Split power unit and unit cabinet system

Abstract

The utility model provides a kind of split type power unit and unit cabinet system, including function module and the capacitor module independent of function module;Function module includes first shell, cooling assembly being arranged along the side of first shell and the functional device being housed in first shell, cooling assembly is used to heat dissipation to functional device, first shell is formed with the airflow passage allowing cooling airflow to flow through cooling assembly, airflow passage penetrates the opposite sides of first shell;Capacitor module is electrically connected with function module, function module and capacitor module are arranged in front and back in the direction of cooling airflow, and capacitor module is relative to function module and is arranged in transverse direction staggered, so that capacitor module and cooling assembly are mutually avoided in the direction of cooling airflow.The utility model guarantees capacitor body and cooling assembly independent high-efficiency heat dissipation while effectively controlling unit overall volume, improves the space utilization of power unit and heat dissipation reliability.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter manufacturing, and in particular to a split power unit and unit cabinet system. Background Technology

[0002] The power unit in existing frequency converters typically includes a DC capacitor, IGBT (Insulated Gate Bipolar Transistor) devices, input diodes, and a control circuit board. To reduce the length of the connecting cables between components and avoid increasing stray inductance, all electrical components are often placed in a single housing. However, as the output current of the power unit increases, the required DC capacitor value also increases, resulting in an excessively large and heavy unit, which increases the difficulty of assembly and transportation. Furthermore, during system assembly, a certain distance is often reserved between power units, serving both as operating space during installation and for insulation between units, but this leads to wasted internal system space.

[0003] Existing power units have an integrated structure, which creates a conflict in the space arrangement of capacitors and cooling airflow. Hot air from the IGBT heatsink cannot directly blow on the capacitors. To avoid overheating the capacitors, placing them on the heatsink intake side would increase the unit's air resistance, requiring larger and more numerous fans to meet the cooling airflow requirements. If the capacitor and heatsink airflow are completely separated, the dedicated airflow would significantly increase the overall size of the unit. Utility Model Content

[0004] This utility model provides a split power unit and unit cabinet system, which can solve the problem of mutual interference between capacitor heat dissipation and heat sink heat dissipation in the integrated layout of capacitor module and functional module in existing power units. While ensuring independent and efficient heat dissipation of capacitor body and cooling components, it effectively controls the overall volume of the control unit and improves the space utilization and heat dissipation reliability of the power unit.

[0005] To address the aforementioned technical problems, this utility model provides a split-type power unit, including a functional module and a capacitor module independent of the functional module. The functional module includes a first housing, a cooling assembly disposed along one side of the first housing, and functional devices housed within the first housing. The cooling assembly dissipates heat from the functional devices. An airflow channel is formed on the first housing, allowing cooling airflow to pass through the cooling assembly, and the airflow channel extends through opposite sides of the first housing. The capacitor module is electrically connected to the functional module. In the cooling airflow direction, the functional module and the capacitor module are arranged front-to-back, and the capacitor module is offset laterally relative to the functional module, so that the capacitor module and the cooling assembly avoid each other in the cooling airflow direction. Optionally, the side of the first housing facing the capacitor module is made of insulating material; more preferably, the entire first housing is made of insulating material.

[0006] The split power unit provided by this utility model breaks through the limitations of traditional integrated layouts by independently setting up functional modules and capacitor modules. This avoids the capacitor modules and functional devices occupying space within the housing, providing a basis for designing heat dissipation structures for each separately. The design of an airflow channel along one side of the first housing and penetrating the housing ensures that cooling airflow flows directionally through the cooling component, efficiently removing heat generated by functional devices (such as IGBTs and rectifier diodes) and guaranteeing their heat dissipation efficiency. The flexible layout of the functional modules and capacitor modules arranged in a front-to-back manner along the cooling airflow direction allows for selection of their order based on actual heat dissipation requirements, adapting to different application scenarios. Simultaneously, the capacitor modules are staggered laterally relative to the functional modules, ensuring that the capacitor modules and cooling components avoid each other in the cooling airflow direction. This design prevents mutual interference between the cooling airflow of the functional modules and capacitor modules, while fully utilizing the insulation gap between them as a cooling airflow channel. This effectively controls the overall size of the power unit, balancing heat dissipation reliability and space compactness.

[0007] Furthermore, this split power unit also includes an insulating plate, which is vertically positioned between the functional module and the capacitor module. The functional module and the capacitor module are respectively mounted on opposite sides of the insulating plate. A first ventilation opening is provided on the insulating plate corresponding to the position of the cooling component, and a second ventilation opening is also provided on the insulating plate corresponding to the misaligned portion of the capacitor module relative to the functional module. In this design, the core function of the insulating plate is to achieve physical isolation and electrical insulation between the functional module and the capacitor module, avoiding the risk of leakage due to excessive distance between them; by providing the first ventilation opening corresponding to the cooling component, it ensures that the cooling airflow can pass through the insulating plate, avoiding the insulation plate blocking the airflow path of the cooling component and ensuring the continuity of heat dissipation of the cooling component; by providing the second ventilation opening corresponding to the misaligned portion of the capacitor module, the misaligned area of ​​the capacitor module can be introduced with airflow through the opening, improving the heat dissipation efficiency of the capacitor module; at the same time, the insulating plate provides a unified installation benchmark for the functional module and the capacitor module, avoiding misalignment failure due to installation deviation, and further enhancing structural stability.

[0008] Furthermore, the insulating plate has at least two second ventilation openings extending vertically and spaced apart. The space between the two second ventilation openings is configured as an electrical connection channel for electrically connecting the functional module and the capacitor module. By setting at least two vertically spaced second ventilation openings, the airflow can be controlled, and air can be delivered to different areas of the misaligned portion of the capacitor module, improving the uniformity of capacitor heat dissipation. By setting the electrical connection channel, the space of the insulating plate can be rationally utilized, eliminating the need to reserve additional electrical connection space outside the insulating plate. Electrical connection structures (such as wires and copper busbars) can be arranged through the electrical connection channel, which shortens the electrical connection path between the functional module and the capacitor module and avoids the electrical connection structure competing with the ventilation openings for space. This achieves space reuse between the heat dissipation openings and the electrical connection channel, further improving the compactness of the power unit.

[0009] Furthermore, the capacitor module is positioned behind the functional module in the direction of cooling airflow, and the functional module avoids the area behind the cooling components along the direction of cooling airflow. This design prevents the high-temperature airflow from the cooling components from affecting the heat dissipation of the capacitor module, and also avoids the need to set up a separate fan for the capacitor module to increase the cooling airflow.

[0010] Furthermore, the cooling assembly includes a first heat sink and a second heat sink arranged side-by-side in a vertical direction. Functional devices include an IGBT module and a rectifier diode. The first heat sink is attached to the IGBT module, and the second heat sink is attached to the rectifier diode. Both the first and second heat sinks have heat sink fins extending in the direction of the cooling airflow. Dedicated heat sinks are matched to the IGBT module and the rectifier diode respectively, avoiding uneven heat dissipation caused by excessive localized heat generation in a single heat sink. By arranging the first and second heat sinks side-by-side in a vertical direction, the height space of the first housing is fully utilized, avoiding the heat sinks occupying space in the lateral direction. The design of the heat sink fins extending in the direction of the cooling airflow allows them to be parallel to the airflow direction, reducing airflow resistance and improving the heat exchange efficiency between the airflow and the heat sink, further enhancing the heat dissipation capacity of the cooling assembly.

[0011] Furthermore, there are two first heat sinks and one second heat sink, with the second heat sink positioned between the two first heat sinks. Two IGBT modules are respectively attached to the two first heat sinks, and the rectifier diode between the two IGBT modules is attached to the second heat sink. This symmetrical arrangement of the two first heat sinks and the intermediate second heat sink ensures a balanced overall structure for the cooling assembly, facilitating processing and assembly. The design of each IGBT module being attached to a first heat sink ensures that each high-heat-generating IGBT module has an independent heat dissipation carrier. Additionally, by placing the rectifier diode between the two IGBT modules and attaching it to the second heat sink, a compact spatial layout of the functional components is achieved, and the second heat sink efficiently dissipates the heat from the rectifier diode.

[0012] Furthermore, the functional components also include a busbar, flying capacitors, a control circuit board, a driver board, and a first copper busbar. Within the first housing, the busbar is positioned on the surface of the IGBT module away from the first heatsink. Flying capacitors are symmetrically arranged on both sides of the busbar and electrically connected to the IGBT module. The control circuit board is positioned on the side of the rectifier diode away from the second heatsink and is arranged parallel to the rectifier diode. The driver board is sandwiched between the control circuit board and the rectifier diode, and is electrically connected to the control circuit board, the rectifier diode, and the IGBT module. The first copper busbar is positioned on the side of the first housing away from the cooling components. One end of the first copper busbar is inside the first housing for electrical connection to the IGBT module, and the other end extends through the first housing for electrical connection to the capacitor module. This design allows the control circuit board, driver board, and rectifier diode to form a stacked structure, fully utilizing the space of the first housing. By arranging the first copper busbar along the side of the housing away from the cooling components and extending through the housing, the first copper busbar avoids competing for space with the cooling components, while simultaneously achieving external electrical connection between the functional module and the capacitor module. The through-type design ensures connection stability and prevents loosening.

[0013] Furthermore, the capacitor module includes a second housing, a capacitor body, and a second copper busbar connected to the capacitor body. The capacitor body is housed within the second housing, and the second copper busbar is fixedly connected to the air inlet side of the second housing along the cooling airflow direction, forming a support structure for the capacitor body. The second copper busbar is electrically connected to the functional module. Exhaust openings are formed on both sides of the second housing along the cooling airflow direction. The second housing provides physical protection for the capacitor body, and the second copper busbar, fixed to the air inlet side of the second housing and serving as a support structure, achieves the dual functions of conductivity and support, eliminating the need for additional support components, simplifying the capacitor module structure, and avoiding obstruction of cooling airflow. By electrically connecting the second copper busbar to the functional module, the capacitor module ensures stable capacitor compensation for the functional module. By providing exhaust openings on both sides of the second housing, cooling airflow can enter the housing from the air inlet side and exit from the exhaust openings on both sides, forming a heat dissipation path for the capacitor body, preventing heat accumulation in the capacitor body within the enclosed space, and ensuring the working stability of the capacitor. Optionally, the aforementioned exhaust opening is divided into a first section and a second section. Along the direction of the cooling airflow, the first section is opposite to the functional module, while the second section is opposite to the offset area of ​​the capacitor module relative to the functional module. The width of the first section is greater than the width of the second section to facilitate sufficient airflow in the capacitor module, thereby improving the cooling effect. Optionally, the second copper busbar is grounded as the potential neutral point of the power unit.

[0014] Furthermore, the capacitor body can be a single unit, with its electrodes electrically connected to the second copper busbar; or multiple capacitor bodies can be present, with the same polarity electrode of each unit electrically connected to the second copper busbar, and these multiple capacitor bodies arranged at intervals along the extension direction of the second copper busbar to form one or more rows. This design provides two capacitor configuration options, allowing for customization of capacitors according to different power requirements. In the multiple capacitor body configuration, the connection to the second copper busbar via electrodes of the same polarity increases the total capacity of the capacitor module. The spaced arrangement along the extension direction of the second copper busbar ensures that each capacitor body is exposed to cooling airflow, avoiding uneven heat dissipation caused by dense arrangement, thus balancing capacity requirements and heat dissipation reliability.

[0015] This utility model also provides a unit cabinet system, including a cabinet and the split power unit described in any of the above claims, wherein the split power unit is disposed within the cabinet; along the cooling airflow path from front to back, an air inlet is provided on the front side of the cabinet corresponding to the air inlet end of the split power unit, and a collecting air duct is provided on the rear side of the cabinet; the air inlet is opposite to the air inlet ends of the cooling components and capacitor modules, and the collecting air duct is connected to the air outlet ends of the cooling components and capacitor modules to collect the heat-absorbing airflow passing through the cooling components and capacitor modules; an air outlet is provided at the top of the cabinet, and the air outlet is connected to the end of the collecting air duct away from the split power unit, and a fan is provided at the air outlet to extract the heat-absorbing airflow out of the cabinet. The above design of this unit cabinet system constructs a complete heat dissipation structure: the fan causes the low-temperature airflow to enter from the air inlet on the front side of the cabinet, flows directionally through the cooling components and capacitor modules of the split power unit, absorbs heat and becomes heat-absorbing airflow, and then is collected by the collecting air duct to the top air outlet and discharged from the cabinet. By aligning the air inlet with the air inlets of the cooling components and capacitor modules, the system ensures that low-temperature airflow can precisely enter the heat dissipation paths of both components, avoiding airflow waste. By setting up a converging airflow channel to gather heat-absorbing airflow, the system prevents heat-absorbing airflow from stagnating at the rear of the cabinet, thus preventing heat from returning to the power units. The system integrates the heat dissipation paths of the separate power units into the cabinet system, improving heat dissipation efficiency. At the same time, multiple power units can be integrated into the same cabinet, achieving a compact system-level layout.

[0016] Furthermore, the number of separate power units is one or more, wherein multiple separate power units are arranged in an array along the height and / or width of the cabinet, and the cooling components of the separate power units are staggered in the lateral direction relative to adjacent separate power units, thus avoiding the area behind the cooling components of the functional modules along the cooling airflow direction. This design makes full use of the cabinet's three-dimensional space to achieve multi-unit integration and meet high power output requirements; at the same time, it continues the design concept of staggered heat dissipation of individual power units, ensuring the heat dissipation efficiency of each power unit, while eliminating the need to reserve excessive gaps between adjacent units, thus improving the space utilization of the cabinet. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the functional modules;

[0019] Figure 2 This is a schematic diagram of the capacitor module;

[0020] Figure 3 This is a schematic diagram of a split power unit;

[0021] Figure 4 This is a schematic diagram of the functional modules after the first housing has been removed;

[0022] Figure 5 This is a front view of two separate power units;

[0023] Figure 6 This is a schematic diagram of an insulating board;

[0024] Figure 7 This is a top view of the unit cabinet system;

[0025] Figure 8 This is a schematic diagram of the unit cabinet system.

[0026] Explanation of icon numbers:

[0027] 1. Functional module; 11. First housing 11; 12. Cooling assembly;

[0028] 121. First radiator; 122. Second radiator;

[0029] 131. IGBT module; 132. Rectifier diode; 133. Busbar;

[0030] 134. Flying capacitor; 135. Control circuit board; 137. First copper busbar;

[0031] 2. Capacitor module; 21. Second housing; 22. Capacitor body;

[0032] 23. Second copper busbar;

[0033] 3. Insulating board; 31. First ventilation opening; 32. Second ventilation opening;

[0034] 33. Electrical connection channel;

[0035] 4. Cabinet; 41. Air inlet; 42. Collective airflow duct;

[0036] 43. Air vent;

[0037] 50. Split-type power unit. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form.

[0040] Figure 1 This is a schematic diagram of functional module 1, showing the overall structure of functional module 1; Figure 2 This is a schematic diagram of capacitor module 2, showing the overall structure of capacitor module 2; Figure 3 This is a schematic diagram of a split power unit 50, showing the specific structure of a split power unit 50 in a part of the unit cabinet system; Figure 4 This is a schematic diagram of the functional module 1 with the first housing 11 removed, showing the internal structure of the functional module 1; Figure 5 This is a front view of two separate power units 50, showing two separate power units 50 side by side; Figure 6 This is a schematic diagram of insulating plate 3, showing a specific structure of insulating plate 3.

[0041] See Figures 1 to 3According to one aspect of the present invention, a split power unit 50 is provided, including a functional module 1 and a capacitor module 2 independent of the functional module 1. The functional module 1 includes a first housing 11, a cooling assembly 12 disposed along one side of the first housing 11, and functional devices housed within the first housing 11. The cooling assembly 12 is used to dissipate heat from the functional devices. An airflow channel is formed on the first housing 11 to allow cooling airflow through the cooling assembly 12, and the airflow channel passes through opposite sides of the first housing 11. The capacitor module 2 is electrically connected to the functional module 1. The functional module 1 and the capacitor module 2 are arranged in a front-to-back configuration in the cooling airflow direction, and the capacitor module 2 is offset from the functional module 1 in the lateral direction, so that the capacitor module 2 and the cooling assembly 1 avoid each other in the cooling airflow direction. Optionally, the side of the first housing 11 facing the capacitor module 2 is made of an insulating material; more preferably, the entire first housing 11 is made of an insulating material.

[0042] The split power unit 50 provided by this utility model breaks through the limitations of traditional integrated layouts by independently setting up the functional module 1 and the capacitor module 2. This avoids the capacitor module 2 and the functional devices occupying space within the housing, providing a basis for designing heat dissipation structures for each separately. The airflow channel design of the cooling component 12, which is set along one side of the first housing 11 and penetrates the housing, ensures that the cooling airflow can flow directionally through the cooling component 12, efficiently removing the heat generated by the functional devices and ensuring the heat dissipation efficiency of the functional devices. The flexible layout of the functional module 1 and the capacitor module 2 arranged in a front-to-back manner in the direction of cooling airflow allows the order of the two to be selected according to actual heat dissipation requirements to adapt to different application scenarios. At the same time, the capacitor module 2 is staggered in the lateral direction relative to the functional module 1, so that the capacitor module 2 and the cooling component 1 avoid each other in the direction of cooling airflow. This design not only prevents the cooling airflow of the functional module 1 and the capacitor module 2 from interfering with each other, but also makes full use of the insulation gap between the functional module 1 and the capacitor module 2 as a channel for cooling airflow, effectively controlling the overall size of the power unit and balancing heat dissipation reliability and space compactness.

[0043] According to Figure 3 and Figure 6In the embodiment shown, the split power unit 50 further includes an insulating plate 3, which is vertically disposed between the functional module 1 and the capacitor module 2. The functional module 1 and the capacitor module 2 are respectively installed on both sides of the insulating plate 3. A first ventilation opening 31 is provided on the insulating plate 3 corresponding to the position of the cooling component 12. A second ventilation opening 32 is also provided on the insulating plate 3, which corresponds to the misaligned portion of the capacitor module 2 relative to the functional module 1. In this design, the core function of the insulating plate 3 is to achieve physical isolation and electrical insulation between the functional module 1 and the capacitor module 2, avoiding the risk of leakage due to their close proximity. By setting the first ventilation opening 31 corresponding to the cooling component 12, the cooling airflow is ensured to pass through the insulating plate 3, preventing the cooling component 12 from being blocked by the insulating plate 3 and ensuring the continuity of heat dissipation of the cooling component 12. By setting the second ventilation opening 32 corresponding to the misaligned part of the capacitor module 2, the misaligned area of ​​the capacitor module 2 can be introduced with airflow through the opening, improving the heat dissipation efficiency of the capacitor module 2. At the same time, the insulating plate 3 provides a unified installation benchmark for the functional module 1 and the capacitor module 2, avoiding misalignment failure due to installation deviation, and further enhancing structural stability.

[0044] In some specific embodiments, the insulating plate 3 has at least two second ventilation openings 32 extending vertically and spaced apart. The space between the two second ventilation openings 32 is configured to have an electrical connection channel 33 for electrically connecting the functional module 1 and the capacitor module 2. By setting at least two vertically spaced second ventilation openings 32, the airflow can be controlled, and air can be delivered to different areas of the misaligned portion of the capacitor module 2, improving the uniformity of capacitor heat dissipation. By setting the electrical connection channel 33, the space of the insulating plate 3 can be rationally utilized, eliminating the need to reserve additional electrical connection space outside the insulating plate 3. Electrical connection structures (such as wires and copper busbars) can be arranged through the electrical connection channel 33, which shortens the electrical connection path between the functional module 1 and the capacitor module 2 and avoids the electrical connection structure competing with the ventilation opening for space. This achieves space reuse between the heat dissipation opening and the electrical connection channel 33, further improving the compactness of the power unit.

[0045] In some more specific embodiments, the capacitor module 2 is positioned after the functional module 1 in the direction of cooling airflow, and the capacitor module 2 avoids the area behind the cooling assembly 12 along the direction of cooling airflow. This design prevents the high-temperature airflow discharged from the cooling assembly 12 from affecting the heat dissipation of the capacitor module 2, and also avoids the need to set up a separate fan for the capacitor module 2 to increase the cooling airflow.

[0046] In some further embodiments, reference is made to Figure 4The cooling assembly 12 includes a first heat sink 121 and a second heat sink 122 arranged side-by-side in a vertical direction. Functional components include an IGBT module 131 and a rectifier diode 132. The first heat sink 121 is attached to the IGBT module 131, and the second heat sink 122 is attached to the rectifier diode 132. Both the first heat sink 121 and the second heat sink 122 have heat sink fins extending in the direction of the cooling airflow. Dedicated heat sinks are matched to the IGBT module 131 and the rectifier diode 132 respectively, avoiding uneven heat dissipation due to excessive localized heat generation from a single heat sink. By arranging the first heat sink 121 and the second heat sink 122 side-by-side in a vertical direction, the height space of the first housing 11 is fully utilized, avoiding the heat sinks occupying space in the lateral direction. The design of the heat sink fins extending in the direction of the cooling airflow allows them to be parallel to the airflow direction, reducing the resistance of the airflow through the heat sink fins, improving the heat exchange efficiency between the airflow and the heat sink fins, and further enhancing the heat dissipation capacity of the cooling assembly 12.

[0047] Further reference Figure 4 In the illustrated embodiment, there are two first heat sinks 121 and one second heat sink 122, with the second heat sink 122 positioned between the two first heat sinks 121. Two IGBT modules 131 are respectively attached to the two first heat sinks 121, and a rectifier diode 132 between the two IGBT modules 131 is attached to the second heat sink 122. The symmetrical arrangement of the two first heat sinks 121 and the intermediate second heat sink 122 ensures a balanced overall structure for the cooling assembly 12, facilitating processing and assembly. The design of attaching the two IGBT modules 131 to the first heat sinks 121 ensures that each high-heat-generating IGBT module 131 has an independent heat dissipation carrier. Furthermore, by positioning the rectifier diode 132 between the two IGBT modules 131 and attaching it to the second heat sink 122, a compact spatial layout of the functional devices is achieved, and the second heat sink 122 efficiently dissipates the heat from the rectifier diode 132.

[0048] Specifically, the functional components also include a busbar 133, a flying capacitor 134, a control circuit board 135, a driver board, and a first copper busbar 137. Inside the first housing 11, the busbar 133 is disposed on the surface of the IGBT module 131 away from the first heat sink 121. The flying capacitors 134 are symmetrically arranged on both sides of the busbar 133 and electrically connected to the IGBT module 131. The control circuit board 135 is disposed on the side of the rectifier diode 132 away from the second heat sink 122 and is arranged parallel to the rectifier diode 132. The driver board is sandwiched between the control circuit board 135 and the rectifier diode 132, and is electrically connected to the control circuit board 135, the rectifier diode 132, and the IGBT module 131 respectively. The first copper busbar 137 is disposed on the side of the first housing 11 away from the cooling assembly 12. One end of the first copper busbar 137 is in the first housing 11 for electrical connection to the IGBT module 131, and the other end of the first copper busbar 137 extends out of the first housing 11 for electrical connection to the capacitor module 2. This design allows the control circuit board 135, the driver board, and the rectifier diode 132 to form a stacked structure, making full use of the space of the first housing 11. By setting the first copper busbar 137 to be arranged along the side of the housing away from the cooling component 12 and to penetrate the housing, the first copper busbar 137 and the cooling component 12 are prevented from competing for space. At the same time, the external electrical connection between the functional module 1 and the capacitor module 2 is realized, and the through-type design ensures the stability of the connection and prevents the connection from becoming loose.

[0049] In some embodiments, the capacitor module 2 includes a second housing 21, a capacitor body 22, and a second copper busbar 23 connected to the capacitor body 22; the capacitor body 22 is housed in the second housing 21, and the second copper busbar 23 is fixedly connected to the air inlet side of the second housing 21 along the cooling airflow direction to form a support structure for the capacitor body 22; the second copper busbar 23 is electrically connected to the functional module 1; exhaust openings are formed on both sides of the second housing 21 along the cooling airflow direction. The second housing 21 provides physical protection for the capacitor body 22. The second copper busbar 23 is fixed to the air inlet side of the second housing 21 and serves as a support structure, achieving the dual functions of conductivity and support. This eliminates the need for additional support components, simplifying the structure of the capacitor module 2 and preventing obstruction of cooling airflow. By electrically connecting the second copper busbar 23 to the functional module 1, stable capacitor compensation from the capacitor module 2 is ensured. Exhaust openings on both sides of the second housing 21 allow cooling airflow to enter the housing from the air inlet side and exit from the exhaust openings on both sides, forming a heat dissipation path for the capacitor body 22. This prevents heat accumulation in the capacitor body 22 within the enclosed space and ensures the stability of the capacitor's operation. Optionally, the exhaust openings are divided into a first section and a second section. Along the direction of the cooling airflow, the first section is opposite to the functional module 1, while the second section is opposite to the offset area of ​​the capacitor module 2 relative to the functional module 1. The width of the first section is greater than the width of the second section to facilitate sufficient airflow within the capacitor module, thereby improving the cooling effect. Optionally, the second copper busbar 23 can be grounded as the potential neutral point of the power unit.

[0050] In some more specific embodiments, the capacitor body 22 is a single entity, with its electrodes electrically connected to the second copper busbar 23; or there are multiple capacitor bodies 22, with the same polarity electrode of each capacitor body 22 electrically connected to the second copper busbar 23, and the multiple capacitor bodies 22 are arranged at intervals along the extension direction of the second copper busbar 23 to form one or more rows. This design provides two capacitor configuration schemes, allowing for customization of capacitors according to different power requirements. In the multiple capacitor body 22 scheme, the connection to the second copper busbar 23 via the same polarity electrode increases the total capacity of the capacitor module 2. The arrangement at intervals along the extension direction of the second copper busbar 23 ensures that each capacitor body 22 can contact the cooling airflow, avoiding uneven heat dissipation caused by dense arrangement, thus balancing capacity requirements and heat dissipation reliability.

[0051] Figure 7 This is a top view of the unit cabinet system, showing the top structure of the unit cabinet system; Figure 8 The schematic diagram of the unit cabinet system shows the overall structure of the unit cabinet system and the arrangement of a split power unit 50 therein.

[0052] According to another aspect of the present invention, a split power unit 50 and a unit cabinet system are provided, including a cabinet 4 and the split power unit 50 described in any of the above claims. The split power unit 50 is disposed inside the cabinet 4. Along the path of cooling airflow from front to back, an air inlet 41 is provided on the front side of the cabinet 4 corresponding to the air inlet end of the split power unit 50, and a collecting air duct 42 is provided on the rear side of the cabinet 4. The air inlet 41 is opposite to the air inlet ends of the cooling component 12 and the capacitor module 2, and the collecting air duct 42 is connected to the air outlet ends of the cooling component 12 and the capacitor module 2 for gathering the heat-absorbing airflow passing through the cooling component 12 and the capacitor module 2. An air outlet 43 is provided at the top of the cabinet 4, and the air outlet 43 is connected to the end of the collecting air duct 42 away from the split power unit 50. A fan is provided at the air outlet 43 for drawing the heat-absorbing airflow out of the cabinet 4. The above design of the unit cabinet system constructs a complete heat dissipation structure: the fan causes the low-temperature airflow to enter from the air inlet 41 on the front side of the cabinet 4, flow directionally through the cooling component 12 and capacitor module 2 of the split power unit 50, absorb heat and become heat-absorbing airflow, and then be gathered by the collection air duct 42 to the top air outlet 43 and discharged from the cabinet 4.

[0053] The unit cabinet system uses the aforementioned split power unit 50. Since the split power unit 50 has the advantages of efficient heat dissipation and compact structure, the unit cabinet system also has good quality in the corresponding aspects.

[0054] In addition, the unit cabinet system ensures that the low-temperature airflow can accurately enter the heat dissipation path of the cooling component 12 and the capacitor module 2 by setting the air inlet 41 opposite to the air inlet of the cooling component 12 and the capacitor module 2, thus avoiding airflow waste; by setting the air collection channel 42 to gather the heat-absorbing airflow, it avoids the heat-absorbing airflow from stagnating on the rear side of the cabinet 4 and prevents heat from returning to the power unit; the heat dissipation path of the split power unit 50 is integrated into the cabinet 4 system to improve heat dissipation efficiency, and multiple power units can be integrated into the same cabinet 4 to achieve a compact layout at the system level.

[0055] In some preferred embodiments, the number of split power units 50 is one or more, wherein the multiple split power units 50 are arranged in an array along the height and / or width direction of the cabinet 4, and the cooling components 12 of the split power units 50 are staggered in the lateral direction relative to the adjacent split power units 50, so as to avoid the rear area of ​​the cooling components 12 of the functional module 1 along the cooling airflow direction. This design makes full use of the three-dimensional space of the cabinet 4 to achieve multi-unit integration and meet the high power output requirements; at the same time, it continues the design concept of staggered heat dissipation of individual power units, ensuring the heat dissipation efficiency of each power unit, while eliminating the need to reserve excessive gaps between adjacent units, thus improving the space utilization of the cabinet 4.

[0056] The technical effect of this utility model is that it can solve the problem of mutual interference between capacitor heat dissipation and heat sink heat dissipation in the integrated layout of capacitor module 2 and functional module 1 in the existing power unit. While ensuring that capacitor body 22 and cooling component 12 can dissipate heat independently and efficiently, it can effectively control the overall volume of the control unit and improve the space utilization and heat dissipation reliability of the power unit.

[0057] The technical solution of this utility model separates the functional module 1 and capacitor module 2 in the power unit into two individual modules and adopts staggered installation, using the insulation gap between the two as a channel for cooling airflow. Compared with the traditional functional unit cabinet system, this design can make more efficient use of the insulation gap space in the unit cabinet system, thereby effectively reducing the size of the unit cabinet system.

[0058] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A split-type power unit, characterized in that, include: The functional module (1) includes a first housing (11), a cooling assembly (12) disposed along one side of the first housing (11), and a functional device housed within the first housing (11). The cooling assembly (12) is used to dissipate heat from the functional device. An airflow channel is formed on the first housing (11) to allow cooling airflow to pass through the cooling assembly (12). The airflow channel passes through the opposite sides of the first housing (11). A capacitor module (2) independent of the functional module (1) is electrically connected to the functional module (1). The functional module (1) and the capacitor module (2) are arranged in a front-to-back manner in the cooling airflow direction, and the capacitor module (2) is staggered in the lateral direction relative to the functional module (1), so that the capacitor module (2) and the cooling component (12) avoid each other in the cooling airflow direction.

2. The split-type power unit according to claim 1, characterized in that, It also includes an insulating plate (3), which is vertically disposed between the functional module (1) and the capacitor module (2). The functional module (1) and the capacitor module (2) are respectively installed on both sides of the insulating plate (3). A first ventilation opening (31) is provided on the insulating plate (3) corresponding to the position of the cooling component (12). A second ventilation opening (32) is also provided on the insulating plate (3) corresponding to the misaligned portion of the capacitor module (2) relative to the functional module (1).

3. The split-type power unit according to claim 2, characterized in that, The insulating plate (3) has at least two second ventilation openings (32) that extend vertically and are spaced apart. The space between the two second ventilation openings (32) is configured to have an electrical connection channel (33) for electrically connecting the functional module (1) and the capacitor module (2).

4. The split-type power unit according to claim 1, characterized in that, The capacitor module (2) is positioned after the functional module (1) in the direction of the cooling airflow, and the capacitor module (2) avoids the area behind the cooling assembly (12) in the direction of the cooling airflow.

5. The split-type power unit according to claim 1, characterized in that, The cooling assembly (12) includes a first heat sink (121) and a second heat sink (122) arranged side by side in a vertical direction. The functional device includes an IGBT module (131) and a rectifier diode (132). The first heat sink (121) is attached to the IGBT module (131), and the second heat sink (122) is attached to the rectifier diode (132). Both the first heat sink (121) and the second heat sink (122) have heat sinks extending in the direction of the cooling airflow.

6. The split-type power unit according to claim 5, characterized in that, There are two first heat sinks (121) and one second heat sink (122). The second heat sink (122) is disposed between the two first heat sinks (121). The two IGBT modules (131) are respectively attached to the two first heat sinks (121), and the rectifier diode (132) between the two IGBT modules (131) is attached to the second heat sink (122).

7. The split-type power unit according to claim 6, characterized in that, The functional components also include a busbar (133), a flying capacitor (134), a control circuit board (135), a drive board, and a first copper busbar (137). Inside the first housing (11), the busbar (133) is disposed on the surface of the IGBT module (131) away from the first heat sink (121), and the flying capacitor (134) is symmetrically arranged on both sides of the busbar (133) and electrically connected to the IGBT module (131). The control circuit board (135) is disposed on the side of the rectifier diode (132) away from the second heat sink (122) and is arranged parallel to the rectifier diode (132). The driving board is sandwiched between the control circuit board (135) and the rectifier diode (132), and the driving board is electrically connected to the control circuit board (135), the rectifier diode (132) and the IGBT module (131) respectively. The first copper busbar (137) is disposed on the side of the first housing (11) away from the cooling assembly (12). One end of the first copper busbar (137) is in the first housing (11) for electrical connection with the IGBT module (131), and the other end of the first copper busbar (137) extends out of the first housing (11) for electrical connection with the capacitor module (2).

8. The split-type power unit according to any one of claims 1 to 7, characterized in that, The capacitor module (2) includes a second housing (21), a capacitor body (22), and a second copper busbar (23) connected to the capacitor body (22). The capacitor body (22) is housed in the second housing (21), and the second copper busbar (23) is fixedly connected to the air inlet side of the second housing (21) along the cooling airflow direction to form a support structure for the capacitor body (22). The second copper busbar (23) is electrically connected to the functional module (1). The second housing (21) has exhaust openings on both sides along the direction of the cooling airflow.

9. The split-type power unit according to claim 8, characterized in that, The capacitor body (22) is a single unit, and the electrodes of the single capacitor body (22) are electrically connected to the second copper busbar (23); or There are multiple capacitor bodies (22), and the same polarity electrode of multiple capacitor bodies (22) is electrically connected to the second copper busbar (23). The multiple capacitor bodies (22) are arranged at intervals along the extension direction of the second copper busbar (23) to form one or more rows.

10. A unit cabinet system, characterized in that, Includes a cabinet (4) and a split power unit (50) according to any one of claims 1 to 9, wherein the split power unit (50) is disposed within the cabinet (4); Along the path of the cooling airflow from front to back, the front side of the cabinet (4) is provided with an air inlet (41) corresponding to the air inlet end of the split power unit (50), and the rear side of the cabinet (4) is provided with a collecting air duct (42). The air inlet (41) is opposite to the air inlet of the cooling component (12) and the capacitor module (2), and the air collection duct (42) is connected to the air outlet of the cooling component (12) and the capacitor module (2) to gather the heat-absorbing airflow passing through the cooling component (12) and the capacitor module (2). An air outlet (43) is provided at the top of the cabinet (4). The air outlet (43) is connected to the end of the air collection duct (42) away from the split power unit (50). A fan is provided at the air outlet (43) to draw the heat-absorbing airflow out of the cabinet (4).

11. The unit cabinet system according to claim 10, characterized in that, The number of the split power units (50) is one or more, wherein the multiple split power units (50) are arranged in an array along the height and / or width direction of the cabinet (4), and the cooling components (12) of the split power units (50) are staggered in the lateral direction relative to the adjacent split power units (50) to avoid the rear area of ​​the cooling components (12) of the functional module (1) along the cooling airflow direction.

Images