Cobalt-based amorphous magnetic bead

Abstract

The utility model discloses a cobalt-based amorphous magnetic bead which comprises a magnetic bead body, the magnetic bead body is composed of a cobalt-based amorphous magnetic core and an insulating shell, the insulating shell wraps the inner surface and the outer surface of the cobalt-based amorphous magnetic core, an axial through hole is formed in the magnetic bead body, and the diameter of the through hole is 0.8-2.0 mm. According to the utility model, the cobalt-based amorphous magnetic core is selected to manufacture the magnetic bead, so that the magnetic bead can play roles of peak suppression and noise reduction at the input end of a power supply, the noise is actively eliminated from the source of a circuit, and the magnetic bead is more suitable for various circuits with very strict noise requirements, such as high-precision instruments and meters.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a cobalt-based amorphous magnetic bead. Background Art

[0002] The function of magnetic beads is mainly to eliminate high-frequency electromagnetic noise and spike interference in the circuit. At present, the magnetic beads on the market are mainly nickel-zinc ferrite beads, which are mainly used to absorb or minimize the noise that has been generated in the circuit. They are passive absorption devices, and the effectiveness of noise reduction is directly affected by the circuit frequency. The selection of magnetic beads has strict requirements on the magnetic permeability of the material, and there is a lack of consideration for the frequency. Therefore, the effect of using ferrite beads in high-precision instruments, meters and other circuits that have very strict requirements on high-frequency electromagnetic noise and spike interference is not good. Utility Model Content

[0003] The utility model aims at the defects of the prior art and provides a cobalt-based amorphous magnetic bead, which is installed in the circuit in the form of a through-core magnetic bead or in the form of a semiconductor pin at the power input end, so that the circuit can suppress the generation of noise before it is formed, and actively eliminate the noise from the source. The utility model is particularly suitable for various high-frequency switching power supplies, precision instruments and various circuits with very strict requirements on noise, such as RF circuits, PLLs, oscillation circuits, ultra-high frequency memory circuits, etc., which all need to add magnetic beads to the power input part to suppress and convert electromagnetic interference.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A cobalt-based amorphous magnetic bead comprises a magnetic bead body, the magnetic bead body is composed of a cobalt-based amorphous magnetic core and an insulating shell, the insulating shell is coated on the inner and outer surfaces of the cobalt-based amorphous magnetic core, and the magnetic bead body is formed with an axial through hole, the diameter of the through hole is 0.8-2.0 mm. By selecting a cobalt-based amorphous magnetic core to make a magnetic bead, the magnetic bead can suppress peaks and reduce noise generation at the input end of the power supply, actively eliminate noise from the source of the circuit, and make the magnetic bead more suitable for high-precision instruments and various circuits with very strict noise requirements.

[0006] As a preferred technical solution, the diameter of the through hole is 1.0-1.5 mm.

[0007] As a preferred technical solution, the outer diameter of the magnetic bead body is 2.5 to 4.5 mm.

[0008] As a preferred technical solution, the outer diameter of the magnetic bead body is 3.0-4.0 mm.

[0009] As a preferred technical solution, the insulating housing is coated on the inner and outer surfaces of the cobalt-based amorphous magnetic core by injection molding or coating. By forming the insulating housing by injection molding, the insulating housing can be in close contact with the cobalt-based amorphous magnetic core, thereby avoiding resonance and noise caused by the existence of gaps.

[0010] As a preferred technical solution, the cobalt-based amorphous magnetic core has a laminated structure.

[0011] As a preferred technical solution, the cobalt-based amorphous magnetic core is formed by winding cobalt-based amorphous ribbon.

[0012] As a preferred technical solution, the thickness of each layer in the cobalt-based amorphous magnetic core is 0.015 - 0.025 mm.

[0013] As a preferred technical solution, it further includes a lead wire, and the lead wire is inserted into the through hole of the bead body.

[0014] As a preferred technical solution, the lead wire is adhesively connected to the bead body by glue.

[0015] Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, by using a cobalt-based amorphous magnetic core to make a magnetic bead, and installing it in the circuit in the form of a through-hole magnetic bead or sleeved on a semiconductor pin at the power input end, the magnetic bead can play a role in peak suppression and noise reduction at the power input end, so that the noise can be suppressed before it is formed, and the noise is actively eliminated from the source of the circuit. It is particularly suitable for various high-frequency switching power supplies, precision instruments and meters, and various circuits with very strict noise requirements, such as RF circuits, PLLs, oscillation circuits, circuits containing ultra-high-frequency memories, etc., all of which need to add magnetic beads at the power input part to suppress and convert electromagnetic interference.

[0016] To more clearly elaborate on the structural features, technical means, and the specific purposes and functions achieved by the present utility model, the following further details the present utility model in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic cross-sectional structure diagram in the axial direction of an embodiment of the present utility model;

[0018] Figure 2 is a schematic cross-sectional structure diagram in the radial direction of an embodiment of the present utility model;

[0019] Figure 3 is a schematic basic structure diagram of another embodiment of the present utility model.

[0020] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS:

[0021] 10. Magnetic bead body; 11. Cobalt-based amorphous magnetic core; 12. Insulating shell;

[0022] 13. Through hole; 20. Lead wire; 30. Glue. Detailed implementation manner

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] Please refer to Figure 1-2 As shown, a cobalt-based amorphous magnetic bead of the present utility model is characterized in that it includes a magnetic bead body 10, the magnetic bead body 10 is composed of a cobalt-based amorphous magnetic core 11 and an insulating shell 12, the insulating shell 12 covers the inner and outer surfaces of the cobalt-based amorphous magnetic core 11, the magnetic bead body 10 is formed with an axial through hole 13, the diameter of the through hole 13 is 0.8 - 2.0 mm, and the diameter of the through hole 13 is preferably 1.0 - 1.5 mm. By using a cobalt-based amorphous magnetic core 11 to make the magnetic bead, the magnetic bead can play a role in peak suppression and noise reduction at the input end of the power supply, actively eliminate noise from the source of the circuit, and make the magnetic bead more suitable for various circuits with very strict noise requirements such as high-precision instruments and meters.

[0026] In the present utility model, the outer diameter of the magnetic bead body 10 is 2.5 - 4.5 mm, and the outer diameter of the magnetic bead body 10 is preferably 3.0 - 3.8 mm.

[0027] Specifically, the insulating shell 12 covers the inner and outer surfaces of the cobalt-based amorphous magnetic core 11 by injection molding. By forming the insulating shell 12 by injection molding, the insulating shell 12 can be in close contact with the cobalt-based amorphous magnetic core 11, thereby avoiding resonance and noise caused by the existence of gaps. It should be understood that in actual use, the insulating shell 12 can also be formed by coating.

[0028] In the present utility model, the cobalt-based amorphous magnetic core 11 has a laminated structure, and the thickness of each layer in the cobalt-based amorphous magnetic core 11 is 0.015 - 0.025 mm.

[0029] Specifically, the cobalt-based amorphous magnetic core 11 is formed by winding cobalt-based amorphous ribbon.

[0030] As Figure 3 shown, as another embodiment of the present utility model, during actual use, it further includes a lead 20. The lead 20 is inserted into the through hole 13 of the bead body 10, and the lead 20 is adhesively connected to the bead body 10 through glue 30 to form a through-hole bead. It should be understood that during actual use, the bead body 10 can also be directly sleeved on the semiconductor pin without additionally preparing the lead 20.

[0031] In summary, the present utility model makes a bead by selecting a cobalt-based amorphous magnetic core, and installs it in the circuit in the form of a through-hole bead or sleeved on the semiconductor pin at the power input end. Thus, the bead can play a role in spike suppression and noise reduction at the power input end, suppressing the generation of noise before the noise is formed, actively eliminating noise from the source of the circuit, and is particularly suitable for various high-frequency switching power supplies, precision instruments and meters, and various circuits with very strict noise requirements, such as RF circuits, PLLs, oscillator circuits, circuits containing ultra-high-frequency memories, etc., all of which require adding beads at the power input part to suppress and convert electromagnetic interference.

[0032] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made to the above embodiments according to the technical reality of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A cobalt-based amorphous magnetic bead, characterized in that: The invention comprises a magnetic bead body, which is composed of an annular cobalt-based amorphous magnetic core and an insulating shell. The insulating shell covers the inner and outer surfaces of the cobalt-based amorphous magnetic core. The magnetic bead body is formed with an axial through hole, and the diameter of the through hole is 0.8-2.0 mm.

2. A cobalt-based amorphous magnetic bead according to claim 1, characterized in that: The diameter of the through hole is 1.0-1.5 mm.

3. A cobalt-based amorphous magnetic bead according to claim 1 or 2, characterized in that: The outer diameter of the magnetic bead body is 2.5-4.5 mm.

4. A cobalt-based amorphous magnetic bead according to claim 3, characterized in that: The outer diameter of the magnetic bead body is 3.0-4.0 mm.

5. A cobalt-based amorphous magnetic bead according to claim 1, characterized in that: The insulating shell is coated on the inner and outer surfaces of the cobalt-based amorphous magnetic core by injection molding or coating.

6. The cobalt-based amorphous magnetic bead according to claim 1, characterized in that: The cobalt-based amorphous magnetic core is a laminated structure.

7. A cobalt-based amorphous magnetic bead according to claim 6, characterized in that: The cobalt-based amorphous magnetic core is formed by winding a cobalt-based amorphous strip.

8. The cobalt-based amorphous magnetic bead according to claim 6, characterized in that: The thickness of each layer in the cobalt-based amorphous magnetic core is 0.015-0.025 mm.

9. The cobalt-based amorphous magnetic bead according to claim 1, characterized in that: It also includes a lead wire, which is inserted into the through hole of the magnetic bead body.

10. The cobalt-based amorphous magnetic bead according to claim 9, characterized in that: The lead is bonded and connected to the magnetic bead body by glue.

Images