A surface mounted common and differential mode integrated inductor

Abstract

The utility model discloses a surface mounted common-differential mode integrated inductor, comprising: a first magnetic core, comprising a magnetic core shell with an opening at the upper end and a magnetic core column arranged inside the magnetic core shell; a second magnetic core, covering the opening of the first magnetic core; two flat coils, respectively wound around the magnetic core column in sequence along the longitudinal direction; a third magnetic core, placed between the two flat coils; an adhesive material, used to bond and assemble the components into one; wherein the first magnetic core, the second magnetic core and the third magnetic core together constitute a closed magnetic field. The common-differential mode integrated inductor provided by the utility model can solve the problems of low efficiency, easy damage, unstable welding quality, etc. of traditional manual assembly. The structural design can adopt surface mounting technology and be assembled through an automated production line, which greatly improves production efficiency and reduces human errors, thereby reducing the defective rate and improving product reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a surface mounted common-differential mode integrated inductor. Background Art

[0002] In the electromagnetic compatibility design of electronic equipment, common-differential mode integrated inductors are one of the key components used to effectively suppress common-mode and differential-mode interference in the circuit. However, traditional common-differential mode integrated inductors face multiple challenges in the production and assembly process. First, such inductors usually require manual assembly, which is not only inefficient, but also prone to component damage or assembly quality problems due to improper operation, which in turn affects the performance and reliability of the final product. In addition, wave soldering technology is commonly used in the traditional assembly process. Although wave soldering can provide stable soldering effects in some applications, it has poor adaptability to high-precision or miniaturized electronic components, and is prone to problems such as excessive solder, insufficient soldering or solder joint short circuits. Especially in mass production environments, these problems will significantly increase production costs and defective rates.

[0003] In view of the above problems, a new common-differential mode integrated inductor is urgently needed to improve production efficiency and product quality. Utility Model Content

[0004] The utility model aims to provide a surface mounted common-differential mode integrated inductor to solve the problems of low production efficiency and high defect rate of existing inductors.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A surface mounted common-differential mode integrated inductor, comprising:

[0007] A first magnetic core, comprising a magnetic core shell with an opening at an upper end and a magnetic core column arranged inside the magnetic core shell;

[0008] A second magnetic core, covering the opening of the first magnetic core;

[0009] Two flat coils are respectively and sequentially wound around the magnetic core column along the longitudinal direction;

[0010] A third magnetic core, disposed between the two flat coils;

[0011] The adhesive material is used to bond and assemble the components into one body; wherein the first magnetic core, the second magnetic core and the third magnetic core together form a closed magnetic field.

[0012] Preferably, the four corners of the first magnetic core are respectively provided with lead wire outlets, and the four corners of the second magnetic core are respectively provided with lead wire receiving grooves;

[0013] The two flat coils respectively have a pair of lead wires, and the lead wires of the two flat coils respectively extend along the lead wire outlets and are bent and fixed in the lead wire accommodating grooves.

[0014] Preferably, the shape of the portion of the lead wire of the flat coil extending along the lead wire outlet is U-shaped.

[0015] Preferably, the third magnetic core is provided in a circular ring sheet shape, and the thickness of the third magnetic core is 0.2-0.4 mm.

[0016] Preferably, the first magnetic core, the second magnetic core and the third magnetic core are all nickel-zinc magnetic cores.

[0017] Preferably, the two flat coils have the same number of turns and serve as common differential mode inductor windings.

[0018] Preferably, the middle portion of the inner bottom wall of the magnetic core shell protrudes upward to form the magnetic core column.

[0019] Preferably, the adhesive material is epoxy resin.

[0020] Compared with the prior art, the utility model has at least the following beneficial effects: the utility model is a surface mounted common-differential mode integrated inductor, comprising: a first magnetic core, comprising a magnetic core shell with an opening at the upper end and a magnetic core column arranged inside the magnetic core shell; a second magnetic core, covering the opening of the first magnetic core; two flat coils, respectively wound around the magnetic core column in sequence along the longitudinal direction; a third magnetic core, placed between the two flat coils; an adhesive material, used to bond and assemble the components into one; wherein the first magnetic core, the second magnetic core and the third magnetic core together constitute a closed magnetic field. The common-differential mode integrated inductor provided by the utility model can solve the problems of low efficiency, easy damage, unstable welding quality, etc. of traditional manual assembly. The structural design can adopt surface mounting technology and be assembled through an automated production line, which greatly improves production efficiency and reduces human errors, thereby reducing the defective rate and improving product reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the inductor of the utility model;

[0022] Figure 2 It is a schematic diagram of the structural decomposition of the inductor of the utility model.

[0023] In the figure: 1. first magnetic core; 11. magnetic core shell; 12. magnetic core column; 13. lead outlet; 2. second magnetic core; 21. lead receiving groove; 3. flat coil; 31. lead; 4. third magnetic core. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-2 The utility model provides a surface mounted common-differential mode integrated inductor, comprising:

[0026] The first magnetic core 1 comprises a magnetic core shell 11 with an opening at the upper end and a magnetic core column 12 arranged inside the magnetic core shell 11;

[0027] The second magnetic core 2 is arranged to cover the opening of the first magnetic core 1;

[0028] Two flat coils 3 are respectively and sequentially wound around the magnetic core column 12 along the longitudinal direction;

[0029] A third magnetic core 4 is placed between the two flat coils 3;

[0030] The adhesive material is used to bond and assemble the components into one body; wherein the first magnetic core 1, the second magnetic core 2 and the third magnetic core 4 together form a closed magnetic field.

[0031] Compared with the prior art, the advantages of the present invention are embodied in the following aspects:

[0032] 1) Improve production efficiency and assembly speed: Automated assembly reduces manpower requirements and improves the operating efficiency of the production line.

[0033] 2) Reduce component damage: Due to the reduction of manual operations, the damage rate of components during the assembly process is greatly reduced.

[0034] 3) Improve soldering quality: Surface mount technology provides more precise soldering control and reduces soldering defects compared to wave soldering.

[0035] In one embodiment of the present application, the four corners of the first magnetic core 1 are respectively provided with lead wire outlets 13, and the four corners of the second magnetic core 2 are respectively provided with lead wire receiving grooves 21;

[0036] The two flat coils 3 each have a pair of lead wires 31 . The lead wires 31 of the two flat coils 3 extend out from the lead wire outlets 13 and are bent and fixed in the lead wire receiving grooves 21 .

[0037] Among them, by designing the lead outlets 13 and the lead receiving grooves 21 at the four corners of the magnetic core, the arrangement of the leads 31 is more orderly and the structure is more compact, which helps to reduce electromagnetic interference and improve the performance stability of the inductor.

[0038] In one embodiment of the present application, the lead wire 31 of the flat coil 3 is in a U-shape along the lead wire outlet 13. The U-shaped lead wire 31 helps to reduce space occupation and optimize circuit layout, and reduce electromagnetic interference between coils.

[0039] In one embodiment of the present application, the third magnetic core 4 is arranged in a circular ring sheet shape, and the thickness of the third magnetic core 4 is 0.2-0.4 mm, preferably 0.3 mm. The third magnetic core 4 is used to provide a safe insulation distance between the two windings and provide differential mode characteristics. The circular ring sheet design of the third magnetic core 4 increases the compactness of the inductor structure and effectively improves the performance of the inductor.

[0040] In one embodiment of the present application, the first magnetic core 1, the second magnetic core 2 and the third magnetic core 4 are all nickel-zinc magnetic cores. The use of nickel-zinc magnetic cores can provide higher magnetic permeability and lower core loss, which is suitable for high-frequency applications and improves the overall performance of the inductor.

[0041] In one embodiment of the present application, the two flat coils 3 have the same number of turns and serve as common and differential mode inductor windings to ensure that the inductance and impedance of the two flat coils 3 match and optimize the common mode and differential mode suppression effects.

[0042] In one embodiment of the present application, the middle portion of the inner bottom wall of the magnetic core shell 11 protrudes upward to form a magnetic core column 12. The magnetic core column 12 formed by the inner bottom wall of the magnetic core shell 11 protruding upward helps to ensure uniformity and accuracy of coil winding, and also facilitates the formation and closure of the magnetic field, thereby enhancing the electromagnetic performance of the inductor.

[0043] In one embodiment of the present application, the adhesive material is epoxy resin. Using epoxy resin as the adhesive material not only ensures the fixation of each component and the overall mechanical stability, but also provides good thermal stability and electrical insulation, thereby enhancing the durability and safety of the product.

[0044] It should be noted that the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field and will not be repeated here.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A surface mounted common-differential mode integrated inductor, characterized in that: include: A first magnetic core, comprising a magnetic core shell with an opening at an upper end and a magnetic core column arranged inside the magnetic core shell; A second magnetic core, covering the opening of the first magnetic core; Two flat coils are respectively and sequentially wound around the magnetic core column along the longitudinal direction; A third magnetic core, disposed between the two flat coils; The adhesive material is used to bond and assemble the components into one body; wherein the first magnetic core, the second magnetic core and the third magnetic core together form a closed magnetic field.

2. The surface mounted common-differential mode integrated inductor according to claim 1, characterized in that: The four corners of the first magnetic core are respectively provided with lead wire outlets, and the four corners of the second magnetic core are respectively provided with lead wire receiving grooves; The two flat coils respectively have a pair of lead wires, and the lead wires of the two flat coils respectively extend along the lead wire outlets and are bent and fixed in the lead wire accommodating grooves.

3. The surface mounted common-differential mode integrated inductor according to claim 1, characterized in that: The shape of the part of the lead wire of the flat coil extending along the lead wire outlet is U-shaped.

4. The surface mounted common-differential mode integrated inductor according to claim 1, characterized in that: The third magnetic core is arranged in a circular ring sheet shape, and the thickness of the third magnetic core is 0.2-0.4 mm.

5. The surface mounted common-differential mode integrated inductor according to claim 1, characterized in that: The first magnetic core, the second magnetic core and the third magnetic core are all nickel-zinc magnetic cores.

6. The surface mounted common-differential mode integrated inductor according to claim 1, characterized in that: The two flat coils have the same number of turns and serve as common differential mode inductor windings.

7. The surface mounted common-differential mode integrated inductor according to claim 1, characterized in that: The middle part of the inner bottom wall of the magnetic core shell protrudes upward to form the magnetic core column.

8. The surface mounted common-differential mode integrated inductor according to claim 1, characterized in that: The adhesive material is epoxy resin.

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