A magnetic device

Abstract

The application provides a magnetic device, comprising a magnetic core body, the magnetic core body comprising a first magnetic plate, a second magnetic plate, a magnetic column, a first magnetic wall and a second magnetic wall, opposite ends of the magnetic column, the first magnetic wall and the second magnetic wall being connected with the first magnetic plate and the second magnetic plate respectively, and the magnetic column being located between the first magnetic wall and the second magnetic wall, the first magnetic plate and the second magnetic plate being provided with winding holes for winding, and the winding holes being located on the first magnetic plate and the second magnetic plate between the first magnetic wall and the magnetic column and between the second magnetic wall and the magnetic column, so as to form two or more mixed cross magnetic circuits, and improve the heat dissipation performance of the magnetic device.

Description

Technical Field

[0001] This application relates to the field of magnetic device technology, and specifically to a magnetic device. Background Technology

[0002] The structure of magnetic devices mainly consists of a magnetic core and a coil. Leakage inductance integrated transformers are a common type of magnetic device. Leakage inductance integrated transformers are a design that attempts to fully utilize the leakage inductance of the main transformer as a resonant inductor. However, while the leakage inductance generates resonance, it also generates additional losses and heat, resulting in excessive heat generation. Existing magnetic devices cannot dissipate the heat quickly, which in turn affects the performance of the magnetic devices. Summary of the Invention

[0003] In view of this, this application provides a magnetic device to improve the heat dissipation performance of the magnetic device.

[0004] This application provides a magnetic device including a magnetic core body. The magnetic core body includes a first magnetic plate, a second magnetic plate, a magnetic column, a first magnetic wall, and a second magnetic wall. The opposite ends of the magnetic column, the first magnetic wall, and the second magnetic wall are respectively connected to the first magnetic plate and the second magnetic plate, and the magnetic column is located between the first magnetic wall and the second magnetic wall. The first magnetic plate and the second magnetic plate are each provided with a winding hole for winding wires to pass through. The winding hole is located on the first magnetic plate and the second magnetic plate between the first magnetic wall and the magnetic column, and on the first magnetic plate and the second magnetic plate between the second magnetic wall and the magnetic column, so as to form two or more mixed cross magnetic circuits.

[0005] In some embodiments, the first magnetic plate and the second magnetic plate that are not connected to the first magnetic wall and the second magnetic wall are hollow on one side. The magnetic column includes a first magnetic central column and a second magnetic central column connected to the first magnetic central column. The side of the first magnetic central column away from the second magnetic central column is connected to the first magnetic plate, and the side of the second magnetic central column away from the first magnetic central column is connected to the second magnetic plate.

[0006] In some embodiments, the first magnetic wall includes a first magnet and a second magnet connected to the first magnet, wherein the side of the first magnet facing away from the second magnet is connected to the first magnetic plate, and the side of the second magnet facing away from the first magnet is connected to the second magnetic plate.

[0007] In some embodiments, the second magnetic wall includes a third magnet and a fourth magnet connected to the third magnet, wherein the side of the third magnet opposite to the fourth magnet is connected to the first magnetic plate, and the side of the fourth magnet opposite to the third magnet is connected to the second magnetic plate.

[0008] In some embodiments, the magnetic device further includes a first winding and a second winding, the second winding having a different function from the first winding. The first winding is wound on the first magnetic wall through a winding hole located on the first magnetic plate and the second magnetic plate and between the first magnetic wall and the magnetic post. The second winding is wound on the magnetic post, so as to integrate two or more windings with different functions on the same magnetic core body.

[0009] In some embodiments, the magnetic device further includes a third winding, which has a different function from the first winding and the second winding. The third winding is wound around the second magnetic wall through a winding hole located on the second magnetic plate and the first magnetic plate and between the second magnetic wall and the magnetic post.

[0010] In some embodiments, the winding directions of the first winding and the third winding are different from the winding direction of the second winding.

[0011] In some embodiments, the magnetic device further includes a base, the surface of which has a first protruding plate and a second protruding plate. The first end and the second end of the first protruding plate are respectively disposed opposite to the first end and the second end of the second protruding plate to form a fixing notch. The first magnetic plate is engaged in the fixing notch to fix the magnetic core body on the base.

[0012] In some embodiments, the base is provided with a first through hole, a second through hole and a third through hole. The first through hole is located between the end of the first convex plate and the end of the second convex plate and through which the end of the first winding is passed. The second through hole is located on the side of the first convex plate away from the second convex plate and through which the end of the second winding is passed. The third through hole is located between the beginning of the first convex plate and the beginning of the second convex plate and through which the end of the third winding is passed.

[0013] In some embodiments, the first magnetic column, the first magnet, the third magnet, and the first magnetic plate are integrally formed, and the second magnetic column, the second magnet, the fourth magnet, and the second magnetic plate are integrally formed.

[0014] This application provides a magnetic device, including a magnetic core body. The magnetic core body includes a first magnetic plate, a second magnetic plate, a magnetic column, a first magnetic wall, and a second magnetic wall. The opposite ends of the magnetic column, the first magnetic wall, and the second magnetic wall are respectively connected to the first magnetic plate and the second magnetic plate, and the magnetic column is located between the first magnetic wall and the second magnetic wall. The first magnetic plate and the second magnetic plate are each provided with a winding hole for winding wires to pass through. The winding hole is located on the first magnetic plate between the first magnetic wall and the magnetic column, and on the first magnetic plate between the second magnetic wall and the magnetic column, to form two or more mixed cross magnetic circuits to improve the heat dissipation performance of the magnetic device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the magnetic device provided in this application;

[0017] Figure 2 This is a three-dimensional structural diagram of the magnetic core body in the magnetic device provided in this application;

[0018] Figure 3 This is a three-dimensional structural diagram of the base in the magnetic device provided in this application.

[0019] Figure label:

[0020] 10. Magnetic device; 100. Magnetic core body; 110. First magnetic plate; 111. Winding hole; 120. Second magnetic plate; 130. First magnetic center column; 140. Second magnetic center column; 150. First magnet; 160. Second magnet; 170. Third magnet; 180. Fourth magnet; 200. First winding; 300. Second winding; 400. Third winding; 500. Base; 510. Fixing notch; 520. First through hole; 530. Second through hole; 540. Fourth through hole; 550. First protruding plate. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In the absence of conflict, the following embodiments and their technical features can be combined with each other.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise explicitly specified.

[0023] 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 is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "connection," "electrical connection," and "electrical link" as used herein include any direct and indirect electrical or structural connection means. Therefore, if a first device is described herein as coupled / connected / electrically connected to a second device, it means that the first device can be directly electrically / structurally connected to the second device, or indirectly electrically / structurally connected to the second device through other means or connection methods.

[0024] This application provides a magnetic device, including a magnetic core body. The magnetic core body includes a first magnetic plate, a second magnetic plate, a magnetic column, a first magnetic wall, and a second magnetic wall. The opposite ends of the magnetic column, the first magnetic wall, and the second magnetic wall are respectively connected to the first magnetic plate and the second magnetic plate, and the magnetic column is located between the first magnetic wall and the second magnetic wall. The first magnetic plate and the second magnetic plate are each provided with a winding hole for winding wires to pass through. The winding hole is located on the first magnetic plate between the first magnetic wall and the magnetic column, and on the first magnetic plate between the second magnetic wall and the magnetic column, so as to form two or more mixed cross magnetic circuits.

[0025] In this application, by providing winding holes on the first and second magnetic plates of the magnetic core body, the contact area between the magnetic device and the air is increased, and the external airflow can more easily enter the interior of the magnetic core body. This causes the leakage inductance to generate additional losses and heat while resonating, which can be quickly dissipated from the interior of the magnetic core body, thereby improving the heat dissipation efficiency of the magnetic device.

[0026] Please see Figures 1-3 , Figure 1 This is a three-dimensional structural schematic diagram of the magnetic device provided in this application; Figure 2 This is a three-dimensional structural diagram of the magnetic core body in the magnetic device provided in this application; Figure 3This is a three-dimensional structural diagram of the base of the magnetic device provided in this application. This application provides a magnetic device 10, including a magnetic core body 100. The magnetic core body 100 includes a first magnetic plate 110, a second magnetic plate 120, a magnetic column, a first magnetic wall, and a second magnetic wall. The opposite ends of the magnetic column, the first magnetic wall, and the second magnetic wall are respectively connected to the first magnetic plate 110 and the second magnetic plate 120, and the magnetic column is located between the first magnetic wall and the second magnetic wall. The first magnetic plate 110 and the second magnetic plate 120 are each provided with a winding hole 111 for winding wires to pass through. The winding hole 111 is located on the first magnetic plate 110 and the second magnetic plate 120 between the first magnetic wall and the magnetic column and between the second magnetic wall and the magnetic column, so as to form two or more mixed cross magnetic circuits.

[0027] In this application, by providing winding holes 111 on the first magnetic plate 110 and the second magnetic plate 120 of the magnetic core body 100, i.e., by opening winding holes 111 at the bottom and top of the magnetic core body 100, the contact area between the magnetic device 10 and the air is increased, and external airflow can more easily enter the interior of the magnetic core body 100. This allows the additional losses and heat generated by the leakage inductance during resonance to be quickly dissipated from the interior of the magnetic core body 100, thereby improving the heat dissipation efficiency of the magnetic device 10. By opening winding holes 111 on the first magnetic plate 110 and the second magnetic plate 120 of the magnetic core body 100, two or more mixed cross magnetic circuits can be introduced into the same magnetic core body 100, thereby improving the internal heat dissipation efficiency of the magnetic device 100. The more uniform magnetic flux distribution improves the overall utilization rate of the magnetic circuit and the utilization rate of the magnetic core body 100. At the same time, it reduces the portion of the common magnetic circuit, thereby reducing magnetic flux interference in the common magnetic circuit and improving the performance of the magnetic device 10. By opening winding holes 111 on the first magnetic plate 110 and the second magnetic plate 120 of the magnetic core body 100, the magnetic circuit portion with the smallest effective cross-sectional area can undergo magnetic circuit cancellation, thereby reducing the magnetic flux density in that portion. Reducing the magnetic flux density helps to reduce the iron loss of the magnetic device 10, thereby improving energy efficiency. By opening winding holes 111 at the bottom and top of the magnetic core body 10, multiple functions of the magnetic device 10 can be integrated into one device, including but not limited to resonant inductors and filter inductors, thereby improving the utilization rate of the magnetic core body 100.

[0028] In one embodiment, the side of the first magnetic plate 110 and the second magnetic plate 120 not connected to the first magnetic wall and the second magnetic wall is hollow, that is, the side of the first magnetic plate 110 and the second magnetic plate 120 not connected to the first magnetic wall and the second magnetic wall has a hollow structure. The magnetic column includes a first magnetic central column 130 and a second magnetic central column 140 connected to the first magnetic central column 130. The side of the first magnetic central column 130 away from the second magnetic central column 140 is connected to the first magnetic plate 110, and the side of the second magnetic central column 140 away from the first magnetic central column 130 is connected to the second magnetic plate 120. That is, the magnetic column is formed by assembling two parts. By assembling the magnetic column into two parts, the assembly difficulty of the subsequent winding can be reduced, which is convenient for winding or assembly. Furthermore, making the side of the first magnetic plate 110 and the second magnetic plate 120 not connected to the first magnetic wall and the second magnetic wall hollow further facilitates winding or assembly and reduces the manufacturing difficulty of the magnetic device 10.

[0029] In one embodiment, the first magnetic wall includes a first magnet 150 and a second magnet 160 connected to the first magnet 150. The side of the first magnet 150 facing away from the second magnet 160 is connected to a first magnetic plate 110, and the side of the second magnet 160 facing away from the first magnet 150 is connected to a second magnetic plate 120. That is, the first magnetic wall is formed by assembling two parts. By assembling the first magnetic wall into two parts, the assembly difficulty of the subsequent winding can be reduced, thereby further facilitating winding or assembly.

[0030] In one embodiment, the second magnetic wall includes a third magnet 170 and a fourth magnet 180 connected to the third magnet 170. The side of the third magnet 170 facing away from the fourth magnet 180 is connected to the first magnetic plate 110, and the side of the fourth magnet 180 facing away from the third magnet 170 is connected to the second magnetic plate 120. That is, the second magnetic wall is formed by assembling two parts. By assembling the second magnetic wall into two parts, the assembly difficulty of the subsequent winding can be reduced, thereby further facilitating winding or assembly.

[0031] In one embodiment, the magnetic device 10 further includes a first winding 200 and a second winding 300. The function of the second winding 300 is different from that of the first winding 200. The first winding 200 is wound on the first magnetic wall through a winding hole 111 located on the first magnetic plate 110 and the second magnetic plate 120 and located between the first magnetic wall and the magnetic post. The second winding 300 is wound on the magnetic post, so as to integrate two or more windings with different functions on the same magnetic core body 100. Specifically, the first winding 200 is a resonant winding, and the second winding 300 is a main transformer winding. The resonant winding is used to generate a resonant effect and also to improve the selectivity of the circuit and adjust the circuit parameters. The main transformer winding is used to transmit electrical energy, provide a stable output voltage, and withstand current and voltage. Both the first winding 200 and the second winding 300 are formed by winding wires. The wire diameter of the main transformer winding is larger than that of the resonant winding. The wires forming the first winding 200 and the second winding 300 can be round wires or flat wires, etc., which are not limited here. In this embodiment, the example of the wires forming the first winding 200 and the second winding 300 being round wires is used for explanation. One wire passes through the winding hole 111 located on the first magnetic plate 110 and the second magnetic plate 120 and located between the first magnetic wall and the magnetic column, and is wound on the first magnet 150 and the second magnet 160 to form the first winding 200. Another wire is wound on the first magnetic central column 130 and the second magnetic central column 140 to form the second winding 300.

[0032] In this application, through holes are provided at both the top and bottom of the magnetic core body 100, allowing the wires of the first winding 200 to pass through the winding holes 111. This allows the first winding 200 to be wound on the first magnet 150 and the second magnet 160, while the second winding 300 is wound on the magnetic post. This integrates two or more windings with different functions onto the same magnetic core body 100 without requiring additional magnetic cores, such as eliminating the need for a separate resonant magnetic core body 100. This reduces the number of magnetic core bodies 100 and their space requirements, improves the utilization rate and overall performance of the magnetic core body 100, and reduces the volume of the magnetic body. The wire diameter of the second winding 300 is set to be larger than that of the first winding 200. The diameter of the wire in the first winding 200 is reduced to increase the current distribution area on the surface of the wire, thereby more effectively reducing parasitic resistance and losses, i.e., reducing the influence of the skin effect, thus improving resonance performance, making the resonance frequency more stable, and improving the overall circuit efficiency. At the same time, using thinner wires to form the first winding 200 promotes more effective heat dissipation at high frequencies, prevents the first winding 200 from overheating, protects the first winding 200 from damage, and extends the service life of the magnetic device 10. Furthermore, using thinner wires for the first winding 200 can reduce material costs and make it easier to achieve complex shapes and layouts during the winding process, improving the flexibility and manufacturability of the first winding 200.

[0033] In one embodiment, the magnetic device 10 further includes a third winding 400. The third winding 400 has a different function from the first winding 200 and the second winding 300. The third winding 400 is wound around the second magnetic wall through a winding hole 111 located on the second magnetic plate 120 and the first magnetic plate 110, between the second magnetic wall and the magnetic post. Specifically, the third winding 400 can be a resonant winding. The third winding 400 is also formed by winding wire. The diameter of the wire in the second winding 300 is larger than the diameter of the wires in the first winding 200 and the third winding 400. The wire forming the third winding 400 can be a round wire or a flat wire, etc., which is not limited here. In this embodiment, the example of the wire forming the third winding 400 being a round wire is used for explanation. Another wire passes through the winding hole 111 located on the first magnetic plate 110 and the second magnetic plate 120, between the second magnetic wall and the magnetic post, and is wound around the third magnet 170 and the fourth magnet 180 to form the third winding 400. It should be noted that the number of the first winding 200, the second winding 300, and the third winding 400 is not limited to one; there can be multiple windings, such as two, three, or five of each. This is not a limitation; in this embodiment, we will use one of each of the first winding 200, the second winding 300, and the third winding 400 as an example. By winding the third winding 400 on the third magnet 170 and the fourth magnet 180, the utilization rate and overall performance of the magnetic core body 100 are further improved, and the volume of the magnetic body is reduced. Setting the wire diameter of the second winding 300 to be larger than that of the third winding 400 allows for a reduction in the wire diameter of the third winding 400, thereby further reducing parasitic resistance and losses, and further improving heat dissipation performance.

[0034] In one embodiment, the winding directions of the first winding 200 and the third winding 400 are different from the winding direction of the second winding 300. Specifically, the winding directions of the first winding 200 and the third winding 400 are perpendicular to the winding direction of the second winding 300, in order to further improve the magnetic circuit utilization and core utilization, reduce the interference of the common magnetic circuit flux, and reduce the iron loss of the magnetic device 10; optionally, the winding direction of the first winding 200 is opposite to the winding direction of the third winding 400, in order to further improve the magnetic circuit utilization and core utilization, reduce the interference of the common magnetic circuit flux, and reduce the iron loss of the magnetic device 10.

[0035] In one embodiment, the magnetic device 10 further includes a base 500. The surface of the base 500 has a first protruding plate 550 and a second protruding plate. The first and second ends of the first protruding plate 550 are respectively positioned opposite to the first and second protruding plates to form a fixing notch 510. The first magnetic plate 110 engages in the fixing notch 510 to fix the magnetic core body 100 onto the base 500. By setting the base 500, the relative positions of the components can be determined, which is beneficial for mounting the magnetic device 10 on the PCB board. At the same time, by providing the first protruding plate 550 and the second protruding plate on the base 500 to form the fixing notch 510, the first magnetic plate 110 is engaged in the fixing notch 510, improving the connection stability between the two.

[0036] In one embodiment, the base 500 is provided with a first through hole 520, a second through hole 530, and a third through hole. The first through hole 520 is located between the end of the first convex plate 550 and the end of the second convex plate and passes through the end of the first winding 200. The second through hole 530 is located on the side of the first convex plate 550 away from the second convex plate and passes through the end of the second winding 300. The third through hole is located between the beginning of the first convex plate 550 and the beginning of the second convex plate and passes through the end of the third winding 400. In the direction from the magnetic core body 100 toward the base 500, the first convex plate 550 and the second convex plate are shaped like a U-shape. The through holes on the base 500 are respectively provided for passing through the ends of the first winding 200, the second winding 300, and the third winding 400 to fix the ends of the windings and facilitate connection with other components.

[0037] In one embodiment, the first magnetic central column 130, the first magnet 150, the third magnet 170, and the first magnetic plate 110 are integrally formed structures, and the second magnetic central column 140, the second magnet 160, the fourth magnet 180, and the second magnetic plate 120 are integrally formed structures, so as to reduce the risk of loosening of the connection between the various components and thus ensure the reliability of the magnetic device 10.

[0038] In one embodiment, the first magnetic column 130, the first magnet 150, the third magnet 170, and the first magnetic plate 110 form the first magnetic core, and the second magnetic column 140, the second magnet 160, the fourth magnet 180, and the second magnetic plate 120 form the second magnetic core. Both the first and second magnetic cores are E-shaped structures, that is, the first and second magnetic cores are symmetrical structures, or EE type structures, so as to further improve the heat dissipation efficiency of the magnetic device 10, the overall utilization rate of the magnetic circuit, and the utilization rate of the magnetic core body 100, while facilitating the assembly of the magnetic device 10.

[0039] In another embodiment, the first magnetic core and the second magnetic core can be of the EF or ER type structure, so as to further improve the heat dissipation efficiency of the magnetic device 10, the overall utilization rate of the magnetic circuit and the utilization rate of the magnetic core body 100, while facilitating the assembly of the magnetic device 10.

[0040] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, such as the combination of technical features between embodiments, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A magnetic device, characterized by, The magnetic core includes a magnetic core body, a first winding, and a second winding. The magnetic core body includes a first magnetic plate, a second magnetic plate, a magnetic post, a first magnetic wall, and a second magnetic wall. The opposite ends of the magnetic post, the first magnetic wall, and the second magnetic wall are respectively connected to the first magnetic plate and the second magnetic plate, and the magnetic post is located between the first magnetic wall and the second magnetic wall. Both the first magnetic plate and the second magnetic plate are provided with winding holes for winding wires to pass through. The winding holes are located on the first magnetic plate between the first magnetic wall and the magnetic post, and on the second magnetic plate between the second magnetic wall and the magnetic post, to form two or more mixed cross magnetic circuits. The second winding has a different function from the first winding. The first winding passes through the winding holes located on the first magnetic plate and the second magnetic plate and located between the first magnetic wall and the magnetic post and is wound on the first magnetic wall. The second winding is wound on the magnetic post, so as to integrate two or more windings with different functions on the same magnetic core body. The winding directions of the first winding and the second winding are perpendicular.

2. The magnetic device of claim 1, wherein, The first magnetic plate and the second magnetic plate, which are not connected to the first magnetic wall and the second magnetic wall, are hollow on one side. The magnetic column includes a first magnetic central column and a second magnetic central column connected to the first magnetic central column. The side of the first magnetic central column away from the second magnetic central column is connected to the first magnetic plate, and the side of the second magnetic central column away from the first magnetic central column is connected to the second magnetic plate.

3. The magnetic device of claim 2, wherein, The first magnetic wall includes a first magnet and a second magnet connected to the first magnet. The side of the first magnet facing away from the second magnet is connected to the first magnetic plate, and the side of the second magnet facing away from the first magnet is connected to the second magnetic plate.

4. The magnetic device according to claim 3, characterized in that, The second magnetic wall includes a third magnet and a fourth magnet connected to the third magnet. The side of the third magnet facing away from the fourth magnet is connected to the first magnetic plate, and the side of the fourth magnet facing away from the third magnet is connected to the second magnetic plate.

5. The magnetic device according to claim 1, characterized in that, The magnetic device further includes a third winding, which has a different function from the first winding and the second winding. The third winding is wound around the second magnetic wall through the winding hole located between the second magnetic plate and the second magnetic wall, as well as between the first magnetic plate and the magnetic column.

6. The magnetic device according to claim 5, characterized in that, The winding direction of the third winding is perpendicular to the winding direction of the second winding.

7. The magnetic device according to claim 5, characterized in that, The magnetic device further includes a base, the surface of which has a first protruding plate and a second protruding plate. The first and second ends of the first protruding plate are respectively disposed opposite to the first and second ends of the second protruding plate to form a fixing notch. The first magnetic plate is engaged in the fixing notch to fix the magnetic core body on the base.

8. The magnetic device according to claim 7, characterized in that, The base is provided with a first through hole, a second through hole and a third through hole. The first through hole is located between the end of the first convex plate and the end of the second convex plate and a wire end of the first winding is passed through it. The second through hole is located on the side of the first convex plate away from the second convex plate and a wire end of the second winding is passed through it. The third through hole is located between the beginning of the first convex plate and the beginning of the second convex plate and a wire end of the third winding is passed through it.

9. The magnetic device according to claim 4, characterized in that, The first magnetic central column, the first magnet, the third magnet, and the first magnetic plate are integrally formed structures, as are the second magnetic central column, the second magnet, the fourth magnet, and the second magnetic plate.

Images