Pre-maintenance medium-pressure water-cooling power unit

Abstract

The utility model provides a pre-maintenance medium-pressure water-cooling power unit, and relates to the technical field of water-cooling power units. In the pre-maintenance medium-pressure water-cooled power unit, a mounting surface is arranged at the top of a frame body; a first mounting area, a second mounting area and a third mounting area are arranged in the frame body from top to bottom and are provided with a mounting opening in the front side of the frame body. The capacitor module is installed in the first installation area from the installation inlet. The inversion subunit is installed in the second installation area from the installation inlet. And the detection subunit is loaded into the third mounting area from the loading port. The commutator unit is detachably arranged on the mounting surface. The laminated busbar is detachably arranged on the front side of the frame body, and the capacitor module and the inversion subunits are electrically connected with the laminated busbar. The first copper bar is arranged at the top of the laminated busbar and is electrically connected with the laminated busbar; the first copper bar is also electrically connected with the commutator unit and is arranged at the front side of the commutator unit. The pre-maintenance medium-pressure water-cooling power unit provided by the utility model can solve the technical problem of high maintenance difficulty.

Description

Technical Field

[0001] The utility model relates to the technical field of water-cooled power units, in particular to a front-maintained medium-pressure water-cooled power unit. Background Art

[0002] High-voltage inverters play a vital role in numerous industries, including power generation, chemical engineering, petroleum, and metallurgy. The power unit, as its core component, has a design that directly determines its structure, size, and operational stability. Currently, for heat dissipation, low-power units generally utilize air cooling to ensure efficient heat dissipation. However, for high-power units, water cooling systems are more commonly used to cope with the higher heat load.

[0003] However, traditional water-cooled power unit designs have significant limitations. They often employ a one-piece construction, which introduces significant inconvenience during assembly. Furthermore, if a key component within the power unit fails, the entire unit must often be removed from the inverter for repair, undoubtedly increasing the complexity and difficulty of maintenance. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the technical problem of high maintenance difficulty of the water-cooling power unit in the prior art.

[0005] The embodiment of the present utility model can be implemented as follows:

[0006] The utility model provides a front-maintained medium-pressure water-cooled power unit, comprising:

[0007] The frame has a mounting surface on the top; a first mounting area, a second mounting area, and a third mounting area arranged from top to bottom are provided inside; the first mounting area, the second mounting area, and the third mounting area all form a mounting opening on the front side of the frame;

[0008] a capacitor module, detachably disposed in the first installation area from the loading port;

[0009] an inverter subunit, detachably disposed in the second installation area from the loading port;

[0010] a detection subunit, detachably disposed in the third installation area from the loading port;

[0011] a rectifier unit, detachably arranged on the mounting surface;

[0012] A laminated busbar is detachably arranged on the front side of the frame, and the capacitor module and the inverter sub-unit are electrically connected to the laminated busbar;

[0013] The first copper busbar is arranged on the top of the laminated busbar and is electrically connected to the laminated busbar; the first copper busbar is also electrically connected to the rectifier unit and is arranged on the front side of the rectifier unit.

[0014] Optionally, a plurality of partitions spaced apart from each other are provided in the first installation area; the capacitor module includes a plurality of capacitor devices, and the plurality of capacitor devices are detachably mounted on corresponding partitions.

[0015] Optionally, a guide rail extending in the front-to-back direction is provided at the bottom of the capacitor device; a sliding structure adapted to the guide rail is provided on the partition; the guide rail and the sliding structure can be slidably matched to allow the capacitor device to be slidably installed in the partition.

[0016] Optionally, a hanging ear is further provided on the front side of the capacitor device, and when the capacitor device is installed in the partition, the hanging ear is detachably connected to the frame; a pulling portion is further provided on the front side of the hanging ear, and the pulling portion is bent into an L shape, and the pulling portion is used to drive the capacitor device out of the first installation area under the action of external force.

[0017] Optionally, the inverter subunit includes a first shell, a first water-cooling plate, a second copper busbar and a plurality of first power devices; the first shell is connected to the frame and is arranged in the second installation area, the first water-cooling plate is arranged inside the first shell and is located in the middle position of the internal space of the first shell; the plurality of first power devices are respectively arranged on both sides of the thickness direction of the first water-cooling plate, and the first power devices located on opposite sides of the first water-cooling plate are electrically connected through the second copper busbar; the second copper busbar is connected to the laminated busbar.

[0018] Optionally, the inverter subunit further includes a first input end, a first output end and multiple access ports; the first input end and the multiple access ports are all located at the front side of the inverter subunit; and the first output end is located at the bottom of the inverter subunit.

[0019] Optionally, the rectifier unit includes a second shell, a second water-cooling plate, a third copper busbar and a plurality of second power devices; the second shell is connected to the frame, and the second shell is arranged on the mounting surface; the second water-cooling plate is arranged inside the second shell, and the second water-cooling plate is located in the middle position of the internal space of the second shell; a plurality of second power devices are respectively arranged on both sides of the second water-cooling plate in the thickness direction, and the second power devices located on both sides of the second water-cooling plate are electrically connected through the third copper busbar; the third copper busbar is connected to the first copper busbar.

[0020] Optionally, the rectifier unit further includes a second input end, a second output end and multiple signal interfaces; the second input end is led out from the top of the second shell; the second output end is led out from the front side of the second shell; and the multiple signal interfaces are all arranged at the top of the second shell.

[0021] Optionally, the detection subunit includes a slot plate, a tray and multiple detection elements; the slot plate is arranged at the top of the third installation area, and the tray is arranged at the bottom of the third installation area; the multiple detection elements are respectively arranged on the slot plate and the tray.

[0022] Optionally, insulating supports are provided on the bottom and rear side of the frame.

[0023] The advantages of the front-maintenance medium-pressure water-cooled power unit provided by the utility model over the prior art include:

[0024] In this front-maintained medium-pressure water-cooled power unit, since the capacitor module, inverter subunit, and detection subunit are all installed into the first installation area, the second installation area, and the third installation area respectively from the loading port located on the front side of the frame, the capacitor module, inverter subunit, and detection subunit can all be disassembled individually by disassembling them separately from the front side, which facilitates the separate maintenance of the capacitor module, inverter subunit, and detection subunit, not only reducing the difficulty of disassembly, but also reducing the difficulty of maintenance. At the same time, the rectifier subunit is located on the installation surface, that is, located at the top of the frame, and can also be disassembled and maintained separately, which also achieves the purpose of reducing the difficulty of disassembly and maintenance. Based on this, the front-maintained medium-pressure water-cooled power unit provided by the utility model can achieve the purpose of improving the technical problem of high maintenance difficulty of water-cooled power units in the prior art by front-side maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a structural diagram of the front-maintenance medium-pressure water-cooled power unit provided in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the explosion structure of the front-maintenance medium-pressure water-cooled power unit provided in an embodiment of the present application;

[0028] Figure 3 A schematic structural diagram of a capacitor device provided in an embodiment of the present application;

[0029] Figure 4 This is one of the structural diagrams of the inverter unit provided in the embodiments of the present application;

[0030] Figure 5 This is the second structural diagram of the inverter unit provided in the embodiment of the present application;

[0031] Figure 6 This is a schematic structural diagram of the slot board provided in an embodiment of the present application;

[0032] Figure 7 This is a schematic diagram of the structure of the tray provided in the embodiment of the present application;

[0033] Figure 8 This is one of the structural diagrams of the rectifier unit provided in the embodiments of the present application;

[0034] Figure 9 This is the second structural diagram of the rectifier unit provided in the embodiment of the present application.

[0035] Icons: 10 - Front-accessible medium-pressure water-cooled power unit; 100 - Frame; 110 - First installation area; 111 - Partition; 120 - Second installation area; 130 - Third installation area; 140 - Installation surface; 150 - Loading port; 160 - Insulation support; 200 - Capacitor module; 210 - Capacitor assembly; 211 - Guide rail; 212 - Mounting lug; 213 - Pulling portion; 300 - Inverter subunit; 310 - First housing; 320 - First water-cooling plate; 330 - Second copper busbar; 340-first power device; 350-first input terminal; 360-first output terminal; 370-access port; 400-detection subunit; 410-slot board; 420-tray; 430-detection element; 500-rectifier unit; 510-second housing; 520-second water-cooling plate; 530-third copper busbar; 540-second power device; 550-second input terminal; 560-second output terminal; 570-signal interface; 600-laminated busbar; 700-first copper busbar. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0040] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0041] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0042] See also Figure 1 In this embodiment, a front-maintained medium-pressure water-cooled power unit 10 is provided. The front-maintained medium-pressure water-cooled power unit 10 can be applied to a frequency converter. The front-maintained medium-pressure water-cooled power unit 10 can alleviate the technical problem of high maintenance difficulty of water-cooled power units in the prior art.

[0043] In this embodiment, please refer to Figure 1 and Figure 2The front-maintained medium-pressure water-cooled power unit 10 includes a frame 100, a capacitor module 200, an inverter unit 300, a detection unit 400, a rectifier unit 500, a laminated busbar 600, and a first copper busbar 700. It should be understood that the front-maintained medium-pressure water-cooled power unit 10 may also include other existing electrical components to achieve its functions, which will not be described in detail here. The frame 100 has a mounting surface 140 at the top; the interior is provided with a first mounting area 110, a second mounting area 120, and a third mounting area 130 arranged from top to bottom; the first mounting area 110, the second mounting area 120, and the third mounting area 130 all form an installation port 150 on the front side of the frame 100. The capacitor module 200 is detachably mounted in the first mounting area 110 from the installation port 150. The inverter unit 300 is detachably mounted in the second mounting area 120 from the installation port 150. The detection subunit 400 is removably mounted within the third mounting area 130 through the mounting opening 150. The rectifier unit 500 is removably mounted on the mounting surface 140. A laminated busbar 600 is removably mounted on the front side of the frame 100, and the capacitor module 200 and the inverter subunit 300 are both electrically connected to the laminated busbar 600. A first copper busbar 700 is mounted on top of the laminated busbar 600 and is electrically connected to the laminated busbar 600. The first copper busbar 700 is also electrically connected to the rectifier unit 500 and is located on the front side of the rectifier unit 500.

[0044] As described above, since the capacitor module 200, the inverter subunit 300, and the detection subunit 400 are all installed into the first installation area 110, the second installation area 120, and the third installation area 130 respectively from the loading port 150 located on the front side of the frame 100, the capacitor module 200, the inverter subunit 300, and the detection subunit 400 can all be disassembled individually by disassembling them separately from the front side, making it convenient to perform separate maintenance on the capacitor module 200, the inverter subunit 300, and the detection subunit 400, which not only reduces the difficulty of disassembly, but also reduces the difficulty of maintenance. At the same time, the rectifier subunit 500 is located on the mounting surface 140, that is, located at the top of the frame 100, and can also be disassembled and maintained separately, thus achieving the purpose of reducing the difficulty of disassembly and maintenance. Based on this, the front-maintained medium-pressure water-cooled power unit 10 provided by the utility model can achieve the purpose of improving the technical problem of high maintenance difficulty of water-cooled power units in the prior art by front-side maintenance.

[0045] In other words, "front maintenance" means that maintenance of the medium-pressure water-cooled power unit 10 can be completed directly from the front side of the frame 100. While establishing a front maintenance method, because the capacitor module 200, inverter subunit 300, detection subunit 400, and rectifier subunit 500 are all assembled on the frame 100 in an independently detachable manner, each component can be disassembled and maintained individually, and maintenance can be performed one by one, eliminating the need for complete disassembly, greatly reducing maintenance difficulty.

[0046] In this embodiment, a plurality of spaced-apart partitions 111 are provided in the first mounting area 110. The capacitor module 200 includes a plurality of capacitor devices 210, each of which is detachably mounted on a corresponding partition 111. The plurality of partitions 111 are spaced apart within the first mounting area 110. Furthermore, when the plurality of capacitor devices 210 are mounted on the plurality of partitions 111, the plurality of capacitor devices 210 are spaced apart from each other to allow for natural heat dissipation.

[0047] Further, see Figure 3 A guide rail 211 extending in the front-to-back direction is provided at the bottom of the capacitor device 210; a sliding structure adapted to the guide rail 211 is provided on the partition 111; the guide rail 211 and the sliding structure slidably cooperate to allow the capacitor device 210 to be slidably installed within the partition 111. The sliding cooperation between the guide rail 211 and the sliding structure reduces the force required to remove and install the capacitor device 210, thereby facilitating the removal and installation of the capacitor device 210, improving the efficiency of the removal and installation of the capacitor device 210, and thereby improving maintenance efficiency.

[0048] Optionally, the sliding structure may be a sliding groove provided on the partition 111 to facilitate the sliding connection of the capacitor device 210; of course, in other embodiments, the sliding structure may also be a rolling device, etc.

[0049] In addition, the front side of the capacitor device 210 is further provided with a hanging ear 212. When the capacitor device 210 is installed in the partition 111, the hanging ear 212 is detachably connected to the frame 100. The front side of the hanging ear 212 is also provided with a pulling portion 213. The pulling portion 213 is bent into an L shape and is used to drive the capacitor device 210 out of the first installation area 110 under the action of an external force. After the capacitor device 210 is installed in the first installation area 110 through the cooperation of the guide rail 211 and the sliding structure, the hanging ear 212 is further used to connect the capacitor device 210 and the frame 100. This can prevent the capacitor device 210 from spontaneously sliding out of the first installation area 110 and improve the installation stability of the capacitor device 210. The pulling portion 213 is further provided on the hanging ear 212. When the connection between the hanging ear 212 and the frame 100 is released, it is convenient for the user to apply force through the pulling portion 213, thereby facilitating the removal of the capacitor device 210.

[0050] In this embodiment, please refer to Figure 4 and Figure 5 The inverter subunit 300 includes a first housing 310, a first water-cooling plate 320, a second copper busbar 330, and a plurality of first power devices 340. The first housing 310 is connected to the frame 100 and is located in the second mounting area 120; the first water-cooling plate 320 is located inside the first housing 310 and is located in the middle of the internal space of the first housing 310; the plurality of first power devices 340 are respectively located on both sides of the thickness direction of the first water-cooling plate 320, and the first power devices 340 located on opposite sides of the first water-cooling plate 320 are electrically connected via the second copper busbar 330; the second copper busbar 330 is connected to the laminated busbar 600. The first water-cooling plate 320 can simultaneously provide cooling and heat dissipation to the first power devices 340 on both sides, efficiently completing the temperature reduction of the plurality of first power devices 340.

[0051] In other words, symmetrically arranging the plurality of first power devices 340 on both sides of the first water cooling plate 320 in the thickness direction can ensure that the heat dissipation effects of the first power devices 340 on both sides of the first water cooling plate 320 are comparable.

[0052] The first power device 340 may include an IGBT module and a diode, etc.

[0053] Furthermore, the inverter subunit 300 includes a first input terminal 350, a first output terminal 360, and multiple access ports 370. The first input terminal 350 and the multiple access ports 370 are all located on the front side of the inverter subunit 300; the first output terminal 360 is located at the bottom of the inverter subunit 300. Locating the first input terminal 350 and the multiple access ports 370 on the front side of the inverter subunit 300, that is, leading out from the front side of the first housing 310, meets the requirements of front maintenance and reduces maintenance difficulty.

[0054] It should be noted that the first input end 350 is the aforementioned second copper busbar 330. The access port 370 can be an optical signal access port 370, an electrical signal access port 370, or the like.

[0055] In this embodiment, please refer to Figure 8 and Figure 9 The rectifier unit 500 includes a second housing 510, a second water-cooling plate 520, a third copper busbar 530, and a plurality of second power devices 540. The second housing 510 is connected to the frame 100 and is disposed on the mounting surface 140. The second water-cooling plate 520 is disposed within the second housing 510 and is located in the middle of the interior space of the second housing 510. The plurality of second power devices 540 are disposed on both sides of the second water-cooling plate 520 in the thickness direction. The second power devices 540 on both sides of the second water-cooling plate 520 are electrically connected via the third copper busbar 530. The third copper busbar 530 is connected to the first copper busbar 700.

[0056] The plurality of second power devices 540 are symmetrically arranged on both sides of the second water-cooling plate 520 in the thickness direction, so that the airflow passing through both sides of the second water-cooling plate 520 is uniform, thereby achieving uniform heat dissipation for the plurality of second power devices 540 and improving the heat dissipation effect.

[0057] Furthermore, the rectifier unit 500 includes a second input terminal 550, a second output terminal 560, and multiple signal interfaces 570. The second input terminal 550 is led out from the top of the second housing 510; the second output terminal 560 is led out from the front of the second housing 510; and the multiple signal interfaces 570 are all located at the top of the second housing 510. Leading the second input terminal 550 and the multiple signal interfaces 570 out from the top, and leading the second output terminal 560 out from the front of the second housing 510, meets the requirements of front maintenance and reduces maintenance difficulty.

[0058] The second output end 560 represents the third copper busbar 530 mentioned above.

[0059] In this embodiment, please refer to Figure 6 and Figure 7The detection subunit 400 includes a slot board 410, a tray 420, and multiple detection elements 430. The slot board 410 is located at the top of the third mounting area 130, and the tray 420 is located at the bottom of the third mounting area 130. The multiple detection elements 430 are respectively located on the slot board 410 and the tray 420. The multiple detection elements 430 may include voltage sensors, Hall sensors, and current sensors. The multiple detection elements 430 can be pre-installed on the slot board 410 and the tray 420. However, the slot board 410 and the tray 420 can be installed in the third mounting area 130 from the front side of the frame 100, meeting the requirements of front maintenance and reducing maintenance difficulty.

[0060] In this embodiment, insulating supports 160 are provided at the bottom and rear of the frame 100. The provision of the insulating supports 160 enables floating installation of the front-maintained medium-pressure water-cooled power unit 10, meeting the floating requirements of the unit.

[0061] In summary, in the front-maintained medium-pressure water-cooled power unit 10, since the capacitor module 200, the inverter subunit 300, and the detection subunit 400 are all installed in the first installation area 110, the second installation area 120, and the third installation area 130 respectively from the loading port 150 located on the front side of the frame 100, the capacitor module 200, the inverter subunit 300, and the detection subunit 400 can all be disassembled individually by disassembling them separately from the front side, making it convenient to perform separate maintenance on the capacitor module 200, the inverter subunit 300, and the detection subunit 400, which not only reduces the difficulty of disassembly, but also reduces the difficulty of maintenance. At the same time, the rectifier subunit 500 is located on the mounting surface 140, that is, located at the top of the frame 100, and can also be disassembled and maintained separately, thus achieving the purpose of reducing the difficulty of disassembly and maintenance. Based on this, the front-maintained medium-pressure water-cooled power unit 10 provided by the utility model can achieve the purpose of improving the technical problem of high maintenance difficulty of water-cooled power units in the prior art by front-maintenance.

[0062] 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 changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A front-maintained medium-pressure water-cooled power unit, characterized in that: include: A frame (100) is provided with a mounting surface (140) on the top; a first mounting area (110), a second mounting area (120), and a third mounting area (130) are arranged from top to bottom inside; the first mounting area (110), the second mounting area (120), and the third mounting area (130) all form a mounting opening (150) on the front side of the frame (100); A capacitor module (200) is detachably mounted in the first mounting area (110) through the loading port (150); An inverter subunit (300) is detachably disposed in the second installation area (120) from the loading port (150); a detection subunit (400) detachably disposed in the third installation area (130) from the loading port (150); A rectifier unit (500) is detachably mounted on the mounting surface (140); A laminated busbar (600) is detachably arranged on the front side of the frame (100), and the capacitor module (200) and the inverter subunit (300) are both electrically connected to the laminated busbar (600); A first copper busbar (700) is provided on the top of the laminated busbar (600) and is electrically connected to the laminated busbar (600); the first copper busbar (700) is also electrically connected to the rectifier unit (500) and is provided on the front side of the rectifier unit (500).

2. The front-maintained medium-pressure water-cooled power unit according to claim 1 is characterized in that: A plurality of partitions (111) spaced apart from each other are provided in the first installation area (110); the capacitor module (200) comprises a plurality of capacitor devices (210), and the plurality of capacitor devices (210) are detachably mounted on corresponding partitions (111).

3. The front-maintenance medium-pressure water-cooled power unit according to claim 2 is characterized in that: The bottom of the capacitor device (210) is provided with a guide rail (211) extending in the front-back direction; the partition (111) is provided with a sliding structure adapted to the guide rail (211); the guide rail (211) and the sliding structure are slidably matched to enable the capacitor device (210) to be slidably installed in the partition (111).

4. The front-maintained medium-pressure water-cooled power unit according to claim 2, characterized in that: The front side of the capacitor device (210) is further provided with a hanging ear (212), and when the capacitor device (210) is installed in the partition (111), the hanging ear (212) is detachably connected to the frame (100); the front side of the hanging ear (212) is further provided with a pulling portion (213), and the pulling portion (213) is bent into an L shape, and the pulling portion (213) is used to drive the capacitor device (210) to withdraw from the first installation area (110) under the action of an external force.

5. The front-maintained medium-pressure water-cooled power unit according to claim 1, characterized in that: The inverter subunit (300) comprises a first shell (310), a first water-cooling plate (320), a second copper busbar (330) and a plurality of first power devices (340); the first shell (310) is connected to the frame (100) and is arranged in the second installation area (120); the first water-cooling plate (320) is arranged inside the first shell (310) and is located in the middle of the internal space of the first shell (310); the plurality of first power devices (340) are respectively arranged on both sides of the first water-cooling plate (320) in the thickness direction, and the first power devices (340) located on opposite sides of the first water-cooling plate (320) are electrically connected through the second copper busbar (330); the second copper busbar (330) is connected to the laminated busbar (600).

6. The front-maintained medium-pressure water-cooled power unit according to claim 5, characterized in that: The inverter subunit (300) further comprises a first input terminal (350), a first output terminal (360), and a plurality of access ports (370); the first input terminal (350) and the plurality of access ports (370) are both located at the front side of the inverter subunit (300); and the first output terminal (360) is located at the bottom of the inverter subunit (300).

7. The front-maintained medium-pressure water-cooled power unit according to claim 1, characterized in that: The rectifier unit (500) comprises a second shell (510), a second water-cooling plate (520), a third copper busbar (530) and a plurality of second power devices (540); the second shell (510) is connected to the frame (100), and the second shell (510) is arranged on the mounting surface (140); the second water-cooling plate (520) is arranged inside the second shell (510), and the second water-cooling plate (520) is located in the middle of the internal space of the second shell (510); the plurality of second power devices (540) are respectively arranged on both sides of the second water-cooling plate (520) in the thickness direction, and the second power devices (540) located on both sides of the second water-cooling plate (520) are electrically connected through the third copper busbar (530); the third copper busbar (530) is connected to the first copper busbar (700).

8. The front-maintained medium-pressure water-cooled power unit according to claim 7, characterized in that: The rectifier unit (500) further comprises a second input end (550), a second output end (560) and a plurality of signal interfaces (570); the second input end (550) is led out from the top of the second shell (510); the second output end (560) is led out from the front side of the second shell (510); and the plurality of signal interfaces (570) are all arranged on the top of the second shell (510).

9. The front-maintained medium-pressure water-cooled power unit according to claim 1, characterized in that: The detection subunit (400) comprises a slot plate (410), a tray (420) and a plurality of detection elements (430); the slot plate (410) is arranged at the top of the third installation area (130), and the tray (420) is arranged at the bottom of the third installation area (130); and the plurality of detection elements (430) are respectively arranged on the slot plate (410) and the tray (420).

10. The front-maintained medium-pressure water-cooled power unit according to claim 1, characterized in that: Insulating supports (160) are provided on the bottom and rear side of the frame (100).

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