Magnetic core with good stability

Abstract

The utility model belongs to the technical field of magnetic core, concretely relates to a good stability magnetic core, including half ring magnetic core body, half ring magnetic core body opening end one side surface connection plug -in block, the plug -in block surface is inserted in the surface of the slot, the slot is set up in half ring magnetic core body opening end surface, half ring magnetic core body surface cover in the placement groove of the surface of the shell set up. The utility model, through the plug -in block and the slot of half ring magnetic core body connection are inserted together, utilize the shell and the shell cover to exert even radial pressure to half ring magnetic core body at the same time, cooperate with the plug -in structure, can limit half ring magnetic core body connecting end displacement, avoid splicing surface separation, increase its connection stability, to improve its operating stability, utilize the shell and the shell cover of cover joint on the surface of half ring magnetic core body to the half ring magnetic core body through the heat conductivity of itself again and transmit the magnetic core heat to the outside, utilize the radiating groove on the shell again and strengthen air convection, avoid local overheating.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic core technology, and specifically relates to a magnetic core with good stability. Background Technology

[0002] The magnetic core is a sintered metal oxide made of magnetic materials such as ferrite, silicon steel, and permalloy. It is a key component in electronic components used to enhance electromagnetic performance. Its core function is to guide and concentrate magnetic lines of force through its high permeability, thereby enhancing the magnetic field strength around the coil and significantly increasing the inductance of the inductor coil, thus optimizing energy storage and release efficiency.

[0003] Different materials are suitable for different applications: Ferrite cores are available in manganese-zinc (low frequency) and nickel-zinc (high frequency) types, which are suitable for circuits below 1MHz and 1MHz to 1GHz, respectively; Silicon steel cores are widely used in low-frequency equipment such as power transformers due to their high saturation magnetic induction intensity; Permalloy, amorphous and nanocrystalline cores are used in precision instruments, high-frequency switching power supplies and other fields due to their high permeability or low loss characteristics.

[0004] The magnetic core comes in various shapes, such as toroidal, C-shaped, and can-shaped, each with its own advantages. It can be selected according to the circuit's requirements for leakage flux control, winding convenience, and heat dissipation, ultimately achieving the goal of reducing hysteresis loss and improving energy conversion efficiency. It is the core support for the normal operation of devices such as inductors and transformers.

[0005] Existing semi-toroidal magnetic cores are generally spliced ​​together during use. However, the splicing of two semi-toroidal magnetic cores relies on the adhesive force of the adhesive layer for fixation. Long-term high temperature or vibration may cause the adhesive layer to age and loosen, thus affecting the connection stability of the magnetic cores. Utility Model Content

[0006] The purpose of this invention is to provide a magnetic core with good stability, which aims to solve the problem that existing semi-ring magnetic cores are generally spliced ​​together when in use, but the splicing of two semi-ring magnetic cores relies on the adhesive force of the adhesive layer for fixation. Long-term high temperature or vibration may cause the adhesive layer to age and loosen, thus affecting the connection stability of the magnetic core.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a magnetic core with good stability, comprising a semi-ring magnetic core body, a plug connected to one side surface of the open end of the semi-ring magnetic core body, the surface of the plug inserted into the surface of a slot, the slot being opened on the open end surface of the semi-ring magnetic core body, the surface of the semi-ring magnetic core body fitting into a placement groove opened on the surface of a protective shell, the other side surface of the semi-ring magnetic core body abutting against a shell cover, a fixing lug connected to the inner wall surface of the shell cover, a plug connected to the surface of the fixing lug, the plug engaging and inserting into a limiting groove opened on the surface of a connecting block, the surface of the connecting block connecting to the inner wall surface of the protective shell, and a heat dissipation groove annularly opened on the surface of the protective shell.

[0008] As a preferred embodiment of the present invention for a magnetic core with good stability, the insert is a trapezoidal block whose shape and size are adapted to the slot.

[0009] As a preferred embodiment of the present invention for a magnetic core with good stability, the placement groove is a circular groove whose shape and size are adapted to the two sets of interlocking semi-ring magnetic core bodies.

[0010] As a preferred embodiment of the present invention for a magnetic core with good stability, the limiting groove is a circular groove whose shape and size are adapted to the insertion rod, and a spherical rubber protrusion is connected to the side of the insertion rod near the fixing ear, the shape and size of which are adapted to the groove on the surface of the limiting groove.

[0011] As a preferred magnetic core with good stability according to this utility model, the two sets of connecting blocks are symmetrically distributed on the inner wall of the protective shell, and the insert rod, the limiting groove and the connecting block form a snap-fit ​​structure.

[0012] As a preferred embodiment of the present invention for a magnetic core with good stability, the heat dissipation grooves are rectangular through grooves with equal spacing, and the five sets of heat dissipation grooves are distributed in a ring on the surface of the protective shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The semi-annular magnetic core is connected to the plug and slot on the main body by plugging them together. At the same time, the shell and cover apply uniform radial pressure to the semi-annular magnetic core. With the plug-in structure, the displacement of the connection end of the semi-annular magnetic core can be restricted, the splicing surface can be prevented from separating, and its connection stability can be increased, thereby improving its operational stability. At the same time, the shell and cover fitted on the surface of the semi-annular magnetic core transfer the heat of the core to the outside through its own thermal conductivity. The heat dissipation grooves on the shell enhance air convection and prevent local overheating. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded front view of this utility model;

[0018] Figure 3 This is a side view of the exploded cross-section of the protective shell and shell cover of this utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the semi-ring magnetic core body of this utility model.

[0020] In the diagram: 1. Semi-ring magnetic core body; 2. Insert block; 3. Slot; 4. Protective shell; 5. Placement slot; 6. Shell cover; 7. Fixing ear; 8. Insert rod; 9. Limiting slot; 10. Connecting block; 11. Heat dissipation slot. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 The present invention provides the following technical solution: a magnetic core with good stability, comprising a semi-ring magnetic core body 1, a plug 2 connected to one side surface of the open end of the semi-ring magnetic core body 1, the surface of the plug 2 being inserted into the surface of the slot 3, the slot 3 being opened on the open end surface of the semi-ring magnetic core body 1, the surface of the semi-ring magnetic core body 1 being fitted into the placement groove 5 opened on the surface of the protective shell 4, the other side surface of the semi-ring magnetic core body 1 abutting against the shell cover 6, the inner wall surface of the shell cover 6 being connected to the fixing ear 7, the surface of the fixing ear 7 being connected to the plug rod 8, the surface of the plug rod 8 being engaged and inserted into the limiting groove 9 opened on the surface of the connecting block 10, the surface of the connecting block 10 being connected to the inner wall surface of the protective shell 4, and the surface of the protective shell 4 having a ring-shaped heat dissipation groove 11.

[0023] Preferably, the insert 2 is a trapezoidal block whose shape and size are adapted to the slot 3.

[0024] In practical use, the plug 2 connected to one side of the open end of the surface of the half-ring magnetic core body 1 is inserted into the slot 3 opened on the surface of the other half-ring magnetic core body 1. At the same time, the plug 2 and slot 3 between the two half-ring magnetic core bodies 1 are respectively plugged into each other to fix the connection between the two.

[0025] Preferably, the placement groove 5 is a circular groove, the shape and size of which are adapted to the two sets of interlocking semi-ring magnetic core bodies 1.

[0026] In practical use, the semi-ring magnetic core body 1 is placed in the placement groove 5 opened in the inner wall of the protective shell 4, so as to fix the surface of the semi-ring magnetic core body 1 and prevent its insertion surface from slipping or shifting position.

[0027] Preferably, the limiting groove 9 is a circular groove whose shape and size are adapted to the insertion rod 8. The surface of the insertion rod 8 near the fixing ear 7 is connected to a spherical rubber protrusion whose shape and size are adapted to the groove on the surface of the limiting groove 9. The insertion rod 8 is made of glass fiber reinforced plastic, which can withstand greater insertion and extraction forces or vibration stress, and is suitable for fixing high-power magnetic cores.

[0028] In practical use, the insertion rod 8 connected to the fixing ear 7 on one side of the shell cover 6 can be engaged and inserted into the limiting groove 9, thereby using the spherical rubber protrusion connected to the surface of the insertion rod 8 to engage and fix it in the limiting groove 9, thus fixing the position of the opening end of the shell cover 6 and the protective shell 4.

[0029] Preferably, two sets of connecting blocks 10 are symmetrically distributed on the inner wall of the protective shell 4, and the insertion rod 8, the limiting groove 9 and the connecting blocks 10 form a snap-fit ​​connection structure.

[0030] In practical use, two sets of connecting blocks 10 connected to the inner wall of the protective shell 4 are used to engage the insertion rod 8, thereby fixing the connection between the protective shell 4 and the cover 6.

[0031] Preferably, the heat dissipation groove 11 is a rectangular through groove with equal spacing, and five sets of heat dissipation grooves 11 are distributed in a ring on the surface of the protective shell 4.

[0032] In practical use, when the semi-ring magnetic core body 1 generates heat during operation, the heat generated by the semi-ring magnetic core body 1 during operation can be dissipated through air convection by the cooperation of the protective shell 4 and the shell cover 6 made of metal composite materials such as aluminum alloy, and by the cooperation of their high thermal conductivity and the five sets of heat dissipation grooves 11 opened in a ring on the protective shell 4.

[0033] Working principle: When connecting two semi-ring magnetic core bodies 1, the insert 2 connected to the open end of one semi-ring magnetic core body 1 is inserted into the slot 3 opened on the surface of the other semi-ring magnetic core body 1. Simultaneously, the insert 2 and slot 3 of the two semi-ring magnetic core bodies 1 are interlocked, thus fixing the connection. In practical use, the insert 2 can be made of engineering plastic or insulating composite material, depending on the application. The interference fit (+0.05~+0.3mm) between the insert 2 and slot 3 is suitable for plastic or composite insert 2. During assembly, slight compression generates friction, which can increase the pull-out resistance by 30%. After inserting the two semi-ring magnetic core bodies 1 together, the semi-ring magnetic core bodies 1 are placed in the placement groove 5 opened in the inner wall of the protective shell 4, thereby fixing the surface of the semi-ring magnetic core bodies 1 and preventing slippage or positional displacement of the insertion surface. After placing the two semi-ring magnetic core bodies 1 together, the insertion rod 8 connected to the fixing lug 7 on one side of the shell cover 6 can be engaged and inserted into the limiting groove 9. The spherical rubber protrusion connected to the surface of the insertion rod 8 is then engaged and fixed in the limiting groove 9, thereby fixing the position of the shell cover 6 and the opening end of the protective shell 4, and fixing the position of the semi-ring magnetic core bodies 1. The housing 4 and cover 6 are then fixed in place, protecting the semi-ring core 1 inside and preventing it from being directly impacted by external components. When the semi-ring core 1 generates heat during operation, the housing 4 and cover 6, made of aluminum alloy or other metal composite materials, work together to dissipate the heat generated by the semi-ring core 1 through air convection, thanks to their high thermal conductivity and the five sets of heat dissipation slots 11 on the housing 4. The heat dissipation efficiency is more than 30% higher than that of plastic. Then, the semi-ring core 1 can be fixed to the PCB with a special bracket according to the usage requirements.

[0034] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic core with good stability, comprising a semi-toroidal core body (1), characterized in that: The surface of one side of the open end of the semi-ring magnetic core body (1) is connected to the plug (2), the surface of the plug (2) is inserted into the surface of the slot (3), the slot (3) is opened on the surface of the open end of the semi-ring magnetic core body (1), the surface of the semi-ring magnetic core body (1) is fitted into the placement groove (5) opened on the surface of the protective shell (4), the other side of the surface of the semi-ring magnetic core body (1) abuts against the shell cover (6), the inner wall surface of the shell cover (6) is connected to the fixing ear (7), the surface of the fixing ear (7) is connected to the plug rod (8), the surface of the plug rod (8) is engaged and inserted into the limiting groove (9) opened on the surface of the connecting block (10), the surface of the connecting block (10) is connected to the inner wall surface of the protective shell (4), and the surface of the protective shell (4) has a ring-shaped heat dissipation groove (11).

2. The magnetic core with good stability according to claim 1, characterized in that: The insert (2) is a trapezoidal block whose shape and size are adapted to the slot (3).

3. The magnetic core with good stability according to claim 1, characterized in that: The placement groove (5) is a circular groove whose shape and size are adapted to the two sets of interlocking semi-ring magnetic core bodies (1).

4. The magnetic core with good stability according to claim 1, characterized in that: The limiting groove (9) is a circular groove whose shape and size are adapted to the insertion rod (8). The surface of the insertion rod (8) near the fixing ear (7) is connected to a spherical rubber protrusion whose shape and size are adapted to the groove on the surface of the limiting groove (9).

5. A magnetic core with good stability according to claim 4, characterized in that: The two sets of connecting blocks (10) are symmetrically distributed on the inner wall of the protective shell (4), and the insert rod (8), the limiting groove (9) and the connecting block (10) form a snap-fit ​​connection structure.

6. A magnetic core with good stability according to claim 1, characterized in that: The heat dissipation groove (11) is a rectangular through groove with equal spacing, and five sets of the heat dissipation groove (11) are distributed in a ring on the surface of the protective shell (4).

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