Converter power cabinet

Abstract

The utility model discloses a converter power cabinet, which particularly relates to the field of electrical equipment and comprises a cabinet body, and an inductance component I, a power module, a heat exchange component, an inductance component II and a bus capacitor are arranged in the cabinet body. According to the utility model, the flowing path of electric power from input to output is arranged to be a straight line, so that the length of power flow is short, the cost of the conducting bar of the whole machine is low, and since the components are arranged on the same plane, each component is easier to approach during maintenance and repair, and the components can be conveniently checked, repaired or replaced regularly; the modular design of the system can be realized more easily, each unit or module can be arranged or replaced along a straight line, the rapid expansion or adjustment of the system can be supported, so that the power cabinet is compact in structure, clear in system hierarchy and high in overall power density, in addition, modular assembly can be adopted in the cabinet body, the assembly difficulty is low, the efficiency is high, and the profit of an overall plant is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to a converter power cabinet. Background Technology

[0002] A converter power cabinet is an electrical device used to control and convert electrical energy to meet various application requirements. It is commonly used in wind power generation, photovoltaic power generation, industrial motor drives, electric vehicle charging, and rail transportation. The main function of a converter power cabinet is to convert alternating current (AC) to direct current (DC), or vice versa, while also regulating voltage and frequency.

[0003] With the rapid development of industrial technology, the market demands for the power level and power density of converters are constantly increasing. This has led to converter designs that need to handle larger currents and higher output capacity, making the overall structure more complex and increasing the size. At the same time, as the power increases, the heat generated by the converter also increases, requiring a more complex and efficient cooling system to avoid overheating. This makes the system design more complex and the size larger. To meet high power requirements, converters need complex circuits and multi-layer structures, which increases their physical size and design complexity, resulting in high manufacturing and installation and maintenance costs. Utility Model Content

[0004] The present invention provides a converter power cabinet that addresses the following problem: the existing converter power cabinets require higher power ratings and power densities, leading to a need for converters to handle larger currents and higher output capacity, which complicates the overall structure and increases the size. At the same time, as the power increases, the heat generated by the converter also increases. Furthermore, to meet the high power requirements, the converter needs complex circuitry and multi-layered structures, which increases its physical size and design complexity, resulting in high manufacturing and installation / maintenance costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a converter power cabinet, comprising: a cabinet body, wherein an inductor assembly one, a power module, a heat exchange assembly, an inductor assembly two, and a bus capacitor are disposed within the cabinet body;

[0006] The power module includes power module one, power module two, and power module three, which are arranged in order from top to bottom inside the cabinet.

[0007] The cabinet is equipped with an external AC power connection terminal 1 and an external AC power connection terminal 2. The external AC power connection terminal 1 is connected to an inductor assembly 1, and the output is connected to the external AC power connection terminal 2 via the bus capacitor, the power module and the inductor assembly 2. The external AC power connection terminal 1, the inductor assembly 1, the bus capacitor, the inductor assembly 2 and the external AC power connection terminal 2 are aligned in the vertical direction, and the bus capacitor and the power module are aligned in the horizontal direction.

[0008] In a preferred embodiment, the power flow is arranged in a top-in, bottom-out configuration. Inductor component one is located at the top of the cabinet, inductor component two is located at the bottom of the cabinet, and the bus capacitor and power module are both located in the middle of the cabinet. Their external AC connection terminal one is connected to inductor component one from the top of the cabinet, and the output terminal of inductor component two is connected to external AC connection terminal two from the bottom of the cabinet.

[0009] In a preferred embodiment, the power flow layout is a bottom-in, top-out layout. Inductor component one is located at the lower part of the cabinet, inductor component two is located at the upper part of the cabinet, and the bus capacitor and power module are both located in the middle of the cabinet. Their external AC connection terminal one is connected to inductor component one from the lower part of the cabinet, and the output terminal of inductor component two is connected to external AC connection terminal two from the upper part of the cabinet.

[0010] In a preferred embodiment, a circulating air duct is also provided inside the cabinet, and the circulating air duct runs through the cabinet. The circulating air duct includes a back air cavity of the bus capacitor, which is located on the back of the bus capacitor.

[0011] In a preferred embodiment, the air inlet of the circulating air duct is located at the bottom of the cabinet. The airflow enters through the bottom of the cabinet, then flows through the inductor assembly 2, the heat exchange assembly, the bus capacitor, and the back air cavity of the bus capacitor to the top of the cabinet. It then splits at the top of the cabinet, so that the two parts of the airflow flow back to the inductor assembly 2 from the gap between the power module and the cabinet, and the gap between the back air cavity of the bus capacitor and the inner wall of the rear side of the cabinet, respectively, to form a circulating airflow.

[0012] In a preferred embodiment, the air inlet of the circulating air duct is located at the top of the cabinet. The airflow enters through the top of the cabinet, then flows through the inductor assembly 2, the heat exchange assembly, the bus capacitor, and the back air cavity of the bus capacitor to the bottom of the cabinet. It then splits at the bottom of the cabinet, so that the two parts of the airflow flow back to the inductor assembly 2 from the gap between the power module and the cabinet, and the gap between the back air cavity of the bus capacitor and the inner wall of the rear side of the cabinet, respectively, to form a circulating airflow.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention shortens the power flow path from input to output by setting it in a straight line, resulting in lower overall conductor bus cost. Furthermore, since the components are arranged on a single plane, each component is more easily accessible during maintenance and repair, facilitating regular inspection, repair, or replacement. Additionally, the linear layout allows for easier modular design, with each unit or module arranged or replaced along the straight line, supporting rapid system expansion and adjustment. This results in a compact power cabinet structure, clear system hierarchy, and high overall power density. Moreover, modular assembly within the cabinet reduces assembly difficulty, increases efficiency, and improves the profitability of the OEM.

[0015] This invention improves the overall heat dissipation efficiency and reduces the overall heat dissipation cost by setting up a circulating air duct inside the cabinet. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the top-inlet and bottom-outlet layout and power flow of this utility model.

[0017] Figure 2 This is a schematic diagram of the bottom-inlet, top-outlet layout and power flow of this utility model.

[0018] Figure 3 This is a schematic diagram of the detailed internal layout and air duct path of this utility model, showing the top-inlet and bottom-outlet airflow.

[0019] Figure 4 This is a schematic diagram showing the detailed internal layout and air duct path of this utility model with bottom inlet and top outlet.

[0020] The attached diagram is labeled as follows: 1. Cabinet; 2. Chopper resistor; 3. Inductor assembly one; 4. Chopper module; 5. Power module; 51. Power module one; 52. Power module two; 53. Power module three; 6. Heat exchange assembly; 7. Fuse; 8. Inductor assembly two; 9. Bus capacitor; 10. External AC power connection terminal one; 11. External AC power connection terminal two; 12. Circulating air duct; 1201. Back air cavity of bus capacitor. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Refer to the instruction manual appendix Figures 1 to 4 A converter power cabinet includes: a cabinet 1, and a chopper resistor 2, an inductor assembly 3, a chopper module 4, a power module 5, a heat exchange assembly 6, a fuse 7, an inductor assembly 8, and a bus capacitor 9 disposed inside the cabinet 1.

[0023] Power module 5 includes power module one 51, power module two 52 and power module three 53, which are arranged in order from top to bottom inside the cabinet 1.

[0024] The cabinet 1 is equipped with an external AC power connection terminal 10 and an external AC power connection terminal 21. The external AC power connection terminal 10 is connected to the inductor assembly 3, and outputs to the external AC power connection terminal 21 via the bus capacitor 9, the power module 5 and the inductor assembly 28. The external AC power connection terminal 10, the inductor assembly 3, the bus capacitor 9, the inductor assembly 28 and the external AC power connection terminal 21 are aligned in the vertical direction, and the bus capacitor 9 and the power module 5 are aligned in the horizontal direction.

[0025] It should be noted that the alignment of external AC power connection terminal 10, inductor assembly 3, bus capacitor 9, inductor assembly 8, and external AC power connection terminal 11 in the vertical direction, and the alignment of bus capacitor 9 and power module 5 in the horizontal direction, indicates that the power flow layout is on a straight line. The power flow layout is the path of power flow from input to output. By setting the current path of the power flow layout to a straight line, the power flow length is minimized, simplifying electrical connections and power flow path, thereby reducing transmission loss. In addition, the short power flow length results in low overall conductor cost.

[0026] It should also be noted that the number of inductors inside both inductor assembly 3 and inductor assembly 8 can be two (depending on the number of modules). These two inductors can be in the form of two independent ordinary three-phase inductors of the same size, two three-phase inductors of the same size in a common yoke design, or a common yoke design in the upper and lower (or left and right) layers (6 small single-phase inductors + 1 large three-phase inductor). This design can achieve multifunctionality in a limited space. Integrating multiple inductors into one yoke can significantly reduce the required physical space, which is beneficial for the design of compact equipment. The shared yoke can reduce the amount of iron core material used, which reduces costs and lightens the weight of the components, making it easier to transport and install the equipment. In addition, the common yoke design can improve the electromagnetic performance of the system through tighter magnetic coupling.

[0027] It should also be noted that the fuse 7 can be installed on the front of the inductor assembly 2 8 and connected in series at the inductor assembly 2 8 input terminal. When the fuse 7 is installed at the input terminal, it can protect the entire inductor assembly 2 8, including all its subsequent sub-assemblies (such as the large three-phase inductor and 6 small single-phase inductors). In the event of an overcurrent or short circuit at the front end, the fuse 7 can immediately cut off the power supply to prevent overload damage to the entire inductor assembly 2 8 and downstream equipment. In addition, the front-side arrangement is usually easier to access and inspect, making replacement and maintenance faster.

[0028] The fuse 7 can also be installed after the inductor assembly 2 8 and connected in series at the output terminal of the inductor assembly 2 8 to ensure that the inductor assembly 2 8 works correctly and can completely cut off the current to the downstream circuit in abnormal conditions.

[0029] When there are two inductors inside the inductor assembly 28, and it is designed as a combination of 6 small single-phase inductors and 1 large three-phase inductor, the fuse 7 can be connected in series between the large and small inductors inside the inductor assembly 28. Setting the fuse 7 inside the inductor assembly 28 can specifically protect specific inductor parts (e.g., from small single-phase to large three-phase).

[0030] It should also be noted that the chopper resistor 2 is typically used in switching circuits to help adjust the amplitude of the signal or the magnitude of the current. The chopper module 4 is an integrated circuit or device that typically includes multiple functional components, such as resistors, switches, amplifiers, etc. It can quickly switch circuit states and is suitable for pulse width modulation and other modulation techniques.

[0031] The specific implementation scenario is as follows: by setting the power flow path from input to output in a straight line, and with the current entry and exit points relatively fixed, the number of cable crossings and excessively long connections is reduced, thereby improving electrical cleanliness and reducing the possibility of electromagnetic interference. Furthermore, since the components are arranged on a plane, it is easier to access each component during maintenance and repair, facilitating regular inspection, repair, or replacement of components. In addition, the linear layout makes it easier to implement modular design, with each unit or module arranged or replaced along the straight line, supporting rapid expansion or adjustment of the system.

[0032] Further, please refer to the appendix to the instruction manual. Figure 1 Inductor component 1 3 is located at the top of the cabinet 1, inductor component 2 8 is located at the bottom of the cabinet 1, bus capacitor 9 and power module 5 are both located in the middle of the cabinet 1, and their external AC connection terminal 10 is connected to inductor component 1 3 from the top of the cabinet 1, and the output terminal of inductor component 2 8 is connected to external AC connection terminal 2 11 from the bottom of the cabinet 1.

[0033] It should be noted that the power flow layout at this time is a top-in, bottom-out layout. The external AC power connection terminal 10 is connected to the inductor assembly 3 from the top of the cabinet 1, so that the current flows through the bus capacitor 9 and the power module 5 to the inductor assembly 8 located at the bottom inside the cabinet 1, and then flows out from the external AC power connection terminal 11.

[0034] It should also be noted that in the top-in, bottom-out layout, the heat exchange component 6 can also be placed above the bus capacitor 9 and below the inductor component 3. By placing the heat exchange component 6 between the inductor component 3 and the bus capacitor 9, it can be ensured that the heat of these two main heat-generating components is concentratedly discharged through the heat exchange component 6, thereby improving the overall system heat dissipation efficiency.

[0035] Further, please refer to the appendix to the instruction manual. Figure 3 Inductor component 1 3 is located at the lower part of the cabinet 1, and inductor component 2 8 is located at the upper part of the cabinet 1. Bus capacitor 9 and power module 5 are both located in the middle of the cabinet 1. Their external AC power connection terminal 10 is connected to inductor component 1 3 from the lower part of the cabinet 1, and the output terminal of inductor component 2 8 is connected to external AC power connection terminal 2 11 from the upper part of the cabinet 1.

[0036] It should be noted that the power flow layout at this time is a bottom-in, top-out layout. The external AC connection terminal 10 inputs the inductor component 3 from the bottom of the cabinet 1, so that the current flows through the bus capacitor 9 and the power module 5 to the inductor component 8 located inside the upper part of the cabinet 1, and then flows out from the external AC connection terminal 11.

[0037] It should also be noted that in the bottom-in, top-out layout, the heat exchange component 6 can also be placed below the bus capacitor 9 and above the inductor component 8. In this layout, the cold air will flow through the heat exchange component 6 first, thereby effectively reducing the temperature of the important parts of the capacitor and inductor. This is because the air entering from below is relatively cooler. Placing the heat exchange component 6 above the inductor component 8 can ensure that the heat initially absorbed and conducted by these inductors can be directly dissipated without affecting the lower bus capacitor 9 too much. This arrangement allows different components of the entire system to work in their own thermal environments, and the heat load is distributed more evenly, avoiding local overheating.

[0038] Further, please refer to the appendix to the instruction manual. Figure 2 and Figure 4 The cabinet 1 is also equipped with a circulating air duct 12, which runs through the cabinet 1. The circulating air duct 12 includes a back air chamber 1201 for the bus capacitor, which is located on the back of the bus capacitor 9.

[0039] It should be noted that by setting up a circulating air duct 12 inside the cabinet 1, the heat dissipation efficiency inside the cabinet 1 can be improved, and the overall heat dissipation cost can be reduced.

[0040] Further, please refer to the appendix to the instruction manual. Figure 2The air inlet of the circulating air duct 12 is located at the bottom of the cabinet 1. The airflow enters through the bottom of the cabinet 1, and then flows through the inductor assembly 2 8, the heat exchange assembly 6, the bus capacitor 9, and the back air cavity 1201 of the bus capacitor to the top of the cabinet 1. Then, it is split from the top of the cabinet 1, so that the two parts of the airflow flow back to the inductor assembly 2 8 from the gap between the power module 5 and the cabinet 1, and the gap between the back air cavity 1201 of the bus capacitor and the inner wall of the rear side of the cabinet 1, respectively, to form a circulating airflow.

[0041] It should be noted that, as Figure 2 As indicated by the arrow, in the top-in, bottom-out layout, the airflow of the circulating air duct 12 enters from the bottom of the cabinet 1. The airflow enters from the bottom of the cabinet 1, and then is split by the inductor assembly 2 8, the heat exchange assembly 6, the bus capacitor 9, and the back air cavity 1201 of the bus capacitor. Part of the airflow flows to the inductor assembly 3, and then flows down through the front of the power module 5 to the bottom front side of the inductor assembly 2 8. The other part of the airflow passes through the bottom of the inductor assembly 3 and then goes down and back, passing through the gap between the back air cavity 1201 of the bus capacitor and the rear inner wall of the cabinet 1, and returns to the bottom rear side of the inductor assembly 2 8, forming a circulating airflow to improve its heat dissipation efficiency.

[0042] Further, please refer to the appendix to the instruction manual. Figure 4 The air inlet of the circulating air duct 12 is located at the top of the cabinet 1. The airflow enters through the top of the cabinet 1, and then flows through the inductor assembly 2 8, the heat exchange assembly 6, the bus capacitor 9, and the back air cavity 1201 of the bus capacitor to the bottom of the cabinet 1. Then, it flows from the bottom of the cabinet 1, so that the two parts of the airflow flow back to the inductor assembly 2 8 from the gap between the power module 5 and the cabinet 1, and the gap between the back air cavity 1201 of the bus capacitor and the inner wall of the rear side of the cabinet 1, respectively, to form a circulating airflow.

[0043] It should be noted that, as Figure 4 As indicated by the arrow, in the bottom-in, top-out layout, the airflow of the circulating air duct 12 enters from the top of the cabinet 1, then flows through the inductor assembly 2 8, heat exchange assembly 6, bus capacitor 9, and the back air cavity 1201 of the bus capacitor to the inductor assembly 3 and then splits. Part of the airflow flows upward through the front of the power module 5 to the top front side of the inductor assembly 2 8, while the other part of the airflow passes through the top of the inductor assembly 1 3 and then moves backward and upward, passing through the gap between the back air cavity 1201 of the bus capacitor and the rear inner wall of the cabinet 1, and returns to the top rear side of the inductor assembly 2 8, forming a circulating airflow to improve its heat dissipation efficiency.

[0044] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A power converter cabinet, characterized by The utility model relates to a cabinet (1) is provided with inductive component one (3), power module (5), heat exchange component (6), inductive component two (8) and bus capacitor (9) in the cabinet (1), the power module (5) includes power module one (51), power module two (52) and power module three (53), and power module one (51), power module two (52) and power module three (53) are sequentially arranged from top to bottom in the cabinet (1), the cabinet (1) is provided with external AC connection end one (10) and external AC connection end two (11), external AC connection end one (10) connects inductive component one (3), and the output of bus capacitor (9), power module (5) and inductive component two (8) are connected with external AC connection end two (11), and external AC connection end one (10), inductive component one (3), bus capacitor (9), inductive component two (8) and external AC connection end two (11) are aligned in vertical direction, and bus capacitor (9) and power module (5) are aligned in horizontal direction. The utility model relates to a cabinet (1) is provided with inductive component one (3), power module (5), heat exchange component (6), inductive component two (8) and bus capacitor (9) in the cabinet (1), the power module (5) includes power module one (51), power module two (52) and power module three (53), and power module one (51), power module two (52) and power module three (53) are sequentially arranged from top to bottom in the cabinet (1), the cabinet (1) is provided with external AC connection end one (10) and external AC connection end two (11), external AC connection end one (10) connects inductive component one (3), and the output of bus capacitor (9), power module (5) and inductive component two (8) are connected with external AC connection end two (11), and external AC connection end one (10), inductive component one (3), bus capacitor (9), inductive component two (8) and external AC connection end two (11) are aligned in vertical direction, and bus capacitor (9) and power module (5) are aligned in horizontal direction. The utility model relates to a cabinet (1) is provided with inductive component one (3), power module (5), heat exchange component (6), inductive component two (8) and bus capacitor (9) in the cabinet (1), the power module (5) includes power module one (51), power module two (52) and power module three (53), and power module one (51), power module two (52) and power module three (53) are sequentially arranged from top to bottom in the cabinet (1), the cabinet (1) is provided with external AC connection end one (10) and external AC connection end two (11), external AC connection end one (10) connects inductive component one (3), and the output of bus capacitor (9), power module (5) and inductive component two (8) are connected with external AC connection end two (11), and external AC connection end one (10), inductive component one (3), bus capacitor (9), inductive component two (8) and external AC connection end two (11) are aligned in vertical direction, and bus capacitor (9) and power module (5) are aligned in horizontal direction. The utility model relates to a cabinet (1) is provided with inductive component one (3), power module (5), heat exchange component (6), inductive component two (8) and bus capacitor (9) in the cabinet (1), the power module (5) includes power module one (51), power module two (52) and power module three (53), and power module one (51), power module two (52) and power module three (53) are sequentially arranged from top to bottom in the cabinet (1), the cabinet (1) is provided with external AC connection end one (10) and external AC connection end two (11), external AC connection end one (10) connects inductive component one (3), and the output of bus capacitor (9), power module (5) and inductive component two (8) are connected with external AC connection end two (11), and external AC connection end one (10), inductive component one (3), bus capacitor (9), inductive component two (8) and external AC connection end two (11) are aligned in vertical direction, and bus capacitor (9) and power module (5) are aligned in horizontal direction.

2. A power converter cabinet according to claim 1, characterized in that: The utility model relates to a cabinet (1) is provided with inductive component one (3), power module (5), heat exchange component (6), inductive component two (8) and bus capacitor (9) in the cabinet (1), the power module (5) includes power module one (51), power module two (52) and power module three (53), and power module one (51), power module two (52) and power module three (53) are sequentially arranged from top to bottom in the cabinet (1), the cabinet (1) is provided with external AC connection end one (10) and external AC connection end two (11), external AC connection end one (10) connects inductive component one (3), and the output of bus capacitor (9), power module (5) and inductive component two (8) are connected with external AC connection end two (11), and external AC connection end one (10), inductive component one (3), bus capacitor (9), inductive component two (8) and external AC connection end two (11) are aligned in vertical direction, and bus capacitor (9) and power module (5) are aligned in horizontal direction.

3. A power converter cabinet according to claim 1, characterized in that: ​ 4. A power converter cabinet according to claim 1, characterized in that: ​ 5. A power converter cabinet according to claim 4, characterized in that: ​ 6. A power converter cabinet according to claim 4, characterized in that: The air inlet end of the circulating air duct (12) is arranged at the top of the cabinet body (1), the air flow enters through the top of the cabinet body (1), and then flows to the bottom of the cabinet body (1) through the inductor assembly two (8), the heat exchange assembly (6), the bus capacitor (9) and the bus capacitor back air cavity (1201), and then flows from the bottom of the cabinet body (1), so that the two air flows flow back to the inductor assembly two (8) through the gap between the power module (5) and the cabinet body (1) and the gap between the bus capacitor back air cavity (1201) and the inner wall at the back of the cabinet body (1), to form a circulating air flow.

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