Rectifying unit module

Abstract

The utility model discloses a rectification unit module, and relates to the technical field of electrical equipment, a base module is provided with a capacitance resistance module and a power module, and the top end of the capacitance resistance module and / or the power module is provided with a water-air heat exchanger; air ducts arranged in the water-air heat exchanger, the capacitance-resistance module, the base module and the power module are sequentially connected end to end to form a circulating air duct; a fan of the water-air heat exchanger is used for providing power, so that air in the power module is cooled through a heat exchange plate, and the cooled air enters the capacitance-resistance module and enters the power module through the base module from the capacitance-resistance module; the rectification unit module adopts an integrated design, the integration level is higher, the module can be integrally installed in a cabinet, and the integral transportation and installation are convenient; and a fully-closed circulating air duct is arranged, so that the heat dissipation efficiency is higher, and the service life of the product is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power equipment, further relates to a rectifier unit module. BACKGROUND

[0002] The rectifier unit module is a modular device integrating rectifier circuits and related components, and its core function is to convert alternating current into direct current. According to different application scenarios and design requirements, the rectifier unit module can adopt various circuit topologies, such as three-phase Vienna rectifier circuits, thyristor rectifier circuits, etc.

[0003] The rectifier unit module adopts a topology structure composed of IGBT (Insulated Gate Bipolar Transistor), capacitors, resistors, etc., which can convert alternating current into direct current. In recent years, with the development of power electronics technology in the power industry, this topology structure technology has been increasingly applied to various fields, including photovoltaic inverters, wind power converters, high-voltage frequency converters, UPS (Uninterruptible Power Supply), APF (Active Power Filter) / SVG (Static Var Generator), high-frequency power supplies, etc.

[0004] The power module and the capacitor-resistor module of the rectifier unit module are independently arranged, and a heat dissipation structure needs to be arranged for the power module and the capacitor-resistor module, which is relatively complex. UTILITY MODEL CONTENTS

[0005] The core of the utility model is to provide a rectifier unit module with integrated design, higher integration, a circulating air duct with full-closed design, higher heat dissipation efficiency, and longer product service life. The specific scheme is as follows:

[0006] A rectifier unit module, comprising a base module, a capacitor-resistor module and a power module are mounted on the base module, a water-air heat exchanger is mounted at the top of the capacitor-resistor module and / or the power module;

[0007] The water-air heat exchanger, the capacitor-resistor module, the base module, and the air ducts arranged in the power module are sequentially connected in a loop to form a circulating air duct;

[0008] The water-air heat exchanger comprises a water-air heat exchanger shell, a fan, and a heat exchange plate, and the water-air heat exchanger shell is provided with an air duct for airflow;

[0009] The fan is used to provide power to make the air in the power module pass through the heat exchange plate to cool down, and the cooled air enters the capacitor-resistor module and then passes through the base module to enter the power module.

[0010] Optionally, the capacitor-resistor module comprises a capacitor-resistor shell, a DC laminated busbar, a capacitor, and a resistor, and the capacitor-resistor shell and the DC laminated busbar jointly form an air duct for air flow.

[0011] The capacitor and the resistor are arranged one by one and are respectively installed on two sides of the DC laminated busbar.

[0012] The capacitors are arranged in an array in the air duct.

[0013] Optionally, the upper side of the capacitor-resistor shell is provided with an air inlet for docking the water-air heat exchanger shell.

[0014] The upper part of the capacitor-resistor shell is provided with a guide slope for guiding the air flow entering from the side to flow downward.

[0015] Optionally, the power module comprises a power shell, a liquid cooling plate, an IGBT assembly, a module laminated busbar, and an input connecting plate, the power shell is provided with an air duct for air flow, and the IGBT assembly is thermally installed on the liquid cooling plate.

[0016] The input connecting plate is used for electrically connecting an alternating current power supply, and the IGBT assembly is electrically connected to the DC laminated busbar through the module laminated busbar.

[0017] Optionally, a connecting channel module is arranged between the power module and the water-air heat exchanger, the connecting channel module comprises a top base and a bottom base in fixed communication with each other, and the top end of the bottom base is in fixed communication with the top base.

[0018] The top end of the top base is connected to the bottom of the water-air heat exchanger shell, and the top end of each power module is fixed to the bottom of the bottom base.

[0019] Optionally, the power shell comprises a module upper base, a module lower base, a front insulating baffle, a rear insulating baffle, a first side cover plate, and a second side cover plate which can be detachably installed.

[0020] Optionally, the base module comprises a main base and a power base in fixed communication with each other, the main base is provided with a main base groove for air of the capacitor-resistor shell to enter, and the sidewall of the main base groove is provided with an air guide hole.

[0021] The power base is protrudingly arranged on the upper surface of the main base, and the bottom end of each power shell is docked to the top end of one power base.

[0022] Optionally, the base module is provided with a channel steel around.

[0023] Optionally, the liquid cooling plate and the heat exchange plate are connected to the same liquid cooling source.

[0024] Optionally, the total length of the three power modules is less than the length of the capacitor resistance module.

[0025] The utility model provides a rectifier unit module, install capacitor resistance module and power module on base module, install water air heat exchanger at the top of capacitor resistance module and / or power module, the air duct that sets up in water air heat exchanger, capacitor resistance module, base module, power module inside respectively is connected in proper order in the end to form circulating air duct, the fan of water air heat exchanger is used to provide power, make the air in power module pass through heat exchange plate cooling, and the air after cooling enters capacitor resistance module, and from capacitor resistance module passes through base module and enters power module, rectifier unit module adopts integrated design, and the degree of integration is higher, can install the module whole body in the cabinet, and the whole transportation, installation is convenient, has the circulating air duct of full -enclosed design, and the heat dissipation efficiency is higher, prolongs product life. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0027] Figure 1 It is a front view of a specific embodiment of the rectifier unit module of the utility model;

[0028] Figure 2 It is a schematic diagram of airflow circulation of the rectifier unit module of the utility model;

[0029] Figure 3 It is a front view of a specific embodiment of the rectifier unit module of the utility model;

[0030] Figure 4 It is a schematic diagram of a specific embodiment of the power module;

[0031] Figure 5 It is a schematic diagram of a specific embodiment of the connecting channel module;

[0032] Figure 6 It is a schematic diagram of a specific embodiment of the water air heat exchanger;

[0033] Figure 7 It is a schematic diagram of a specific embodiment of the capacitor resistance module;

[0034] Figure 8A schematic view of one embodiment of the base module.

[0035] The figure includes:

[0036] Base module 10; main base 110; main base groove 111; air guide hole 112; power base 120;

[0037] Capacitor resistance module 20; capacitor resistance shell 210; air inlet 211; guide slope 212; DC laminated busbar 220; capacitor 230; resistor 240;

[0038] Power module 30; power shell 310; upper module base 311; lower module base 312; front insulating baffle 313; rear insulating baffle 314; first side cover plate 315; second side cover plate 316; liquid cooling plate 320; IGBT assembly 330; module laminated busbar 340; input connecting plate 350;

[0039] Water-air heat exchanger 40; water-air heat exchanger shell 410; fan 420; heat exchange plate 430;

[0040] Connection channel module 50; top base 510; bottom base 520. DETAILED DESCRIPTION

[0041] In order for those skilled in the art to better understand the technical scheme of the utility model, the rectifier unit module of the utility model will be described in detail below in combination with the drawings and specific embodiments.

[0042] In combination with Figure 1 The utility model provides a rectifier unit module, adopts IGBT, capacitor, resistor and other elements to combine a kind of topological structure, for converting into direct current from alternating current.

[0043] The rectifier unit module of the utility model includes base module 10, capacitor resistance module 20, power module 30, water-air heat exchanger 40 and other structures.Base module 10 plays the role of support, capacitor resistance module 20 and power module 30 are installed on base module 10, and capacitor resistance module 20 and power module 30 are distributed side by side.Capacity resistance module 20 and power module 30 are set to three, each power module 30 is connected to one of three-phase current, and rectification is carried out by IGBT assembly 330 in power module 30.

[0044] Capacitor resistance module 20 and power module 30 generate heat when working, and need to be cooled.Capacitor resistance module 20 and / or power module 30 install water-air heat exchanger 40 at top, and cooling is carried out by water-air heat exchanger 40.Water-air heat exchanger 40 absorbs the heat of airflow in air duct, and the heat is transferred to cooling liquid, and the heat is taken out by cooling liquid, to realize the cooling of air in air duct.

[0045] The water-air heat exchanger 40, capacitor-resistor module 20, base module 10, and power module 30 each have internal air ducts that are connected end-to-end to form a circulating air duct. Figure 2 As shown, the water-air heat exchanger 40 is equipped with a fan 420 for driving airflow. Starting from the water-air heat exchanger 40, the airflow driven by the water-air heat exchanger 40 passes sequentially through the capacitor-resistor module 20, the base module 10, and the power module 30, and then flows back to the water-air heat exchanger 40, forming a circulating flow. The air ducts of the water-air heat exchanger 40, the capacitor-resistor module 20, the base module 10, and the power module 30 are interconnected to form a closed cavity. Airflow is provided inside the cavity. During the airflow process, heat is continuously transferred from the heating structures of the capacitor-resistor module 20 and the power module 30 to the water-air heat exchanger 40 to maintain the capacitor-resistor module 20 and the power module 30 within their normal operating temperature range.

[0046] Combination Figure 6 As shown, the water-air heat exchanger 40 includes a water-air heat exchange shell 410, a fan 420, and a heat exchange plate 430. The water-air heat exchange shell 410 has a thin-shell structure and can be made of sheet metal through sheet bending. The water-air heat exchange shell 410 is provided with air ducts for airflow. The function of the air ducts is to guide the airflow and make it flow along a set path. Figure 6 As shown by the middle arrow, the airflow flows from bottom to top through the heat exchange plate 430 and enters the air passage inside the water-air heat exchange shell 410. The fan 420 is a centrifugal fan. Driven by the fan 420, the air flows out from the outlet on one side of the water-air heat exchange shell 410. When the air passes through the water-air heat exchanger 40, the flow direction changes from vertical flow to horizontal flow.

[0047] The fan 420 provides power to cool the air in the power module 30 through the heat exchange plate 430. The heat exchange plate 430 is provided with several pipes for the flow of coolant. There are gaps between the pipes to allow air to pass through. The pipes are made of high thermal conductivity material. When the air comes into contact with the outer surface of the pipes, it exchanges heat with the coolant between the pipes, transferring the heat in the air to the coolant. The coolant can flow out of the water-air heat exchanger 40, carrying away the heat.

[0048] The water-air heat exchanger 40 has an air outlet on one side and an air inlet at the bottom of the heat exchange plate; the rest is a fully enclosed design. Heat is drawn into the water-air heat exchanger by a centrifugal fan, and the hot air is carried away by the cooling medium connected to the heat exchange plate, ensuring that the air outlet of the water-air heat exchanger 40 maintains a continuous flow of cool air. The bottom of the water-air heat exchanger is bolted to the connecting channel, and the side of the water-air heat exchanger's air outlet is connected to the air duct housing of the module.

[0049] The high-temperature air forms low-temperature air after passing through the heat exchange plate 430, and the low-temperature air after being cooled enters the air channel of the capacitor-resistor module 20, and absorbs heat generated by the capacitor and the resistor during the process of passing through the capacitor-resistor module 20. The air after absorbing heat from the capacitor-resistor module 20 enters the base module 10, and the air passes through the base module 10 from the capacitor-resistor module 20 and enters the power module 30, and the air further absorbs heat generated by the devices of the power module 30 when reaching the power module 30, and the air flows out of the air channel of the power module 30 and reenters the water-air heat exchanger 40, to complete a circulation flow. The air continuously circulates in the circulation air channel, continuously transfers heat outward, and maintains the rectifier unit module at a suitable temperature.

[0050] The rectifier unit module is integrally designed, and the base module 10, the capacitor-resistor module 20, the power module 30 and the water-air heat exchanger 40 are connected to form a circulation air channel, so that the integration degree is higher, and the module can be installed in the cabinet as a whole.

[0051] On the basis of the above-mentioned scheme, in combination with Figure 7 As shown in the figure, the capacitor-resistor module 20 comprises a capacitor-resistor shell 210, a DC laminated busbar 220, a capacitor 230 and a resistor 240. The capacitor-resistor shell 210 is a thin shell structure, and the capacitor-resistor shell 210 and the DC laminated busbar 220 jointly form an air channel for air flow.

[0052] The capacitor 230 and the resistor 240 are one-to-one corresponding and installed on the DC laminated busbar 220, and the capacitor 230 and the resistor 240 are respectively installed on two sides of the DC laminated busbar 220. The mounting hole distance of the capacitor 230 is the same as the mounting hole distance of the resistor 240.

[0053] As shown in the figure, Figure 7 The capacitor 230 is arrayed on the inner side of the DC laminated busbar 220, and the resistor 240 is arrayed on the outer side of the DC laminated busbar 220. The capacitor 230 is arrayed in the air channel, and the air flow in the air channel contacts. The heat generation of the capacitor 230 is more than that of the resistor 240, and the air of the capacitor-resistor module 20 mainly dissipates heat for the capacitor 230. The resistor 240 is installed on the outer surface and can directly contact the external air for heat dissipation.

[0054] The direct current laminated busbar 220 and the capacitor resistor shell 210 are fixed by bolt connection, and the capacitor resistor module 20 is fully closed in design except that the top side wall and the bottom are air vents. The capacitor resistor module 20 is connected with the water-air heat exchanger 40 at the air inlet 211 at the top of the capacitor resistor module 20 by bolt connection, and the capacitor resistor module 20 is connected with the base module 10 at the air outlet at the bottom of the capacitor resistor module 20 by bolt connection or welding process connection, so that the cold air blown out by the water-air heat exchanger 40 is used for heat dissipation of the capacitor.

[0055] As shown in Figure 7 the utility model, the air inlet 211 for docking the water-air heat exchange shell 410 is arranged on the upper side of the capacitor resistor shell 210, the air inlet 211 is a hollow structure on the side wall, and the bottom of the capacitor resistor shell 210 is not provided with a solid structure for air outlet. As shown by arrows in Figure 7 , the air discharged from the water-air heat exchanger 40 enters horizontally from the air inlet 211 at the top of the side wall of the capacitor resistor shell 210 and is discharged vertically downward from the bottom of the capacitor resistor shell 210.

[0056] The upper part of the capacitor resistor shell 210 is provided with a guide inclined surface 212, and the included angle between the guide inclined surface 212 and the horizontal plane is 30-60 degrees. When the air directly impacts on the guide inclined surface 212 after entering from the air inlet 211, the guide inclined surface 212 is used for guiding the airflow entering from the side to flow downward, and the guide inclined surface 212 makes the air change direction more smoothly. It should be noted that the guide inclined surface 212 can be a plane arranged obliquely or an arc-shaped curved surface, and these specific implementation forms should be included in the protection scope of the utility model.

[0057] In order to be docked with the water-air heat exchanger 40, a protruding part is arranged on the upper part of the capacitor resistor shell 210, the protruding part is closer to the water-air heat exchanger 40, and the air inlet 211 is arranged on the protruding part.

[0058] As shown in Figure 4 , the power module 30 of the utility model comprises a power shell 310, a liquid cooling plate 320, an IGBT assembly 330, a module laminated busbar 340 and an input connecting plate 350. The power shell 310 is a thin shell structure, and the power shell 310 is provided with an air duct for airflow. The liquid cooling plate 320 is installed in the power shell 310, and the liquid cooling plate 320 is close to one of the side walls of the power shell 310. The IGBT assembly 330 is installed in the liquid cooling plate 320 in heat conduction mode. The liquid cooling plate 320 is internally provided with cooling liquid, and the heat generated by the IGBT assembly 330 is transferred to the cooling liquid in the liquid cooling plate 320, and the cooling liquid carries out the heat when flowing out.

[0059] The input connecting plate 350 is used to conductively connect the AC power supply, conductively connect the IGBT assembly 330 to the AC power supply, and conductively connect the IGBT assembly 330 to the DC busbar 220 through the module stack busbar 340. The IGBT assembly 330 is used to rectify the AC power and input the capacitor-resistor module 20 to convert the AC power to DC power. The power module 30 is provided in three, and each power module 30 is connected to one phase of the three-phase power.

[0060] The main components in the power module 30 are the IGBT assembly 330, the driving board, the control board, etc., and the module is fully sealed except that the lower base of the power shell 310 and the upper base of the module are provided with air vents. The IGBT assembly 330 is installed on one side or both sides of the liquid cooling plate 320, and the liquid cooling plate 320 carries away most of the heat through the external cooling medium. The IGBT assembly 330 carries away the rest of the heat including the heat of the driving board, the control board, etc. through the module base air vents to the water-air heat exchanger. According to the different power sizes, each rectifier unit module usually contains 3 power modules or 6 power modules, that is, one power module 30 is connected to one phase of the three-phase power or two power modules 30 are connected to one phase of the three-phase power.

[0061] As shown in Figure 1 The connecting channel module 50 is provided between the power module 30 and the water-air heat exchanger 40, and is connected to the power module 30 below and to the water-air heat exchanger 40 above. Figure 5 As shown in

[0062] The top end of the top base 510 is connected to the bottom of the water-air heat exchanger shell 410, and the top end of each power module 30 is fixed to the bottom of the bottom base 520. The connecting channel module 50 serves as an adapter structure to converge the air of the three power modules 30 and input the air to the water-air heat exchanger 40.

[0063] The connecting channel module 50 is made of steel plate welding, and the bottom base 520 is connected to the power module 30 by bolts. The number and size of the bottom base 520 are matched with the power module 30. The top base 510 is connected to the water-air heat exchanger 40 by bolts, and the size of the top base 510 is matched with the heat exchange plate of the water-air heat exchanger 40. The connecting channel module 50 serves to support the water-air heat exchanger and connect the air duct.

[0064] The power shell 310 comprises a module upper base 311, a module lower base 312, a front insulating baffle 313, a rear insulating baffle 314, a first side cover plate 315, and a second side cover plate 316 which is detachably installed, and the modules are fixed to each other and connected with the liquid cooling plate 320. Figure 4 As shown in the figure, four side edges of the first side cover plate 315 are respectively provided with folded edges, and the four folded edges are respectively fixedly connected to the module upper base 311, the module lower base 312, the front insulating baffle 313, and the rear insulating baffle 314 to form a groove-shaped structure, and the second side cover plate 316 is fixed by buckling and can contact the module upper base 311, the module lower base 312, the front insulating baffle 313, and the rear insulating baffle 314 to jointly form a cavity.

[0065] The module upper base 311 and the module lower base 312 are respectively provided with openings for airflow to pass through. Figure 4 As shown by the arrows, the airflow flows from bottom to top, passes through the openings of the module lower base 312, exchanges heat with the IGBT assembly 330, and then flows out from the openings of the module upper base 311.

[0066] In combination with Figure 8 As shown in the figure, the base module 10 comprises a main base 110 and a power base 120 which are fixedly connected and communicated, the area of the main base 110 is greater than the area of the power base 120, three power bases 120 are arranged on the main base 110, and each power base 120 supports a power module 30. The power base 120 is protrusively arranged on the upper surface of the main base 110, and the bottom end of each power shell 310 is butted to the top end of one power base 120.

[0067] The main base 110 is provided with a main base groove 111 for air of the capacitor resistance shell 210 to enter, the main base groove 111 is a groove structure, and the bottom end of the capacitor resistance shell 210 is fixed to the upper edge of the main base groove 111. The sidewall of the main base groove 111 is provided with air guide holes 112, the air discharged from the capacitor resistance module 20 enters the main base groove 111, and then enters the power base 120 from the air guide holes 112 of the sidewall of the main base groove 111 and continues to enter the power module 30.

[0068] The number of the air guide holes 112 is more than three, so that the air in the main base groove 111 is uniformly distributed and then uniformly enters each power base 120.

[0069] In order to improve the structural strength, a channel steel is arranged around the base module 10 to provide more stable support. The base module 10 has high strength and is convenient for overall transportation and installation.

[0070] The base module 10 is formed by welding steel plates. The main base 110 and the bottom ventilation openings of the capacitor and resistor module 20 are connected by bolts or welding processes. The power base 120 and the bottom ventilation openings of the power module 30 are connected by bolts, and the internal air ducts are connected to form a circulating air duct. The number and size of the power modules 30 match those of the power base 120.

[0071] Lifting parts and module fixing holes are provided at the four corners of the base module 10, and threaded holes are provided on the lifting parts, on which lifting rings can be installed for hoisting. They are welded into one body with the main base, facilitating the transportation and installation of the entire module. The base module 10 connects all parts into one body and can bear the weight of the entire module.

[0072] In this utility model, both the liquid cooling plate 320 and the heat exchange plate '430 require an external cold source to supply coolant. The liquid cooling plate 320 and the heat exchange plate 430 are respectively connected to the same liquid cooling source through their respective pipes.

[0073] The total length formed by arranging the three power modules 30 is less than the length of the capacitor and resistor module 20. As shown in > Figure 3 the figure, the total length formed by arranging the three power modules 30 is L1, and the length of the capacitor and resistor module 20 is L2, where L1 < L2. The capacitor and resistor module 20 has a larger space to install the capacitor 230 and the resistor 240.

[0074] [[ID=...]]The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rectifier unit module, characterized in that, Includes a base module (10) on which a capacitor-resistor module (20) and a power module (30) are mounted, and a water-air heat exchanger (40) is mounted on the top of the capacitor-resistor module (20) and / or the power module (30). The air ducts inside the water-air heat exchanger (40), the capacitor-resistor module (20), the base module (10), and the power module (30) are connected end to end to form a circulating air duct. The water-air heat exchanger (40) includes a water-air heat exchange shell (410), a fan (420), and a heat exchange plate (430). The water-air heat exchange shell (410) is provided with a duct for airflow. The fan (420) is used to provide power so that the air in the power module (30) is cooled by passing through the heat exchange plate (430). The cooled air enters the capacitor-resistor module (20) and enters the power module (30) from the capacitor-resistor module (20) through the base module (10).

2. The rectifier unit module according to claim 1, characterized in that, The capacitor-resistor module (20) includes a capacitor-resistor housing (210), a DC multilayer busbar (220), a capacitor (230), and a resistor (240). The capacitor-resistor housing (210) and the DC multilayer busbar (220) together form an air duct for airflow. The capacitor (230) and the resistor (240) are configured in a one-to-one correspondence and are respectively installed on both sides of the DC multilayer busbar (220); The capacitors (230) are arranged in an array in the air duct.

3. The rectifier unit module according to claim 2, characterized in that, The upper side of the capacitor resistor housing (210) is provided with an air inlet (211) for connecting to the water-air heat exchange housing (410). The upper part of the capacitor resistor housing (210) is provided with a guide slope (212), which is used to guide the airflow entering from the side to turn downward.

4. The rectifier unit module according to claim 2, characterized in that, The power module (30) includes a power housing (310), a liquid cooling plate (320), an IGBT assembly (330), a module stack busbar (340), and an input connection plate (350). The power housing (310) is provided with an air duct for airflow. The IGBT assembly (330) is thermally mounted on the liquid cooling plate (320). The input connection board (350) is used for conductive connection to AC power supply, and the IGBT assembly (330) is conductively connected to the DC stacked busbar (220) through the module stacked busbar (340).

5. The rectifier unit module according to claim 4, characterized in that, A connection channel module (50) is provided between the power module (30) and the water-air heat exchanger (40). The connection channel module (50) includes a top base (510) and a bottom base (520) that are fixedly connected to each other. The top end of the bottom base (520) is fixedly connected to the top base (510). The top of the top base (510) is connected to the bottom of the water-air heat exchange shell (410); the top of each power module (30) is fixed to the bottom of the bottom base (520).

6. The rectifier unit module according to claim 4, characterized in that, The power housing (310) includes a module upper base (311) that is fixed to each other and connected to the liquid cooling plate (320), a module lower base (312), a front insulating baffle (313), a rear insulating baffle (314), a first side cover (315), and a second side cover (316) that can be detachably installed.

7. The rectifier unit module according to claim 4, characterized in that, The base module (10) includes a main base (110) and a power base (120) that are fixedly connected to each other. The main base (110) is provided with a main base groove (111) for air to enter the capacitor and resistor housing (210). The side wall of the main base groove (111) is provided with air guide holes (112). The power base (120) protrudes from the upper surface of the main base (110), and the bottom end of each power housing (310) is connected to the top end of one of the power bases (120).

8. The rectifier unit module according to claim 7, characterized in that, Channel steel is provided around the base module (10).

9. The rectifier unit module according to claim 4, characterized in that, The liquid cooling plate (320) and the heat exchange plate (430) are respectively connected to the same liquid cooling source.

10. The rectifier unit module according to claim 1, characterized in that, The total length of the three power modules (30) arranged together is less than the length of the capacitor-resistor module (20).

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