Integrated frequency conversion control cabinet

Abstract

A rectifier bridge circuit installation area, a smoothing circuit installation area and an inverter circuit installation area are arranged in a cabinet body, each area is provided with a rectifier bridge circuit, a smoothing capacitor and a plurality of inverter circuits, the rectifier bridge circuit is connected with the smoothing capacitor, each inverter circuit comprises an inverter IGBT and an inverter controller, and the inverter circuit installation area is connected with the smoothing capacitor. Each inverter circuit is connected to the rectifier bridge circuit through a smoothing capacitor; and a water cooling system for cooling the inverter circuit and the rectifier bridge circuit is also arranged in the cabinet body. According to the scheme, an inversion part and an inversion control part are integrated, meanwhile, the inversion part, a rectification part and a capacitance flat wave part are integrated into an integral module, high integration is achieved, the system structure is simplified, meanwhile, a water-cooling heat dissipation system is adopted to replace a traditional air-cooling heat dissipation device, the temperature of components is effectively reduced through a large water-cooling aluminum plate, and therefore the heat dissipation efficiency is improved. And the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of control cabinets, and in particular relates to an integrated frequency conversion control cabinet. Background Art

[0002] As a key equipment in the field of industrial automation, the frequency conversion control cabinet is mainly used to perform frequency conversion speed control on the motor to achieve energy saving and precise control. The traditional frequency conversion control cabinet design usually integrates multiple air-cooled inverters in one cabinet to meet the control requirements of multiple motors. This design has achieved centralized control of multiple motors to a certain extent, but with the improvement of industrial automation, its limitations have gradually emerged, mainly reflected in:

[0003] Large in size: Figure 1 As shown, due to the need to accommodate multiple air-cooled inverters or the need to be divided into multiple control cabinets, a single control cabinet is large in size, which not only increases the demand for installation space, but also limits its application in space-constrained occasions.

[0004] Low heat dissipation efficiency: Multiple air-cooled inverters generate a lot of heat during operation, but traditional air-cooling methods are difficult to effectively dissipate this heat, resulting in an increase in the temperature inside the cabinet.

[0005] High maintenance cost: Poor heat dissipation not only affects the service life of electronic components, but also increases the difficulty and cost of maintenance, because components are more easily damaged in high temperature environments.

[0006] Poor system stability: High temperature environment will reduce the stability of the control system, increase the probability of failure, and affect the operating efficiency of the entire production line.

[0007] Limited scalability: As production demands increase, existing technologies are limited by physical space and heat dissipation capabilities when expanding to control more motors.

[0008] Through in-depth analysis of the prior art, the applicant realized the necessity of improving heat dissipation design and reducing the size of the control cabinet, which will help improve the performance and application scope of the frequency conversion control cabinet and meet the needs of modern industrial automation for efficient, compact and reliable control systems. Utility Model Content

[0009] The purpose of the utility model is to provide an integrated frequency conversion control cabinet in view of the above problems.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] An integrated frequency conversion control cabinet comprises a cabinet body, wherein the cabinet body has a rectifier bridge circuit installation area, a smoothing circuit installation area and an inverter circuit installation area, the rectifier bridge circuit installation area is installed with a rectifier bridge circuit, the smoothing circuit installation area is installed with a smoothing capacitor, the inverter circuit installation area is installed with a plurality of inverter circuits, and the rectifier bridge circuit is connected to the smoothing capacitor;

[0012] Each inverter circuit includes an inverter IGBT and an inverter control, and each inverter circuit is connected to the rectifier bridge circuit via a smoothing capacitor;

[0013] The cabinet also includes a water cooling system for dissipating heat from the inverter circuit and the rectifier bridge circuit.

[0014] In the above-mentioned integrated frequency conversion control cabinet, a mounting plate is provided in the cabinet, and the mounting area of ​​the rectifier bridge circuit, the mounting area of ​​the smoothing circuit and the mounting area of ​​the inverter circuit are all provided on the mounting plate.

[0015] In the above-mentioned integrated frequency conversion control cabinet, the installation plate extends in the vertical direction inside the cabinet, and the rectifier bridge circuit installation area, the smoothing circuit installation area and the inverter circuit installation area are arranged in sequence from bottom to top in the vertical direction.

[0016] In the above-mentioned integrated frequency conversion control cabinet, the various mounting areas on the mounting plate are staggered in the depth direction of the cabinet body;

[0017] The installation board is provided with two inverter circuit installation areas, and each inverter circuit installation area is used for installing a plurality of inverter circuits.

[0018] In the above-mentioned integrated frequency conversion control cabinet, the inverter circuit includes an inverter circuit board, the inverter IGBT and inverter control are integrated on the inverter circuit board, and the inverter circuit installation area includes a plurality of circuit board installation areas opened on the installation board for installing a plurality of inverter circuits.

[0019] In the above-mentioned integrated frequency conversion control cabinet, the rectifier bridge circuit installation area is also installed with an input terminal, and the input terminal is connected to the rectifier bridge circuit.

[0020] In the above-mentioned integrated frequency conversion control cabinet, a contactor is also installed in the rectifier bridge circuit installation area, and the contactor is connected in series between the rectifier bridge circuit and the smoothing capacitor.

[0021] In the above-mentioned integrated frequency conversion control cabinet, the water cooling system includes an inverter water-cooled aluminum plate and a rectifier water-cooled aluminum plate;

[0022] The inverter water-cooling aluminum plate is installed on the back side of the mounting plate corresponding to the inverter circuit mounting area, and the rectifier water-cooling aluminum plate is installed on the back side of the mounting plate corresponding to the rectifier bridge circuit.

[0023] In the above-mentioned integrated frequency conversion control cabinet, the back sides of the two inverter circuit installation areas are respectively provided with an inverter water-cooling aluminum plate arranged along the arrangement direction of the circuit board installation areas.

[0024] In the above-mentioned integrated frequency conversion control cabinet, a circulating water tank is designed on the side of the cabinet, and the circulating water tank is connected to the inverter water-cooled aluminum plate and the rectifier water-cooled aluminum plate.

[0025] Compared with the existing technology, the advantages of the utility model are:

[0026] 1. Integrate the inverter part and the inverter control part into a single circuit board, and integrate the single circuit board with the rectifier part and the capacitor smoothing part into an integral module on the mounting board, thus achieving high integration and simplifying the system structure;

[0027] 2. Design multiple circuit board installation areas on the installation board, implement multiple inverter circuits in the same control cabinet, use common rectification and filtering, and realize separate control of multiple motors through one control cabinet. Each additional motor only needs to increase the inverter terminal, and there is no need to equip each motor with a frequency converter. The space occupies a small space and the circuit is simple.

[0028] 3. Use water cooling system to replace the traditional air cooling radiator, and use large water cooling aluminum plates to effectively reduce the temperature of components and improve heat dissipation efficiency;

[0029] 4. The improvement from the original separate air cooling to integrated water cooling not only has a good heat dissipation effect, but also greatly reduces the volume of the control cabinet, saves space, and facilitates installation and layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the circuit connection schematic diagram of a traditional frequency conversion control cabinet with one motor and one frequency converter;

[0031] Figure 2 The circuit connection schematic diagram of the frequency conversion control cabinet of this scheme;

[0032] Figure 3 This is the structural diagram of the frequency conversion control cabinet of this scheme;

[0033] Figure 4 This is the structural diagram of the installation plate in the frequency conversion control cabinet of this scheme;

[0034] Figure 5 This is the second angle structural diagram of the frequency conversion control cabinet of this scheme;

[0035] Figure 6This is the second angle structural diagram of the mounting plate in the frequency conversion control cabinet of this solution;

[0036] Figure 7 This is the rear side view of the variable frequency control cabinet of this solution;

[0037] Figure 8 This is the third angle structural diagram of the mounting plate in the frequency conversion control cabinet of this scheme.

[0038] In the figure: cabinet 1; mounting plate 2; rectifier bridge circuit mounting area 21; smoothing circuit mounting area 22; inverter circuit mounting area 23; rectifier bridge circuit 31; smoothing capacitor 32; inverter circuit 33; inverter IGBT 331; inverter control 332; inverter circuit board 333; contactor 34; input terminal 35; inverter water-cooled aluminum plate 41; rectifier water-cooled aluminum plate 42; circulating water tank 43. DETAILED DESCRIPTION

[0039] The utility model is further described below in conjunction with the accompanying drawings.

[0040] This embodiment provides an integrated frequency conversion control cabinet, which integrates the rectifier part and capacitor smoothing part of the inverter into an integral module, integrates each inverter part and inverter control part into a circuit board, and then directly installs the rectifier components, smoothing capacitors, inverter IGBTs and inverter controls in the cabinet. In this way, not only the size of the cabinet is greatly reduced, but also the cable wiring in the cabinet is greatly reduced. In addition, the improvement from multiple finned aluminum heat sinks for air cooling to the use of a large piece of water-cooled aluminum plate greatly reduces the temperature of all components in the cabinet, which can effectively increase the service life of the entire equipment. Figure 2 As shown, this solution realizes common rectification and filtering through the aforementioned improvements, and can realize separate control of multiple motors through one control cabinet. Each additional motor only needs to increase the inverter terminal, and there is no need to equip each motor with a frequency converter. The space occupies a small space and the circuit is simple.

[0041] Specifically, Figure 3 and Figure 4 As shown, the control cabinet includes a cabinet body 1, a mounting plate 2 is provided inside the cabinet body 1, and the mounting plate 2 has a rectifier bridge circuit mounting area 21, a smoothing circuit mounting area 22 and an inverter circuit mounting area 23.

[0042] The rectifier bridge circuit installation area 21 is installed with a rectifier bridge circuit 31, an input terminal 35, and a contactor 34, the smoothing circuit installation area 22 is installed with a smoothing capacitor 32, and the inverter circuit installation area 23 is installed with a plurality of inverter circuits 33, and the rectifier bridge circuit 31 is connected to the smoothing capacitor 32. Each inverter circuit 33 includes an inverter IGBT 331, an inverter control 332, and an inverter circuit board 333, and the inverter IGBT 331 and the inverter control 332 are integrated on the inverter circuit board 333. The inverter circuit installation area 23 includes a plurality of circuit board installation areas 231 opened on the installation board 2 for installing a plurality of inverter circuits 33.

[0043] Furthermore, if Figure 5 and Figure 6 As shown, the mounting plate 2 extends in the vertical direction in the cabinet 1, and the rectifier bridge circuit mounting area 21, the smoothing circuit mounting area 22 and the inverter circuit mounting area 23 are arranged in sequence from bottom to top in the vertical direction. At the same time, there are two inverter circuit mounting areas 23 on the mounting plate 2, each of which is used to install a number of inverter circuits 33. Specifically, in this embodiment, each inverter circuit mounting area 23 can be used to install 8 inverter circuits 33. Preferably, the various mounting areas on the mounting plate 2 are staggered in the depth direction of the cabinet 1. The staggered design can more effectively utilize the internal space of the cabinet, so that each part can be reasonably laid out in a limited space.

[0044] At the same time Figure 7 and Figure 8 As shown, the cabinet 1 of this scheme also includes a water cooling system for dissipating heat for the inverter circuit 33 and the rectifier bridge circuit 31, and the water cooling system includes an inverter water-cooled aluminum plate 41 and a rectifier water-cooled aluminum plate 42. The inverter water-cooled aluminum plate 41 is installed on the back side of the mounting plate 2 corresponding to the inverter circuit mounting area 23, and the rectifier water-cooled aluminum plate 42 is installed on the back side of the mounting plate 2 corresponding to the rectifier bridge circuit 31. The back sides of the two inverter circuit mounting areas 23 respectively have an inverter water-cooled aluminum plate 41 arranged along the arrangement direction of the circuit board mounting area 231 so that the inverter water-cooled aluminum plate 41 covers all the circuit board mounting areas 231 of the corresponding inverter circuit mounting area 23, thereby cooling and dissipating all the circuit boards. The staggered design of the mounting plate can make the water-cooled aluminum plates present a staggered distribution in space, so that the heat distribution in the cabinet is more uniform and the heat dissipation efficiency is improved.

[0045] Furthermore, a circulating water tank 43 is designed on the side of the cabinet 1 , and the circulating water tank 43 is connected to the inverter water-cooled aluminum plate 41 and the rectifier water-cooled aluminum plate 42 .

[0046] like Figure 3As shown, in this embodiment, the three-phase power supply is input through the input terminal 35, rectified by 9 200A rectifier bridge circuits 31, and reaches the DC smoothing capacitor 32 through two 400A DC contactors 34. After passing through the DC smoothing capacitor 32, it is distributed to 16 inverter circuit boards 333. Each inverter circuit board 333 integrates the inverter IGBT 331 and the inverter control 332. Each inverter circuit board 333 can be controlled separately. Through the integrated design, the volume of the cabinet is greatly reduced, saving the space occupied on site. In addition, the rectifier bridge is installed on the rectifier water-cooled aluminum plate, and the inverter IGBT module on the inverter circuit board is installed on the inverter water-cooled aluminum plate. Through circulating water cooling and heat dissipation, the temperature of all components in the cabinet is greatly reduced, and the product stability and service life are improved.

[0047] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0048] Although this article uses more terms such as cabinet 1; rectifier bridge circuit installation area 21; smoothing circuit installation area 22; inverter circuit installation area 23; rectifier bridge circuit 31; smoothing capacitor 32; inverter circuit 33; inverter IGBT 331; inverter control 332; contactor 34; input terminal 35; inverter water-cooled aluminum plate 41; and rectifier water-cooled aluminum plate 42; circulating water tank 43, it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of the utility model. It is contrary to the spirit of the utility model to interpret them as any additional restrictions.

Claims

1. An integrated frequency conversion control cabinet, comprising a cabinet body (1), characterized in that: The cabinet (1) has a rectifier bridge circuit installation area (21), a smoothing circuit installation area (22) and an inverter circuit installation area (23); the rectifier bridge circuit installation area (21) is installed with a rectifier bridge circuit (31); the smoothing circuit installation area (22) is installed with a smoothing capacitor (32); the inverter circuit installation area (23) is installed with a plurality of inverter circuits (33); and the rectifier bridge circuit (31) is connected to the smoothing capacitor (32); Each inverter circuit (33) comprises an inverter IGBT (331) and an inverter control (332), and each inverter circuit (33) is connected to the rectifier bridge circuit (31) via a smoothing capacitor (32); The cabinet (1) also includes a water cooling system for dissipating heat from the inverter circuit (33) and the rectifier bridge circuit (31).

2. The integrated frequency conversion control cabinet according to claim 1, characterized in that: The cabinet (1) has a mounting plate (2) in it, and the rectifier bridge circuit mounting area (21), the smoothing circuit mounting area (22) and the inverter circuit mounting area (23) are all arranged on the mounting plate (2).

3. The integrated frequency conversion control cabinet according to claim 2, characterized in that: The installation plate (2) extends in the vertical direction inside the cabinet (1), and the rectifier bridge circuit installation area (21), the smoothing circuit installation area (22) and the inverter circuit installation area (23) are arranged in sequence from bottom to top in the vertical direction.

4. The integrated frequency conversion control cabinet according to claim 3, characterized in that: The various installation areas on the installation plate (2) are designed to be staggered along the depth direction of the cabinet (1); The installation plate (2) is provided with two inverter circuit installation areas (23), and each inverter circuit installation area (23) is used to install a plurality of inverter circuits (33).

5. The integrated frequency conversion control cabinet according to any one of claims 2 to 4, characterized in that: The inverter circuit (33) comprises an inverter circuit board (333), the inverter IGBT (331) and the inverter control (332) are integrated on the inverter circuit board (333), and the inverter circuit installation area (23) comprises a plurality of circuit board installation areas (231) opened on the installation board (2) for installing a plurality of inverter circuits (33).

6. The integrated frequency conversion control cabinet according to claim 5, characterized in that: The rectifier bridge circuit installation area (21) is also installed with an input terminal (35), and the input terminal (35) is connected to the rectifier bridge circuit (31).

7. The integrated frequency conversion control cabinet according to claim 6, characterized in that: The rectifier bridge circuit installation area (21) is also installed with a contactor (34), and the contactor (34) is connected in series between the rectifier bridge circuit (31) and the smoothing capacitor (32).

8. The integrated frequency conversion control cabinet according to any one of claims 2 to 4, characterized in that: The water cooling system comprises an inverter water cooling aluminum plate (41) and a rectifier water cooling aluminum plate (42); The inverter water-cooling aluminum plate (41) is installed on the back side of the mounting plate (2) corresponding to the inverter circuit mounting area (23), and the rectifier water-cooling aluminum plate (42) is installed on the back side of the mounting plate (2) corresponding to the rectifier bridge circuit (31).

9. The integrated frequency conversion control cabinet according to claim 8, characterized in that: The back sides of the two inverter circuit installation areas (23) are respectively provided with an inverter water-cooling aluminum plate (41) arranged along the arrangement direction of the circuit board installation area (231).

10. The integrated frequency conversion control cabinet according to claim 9, characterized in that: A circulating water tank (43) is designed on the side of the cabinet (1), and the circulating water tank (43) is connected to the inverter water-cooled aluminum plate (41) and the rectifier water-cooled aluminum plate (42).

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