An LLC magnetic integrated transformer

Abstract

This utility model discloses an LLC magnetic integrated transformer. By setting a second magnetic core at the input or output end of the primary coil to form a filter, the negative impact of abnormal input current changes on the circuit is reduced. It includes: a first magnetic core, which comprises a mounting base, a second mounting base, a mounting post, and a connector. One end of the mounting post is connected to the first mounting base, and the other end is connected to the second mounting base. The connector is symmetrically arranged on both sides of the mounting post, with one end connected to the first mounting base and the other end connected to the second mounting base. There is an installation space between the connector and the mounting post; a coil assembly, comprising a primary coil and a secondary coil, which are coaxially fitted together to form an annular body with an inner hole. The coil assembly is mounted on the first magnetic core, wherein the mounting post is inserted into the inner hole of the coil assembly, and the annular body portion of the coil assembly passes through and is embedded in the installation space; and a second magnetic core, which is annular, and the input or output end of the primary coil is wound around the second magnetic core.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to an LLC magnetic integrated transformer. Background Technology

[0002] In recent years, with the rapid development of the new energy vehicle and photovoltaic energy storage industries, the large-scale demand for high-end consumer electronics, car charging piles, and other switching power supply applications has made power, efficiency, and cost key concerns. The miniaturization, integration, and high performance of power modules are constantly evolving, placing higher demands on the electronic components used. Improving the efficiency of electronic components within the module and reducing heat generation are crucial to achieving these goals. The performance characteristics of LLC magnetically integrated high-frequency transformers cleverly solve the correlation problem, fully meeting application requirements.

[0003] To address the miniaturization and low temperature rise requirements of magnetic components in high-power power supplies, a suitable LLC magnetic integrated transformer has been developed. It is a small, high-efficiency plug-in electronic component that integrates resonance and transformer, suitable for wave soldering, and can be applied to high-power equipment applications such as charging piles and base stations.

[0004] The current problem is that the current frequency can fluctuate abnormally due to various reasons. These abnormal fluctuations have negative effects on the circuit, such as overcurrent. Secondly, the products are generally large in size, and there is room for further optimization in terms of structure. Utility Model Content

[0005] The purpose of this invention is to propose an LLC magnetic integrated transformer that reduces the negative impact of abnormal changes in input current on the circuit by setting a magnetic core two-formed filter at the input or output end of the primary coil.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An LLC magnetic integrated transformer includes: a magnetic core one, which includes a mounting base one, a mounting base two, a mounting post, and a connector. One end of the mounting post is connected to the mounting base one, and the other end is connected to the mounting base two. The connector is symmetrically arranged on both sides of the mounting post, with one end connected to the mounting base one and the other end connected to the mounting base two. There is an installation space between the connector and the mounting post. A coil assembly includes a primary coil and a secondary coil, which are coaxially fitted together to form an annular body with an inner hole. The coil assembly is disposed on the magnetic core one, wherein the mounting post is inserted into the inner hole of the coil assembly, and the annular body portion of the coil assembly passes through and is embedded in the installation space. A magnetic core two is annular, and the input or output end of the primary coil is wound around the magnetic core two.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the mounting column is cylindrical, the side of the connector closer to the mounting column is arc-shaped, and the mounting base one, the mounting column, the mounting base two, and the connector together form a fan-shaped mounting space.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the mounting column includes column body one and column body two, the connecting body includes connecting part one and connecting part two, column body one and connecting part one are disposed on the mounting base one, column body two and connecting part two are disposed on the mounting base two, when the mounting base one and the mounting base two are facing each other, the connecting part one mates with the connecting part two to form the connecting body, and the column body one mates with the column body two to form the mounting column.

[0010] Based on the above solution and as a preferred embodiment of the above solution: the first connecting part and the second connecting part are bonded together by adhesive; the first column and the second column are bonded together by adhesive.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: a coil four is wound on the magnetic core two.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: a mounting plate is provided on the bottom side of the mounting base one, and a plurality of insertion holes are provided on the outer side of the mounting plate. The mounting base one and the mounting plate are bonded together by fixing adhesive.

[0013] This utility model has the following beneficial effects:

[0014] The LLC magnetic integrated transformer of this invention reduces the negative impact of abnormal changes in input current on the circuit, such as overcurrent, by setting a magnetic core at the input or output end of the primary coil to form a filter.

[0015] Secondly, by optimizing the structure of the magnetic core and coil group, as well as the assembly structure of the magnetic core and coil group, the LLC magnetic integrated transformer has a more compact structure, further reducing the product size.

[0016] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the LLC magnetic integrated transformer structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the coil assembly of this utility model;

[0019] Figure 3 This is an exploded view of the LLC magnetic integrated transformer assembly of this utility model. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0021] See Figure 1-3 This utility model discloses an LLC magnetic integrated transformer.

[0022] In the embodiments of this disclosure, such as Figure 1 and Figure 3 As shown, the LLC magnetic integrated transformer includes magnetic core 100, coil group 700, and magnetic core 501.

[0023] Among them, magnetic core 100, etc. Figure 3 As shown, the magnetic core 100 includes a mounting base 101, a mounting base 102, a mounting post 105, and a connector 108. One end of the mounting post 105 is connected to the mounting base 101, and the other end is connected to the mounting base 102. The connector 108 is symmetrically arranged on both sides of the mounting post 105. One end of the connector 108 is connected to the mounting base 101, and the other end is connected to the mounting base 102. There is an installation space 109 between the connector 108 and the mounting post 105.

[0024] Among them, coil group 700 Figure 2 As shown, it includes a primary coil and a secondary coil, which are coaxially fitted together to form an annular body 702 with an inner hole 701. The coil assembly 700 is disposed on the magnetic core 100, wherein the mounting post 105 is inserted into the inner hole 701 of the coil assembly 700, and part of the annular body 702 of the coil assembly 700 passes through and is embedded in the mounting space 109.

[0025] Among them, magnetic core 2501, such as Figure 1 and Figure 2 As shown, magnetic core 501 is ring-shaped. The input or output end of the primary coil is wound around magnetic core 501. The winding method includes, but is not limited to, directly passing through the inner ring of magnetic core 501, or winding one or more turns on magnetic core 501.

[0026] The LLC magnetic integrated transformer of this invention forms a filter 500 by setting a magnetic core 501 at the input or output end of the primary coil, thereby reducing the negative impact of abnormal changes in input current on the circuit, such as overcurrent, and ensuring the stability of system performance.

[0027] Secondly, by optimizing the structure of the magnetic core 100 and the coil group 700, as well as the assembly structure of the magnetic core 100 and the coil group 700, the structure of this LLC magnetic integrated transformer is made more compact, further reducing the product size.

[0028] In this embodiment, the mounting post 105 is cylindrical, and the side of the connector 108 closest to the mounting post 105 is arc-shaped. The mounting base 101, mounting post 105, mounting base 102, and connector 108 together form a fan-shaped mounting space 109. The fan-shaped mounting space 109, together with the circular mounting post 105, forms a perfect fit for the coil assembly 700. While making the structure more compact to reduce volume, it also optimizes the magnetic conductivity, improves the conversion efficiency, and reduces energy loss.

[0029] In this embodiment, to optimize the assembly process during product manufacturing, the following measures are taken: firstly, to reduce the manufacturing difficulty of the magnetic core 100; and secondly, to reduce the assembly difficulty between the magnetic core 100 and the coil assembly 700. The mounting post 105 includes a first post 103 and a second post 104, and the connector 108 includes a first connecting part 106 and a second connecting part 107. The first post 103 and the first connecting part 106 are mounted on the first mounting base 101, and the second post 104 and the second connecting part 107 are mounted on the second mounting base 102. When the first mounting base 101 and the second mounting base 102 are aligned, the first connecting part 106 aligns with the second connecting part 107 to form the connector 108, and the first post 103 aligns with the second post 104 to form the mounting post 105. During assembly, the first connecting part 106 and the second connecting part 107 are bonded together with adhesive; the first post 103 and the second post 104 are also bonded together with adhesive.

[0030] It is worth noting that, in order to optimize the structure, the coil group 700 of this embodiment adopts a primary coil and a secondary coil that are interlocked and nested into a whole.

[0031] In some embodiments, the coil group 700 includes three coils: coil one 200, coil two 300, and coil three 400. The wire of coil one 200 passes through the mounting space 109 and is spirally wound along the length direction of the mounting post 105. The wire of coil two 300 passes through the mounting space 109 and is spirally wound along the length direction of the mounting post 105, and coil two 300 surrounds the outside of coil one 200. The wire of coil three 400 passes through the mounting space 109 and is spirally wound along the length direction of the mounting post 105, and coil three 400 surrounds the outside of coil two 300. Coil one 200 is the primary coil, and coil two 300 and coil three 400 together form an independent secondary coil.

[0032] In the embodiments of this disclosure, such as Figure 2As shown, a coil 502 is wound on the magnetic core 2 501. The leads at both ends of the coil 502 can be connected to a processor unit, such as a processor unit equipped with an SM16028E chip. The coil 502 and the wires wound around the primary coil of the magnetic core 2 501 form mutual inductance. Therefore, the change in current of the primary coil can cause a corresponding change in current or voltage of the coil 502. The processor unit reads the change in current or voltage of the leads at both ends of the coil 502. The processor unit obtains the current or voltage change information of the coil 502. Generally, the current information is identified and used to adjust the duty cycle.

[0033] In this embodiment, a mounting plate 600 is provided on the bottom side of the mounting base 101, and a plurality of insertion holes 601 are provided on the outer side of the mounting plate 600. The mounting base 101 and the mounting plate 600 are bonded together with adhesive. Then, the ends of the leads (input and output lines) of the primary coil and the secondary coil are passed through the insertion holes 601 to form auxiliary fixation. At the same time, the protruding part of the lead can be directly used as a pin during installation and application.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An LLC magnetically integrated transformer, characterized by, include: A magnetic core (100) includes a mounting base (101), a mounting base (102), a mounting post (105), and a connector (108). One end of the mounting post (105) is connected to the mounting base (101), and the other end is connected to the mounting base (102). The connector (108) is symmetrically arranged on both sides of the mounting post (105). One end of the connector (108) is connected to the mounting base (101), and the other end is connected to the mounting base (102). There is an installation space (109) between the connector (108) and the mounting post (105). A coil assembly (700) includes a primary coil and a secondary coil, which are coaxially fitted together to form an annular body (702) with an inner hole (701). The coil assembly (700) is disposed on the magnetic core (100). The mounting post (105) is inserted into the inner hole (701) of the coil assembly (700), and a portion of the annular body (702) of the coil assembly (700) passes through and is fitted into the mounting space (109). Magnetic core two (501) is ring-shaped, and the input or output end of the primary coil is wound around the magnetic core two (501).

2. The LLC magnetic integrated transformer of claim 1, wherein, The mounting post (105) is cylindrical, and the side of the connector (108) closest to the mounting post (105) is arc-shaped. The mounting base one (101), the mounting post (105), the mounting base two (102), and the connector (108) together form a fan-shaped mounting space (109).

3. The LLC magnetic integrated transformer according to claim 1 or 2, characterized in that, The mounting post (105) includes a first post (103) and a second post (104). The connecting body (108) includes a first connecting part (106) and a second connecting part (107). The first post (103) and the first connecting part (106) are disposed on the first mounting base (101). The second post (104) and the second connecting part (107) are disposed on the second mounting base (102). When the first mounting base (101) and the second mounting base (102) are facing each other, the first connecting part (106) mates with the second connecting part (107) to form the connecting body (108), and the first post (103) mates with the second post (104) to form the mounting post (105).

4. The LLC magnetic integrated transformer of claim 3, wherein, The first connecting part (106) and the second connecting part (107) are bonded together by adhesive; the first column (103) and the second column (104) are bonded together by adhesive.

5. The LLC magnetically integrated transformer of claim 1, wherein, The magnetic core two (501) is wound with coil four (502).

6. The LLC magnetically integrated transformer of claim 1, wherein, The mounting base (101) has a mounting plate (600) on its bottom side. The mounting plate (600) has several insertion holes (601) on its outer side. The mounting base (101) and the mounting plate (600) are bonded together by adhesive.

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