CN212276977U

CN212276977U - Magnetic core structure containing magnetic bias magnet

Info

Publication number: CN212276977U
Application number: CN202021518247.XU
Authority: CN
Inventors: 赵长宽; 尹君; 程像标
Original assignee: Anhui Zhongfu Magnetoelectricity Co ltd
Current assignee: Anhui Zhongfu Magnetoelectricity Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-01-01
Anticipated expiration: 2030-07-28

Abstract

The utility model discloses a magnetic core structure containing magnetic bias magnet, in particular to the technical field of magnetic cores, including ferrite core pipe, the inside magnetic bias subassembly and a plurality of connecting rods of being equipped with of ferrite core pipe, the magnetic bias subassembly is fixed on the inner wall of ferrite core pipe through the connecting rod, the magnetic bias subassembly includes bias magnet, the first paster and the second paster of laminating in bias magnet both sides, the fixed apron of cover locating the bias magnet top, the top of first paster and second paster is pegged graft in the inside of fixed apron; bias magnet includes a plurality of first iron core pieces, second iron core piece and permanent magnet, the outside of first iron core piece and second iron core piece has all wrapped up insulating material, irregular shape design is personally submitted in the laminating of first iron core piece and second iron core piece. The utility model discloses can the effectual iron core loss that reduces the magnetic core, make permanent magnet magnetism biased side effect fall to minimumly, the stack characteristic is stable.

Description

Magnetic core structure containing magnetic bias magnet

Technical Field

The utility model relates to a magnetic core technical field, more specifically say, the utility model relates to a magnetic core structure that contains magnetism biasing magnet.

Background

In recent years, as demands for miniaturization of electronic devices have been increasing and electronic components have been also required to be miniaturized, magnetic gaps of cores have become smaller and smaller, and demands for cores for direct current superposition having high magnetic permeability have become stronger.

In order to meet this requirement, a magnetic core having a high saturation magnetization must be selected, however, since the saturation magnetization is inevitably determined by the composition of the material, the saturation magnetization cannot be increased infinitely. The DC magnetic field generated by the superposition of DC is counteracted by using the permanent magnet magnetic bias. However, when a conventional metal permanent magnet is used, a phenomenon in which core loss increases occurs, and when a ferrite magnet is used, the superposition characteristics are unstable.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a following technical scheme: a magnetic core structure containing a magnetic bias magnet comprises a ferrite magnetic core pipe, wherein a magnetic bias assembly and a plurality of connecting rods are arranged in the ferrite magnetic core pipe, the magnetic bias assembly is fixed on the inner wall of the ferrite magnetic core pipe through the connecting rods, the magnetic bias assembly comprises a bias magnet, a first patch, a second patch and a fixed cover plate, the first patch and the second patch are attached to two sides of the bias magnet, the fixed cover plate is sleeved on the top of the bias magnet, and the tops of the first patch and the second patch are inserted into the fixed cover plate;

the bias magnet comprises a plurality of first iron chips, second iron chips and a permanent magnet, insulating materials are wrapped outside the first iron chips and the second iron chips, the laminating surfaces of the first iron chips and the second iron chips are designed in an irregular shape, grooves formed in the laminating positions of the first iron chips and the second iron chips form mounting grooves of the permanent magnet, the permanent magnet is made of high-coercivity rare earth magnet powder and adhesive after mixing through pressing, and the permanent magnet is used for generating magnetic bias.

In a preferred embodiment, the first and second patches are respectively attached to two sides of the plurality of first and second core sheets, and are adhered by an adhesive to fix the first and second core sheets.

In a preferred embodiment, the number of the connecting rods is two, and the ends of the two connecting rods are respectively connected to the plurality of first core pieces and the plurality of second core pieces.

In a preferred embodiment, a screw extending into the bias magnet penetrates through the fixing cover plate, and the fixing cover plate is mounted on the tops of the first iron core plate, the second iron core plate, the first patch and the second patch through the screw.

In a preferred embodiment, the outer part of the magnetic bias assembly further comprises a layer of electronic sealing silica gel, and the mounting groove is positioned in the middle of the permanent magnet.

The utility model discloses a technological effect and advantage:

the utility model discloses a two sets of iron core pieces of laminating each other, and set up its junction binding face into irregular form, can increase the seam regional area of first iron core piece and second iron core piece, only have the iron core of two sets of iron core pieces of first iron core piece and second iron core piece component simultaneously, reduced the seam number of iron core, mutual insulation between the iron core piece simultaneously, iron core loss that can effectual reduction magnetic core makes permanent magnet magnetic offset's side effect fall to minimumly, and the stack characteristic is stable.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of a detailed structure of the position a in fig. 1 according to the present invention.

Fig. 3 is a schematic diagram of the internal structure of the ferrite core tube according to the present invention.

Fig. 4 is a left side view of the magnetic bias assembly of the present invention.

Fig. 5 is a right-side view structural diagram of the magnetic bias assembly of the present invention.

Fig. 6 is a schematic cross-sectional view taken along the line B-B in fig. 5 according to the present invention.

Fig. 7 is a schematic view of a part of the second iron core plate of the present invention.

The reference signs are: the magnetic core comprises a ferrite core tube 1, a magnetic bias component 2, a connecting rod 3, a bias magnet 4, a first patch 5, a second patch 6, a fixed cover plate 7, a first iron core piece 8, a second iron core piece 9, a permanent magnet 10, an installation groove 11, screws 12, 13, 14, 15, 16, 17, 18, 19 and 20.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

As shown in fig. 1-7, a magnetic core structure including a magnetic bias magnet 4 includes a ferrite core tube 1, a magnetic bias assembly 2 and a plurality of connecting rods 3 are disposed inside the ferrite core tube 1, the magnetic bias assembly 2 is fixed on an inner wall of the ferrite core tube 1 through the connecting rods 3, the magnetic bias assembly 2 includes a bias magnet 4, a first patch 5 and a second patch 6 attached to two sides of the bias magnet 4, and a fixed cover plate 7 sleeved on a top of the bias magnet 4, tops of the first patch 5 and the second patch 6 are inserted into the fixed cover plate 7, and by disposing the bias magnet 4 inside the ferrite core tube 1, a direct current magnetic field generated by superposition of direct currents can be offset;

as shown in fig. 3-7, the bias magnet 4 includes a plurality of first iron core pieces 8, second iron core pieces 9 and permanent magnets 10, the first iron core pieces 8 and the second iron core pieces 9 are wrapped with insulating materials, the insulating materials can realize insulation among the plurality of iron core pieces, so that eddy current loss of the iron core pieces is reduced, the joint surfaces of the first iron core pieces 8 and the second iron core pieces 9 are designed in an irregular shape, the joint areas of the first iron core pieces 8 and the second iron core pieces 9 can be increased, and meanwhile, only two groups of iron core pieces of the first iron core pieces 8 and the second iron core pieces 9 form an iron core, so that the number of joints of the iron core is reduced, and iron core loss of the iron core is further reduced;

as shown in fig. 6-7, the grooves formed at the joint of the first iron core piece 8 and the second iron core piece 9 form a mounting groove 11 of a permanent magnet 10, the permanent magnet 10 is formed by mixing high-coercivity rare earth magnet powder and an adhesive and then pressing, the permanent magnet 10 is used for generating magnetic bias, and the permanent magnet 10 made of the material is placed in the mounting grooves 11 in the first iron core piece 8 and the second iron core piece 9 and kept in the middle, so that the direct current superposition characteristic of the magnetic core can be improved, and the temperature of the magnetic core is increased;

as shown in fig. 4-5, the first and

second patches

5 and 6 are respectively attached to two sides of the plurality of first and

second core pieces

8 and 9, and are bonded by an adhesive to fix the first and

second core pieces

8 and 9, so that the integrity of the bias magnet 4 can be ensured, and looseness during long-term use can be prevented;

as shown in fig. 3 to 6, the number of the connecting rods 3 is two, the end portions of the two connecting rods 3 are respectively connected to the plurality of first core pieces 8 and the plurality of second core pieces 9, and the connecting rods 3 are used for fixing the bias magnets 4 and the bias magnets 4;

as shown in fig. 6, a screw 12 extending into the offset magnet 4 penetrates through the fixed cover plate 7, the fixed cover plate 7 is mounted on the top of the first iron core piece 8, the second iron core piece 9, the first patch 5 and the second patch 6 through the screw 12, and the fixed cover plate 7 fixes the plurality of iron core pieces and the patches together to form a whole, so that the stability is improved, and looseness is prevented during long-time use;

as shown in fig. 1-2 and fig. 6, the outside of the magnetic bias assembly 2 further comprises a layer of electronic sealing silica gel, the mounting groove 11 is located in the middle of the permanent magnet 10, and the electronic sealing silica gel wraps the bias magnetic assembly, so that the integrity is ensured, the stability is further improved, and the looseness in the long-time use process is prevented.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present disclosure. The structures, devices, and methods of operation of the present invention, not specifically described and illustrated, are generally practiced by those of ordinary skill in the art without specific recitation or limitation.

Claims

1. A core structure including a magnetically biased magnet, comprising a ferrite core tube, wherein: the magnetic bias assembly is fixed on the inner wall of the ferrite core tube through the connecting rods and comprises a bias magnet, a first patch, a second patch and a fixed cover plate, wherein the first patch and the second patch are attached to two sides of the bias magnet, the fixed cover plate is sleeved on the top of the bias magnet, and the tops of the first patch and the second patch are inserted into the fixed cover plate;

2. A core structure including a magnetically biased magnet as claimed in claim 1, wherein: the first patch and the second patch are respectively attached to two sides of the plurality of first iron core pieces and the second iron core pieces and are bonded through an adhesive, and the first patch and the second patch are used for fixing the first iron core pieces and the second iron core pieces.

3. A core structure including a magnetically biased magnet as claimed in claim 1, wherein: the quantity of connecting rod is two, two the tip of connecting rod is connected respectively on a plurality of first iron core pieces and second iron core piece.

4. A core structure including a magnetically biased magnet as claimed in claim 1, wherein: the fixed cover plate is provided with a screw penetrating through the fixed cover plate and extending to the inside of the offset magnet, and the fixed cover plate is arranged on the tops of the first iron chip, the second iron chip, the first patch and the second patch through screws.

5. A core structure including a magnetically biased magnet as claimed in claim 1, wherein: the outside of magnetism biasing subassembly still includes one deck electronic seal silica gel, the mounting groove is located the middle part of permanent magnet.