An interleaved LLC power supply synchronous rectification component

Abstract

The present invention relates to the technical field of synchronous rectification, and specifically relates to an interleaved LLC power supply synchronous rectification component, which includes two transformers, a full-bridge synchronous rectification switch, a phase-shifted modulation switch, a water-cooled radiator, a riser, a magnetic core fixing bracket, and a copper-based circuit board; the transformers are distributed at both ends of the interleaved LLC power supply synchronous rectification component, and the secondary windings of the two transformers are connected in series in the middle of the interleaved LLC power supply synchronous rectification component; the full-bridge synchronous rectification switch is evenly and symmetrically attached to the copper-based circuit board, and the copper-based circuit board is placed in the center of the interleaved LLC power supply synchronous rectification component; the transformers and the copper-based circuit board are arranged above the water-cooled radiator through the riser. The present invention combines rational layout, water-cooled heat dissipation and transformer structure optimization into one, the overall structure of the device is compact and the layout is reasonable. Under the action of the water-cooled heat dissipation structure, it can evenly take away the heat generated by the power supply, and the power supply has high reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of synchronous rectification, and specifically to an interleaved LLC power supply synchronous rectification component. Background Art

[0002] In application fields with low-voltage and high-current output, such as communication power supplies, electroplating power supplies, hydrogen production power supplies, sewage treatment power supplies, arc smelting power supplies, etc., synchronous rectification technology has been widely used. In application fields with relatively low output voltage and particularly large output current, such as electroplating power supplies, the synchronous rectification efficiency still needs to be further explored. At the same time, the large current output requires the secondary winding of the transformer and the output line to use conductors with a large cross-sectional area, and the connection method and layout of the conductors have a great impact on the reliability of the system.

[0003] In traditional solutions, the main solutions are divided into the following categories:

[0004] (1) Optimize the device layout and adopt a heat dissipation method combining water cooling and air cooling to improve the system heat dissipation performance. For example, in the utility model patent with the application number 202220281202.8, a power supply component and an electroplating power supply are disclosed. The heat generated inside the power supply component is dissipated through a combination of air cooling and water cooling. At the same time, the water cooling and air cooling are arranged alternately, and the components are evenly distributed for heat dissipation, which can improve the overall performance and integration of the power supply. However, this solution has the following deficiencies: 1. This solution is based on a Schottky diode rectification system. The Schottky barrier diode has a forward voltage drop of 0.6V during operation, while the ordinary one reaches 1.2V. When outputting a large current, the conduction loss is large, reducing the efficiency of the power supply. 2. The water cooling structure is perpendicular to the plane. Each water cooling structure uses a radiator with a microchannel with a diameter of 10 - 1000 microns and can only use ultrapure water, otherwise it is easy to be blocked. 3. In general application scenarios, the air is acidic. Using the air cooling method is likely to cause internal components to be corroded. At the same time, adding a fan increases the space and cost.

[0005] (2) Optimize the transformer structure. For example, in the utility model patent with the application number 200520068066.0, a high-frequency transformer for electroplating power supply is disclosed. The primary winding is wound around a ferrite core, and the radiator serves as the installation base for the entire structure and the positive electrode of the power supply. The anodes of a group of common-cathode rectifier diode modules are connected together by a copper plate, and pass through a shaped copper bar through the annular ferrite core around which the primary winding of the high-frequency transformer is wound and connected to the common negative electrode, forming the secondary winding and rectifier circuit of the high-frequency transformer. This structure is compact and simple, and has the advantages of reducing leakage inductance and insulation compared with water-cooled copper tubes. However, this connection structure has the following deficiencies: 1. Screws are used to connect the copper sheet and the copper bar in this structure, and the number of connections is large. When passing a large current, the temperature at the contact points is likely to be too high, resulting in uneven heat dissipation, and the contact points are also easily oxidized to form copper oxide, resulting in an increase in contact resistance and thus a local overheating. 2. An annular ferrite core is used and stands on the radiator together with the secondary winding copper bar, and the radiator is not fully utilized to take away heat. 3. This structure requires fixed connections in many places, the installation is complex, the production efficiency is not high, and the proportion of copper bar use is large, resulting in too high costs.

[0006] A horizontal low-voltage large-current transformer structure is also applicable to the field of electroplating power supply. For example, in the utility model patent with the application number 201920636350.5, a low-voltage large-current transformer structure is disclosed. The primary and secondary of two skeletons are separated, and the secondary winding is a U-shaped copper sheet. The structure is simple. Compared with the copper bar special-shaped connection, the overall structure is compact and the manufacturing cost is low. However, this structure also has the following deficiencies: 1. For a structure that requires cascaded output of multiple transformers, the shaped U-shaped secondary winding structure is not applicable. 2. When increasing the air gap in this core structure, since the air gap is located in the middle of the core, the diffusion magnetic flux acts on the winding, and the eddy current loss cannot be ignored. 3. The primary winding and secondary winding of the transformer are wound separately, which will cause too large leakage magnetic flux, and it is difficult to adjust the leakage inductance parameters according to the required resonant inductance.

[0007] In summary, although the existing technologies can improve the performance and efficiency of electroplating power supplies to a certain extent, there are problems such as increased costs, decreased power density, increased complexity of the power supply structure, and inability to adjust leakage inductance, which limit the popularization and application of these technical solutions. Summary of the Invention

[0008] To avoid the above problems existing in the prior art, the purpose of the present invention is to provide an interleaved LLC power supply synchronous rectification component to solve the problems of high energy consumption, low efficiency, large volume, high cost, etc. in the medium and high power applications of traditional electroplating power supplies, and also has the characteristics of simple structure, uniform heat dissipation, and adjustable leakage inductance.

[0009] To achieve the above object, the present invention provides the following technical solutions: An interleaved LLC power supply synchronous rectification component, comprising two transformers, a full-bridge synchronous rectification switch, a water-cooled radiator, a riser, a magnetic core fixing bracket, and a copper-based circuit board;

[0010] The transformers are distributed at both ends of the interleaved LLC power supply synchronous rectification component, and the secondary windings of the two transformers are connected in series in the middle of the interleaved LLC power supply synchronous rectification component; The full-bridge synchronous rectification switch is evenly and symmetrically attached to the copper-based circuit board, and the copper-based circuit board is placed in the center of the interleaved LLC power supply synchronous rectification component; The transformers and the copper-based circuit board are arranged above the water-cooled radiator through the riser, and the phase-shifted modulation switch is evenly arranged at the bottom of the water-cooled radiator.

[0011] The present invention is further configured as: The interleaved LLC power supply synchronous rectification component further includes a first copper block and a second copper block, the first copper block and the second copper block are respectively arranged at the upper and lower ends of the copper-based circuit board, and the first copper block and the second copper block are respectively the positive input terminal and the negative input terminal after rectification of the interleaved LLC power supply synchronous rectification component;

[0012] The interleaved LLC power supply synchronous rectification component further includes a third copper block and a fourth copper block, the third copper block and the fourth copper block are respectively arranged at the left and right ends of the copper-based circuit board.

[0013] The present invention is further configured as: The two transformers are two transformers with opposite same-named terminals, including a first transformer and a second transformer; The secondary windings of the first transformer and the second transformer are connected in series, and the same-named terminals are opposite.

[0014] The present invention is further configured as: The magnetic core structure of the transformer is a UI type, the magnetic core structure includes two magnetic core side columns, and the two magnetic core side columns of the magnetic core structure of the first transformer are respectively sleeved with a first skeleton and a second skeleton, and the first skeleton and the second skeleton are parallel to each other;

[0015] The two magnetic core side columns of the magnetic core structure of the second transformer are respectively sleeved with a third skeleton and a fourth skeleton, and the third skeleton and the fourth skeleton are parallel to each other.

[0016] The present invention is further configured as: The primary winding of the first transformer is wound around the first skeleton and the second skeleton at the same time; The primary winding of the second transformer is wound around the third skeleton and the fourth skeleton at the same time.

[0017] The present invention is further configured as: The secondary winding of the first transformer passes through one magnetic core side column around which the primary winding of the first transformer is wound, and is connected to one magnetic core side column around which the primary winding of the second transformer is wound, respectively forming the secondary winding structures of the two transformers.

[0018] The present invention is further configured as follows: the secondary winding structure is composed of multiple layers of thin copper sheets. The bottom layer of the secondary winding is attached to the water-cooled radiator and is placed under the copper-based circuit board. After the head and tail ends of the secondary winding structure pass through the magnetic core side columns of the first transformer and the second transformer, they are respectively buckled onto the third copper block and the fourth copper block on the copper-based circuit board, and the secondary winding structure is connected to the third copper block and the fourth copper block with screws, serving as the positive output terminal and the negative output terminal of the interleaved LLC power supply synchronous rectification component.

[0019] The present invention is further configured as follows: the first transformer and the second transformer have the same design parameters. By adjusting the turn ratio of the primary windings of the two magnetic core side columns of each transformer, the magnitude of the leakage magnetic flux between the primary and secondary windings is adjusted, thereby realizing the adjustment of the leakage inductance of the transformer.

[0020] The present invention is further configured as follows: the power supply structure of the interleaved LLC power supply synchronous rectification component adopts the full-bridge synchronous rectification technology. The full-bridge synchronous rectification switches include at least four, and the full-bridge synchronous rectification switches are arranged at equal intervals in an array on the upper and lower sides of the copper-based circuit board.

[0021] The present invention is further configured as follows: the interleaved LLC power supply synchronous rectification component further includes a magnetic core fixing frame, which is connected to the heightening frame and buckled on the magnetic core structure of the transformer.

[0022] An interleaved LLC power supply synchronous rectification component proposed by the present invention is a power supply structure that combines a rational layout + water-cooled heat dissipation and simultaneous optimization of the transformer structure. It mainly includes two transformers with opposite-phase same-name terminals, a phase-shift modulation switch module, a full-bridge synchronous rectification switch module, a water-cooled radiator, a copper-based circuit board, a heightening frame, a fixing frame, etc. Among them, the two transformers with opposite-phase same-name terminals are distributed at both ends of the power supply component, and their secondary windings are connected in series in the middle. The full-bridge synchronous rectification switch tubes are evenly and symmetrically attached to the copper-based circuit board and placed in the center of the power supply component. The phase-shift modulation switch module is evenly placed at the bottom of the water-cooled radiator. By reasonably placing each component and optimizing the transformer structure, the water-cooled heat dissipation method is used to evenly take away the heat generated by the power supply component, so as to improve the performance and reliability of the power supply.

[0023] In summary, the beneficial effects of the above technical solutions of the present invention are as follows:

[0024] 1. The present invention provides an interleaved LLC power supply synchronous rectification component, which combines a rational layout + water-cooled heat dissipation and optimization of the transformer structure. It mainly includes two transformers with opposite-phase same-name terminals, a phase-shift modulation switch module, a full-bridge synchronous rectification switch module, a water-cooled radiator, a copper-based circuit board, a heightening frame, a fixing frame, etc. It has a compact structure and a reasonable layout. Under the action of the water-cooled heat dissipation structure, it can evenly take away the heat generated by the power supply, and the power supply has high reliability.

[0025] 2. The present invention provides a connection method of a transformer in an interleaved LLC power supply synchronous rectification module. The primary winding of the high-frequency transformer is wound on two parallel bobbins on both sides of the transformer at the same time. The secondary winding is connected to the bobbin of a magnetic core side column of another high-frequency transformer with a primary winding wound thereon through a copper sheet passing through the bobbin of a magnetic core side column with the primary winding of the transformer wound thereon, respectively forming the secondary windings of the two high-frequency transformers and their series structure. Using a simple transformer connection method as the output can meet the power output requirements with a small amount of copper used. At the same time, compared with using a shaped copper busbar, using a copper braid or multiple thin copper sheets is also more conducive to processing and reducing the volume. Therefore, the present invention has the advantages of low cost, small volume, high power density, etc.

[0026] 3. The present invention adopts a phase-shifted modulation interleaved LLC + synchronous rectification method. This method has the advantages of high efficiency and good reliability. At the same time, with this structure, there is no voltage spike at the secondary output. In the case of low voltage and large current at the secondary, MOS transistors with a low breakdown voltage can be used. Therefore, the present invention has the advantages of high efficiency, good reliability, low voltage stress, low cost, etc.

[0027] 4. Compared with the traditional electroplating power supply structure, the present invention provides a transformer winding structure with adjustable leakage inductance, which can help realize the integration and adjustment of the resonant inductance, further reduce the volume of the power supply, and improve the power density of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic diagram of the overall structure of the interleaved LLC power supply synchronous rectification module described in the present invention.

[0030] Figure 2 It is a bottom view of the interleaved LLC power supply synchronous rectification module described in the present invention.

[0031] Figure 3 It is a topological structure diagram of the phase-shifted modulation interleaved LLC circuit described in the embodiments of the present invention.

[0032] Figure 4 It is a schematic diagram of the connection of the transformer windings in the embodiments of the present invention.

[0033] Figure 5 It is a schematic diagram of the transformer connection structure in the embodiments of the present invention.

[0034] Figure 6This is the disassembly diagram of the transformer in the embodiment of the present invention.

[0035] Figure 7 This is the layout diagram of the full-bridge synchronous rectification switch module in the embodiment of the present invention.

[0036] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0037] 1. Secondary winding structure, 11. First transformer secondary winding, 12. Second transformer secondary winding, 21. U-shaped part of the first transformer core structure, 22. U-shaped part of the second transformer core structure, 31. First skeleton, 32. Third skeleton, 41. First transformer primary winding, 42. Second transformer primary winding, 51. Second skeleton, 52. Fourth skeleton, 61. I-shaped part of the first transformer core structure, 62. I-shaped part of the second transformer core structure, T1. First transformer, T2. Second transformer, H1. First elevation frame, H2. Second elevation frame, H3. Third elevation frame, H4. Fourth elevation frame, H5. Fifth elevation frame, H6. Sixth elevation frame, S1. First phase-shifting modulation switch, S2. Second phase-shifting modulation switch, S3. Third phase-shifting modulation switch, S4. Fourth phase-shifting modulation switch, Q1. First full-bridge synchronous rectification switch, Q2. Second full-bridge synchronous rectification switch, Q3. Third full-bridge synchronous rectification switch, Q4. Fourth full-bridge synchronous rectification switch, Cu1. First copper block, Cu2. Second copper block, Cu3. Third copper block, Cu4. Fourth copper block, I1. First core fixing bracket, I2. Second core fixing bracket, I3. Third core fixing bracket, I4. Fourth core fixing bracket, B. Copper-based circuit board, R. Water-cooled radiator. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the attached drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without making creative efforts shall all fall within the scope of protection of this application.

[0039] The present invention will be further described below in conjunction with the attached drawings and preferred embodiments.

[0040] Embodiment:

[0041] As Figures 1-6 shown, this is a preferred embodiment of the present invention, an interleaved LLC power supply synchronous rectification component,

[0042] The interleaved LLC power supply synchronous rectification component proposed by the present invention is based on a phase-shifting modulation interleaved LLC circuit topology scheme, as Figure 3 shown.

[0043] AsFigures 1-2 As shown, the interleaved LLC power supply synchronous rectification component includes two transformers, a full-bridge synchronous rectification switch, a water-cooled radiator, a heightening bracket H, and a copper-based circuit board;

[0044] The transformers are distributed at both ends of the interleaved LLC power supply synchronous rectification component, and the secondary winding structures 1 of the two transformers are connected in series in the middle of the interleaved LLC power supply synchronous rectification component; the full-bridge synchronous rectification switch is evenly and symmetrically attached to the copper-based circuit board B, and the copper-based circuit board B is placed in the center of the interleaved LLC power supply synchronous rectification component; the transformers and the copper-based circuit board B are arranged above the water-cooled radiator R through the heightening bracket, and the phase-shift modulation switches are evenly arranged at the bottom of the water-cooled radiator R.

[0045] As Figure 1 shown, the heightening bracket includes a first heightening bracket H1, a second heightening bracket H2, a third heightening bracket H3, a fourth heightening bracket H4, a fifth heightening bracket H5, and a sixth heightening bracket H6; the first heightening bracket H1 and the sixth heightening bracket H6 are arranged at the bottom of the first transformer T1 for raising the first transformer T1; the second heightening bracket H2 and the fifth heightening bracket H5 are arranged at the bottom of the copper-based circuit board B; the third heightening bracket H3 and the fourth heightening bracket H4 are arranged at the bottom of the second transformer T2.

[0046] As Figure 2 shown, the phase-shift modulation switches include a first phase-shift modulation switch S1, a second phase-shift modulation switch S2, a third phase-shift modulation switch, and a third phase-shift modulation switch S4; the phase-shift modulation switches are evenly arranged at the bottom of the water-cooled radiator R.

[0047] The interleaved LLC power supply synchronous rectification component further includes a first copper block Cu1 and a second copper block Cu2, the first copper block Cu1 and the second copper block Cu2 are respectively arranged at the upper and lower ends of the copper-based circuit board B, and the first copper block Cu1 and the second copper block Cu2 are respectively the positive input end and the negative input end after rectification of the interleaved LLC power supply synchronous rectification component;

[0048] The interleaved LLC power supply synchronous rectification component further includes a third copper block Cu3 and a fourth copper block Cu4, the third copper block Cu3 and the fourth copper block Cu4 are respectively arranged at the left and right ends of the copper-based circuit board B.

[0049] As Figures 5-6 shown, the two transformers are two transformers with opposite same-named terminals, including a first transformer T1 and a second transformer T2; the secondary windings of the first transformer T1 and the second transformer T1 are connected in series, and the same-named terminals are opposite.

[0050] The magnetic core structure of the transformer is of the UI type, including a U-shaped part and an I-shaped part. The I-shaped part of each magnetic core structure is close to the U-shaped part, and the air gap of the transformer can be set by adjusting the distance between the I-shaped part and the U-shaped part, so as to adjust the relevant parameters of the transformer.

[0051] The magnetic core structure includes two magnetic core side columns. The first skeleton 31 and the second skeleton 51 are respectively sleeved on the two magnetic core side columns of the U-shaped part 21 of the first transformer magnetic core structure. The first skeleton 31 and the second skeleton 51 are parallel to each other; the I-shaped part 61 of the first transformer magnetic core structure is close to the U-shaped part 21 of the first transformer magnetic core structure.

[0052] The third skeleton 32 and the fourth skeleton 52 are respectively sleeved on the two magnetic core side columns of the U-shaped part 22 of the second transformer magnetic core structure. The third skeleton 32 and the fourth skeleton 52 are parallel to each other. The I-shaped part 62 of the second transformer magnetic core structure is close to the U-shaped part 22 of the second transformer magnetic core structure.

[0053] The primary winding 41 of the first transformer is wound around the first skeleton 31 and the second skeleton 51 at the same time; the primary winding 42 of the second transformer is wound around the third skeleton 32 and the fourth skeleton 52 at the same time.

[0054] The secondary winding 11 of the first transformer passes through one magnetic core side column around which the primary winding 41 of the first transformer is wound and is connected to one magnetic core side column around which the primary winding 42 of the second transformer is wound, respectively forming the secondary winding structures 1 of the two transformers.

[0055] The secondary winding structure 1 is a multi-layer thin copper sheet. The bottom layer of the secondary winding is attached to the water-cooled radiator R and is placed under the copper-based circuit board B. After the head and tail ends of the secondary winding structure 1 pass through the magnetic core side columns of the first transformer T1 and the second transformer T2, they are respectively buckled onto the third copper block Cu3 and the fourth copper block Cu4 on the copper-based circuit board B, and the secondary winding structure 1 is connected to the third copper block Cu3 and the fourth copper block Cu4 with screws, serving as the positive output end and the negative output end of this interleaved LLC power synchronous rectification component.

[0056] That is, the primary winding of the transformer is wound around two parallel skeletons on both sides of the transformer at the same time. The secondary winding passes through the skeleton of one magnetic core side column around which the primary winding of the transformer is wound and is connected to the skeleton of one magnetic core side column around which the primary winding of another high-frequency transformer is wound, respectively forming the secondary winding of the two high-frequency transformers and its series structure. The schematic diagram of the transformer winding connection is as Figure 4 shown.

[0057] The design parameters of the first transformer T1 and the second transformer T2 are the same. By adjusting the turns ratio of the primary windings on the magnetic core side columns of the transformer, the magnitude of the leakage flux between the primary and secondary sides is adjusted, so as to realize the adjustment of the leakage inductance of the transformer.

[0058] As Figure 7 shown, the power supply structure of the interleaved LLC power supply synchronous rectification component adopts the full-bridge synchronous rectification technology. The full-bridge synchronous rectification switches include at least four. In this embodiment, four full-bridge synchronous rectification switches are adopted, including the first full-bridge synchronous rectification switch Q1, the second full-bridge synchronous rectification switch Q2, the third full-bridge synchronous rectification switch Q3, and the fourth full-bridge synchronous rectification switch Q4. The full-bridge synchronous rectification switches are arranged at equal intervals in an array on the upper and lower sides of the copper-based circuit board.

[0059] The interleaved LLC power supply synchronous rectification component further includes a magnetic core fixing frame, which is connected to the height increasing frame and buckled on the magnetic core structure of the transformer.

[0060] As Figure 1 shown, the magnetic core fixing frame includes the first magnetic core fixing frame I1, the second magnetic core fixing frame I2, the third magnetic core fixing frame I3, and the fourth magnetic core fixing frame I4. The first magnetic core fixing frame I1 is connected to the first height increasing frame H1 and buckled on the magnetic core on the upper side of the first transformer T1 to play a fixing role. Similarly, the fourth magnetic core fixing frame I4 is connected to the sixth height increasing frame H6 and buckled on the magnetic core on the lower side of the first transformer T1 to play a fixing role.

[0061] The second magnetic core fixing frame I2 is connected to the third height increasing frame H3 and buckled on the magnetic core on the upper side of the second transformer T2 to play a fixing role. The third magnetic core fixing frame I3 is connected to the fourth height increasing frame H4 and buckled on the magnetic core on the lower side of the second transformer T2 to play a fixing role.

[0062] In summary, an interleaved LLC power supply synchronous rectification component proposed by the present invention not only has uniform heat dissipation and a simple structure, but also has the characteristics of high efficiency, high power density, low cost, and adjustable leakage inductance. In addition, a connection method of a transformer proposed by the present invention simplifies the output structure of the electroplating power supply, reduces the usage amount of copper, and has the potential for large-scale industrialization.

[0063] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An interleaved LLC power supply synchronous rectification component, characterized in that, it includes two transformers, a full-bridge synchronous rectification switch, a phase-shifted modulation switch, a water-cooled radiator, a riser, a magnetic core fixing frame, and a copper-based circuit board; The transformers are distributed at both ends of the interleaved LLC power supply synchronous rectification component, and the secondary windings of the two transformers are connected in series in the middle of the interleaved LLC power supply synchronous rectification component; the full-bridge synchronous rectification switch is evenly and symmetrically attached to the copper-based circuit board, and the copper-based circuit board is placed in the center of the interleaved LLC power supply synchronous rectification component; the transformers and the copper-based circuit board are arranged above the water-cooled radiator through the riser, and the phase-shifted modulation switch is evenly arranged at the bottom of the water-cooled radiator; The interleaved LLC power supply synchronous rectification component further includes a first copper block and a second copper block, the first copper block and the second copper block are respectively arranged at the upper and lower ends of the copper-based circuit board, and the first copper block and the second copper block are respectively the positive input terminal and the negative input terminal after rectification of the interleaved LLC power supply synchronous rectification component; The interleaved LLC power supply synchronous rectification component further includes a third copper block and a fourth copper block, the third copper block and the fourth copper block are respectively arranged at the left and right ends of the copper-based circuit board; The two transformers are two transformers with opposite same-named terminals, including a first transformer and a second transformer; the secondary windings of the first transformer and the second transformer are connected in series, and the same-named terminals are opposite; the magnetic core structure of the transformer is a UI type, and the magnetic core structure includes two magnetic core side columns. The secondary winding of the first transformer passes through one magnetic core side column around which the primary winding of the first transformer is wound and is connected to one magnetic core side column around which the primary winding of the second transformer is wound, respectively forming the secondary winding structures of the two transformers; A first skeleton and a second skeleton are respectively sleeved on the two magnetic core side columns of the magnetic core structure of the first transformer, a third skeleton and a fourth skeleton are respectively sleeved on the two magnetic core side columns of the magnetic core structure of the second transformer, and the primary winding of the first transformer is wound on the first skeleton and the second skeleton at the same time; the primary winding of the second transformer is wound on the third skeleton and the fourth skeleton at the same time; the first skeleton and the second skeleton are parallel to each other, and the third skeleton and the fourth skeleton are parallel to each other; The secondary winding structure is a multi-layer thin copper sheet. The bottom layer of the secondary winding is attached to the water-cooled radiator and is placed under the copper-based circuit board. After the head and tail ends of the secondary winding structure pass through the magnetic core side columns of the first transformer and the second transformer, they are respectively buckled on the third copper block and the fourth copper block on the copper-based circuit board, and the secondary winding structure is connected to the third copper block and the fourth copper block with screws, serving as the positive output terminal and the negative output terminal of the interleaved LLC power supply synchronous rectification component.

2. An interleaved LLC power supply synchronous rectification component according to claim 1, characterized in that, The first transformer and the second transformer have the same design parameters, and the magnitude of the leakage magnetic flux between the primary and secondary is adjusted by adjusting the turn ratio of the primary windings on the two magnetic core side columns of each transformer, so as to realize the adjustment of the leakage inductance of the transformer.

3. An interleaved LLC power supply synchronous rectification component according to claim 1, characterized in that, The power supply structure of the interleaved LLC power supply synchronous rectification component adopts the full-bridge synchronous rectification technology. The full-bridge synchronous rectification switches include at least four, and the full-bridge synchronous rectification switches are arranged at equal intervals in an array on the upper and lower sides of the copper-based circuit board.

4. An interleaved LLC power supply synchronous rectification component according to claim 1, characterized in that, the magnetic core fixing frame is connected to the height increasing frame and buckled on the magnetic core structure of the transformer.

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