Inductor

Abstract

The inductor comprises a framework, a first magnetic core, a second magnetic core, a first copper sheet, a second copper sheet, a first terminal and a second terminal, the first terminal is electrically connected to the end of the first copper sheet, and the second terminal is electrically connected to the end of the second copper sheet. The first copper sheet and the second copper sheet are sleeved on the framework in a mutually laminated manner, the framework is arranged between the first magnetic core and the second magnetic core, and the first magnetic core and the second magnetic core are fixedly connected with each other; wherein the first copper sheet and the second copper sheet are each of a spiral structure, and projections of the first copper sheet and the second copper sheet which are arranged in a stacked mode are not completely overlapped and jointly form an alpha winding structure. According to the inductor disclosed by the invention, the size of the inductor is effectively reduced, miniaturization is realized, a higher inductance value can be obtained under the same size, and the application requirements of high frequency and large current are met.

Description

Technical Field

[0001] The present invention relates to the technical field of inductors, and in particular to an inductor. Background Art

[0002] Conventional inductors are usually made of copper wire wound into coils, and their inductance, DC resistance (DCR), magnetic properties and other factors all depend on the number of turns and geometric structure of the winding. In high-frequency applications, factors such as the loss of the inductor coil and the distribution of the magnetic field will affect the performance. Therefore, it is necessary to design an inductor that can effectively improve the performance in high-frequency, high-current and miniaturized applications.

[0003] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes an inductor, which not only effectively reduces the volume of the inductor and realizes miniaturization, but also can obtain a higher inductance value under the same volume to meet the application requirements of high frequency and large current.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention discloses an inductor, comprising a skeleton, a first magnetic core, a second magnetic core, a first copper sheet, a second copper sheet, a first terminal and a second terminal, wherein the first terminal is electrically connected to the end of the first copper sheet, the second terminal is electrically connected to the end of the second copper sheet, the first copper sheet and the second copper sheet are mutually stacked and sleeved on the skeleton, the skeleton is arranged between the first magnetic core and the second magnetic core, and the first magnetic core and the second magnetic core are mutually fixedly connected; wherein the first copper sheet and the second copper sheet are respectively spiral structures, and the projections of the mutually stacked first copper sheet and the second copper sheet do not completely overlap and together form an alpha winding structure.

[0007] Preferably, the widths of the inner circles of the first copper sheet and the second copper sheet are respectively smaller than the widths of their respective outer circles.

[0008] Preferably, the widths of the first copper sheet and the second copper sheet gradually increase from the inner circle to the outer circle.

[0009] Preferably, the structures of the first copper sheet and the second copper sheet are completely the same, wherein the same side of the first copper sheet and the second copper sheet are close to each other and staggered and stacked to form mutually staggered projections.

[0010] Preferably, surfaces of the first copper sheet and the second copper sheet are respectively subjected to metallization treatment or plating treatment.

[0011] Preferably, the first copper sheet comprises a plurality of first sub-copper sheets, which are stacked on each other to form the first copper sheet, wherein each of the first sub-copper sheets is a spiral structure; and / or, the second copper sheet comprises a plurality of second sub-copper sheets, which are stacked on each other to form the second copper sheet, wherein each of the second sub-copper sheets is a spiral structure.

[0012] Preferably, it also includes a first insulating sheet and a second insulating sheet, which are respectively sleeved on the frame, wherein the first insulating sheet is arranged between the first copper sheet and the first magnetic core, and the second insulating sheet is arranged between the second copper sheet and the second magnetic core.

[0013] Preferably, the inductor further includes a third insulating sheet, wherein the third insulating sheet is sleeved on the frame and disposed between the first copper sheet and the second copper sheet.

[0014] Preferably, the inductor further includes an air gap sheet, and the air gap sheet is fixedly connected between the first magnetic core and the second magnetic core.

[0015] Preferably, the skeleton is a circular column structure, and the first copper sheet and the second copper sheet are respectively sleeved on the outer wall surface of the circular column structure; a first protrusion is provided on the side of the first magnetic core close to the second magnetic core, and a second protrusion is provided on the side of the second magnetic core close to the first magnetic core, and the two ends of the circular column structure are respectively sleeved on the first protrusion and the second protrusion.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: in the inductor proposed by the present invention, the two copper sheets are respectively arranged into a spiral structure, and the stacked projections of the two copper sheets are interlaced with each other and together form an alpha winding structure. On the one hand, the total number of turns and area of ​​the copper sheets are maximized in the same space, and at the same time, the total thickness of the inductor is reduced by stacking the copper sheets, thereby effectively reducing the volume of the inductor, achieving miniaturization, and being suitable for application scenarios with limited space; and because the thickness is reduced, the skin effect of the inductor is also reduced, thereby improving energy conversion; on the other hand, a higher inductance value can be obtained under the same volume to meet the application requirements of high frequency and large current.

[0017] In a further embodiment, the present invention also has the following beneficial effects:

[0018] (1) The copper sheet is larger on the outside and smaller on the inside, which makes the DCR distribution of the inductor more uniform, and has good heat dissipation performance, thereby increasing the life of the inductor.

[0019] (2) The surfaces of the first copper sheet and the second copper sheet are respectively metallized or plated, which can further optimize the current transmission efficiency and electromagnetic compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of an inductor disclosed in a preferred embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the inductor;

[0022] Figure 3 yes Figure 1 Schematic diagram of the cross section of the inductor;

[0023] Figure 4 yes Figure 2 Top view of the first copper sheet when stacked;

[0024] Figure 5 yes Figure 2 Top view of the second copper sheet when it is stacked;

[0025] Figure 6 yes Figure 4 The first copper sheet and Figure 5 Schematic diagram of the stacking of the second copper sheet;.

[0026] Description of Figure Numbers:

[0027] 10. Skeleton; 21. First magnetic core; 211. First protrusion; 22. Second magnetic core; 222. Second protrusion; 31. First copper sheet; 32. Second copper sheet; 41. First terminal; 42. Second terminal; 51. First insulating sheet; 52. Second insulating sheet; 53. Third insulating sheet; 61. First air gap sheet; 62. Second air gap sheet. DETAILED DESCRIPTION

[0028] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.

[0029] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit / signal communication.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] like Figures 1 to 3 As shown, a preferred embodiment of the present invention discloses an inductor, including a skeleton 10, a first magnetic core 21, a second magnetic core 22, a first copper sheet 31, a second copper sheet 32, a first terminal 41 and a second terminal 42, wherein the first terminal 41 is electrically connected to the end of the first copper sheet 31, and the second terminal 42 is electrically connected to the end of the second copper sheet 31, the first copper sheet 31 and the second copper sheet 32 ​​are mutually stacked and sleeved on the skeleton 10, the skeleton 10 is arranged between the first magnetic core 21 and the second magnetic core 22, and the first magnetic core 21 and the second magnetic core 22 are fixedly connected to each other; wherein the first copper sheet 31 and the second copper sheet 32 ​​are respectively spiral structures, and the projections of the mutually stacked first copper sheet 31 and the second copper sheet 32 ​​do not completely overlap and together constitute an alpha winding structure.

[0033] In the inductor disclosed in the preferred embodiment of the present invention, two copper sheets are respectively arranged in a spiral structure, and the stacked projections of the two copper sheets are interlaced to form an alpha winding structure. This structure can not only improve the inductance value of the inductor, but also effectively reduce parasitic capacitance, reduce DC resistance, optimize thermal management, reduce skin effect, and improve energy utilization efficiency, ultimately effectively improving the performance of the inductor in high-frequency, high-current and miniaturized applications.

[0034] Moreover, the use of alpha winding has the following effects on inductors: (1) Optimizing the inductor structure: The alpha winding method can optimize the inductor structure of the copper sheet by precisely controlling the shape and parameters of the winding; this optimization enables the copper sheet to generate a stronger magnetic field when power is applied, thereby improving the inductance. (2) Reducing energy loss: The efficient alpha winding technology can reduce the energy loss during the winding process, allowing more energy to be used to generate the magnetic field, thereby improving the inductance. (3) Improving stability: The alpha winding method improves the stability of the copper sheet and reduces performance fluctuations caused by environmental changes or improper operation; this stability ensures that the copper sheet can maintain a high inductance under different conditions.

[0035] Among them, Figure 4 and Figure 5 As shown, the width of the inner circle of the first copper sheet 31 and the second copper sheet 32 ​​is smaller than the width of the outer circle, which can improve the uniformity of the DCR of the inductor; for example Figure 4 and Figure 5 The width at A is smaller than the width at B, and the width at C is smaller than the width at D. In other embodiments, the widths of the first copper sheet 31 and the second copper sheet 32 ​​may be gradually increased from the inner circle to the outer circle, further making the DCR of the inductor more stable and uniform.

[0036] Refer to Figure 4 and Figure 5 In this embodiment, the structures of the first copper sheet 31 and the second copper sheet 32 ​​are completely the same, wherein the first side surface of the first copper sheet 31 is close to the first side surface of the second copper sheet 32 ​​for stacking. Figure 6 As shown, the same side of the first copper sheet 31 and the second copper sheet 32 ​​are close to each other for stacking. Since the first copper sheet 31 and the second copper sheet 32 ​​are spiral structures, although the structures of the two are exactly the same, because the same side is close to each other for stacking, the projections of the first copper sheet 31 and the second copper sheet 32 ​​stacked on each other do not completely overlap. Among them, using two completely identical copper sheets can also be more convenient to generate.

[0037] The surfaces of the first copper sheet 31 and the second copper sheet 32 ​​are respectively metallized or plated, which can further optimize the current transmission efficiency and electromagnetic compatibility.

[0038] In this embodiment, the inductor also includes a first insulating sheet 51, a second insulating sheet 52 and a third insulating sheet 53, which are respectively sleeved on the skeleton 10, wherein the first insulating sheet 51 is arranged between the first copper sheet 31 and the first magnetic core 21, the second insulating sheet 52 is arranged between the second copper sheet 32 ​​and the second magnetic core 22, and the third insulating sheet 53 is arranged between the first copper sheet 31 and the second copper sheet 32, wherein a hole 531 larger than the cross-section of the skeleton 10 is provided in the middle of the third insulating sheet 53, so that the first copper sheet 31 and the second copper sheet 32 ​​can be partially contacted through the redundant hole to form a coil structure.

[0039] As required, the inductor may further include a first air gap 61 and a second air gap 62 , which are respectively fixedly connected between the first magnetic core 31 and the second magnetic core 32 , and are respectively arranged at two sides.

[0040] Refer to Figure 3 In this embodiment, the skeleton 10 is a circular column structure, and the first copper sheet 31 and the second copper sheet 32 ​​are respectively sleeved on the outer wall surface of the circular column structure; the first magnetic core 21 is provided with a first protrusion 211 on the side close to the second magnetic core 22, and the second magnetic core 22 is provided with a second protrusion 221 on the side close to the first magnetic core 21, and the two ends of the circular column structure are respectively sleeved on the first protrusion 211 and the second protrusion 222. The first magnetic core 21 and the second magnetic core 22 can be fixedly connected by glue; if the first magnetic core 21 and the second magnetic core 22 are provided with a first air gap sheet 61 and a second air gap sheet 62, the first magnetic core 21 is respectively fixedly connected to the first air gap sheet 61 and the second air gap sheet 62 by glue, and the second magnetic core 22 is also respectively fixedly connected to the first air gap sheet 61 and the second air gap sheet 62 by glue.

[0041] In other embodiments, the first copper sheet 31 includes multiple first sub-copper sheets, which are stacked on each other to form the first copper sheet 31, wherein each first sub-copper sheet is a spiral structure; further, the structures of the multiple first sub-copper sheets can be the same, and the overall first copper sheet 31 formed by corresponding stacking has the same structure as each first sub-copper sheet, but is thicker.

[0042] In other embodiments, the second copper sheet 32 ​​includes a plurality of second sub-copper sheets, which are stacked on each other to form the second copper sheet 32, wherein each second sub-copper sheet is a spiral structure; further, the structures of the plurality of second sub-copper sheets may be the same, and the overall second copper sheet 32 ​​formed by corresponding stacking has the same structure as each second sub-copper sheet, but is thicker.

[0043] The inductor proposed by the present invention has two copper sheets stacked together to form an alpha winding structure. Specifically, the two copper sheets are respectively arranged into a spiral structure with a plurality of turns of bending shapes, and a magnetic field distribution similar to that of a traditional coil is formed by precise arrangement and overlap. The inductor of the present invention has the following advantages:

[0044] (1) This design maximizes the total number of turns and area of ​​the copper sheet within the same space. At the same time, the total thickness of the inductor is reduced by stacking the copper sheets, thereby effectively reducing the volume of the inductor and achieving miniaturization. It can be used in space-constrained application scenarios, such as portable devices and wireless communication equipment.

[0045] (2) The copper sheet is larger on the outside and smaller on the inside, which makes the DCR distribution of the inductor more uniform and improves the heat dissipation performance, thereby increasing the life of the inductor.

[0046] (3) As the thickness is reduced, the skin effect of the inductor is also reduced, thereby improving energy conversion.

[0047] (4) The alpha winding structure is formed by stacking two copper sheets together, which can obtain a higher inductance value in the same volume and meet the application requirements of high frequency and high current.

[0048] (5) Compared with the single-piece copper sheet structure that forms the alpha winding, which has a very complex structure and process, the alpha winding structure formed by stacking two copper sheets in the present application is simpler, has a simpler process, is easier to produce, and the DCR can be distributed more evenly.

[0049] The background section of the present invention may contain background information about the problem or environment of the present invention, rather than describing the prior art by others. Therefore, the content contained in the background section is not an admission by the applicant that the prior art is available.

[0050] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of mutual contradiction, the technical personnel in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope defined by the attached claims.

Claims

1. An inductor, characterized in that: The invention comprises a skeleton, a first magnetic core, a second magnetic core, a first copper sheet, a second copper sheet, a first terminal and a second terminal, wherein the first terminal is electrically connected at the end of the first copper sheet, the second terminal is electrically connected at the end of the second copper sheet, the first copper sheet and the second copper sheet are mutually stacked and sleeved on the skeleton, the skeleton is arranged between the first magnetic core and the second magnetic core, and the first magnetic core and the second magnetic core are mutually fixedly connected; wherein the first copper sheet and the second copper sheet are respectively spiral structures, and the projections of the mutually stacked first copper sheet and the second copper sheet do not completely overlap and together constitute an alpha winding structure.

2. The inductor according to claim 1, characterized in that The widths of the inner circles of the first copper sheet and the second copper sheet are respectively smaller than the widths of their respective outer circles.

3. The inductor according to claim 1, characterized in that The widths of the first copper sheet and the second copper sheet gradually increase from the inner circle to the outer circle.

4. The inductor according to claim 1, wherein: The structures of the first copper sheet and the second copper sheet are completely the same, wherein the same side of the first copper sheet and the second copper sheet are stacked close to each other to form mutually staggered projections.

5. The inductor according to claim 1, wherein: The surfaces of the first copper sheet and the second copper sheet are respectively metallized or plated.

6. The inductor according to claim 1, characterized in that The first copper sheet comprises a plurality of first sub-copper sheets, and the plurality of first sub-copper sheets are stacked on each other to form the first copper sheet, wherein each of the first sub-copper sheets is a spiral structure; and / or, The second copper sheet includes a plurality of second sub-copper sheets, which are stacked on top of each other to form the second copper sheet, wherein each of the second sub-copper sheets is a spiral structure.

7. The inductor according to claim 1, characterized in that It also includes a first insulating sheet and a second insulating sheet, which are respectively sleeved on the frame, wherein the first insulating sheet is arranged between the first copper sheet and the first magnetic core, and the second insulating sheet is arranged between the second copper sheet and the second magnetic core.

8. The inductor according to claim 1, wherein: It also includes a third insulating sheet, which is sleeved on the frame and arranged between the first copper sheet and the second copper sheet.

9. The inductor according to claim 1, wherein: It also includes an air gap sheet, which is fixedly connected between the first magnetic core and the second magnetic core.

10. The inductor according to claim 1, wherein: The skeleton is a circular column structure, and the first copper sheet and the second copper sheet are respectively sleeved on the outer wall surface of the circular column structure; a first protrusion is provided on the side of the first magnetic core close to the second magnetic core, and a second protrusion is provided on the side of the second magnetic core close to the first magnetic core, and both ends of the circular column structure are respectively sleeved on the first protrusion and the second protrusion.

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