CN218631633U

CN218631633U - Large-current surface-mounted filter inductor

Info

Publication number: CN218631633U
Application number: CN202222811315.7U
Authority: CN
Inventors: 刘丽华; 张久烨; 裴艳慧
Original assignee: Beijing Seven Star Flight Electronic Co ltd
Current assignee: Beijing Seven Star Flight Electronic Co ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-03-14
Anticipated expiration: 2032-10-25

Abstract

The utility model relates to a large current table pastes filter inductor, large current table pastes filter inductor includes metal magnetism shell and coil. The metal magnetic shell comprises a first metal magnetic powder core and a second metal magnetic powder core which are mutually butted, and the first metal magnetic powder core and the second metal magnetic powder core respectively comprise a magnetic conduction bottom plate, a magnetic conduction column and a magnetic conduction block. The magnetic conduction column and the magnetic conduction blocks are arranged on the magnetic conduction bottom plate, the magnetic conduction blocks are arranged on two opposite sides of the magnetic conduction bottom plate, the magnetic conduction column is positioned between the two magnetic conduction blocks, and the space between the magnetic conduction block and the magnetic conduction column on the magnetic conduction bottom plate is a wire slot; the magnetic conduction column on the first metal magnetic powder core is abutted with the magnetic conduction column on the second metal magnetic powder core. The coil is sleeved on the magnetic conduction column and is positioned in the wire slot. The coil is installed in two metal magnetism shells, and the metal magnetism shell is equivalent to the magnetic screen, can play the magnetic screen function, and there is the air gap in metal magnetic powder core material itself material, has avoided opening the air gap process.

Description

Large-current surface-mounted filter inductor

Technical Field

The utility model relates to an electronic components especially relates to a large current table pastes filter inductor.

Background

At present, the traditional inductor is mainly formed by winding an enameled wire on an annular magnetic core or winding an enameled wire on a framework to assemble the magnetic core and open an air gap, and the installation mode is generally plug-in mounting. However, the existing toroidal inductor has poor magnetic shielding performance, has large influence on a circuit, and has a complex processing process because an air gap needs to be formed.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a large current table pastes filter inductor aims at solving the problem that there are shielding property difference and processing technology complicacy in the inductor among the prior art.

(II) technical scheme

In order to solve the above problems, the present invention provides a large current surface mount filter inductor, which includes a metal magnetic housing and a coil;

the metal magnetic shell comprises a first metal magnetic powder core and a second metal magnetic powder core which are mutually butted, and the first metal magnetic powder core and the second metal magnetic powder core respectively comprise a magnetic conduction bottom plate, a magnetic conduction column and a magnetic conduction block;

the magnetic conduction column and the magnetic conduction blocks are arranged on the magnetic conduction bottom plate, the magnetic conduction blocks are arranged on two opposite sides of the magnetic conduction bottom plate, the magnetic conduction column is positioned between the two magnetic conduction blocks, and a slot is formed in a space between the magnetic conduction block and the magnetic conduction column on the magnetic conduction bottom plate; the magnetic conductive block on the first metal magnetic powder core is abutted with the magnetic conductive block on the second metal magnetic powder core, and the magnetic conductive column on the first metal magnetic powder core is abutted with the magnetic conductive column on the second metal magnetic powder core;

the coil cover is established on the magnetic conduction post, just the coil is located in the wire casing.

Preferably, the coil is a pancake coil.

Preferably, an insulating pad is arranged on the magnetic conductive bottom plate, the insulating pad is located in the wire slot, and the insulating pad is located between the magnetic conductive bottom plate and the coil.

Preferably, the insulating pad is a polyimide pad.

Preferably, the wire casing is further provided with adhesive glue, and the adhesive glue is located between the coil and the insulating pad.

Preferably, the magnetic conduction bottom plate is rectangular, and an opening is formed between the pair of magnetic conduction blocks on the magnetic conduction bottom plate; both ends of the coil can pass through the opening.

Preferably, the metal magnetic powder core is one of an iron powder core, a ferrosilicon alloy magnetic powder core, a sendust magnetic powder core and a molypermalloy magnetic powder core.

(III) advantageous effects

The utility model discloses install the coil in two metal casing, metal casing is equivalent to the magnetic screen, can play the magnetic screen function, has strengthened the utility model discloses filter inductor's magnetic screen performance is pasted to heavy current table, has reduced the interference to external circuit. In addition on the magnetic conduction bottom plate the protrusion set up magnetic conduction post and magnetic conduction piece, the coil cover is established on the magnetic conduction post, and magnetism is felt the line and can be formed the return circuit between magnetic conduction post, magnetic conduction bottom plate and magnetic conduction piece, because there is the air gap in metal magnetic powder core material own material, has avoided opening the air gap process, makes the utility model discloses large current table pastes filter inductor manufacturing process is simple.

Drawings

Fig. 1 is the structure diagram of the large current meter-mounted filter inductor of the present invention.

[ instruction of reference ]

1: a metal magnetic housing; 1-A: a first metal magnetic powder core; 1-B: a second metal magnetic powder core; 11: a magnetically conductive base plate; 12: a magnetically conductive post; 13: a magnetic conduction block; 14: a wire slot; 15: an insulating pad; 2: and a coil.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The utility model provides a filter inductor is pasted to heavy current table, filter inductor is pasted to heavy current table includes metal magnetism shell 1 and coil 2.

The metal magnetic shell 1 comprises a first metal magnetic powder core 1-A and a second metal magnetic powder core 1-B which are mutually butted, and the first metal magnetic powder core 1-A and the second metal magnetic powder core 1-B respectively comprise a magnetic conduction bottom plate 11, a magnetic conduction column 12 and a magnetic conduction block 13. The magnetic conduction column 12 and the magnetic conduction block 13 are both arranged on the magnetic conduction bottom plate 11, the magnetic conduction blocks 13 are arranged on two opposite sides of the magnetic conduction bottom plate 11, the magnetic conduction column 12 is positioned between the two magnetic conduction blocks 13, and a slot 14 is formed in the space between the magnetic conduction block 13 and the magnetic conduction column 12 on the magnetic conduction bottom plate 11; the magnetic conduction block 13 on the first metal magnetic powder core 1-A is abutted with the magnetic conduction block 13 on the second metal magnetic powder core 1-B, and the magnetic conduction column 12 on the first metal magnetic powder core 1-A is abutted with the magnetic conduction column 12 on the second metal magnetic powder core 1-B. The coil 2 is sleeved on the magnetic conduction column 12, and the coil 2 is positioned in the wire slot 14.

In the above scheme, install coil 2 in two metal casing, metal casing is equivalent to the magnetic shielding function, has strengthened the utility model discloses the magnetic shielding performance of large current table subsides filter inductor has reduced the interference to external circuit. Specifically, the utility model discloses the protrusion sets up magnetic conduction post 12 and magnetic conduction piece 13 on magnetic

conduction bottom plate

11, and 2 covers of coil are established on magnetic conduction post 12, and magnetism is felt the line and can be in the return circuit of formation between magnetic conduction post 12, magnetic conduction bottom plate 11 and magnetic conduction piece 13, because there is the air gap in metal magnetism powder core material itself, has avoided opening the air gap process, makes the utility model discloses large current table pastes filter inductor manufacturing process is simple. Meanwhile, the inductance of the product is guaranteed to meet the requirement, the air gap is formed in the existing product to achieve the required inductance, the metal magnetic powder core material has the air gap, and 2 turns of the coil can be adjusted during design.

In a preferred embodiment, the metallic magnetic powder core is one of an iron powder core, a ferrosilicon magnetic powder core, a sendust magnetic powder core, and a molypermalloy magnetic powder core.

Compared with a round enameled wire, the flat coil 2 of the coil 2 has the advantages that the heat dissipation area is increased, and the temperature rise is reduced. The flat coil 2 is formed by winding a wire into a plurality of turns and stacking the turns together, wherein the cross section of the wire is rectangular. The two ends of the flat coil 2 can be arranged on the circuit board through soldering tin, and compared with the existing direct insertion installation mode, the lead cutting is required to be carried out according to the position of the circuit board, so that the efficiency is improved, and the installation space is saved.

Further, an insulating pad 15 is arranged on the magnetic conduction bottom plate 11, the insulating pad 15 is located in the wire slot 14, and the insulating pad 15 is located between the magnetic conduction bottom plate 11 and the coil 2. The insulating pad 15 is a polyimide pad.

In addition, the wire casing 14 is also provided with adhesive glue, and the adhesive glue is positioned between the coil 2 and the insulating pad 15. The coil 2 can be firmly installed in the wire casing 14 through the adhesive glue.

Finally, the magnetic conduction bottom plate 11 is rectangular, and an opening is arranged between the pair of magnetic conduction blocks 13 on the magnetic conduction bottom plate 11; both ends of the coil 2 can pass through the openings. The openings are provided so that both ends of the coil 2 pass through, so that both ends of the coil 2 are connected to the corresponding circuits.

It should be understood that the above description of the embodiments of the present invention is only for illustrating the technical lines and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, but the present invention is not limited to the above specific embodiments. All changes and modifications that come within the scope of the claims are to be embraced within their scope.

Claims

1. A large-current surface-mounted filter inductor is characterized by comprising a metal magnetic shell (1) and a coil (2);

the metal magnetic shell (1) comprises a first metal magnetic powder core (1-A) and a second metal magnetic powder core (1-B) which are mutually butted, and the first metal magnetic powder core (1-A) and the second metal magnetic powder core (1-B) respectively comprise a magnetic conduction bottom plate (11), a magnetic conduction column (12) and a magnetic conduction block (13);

the magnetic conduction column (12) and the magnetic conduction blocks (13) are arranged on the magnetic conduction bottom plate (11), the magnetic conduction blocks (13) are arranged on two opposite sides of the magnetic conduction bottom plate (11), the magnetic conduction column (12) is positioned between the two magnetic conduction blocks (13), and a slot (14) is formed in a space between the magnetic conduction block (13) and the magnetic conduction column (12) on the magnetic conduction bottom plate (11); a magnetic conduction block (13) on the first metal magnetic powder core (1-A) is abutted with a magnetic conduction block (13) on the second metal magnetic powder core (1-B), and a magnetic conduction column (12) on the first metal magnetic powder core (1-A) is abutted with a magnetic conduction column (12) on the second metal magnetic powder core (1-B);

the coil (2) is sleeved on the magnetic conduction column (12), and the coil (2) is located in the wire slot (14).

2. A high current surface mount filter inductor according to claim 1, wherein the coil (2) is a pancake coil.

3. A high current surface mount filter inductor according to claim 2, wherein an insulating pad (15) is provided on said magnetically conductive bottom plate (11), said insulating pad (15) being located within said wireway (14), and said insulating pad (15) being located between said magnetically conductive bottom plate (11) and said coil (2).

4. A high current surface mount filter inductor according to claim 3, wherein said insulating pad (15) is a polyimide pad.

5. A high current surface mount filter inductor according to claim 4, characterized in that an adhesive glue is further arranged in the wire slot (14), the adhesive glue being located between the coil (2) and the insulating pad (15).

6. A high current surface-mounted filter inductor according to any one of claims 1 to 5, wherein the magnetically conductive bottom plate (11) is rectangular, and an opening is provided between a pair of the magnetically conductive blocks (13) on the magnetically conductive bottom plate (11); both ends of the coil (2) can pass through the opening.

7. A high current surface mount filter inductor according to any of claims 1 to 3, wherein the first metal magnetic powder core (1-a) and the second metal magnetic powder core (1-B) are each one of a ferrite core, a sendust magnetic powder core, and a molypermalloy core.