MOS tube assembly layout structure of direct-current power supply and direct-current power supply

Abstract

The utility model discloses an MOS tube assembly layout structure of a direct-current power supply and the direct-current power supply. The MOS tube assembly layout structure comprises a box body, a positive electrode output bar, a negative electrode output bar, and an MOS tube assembly, a transformer, an output inductor, a busbar and a filter capacitor which are arranged in the box body, the MOS tube assembly is detachably installed on the end face of a cavity of the transformer, and the transformer is a water-cooled transformer. The input end of the MOS tube assembly is electrically connected to the secondary side output row of the transformer, the positive electrode output of the MOS tube assembly is electrically connected to the positive electrode output row through the busbar, and the negative electrode output of the MOS tube assembly is electrically connected to the negative electrode output row through the output inductor. In the scheme, the MOS tube assembly is detachably arranged in the cavity of the transformer, so that the later maintenance is convenient; and the transformer is a water-cooled transformer, so that heat generated during operation of the MOS tube assembly can be conveniently transmitted out of the box body through cooling water in the transformer, and the service life of the MOS tube assembly is prevented from being shortened due to over-high temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies, in particular to a MOS tube component layout structure of a direct current power supply and a direct current power supply. Background Art

[0002] With the development of society, the country has strongly called for energy conservation and emission reduction. MOS tubes, with their low power consumption and high frequency characteristics, help reduce the energy consumption and operating costs of electronic products, thereby improving economic benefits. Furthermore, their advantages in stability and reliability help reduce product failure rates and repair costs. Using MOS tubes in DC power supplies also effectively improves DC power supply efficiency.

[0003] Therefore, how to install the MOS tube into the DC power supply safely, reliably and conveniently is a technical problem that technicians in this field urgently need to solve. Utility Model Content

[0004] In view of this, the utility model provides a MOS tube assembly layout structure for a DC power supply, which can install the MOS tube into the DC power supply safely, reliably and conveniently.

[0005] The utility model also provides a DC power supply including the above-mentioned MOS tube component layout structure.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A MOS tube assembly layout structure for a DC power supply includes: a box, a positive output bar, a negative output bar, and a MOS tube assembly, a transformer, an output inductor, a bus bar, and a filter capacitor arranged in the box;

[0008] The MOS tube assembly can be detachably mounted on the cavity end face of the transformer, and the transformer is a water-cooled transformer;

[0009] The input end of the MOS tube component is electrically connected to the secondary output row of the transformer, the positive output of the MOS tube component is electrically connected to the positive output row through the bus bar, and the negative output of the MOS tube component is electrically connected to the negative output row through the output inductor.

[0010] Preferably, the MOS tube assembly comprises: a plurality of MOS tubes and a PCB board;

[0011] A plurality of MOS tubes are arranged on the PCB board, and the PCB board is mounted on the end surface of the transformer cavity by bolts.

[0012] Preferably, the secondary output row of the transformer is fixed on the MOS tube assembly.

[0013] Preferably, heat dissipation silicone cloth is filled between the side surface of the busbar and the side surface of the transformer cavity that is arranged opposite to each other.

[0014] Preferably, it further comprises: a resistor-capacitor absorption plate; the resistor-capacitor absorption plate is installed on the side of the bus bar and arranged close to the MOS tube assembly.

[0015] Preferably, it further comprises: a filter capacitor disposed in the box, wherein both ends of the filter capacitor are electrically connected to the positive output row and the negative output row respectively.

[0016] Preferably, the end surface of the transformer cavity is flush with the end surface of the busbar, and the end surface of the transformer cavity and the end surface of the busbar form a horizontal end surface;

[0017] The MOS tube assembly is detachably mounted on the horizontal end surface.

[0018] Preferably, a first water cooling channel is provided in the negative output row; a second water cooling channel is provided in the transformer cavity;

[0019] The first water-cooling channel is connected to the second water-cooling channel. The first water-cooling channel is provided with a first water nozzle and a second water nozzle. The first water nozzle and the second water nozzle are both pull-out structures. One of the first water nozzle and the second water nozzle is a water inlet nozzle and the other is a water outlet nozzle.

[0020] Preferably, the number of the MOS tube components is two symmetrically arranged groups, and the number of the secondary output rows of the transformer is two symmetrically arranged;

[0021] A group of MOS tube components can be detachably mounted on the upper end surface of the transformer cavity, and its input end is electrically connected to one of the secondary output bars; another group of MOS tube components can be detachably mounted on the lower end surface of the transformer cavity, and its input end is electrically connected to another of the secondary output bars;

[0022] The negative output of each group of MOS tube components is electrically connected to the negative output row through the output inductor, and the positive output of each group of MOS tube components is electrically connected to the positive output row through the bus bar.

[0023] A DC power supply comprises: the layout structure of the above-mentioned MOS tube assembly, and further comprising: a filter, a rectifier bridge, a smoothing inductor, a first inverter module, a DC blocking capacitor, a support capacitor, an absorption capacitor, and a second inverter module, which are arranged in sequence within the housing;

[0024] The output end of the first inverter module is connected to the first input primary side of the transformer, and the output end of the second inverter module is connected to the second input primary side of the transformer.

[0025] Preferably, the rectifier bridge, the supporting capacitor, the first inverter module and the second inverter module are sequentially arranged on the side of the negative output row, and the negative output row is a water cooling row.

[0026] It can be seen from the above technical solution that the MOS tube assembly layout structure provided by the present invention, compared with the existing technology, sets the MOS tube assembly on the cavity end face of the transformer, so that the MOS tube assembly is easy to install, and the MOS tube assembly is set on the cavity end face of the transformer in a detachable manner, which makes subsequent maintenance convenient; furthermore, the transformer is a water-cooled transformer, which facilitates the heat generated during its operation to be transferred to the outside of the box through the cooling water inside the transformer, thereby avoiding shortening the service life of the MOS tube assembly due to excessive temperature rise.

[0027] The present invention also provides a DC power supply, which has corresponding beneficial effects due to the adoption of the layout structure of the above-mentioned MOS tube assembly. For details, please refer to the above description, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the overall structure of a DC power supply provided by an embodiment of the present invention from one perspective (a group of adjacent sides of the hidden box);

[0030] Figure 2 A schematic diagram of the overall structure of the DC power supply provided by an embodiment of the utility model from another perspective (the other set of adjacent side edges of the box are hidden);

[0031] Figure 3 This is a schematic diagram of the overall structure of a DC power supply provided by an embodiment of the present utility model (with a hidden box).

[0032] Among them, 1 is the box, 2 is the MOS tube component; 3 is the transformer, 31 is the secondary output; 4 is the output inductor; 5 is the bus; 6 is the Hall sensor; 7 is the filter capacitor; 8 is the positive output row; 9 is the back plate of the box; 10 is the inlet and outlet water nozzles, 101 is the first water nozzle, 102 is the second water nozzle; 11 is the negative output row; 12 is the filter; 13 is the rectifier bridge; 14 is the smoothing inductor; 15 is the first inverter module; 16 is the DC blocking capacitor; 17 is the support capacitor; 18 is the absorption capacitor; 19 is the second inverter module; 20 is the resistor-capacitor absorption plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The MOS tube assembly layout structure of the DC power supply provided by the embodiment of the present utility model is as follows: Figure 1-Figure 3 As shown, it includes: a box body 1, a positive output bus 8, a negative output bus 11, and a MOS tube assembly 2, a transformer 3, an output inductor 4, a bus bar 5 and a filter capacitor 7 arranged in the box body 1;

[0035] The MOS tube assembly 2 is detachably mounted on the cavity end face of the transformer 3, and the transformer is a water-cooled transformer;

[0036] The input end of the MOS transistor assembly 2 is electrically connected to the secondary output bank 31 of the transformer 3, the positive output of the MOS transistor assembly is electrically connected to the positive output bank 8 through the bus 5, and the negative output of the MOS transistor assembly 2 is electrically connected to the negative output bank 11 through the output inductor 4.

[0037] The working principle of the above scheme is as follows: the secondary output row 31 of the transformer 3 is electrically connected to the MOS tube assembly 2; the positive output of the MOS tube assembly 2 is electrically connected to the positive output row 8 through the bus 5 (the output end of the positive output row 8 is located outside the box 1), and the negative output of the MOS tube assembly 2 is electrically connected to the negative output row 11 through the output inductor 4 (the output end of the negative output row 11 is located outside the box 1); in this technical solution, the MOS tube assembly 2 is used in the DC power supply, effectively improving the efficiency of the DC power supply. Due to its low power consumption, high frequency and other characteristics, it helps to reduce the energy consumption and operating costs of electronic products, thereby improving economic benefits.

[0038] In the above technical solution, compared with the existing technology, the MOS tube assembly is arranged on the cavity end face of the transformer 3, so that the MOS tube assembly 2 is easy to install, and the MOS tube assembly is arranged on the cavity end face of the transformer 3 in a detachable manner, which makes subsequent maintenance and replacement convenient; furthermore, the transformer is a water-cooled transformer. The water-cooled transformer facilitates the heat generated during its operation to be transferred to the outside of the box through the cooling water inside the transformer, thereby avoiding shortening the service life of the MOS tube assembly due to excessive temperature rise; at the same time, the advantages of the MOS tube in stability and reliability also help reduce the failure rate and maintenance cost of the product.

[0039] Optimize the above technical solutions, such as Figure 1As shown, the MOS tube assembly 2 includes: multiple MOS tubes and a PCB board;

[0040] Multiple MOS tubes are arranged on a PCB board, which is mounted on the end face of the transformer 3 cavity by bolts. The bolt connection facilitates the installation and removal of the MOS tube assembly 2 (facilitating the subsequent replacement and maintenance of the MOS tube assembly 2).

[0041] In the above technical solution, the PCB board is arranged on the end surface of the transformer 3 cavity, so that the heat generated by the MOS tube during operation can be transferred to the outside of the box through the transformer 3.

[0042] The above technical solution is optimized, and the secondary output row 31 of the transformer 3 is fixed on the MOS tube assembly. Since the MOS tube assembly is directly mounted on the cavity end face of the transformer 3, the secondary output row 31 of the transformer 3 is directly fixed on the MOS tube assembly 2, which effectively reduces the connection loop impedance and loop loss. The short-distance connection between the transformer and the MOS tube is effectively controlled, which can reduce the leakage inductance of the transformer 3, reduce the peak burrs of the output voltage, and reduce the withstand voltage impact on the MOS tube assembly 2, which is conducive to improving the service life of the MOS tube assembly 2.

[0043] To optimize the above technical solution, heat dissipation silicone cloth is filled between the side of the busbar 5 and the side opposite to the transformer cavity 3. With this arrangement, the heat on the busbar 5 can be carried out to the outside through the cooling water inside the transformer cavity, avoiding shortening the service life of the MOS tube assembly 2 and the RC absorption board installed thereon due to excessive temperature rise.

[0044] Optimize the above technical solutions, such as Figure 2 As shown, it also includes: a resistor-capacitor absorption plate 20; the resistor-capacitor absorption plate 20 is installed on the side of the bus 5 and is arranged close to the MOS tube component 2; in this technical solution, the resistor-capacitor absorption plate 20 is installed on the side of the bus 5 and close to the position of the MOS tube component 2, which more effectively absorbs the peak glitch voltage on the MOS tube component 2.

[0045] Optimize the above technical solutions, such as Figure 1 As shown, it also includes: a filter capacitor 7 arranged in the box 1, and the two ends of the filter capacitor 7 are electrically connected to the positive output row 8 and the negative output row 11 respectively. The filter capacitor 7 is used to reduce the AC ripple coefficient and output smooth DC.

[0046] Optimize the above technical solutions, such as Figure 1-Figure 3 As shown, the end face of the transformer 3 cavity is flush with the end face of the busbar 5 , and the end face of the transformer 3 cavity and the end face of the busbar 5 form a horizontal end face. This arrangement facilitates the installation of the MOS tube assembly 2.

[0047] The MOS tube assembly 2 can be detachably mounted on the horizontal end surface, which facilitates the subsequent replacement and maintenance of the MOS tube assembly 2. Such an installation also makes the overall structure of the DC power supply compact.

[0048] Optimize the above technical solutions, such as Figure 1-Figure 3 As shown, a first water cooling channel is provided in the negative output row 11; a second water cooling channel is provided in the transformer 3 cavity;

[0049] The first water-cooling channel is connected to the second water-cooling channel. The first water-cooling channel is provided with a first water nozzle 101 and a second water nozzle 102. The first water nozzle 101 and the second water nozzle 102 are both pull-out structures. One of the first water nozzle 101 and the second water nozzle 102 is a water inlet nozzle and the other is a water outlet nozzle.

[0050] In the above technical solution, cooling water enters from the water inlet of the first water cooling channel, flows through the second water cooling channel, and then flows out from the water outlet of the first water cooling channel. During this process, the heat of the negative output row 11 and the transformer 3 cavity is taken away by the flow of cooling water.

[0051] Optimize the above technical solution, the first water-cooling channel includes a first pipe and a second pipe, and the second water-cooling channel includes a third pipe and a fourth pipe; wherein, the first end of the first pipe is connected to the water inlet, the second end of the first pipe is connected to the first end of the third pipe, the second end of the third pipe is connected to the first end of the fourth pipe, the second end of the fourth pipe is connected to the first end of the second pipe, and the second end of the second pipe is connected to the water outlet; the above working principle is: cooling water enters from the water inlet of the first pipe, passes through the third pipe and the fourth pipe, and flows out from the water outlet of the second pipe, and takes away heat during the flow of water.

[0052] Optimizing the above technical solution, the number of MOS tube components 2 is two symmetrically arranged groups, and the number of secondary output banks 31 of the transformer 3 is two symmetrically arranged groups;

[0053] One set of MOS tube components 2 is detachably mounted on the upper end surface of the transformer 3 cavity, and its input end is electrically connected to one secondary output row 31; another set of MOS tube components 2 is detachably mounted on the lower end surface of the transformer 3 cavity, and its input end is electrically connected to the other secondary output row 31;

[0054] The negative outputs of the two MOS transistor assemblies 2 are electrically connected to the negative output bank 11 through the output inductor 4 , and the positive outputs of the two MOS transistor assemblies 2 are electrically connected to the positive output bank 8 through the bus 5 .

[0055] In the above technical solution, the arrangement of two groups of MOS tube components 2 and two secondary output banks 31 cooperates with the transformer 3 to form upper and lower full bridges to increase the power of the DC power supply.

[0056] A DC power supply, comprising: the layout structure of the MOS tube assembly as described above,

[0057] The system further includes: a filter 12, a rectifier bridge 13, a smoothing inductor 14, a first inverter module 15, a DC blocking capacitor 16, a support capacitor 17, an absorption capacitor 18, and a second inverter module 19, which are arranged in sequence in the box. The first inverter module 15 and the second inverter module 19 form an H-bridge circuit.

[0058] The output end of the first inverter module 15 is connected to the first input primary side of the transformer 3 , and the output end of the second inverter module 19 is connected to the second input primary side of the transformer 3 .

[0059] In the above technical solution, the first inverter module 15 is connected in series with a DC blocking capacitor 16 (the DC blocking capacitor is composed of one or more capacitors connected in parallel); the positive output end of the rectifier bridge 13 is connected in series with a smoothing inductor 14, the smoothing inductor 14 is input into the support capacitor 17 and the positive end of the inverter module through a conductor, and the negative output end of the rectifier bridge 13 is input into the support capacitor 17 and the negative end of the inverter module through a conductor; the smoothing inductor 14 is fixed to the right side frame of the box 1 by bolts; two absorption capacitors 18 are respectively connected in parallel to the positive and negative input ends of the two inverter modules. The absorption capacitors 18 are connected nearby, which can effectively absorb peak voltages, protect the inverter modules, and extend their service life.

[0060] To optimize the above technical solution, the rectifier bridge 13, the supporting capacitor 17, the first inverter module 15 and the second inverter module 19 are sequentially arranged on the side of the negative output row 11, and the negative output row 11 is a water cooling row.

[0061] In the above scheme, the heat generated during operation of the negative output row 11 is transferred to the outside of the box 1 through the cooling water inside the negative output row 11, thereby improving the service life of the components; preferably, the rectifier bridge 13, the support capacitor 17, the first inverter module 15 and the second inverter module 19 are fixed to the negative output row 11 by bolts.

[0062] The technical features mentioned above, the technical features described below, and the technical features shown individually in the accompanying drawings may be combined arbitrarily, as long as the combined technical features do not conflict with each other. All possible feature combinations are technical contents explicitly described in this document. Any of the multiple sub-features included in the same statement can be applied independently and does not necessarily have to be applied in conjunction with the other sub-features.

[0063] The present invention will be further described below with reference to specific embodiments:

[0064] In this technical solution, a DC power supply includes a box and main components arranged in the box, which are arranged in the following order according to electrical connection: filter, rectifier bridge, smoothing inductor, inverter module, support capacitor, absorption capacitor, DC blocking capacitor, high-frequency transformer, MOS tube assembly, bus, current sampling Hall, positive output row, output inductor, filter capacitor plate, and negative output row; the filter is installed on the right side of the rear plate of the box, and the filter's own terminals serve as the DC module input terminal, and the output terminals are connected to the input side of the rectifier bridge through conductors.

[0065] In this technical solution, the transformer is a high-frequency transformer, and the output MOS tube assembly (MOS tube is arranged on the PCB board) is directly fixed to the upper and lower sides of the high-frequency transformer cavity by bolts (the high-frequency transformer is a water-cooled transformer, and there is flowing cooling water inside the cavity). The heat generated during its operation is transferred out of the module through the cooling water inside the high-frequency transformer, avoiding shortening its service life due to excessive temperature rise.

[0066] In this technical solution, the upper and lower end surfaces of the transformer cavity are flush with the upper and lower end surfaces of the busbar, which facilitates the installation and fixation of the MOS tube assembly; the output inductor is arranged at the rear end of the high-frequency transformer and between the negative output bar and the busbar, and the whole is treated with thermal conductive glue. Because there is flowing cooling water inside the high-frequency transformer and the negative output bar, the heat is transferred to the outside of the box, avoiding excessive temperature rise and shortening its service life.

[0067] The operating principle of this solution is as follows: AC power enters the filter, filters out noise, and then enters the rectifier bridge; the rectifier bridge converts AC power into DC power; after the DC power absorbs ripple through the smoothing inductor, it enters the inverter module (IGBT), support capacitors, absorption capacitors, and DC blocking capacitors, and the DC power with stable voltage and current is input into the high-frequency transformer as the primary side; the secondary output of the transformer is connected to the MOS tube component; the MOS tube component outputs positive and negative poles, the positive pole is connected to the current sampling Hall through the bus, and the positive output is output to the outside of the module; the negative pole is connected to the output inductor and then to the negative output bus and output to the outside of the module; the filter capacitor plate is connected between the positive output bus and the negative output bus to reduce the AC ripple coefficient and output smooth DC power.

[0068] The main advantages of this technical solution are:

[0069] The main components are arranged in sequence according to the electrical connections, and the module layout looks more refreshing and intuitive after installation;

[0070] Use the filter's built-in terminals as the DC module input terminals to reduce electrical connection points and lower the failure rate;

[0071] Two absorption capacitors are connected in parallel to the positive and negative input terminals of the two inverter modules respectively. The absorption capacitors are connected nearby to effectively absorb the peak voltage, protect the inverter modules, and extend the service life of components.

[0072] The upper and lower secondary outputs of the transformer are connected to the input of the MOS tube assembly through conductive bars. Since the MOS tube assembly is directly mounted on the upper and lower end surfaces of the water-cooled transformer cavity, the upper and lower secondary output bars of the transformer are directly fixed to the MOS tube assembly, effectively reducing the connection loop impedance and loop loss. The short-distance connection between the transformer and the MOS tube is effectively controlled, which can reduce the transformer leakage inductance, reduce the output voltage spikes and burrs, and reduce the voltage withstand impact on the MOS tube assembly, thereby extending the service life of the MOS tube assembly.

[0073] The negative output of the MOS tube component is directly connected to the transformer cavity. The cavity serves as the negative pole and is connected to the input end of the output inductor. The output end of the output inductor is connected to the negative output row, serving as the negative output DC power module.

[0074] The output inductor is placed at the rear end of the high-frequency transformer and between the negative output bar and the busbar. The entire module is thermally conductive and potted with glue. Because there is flowing cooling water inside the high-frequency transformer and the negative output bar, the heat is transferred out of the module to avoid excessive temperature rise and shortening its service life.

[0075] The left side of the transformer cavity is isolated by heat-dissipating silicone cloth, and the right side of the bus is isolated and fixed by bolts. The heat on the bus can be carried out of the box through the cooling water inside the transformer cavity, avoiding excessive temperature rise and shortening the service life of the MOS tube components and RC absorption board installed on it;

[0076] The positive output of the MOS tube component is directly connected to the bus, the bus is connected to the positive output row, passes through the current sampling Hall (that is, the Hall sensor 6), and serves as the positive output DC power supply module;

[0077] The RC absorption plate is installed on the left side of the busbar, close to the MOS tube component, to more effectively absorb the spike voltage on the MOS tube component.

[0078] The filter capacitor board is installed on the rear panel of the box, between the positive output row and the negative output row, and the electrical connection is connected to the positive and negative output rows of the DC power module nearby;

[0079] The external water channel and the inlet and outlet nozzle connections of the box are designed as CPC block pull-out structures. During the later maintenance of the equipment, the modular water channel connections can be quickly disassembled or installed.

[0080] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0081] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A MOS tube assembly layout structure for a DC power supply, characterized in that: include: A box (1), a positive output row (8), a negative output row (11), and a MOS tube assembly (2), a transformer (3), an output inductor (4), a busbar (5), and a filter capacitor (7) arranged in the box (1); The MOS tube assembly (2) is detachably mounted on the cavity end face of the transformer (3), and the transformer is a water-cooled transformer; The input end of the MOS tube component (2) is electrically connected to the secondary output row (31) of the transformer (3), the positive output of the MOS tube component is electrically connected to the positive output row (8) through the bus bar (5), and the negative output of the MOS tube component (2) is electrically connected to the negative output row (11) through the output inductor (4).

2. The MOS tube assembly layout structure according to claim 1, characterized in that: The MOS tube assembly (2) comprises: a plurality of MOS tubes and a PCB board; A plurality of MOS tubes are arranged on the PCB board, and the PCB board is mounted on the end surface of the transformer (3) cavity by means of bolts.

3. The MOS tube assembly layout structure according to claim 1, characterized in that: The secondary output row (31) of the transformer (3) is fixed on the MOS tube assembly (2).

4. The MOS tube assembly layout structure according to claim 1, characterized in that: Heat dissipation silicone cloth is filled between the side surface of the busbar (5) and the side surface of the transformer (3) cavity that is arranged opposite to each other.

5. The MOS tube assembly layout structure according to claim 1, characterized in that: Also includes: A resistor-capacitor absorption plate (20); the resistor-capacitor absorption plate (20) is installed on the side of the bus bar (5) and is arranged close to the MOS tube assembly (2).

6. The MOS tube assembly layout structure according to claim 1, characterized in that: Also includes: A filter capacitor (7) is arranged in the box (1), and two ends of the filter capacitor (7) are electrically connected to the positive output row (8) and the negative output row (11) respectively.

7. The MOS tube assembly layout structure according to claim 1, characterized in that: The end surface of the transformer (3) cavity and the end surface of the busbar (5) are flush, and the end surface of the transformer (3) cavity and the end surface of the busbar (5) form a horizontal end surface; The MOS tube assembly (2) is detachably mounted on the horizontal end surface.

8. The MOS tube assembly layout structure according to claim 1, characterized in that: A first water cooling channel is provided in the negative electrode output row (11); a second water cooling channel is provided in the transformer (3) cavity; The first water-cooling channel is connected to the second water-cooling channel. The first water-cooling channel is provided with a first water nozzle (101) and a second water nozzle (102). The first water nozzle (101) and the second water nozzle (102) are both pull-out structures. One of the first water nozzle (101) and the second water nozzle (102) is a water inlet nozzle and the other is a water outlet nozzle.

9. The MOS tube assembly layout structure according to any one of claims 1 to 8, characterized in that: The number of the MOS tube components (2) is two symmetrically arranged groups, and the number of the secondary output rows (31) of the transformer (3) is two symmetrically arranged groups; One group of MOS tube assemblies (2) is detachably mounted on the upper end surface of the transformer (3) cavity, and its input end is electrically connected to one of the secondary output rows (31); another group of MOS tube assemblies (2) is detachably mounted on the lower end surface of the transformer (3) cavity, and its input end is electrically connected to another of the secondary output rows (31); The negative output of each group of MOS tube components (2) is electrically connected to the negative output row (11) through the output inductor (4), and the positive output of each group of MOS tube components (2) is electrically connected to the positive output row (8) through the busbar (5).

10. A DC power supply, characterized in that: include: The layout structure of the MOS tube assembly according to any one of claims 1 to 9, further comprising: a filter (12), a rectifier bridge (13), a smoothing inductor (14), a first inverter module (15), a DC blocking capacitor (16), a support capacitor (17), an absorption capacitor (18), and a second inverter module (19) arranged in sequence within the housing; The output end of the first inverter module (15) is connected to the first input primary side of the transformer (3), and the output end of the second inverter module (19) is connected to the second input primary side of the transformer (3).

11. The DC power supply according to claim 10, wherein: The rectifier bridge (13), the supporting capacitor (17), the first inverter module (15) and the second inverter module (19) are sequentially arranged on the side of the negative output row (11), and the negative output row (11) is a water cooling row.

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