CN210006556U

CN210006556U - EIR type magnetic core central column

Info

Publication number: CN210006556U
Application number: CN201920956173.9U
Authority: CN
Inventors: 林开品; 邓辉玉; 朱华
Original assignee: HUNAN IDEA ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: HUNAN IDEA ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-01-31
Anticipated expiration: 2029-06-24

Abstract

The utility model discloses an EIR type magnetic core center post, including bottom plate, center post and limit leg, the center post is located the middle part of bottom plate up end, two the limit leg is located respectively the left end position and the right-hand member position of bottom plate up end, be equipped with the recess on the limit leg, the recess is convex, still includes PCB board and magnetic sheet, the PCB board with the magnetic sheet is the same cylindrical of cross section diameter, the magnetic sheet PCB board with the center post is the order of placing from top to bottom, the center post PCB board with the magnetic sheet bonds through the bonding glue, the effective area of magnetic sheet up end with center post cross sectional area is the same.

Description

EIR type magnetic core central column

Technical Field

The utility model relates to an kind of magnetic core center posts, concretely relates to kind EIR type magnetic core center posts.

Background

When the magnetic core is applied to a power transformer, a color TV transformer, a switching power supply and the like, power needs to be transferred by magnetization under the condition of large current or large current with direct-current bias field. Therefore, the manganese-zinc ferrite material has high magnetic flux density and high efficacy. While some scenarios simply increase the material flux density far short of the output power consumption required by the device scenario.

It is examples to use wire cut, spark discharge cut, etc. to open air gap on the iron core, we know that the air gap can avoid the magnetic saturation phenomenon under the condition of AC large signal or DC bias, and control the inductance better.

However, the larger the air gap is, the smaller the inductance of the iron core is, more coils need to be wound to achieve the inductance of , the related copper loss is increased, and in addition, the number of turns of the coil is large, the distributed capacitance is relatively increased, and the working stability of the electromagnetic element is affected, so that the air gap of 0.2+/-0.15mm is only ground on the center pillar of the magnetic core in practical application, the output power improved by the device is not prominent enough, and the requirement is difficult to meet when the device is applied to scenes such as 5G and the like which need more power.

Disclosure of Invention

In view of the above-mentioned deficiencies or inadequacies in the prior art, it would be desirable to provide EIR-type core center posts.

According to the technical scheme that this application embodiment provided, EIR type magnetic core center posts, including bottom plate, center post and limit leg, the bottom plate is the rectangle plate, the center post is the cylinder shape, the center post is located the middle part of bottom plate up end, the quantity of limit leg is two, two the limit leg is located respectively the left end position and the right-hand member position of bottom plate up end, be equipped with the recess on the limit leg, the recess is convex, is located the bottom plate left end face the recess is located on the right-hand member face of limit leg, is located the bottom plate right-hand member face the recess is located on the left end face of limit leg, still include PCB board and magnetic sheet, the PCB board with the magnetic sheet is the same cylinder of cross section diameter, the magnetic sheet the PCB board with the magnetic sheet is for the order of placing from top to bottom, the center post the PCB board with the magnetic sheet bonds through the bonding glue, the effective area of magnetic sheet up end with center post cross section area is the same.

The utility model discloses in, the length of bottom plate does between the bottom plate width.

The utility model discloses in, the cross section diameter of recess does the twice of magnetic sheet cross section diameter, the height of recess with the height of limit leg is the same.

The utility model discloses in, the height of limit leg is greater than the height of center post the height of PCB board with the high sum of magnetic sheet.

In the utility model, the cross section diameter of the magnetic sheet is less than two the distance between the side legs.

To sum up, the beneficial effect of this application: the theoretical air gap amount of the device is greatly increased, the output power of the magnetic core in application is greatly increased, and the magnetic core cannot be easily saturated.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic front view of the overall device of the present invention;

FIG. 2 is a schematic top view of the overall device of the present invention;

fig. 3 is a diagram of the practical application of the device of the present invention.

Reference numbers in the figures: a bottom plate-1; a central column-2; a side leg-3; a groove-4; PCB board-5; magnetic sheet-6.

Detailed Description

The present application is described in further detail in with reference to the drawings and the examples, it being understood that the specific examples are set forth herein for the purpose of illustration only and are not intended to be limiting.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, EIR-type magnetic core central columns include a bottom plate 1, a central column 2 and two side legs 3, wherein the bottom plate 1 is a rectangular plate, the central column 2 is in a cylindrical shape, the central column 2 is located in the middle of the upper end surface of the bottom plate 1, the two side legs 3 are respectively located at the left end and the right end of the upper end surface of the bottom plate 1, the EIR-type magnetic core central column further includes a PCB 5 and a magnetic sheet 6, the PCB 5 and the magnetic sheet 6 are both in a cylindrical shape with the same cross-sectional diameter, the magnetic sheet 6, the PCB 5 and the central column 2 are placed in order from top to bottom, the central column 2, the PCB 5 and the magnetic sheet 6 are bonded by a bonding adhesive, the effective area of the upper end surface of the magnetic sheet 6 is the same as the cross-sectional area of the central column 2, the length of the bottom plate 1 is 3-4 times of the width of the bottom plate 1, the height of the side legs 3 is greater than the height of the central column 2, the height of the central column 5 is equal to the height of the magnetic sheet 6.

As shown in fig. 2, the side legs 3 are provided with grooves 4, the grooves 4 are arc-shaped, the grooves 4 located on the left end surface of the bottom plate 1 are located on the right end surface of the side legs 3, the grooves 4 located on the right end surface of the bottom plate 1 are located on the left end surface of the side legs 3, the cross section diameter of the grooves 4 is twice that of the magnetic sheets 6, and the heights of the grooves 4 are the same as those of the side legs 3.

Open a way the magnetic core when using, for the magnetic line closure, need two to pair the use, divide two limit legs and center posts as usual, form closed magnetic line return circuit, closed position needs closely to cooperate, and the seamless butt joint of trying to get to the greatest extent, this application device will center post 2 cuts off longer (about 3 mm) part, can the UNICOM for the magnetic line of force, and does not reduce the effective length of magnetic core, guarantees magnetic core inductance factor, reduces the coil of wire winding copper line simultaneously, reduces the copper loss, is cutting off add piece on center post 2 PCB board 5 with center post 3 with the area (or effective area is the same) magnetic sheet 6, and with PCB board 5 magnetic sheet 6 with center post 2 glues for the magnetic line of force can normally UNICOM, inductance factor can guarantee, and theoretical air gap volume improves by a wide margin, improves the output when magnetic core uses greatly, and can not saturate easily.

The foregoing description is only exemplary of the preferred embodiments of the application and is provided for the purpose of illustrating the general principles of the technology and the like. Meanwhile, the scope of the invention according to the present application is not limited to the technical solutions in which the above-described technical features are combined in a specific manner, and also covers other technical solutions in which the above-described technical features or their equivalent are combined arbitrarily without departing from the inventive concept described above. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

The EIR type magnetic core central column is characterized in that the central column (2) is positioned in the middle of the upper end face of the bottom plate (1), the number of the side legs (3) is two, the two side legs (3) are respectively positioned at the left end part and the right end part of the upper end face of the bottom plate (1), the EIR type magnetic core central column is characterized in that the side legs (3) are provided with grooves (4), the grooves (4) are arc-shaped, the grooves (4) positioned at the left end face of the bottom plate (1) are positioned on the right end face of the side legs (3), the grooves (4) positioned at the right end face of the bottom plate (1) are positioned on the left end face of the side legs (3), the EIR type magnetic core central column further comprises a PCB (5) and a magnetic sheet (6), the PCB (5) and the magnetic sheet (6) are cylindrical, the cross section diameters of the magnetic sheet (6), the magnetic sheet (5) and the magnetic sheet (2) are positioned on the left end face of the bottom plate, and the magnetic sheet (6) is bonded with the central column (2) through the effective adhesive, and the central column (2) and the effective adhesive is positioned on the bottom plate.
2. The kinds of EIR type magnetic core central posts as claimed in claim 1, wherein the length of said bottom plate (1) is between 3-4 times the width of said bottom plate (1).
3. The kinds of EIR type magnetic core central posts as claimed in claim 1, wherein the cross-sectional diameter of said recessed groove (4) is twice the cross-sectional diameter of said magnetic sheet (6), and the height of said recessed groove (4) is the same as the height of said side leg (3).
4. The EIR magnetic core central posts of claim 1, wherein the height of each side leg (3) is greater than the sum of the height of the central post (2), the height of the PCB (5) and the height of the magnetic sheet (6).
5. The kinds of EIR type magnetic core central posts as claimed in claim 1, wherein the cross-sectional diameter of said magnetic sheet (6) is smaller than the distance between said two legs (3).