Core structure and magnetic components

Abstract

The present application discloses a magnetic core structure and a magnetic element. The magnetic core structure includes: N winding posts and two cover plates, where N is a positive integer. Each winding post is provided with a first hollow channel; two cover plates are provided at both ends of each winding post, each cover plate is provided with N first through holes, the N winding posts are arranged one-to-one with the N first through holes of each cover plate, and the first hollow channel of each winding post is connected with the first through holes located on both sides thereof and opposite to each other. Therefore, the air flow channel can be increased, so that the heat dissipation efficiency can be improved when the magnetic core structure is applied to the magnetic element.

Description

Technical Field

[0001] The present application relates to a magnetic core structure and a magnetic element, and in particular to a magnetic core structure and a magnetic element capable of improving heat dissipation efficiency. Background Art

[0002] Magnetic components, such as transformers or inductors, are widely used in power supplies. As the volume power density of power supplies increases, the temperature of magnetic components rises due to high power output. If the internal heat dissipation of magnetic components is not good, it is easy to cause problems such as poor operating performance, reduced reliability, and shortened life of the magnetic components.

[0003] Therefore, how to provide a magnetic core structure that, when applied to a magnetic element, is conducive to dissipating the heat generated by the operation of the magnetic element and improving the heat dissipation efficiency has become one of the important topics. Summary of the invention

[0004] The embodiments of the present application provide a magnetic core structure and a magnetic element, the structural design of which facilitates the heat generated by the operation of the magnetic element to be dissipated, thereby improving the heat dissipation efficiency.

[0005] The present application provides a magnetic core structure, which includes: N winding posts and two cover plates, where N is a positive integer. Each winding post is provided with a first hollow channel; two cover plates are provided at both ends of each winding post, each cover plate is provided with N first through holes, the N winding posts are arranged one-to-one with the N first through holes of each cover plate, and the first hollow channel of each winding post is connected with the first through holes located on both sides thereof and opposite to each other.

[0006] The present application provides a magnetic element, which includes: the magnetic core structure of the present application and N windings, the N windings are wound on N winding poles, and N is a positive integer.

[0007] The present application also provides another magnetic element, which includes: a magnetic core structure, a winding frame and a coil. The magnetic core structure includes: a winding post, two cover plates and two support posts; the winding post is provided with a first hollow channel; the two cover plates are provided at both ends of the winding post, each cover plate is provided with a first through hole, the winding post is provided corresponding to the first through hole of each cover plate, and the first hollow channel of the winding post is connected to the first through holes located on both sides and opposite to each other; the two ends of each support post are connected to the two cover plates, the two support posts are respectively provided on the two sides of each cover plate, and the winding post is provided between the two support posts; each cover plate is also provided with two second through holes, and the two second through holes are provided on opposite sides of the first through hole. The winding frame includes a hollow sleeve, at least two blades provided at both ends of the hollow sleeve and at least one convex strip provided on the outer surface of the hollow sleeve, the winding post is accommodated in the hollow sleeve, the side edge of each blade is provided with a groove, and the groove of each blade is provided corresponding to the adjacent second through hole. The coil is wound around the outer surface of the hollow sleeve and contacts the at least one convex strip, so that a gap is formed between the coil and the outer surface of the hollow sleeve. The projection of each cover plate onto another cover plate covers the at least one convex strip and each blade.

[0008] In the magnetic core structure of the embodiment of the present application, the first hollow channel of each winding post is connected with the first through holes located on both sides and opposite to each other, so that the air flow channel can be increased, so that the magnetic core structure can improve the heat dissipation efficiency when applied to the magnetic element. In addition, in the magnetic element of the embodiment of the present application, the first hollow channel of the winding post is connected with the first through holes located on both sides and opposite to each other, the winding post is accommodated in the hollow sleeve of the winding frame, the coil is wound on the outer surface of the hollow sleeve and a gap is formed between the outer surface of the hollow sleeve and the coil, the groove of each blade is correspondingly arranged with the adjacent second through hole, and the projection of each cover plate onto the other cover plate covers the convex strip and the blade design, so that air can pass through the cover plate through the first hollow channel, and can pass through the cover plate through the second through hole without being blocked by the convex strip, so as to establish an effective air duct, thereby improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0010] Figure 1 is a three-dimensional diagram of a first embodiment of a magnetic element according to the present application;

[0011] Figure 2 for Figure 1 Exploded diagram of magnetic components;

[0012] Figure 3 for Figure 1 A cross-sectional view of a magnetic element along line segment AA';

[0013] Figure 4 is a three-dimensional diagram of a second embodiment of a magnetic element according to the present application;

[0014] Figure 5 for Figure 4 A cross-sectional view of a magnetic element along line segment BB';

[0015] Figure 6 is a three-dimensional diagram of a third embodiment of a magnetic element according to the present application;

[0016] Figure 7 for Figure 6 Exploded diagram of magnetic components;

[0017] Figure 8 for Figure 7 A top view of four windings and four winding posts arranged on a cover plate;

[0018] Fig. 9 is a three-dimensional diagram of a fourth embodiment of a magnetic element according to the present application;

[0019] Fig.10 for Fig. 9 Exploded diagram of magnetic components;

[0020] Fig.11 for Fig. 9 A top view of four windings and four winding posts arranged on a cover plate;

[0021] Fig.12 is an exploded view of a fifth embodiment of a magnetic element according to the present application;

[0022] Fig.13 for Fig.12 A top view of two support columns, two winding columns and two windings arranged on a cover plate;

[0023] Fig.14 is an exploded view of a sixth embodiment of a magnetic element according to the present application;

[0024] Fig.15 for Fig.14 Combination diagram of magnetic components;

[0025] Fig.16 is a perspective view of a seventh embodiment of a magnetic element according to the present application;

[0026] Fig.17 for Fig.16 A side view of a magnetic core structure;

[0027] Fig.18 A schematic diagram of an embodiment of a cover plate of the present application;

[0028] Fig.19This is a schematic diagram of another embodiment of the cover plate of the present application;

[0029] Fig. 20 is a perspective view of a seventh embodiment of a magnetic element according to the present application;

[0030] Fig.21 for Fig. 20 A cross-sectional view of a magnetic element along line segment CC';

[0031] Fig. 22 is a three-dimensional diagram of an eighth embodiment of a magnetic element according to the present application; and

[0032] Fig.23 for Fig. 22 An assembled side view of the magnetic components. DETAILED DESCRIPTION

[0033] The embodiments of the present invention will be described below with reference to the accompanying drawings. In these drawings, the same reference numerals represent the same or similar components or method flows.

[0034] It must be understood that the words "comprises", "including", etc. used in this specification are used to indicate the existence of specific technical features, values, method steps, job processing, components and / or assemblies, but do not exclude the addition of more technical features, values, method steps, job processing, components, assemblies, or any combination of the above.

[0035] In addition, when a component is described as being "connected" or "coupled" to another component, it may be directly connected or coupled to the other component, and intermediate components may be present. Conversely, when a component is described as being "directly connected" or "directly coupled" to another component, there are no intermediate components.

[0036] See also Figure 1 and Figure 2 , Figure 1 is a three-dimensional diagram of a first embodiment of a magnetic element according to the present application, Figure 2 for Figure 1 Exploded view of magnetic components. Figure 1 and Figure 2 As shown, the magnetic element 100 includes: a winding 110 and a magnetic core structure 200. The magnetic element 100 may be, but not limited to, an inductor, and the winding 110 may be, but not limited to, a round coil, a flat coil, or a copper sheet winding.

[0037] In this embodiment, the magnetic core structure 200 includes a winding post 210 and two cover plates 220. The winding post 210 is provided with a first hollow channel 212, and the winding 110 is wound on the winding post 210. The two cover plates 220 are provided at both ends of the winding post 210, and each cover plate 220 is provided with a first through hole 222. The winding post 210 and the first through hole 222 of each cover plate 220 are provided correspondingly, and the first hollow channel 212 of the winding post 210 is connected with the first through holes 222 located on both sides thereof and opposite to each other. The two cover plates 220 have the same structure and are arranged opposite to each other. The material of the winding post 210 and the cover plate 220 can be an iron powder core with low magnetic permeability, such as iron-silicon alloy and iron-nickel alloy, or a ferrite with higher magnetic permeability, but this embodiment is not used to limit the present application.

[0038] The first hollow channel 212 of the winding post 210 is connected to the first through holes 222 located on both sides thereof and opposite to each other, so that the air flow channel can be increased and the heat dissipation area can be increased to help the magnetic core structure 200 cool down, so that the heat dissipation efficiency can be improved when the magnetic core structure 200 is applied to the magnetic element 100. In addition, in order to further improve the heat dissipation efficiency, it can be considered to reduce the number of turns of the winding 110 or adjust the wire diameter of the winding 110 to reduce the heat source or adjust the ratio of copper loss to iron loss.

[0039] In one embodiment, the winding post 210 may have a dispersed air gap 214. In other words, the winding post 210 may include a plurality of hollow magnetic posts 50, and an air gap 214 may be provided between any two adjacent hollow magnetic posts 50.

[0040] In one embodiment, an air gap may be provided between the winding post 210 and each cover plate 220 .

[0041] In one embodiment, the magnetic core structure 200 may further include two support columns 230, each of which has two ends connected to the two cover plates 220, and the two support columns 230 may be respectively disposed on two sides of each cover plate 220, and the winding column 210 is disposed between the two support columns 230. The material of the support column 230 may be an iron powder core with low magnetic permeability or a ferrite with high magnetic permeability.

[0042] In one embodiment, each cover plate 220 is further provided with two second through holes 224, and the two second through holes 224 are provided on opposite sides of the first through hole 222. Therefore, the cover plate 220 can increase the air flow channel and the heat dissipation area through the provision of the second through holes 224, so that when the magnetic core structure 200 is applied to the magnetic element 100, it can help the winding 110 to cool down, thereby improving the heat dissipation efficiency.

[0043] See also Figure 3 , Figure 3 for Figure 1The cross-sectional view of the magnetic element along the line segment AA'. Figure 3 As shown, the cross-sectional area of ​​the first hollow channel 212 and the area of ​​each second through hole 224 may be less than or equal to 50% of the cross-sectional area of ​​the winding post 210. The first hollow channel 212 is connected to the first through hole 222, and the cross-sectional shape and size of the first hollow channel 212 may be equal to the shape and size of the first through hole 222; the winding post 210 may be, but not limited to, an elliptical columnar body, and may have a first hollow channel 212 with an elliptical cross-sectional shape.

[0044] See also Figure 4 and Figure 5 , Figure 4 is a three-dimensional diagram of a second embodiment of a magnetic element according to the present application. Figure 5 for Figure 4 The cross-sectional view of the magnetic element along line segment BB'. Figure 4 and Figure 5 As shown, the difference between this embodiment and the first embodiment is that each cover plate 220 may also be provided with two third through holes 226, two support columns 230 are arranged one-to-one with the two third through holes 226 of each cover plate 220, and each support column 230 is provided with a second hollow channel 232, and the second hollow channel 232 of each support column 230 is connected with the third through holes 226 located on both sides and opposite to each other. Among them, the two cover plates 220 have the same structure and are arranged opposite to each other; the cross-sectional shape and size of the first hollow channel 212 may be equal to the shape and size of the first through hole 222; the cross-sectional shape and size of the second hollow channel 232 may be equal to the shape and size of the corresponding third through hole 226; the winding post 210 may be, but not limited to, a circular columnar body, and may have a first hollow channel 212 with a circular cross-sectional shape; the total area of ​​the first through hole 222 and the two third through holes 226 of the cover plate 220 may be less than or equal to 80% of the area of ​​the surface of the cover plate 220 away from the winding post 210. Therefore, by connecting the second hollow channel 232 of the support column 230 with the third through holes 226 located on both sides thereof and opposite to each other, the air flow channel can be increased and the heat dissipation area can be increased to help cool the magnetic core structure 200, so that the heat dissipation efficiency can be improved when the magnetic core structure 200 is applied to the magnetic element 100.

[0045] See also Figures 6 to 8 , Figure 6 is a three-dimensional diagram of a third embodiment of a magnetic element according to the present application. Figure 7 for Figure 6 Exploded diagram of magnetic components, Figure 8 for Figure 7 A top view of the four windings and four winding posts arranged on the cover. Figures 6 to 8As shown, the magnetic element 300 includes: four windings 310 and a magnetic core structure 400. The magnetic element 300 may be, but not limited to, an inductor, and the winding 310 may be, but not limited to, a round coil, a flat coil or a copper sheet winding. In this embodiment, the magnetic core structure 400 includes four winding posts 410 and two cover plates 420, each winding post 410 is provided with a first hollow channel 412, and the four windings 310 are wound on the four winding posts 410; the two cover plates 420 are provided at both ends of each winding post 410, and each cover plate 420 is provided with four first through holes 422, and the four winding posts 410 and the four first through holes 422 of each cover plate 420 are arranged one-to-one, and the first hollow channel 412 of each winding post 410 is connected to the first through holes 422 located on both sides thereof and opposite to each other. The material of the winding post 410 and the cover plate 420 may be an iron powder core with low magnetic permeability or a ferrite with high magnetic permeability. In addition, each cover plate 420 is provided with a fourth through hole 428 between any two adjacent first through holes 422 ; since the four first through holes 422 of this embodiment are arranged on the cover plate 420 in a matrix manner, the cover plate 420 is provided with four fourth through holes 428 .

[0046] The two cover plates 420 have the same structure and are arranged opposite to each other; the cross-sectional shape and size of the first hollow channel 412 may be equal to the shape and size of the first through hole 422; the winding post 410 may be, but not limited to, an elliptical columnar body, and may have a first hollow channel 412 whose cross-sectional shape is, for example, an elliptical shape; the total area of ​​the four first through holes 422 and the four fourth through holes 428 of the cover plate 420 may be less than or equal to 80% of the area of ​​the surface of the cover plate 420 away from the four winding posts 410. Therefore, by connecting the first hollow channel 412 of the winding post 410 with the first through holes 422 located on both sides thereof and opposite to each other, and by providing the fourth through holes 428, the air flow channel can be increased, and the heat dissipation area can be increased, so that when the magnetic core structure 400 is applied to the magnetic element 300, it can help the magnetic core structure 400 and the winding 310 to cool down, thereby improving the heat dissipation efficiency.

[0047] See also Figures 9 to 11 , Fig. 9 is a three-dimensional diagram of a fourth embodiment of a magnetic element according to the present application. Fig.10 for Fig. 9 Exploded diagram of magnetic components, Fig.11 for Fig. 9 A top view of the four windings and four winding posts arranged on the cover. Figures 9 to 11As shown, the difference between this embodiment and the third embodiment is that each cover plate 420 is not provided with a fourth through hole 428, but may be provided with a fifth through hole 429 located at the center of the distribution position of the four first through holes 422. The total area of ​​the four first through holes 422 and the fifth through hole 429 of the cover plate 420 may be less than or equal to 80% of the area of ​​the surface of the cover plate 420 away from the four winding posts 410. Therefore, by connecting the first hollow channel 412 of the winding post 410 with the first through holes 422 located on both sides thereof and opposite to each other, and by providing the fifth through hole 429, the air flow channel can be increased, and the heat dissipation area can be increased, so that when the magnetic core structure 400 is applied to the magnetic element 300, it can help the magnetic core structure 400 and the winding 310 to cool down, thereby improving the heat dissipation efficiency.

[0048] See also Fig.12 and Fig.13 , Fig.12 FIG. 5 is an exploded view of a fifth embodiment of a magnetic element according to the present application. Fig.13 for Fig.12 A top view of two support columns, two winding columns and two windings arranged on the cover. Fig.12 and Fig.13As shown, the magnetic element 500 includes: two windings 510 and a magnetic core structure 600. The magnetic element 500 may be, but not limited to, an inductor, and the winding 510 may be, but not limited to, a round coil, a flat coil or a copper sheet winding. The magnetic core structure 600 includes two winding posts 610, two cover plates 620 and two support posts 630. Each winding post 610 is provided with a first hollow channel 612. Two windings 510 are wound on the two winding posts 610. Two cover plates 620 are provided at both ends of each winding post 610. Each cover plate 620 is provided with two first through holes 622. The two winding posts 610 and the two first through holes 622 of each cover plate 620 are arranged one-to-one. The first hollow channel 612 of each winding post 610 is connected with the first through holes 622 located on both sides thereof and opposite to each other. The two ends of each support post 630 are connected with the two cover plates 620. The two support posts 630 are respectively provided on the two sides of each cover plate 620. The two winding posts 610 are provided between the two support posts 630. In addition, each cover plate 620 is provided with a fourth through hole 628 between two adjacent first through holes 622. In addition, the cross-sectional shape and size of the first hollow channel 612 may be equal to the shape and size of the first through hole 622; the total area of ​​the two first through holes 622 and the fourth through hole 628 of the cover plate 620 may be less than or equal to 80% of the area of ​​the surface of the cover plate 620 away from the two winding posts 610. Therefore, the first hollow channel 612 of the winding post 610 is connected with the first through holes 622 located on both sides thereof and opposite to each other, and the fourth through hole 628 is provided, so that the air flow channel can be increased, and the heat dissipation area can be increased, so that when the magnetic core structure 600 is applied to the magnetic element 500, it can help the magnetic core structure 600 and the winding 510 to cool down, thereby improving the heat dissipation efficiency.

[0049] In one embodiment, each cover plate 620 may also be provided with two third through holes 626, and two support columns 630 are arranged one-to-one with the two third through holes 626 of each cover plate 620, and each support column 630 is provided with a second hollow channel 632, and the second hollow channel 632 of each support column 630 is connected with the third through holes 626 located on both sides and opposite to each other. The cross-sectional shape and size of the second hollow channel 632 may be equal to the shape and size of the third through holes 626; the total area of ​​the two first through holes 622, the fourth through hole 628 and the two third through holes 626 of the cover plate 620 may be less than or equal to 80% of the area of ​​the surface of the cover plate 620 away from the two winding columns 610. Therefore, by connecting the second hollow channel 632 of the support column 630 with the third through holes 626 located on both sides and opposite to each other, the air flow channel can be increased, and the heat dissipation area can be increased to help the magnetic core structure 600 cool down, so that the heat dissipation efficiency can be improved when the magnetic core structure 600 is applied to the magnetic element 500.

[0050] See also Fig.14 and Fig.15 , Fig.14 FIG. 6 is an exploded view of a sixth embodiment of a magnetic element according to the present application. Fig.15 for Fig.14 The combination diagram of magnetic components. Fig.14 and Fig.15 As shown, the magnetic element 700 includes: two windings 710 and a magnetic core structure 800. The magnetic element 700 may be, but not limited to, an inductor, and the winding 710 may be, but not limited to, a round coil, a flat coil or a copper sheet winding. The magnetic core structure 800 includes two winding posts 810 and two cover plates 820, each of which is provided with a first hollow channel 812, and the two winding posts 810 are respectively provided on both sides of each cover plate 820, and the two windings 710 are wound on the two winding posts 810; the two cover plates 820 are provided at both ends of each winding post 810, and each cover plate 820 is provided with two first through holes 822, and the two winding posts 810 are arranged one-to-one with the two first through holes 822 of each cover plate 820, and the first hollow channel 812 of each winding post 810 is connected with the first through holes 822 located on both sides thereof and opposite to each other. Therefore, by connecting the first hollow channel 812 of the winding column 810 with the first through holes 822 located on both sides thereof and opposite to each other, the air flow channel can be increased and the heat dissipation area can be increased to help cool the magnetic core structure 800, so that the heat dissipation efficiency can be improved when the magnetic core structure 800 is applied to the magnetic element 700.

[0051] In one embodiment, each cover plate 820 is provided with a fourth through hole 828 (eg, Fig.16 As shown, Fig.16 3D is a perspective view of a seventh embodiment of a magnetic element according to the present application.

[0052] See also Fig.16 and Fig.17 , Fig.17 for Fig.16 A side view of the core structure. Fig.16 and Fig.17 As shown, the cover plate 820 includes a middle area 824 and two side areas 825 located on both sides of the middle area 824 on the surface away from the two winding poles 810. The middle area 824 corresponds to the fourth through hole 828, and the two side areas 825 correspond to the two first through holes 822. In this embodiment, the edge between the middle area 824 and the two side areas 825 (such as Fig.17The fourth through hole 828 may have an area less than or equal to 80% of the area of ​​the middle region 824, and the area of ​​each first through hole 822 may be less than or equal to 80% of the area of ​​the corresponding side region 825. It should be noted that in other applications, the tangent line or edge of the fourth through hole 828 may not overlap with the edge between the middle region 824 and the two side regions 825, and the present invention is not limited thereto. The outline of the fourth through hole 828 may be, but is not limited to, a rectangle (such as Fig.17 As shown), square (as Fig.18 As shown, Fig.18 is a schematic diagram of an embodiment of the cover plate of the present application), oval or circular (such as Fig.19 As shown, Fig.19 Schematic diagram of another embodiment of the cover plate of the present application), the rectangle may be but not limited to a rounded rectangle or a right-angled rectangle, and the square may be but not limited to a rounded square or a right-angled square. When the first through hole 822 maintains the same shape and size, and the fourth through hole 828 has a similar cross-sectional area but a different shape, the magnetic flux and iron loss when the outline of the fourth through hole 828 is a rounded rectangle are smaller than the magnetic flux and iron loss when the outline of the fourth through hole 828 is a square or a circle.

[0053] In one embodiment, the aspect ratio of the fourth through hole 828 may be 0.95 to 1.05. The aspect ratio of the fourth through hole 828 is the ratio between the length P of the fourth through hole 828 in the first direction F and the length Q of the fourth through hole 828 in the second direction S, and the first direction F and the second direction S are perpendicular to each other. In addition, when the first through hole 822 maintains the same shape and size, and the outline of the fourth through hole 828 is a rounded rectangle but has different aspect ratios, the magnetic flux and iron loss of the fourth through hole 828 when the aspect ratio is 0.95 to 1.05 are smaller than those when the aspect ratios are other than the magnetic flux and iron loss.

[0054] In one embodiment, the outline of each first through hole 822 may be, but not limited to, a rectangle or a square, the rectangle may be, but not limited to, a rounded rectangle or a right-angled rectangle, the square may be, but not limited to, a rounded square or a right-angled square, and the aspect ratio of each first through hole 822 is 0.95 to 1.05. The aspect ratio of the first through hole 822 is the ratio between the length X of the first through hole 822 in the first direction F and the length Y of the first through hole 822 in the second direction S, and the first direction F and the second direction S are perpendicular to each other. In addition, when the fourth through hole 828 maintains the same shape and size, the outline of the first through hole 822 is a rounded rectangle but has a different aspect ratio, the magnetic flux and iron loss of the first through hole 822 when the aspect ratio is 0.95 to 1.05 are smaller than the magnetic flux and iron loss when the aspect ratio is other than 0.95.

[0055] See also Fig. 20and Fig.21 , Fig. 20 is a perspective view of a seventh embodiment of a magnetic element according to the present application. Fig.21 for Fig. 20 The cross-sectional view of the magnetic element along the line segment CC'. Fig. 20 and Fig.21 As shown, the difference between this embodiment and the sixth embodiment is that the number of winding posts 810 is three, two of the three winding posts 810 are respectively arranged on both sides of each cover plate 820, and the other winding posts 810 are arranged between the two winding posts 810. In addition, because a fourth through hole 828 is arranged between two adjacent first through holes 822, the number of the fourth through holes 828 of the cover plate 820 of the seventh embodiment is two.

[0056] See also Fig. 22 and Fig.23 , Fig. 22 is a three-dimensional diagram of an eighth embodiment of a magnetic element according to the present application. Fig.23 for Fig. 22 The assembled side view of the magnetic components. Fig. 22 and Fig.23 As shown, the magnetic element 900 includes: a magnetic core structure 910, a winding frame 920 and a coil 930. The magnetic core structure 910 includes: a winding post 912, two cover plates 914 and two support posts 916; the winding post 912 is provided with a first hollow channel 60; the two cover plates 914 are provided at both ends of the winding post 912, each cover plate 914 is provided with a first through hole 70 and two second through holes 80, and the two second through holes 80 are provided on opposite sides of the first through hole 70, the winding post 912 is provided corresponding to the first through hole 70 of each cover plate 914, and the first hollow channel 60 of the winding post 912 is connected to the first through holes 70 located on both sides thereof and opposite to each other; the two ends of each support post 916 are connected to the two cover plates 914, the two support posts 916 are respectively provided on the two sides of each cover plate 914, and the winding post 912 is provided between the two support posts 916. The winding frame 920 includes a hollow sleeve 922, at least two blades 924 disposed at both ends of the hollow sleeve 922, and at least one convex strip 90 disposed on the outer surface of the hollow sleeve 922. The winding post 912 is accommodated in the hollow sleeve 922. A groove 40 is concavely disposed on the side of each blade 924. The groove 40 of each blade 924 is disposed correspondingly to the adjacent second through hole 80. The coil 930 is wound around the outer surface of the hollow sleeve 922 and contacts the at least one convex strip 90, so that a gap 30 is formed between the coil 930 and the outer surface of the hollow sleeve 922. The projection of each cover plate 914 onto the other cover plate 914 covers the at least one convex strip 90 and each blade 924.

[0057] The number of the ridges 90 may be, but is not limited to, four, and the four ridges 90 are disposed at diagonal positions on the outer surface of the hollow sleeve 922, but this embodiment is not intended to limit the present application. Fig. 22 Due to the viewing angle, a convex strip 90 cannot be shown in the drawing.

[0058] In addition, the winding column 912 may include a hollow magnetic column 50a and a hollow magnetic column 50b, one end of the hollow magnetic column 50a is connected to the cover plate 914, the other end of the hollow magnetic column 50a and one end of the hollow magnetic column 50b have an air gap or are connected to each other, and the other end of the hollow magnetic column 50b is connected to another cover plate 914.

[0059] In addition, the support column 916 may include a first magnetic column 20a and a second magnetic column 20b, one end of the first magnetic column 20a is connected to the cover plate 914, the other end of the first magnetic column 20a and one end of the second magnetic column 20b have an air gap or are connected to each other, and the other end of the second magnetic column 20b is connected to another cover plate 914.

[0060] Therefore, the first hollow passage 60 of the winding post 912 is connected with the first through holes 70 located on both sides thereof and opposite to each other, the winding post 912 is accommodated in the hollow sleeve 922 of the winding frame 920, the coil 930 is wound around the outer surface of the hollow sleeve 922 and a gap 30 is formed between the outer surface of the hollow sleeve 922 and the convex strips 90, the grooves 40 of each blade 924 are arranged correspondingly to the adjacent second through holes 80, and the projection of each cover plate 914 onto another cover plate 914 covers the convex strips 90 and the blades 924, so that air can pass through the cover plate 914 through the first hollow passage 60, and can pass through the cover plate 914 through the second through holes 80 without being blocked by the convex strips 90, so as to establish an effective air duct, thereby improving the heat dissipation efficiency. In addition, in order to further improve the heat dissipation efficiency, it is possible to consider reducing the number of turns of the coil 930 to reduce the heat source or copper loss and reduce the accumulated heat of the coil 930.

[0061] In summary, in the magnetic core structure of the embodiment of the present application, the first hollow channel of each winding post can be connected with the first through hole located on both sides and opposite to each other, the second hollow channel of the support post can be connected with the third through hole located on both sides and opposite to each other, or the second through hole, the fourth through hole and / or the fifth through hole can be set on the cover plate, so that the air flow channel can be increased, and the heat dissipation area can be increased, so that the magnetic core structure can help cool down when applied to the magnetic element, thereby improving the heat dissipation efficiency. In addition, in the magnetic element of the embodiment of the present application, the first hollow channel of the winding post can be connected with the first through hole located on both sides and opposite to each other, the winding post can be accommodated in the hollow sleeve of the winding frame, the coil can be wound on the outer surface of the hollow sleeve and a gap is formed between the outer surface of the hollow sleeve, the groove of each blade is correspondingly arranged with the adjacent second through hole, and the projection of each cover plate on the other cover plate covers the convex strip and the blade design, so that the air can pass through the cover plate through the first hollow channel, and can pass through the cover plate through the second through hole without being blocked by the convex strip, so as to establish an effective air duct, thereby improving the heat dissipation efficiency.

[0062] Although the present invention is described using the above embodiments, it should be noted that these descriptions are not configured to limit the present invention. On the contrary, this invention covers obvious modifications and similar arrangements that are obvious to those skilled in the art. Therefore, the scope of the claims should be interpreted in the broadest way to include all obvious modifications and similar arrangements.

Claims

1. A magnetic core structure, characterized in that: include: N winding posts, each of which is provided with a first hollow channel, and N is a positive integer; as well as Two cover plates are arranged at both ends of each winding pole, and each cover plate is provided with N first through holes. The N winding poles are arranged one-to-one with the N first through holes of each cover plate, and the first hollow channel of each winding pole is connected with the first through holes located on both sides and opposite to each other.

2. The magnetic core structure according to claim 1, characterized in that: It also includes two support columns, both ends of each support column are connected to the two cover plates, the two support columns are respectively arranged on two side edges of each cover plate, and the N winding columns are arranged between the two support columns.

3. The magnetic core structure according to claim 1 or 2, characterized in that: When N is 1, each of the cover plates is further provided with two second through holes, and the two second through holes are provided at two opposite sides of the first through hole.

4. The magnetic core structure according to claim 3, characterized in that: The cross-sectional area of ​​the first hollow channel and the area of ​​each of the second through holes are both less than or equal to 50% of the cross-sectional area of ​​the winding post.

5. The magnetic core structure according to claim 2, characterized in that: Each of the cover plates is also provided with two third through holes, the two support columns are arranged one-to-one with the two third through holes of each of the cover plates, each of the support columns is provided with a second hollow channel, and the second hollow channel of each of the support columns is connected to the third through holes located on both sides thereof and opposite to each other.

6. The magnetic core structure according to claim 1, characterized in that: When N is greater than or equal to 2, each of the cover plates is provided with a fourth through hole between any two adjacent first through holes.

7. The magnetic core structure according to claim 6, characterized in that: It also includes two support columns, both ends of each support column are connected to the two cover plates, the two support columns are respectively arranged on two side edges of each cover plate, and the N winding columns are arranged between the two support columns.

8. The magnetic core structure according to claim 7, characterized in that: Each of the cover plates is also provided with two third through holes, the two support columns are arranged one-to-one with the two third through holes of each of the cover plates, each of the support columns is provided with a second hollow channel, and the second hollow channel of each of the support columns is connected to the third through holes located on both sides thereof and opposite to each other.

9. The magnetic core structure according to claim 6, characterized in that: Two of the N winding poles are respectively arranged on two side edges of each of the cover plates.

10. The magnetic core structure according to claim 9, characterized in that: When N is equal to 2, each of the cover plates includes a middle area and two side areas located on both sides of the middle area on the surface away from the two winding poles, the middle area corresponds to the fourth through hole, the two side areas correspond to the two first through holes, the edge between the middle area and the two side areas coincides with the tangent or edge of the fourth through hole, the area of ​​the fourth through hole is less than or equal to 80% of the area of ​​the middle area, and the area of ​​each of the first through holes is less than or equal to 80% of the area of ​​the corresponding side area.

11. The magnetic core structure according to claim 9, characterized in that: When N is equal to 2, the outline of the fourth through hole is rectangular, square, elliptical or circular, and the aspect ratio of the fourth through hole is 0.95 to 1.

05.

12. The magnetic core structure according to claim 9, characterized in that: When N is equal to 2, the outline of each of the first through holes is a rectangle or a square, and the aspect ratio of each of the first through holes is 0.95 to 1.

05.

13. The magnetic core structure according to claim 1, characterized in that: When N is greater than or equal to 2, the N first through holes of each cover plate are arranged in a matrix manner, and each cover plate is further provided with a fifth through hole located at the center of the distribution position of the N first through holes.

14. A magnetic element, characterized in that: include: The magnetic core structure according to any one of claims 1 to 13; and N windings are wound on the N winding poles.

15. A magnetic element, characterized in that: include: The magnetic core structure according to claim 3; A winding frame, comprising a hollow sleeve, at least two blades disposed at both ends of the hollow sleeve and at least one convex strip disposed on the outer surface of the hollow sleeve, wherein the winding post is accommodated in the hollow sleeve, and a groove is concavely disposed on the side of each blade, and the groove of each blade is disposed correspondingly to an adjacent second through hole; and a coil, wound around the outer surface and contacting the at least one convex strip, so that a gap is formed between the coil and the outer surface; Wherein, the projection of each cover plate onto another cover plate covers the at least one convex strip and each blade.

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