Vertical winding inductor

Abstract

The utility model provides a vertical winding inductor. The vertical winding inductor comprises a magnetic core and a first metal winding wire. Threaded protrusions which are evenly distributed are arranged on the cross section of the magnetic core, and a groove is formed between every two adjacent threaded protrusions. The first metal winding wire is wound in the groove in the thread direction of the thread protrusion, the adjacent metal winding wires on the cross section of the magnetic core are separated through the thread protrusion, and the height of the first metal winding wire on the cross section of the magnetic core is larger than that of the thread protrusion. According to the inductor, the threaded protrusions which are evenly distributed are arranged on the cross section of the magnetic core, the first metal winding wires are spaced at equal intervals, the heat dissipation performance of the inductor is improved, and meanwhile it is guaranteed that the electrical performance of the inductor is stable; and meanwhile, the first metal winding wire is clamped and fixed through the threaded bulge, so that the first metal winding wire can be effectively prevented from being vibrated due to Lorentz force during working, the squeal phenomenon is eliminated, and the reliability of the inductor is improved.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and in particular to bus power supply devices and control methods. Background Technology

[0002] Existing conventional vertically wound inductors use flat or enameled wire, wound vertically onto a cylindrical magnetic core. During winding, two opposing spiral windings are formed, wound in opposite directions on opposite sides of the magnetic core. In actual design, the coil material, wire diameter, and magnetic core material are adjusted according to application requirements. However, existing conventional vertically wound inductors have the following problems:

[0003] 1. Poor heat dissipation: The contact area between the closely packed copper wires is large, and heat accumulates in the winding gaps. It can only dissipate heat through the end face, and the heat dissipation area of ​​the internal magnetic core is even smaller.

[0004] 2. Poor mechanical stability: In order to optimize the heat dissipation performance of the coil and magnetic core, a certain gap is usually added between the coils to increase the air flow and improve the overall heat dissipation capacity of the inductor. However, increasing the winding gap requires complex tooling equipment and processes to ensure equal spacing and consistency. In addition, the copper wire of the coil will also vibrate in the alternating magnetic field due to the influence of the Lorentz force, which will cause certain noise or howling sound, as well as wear on the insulation layer of the coil. Utility Model Content

[0005] Therefore, it is necessary to provide a vertically wound inductor to address the aforementioned technical problems.

[0006] A vertically wound inductor, comprising:

[0007] A magnetic core, wherein the cross-section of the magnetic core is provided with uniformly distributed threaded protrusions, and a groove is formed between adjacent threaded protrusions;

[0008] A first metal winding is wound in the groove along the thread direction of the threaded protrusion, and the threaded protrusion separates adjacent metal windings on the cross-section of the magnetic core. The height of the first metal winding on the cross-section of the magnetic core is greater than the height of the threaded protrusion.

[0009] In one embodiment, the vertical winding inductor further includes:

[0010] A skeleton is fitted onto the magnetic core. The surface of the skeleton away from the magnetic core is provided with uniformly distributed threaded protrusions, and grooves are formed between adjacent threaded protrusions.

[0011] In one embodiment, the vertical winding inductor further includes:

[0012] The second metal winding is wound on the magnetic core and forms uniformly distributed threaded protrusions on the cross-section of the magnetic core, with grooves formed between adjacent threaded protrusions. The height of the second metal winding on the cross-section of the magnetic core is less than the height of the first metal winding on the cross-section of the magnetic core.

[0013] In one embodiment, the groove is coated with thermally conductive silicone.

[0014] In one embodiment, the pitch P between adjacent threaded protrusions is such that the width W of the first metal winding is 1.1W ≤ P ≤ 1.5W.

[0015] In one embodiment, the magnetic core is a cylindrical structure made of stacked silicon steel sheets, and the threaded protrusion is a rectangular threaded protrusion.

[0016] In one embodiment, the pitch between adjacent threaded protrusions is 1 mm, the height of the threaded protrusion on the cross-section of the magnetic core is 0.5 mm, and the height of the first metal winding on the cross-section of the magnetic core is 2 mm.

[0017] In one embodiment, the magnetic core is a cylindrical structure made of nanocrystalline soft magnetic material, and the threaded protrusion is a trapezoidal threaded protrusion.

[0018] In one embodiment, the pitch between adjacent threaded protrusions is 1.5 mm, the height of the threaded protrusion on the cross-section of the magnetic core is 0.6 mm, and the height of the first metal winding on the cross-section of the magnetic core is 3 mm.

[0019] Compared with existing technologies, the aforementioned vertically wound inductor includes a magnetic core and a first metal winding. The cross-section of the magnetic core has uniformly distributed threaded protrusions, and grooves are formed between adjacent threaded protrusions. The first metal winding is wound within the grooves along the thread direction of the threaded protrusions, and the threaded protrusions space adjacent metal windings on the cross-section of the magnetic core. The height of the first metal winding on the cross-section of the magnetic core is greater than the height of the threaded protrusions. This application achieves equidistant spacing between the first metal windings by providing uniformly distributed threaded protrusions on the cross-section of the magnetic core, improving the inductor's heat dissipation performance and ensuring stable electrical performance. Simultaneously, clamping and fixing the first metal windings with the threaded protrusions effectively prevents vibration caused by Lorentz force during operation, thereby eliminating howling and improving the inductor's reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic cross-section of a vertically wound inductor provided in an embodiment of this application. Figure 1 ;

[0022] Figure 2 A schematic cross-section of a vertically wound inductor provided in an embodiment of this application. Figure 2 ;

[0023] Figure 3 A schematic cross-section of a vertically wound inductor provided in an embodiment of this application. Figure 3 .

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Vertical winding inductor; 100. Magnetic core; 200. First metal winding; 300. Frame; 400. Second metal winding. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] The serial numbers assigned to components in this document, such as "first" and "second," are used solely to distinguish the objects being described and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0030] Unless otherwise defined, 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 application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figure 1 One embodiment of this application provides a vertically wound inductor 10. The vertically wound inductor 10 includes a magnetic core 100 and a first metal winding 200. The cross-section of the magnetic core 100 has uniformly distributed threaded protrusions, and grooves are formed between adjacent threaded protrusions. The first metal winding 200 is wound within the grooves along the thread direction of the threaded protrusions, and the threaded protrusions space adjacent metal windings on the cross-section of the magnetic core 100. The height of the first metal winding 200 on the cross-section of the magnetic core 100 is greater than the height of the threaded protrusions.

[0032] In some embodiments, the first metal winding 200 can be a flat copper wire. In some embodiments, the height and spacing of the threaded protrusions can be designed according to the performance requirements of the inductor, and no specific numerical limitation is imposed here. In some embodiments, the flat copper wire (i.e., the first metal winding 200) is wound along the thread direction of the threaded protrusions of the magnetic core 100, and each turn of the flat copper wire is clamped and fixed by two adjacent threaded protrusions, thereby achieving an equal spacing between the flat copper wires. This structure not only ensures good heat dissipation between the flat copper wires, but also effectively avoids vibration caused by Lorentz force during operation because the flat copper wires are clamped by the threaded protrusions, thus eliminating the whistling phenomenon.

[0033] In some embodiments, the magnetic core 100 may be made of a soft magnetic material, thereby increasing the permeability of the vertically wound inductor and enhancing its performance.

[0034] In some embodiments, the threaded protrusions may be rectangular, trapezoidal, or other shapes suitable for clamping copper wire. In some embodiments, the pitch P between adjacent threaded protrusions and the width W of the first metal winding must satisfy: 1.1W ≤ P ≤ 1.5W. This ensures that during winding, the flat copper wire is wound along the threaded groove (i.e., the groove), allowing the sidewalls of the flat copper wire to embed between adjacent threaded protrusions. The sides of the threaded protrusions provide axial restraint to the flat copper wire, ensuring the stability and reliability of the flat copper wire during the winding process.

[0035] In this embodiment, by providing uniformly distributed threaded protrusions on the cross-section of the magnetic core 100, the equal spacing between the first metal windings 200 is achieved, which improves the heat dissipation performance of the inductor and ensures the stability of the electrical performance of the inductor. At the same time, clamping and fixing the first metal windings 200 with the threaded protrusions can also effectively prevent the first metal windings 200 from vibrating due to Lorentz force during operation, thereby eliminating the whistling phenomenon and improving the reliability of the inductor.

[0036] In some embodiments, such as Figure 2 As shown, the vertically wound inductor further includes a frame 300. The frame 300 is sleeved on the magnetic core 100. The surface of the frame 300 away from the magnetic core 100 is provided with uniformly distributed threaded protrusions, and grooves are formed between adjacent threaded protrusions. In some embodiments, the first metal winding 200 is wound in the groove along the thread direction of the threaded protrusion, and the threaded protrusions space adjacent metal windings on the cross-section of the magnetic core 100. The height of the first metal winding 200 on the cross-section of the magnetic core 100 is greater than the height of the threaded protrusions. In this embodiment, by separately molding the frame 300 and then sleeve the frame 300 on the magnetic core 100, a magnetic core 100 with a threaded structure is formed, which is easier to process than directly molding the threaded protrusions on the magnetic core 100.

[0037] In some embodiments, such as Figure 3As shown, the vertically wound inductor further includes a second metal winding 400. The second metal winding 400 is wound on the magnetic core 100, and uniformly distributed threaded protrusions are formed on the cross-section of the magnetic core 100, with grooves formed between adjacent threaded protrusions. The height of the second metal winding 400 on the cross-section of the magnetic core 100 is less than the height of the first metal winding 200 on the cross-section of the magnetic core 100. In some embodiments, the first metal winding 200 and the second metal winding 400 are uniformly and crosswise wound on the magnetic core 100. Simultaneously, the ends of the second metal winding 400 and the first metal winding 200 can be short-circuited together, so that the second metal winding 400 both functions as a threaded protrusion and enhances the current-carrying capacity of the first metal winding 200.

[0038] In some embodiments, the groove is coated with thermally conductive silicone. Specifically, before the first metal winding 200 is wound, thermally conductive silicone can be pre-coated in the groove formed between adjacent threaded protrusions, thereby further enhancing the heat dissipation and vibration damping effects of the coil and magnetic core through the thermally conductive silicone.

[0039] In some embodiments, the magnetic core 100 is a cylindrical structure formed by stacking silicon steel sheets. The threaded protrusions are rectangular. In some embodiments, the pitch between adjacent threaded protrusions is 1 mm. The height of the threaded protrusions on the cross-section of the magnetic core 100 is 0.5 mm. The height of the first metal winding 200 on the cross-section of the magnetic core 100 is 2 mm.

[0040] Specifically, the magnetic core 100 adopts a cylindrical structure made of stacked silicon steel sheets, and the outer surface of the magnetic core 100 is machined with uniformly distributed rectangular threaded protrusions. The pitch of adjacent rectangular threaded protrusions is 1 mm, and the height of the rectangular threaded protrusions on the cross-section of the magnetic core 100 is 0.5 mm. The width of the flat copper wire (i.e., the first metal winding 200) is 0.3 mm, and the height of the flat copper wire on the cross-section of the magnetic core 100 is 2 mm. During the winding process, the flat copper wire is wound along the threads of the rectangular threaded protrusions of the magnetic core 100. Each turn of the flat copper wire is clamped and fixed by two adjacent rectangular threaded protrusions, and the spacing between the flat copper wires is determined by the pitch of the rectangular threaded protrusions and is maintained at about 1 mm. This inductor structure has good heat dissipation during operation, and the copper wire does not produce vibration or whistling phenomena.

[0041] In some embodiments, the magnetic core 100 is a cylindrical structure made of nanocrystalline soft magnetic material. The threaded protrusions are trapezoidal in shape. In some embodiments, the pitch between adjacent threaded protrusions is 1.5 mm. The height of the threaded protrusions in the cross-section of the magnetic core 100 is 0.6 mm. The height of the first metal winding 200 in the cross-section of the magnetic core 100 is 3 mm.

[0042] Specifically, the magnetic core 100 is a cylindrical structure made of nanocrystalline soft magnetic material, and its outer surface is machined with uniformly distributed trapezoidal thread protrusions. The pitch between adjacent trapezoidal thread protrusions is 1.5 mm, and the height of the trapezoidal thread protrusions on the cross-section of the magnetic core 100 is 0.6 mm. The width of the flat copper wire (i.e., the first metal winding 200) is 0.4 mm, and the height of the flat copper wire on the cross-section of the magnetic core 100 is 3 mm. During the winding process, the flat copper wire is wound along the threads of the trapezoidal thread protrusions of the magnetic core 100. Each turn of the flat copper wire is clamped and fixed by two adjacent trapezoidal thread protrusions, and the spacing between the flat copper wires is determined by the pitch of the trapezoidal thread protrusions, maintaining it at approximately 1.5 mm. This structure provides the inductor with higher permeability, while also ensuring good heat dissipation and vibration resistance.

[0043] In summary, this application achieves equal spacing between the first metal windings 200 by providing uniformly distributed threaded protrusions on the cross-section of the magnetic core 100, thereby improving the heat dissipation performance of the inductor and ensuring the stability of the inductor's electrical performance. At the same time, clamping and fixing the first metal windings 200 with the threaded protrusions can also effectively prevent the first metal windings 200 from vibrating due to Lorentz force during operation, thereby eliminating the whistling phenomenon and improving the reliability of the inductor.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A vertically wound inductor, characterized in that, include: A magnetic core (100) has uniformly distributed threaded protrusions on its cross-section, and a groove is formed between adjacent threaded protrusions. The first metal winding (200) is wound in the groove along the thread direction of the threaded protrusion, and the threaded protrusion separates adjacent metal windings on the cross-section of the magnetic core (100). The height of the first metal winding (200) on the cross-section of the magnetic core (100) is greater than the height of the threaded protrusion.

2. The vertically wound inductor as described in claim 1, characterized in that, Also includes: A skeleton (300) is sleeved on the magnetic core (100). The surface of the skeleton (300) away from the magnetic core (100) is provided with uniformly distributed threaded protrusions, and a groove is formed between adjacent threaded protrusions.

3. The vertically wound inductor as described in claim 1, characterized in that, Also includes: The second metal winding (400) is wound on the magnetic core (100) and forms uniformly distributed threaded protrusions on the cross-section of the magnetic core (100), and a groove is formed between adjacent threaded protrusions. The height of the second metal winding (400) on the cross-section of the magnetic core (100) is less than the height of the first metal winding (200) on the cross-section of the magnetic core (100).

4. The vertically wound inductor as described in any one of claims 1-3, characterized in that, The groove is coated with thermally conductive silicone.

5. The vertically wound inductor as described in any one of claims 1-3, characterized in that, The pitch P between adjacent threaded protrusions and the width W of the first metal winding (200) are: 1.1W≤P≤1.5W.

6. The vertically wound inductor as described in any one of claims 1-3, characterized in that, The magnetic core (100) is a cylindrical structure made of stacked silicon steel sheets, and the threaded protrusion is a rectangular threaded protrusion.

7. The vertically wound inductor as described in claim 6, characterized in that, The pitch between adjacent threaded protrusions is 1 mm, the height of the threaded protrusion on the cross-section of the magnetic core (100) is 0.5 mm, and the height of the first metal winding (200) on the cross-section of the magnetic core (100) is 2 mm.

8. The vertically wound inductor as described in any one of claims 1-3, characterized in that, The magnetic core (100) is a cylindrical structure made of nanocrystalline soft magnetic material, and the threaded protrusion is a trapezoidal threaded protrusion.

9. The vertically wound inductor as described in claim 8, characterized in that, The pitch between adjacent threaded protrusions is 1.5 mm, the height of the threaded protrusion on the cross-section of the magnetic core (100) is 0.6 mm, and the height of the first metal winding (200) on the cross-section of the magnetic core (100) is 3 mm.

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