively wound by the first coil and the second coil; a third magnetic column and a fourth magnetic column which are connected with the first magnetic column and the second magnetic column; the first magnetic column, the second magnetic column, the third magnetic column and the fourth magnetic column are of an integrated structure made of the same magnetic conductive material; the outer frame also comprises a magnetic bridge which is arranged between the first magnetic column and the second magnetic column, is parallel to the first magnetic column and the second magnetic column and has equal distance with the first magnetic column and the second magnetic column; the two ends of the magnetic bridge are respectively connected with the third magnetic column and the fourth magnetic column, the gap is formed in the middle of the magnetic bridge, the cost of components is reduced in circuit design, space is saved, the consistency and reliability of products are improved, the coil can be wound by a machine for automatic production, and the production efficiency is improved.
Description
Technical Field
The utility model relates to the field of electronic technology, especially, relate to a common mode inductor and power of integrated differential mode.
Background
The existing power filter products and other filter circuits built in the power input end all need an EMI filter circuit composed of common mode filter inductors, differential mode filter inductors, X capacitors, Y capacitors and other elements. The common mode filter inductors are divided into the following types:
(1) the common mode filter inductor is formed by a circular high-permeability magnetic core and two groups of symmetrical windings; when the inductor is produced, each turn needs to penetrate through an inner hole of the magnetic ring and be tensioned, the production consistency is poor, the risk of friction and damage to the insulating layer of the lead is caused, and the reliability of the product is influenced.
(2) The common-mode filter inductor is formed by matching two E-shaped or U-shaped mirror surface high-permeability magnetic cores with frameworks with corresponding installation sizes and winding two groups of symmetrical coils on the frameworks; this inductance needs two "E" types or "U" type magnetic cores to mate the installation to magnetic core equipment composition face needs highly level and smooth, and multilayer strip brings great winding interturn parasitic capacitance problem, can produce the route to high frequency signal, is used for filtering high frequency signal with the wave filter design and disturbs mutually with the original purpose, and because the magnetic core frame is "EE" or "EI" integrated configuration, magnetic core interface unevenness or have impurity to press from both sides during production and can produce very big influence to product uniformity and reliability.
The differential mode filter inductors are divided into the following types:
(1) the differential mode filter inductor is formed by a circular anti-saturation material magnetic core (such as an iron powder core, an iron silicon aluminum powder core and the like) and a single winding.
(2) The differential mode filter inductor is formed by a cylindrical or I-shaped anti-saturation material magnetic core and a single winding.
The common mode filter inductor and the differential mode filter inductor have poor production consistency and high manufacturing cost, and along with the development, the power filter product requires that internal devices are integrated or simplified as much as possible.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a common mode inductor and power of integrated differential mode of modified.
The utility model provides a technical scheme that its technical problem adopted is: constructing an integrated differential mode common mode inductor, which comprises an integrally formed outer frame, a first coil and a second coil, wherein the outer frame comprises a first magnetic column and a second magnetic column which are arranged in parallel and respectively used for winding the first coil and the second coil;
a third magnetic column and a fourth magnetic column which are connected with the first magnetic column and the second magnetic column;
the first magnetic column, the second magnetic column, the third magnetic column and the fourth magnetic column are of an integrated structure made of the same magnetic conductive material;
the outer frame also comprises
The magnetic bridge is arranged between the first magnetic column and the second magnetic column, is parallel to the first magnetic column and the second magnetic column and has the same distance with the first magnetic column and the second magnetic column;
the two ends of the magnetic bridge are respectively connected with the third magnetic column and the fourth magnetic column, and a gap is arranged in the middle of the magnetic bridge to form an air gap.
Preferably, the first coil and the second coil are made of the same material and have the same number of winding turns.
Preferably, the first coil and the second coil are made of one of an enameled copper wire, an enameled aluminum wire, a flat copper wire or a flat aluminum wire.
Preferably, the third magnetic pillar and the fourth magnetic pillar are parallel to each other and are not wound with a coil.
Preferably, the first magnetic column, the second magnetic column, the third magnetic column and the fourth magnetic column are of one of a rectangular flat plate structure, a cylindrical flat plate structure or an elliptical flat plate structure.
Preferably, the magnetic bridge and the outer frame are of an integrated structure.
Preferably, the material of the magnetic bridge is high-permeability soft magnetic ferrite with mu being more than or equal to 10000.
Preferably, a positioning groove for the magnetic bridge to be clamped in is formed in one side, facing the inside of the outer frame, of the third magnetic column and one side, facing the inside of the outer frame, of the fourth magnetic column;
the magnetic bridge comprises limiting plates which are clamped into the positioning grooves and a magnetic bridge main body which is connected between the two limiting plates.
Preferably, the surfaces of the outer frame and the magnetic bridge are covered with an insulating layer.
A power supply comprises the differential mode integrated common-mode inductor and a framework for mounting and fixing the differential mode integrated common-mode inductor.
Implement the utility model discloses following beneficial effect has: the utility model discloses an integrated differential mode's common mode inductor and power can be at integrated differential mode filter inductance in common mode filter inductance, and greatly reduced components and parts cost saves space in circuit design, reduces whole manufacturing cost, improves product uniformity and reliability, and first magnetism post and the first coil of second magnetism post cooperation and second coil coiling can use machine automated production, and output is greatly promoted than traditional artifical threading coiling mode.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of the differential mode integrated common mode inductor of the present invention;
fig. 2 is a schematic diagram of a front structure of the differential mode integrated common mode inductor of the present invention;
fig. 3 is a top view of the differential mode integrated common mode inductor of the present invention;
fig. 4 is another schematic structure diagram of the differential mode integrated common mode inductor of the present invention;
FIG. 5 is a schematic diagram of a basic EMI filter circuit;
FIG. 6 is a circuit schematic diagram of the filtering effect of FIG. 5 simplified;
fig. 7 is a schematic diagram of common mode filtering of the differential mode integrated common mode inductor of the present invention;
fig. 8 is a schematic diagram of differential mode filtering of the differential mode integrated common mode inductor of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate that the device or element referred to must have a specific direction, and thus, should not be construed as limiting the present invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Referring to fig. 1-3 together, it is the utility model discloses an integrated differential mode's common mode inductor, it includes integrated into one piece's frame, and first coil 11 and second coil 21, the frame is including parallel arrangement each other side by side, and supply first coil 11 and second coil 21 coiling first magnet column 1 and second magnet column 2 on it respectively, connect third magnet column 3 and fourth magnet column 4 of first magnet column 1 and second magnet column 2, first magnet column 1, second magnet column 2, third magnet column 3 and fourth magnet column 4 are the integrated structure that the same magnetic conductive material made.
The outer frame also comprises a magnetic bridge 5 which is arranged between the first magnetic column 1 and the second magnetic column 2, is parallel to the first magnetic column and the second magnetic column 2, has equal distance, two ends of the magnetic bridge 5 are respectively connected with the third magnetic column 3 and the fourth magnetic column 4, and a gap is arranged in the middle position to form an air gap.
Because the outer frame is integrally formed, the problems that the butt joint is not smooth and impurities are easily mixed due to the splicing of the magnetic columns in the prior art are solved. The magnetic bridge is provided with a gap to resist saturation, so that the filtering effect is prevented from being lost due to saturation when a large amount of inductors surge.
In the present embodiment, the first coil 11 and the second coil 21 are made of the same material and have the same number of turns.
The first coil 11 and the second coil 21 are made of one of an enameled copper wire, an enameled aluminum wire, a flat copper wire or a flat aluminum wire. In this embodiment, a flat wire is used, and it can be understood that wires of different specifications can be used according to actual requirements.
Furthermore, the third magnetic pillar 3 and the fourth magnetic pillar 4 are parallel to each other and are not wound with a coil.
In this embodiment, the first magnetic pillar 1, the second magnetic pillar 2, the third magnetic pillar 3, and the fourth magnetic pillar 4 are one of a rectangular plate structure, a cylindrical plate structure, or an elliptical plate structure.
It is understood that the first magnetic pillar 1, the second magnetic pillar 2, the third magnetic pillar 3 and the fourth magnetic pillar 4 may have the same structure, and in some embodiments, the first magnetic pillar 1 and the second magnetic pillar 2 may have the same structure, and the third magnetic pillar 3 and the fourth magnetic pillar 4 may have the same structure. It will be appreciated that the shape and size may be selected to suit different power class application requirements and is not specifically limited herein.
Further, the magnetic bridge 5 and the outer frame are of an integrated structure. It can be understood that a corresponding mold can be developed, so that the magnetic bridge 5 and the outer frame are integrally molded, and the magnetic bridge 5 and the outer frame are made of different materials, in this embodiment, the material of the magnetic bridge 5 is a high-permeability soft magnetic ferrite with μ ≥ 10000, and of course, different permeability and material may also be used according to actual needs, which is not specifically limited herein.
Referring to fig. 4, in some embodiments, the third magnetic pillar 3 and the fourth magnetic pillar 4 are provided with a positioning slot for the magnetic bridge 5 to be clamped into on a side facing the inside of the outer frame 4, the magnetic bridge 5 includes a limiting plate 51 for being clamped into the positioning slot, and a magnetic bridge main body 52 connected between the two limiting plates 51, and the magnetic bridge main body 52 is also provided with a notch to form an air gap. In the actual production process, after the limiting plate 51 is assembled, it is fixed on the outer frame by glue. The size of this breach can set up according to actual demand.
Further, the surfaces of the outer frame and the magnetic bridge 5 are covered with insulating layers.
In the embodiment, a power supply is further disclosed, which includes the above-mentioned differential mode integrated common mode inductor, and a framework 100 for mounting and fixing the differential mode integrated common mode inductor, where the framework 100 may be designed in a vertical or horizontal manner to meet different design space requirements.
Referring to fig. 5, a basic EMI filter circuit schematic diagram is composed of CX1, CX2, CY1, CCY2, L1, L2, and L3, wherein L1 is implemented by a structural common mode filter inductor, and L2 and L3 are implemented by a differential mode inductor. Because the filter needs to filter out common mode interference and differential mode interference in the line, two inductors are necessary to achieve an ideal filtering effect.
Referring to fig. 6, a simplified circuit structure equivalent to the filtering effect of fig. 5 is obtained by simplifying L1, L2, and L3 in the filter of fig. 5 to only L1, where La and Lb are the differential mode inductances in the differential mode integrated common mode inductor of the present invention.
Referring to fig. 7, when a normal load current flows through the line, the current generates opposite magnetic fields in the two windings to cancel each other out, which has no influence on the normal load current, and when a common mode interference is injected into the line, due to the same phase of the common mode current, the same phase magnetic fields are generated in the first coil 11 and the second coil 12 to increase the inductive reactance of the inductor, thereby generating a great attenuation effect on the common mode current.
Referring to fig. 8, when a differential mode interference current is injected into the circuit, due to the existence of the magnetic bridge 5, the magnetic fields generated in the first coil 11 and the second coil 12 are unbalanced, the magnetic flux generated by the differential mode current is emitted by the single-side winding, and a loop is formed through the magnetic bridge 5, so that the differential mode interference current is attenuated by the differential mode inductance component formed by the differential mode magnetic field through the single-side winding.
The utility model discloses an integrated differential mode's common mode inductor and power can be at integrated differential mode filter inductance in common mode filter inductance, and greatly reduced components and parts cost saves space in circuit design, reduces whole manufacturing cost, improves product uniformity and reliability, and first magnetism post and the first coil of second magnetism post cooperation and second coil coiling can use machine automated production, and output is greatly promoted than traditional artifical threading coiling mode.
It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. The common-mode inductor is characterized by comprising an outer frame, a first coil (11) and a second coil (21), wherein the outer frame is integrally formed, and the outer frame comprises a first magnetic column (1) and a second magnetic column (2) which are arranged in parallel and are respectively wound by the first coil (11) and the second coil (21);
a third magnetic column (3) and a fourth magnetic column (4) which are connected with the first magnetic column (1) and the second magnetic column (2);
the first magnetic column (1), the second magnetic column (2), the third magnetic column (3) and the fourth magnetic column (4) are of an integrated structure made of the same magnetic conductive material;
the outer frame also comprises
The magnetic bridge (5) is arranged between the first magnetic column (1) and the second magnetic column (2), is parallel to the first magnetic column and the second magnetic column and has the same distance with the first magnetic column and the second magnetic column;
the two ends of the magnetic bridge (5) are respectively connected with the third magnetic column (3) and the fourth magnetic column (4), and a gap is arranged in the middle of the magnetic bridge to form an air gap.
2. An integrated differential-mode common-mode inductor according to claim 1, characterized in that the first coil (11) and the second coil (21) are of the same material and have the same number of turns.
3. An integrated differential-mode common-mode inductor according to claim 2, characterized in that the material of the first coil (11) and the second coil (21) is one of enamelled copper wire, enamelled aluminium wire, flat copper wire or flat aluminium wire.
4. An integrated differential-mode common-mode inductor according to claim 1, characterized in that the third magnetic leg (3) and the fourth magnetic leg (4) are parallel to each other and are not wound with a coil.
5. The integrated differential-mode common-mode inductor according to claim 4, wherein the first magnetic pillar (1), the second magnetic pillar (2), the third magnetic pillar (3) and the fourth magnetic pillar (4) are one of a rectangular plate structure, a cylindrical plate structure or an elliptical plate structure.
6. An integrated differential-mode common-mode inductor according to claim 1, characterized in that the magnetic bridge (5) is of a unitary structure with the casing.
7. The integrated differential-mode common-mode inductor according to claim 1, characterized in that the material of the magnetic bridge (5) is high permeability soft magnetic ferrite μ ≥ 10000.
8. The integrated differential-mode common-mode inductor according to claim 1, characterized in that the third magnetic pillar (3) and the fourth magnetic pillar (4) are provided with positioning slots for the magnetic bridge (5) to be clamped into on the side facing the inside of the outer frame;
the magnetic bridge (5) comprises limiting plates (51) which are clamped into the positioning grooves, and a magnetic bridge main body (52) which is connected between the two limiting plates (51).
9. An integrated differential-mode common-mode inductor according to claim 1, characterized in that the surfaces of the casing and the magnetic bridge (5) are covered with an insulating layer.
10. A power supply comprising an integrated differential mode common mode inductor according to any of claims 1-9 and a backbone (100) for mounting and securing the integrated differential mode common mode inductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921256102.4U CN210403487U (en) | 2019-08-05 | 2019-08-05 | Common mode inductor and power supply integrating differential mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921256102.4U CN210403487U (en) | 2019-08-05 | 2019-08-05 | Common mode inductor and power supply integrating differential mode |
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| CN210403487U true CN210403487U (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112185661A (en) * | 2020-09-29 | 2021-01-05 | 无锡晶磊电子有限公司 | Enameled aluminum wire pin connecting device based on inductor |
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2019
- 2019-08-05 CN CN201921256102.4U patent/CN210403487U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112185661A (en) * | 2020-09-29 | 2021-01-05 | 无锡晶磊电子有限公司 | Enameled aluminum wire pin connecting device based on inductor |
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