Direct-current common-mode inductor

Abstract

The utility model relates to a direct-current common-mode inductor which comprises a base, a magnetic core, a winding and a baffle. Two bosses are arranged on the base, grooves are formed in the opposite sides of the two bosses, the two grooves are opposite to each other to form a space matched with the partial structure of the magnetic core, and the magnetic core is installed in the two grooves; the cross section of the magnetic core is circular or elliptical; two windings are wound outside the magnetic core, a coil outlet pin is flattened, and a wiring hole is formed in the coil outlet pin; a plurality of mounting holes are formed in the base, and the direct-current common-mode inductor is fixed in the machine body through the mounting holes; the baffles are installed on bosses on the two sides of the winding and make contact with the winding, and the winding is limited on the magnetic core. The base and the magnetic core, the magnetic core and the winding, and the boss and the baffle are bonded through fixing glue. According to the utility model, the technical problems that the traditional onboard direct-current common-mode inductor occupies a large area of a PCB (Printed Circuit Board) and is unstable to install are solved.

Description

Technical Field

[0001] This application belongs to the technical field of inductive components, and particularly relates to a DC common-mode inductor. Background Art

[0002] In electronic devices, a DC common-mode inductor is a commonly used component, usually used to suppress common-mode noise and improve signal quality. Traditional DC common-mode inductors usually adopt a board-mounted design, passing the pins of the inductor through the openings of the PCB board and fixing them with solder. Although this design can achieve the function of the common-mode inductor, there are some obvious deficiencies.

[0003] First of all, traditional board-mounted common-mode inductors require a large PCB board area. This is a significant disadvantage for circuit designs with limited space. In addition, during the installation process, the product pins are prone to skew or be in an inwards V shape, increasing the installation difficulty. To ensure firm installation, secondary fixing is required through the reflow soldering process, which not only increases the complexity of the operation but also reduces production efficiency. Utility Model Content

[0004] In view of the deficiencies in the related art, the present utility model provides a DC common-mode inductor, which solves the technical problems of large PCB board area occupation and unstable installation of traditional board-mounted DC common-mode inductors.

[0005] In a possible implementation, a DC common-mode inductor is provided, including: a base, a magnetic core, windings, and baffles; two bosses are provided on the base, and both sides of the two bosses facing each other have grooves. The cross-sections of the two grooves are arc-shaped, and the grooves of the two bosses face each other to form a space that matches the partial structure of the magnetic core. The magnetic core is installed in the grooves of the two bosses; the cross-section of the magnetic core is circular or elliptical; two windings are wound around the magnetic core, and the coils of the windings are wound with enameled flat copper wires. The lead-out pins of the coils are flattened, and wiring holes are provided on the lead-out pins of the coils. The two windings are wound on different sections of the magnetic core; a plurality of mounting holes are also provided on the base, and the DC common-mode inductor is fixed in the machine body through the mounting holes; the baffles are installed on the bosses on both sides of the windings and are in contact with the windings, and the two baffles limit the windings on the magnetic core; the base and the magnetic core are bonded with fixing glue, the magnetic core and the windings are bonded with fixing glue, and the bosses and the baffles are bonded with fixing glue.

[0006] In a possible implementation, the windings are wound into a cross-section of a ring shape.

[0007] In a possible implementation, the magnetic core is made of nanocrystalline material.

[0008] In a possible implementation, the coils of the windings are flat copper wires with a thickness of 5 mm.

[0009] In a possible implementation, the thickness of the flattened coil lead pin is 4 mm.

[0010] In a possible implementation, the base is made by an injection molding process and is a high-temperature resistant plastic material.

[0011] In a possible implementation, the surface of the baffle is subjected to anti-corrosion treatment.

[0012] Based on the above technical solutions, for the DC common mode inductor of the present utility model, by installing the magnetic core in the convex groove of the base and using a fixing adhesive to bond the base, magnetic core, winding and baffle together, the magnetic core and winding are effectively limited in a fixed space, ensuring the structural stability and performance reliability of the inductor; two semi-circular convex platforms are provided on the base for limiting and fixing the magnetic core; with this arrangement, the DC common mode inductor can be directly installed inside the machine body without occupying the area of the PCB board; multiple mounting holes are designed on the base, which enables the product to be directly installed inside the device by screws or other fixing means instead of on the traditional PCB board, simplifying the installation process and improving the installation firmness and reliability; the baffle is installed on the convex platforms on both sides of the winding and contacts the winding, playing a role in fixing the winding on the magnetic core, preventing the winding from falling off and enhancing the reliability of the product. Description of the Drawings

[0013] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0014] Figure 1 is a schematic structural diagram of a DC common mode inductor according to an embodiment of the present utility model;

[0015] Figure 2 is a schematic structural diagram of the base of a DC common mode inductor according to another embodiment of the present utility model.

[0016] In the figure:

[0017] 1. Base; 2. Magnetic core; 4. Baffle; 6. Convex platform; 7. Groove; 8. Winding; 9. Coil lead pin; 10. Mounting hole; 11. Wiring hole. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0020] The terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features.

[0021] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] In order to solve the technical problems that the traditional on-board DC common mode inductor occupies a large area of the PCB board and is unstable in installation, the present application proposes a DC common mode inductor.

[0023] See Figure 1 and Figure 2 , in a possible implementation manner, the DC common mode inductor includes a base 1, a magnetic core 2, windings 8, and a baffle 4; two bosses 6 are provided on the base 1, and grooves 7 are provided on one side of the two bosses 6 facing each other. The cross-sections of the two grooves 7 are arc-shaped, and the grooves 7 of the two bosses 6 face each other to form a space matching part of the structure of the magnetic core 2, and the magnetic core 2 is installed in the grooves 7 of the two bosses 6; the cross-section of the magnetic core 2 is circular or elliptical; two windings 8 are wound around the outside of the magnetic core 2. The windings 8 are wound with enameled flat copper wires, the coil lead pins 9 are flattened, and wiring holes 11 are provided on the pins. The two windings 8 are wound on different sections of the magnetic core 2; a plurality of mounting holes 10 are also provided on the base 1 for fixing the DC common mode inductor in the machine body; the baffle 4 is installed on the bosses 6 on both sides of the windings 8 and contacts the windings 8, and the two baffles 4 limit the windings (8) on the magnetic core 2; the base 1 and the magnetic core 2 are bonded with a fixing glue, the magnetic core 2 and the windings 8 are bonded with a fixing glue, and the bosses 6 and the baffle 4 are bonded with a fixing glue.

[0024] In this embodiment, the magnetic core 2 of the DC common-mode inductor is fixed on the base 1 through the groove 7 of the boss 6. The winding 8 is wound around different sections of the magnetic core 2, which can effectively suppress the common-mode interference in the DC current. The winding 8 made of enameled flat copper wire can increase the filling density of the coil and improve the efficiency of the inductor. By providing mounting holes 10 on the base 1, the inductor can be stably installed inside the machine body, and the baffle 4 further fixes the positions of the magnetic core 2 and the winding 8 to prevent the winding 8 from falling off the magnetic core 2.

[0025] See Figure 2 , in the above solution, the base 1 can be an injection-molded plate, and two semi-circular bosses 6 are provided on the base 1 for limiting and fixing the magnetic core 2. The user can fix it through the four mounting holes 10 on the base 1. The DC common-mode inductor can be directly installed inside the machine body without occupying the area of the PCB board, simplifying the installation process and saving installation space.

[0026] The magnetic core 2 can be a nanocrystalline magnetic core, and the outside is a protective shell, which can protect the internal magnetic core.

[0027] The coil of the winding 8 is made of enameled flat copper wire and is directly wound around the magnetic ring / magnetic core 2 by a winding machine. The four coil lead pins 9 are flattened and punched by the machine to form wiring holes 11. The 5-mm-thick copper wire is flattened to 4 mm, increasing the contact area for user installation. The baffle 4 plays a fixing role, holding the two windings 8 to prevent them from falling. The magnetic core, winding / coil, base, and baffle are all fixed by fixing glue. The DC common-mode inductor structure of the present utility model is novel and simple, avoiding occupying the user's PCB board. The user's operation of installing and connecting the product is simple, improving production efficiency.

[0028] Wiring holes 11 are provided on the coil lead pins 9 to facilitate a firm electrical connection between the inductor and the external circuit. The wiring holes 11 can be used to insert or fix connection devices such as screws, bolts, or welding points, thereby ensuring that the coil lead pins 9 can be stably fixed in a predetermined position. In this way, current can be transmitted from the winding 8 through the coil lead pins 9 to the external circuit while ensuring the reliability and stability of the electrical connection.

[0029] The design of the DC common-mode inductor in this embodiment improves the structural stability and anti-interference ability of the inductor. The use of enameled flat copper wire makes the coils more closely arranged, thus improving the inductor performance. The mounting holes 10 on the base 1 make the installation of the inductor more convenient, and the use of fixing glue ensures a firm connection between the components. Through the design of the baffle 4, the fixing effect of the magnetic core 2 and the winding 8 is further enhanced, preventing their loosening or displacement during operation, thereby extending the service life of the inductor.

[0030] In another embodiment, the base 1 can be made of other high-strength materials, such as metal or ceramic, to adapt to more demanding working environments; the cross-sectional shape of the groove 7 can also be adjusted according to the shape of the magnetic core 2, such as being rectangular or polygonal, to accommodate different specifications of magnetic cores; the winding 8 can be made of other types of wires, such as stranded wires, to improve its flexibility and tensile properties; the material of the baffle 4 can also be replaced according to the use environment, for example, using plastics or composite materials with higher heat resistance to enhance its protection ability.

[0031] In a possible embodiment, the winding 8 is wound into a ring-shaped cross-section.

[0032] In this embodiment, the winding 8 is wound into a ring-shaped cross-section, ensuring that the current distribution in the winding is more uniform, reducing the influence of the skin effect, and thus improving the efficiency and performance of the inductor.

[0033] The design of the winding 8 with a ring-shaped cross-section can effectively reduce eddy current losses, improve the working efficiency of the inductor, and at the same time can reduce the volume of the winding, making the overall size of the inductor more compact.

[0034] In other embodiments, the cross-section of the winding 8 can also be elliptical or other special-shaped cross-sections to optimize the electrical performance and mechanical strength of the inductor. This deformation can adapt to different application requirements, such as higher current-carrying capacity or better heat dissipation performance.

[0035] In a possible embodiment, the magnetic core 2 is made of nanocrystalline material.

[0036] In this embodiment, the magnetic core 2 made of nanocrystalline material has a high magnetic permeability and low losses, and can provide better magnetic properties in a high-frequency environment, thus improving the overall performance of the inductor.

[0037] The magnetic core 2 made of nanocrystalline material can significantly improve the performance of the inductor, especially in high-frequency applications, with lower iron losses and higher magnetic permeability, which can more effectively suppress high-frequency noise and at the same time reduce the heat generation of the inductor.

[0038] In other embodiments, the magnetic core 2 can be made of ferrite, alloy or other high-performance materials to adapt to different application requirements and cost requirements; the selection of these materials can be adjusted according to the working frequency, temperature conditions and magnetic performance requirements of the inductor.

[0039] In a possible embodiment, the coil diameter of the winding 8 is 5 mm, or it is a flat copper wire with a thickness of 5 mm.

[0040] In this embodiment, the coil diameter of the winding 8 is 5 mm or it is made of flat copper wire with a thickness of 5 mm. This size selection can reduce the resistance and skin effect of the wire while ensuring the performance of the inductor, thereby optimizing the working efficiency of the inductor.

[0041] Selecting a coil diameter of 5 mm can improve the mechanical strength of the winding, ensure the stable transmission of current, reduce the risk of overheating and increased resistance caused by too small a diameter, and thus enhance the overall performance and durability of the inductor.

[0042] In a possible embodiment, the thickness of the flattened coil lead pin 9 is 4 mm.

[0043] In this embodiment, the coil lead pin 9 is flattened into a square with a side length of 4 mm, increasing the contact area between the pin and other components, thereby improving the stability and reliability of the electrical connection.

[0044] By flattening the coil lead pin 9, it is convenient for wiring, reduces the contact resistance, improves the firmness of welding or connection, reduces the risk of electrical faults, and helps with heat dissipation.

[0045] In other embodiments, the coil lead pin 9 can be flattened into other shapes, such as a rectangle or an ellipse, to adapt to different connection methods and space requirements; in addition, the size of the lead pin can also be adjusted according to the needs of the welding or plugging process.

[0046] In a possible embodiment, the base 1 is made by an injection molding process and is a high-temperature resistant plastic material.

[0047] In this embodiment, the base 1 is manufactured by an injection molding process and a high-temperature resistant plastic material is selected, ensuring the shape stability and electrical insulation performance of the base under high-temperature conditions.

[0048] Using the injection molding process to manufacture the base 1 can achieve the integral molding of complex structures, reduce processing costs and improve production efficiency; selecting a high-temperature resistant plastic material can ensure that the base does not deform or age in a high-temperature environment, thereby extending the service life of the inductor.

[0049] In other embodiments, the base 1 can use other molding processes such as die casting or 3D printing, or select different materials such as high-strength ceramics or metal matrix composites to meet the requirements of special application scenarios.

[0050] In a possible embodiment, the baffle 4 is made of a metal material and its surface is treated against corrosion.

[0051] In this embodiment, the baffle 4 is made of a metal material and is corrosion-proof treated, so as to ensure that the baffle is not affected by environmental factors during use and maintain its strength and protection ability.

[0052] The baffle 4 made of a metal material and subjected to corrosion-proof treatment can provide better mechanical strength and protection effect in a harsh environment.

[0053] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and the key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0054] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present application or perform equivalent replacements on some technical features; without departing from the spirit of the technical solutions of the present application, they should all be covered within the scope of the technical solutions claimed in the present application.

Claims

1. A DC common mode inductor, characterized in that: include: A base (1), a magnetic core (2), a winding (8) and a baffle (4); Two bosses (6) are provided on the base (1), and opposite sides of the two bosses (6) are provided with grooves (7), and the two grooves (7) have arc-shaped cross-sections. The grooves (7) of the two bosses (6) are relatively formed to form a space matching the partial structure of the magnetic core (2), and the magnetic core (2) is installed in the grooves (7) of the two bosses (6); The cross section of the magnetic core (2) is a circular ring or an elliptical ring; Two windings (8) are wound around the magnetic core (2), the coils of the windings (8) are wound with enameled flat copper wires, the coil outlet pins (9) are flattened, and wiring holes (11) are provided on the coil outlet pins (9), and the two windings (8) are wound on different sections of the magnetic core (2); The base (1) is also provided with a plurality of mounting holes (10), and the DC common mode inductor is fixed in the body through the mounting holes (10); The baffles (4) are mounted on the bosses (6) on both sides of the winding (8) and are in contact with the winding (8). The baffles (4) on both sides limit the winding (8) on the magnetic core (2); The base (1) and the magnetic core (2) are bonded together by a fixing glue, the magnetic core (2) and the winding (8) are bonded together by a fixing glue, and the boss (6) and the baffle (4) are bonded together by a fixing glue.

2. The DC common mode inductor according to claim 1, characterized in that: The winding (8) is wound into a ring-shaped cross section.

3. The DC common mode inductor according to claim 2, characterized in that: The magnetic core (2) is made of nanocrystalline material.

4. The DC common mode inductor according to claim 3, characterized in that: The coil of the winding (8) is a flat copper wire with a thickness of 5 mm.

5. The DC common mode inductor according to claim 4, characterized in that: The flattened thickness of the coil lead pin (9) is 4 mm.

6. The DC common mode inductor according to claim 5, characterized in that: The base (1) is made of high temperature resistant plastic material by injection molding process.

7. The DC common mode inductor according to claim 6, characterized in that: The baffle (4) has a surface that is treated for corrosion resistance.

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