Combined anti-interference enhanced common mode choke

Abstract

The utility model relates to the technical field of inductors, and discloses a combined anti-interference reinforced common mode inductor, which comprises a magnetic core base, a magnetic cover plate and a coil, the magnetic core base comprises a cylinder, two ends of the cylinder are symmetrically and fixedly connected with fixing plates, the middle part of the cylinder is fixedly connected with two partition plates, the tops of two ends of the fixing plates are symmetrically and fixedly connected with bonding pads I, and the bonding pads II are fixedly connected with the magnetic cover plate. Three second bonding pads are fixedly connected to the top of the partition plate, protruding blocks are fixedly connected to the bottom of the fixing plate and the bottom of the partition plate, and a plurality of clamping grooves matched with the protruding blocks are symmetrically formed in the two sides of the top face of the magnetic cover plate. After a coil is wound on the magnetic core base, dispensing is carried out on the magnetic core base and the magnetic cover plate, then the protruding blocks and the clamping grooves are combined, accurate alignment can be achieved, the situation of sheet tails can be effectively prevented, meanwhile, close combination of a magnetic field and the magnetic effect can be effectively guaranteed, and the assembling quality of the common-mode inductor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a combined anti-interference enhanced common-mode inductor. Background Art

[0002] A common-mode inductor, also called a common-mode choke coil, is used in a circuit to filter common-mode electromagnetic interference signals. That is, when a common-mode current flows through the common-mode inductor, due to the co-directionality of the common-mode current, a co-directional magnetic field will be generated inside the coil. The magnetic fields are superimposed on each other, thereby increasing the inductive reactance of the coil. The coil shows a high impedance and generates a strong damping effect, so as to attenuate the common-mode current and achieve the purpose of filtering. When the normal current in the circuit flows through the common-mode inductor, the current generates reverse magnetic fields in the inductive coils wound in the same phase and cancels each other out, with almost no impedance. Therefore, the normal current can pass through without attenuation.

[0003] At present, when assembling a common-mode inductor on the market, the magnetic core base and the cover plate are usually directly combined by dispensing glue, which is prone to the phenomena of inaccurate assembly positioning and deviation, reducing the quality of the common-mode inductor. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is that when assembling the existing common-mode inductor, there are prone to the phenomena of inaccurate assembly positioning and deviation, reducing the quality of the common-mode inductor assembly.

[0005] To solve the above problems, the technical solution of the utility model is: a combined anti-interference enhanced common-mode inductor, including a magnetic core base, a magnetic cover plate and a coil. The magnetic core base includes a column body. Both ends of the column body are symmetrically and fixedly connected with fixing plates, and two partition plates are fixedly connected to the middle. At the top of both ends of the fixing plate, there are symmetrically fixedly connected with a first pad, and at the top of the partition plate, there are fixedly connected with three second pads. At the bottom of the fixing plate and the partition plate, there are fixedly connected with bumps. On both sides of the top surface of the magnetic cover plate, there are symmetrically opened with a plurality of card slots adapted to the bumps.

[0006] Further, the column body is of a cuboid structure, and the two partition plates divide the outside of the column body into three coil winding areas with the same length.

[0007] Further, there are three groups of coils, which are respectively located in the three coil winding areas and are evenly wound on the outside of the column body.

[0008] Further, the first pad is used for welding the lead-out end of the coil close to the fixing plate side and is also welded to the terminal PCB; the second pad is used for welding the lead-out ends of the adjacent sides of two adjacent coils.

[0009] The advantages of the present utility model compared with the existing technology are as follows: After the coil is wound on the magnetic core base of the present utility model, it is spot-glued to the magnetic cover plate, and then combined through the convex block and the card slot, which can achieve precise alignment, effectively prevent the situation of the end piece, and at the same time can effectively ensure the close combination of the magnetic field and the magnetic effect, improving the quality of the common mode inductor assembly. Brief Description of the Drawings

[0010] Figure 1 is a three-dimensional view of the present utility model.

[0011] Figure 2 is the disassembly of the magnetic core base and the magnetic cover plate of the present utility model Figure 1 .

[0012] Figure 3 is the disassembly of the magnetic core base and the magnetic cover plate of the present utility model Figure 2 .

[0013] Figure 4 is a top view of the magnetic core base of the present utility model.

[0014] Figure 5 is an electrical circuit diagram of the present utility model.

[0015] As shown in the figure: 1. Magnetic core base; 101. Cylinder; 102. Fixed plate; 103. Partition; 104. Pad 1; 105. Pad 2; 106. Convex block; 2. Magnetic cover plate; 201. Card slot; 3. Coil. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Such as Figures 1 to 4As shown in the figure, a combined anti-interference enhanced common mode inductor includes a magnetic core base 1, a magnetic cover plate 2, and a coil 3. The magnetic core base 1 includes a column 101. At both ends of the column 101, fixing plates 102 are symmetrically fixed. In the middle, two partition plates 103 are fixed. At the top of both ends of the fixing plate 102, first pads 104 are symmetrically fixed. At the top of the partition plate 103, three second pads 105 are fixed. The column 101 is of a cuboid structure. The two partition plates 103 divide the outside of the column 101 into three coil winding areas with the same length. There are three groups of coils 3, which are respectively located in the three coil winding areas and are evenly wound around the outside of the column 101. The first pads 104 are used to weld the lead-out ends of the coil 3 close to the fixing plate 102 side and are also welded to the terminal PCB at the same time. The second pads 105 are used to weld the lead-out ends of the adjacent sides of the two adjacent coils 3.

[0018] At the bottom of both the fixing plate 102 and the partition plate 103, bumps 106 are fixed. On both sides of the top surface of the magnetic cover plate 2, a plurality of card slots 201 adapted to the bumps 106 are symmetrically provided.

[0019] In specific use, there are three coil winding areas in the middle of the magnetic core base. At the top of both ends of the fixing plate 102, first pads 104 are symmetrically fixed. After forming, external electroplating is carried out for connection with the terminal PCB by welding. The three wound coils play a strengthening role. At the bottom of both the fixing plate 102 and the partition plate 103, bumps 106 are fixed for assembly with the card slots 201 on the magnetic cover plate 2. After the coil 3 is wound on the magnetic core base 1, glue is applied to the magnetic cover plate 2, and then combined through the bumps 106 and the card slots 201, which can achieve accurate alignment and effectively ensure the close combination of the magnetic field and the magnetic effect.

[0020] The electrical circuit diagram of the combined completed product is as Figure 5 shown.

[0021] The parts not disclosed in the present utility model are all prior arts, and their specific structures and working principles will not be elaborated herein.

[0022] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to this process, method, article or device.

[0023] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

[0024] The above description of the present utility model and its embodiments is not restrictive. What is shown in the drawings is only one of the embodiments of the present utility model, and the actual structure is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments without creative efforts without departing from the purpose of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A combined anti-interference reinforced common mode inductor, comprising a magnetic core base (1), a magnetic cover (2) and a coil (3), characterized in that: The magnetic core base (1) comprises a column (101), the two ends of the column (101) are symmetrically fixed with a fixing plate (102), the middle part is fixed with two partitions (103), the tops of the two ends of the fixing plate (102) are symmetrically fixed with welding pads 1 (104), the tops of the partitions (103) are fixed with three welding pads 2 (105), the bottoms of the fixing plate (102) and the partitions (103) are both fixed with protrusions (106), and the top surface of the magnetic cover (2) is symmetrically provided with a plurality of slots (201) adapted to the protrusions (106) on both sides.

2. The combined anti-interference enhanced common mode inductor according to claim 1, characterized in that: The column (101) is a rectangular parallelepiped structure, and the two partitions (103) divide the outer side of the column (101) into three coil winding areas of the same length.

3. The combined anti-interference enhanced common mode inductor according to claim 2, characterized in that: The coils (3) are provided in three groups and are respectively located in three coil winding areas and are evenly wound around the outside of the column (101).

4. The combined anti-interference enhanced common mode inductor according to claim 1, characterized in that: The soldering pad 1 (104) is used to solder the lead-out end of the coil (3) close to the fixing plate (102) and is soldered to the terminal PCB at the same time; the soldering pad 2 (105) is used to solder the lead-out ends of two adjacent coils (3) close to each other.

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