Copper-iron co-fired inductor
By using a copper-iron co-fired inductor structure, the conductor is only exposed at both ends of the sintered magnet, which solves the problems of easy short circuit and large leakage flux of traditional inductors and improves the electromagnetic performance of the inductor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN MENTECH OPTICAL & MAGNETIC CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional molded inductors have problems such as easy short circuits, risk of open circuits, large leakage flux, and incomplete release of the magnetic properties of the magnetic material.
The copper-iron co-fired inductor structure is adopted, with the conductors only exposed at both ends of the sintered magnet, and the interior is completely shielded, reducing the exposure of electrodes and improving electromagnetic characteristics.
This reduces the leakage flux of the inductor and improves its electromagnetic performance.
Smart Images
Figure CN224417607U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inductor technology, and in particular to a copper-iron co-fired inductor. Background Technology
[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.
[0003] Molded inductors are an indispensable component of electronic information and its peripheral devices.
[0004] Traditional molded inductors are made by winding enameled wire into a coil, filling it with powder, molding it, curing it at a low temperature, and then bending the leads to form the shape. Inductors with this structure have disadvantages such as being prone to short circuits, having the risk of open circuits, having large leakage flux, and not being able to fully release the magnetism of the magnetic material. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides a copper-iron co-fired inductor. Through a pre-formed conductor, only the sides and / or bottoms of both ends of the conductor are exposed outside the sintered magnet, while the interior is completely shielded, reducing electrode exposure. This results in a higher electromagnetic characteristic of the inductor, thereby reducing inductor leakage flux and improving inductor performance.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] The first aspect of this utility model provides a copper-iron co-fired inductor, comprising a sintered magnet and a conductor;
[0008] The conductor is an integrally formed structure, including a connecting part and ends respectively connected to both ends of the connecting part. The connecting part of the conductor is disposed in the sintered magnet body, and the two ends of the conductor are exposed outside the sintered magnet body as terminals. The terminals have an electroplated layer to form electrodes. The surface of the sintered magnet body is provided with recesses for accommodating the terminals.
[0009] Furthermore, the conductor is in the shape of a straight line, a Z-shape, or an S-shape, and the sides of both ends of the conductor are exposed outside the two sides of the sintered magnet;
[0010] Furthermore, the connecting part of the conductor is stepped, and at least one end of the conductor is exposed outside the two sides of the sintered magnet. The top surface of one end of the conductor is exposed outside the top surface of the sintered magnet, and the bottom surface of the other end is exposed outside the bottom surface of the sintered magnet.
[0011] Furthermore, the connecting portion of the conductor is U-shaped, M-shaped, or V-shaped, and at least one end face of the conductor is exposed outside both sides of the sintered magnet, while the bottom surfaces of the conductor's two ends are respectively exposed outside the bottom surface of the sintered magnet.
[0012] Furthermore, the conductor connection is in the shape of a straight line, and both ends of the conductor are exposed on the top and bottom surfaces of the sintered magnet.
[0013] Furthermore, the sintered magnet is a cuboid, a square prism, or a cylinder.
[0014] Furthermore, the thickness of the terminal is greater than the depth of the recess.
[0015] Furthermore, the conductor is configured as a plurality of conductors, and the plurality of conductors are arranged in parallel in sequence along the length direction of the sintered magnet.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] The copper-iron co-fired inductor of this invention uses a pre-formed conductor, with only the sides and / or bottoms of both ends of the conductor exposed outside the sintered magnet, and the interior is completely shielded, reducing electrode exposure. This results in higher electromagnetic characteristics for the inductor, thereby reducing inductor leakage flux and improving inductor performance. Attached Figure Description
[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an improper limitation of this utility model.
[0019] Figure 1 A three-dimensional structural diagram of the copper-iron co-fired inductor provided by this utility model;
[0020] Figure 2 A perspective view of the copper-iron co-fired inductor provided by this utility model;
[0021] Figure 3 A cross-sectional view of an inductor provided by this utility model, wherein the bottom surfaces of both ends of the conductor are exposed on the bottom surface of the sintered magnet, and the end faces of both ends are exposed on both sides of the sintered magnet.
[0022] Figure 4 A cross-sectional view of an inductor provided by this utility model, showing that the bottom surfaces of both ends of the conductor are exposed on the bottom surface of the sintered magnet, and the end faces are exposed on both sides of the sintered magnet.
[0023] Figure 5 A cross-sectional schematic diagram of an inductor whose bottom surfaces at both ends of the conductor are exposed on the bottom surface of a sintered magnet, as provided by this utility model.
[0024] Figure 6 A cross-sectional view of the inductance of the M-shaped and V-shaped conductors provided by this utility model;
[0025] Figure 7A cross-sectional view of an inductor provided by this utility model, wherein the end faces of the two ends of the conductor are exposed on the top and bottom surfaces of the sintered magnet, respectively.
[0026] Figure 8 A cross-sectional view of an inductor provided by this utility model, showing the end faces of both ends of the conductor exposed on the top and bottom surfaces of the sintered magnet, respectively.
[0027] Figure 9 A cross-sectional view of an inductor provided by this utility model shows that the end faces of both ends of a conductor are exposed on the top and bottom surfaces of a sintered magnet, and at least one end face of each end is exposed on one side of the sintered magnet.
[0028] Figure 10 The two end faces of another conductor provided by this utility model are exposed on the top and bottom surfaces of the sintered magnet, respectively, and at least one end face of each end face is exposed on one side of the sintered magnet. (Inductor cross-sectional view).
[0029] Figure 11 This is a schematic diagram of an inductor with a cylindrical sintered magnet provided by this utility model. Detailed Implementation
[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0031] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.
[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0033] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various components or elements of this utility model and do not specifically refer to any component or element in this utility model. They should not be construed as limiting this utility model.
[0034] In this utility model, terms such as "fixed connection," "connected," and "joined" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and should not be construed as a limitation of this utility model.
[0035] Where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0036] Example 1
[0037] This embodiment 1 provides a copper-iron co-fired inductor.
[0038] This embodiment provides a copper-iron co-fired inductor, which is mainly used in fields such as AI, servers, computing power, and automotive electronics. It provides an inductor device that can carry large currents and has high efficiency for AI, server power supplies, computing centers, and in-vehicle intelligent driving circuits.
[0039] This embodiment provides a copper-iron co-fired inductor, such as Figure 1 As shown, it includes a conductor 1 (also called a coil) and a sintered magnet 2 covering the conductor.
[0040] Preferably, the sintered magnet 2 can be in the shape of a cuboid, a square prism, or a cylinder.
[0041] Preferably, conductor 1 is a one-piece molded structure, specifically, such as Figure 2 As shown, it has a connecting part 3 and two ends 4, which are respectively connected to the two ends of the connecting part 3. An angle is provided between the two ends 4 of the conductor and the conductor connecting part 3.
[0042] Preferably, when the sintered magnet 2 is a cuboid, the number of conductors 1 can be multiple, and the multiple conductors 1 are arranged in parallel along the length direction of the sintered magnet 2. The spacing between two adjacent conductors 1 can be set to be greater than the conductor thickness.
[0043] In this design, both ends 4 of each conductor 1 are exposed outside the sintered magnet 2, serving as terminals, and each terminal has an electroplated layer forming an electrode. Specifically, the electroplated layers are, in sequence, a copper layer, a nickel layer, and a tin layer.
[0044] Specifically, the end faces 4 at both ends of conductor 1 are exposed outside the two sides of the sintered magnet 2; or, as Figure 2 , Figure 3 and Figure 4 As shown, the bottom surfaces of both ends 4 of the conductor are exposed on the bottom surface of the sintered magnet 2, and at least one end face of both ends 4 is exposed on both sides of the sintered magnet 2; or, as shown... Figure 1 and Figure 5As shown, the end faces of the two ends 4 of the conductor are exposed outside the bottom surface of the sintered magnet 2. At this time, it is not limited whether the two included angles are equal; the connection part 3 of the conductor can be U-shaped, M-shaped, spiral-shaped, or V-shaped, such as... Figure 6 As shown. It should be noted that the surface of the sintered magnet 2 is provided with recesses 5 corresponding to the two ends. The recesses 5 are for accommodating the two ends 4. The two ends 4 of the conductor extend through the sintered magnet to the recesses 5 as terminals. In this embodiment, the thickness of the terminal needs to be higher than the depth of the recess 5 so that the terminal protrudes from the recess 5 so that the subsequent circuit connection of the inductor can be made.
[0045] Example 2
[0046] This embodiment 2 provides a copper-iron co-fired inductor.
[0047] Unlike Example 1, the end faces of the conductor are exposed on the top and bottom surfaces of the sintered magnet, respectively. Figure 7 and Figure 8 As shown; or the top surface of one end of the conductor is exposed to the top surface of the sintered magnet, and the end face of the other end is exposed to the bottom surface of the sintered magnet, with at least one end face exposed to one side of the sintered magnet, such as... Figure 9 and Figure 10 As shown. At this time, the connection of the conductor can be in the form of a straight line, an N-shape, a stepped shape, or an S-shape.
[0048] When the conductor connection is stepped, S-shaped, or N-shaped, the included angle between the connection and the corresponding end can be set to 45°-90°, preferably 90°; when the conductor connection is straight, the included angle between the connection and the corresponding end is 90°-135°.
[0049] Example 3
[0050] This embodiment 3 provides a copper-iron co-fired inductor.
[0051] Unlike Examples 1 and 2, as Figure 11 As shown, the sintered magnet is a cylinder, and the end faces of the conductor are exposed on the top and bottom surfaces of the sintered magnet, respectively. The central axes of the end faces of the conductor, the top surface, and the bottom surface of the sintered magnet coincide. In this case, the connection part of the conductor can be I-shaped, Z-shaped, or C-shaped, and the cross-section of the conductor can be circular, rectangular, pentagonal, or hexagonal. The ratio of the cross-sectional area of the conductor to the effective cross-sectional area of the sintered magnet is 1:N (N is greater than 1).
[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A copper-iron co-fired inductor, characterized in that: Including sintered magnets and conductors; The conductor is an integrally formed structure, including a connecting part and ends respectively connected to both ends of the connecting part. The connecting part of the conductor is disposed in the sintered magnet body, and the two ends of the conductor are exposed outside the sintered magnet body as terminals. The terminals have an electroplated layer to form electrodes. The surface of the sintered magnet body is provided with recesses for accommodating the terminals.
2. The copper-iron co-fired inductor as described in claim 1, characterized in that: The conductor is in the shape of a straight line, a Z-shape, or an S-shape, and the sides of both ends of the conductor are exposed outside the two sides of the sintered magnet.
3. The copper-iron co-fired inductor as described in claim 1, characterized in that: The conductor's connection portion is stepped, and at least one end of the conductor is exposed outside the two sides of the sintered magnet. The top surface of one end of the conductor is exposed outside the top surface of the sintered magnet, and the bottom surface of the other end is exposed outside the bottom surface of the sintered magnet.
4. The copper-iron co-fired inductor as described in claim 1, characterized in that: The connection portion of the conductor is U-shaped, M-shaped, or V-shaped, and at least one end face of the conductor is exposed outside the two sides of the sintered magnet, and the bottom surfaces of the conductor's two ends are respectively exposed outside the bottom surface of the sintered magnet.
5. The copper-iron co-fired inductor as described in claim 1, characterized in that: The conductor connection is in the shape of a straight line, and both ends of the conductor are exposed on the top and bottom surfaces of the sintered magnet.
6. The copper-iron co-fired inductor as described in claim 1, characterized in that: The sintered magnet is a cuboid, square prism, or cylinder.
7. The copper-iron co-fired inductor as described in claim 1, characterized in that: The thickness of the terminal is greater than the depth of the recess.
8. The copper-iron co-fired inductor as described in claim 1, characterized in that: The conductors are configured as multiple conductors, and the multiple conductors are arranged in parallel along the length direction of the sintered magnet.