A test power supply and its mounting components

Abstract

This invention discloses a test power supply and its mounting assembly to solve the problems of complex assembly process, difficult maintenance, and excessive wires in multilayer PCB assemblies. Specifically, it includes a mounting assembly, a first circuit board, a second circuit board, a third circuit board, a fourth circuit board, a fifth circuit board, a fan assembly, and a busbar adapter circuit board. The mounting assembly includes a mounting base plate and N+1 insulating plates (N≥1) mounted side-by-side vertically on its upper surface, forming N air ducts. A fan assembly is installed in the middle section of each air duct, and the first and second circuit boards are located on the rear side of the fan assembly. The first and second circuit boards are mounted back-to-back and electrically connected via conductive posts. The third, fourth, and fifth circuit boards are located on the front side of the fan assembly. The fourth and fifth circuit boards are mounted back-to-back with the third circuit board and electrically connected via conductive posts. The front and rear sides of the busbar adapter circuit board are electrically connected to the fourth and second circuit boards, respectively.

Description

Technical Field

[0001] This invention relates to test power supplies, and more particularly to a test power supply and its mounting components. Background Technology

[0002] Currently, test power supplies assembled from multi-layer PCB components are generally assembled by stacking multiple mounting boards sequentially. Each mounting board is equipped with multiple mounting posts for fixing the circuit board in place. This mounting structure often causes the following problems:

[0003] First, the more layers a PCB has, the more mounting boards are needed, which can lead to more problems, such as safety regulations. Each layer requires an insulating sheet for insulation and separation, making the PCB assembly installation process more complex and inconvenient.

[0004] Secondly, if the PCB component at the bottom layer malfunctions and needs repair, all the PCB components on the upper layers must be removed before the bottom layer can be repaired, making repair difficult and potentially causing secondary damage.

[0005] In addition, in existing test power supplies, the PCB components on each layer are interconnected by wires, which not only causes a lot of contact problems, but also makes the internal structure of the test power supply messy and difficult to repair. Summary of the Invention

[0006] The purpose of this invention is to provide a test power supply and its mounting components to solve the technical problems of existing test power supplies assembled from multi-layer PCB components, which have complex installation processes, are difficult to repair, have too many wires causing poor contact problems, and are messy and unsightly inside.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A test power supply, characterized in that it includes mounting components, a first circuit board, a second circuit board, a third circuit board, a fourth circuit board, a fifth circuit board, a fan assembly, and a busbar adapter circuit board;

[0009] The mounting assembly includes a mounting base plate and N+1 insulating plates, where N≥1; the N+1 insulating plates are mounted side by side and vertically on the upper surface of the mounting base plate, so that an air duct is formed between each pair of adjacent insulating plates, forming a total of N air ducts;

[0010] Each air duct has a fan assembly in the middle section;

[0011] Each fan assembly has a first circuit board and a second circuit board on its rear side; the first circuit board overlaps the top of two adjacent insulating boards, and the components on its front are located inside the air duct; the second circuit board is mounted back-to-back above the first circuit board and is electrically connected to the first circuit board through conductive posts.

[0012] The third, fourth, and fifth circuit boards are respectively installed on the front side of the fan assembly; the third circuit board overlaps the top of each insulating plate, and the components on the front of the third circuit board are divided into N parts, each of which is located in one of the N air ducts; the components on the back of the third circuit board are concentrated on one side of the third circuit board; the fourth and fifth circuit boards are installed side by side on the other side of the back of the third circuit board, and are respectively electrically connected to the third circuit board back to back through conductive posts; the fourth circuit board is positioned close to the fan assembly.

[0013] The busbar adapter circuit board is nested with the wind turbine assembly, so that the busbar adapter circuit board is distributed on the front and rear sides of the wind turbine assembly; the busbar adapter circuit board located on the front side of the wind turbine assembly is electrically connected to the fourth circuit board through conductive posts, and the busbar adapter circuit board located on the rear side of the wind turbine assembly is electrically connected to the second circuit board through conductive posts.

[0014] The above structural design simplifies the installation process, provides excellent safety performance, and features independent air ducts, improving maintenance convenience.

[0015] Furthermore, the fan assembly includes a fan bracket and a plurality of fans mounted on the fan bracket;

[0016] All the wind turbine brackets are one-piece brackets. The one-piece brackets have N-1 lower notches at the bottom, and each of the N-1 lower notches corresponds to one of the N-1 insulating plates located in the middle, so that the N-1 insulating plates are respectively embedded in the N-1 lower notches; the one-piece brackets have N upper notches at the top.

[0017] The busbar adapter circuit board includes an adapter board body and N connecting plates arranged side by side on one side of the adapter board body; the adapter board body is electrically connected to the fourth circuit board; the N connecting plates pass through N upper notches and are electrically connected to the second circuit board.

[0018] Furthermore, each air duct is equipped with three fans, two of which are installed side by side at the lower rear side of the fan bracket, and the remaining fan is installed at the upper rear side of the fan bracket and is biased towards either of the fans located below, so that an inductor mounting space is formed above the other fan located below.

[0019] An inductor is provided on the connecting plate; the inductor is located within the inductor mounting space.

[0020] Furthermore, the first circuit board has M first protrusions on one side and M first grooves on the other side, M≥1, so that two adjacent first circuit boards can interlock with each other; the first protrusions overlap the top of the insulating board;

[0021] The second circuit board has M second protrusions on one side that correspond to the first protrusion, and M second grooves on the other side that correspond to the first groove, so that two adjacent second circuit boards can be interlocked. The second protrusions are located above the first protrusions.

[0022] Furthermore, the top of the insulating plate is provided with a step, so that the top of the front part of the insulating plate forms a lower step surface and the top of the rear part of the insulating plate forms an upper step surface, the upper step surface being higher than the lower step surface;

[0023] The first circuit board is attached to the upper step surface of the step, and the third circuit board is attached to the lower step surface of the step, such that the second circuit board located above the first circuit board is flush with the fourth circuit board located above the third circuit board.

[0024] Furthermore, it also includes a U-shaped bracket with the opening facing downwards;

[0025] One end of the third circuit board overlaps the top of each insulating board, and the other end extends out of the front side of the insulating board.

[0026] The U-shaped bracket is located on the front side of each insulating plate and installed below the third circuit board. The two ends of the U-shaped bracket are fixedly connected to external components to support the third circuit board.

[0027] Furthermore, the conductive post includes an upper conductive block and a lower conductive block;

[0028] The second circuit board is detachably connected to the first circuit board, the third circuit board is connected to the fourth circuit board, the third circuit board is connected to the fifth circuit board, the busbar adapter circuit board is connected to the fourth circuit board, and the busbar adapter circuit board is connected to the second circuit board via hexagonal copper pillars.

[0029] Each of the upper conductive blocks is respectively disposed on the back of the second circuit board, the back of the fourth circuit board, the back of the fifth circuit board, and below the busbar adapter circuit board; each of the lower conductive blocks is respectively disposed on the back of the first circuit board, the front of the second circuit board, the back of the third circuit board, and the front of the fourth circuit board.

[0030] The upper conductive block contacts the corresponding lower conductive block to achieve electrical connection.

[0031] Furthermore, the side of the insulating plate is provided with a transverse reinforcing rib and a plurality of vertical reinforcing ribs perpendicular to the transverse reinforcing rib;

[0032] The top of the insulating board is provided with multiple mounting holes, and a vertical reinforcing rib is provided below each mounting hole;

[0033] The vertical reinforcing rib corresponding to the mounting hole has a reinforcing block at one end, and the mounting hole is set in the corresponding reinforcing block;

[0034] Both the first and third circuit boards are connected to the insulating plate by screws provided in each of the mounting holes.

[0035] Furthermore, the first circuit board is a bidirectional DC-DC+BUCK power circuit board;

[0036] The second circuit board is a bidirectional DC-DC control circuit board;

[0037] The third circuit board is a PWM rectifier chopper board;

[0038] The fourth circuit board is a PWM rectifier power board;

[0039] The fifth circuit board is an input filter circuit board.

[0040] The present invention also provides a mounting assembly for a test power supply, characterized in that it includes a mounting base plate and N+1 insulating plates, where N≥1;

[0041] N+1 insulating plates are installed side by side vertically on the upper surface of the mounting base plate, so that an air duct is formed between each pair of adjacent insulating plates, forming a total of N air ducts; the top of the insulating plates is used to install the first circuit board and the third circuit board, and the air ducts are used to embed the components and fan assemblies set on the front of the first circuit board and the third circuit board.

[0042] The beneficial effects of this invention are:

[0043] 1. This invention provides mounting components for a first circuit board, a second circuit board, a third circuit board, a fourth circuit board, a fifth circuit board, and a fan assembly. The components on the front of the first and third circuit boards are placed within air ducts formed between adjacent insulating plates. The second, fourth, and fifth circuit boards are connected back-to-back with the first and third circuit boards, facing upwards. This allows all circuit boards to be divided into two layers, with one first circuit board and one second circuit board distributed within each air duct. This simplifies the installation process. Furthermore, if the first circuit board at the bottom layer fails, the first and second circuit boards within the corresponding air ducts can be removed together for repair. Similarly, if the third circuit board at the bottom layer fails, the third, fourth, and fifth circuit boards can be removed together for repair. This structure greatly improves the convenience of test power supply maintenance. In addition, the insulating plates also give the test power supply excellent safety performance.

[0044] 2. The present invention also provides a busbar adapter circuit board between the second circuit board and the fourth circuit board. The busbar adapter circuit board eliminates the need for wire connections in the middle of the entire test power supply, thus avoiding poor contact caused by wire bending, improving the stability of the test power supply, and also increasing the neatness and aesthetics of the entire test power supply.

[0045] 3. The mounting assembly of the present invention is provided with air ducts, and three fans are provided in each air duct. The combination of air ducts and fan distribution can make the air used for cooling more uniform when the test power supply is running, which is conducive to the balanced heat dissipation of each circuit board device.

[0046] 4. The present invention provides a first protrusion and a first groove on the edge of the first circuit board, and a second protrusion and a second groove on the edge of the second circuit board. This not only allows the first circuit board to overlap the insulating board via the first protrusion, but also ensures that the connection points of two adjacent first circuit boards to the top of the same insulating board are on the same straight line, increasing the stability and aesthetics of the structure. Furthermore, the second circuit board provides a second protrusion corresponding to the first protrusion and a second groove corresponding to the first groove. This allows for simultaneous removal and maintenance of the first and second circuit boards located in the same air duct, avoiding obstruction between adjacent first or second circuit boards and further improving the convenience of maintenance.

[0047] 5. The present invention provides a step on the top of the insulating board, places the first circuit board on the top of the upper step surface and the third circuit board on the top of the lower step surface, so that the second and fourth circuit boards are flush. This facilitates the connection between the busbar transfer circuit board and the second and fourth circuit boards, and also makes the overall structure neater and more aesthetically pleasing.

[0048] 6. Since the test power supply is very large and heavy, in order to avoid structural deformation, the present invention also sets a U-shaped bracket on the front side of the insulating plate to support the third circuit board, thereby increasing the stability of the overall structure.

[0049] 7. This invention incorporates a conductive pillar composed of an upper conductive block and a lower conductive block. The conductive pillar provides support, making the entire structure more stable. Furthermore, the upper and lower conductive blocks enable electrical connection, eliminating the need for excessive wiring in the test power supply and enhancing the overall aesthetics. Additionally, the conductive pillar increases the contact area for electrical connections, ensuring their stability.

[0050] 8. Since the test power supply is very large and heavy, the present invention also provides horizontal and vertical reinforcing ribs on the side of the insulation board, and reinforcing blocks at both ends of the vertical reinforcing ribs to increase the stability of the entire structure. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of a test power supply embodiment of the present invention;

[0052] Figure 2 This is an exploded view of an embodiment of a test power supply according to the present invention;

[0053] Figure 3 This is a schematic diagram of the installation components in an embodiment of the present invention;

[0054] Figure 4 This is a side view of an embodiment of a test power supply according to the present invention;

[0055] Figure 5 This is one of the structural schematic diagrams of the wind turbine assembly in an embodiment of the present invention;

[0056] Figure 6 This is the second schematic diagram of the structure of the fan assembly in this embodiment of the invention;

[0057] Figure 7 This is a schematic diagram of the busbar adapter circuit board in an embodiment of the present invention;

[0058] Figure 8 This is a schematic diagram of the back structure of the first circuit board (bidirectional DC-DC+BUCK power circuit board) in an embodiment of the present invention;

[0059] Figure 9 This is a front view of the second circuit board (bidirectional DC-DC control circuit board) in an embodiment of the present invention.

[0060] Figure 10 This is a top view of the first and second circuit boards installed in the mounting assembly in an embodiment of the present invention.

[0061] Icon labels:

[0062] 1-Mounting component, 11-Mounting base plate, 12-Insulation plate, 121-Horizontal reinforcing rib, 122-Vertical reinforcing rib, 123-Mounting hole, 124-Reinforcing block, 13-Air duct, 14-Upper step surface, 15-Lower step surface; 2-First circuit board, 21-First protrusion, 22-First groove; 3-Second circuit board, 31-Second protrusion, 32-Second groove; 4-Third circuit board; 5-Fourth circuit board; 6-Fifth circuit board; 7-Fan assembly, 71-Fan bracket, 711-Lower notch, 712-Upper notch, 72-Fan, 73-Inductor mounting space; 8-Busbar adapter circuit board, 81-Adapter board body, 82-Connecting plate, 83-Inductor, 84-Hexagonal copper pillar; 9-Conductive pillar; 10-U-shaped bracket. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] Figure 1 This is a schematic diagram of the structure of a test power supply embodiment of the present invention. Figure 2 This is an exploded view of an embodiment of a test power supply of the present invention, combined with... Figure 1 and Figure 2 As shown, the test power supply includes mounting assembly 1, first circuit board 2, second circuit board 3, third circuit board 4, fourth circuit board 5, fifth circuit board 6, fan assembly 7, and bus adapter circuit board 8. Specifically, in this embodiment, the first circuit board 2 is a bidirectional DC-DC+BUCK power circuit board; the second circuit board 3 is a bidirectional DC-DC control circuit board; the third circuit board 4 is a PWM rectifier chopper board; the fourth circuit board 5 is a PWM rectifier power board; and the fifth circuit board 6 is an input filter circuit board.

[0065] Figure 3 This is a schematic diagram of the installation component in an embodiment of the present invention. Figure 4 This is a side view of an embodiment of a test power supply according to the present invention, combined with... Figure 3 and Figure 4As shown, the mounting assembly 1 includes a mounting base plate 11 and N+1 insulating plates 12, where N≥1. In this embodiment, N=3, meaning there are a total of four insulating plates 12. The four insulating plates 12 are mounted side by side vertically on the upper surface of the mounting base plate 11, so that an air duct 13 is formed between each two adjacent insulating plates 12, forming a total of three air ducts 13. A fan assembly 7 is provided in the middle section of each air duct, which is beneficial for the balanced heat dissipation of the components in each air duct.

[0066] Figure 5 This is one of the structural schematic diagrams of the fan assembly in an embodiment of the present invention. Figure 6 This is the second structural schematic diagram of the fan assembly in an embodiment of the present invention, combined with... Figure 5 and Figure 6 As shown, the fan assembly 7 specifically includes a fan bracket 71 and nine fans 72 mounted on the fan bracket; each air duct 13 has three fans 72, two of which are mounted side by side on the lower rear side of the fan bracket 71, and the remaining fan 72 is mounted on the upper rear side of the fan bracket 71, biased towards one of the lower fans 72, so that an inductor mounting space 73 is formed above the lower fan 72; all the fan brackets 71 are integrated brackets, that is, the fan brackets 71 in the three air ducts are combined into one integrated bracket, and the integrated bracket has two lower notches 711 at the bottom, which correspond to the two insulating plates 12 located in the middle, so that the two insulating plates 12 are respectively embedded in the two lower notches 711; the integrated bracket has three upper notches 712 at the top; the three upper notches 712 correspond to three inductor mounting spaces 73. Each fan assembly 7 has a first circuit board 2 and a second circuit board 3 on its rear side; the first circuit board 2 overlaps the top of two adjacent insulating plates 12, and the components on its front side are located inside the air duct 13; the second circuit board 3 is mounted back-to-back above the first circuit board 2 and is electrically connected to the first circuit board 2 through conductive posts 9; the third circuit board 4, the fourth circuit board 5, and the fifth circuit board 6 are respectively mounted on the front side of the fan assembly 7; the third circuit board 4 overlaps the top of each insulating plate 12, and the components on the front side of the third circuit board 4 are divided into three parts, which are located in three air ducts 13 respectively. 4. The components on the back are concentrated on one side of the third circuit board 4; the fourth circuit board 5 and the fifth circuit board 6 are installed side by side on the other side of the back of the third circuit board 4 and are electrically connected to the third circuit board 4 back to back through conductive posts 9 respectively; the fourth circuit board 5 is set close to the fan assembly 7; the bus adapter circuit board 8 is nested with the fan assembly 7, so that the bus adapter circuit board 8 is distributed on the front and rear sides of the fan assembly 7; the bus adapter circuit board 8 located on the front side of the fan assembly 7 is electrically connected to the fourth circuit board 5 through conductive posts 9, and the bus adapter circuit board 8 located on the rear side of the fan assembly 7 is electrically connected to the second circuit board 3 through conductive posts 9.

[0067] Specifically, Figure 7 This is a schematic diagram of the busbar adapter circuit board in an embodiment of the present invention, as shown below. Figure 7 As shown, the busbar adapter circuit board 8 includes an adapter board body 81 and three connecting plates 82 arranged side-by-side on one side of the adapter board body 81; each connecting plate 82 is provided with an inductor 83; the adapter board body 81 is electrically connected to the fourth circuit board 5; the three connecting plates 82 pass through three upper notches 712 respectively and are electrically connected to the second circuit board 3, and the inductors 83 are located in the corresponding inductor mounting spaces 73. This not only connects the various circuit boards located before and after the fan assembly together, but also eliminates the need for wires, improving the overall aesthetics of the structure.

[0068] Figure 8 This is a schematic diagram of the back structure of the first circuit board (bidirectional DC-DC + BUCK power circuit board) in an embodiment of the present invention, as shown below. Figure 8 As shown, the first circuit board 2 has M first protrusions 21 on one side and M first grooves 22 on the other side, where M ≥ 1. In this embodiment, M = 2, that is, the first circuit board 2 has two first protrusions 21 on one side and two first grooves 22 on the other side. The positions of the first protrusions 21 and the first grooves 22 correspond to each other, so that two adjacent first circuit boards 2 can be interlocked. The first circuit board 2 is attached to the top of the insulating plate 12 by the first protrusions 21. Specifically, the first protrusions 21 are connected to the insulating plate 12 by screws. Figure 9 This is a front view of the second circuit board (bidirectional DC-DC control circuit board) in an embodiment of the present invention, as shown below. Figure 9 As shown, the second circuit board 3 has two second protrusions 31 on one side corresponding to the first protrusion 21, and two second grooves 32 on the other side corresponding to the first groove 22, so that adjacent second circuit boards 3 can interlock. The second protrusions 31 are located above the first protrusions 21, so that during maintenance, the first circuit board 2 and the second circuit board 3 located in the same air duct 13 can be removed simultaneously without conflicting with adjacent first circuit boards 2 or second circuit boards 3. In addition, as Figure 10 As shown, it also enables the connection points of two adjacent first circuit boards 2 and the same insulating plate 12 to be located on the same straight line, increasing the aesthetics and rationality of the overall structure.

[0069] like Figure 3As shown, since the components on the front of the first circuit board 2 are higher than the components on the front of the third circuit board 4, the top of the insulating plate 12 in this embodiment of the invention is provided with a step, so that the top of the front part of the insulating plate 12 forms a lower step surface 15, and the top of the rear part of the insulating plate 12 forms an upper step surface 14, which is higher than the lower step surface 15. The first circuit board 2 overlaps on the upper step surface 14 of the step, and the third circuit board 4 overlaps on the lower step surface 15 of the step. This allows the second circuit board 3 located above the first circuit board 2 to be flush with the fourth circuit board 5 located above the third circuit board 4. It also facilitates the installation of the busbar adapter circuit board 8, thereby making the entire structure neater and more aesthetically pleasing.

[0070] Because the test power supply is relatively large and heavy, weighing approximately 30 kilograms, this embodiment of the invention also includes a U-shaped bracket 10 with an opening facing downwards to improve the overall structural stability. One end of the third circuit board 4 is connected to the top of each insulating plate 12 by screws, and the other end extends out of the front side of the insulating plate 12. The U-shaped bracket 10 is set on the front side of each insulating plate 12 and installed below the third circuit board 4. Both ends of the U-shaped bracket 10 are fixedly connected to external components to support the third circuit board 4 so that the third circuit board 4 remains stable.

[0071] The conductive post 9 may include an upper conductive block and a lower conductive block; the second circuit board 3 and the first circuit board 2, the third circuit board 4 and the fourth circuit board 5, the third circuit board 4 and the fifth circuit board 6, the busbar adapter circuit board 8 and the fourth circuit board 5, and the busbar adapter circuit board 8 and the second circuit board 3 are all detachably connected by hexagonal copper posts 84; the back of the second circuit board 8, the back of the fourth circuit board 5, the back of the fifth circuit board 6, and the bottom of the busbar adapter circuit board 8 are respectively provided with upper conductive blocks, and the back of the first circuit board 2, the front of the second circuit board 3, the back of the third circuit board 4, and the front of the fourth circuit board 5 are respectively provided with lower conductive blocks; the upper conductive block contacts the corresponding lower conductive block to achieve electrical connection. This increases the contact area of ​​the electrical connection, improves the reliability of the electrical connection, and avoids the use of wires.

[0072] In this embodiment of the invention, a horizontal reinforcing rib 121 and a plurality of vertical reinforcing ribs 122 perpendicular to the horizontal reinforcing rib 121 are provided on the side of the insulating plate 12. A plurality of mounting holes 123 are provided on the top of the insulating plate 12, and a vertical reinforcing rib 122 is provided below each mounting hole 123. A reinforcing block 124 is provided at one end of the vertical reinforcing rib 122 corresponding to the mounting hole 123, and the mounting hole 123 is located in the corresponding reinforcing block 124. The screws for connecting the first circuit board 2 and the third circuit board 4 to the insulating plate 12 are located in the mounting holes to increase the robustness of the insulating plate 12.

[0073] This invention also provides a test power supply mounting assembly, such as... Figure 3As shown, it includes a mounting base plate 11 and four insulating plates 12; the four insulating plates 12 are mounted side by side vertically on the upper surface of the mounting base plate 11, so that an air duct 13 is formed between each two adjacent insulating plates 12, forming a total of three air ducts 13; the top of the insulating plates 12 is used to mount the first circuit board 2 and the third circuit board 4, and the air ducts 13 formed are used to embed the components and fan assembly 7 on the front of the first circuit board 2 and the third circuit board 4.

[0074] This mounting assembly can neatly assemble the bidirectional DC-DC+BUCK power circuit board, the bidirectional DC-DC control circuit board, the PWM rectifier chopper board, the PWM rectifier power board, and the input filter circuit board together. At the same time, the three first circuit boards 2 are isolated by the insulating plate 12, thereby forming excellent insulation and safety performance, and improving the installation convenience, maintenance convenience, and overall aesthetics of each circuit board.

[0075] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0076] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A test power supply, characterized in that: Includes mounting components (1), first circuit board (2), second circuit board (3), third circuit board (4), fourth circuit board (5), fifth circuit board (6), fan assembly (7), and bus transition circuit board (8); The mounting assembly (1) includes a mounting base plate (11) and N+1 insulating plates (12), where N≥1; the N+1 insulating plates (12) are mounted side by side vertically on the upper surface of the mounting base plate (11), so that an air duct (13) is formed between each two adjacent insulating plates (12), and a total of N air ducts (13) are formed. Each air duct (13) has a fan assembly (7) in the middle section; Each fan assembly (7) has a first circuit board (2) and a second circuit board (3) on its rear side; the first circuit board (2) overlaps the top of two adjacent insulating plates (12), and the components on its front are located in the air duct (13); the second circuit board (3) is mounted back-to-back above the first circuit board (2) and is electrically connected to the first circuit board (2) through a conductive post (9); The third circuit board (4), the fourth circuit board (5), and the fifth circuit board (6) are respectively installed on the front side of the fan assembly (7); the third circuit board (4) overlaps the top of each insulating plate (12), the components on the front of the third circuit board (4) are divided into N parts, and the N parts are respectively located in N air ducts (13), and the components on the back of the third circuit board (4) are concentrated on one side of the third circuit board (4); the fourth circuit board (5) and the fifth circuit board (6) are installed side by side on the other side of the back of the third circuit board (4), and are respectively connected to the third circuit board (4) back to back through conductive posts (9); the fourth circuit board (5) is set close to the fan assembly (7); The busbar adapter circuit board (8) is nested with the fan assembly (7), such that the busbar adapter circuit board (8) is distributed on the front and rear sides of the fan assembly (7); the busbar adapter circuit board (8) located on the front side of the fan assembly (7) is electrically connected to the fourth circuit board (5) through the conductive post (9), and the busbar adapter circuit board (8) located on the rear side of the fan assembly (7) is electrically connected to the second circuit board (3) through the conductive post (9).

2. The test power supply according to claim 1, characterized in that: The fan assembly (7) includes a fan bracket (71) and a plurality of fans (72) mounted on the fan bracket. All the fan brackets (71) are integrated brackets. The integrated brackets have N-1 lower notches (711) at the bottom. The N-1 lower notches (711) correspond to the N-1 insulating plates (12) located in the middle, so that the N-1 insulating plates (12) are respectively embedded in the N-1 lower notches (711). The integrated brackets have N upper notches (712) at the top. The busbar adapter circuit board (8) includes an adapter board body (81) and N connecting boards (82) arranged side by side on one side of the adapter board body (81); the adapter board body (81) is electrically connected to the fourth circuit board (5); the N connecting boards (82) pass through N upper notches (712) and are electrically connected to the second circuit board (3).

3. The test power supply according to claim 2, characterized in that: Each air duct (13) is provided with three fans (72), two of which are installed side by side on the lower rear side of the fan bracket (71), and the remaining fan (72) is installed on the upper rear side of the fan bracket (71) and is biased towards one of the fans (72) located below, so that an inductor mounting space (73) is formed above the other fan (72) located below. An inductor (83) is provided on the connecting plate (82); the inductor (83) is located within the inductor mounting space (73).

4. The test power supply according to claim 1, 2, or 3, characterized in that: The first circuit board (2) has M first protrusions (21) on one side and M first grooves (22) on the other side, M≥1, so that two adjacent first circuit boards (2) can be interlocked; the first protrusions (21) overlap the top of the insulating plate (12); The second circuit board (3) has M second protrusions (31) on one side corresponding to the first protrusion (21), and M second grooves (32) corresponding to the first groove (22) on the other side, so that two adjacent second circuit boards (3) can be interlocked. The second protrusions (31) are located above the first protrusions (21).

5. The test power supply according to claim 4, characterized in that: The top of the insulating plate (12) is provided with a step, so that the top of the front part of the insulating plate (12) forms a lower step surface (15) and the top of the rear part of the insulating plate (12) forms an upper step surface (14), and the upper step surface (14) is higher than the lower step surface (15). The first circuit board (2) overlaps the upper step surface (14) of the step, and the third circuit board (4) overlaps the lower step surface (15) of the step, so that the second circuit board (3) located above the first circuit board (2) is flush with the fourth circuit board (5) located above the third circuit board (4).

6. The test power supply according to claim 5, characterized in that: It also includes a U-shaped bracket (10) with the opening facing downwards. One end of the third circuit board (4) overlaps the top of each insulating plate (12), and the other end extends out of the front side of the insulating plate (12); The U-shaped bracket (10) is set on the front side of each insulating plate (12) and installed below the third circuit board (4). The two ends of the U-shaped bracket (10) are fixedly connected to external components to support the third circuit board (4).

7. The test power supply according to claim 6, characterized in that: The conductive post (9) includes an upper conductive block and a lower conductive block; The second circuit board (3) is detachably connected to the first circuit board (2), the third circuit board (4) is detachably connected to the fourth circuit board (5), the third circuit board (4) is detachably connected to the fifth circuit board (6), the busbar adapter circuit board (8) is detachably connected to the fourth circuit board (5), and the busbar adapter circuit board (8) is detachably connected to the second circuit board (3) via hexagonal copper pillars (84). Each of the upper conductive blocks is respectively disposed on the back of the second circuit board (3), the back of the fourth circuit board (5), the back of the fifth circuit board (6), and below the busbar adapter circuit board (8); each of the lower conductive blocks is respectively disposed on the back of the first circuit board (2), the front of the second circuit board (3), the back of the third circuit board (4), and the front of the fourth circuit board (5); The upper conductive block contacts the corresponding lower conductive block to achieve electrical connection.

8. The test power supply according to claim 7, characterized in that: The insulating plate (12) has a horizontal reinforcing rib (121) and a plurality of vertical reinforcing ribs (122) perpendicular to the horizontal reinforcing rib (121) on its side. The top of the insulating plate (12) is provided with a plurality of mounting holes (123), and a vertical reinforcing rib (122) is provided below each mounting hole (123). The vertical reinforcing rib (122) corresponding to the mounting hole (123) is provided with a reinforcing block (124) at one end, and the mounting hole (123) is provided in the corresponding reinforcing block (124); Both the first circuit board (2) and the third circuit board (4) are connected to the insulating plate (12) by screws provided in each of the mounting holes (123).

9. The test power supply according to claim 8, characterized in that: The first circuit board (2) is a bidirectional DC-DC+BUCK power circuit board; The second circuit board (3) is a bidirectional DC-DC control circuit board; The third circuit board (4) is a PWM rectifier chopper board; The fourth circuit board (5) is a PWM rectifier power board; The fifth circuit board (6) is an input filter circuit board.

Images