Double integrated inductor

Abstract

The utility model discloses a double integrated inductor, which is formed by combining a preformed copper screw sleeve group, two copper sheet windings and a magnetic core, the copper screw sleeve group consists of a seat body part and a cover cap, and a vertical upright post is arranged in the center of a base of the seat body part; the magnetic core is a rectangular block formed by die casting and is provided with two through holes separated at intervals, each copper sheet winding is a semi-surrounding body formed by bending a copper sheet and sleeved with the magnetic core, a through hole is formed in the center of the top of each copper sheet winding, the stand column is inserted into the through holes and the through holes from bottom to top, and the cap is fixed to the top end of the stand column in a screwed mode and presses against the copper sheet windings. When the inductor structure is applied to a high-efficiency power supply module, the effect of suppressing EMI can be improved through the copper sheet winding, and generated heat can be transferred and quickly dissipated through the PCB when large current passes through the double inductors, so that the conversion efficiency of the whole circuit can be improved.

Description

Technical Field

[0001] The utility model relates to an inductor device, in particular to a dual integrated inductor with enhanced EMI suppression and good heat dissipation, belonging to the technical field of basic electronic components. Background Art

[0002] An inductor is one of the most commonly used components in electronic devices and is widely used in various circuits, where it can perform functions such as filtering, energy storage, matching, and resonance. With the increasing miniaturization, portability, and high-density component assembly of electronic products, inductor components have developed rapidly; and considering electromagnetic compatibility, the electromagnetic interference resistance of electronic products has become a basic design requirement, thus increasing the demand and application of inductors.

[0003] Inductor devices are widely used in DC-DC Converter Buck circuits and play a crucial role in the conversion efficiency of this circuit, restricting the development of big data processing hardware devices to a certain extent. Summary of the Invention

[0004] In view of the above-mentioned defects existing in the prior art, the purpose of the present utility model is to propose a dual integrated inductor, aiming to improve the conversion efficiency of the DC voltage drop circuit.

[0005] The technical solution adopted by the present utility model to achieve the above purpose is: a dual integrated inductor, which is formed by combining a preformed copper screw sleeve set, two copper sheet windings, and a magnetic core. The copper screw sleeve set consists of a seat part and a cap, and a vertically erected column is provided at the center of the base of the seat part; the magnetic core is a die-cast rectangular block with two perforations separated at intervals. Each copper sheet winding is a semi-enclosure formed by bending a copper sheet and sleeving the magnetic core, and a through hole is provided at the center of the top. The column is inserted into the perforation and the through hole from bottom to top, and the cap is screwed and fixed to the top of the column and presses against the copper sheet winding.

[0006] Further, the inner wall of the through hole opened in the copper sheet winding has a stepped variable diameter, and the first inner diameter of the through hole close to the magnetic core is suitable for the column to pass through and is smaller than the outer diameter of the cap, and the second inner diameter of the through hole far from the magnetic core is suitable for the cap to fit therein.

[0007] Further, the two ends of the copper sheet winding are formed into pins electrically connected to the PCB board, and the bottom side of the seat part is in direct physical contact with the PCB board.

[0008] Further, the two copper sheet windings are assembled at intervals, and the magnetic core is provided with a groove for increasing the heat dissipation area between the two copper sheet windings.

[0009] Further, the base area of the seat part is close to and smaller than the projected area of the magnetic core relative to the PCB board.

[0010] Further, an insulating coating is provided on the surface of the copper sheet winding.

[0011] Compared with the prior art, the advantages of applying the dual integrated inductor of the present utility model are as follows: by using the copper screw sleeve group to penetrate through the height direction of the inductor and its bottom and directly physically contact the PCB board, the heat generated by the inductor under large current operation can be quickly dissipated, and this temperature control structure is beneficial to improving the conversion efficiency of the DC transformer circuit; at the same time, the assembled shape of the copper sheet winding is beneficial to exert its role in suppressing EMI, further improving the operating environment of the circuit, and promoting the development of the hardware performance of AI servers / data centers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the assembled structure of the dual integrated inductor of the present utility model.

[0013] Figure 2 is Figure 1 a partial cross-sectional schematic diagram of the dual integrated inductor shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0015] In order to improve the conversion efficiency of the DC voltage drop circuit, the present utility model proposes a dual integrated inductor. As shown in Figure 1 and Figure 2 shown, the inductor is formed by combining a preformed copper screw sleeve group 1, two copper sheet windings 2, and a magnetic core 3. The copper screw sleeve group 1 is composed of a seat body part 11 and a cap 12, and a vertically erected column 111 is provided at the center of the base of the seat body part 11. The copper screw sleeve group is not used as a conductive setting in the actual device and circuit. Even though it is in direct physical contact with the copper sheet winding during the assembly process, the insulation characteristics between them are still maintained. The magnetic core is a die-cast rectangular block. To meet the integration of dual inductors, its shape can be regarded as a rectangle formed by splicing two cubes, and a through hole 31 that penetrates the top and bottom is provided at the central axis of each cube, and the two through holes are separated at intervals. Each of the copper sheet windings 2 is a semi-enclosed body formed by bending a copper sheet and sleeving the magnetic core (one cube), and a through hole 21 coaxial with the through hole 31 is provided at the center of the top. On the basis of this preformed structure, the above copper sheet winding is wrapped on the surface of the magnetic core and the two holes are aligned, and then the above column 111 is inserted into the through hole 31 and the through hole 21 from bottom to top, and the cap 12 is screwed and fixed to the top of the column 111, playing a certain pressing and locking role on the copper sheet winding.

[0016] However, the main function of the copper screw set of the dual integrated inductor of the present application is designed to transfer heat through a good conductor of heat energy to facilitate heat dissipation. That is, the bottom side of the seat body is directly in physical contact with the PCB board, and the top of the cap is exposed outward.

[0017] As Figure 2 described above, in order to realize the limiting function of the cap on the copper sheet winding, the through hole opened in the copper sheet winding has an inner wall with a stepped variable diameter, and the first inner diameter of the through hole close to the magnetic core 3 is suitable for the column 111 to pass through and is smaller than the outer diameter of the cap 12, and the second inner diameter of the through hole far from the magnetic core is suitable for the cap 12 to be accommodated therein.

[0018] From a further refined feature perspective, both ends of the above-mentioned copper sheet winding 2 are formed into pins electrically connected to the PCB board. Since the bearing pad of the copper screw set is high, the pins are slightly higher than the surface of the PCB board here, so wire bonding or wire drawing welding is usually selected to complete the circuit assembly of the inductor device. Moreover, in order to maintain the insulation between the copper sheet winding and the cap, an insulating coating is sprayed on the surfaces of both copper sheet windings. As can be seen from the figure, the two copper sheet windings are assembled at intervals, and the magnetic core 3 is provided with a groove for increasing the heat dissipation area between the two copper sheet windings.

[0019] In addition, as a preferred implementation for improving the heat exchange efficiency, the base area of the above-mentioned seat body is close to and smaller than the projected area of the magnetic core relative to the PCB board.

[0020] On the other hand, the magnetic core in the inductor is an integrally formed casting. From the optional forming processes, the magnetic core can be made of one or a mixture of two or more of iron powder / FeSi / FeSiCr / FeSiAl / FeNi / amorphous / nanocrystalline in a prefabricated mold by cold pressing or hot pressing and baking and curing to form a cuboid shape. The forming pressure is between 8 - 10 T / cm², and baking and curing is carried out at 160 - 180 °C for 2 - 4 hours; it can also be made of one or a mixture of two or more of FeSi / FeNi / FeSiAl / amorphous / nanocrystalline, combined with silicone resin or silicone rubber resin for high-temperature sintering, and then annealed at a temperature of 250 - 850 °C for 1 - 2 hours under nitrogen protection. Of course, the magnetic core can also be formed by die-casting of low-loss high-frequency high-saturation manganese-zinc ferrite powder, and the process parameters are omitted.

[0021] In summary, as described in detail in the preferred embodiment of the dual integrated inductor of the present utility model, compared with the prior art, it has substantial features and progressiveness, and its technical effects are as follows: By using a copper screw sleeve group to penetrate through the height direction of the inductor and its bottom to directly physically contact the PCB board, the heat generated by the inductor during high-current operation can be quickly dissipated. This temperature control structure is beneficial to improving the conversion efficiency of the DC transformer circuit; at the same time, the assembled shape of the copper sheet winding is beneficial to exert its role in suppressing EMI, further improving the operating environment of the circuit, and promoting the development of the hardware performance of AI servers / data centers.

[0022] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dual integrated inductor, characterized in that: The inductor is formed by a preformed copper screw set, two copper sheet windings, and a magnetic core, wherein the copper screw set consists of a seat body and a cap, and a vertical upright column is provided at the center of the base of the seat body; the magnetic core is a die-cast rectangular block and is provided with two through holes separated at intervals, each of the copper sheet windings is a semi-enclosed body formed by bending a copper sheet and fitting the magnetic core, and a through hole is provided in the center of the top, the column is inserted into the through hole and the through hole from bottom to top, and the cap is screwed and fixed to the top of the column and pressed against the copper sheet winding.

2. The dual integrated inductor according to claim 1, characterized in that: The through hole formed by the copper sheet winding has an inner wall with stepped diameter variation, and the first inner diameter of the through hole close to the magnetic core is suitable for the column to pass through and is smaller than the outer diameter of the cap, and the second inner diameter of the through hole away from the magnetic core is suitable for the cap to fit therein.

3. The dual integrated inductor according to claim 1, characterized in that: The two ends of the copper sheet winding are formed into pins electrically connected to the PCB board, and the bottom side of the seat body is in direct physical contact with the PCB board.

4. The dual integrated inductor according to claim 1, characterized in that: The two copper sheet windings are installed at intervals from each other, and the magnetic core is provided with a groove between the two copper sheet windings to increase the heat dissipation area.

5. The dual integrated inductor according to claim 1, characterized in that: The base area of ​​the seat body is close to and smaller than the projection area of ​​the magnetic core relative to the PCB board.

6. The dual integrated inductor according to claim 1, characterized in that: The surface of the copper sheet winding is provided with an insulating coating.

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