Compact frequency converter

Abstract

The utility model discloses a compact frequency converter. The compact frequency converter comprises a housing; the water cooling system comprises a first water cooling plate, one side of the first water cooling plate is provided with a second water cooling plate, the second water cooling plate is connected with the first water cooling plate through an upper connecting plate and a lower connecting plate, the bottom of the shell is provided with a water inlet pipe and a water outlet pipe, and a mounting cavity is formed between the first water cooling plate and the second water cooling plate; the PCBA board is arranged on one side of the first water cooling board; the film capacitor is arranged on one side of the first water cooling plate and is electrically connected with the PCBA plate; the silicon carbide module is arranged on one side of the PCBA board and electrically connected with the PCBA board; the rectification module is arranged on one side of the first water cooling plate and is electrically connected with the PCBA plate; the alternating current reactor is arranged in the mounting cavity and is electrically connected with the PCBA board; and the direct-current reactor is arranged in the mounting cavity, is electrically connected with the PCBA board, and is electrically connected with the rectifier module through the direct-current contactor. The compact frequency converter is reasonable in structural layout, the size of the frequency converter is greatly reduced, the heat dissipation effect is good, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, and particularly relates to a compact frequency converter. Background Art

[0002] A variable-frequency drive (VFD) is a power control device that applies frequency conversion technology and microelectronics technology to control an AC motor by changing the working power frequency of the motor. The frequency converter mainly consists of a rectifier (AC to DC), a filter, an inverter (DC to AC), a braking unit, a drive unit, a detection unit, a microprocessing unit, etc. The frequency converter adjusts the voltage and frequency of the output power by the on-off of the internal IGBT, provides the required power voltage according to the actual needs of the motor, and thus achieves the purpose of energy saving and speed regulation. In addition, the frequency converter also has many protection functions, such as overcurrent, overvoltage, overload protection, etc. With the continuous improvement of industrial automation, the frequency converter has also been widely used. Due to the large number of components in the frequency converter, the existing frequency converter has a large volume, which limits its installation position, and the components generate a lot of heat, so the cooling effect of the frequency converter needs to be improved. Summary of the Utility Model

[0003] In view of the above defects or deficiencies in the prior art, it is desirable to provide a compact frequency converter with a reasonable structural layout, which greatly reduces the volume of the frequency converter, has a good heat dissipation effect, and extends the service life of the equipment.

[0004] A compact frequency converter provided by the utility model includes:

[0005] A housing;

[0006] A water cooling system, including a first water cooling plate fixedly arranged in the housing, a first water cooling channel is arranged in the first water cooling plate, a second water cooling plate is arranged on one side of the first water cooling plate, a second water cooling channel is arranged in the second water cooling plate, the top end of the second water cooling plate is fixedly connected with the first water cooling plate through an upper connecting plate, and the bottom end is fixedly connected with the first water cooling plate through a lower connecting plate. An inlet pipe communicated with the first water cooling channel and an outlet pipe communicated with the second water cooling channel are fixedly arranged at the bottom of the housing. The top end of the first water cooling channel is communicated with the top end of the second water cooling channel, and an installation cavity is formed between the first water cooling plate and the second water cooling plate;

[0007] A PCBA board, fixedly arranged on the side of the first water cooling plate away from the second water cooling plate;

[0008] A film capacitor, fixedly arranged on the side of the first water cooling plate away from the second water cooling plate, located below the PCBA board, and electrically connected with the PCBA board;

[0009] A silicon carbide module is fixedly arranged on one side of the PCBA board close to the first water-cooled plate and is electrically connected to the PCBA board;

[0010] A rectifier module is fixedly arranged on the side of the first water-cooled plate away from the PCBA board, at the top outside the installation cavity, and is electrically connected to the PCBA board;

[0011] An AC reactor is fixedly arranged in the installation cavity and is electrically connected to the PCBA board;

[0012] A DC reactor is fixedly arranged in the installation cavity, below the AC reactor, and is electrically connected to the PCBA board. The DC reactor is electrically connected to the rectifier module through a DC contactor, and the DC contactor is fixedly arranged on the first water-cooled plate, below the rectifier module.

[0013] Furthermore, two groups of hanging ears are fixedly arranged on the top of the housing.

[0014] Furthermore, a first copper bar electrically connected to the PCBA board and a second copper bar electrically connected to the AC reactor are arranged on one side of the housing.

[0015] Furthermore, the width of the first water-cooled plate is in clearance fit with the internal width of the housing, the height of the first water-cooled plate is in clearance fit with the internal height of the housing, and the top and both sides of the first water-cooled plate are fixedly connected to the housing through screws.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] In the frequency converter of the present utility model, the PCBA board, film capacitor, and silicon carbide module are arranged on one side of the first water-cooled plate, and the rectifier module, AC reactor, DC reactor, and DC contactor are arranged on the other side of the first water-cooled plate. The structural layout is reasonable. The PCBA board, film capacitor, and silicon carbide module are arranged side by side in the left and right plane with the rectifier module, AC reactor, DC reactor, and DC contactor, effectively reducing the space occupied by the frequency converter and greatly reducing the problem of limited installation position;

[0018] Each component is cooled by high-speed water cooling, and the AC reactor and DC reactor that generate relatively high heat are surrounded in the installation cavity between the first water-cooled plate and the second water-cooled plate. The overall heat dissipation effect of the frequency converter is excellent, effectively extending the service life of the equipment.

[0019] It should be understood that the content described in the utility model content section is not intended to limit the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. Description of the Drawings

[0020] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present utility model will become more apparent:

[0021] Figure 1 It is a schematic structural diagram of a compact frequency converter;

[0022] Figure 2 It is a schematic structural diagram of the installation of a PCBA board and a film capacitor;

[0023] Figure 3 It is a schematic structural diagram of the installation of a silicon carbide module;

[0024] Figure 4 It is a schematic structural diagram of the installation of a rectifier module, an AC reactor, a DC reactor, and a DC contactor.

[0025] Reference numerals in the drawings: 1, housing; 2, water cooling system; 3, PCBA board; 4, film capacitor; 5, silicon carbide module; 6, rectifier module; 7, AC reactor; 8, DC reactor; 9, DC contactor;

[0026] 11, hanging ear; 12, first copper bar; 13, second copper bar;

[0027] 21, first water cooling plate; 22, second water cooling plate; 23, upper connecting plate; 24, lower connecting plate; 25, water inlet pipe; 26, water outlet pipe; 27, installation cavity; 28, screw. Detailed Embodiments

[0028] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, rather than to limit the utility model. Additionally, it should be noted that for the sake of description, only the parts related to the utility model are shown in the drawings.

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and embodiments.

[0030] Please refer to Figures 1 to 4 , the embodiments of the present utility model provide a compact frequency converter, including:

[0031] Housing 1;

[0032] The water cooling system 2 includes a first water cooling plate 21 fixedly arranged in the housing 1. A first water cooling channel is arranged in the first water cooling plate 21. A second water cooling plate 22 is arranged on one side of the first water cooling plate 21. A second water cooling channel is arranged in the second water cooling plate 22. The top end of the second water cooling plate 22 is fixedly connected to the first water cooling plate 21 through an upper connecting plate 23, and the bottom end is fixedly connected to the first water cooling plate 21 through a lower connecting plate 24. A water inlet pipe 25 communicating with the first water cooling channel and a water outlet pipe 26 communicating with the second water cooling channel are fixedly arranged at the bottom of the housing 1. The top end of the first water cooling channel is communicated with the top end of the second water cooling channel. An installation cavity 27 is formed between the first water cooling plate 21 and the second water cooling plate 22;

[0033] The PCBA board 3 is fixedly arranged on the side of the first water cooling plate 21 away from the second water cooling plate 22;

[0034] The film capacitor 4 is fixedly arranged on the side of the first water cooling plate 21 away from the second water cooling plate 22, below the PCBA board 3, and is electrically connected to the PCBA board 3;

[0035] The silicon carbide module 5 is fixedly arranged on the side of the PCBA board 3 close to the first water cooling plate 21 and is electrically connected to the PCBA board 3;

[0036] The rectification module 6 is fixedly arranged on the side of the first water cooling plate 21 away from the PCBA board 3, at the top outside the installation cavity 27, and is electrically connected to the PCBA board 3;

[0037] The AC reactor 7 is fixedly arranged in the installation cavity 27 and is electrically connected to the PCBA board 3;

[0038] The DC reactor 8 is fixedly arranged in the installation cavity 27, below the AC reactor 7, and is electrically connected to the PCBA board 3. The DC reactor 8 is electrically connected to the rectification module 6 through a DC contactor 9. The DC contactor 9 is fixedly arranged on the first water cooling plate 21, below the rectification module 6.

[0039] In this embodiment, the PCBA board 3, the film capacitor 4, and the silicon carbide module 5 are arranged on one side of the first water cooling plate 21, and the rectification module 6, the AC reactor 7, the DC reactor 8, and the DC contactor 9 are arranged on the other side of the first water cooling plate 21. The structural layout is reasonable. The PCBA board 3, the film capacitor 4, and the silicon carbide module 5 are arranged side by side with the rectification module 6, the AC reactor 7, the DC reactor 8, and the DC contactor 9 in the left and right planes, effectively reducing the space occupied by the frequency converter and greatly reducing the problem of limited installation position of the frequency converter;

[0040] When the frequency converter is working, the cooling water enters the first water cooling channel of the first water cooling plate 21 through the water inlet pipe 25, cools and dissipates heat from the components on both sides of the first water cooling plate 21. The first water cooling plate 21 is made of aluminum alloy material, with high heat transfer efficiency and good cooling effect. After the cooling water flows through the first water cooling channel, it enters the second water cooling channel in the second water cooling plate 22 through the connection channel in the upper connection plate 23, and then is discharged through the water outlet pipe 26 at the bottom of the second water cooling channel. The second water cooling plate 22 forms a water cooling structure for secondary cooling of the AC reactor 7 and the DC reactor 8 that generate relatively high heat. The structural layout is reasonable, the overall heat dissipation effect is excellent, and the service life of the equipment is effectively extended.

[0041] In a preferred embodiment, as Figure 1 shown, two groups of hanging ears 11 are fixedly arranged on the top of the housing 1, which is convenient for the fixed installation of the frequency converter.

[0042] In a preferred embodiment, as Figure 1 、 3 、4 shown, a first copper bar 12 electrically connected to the PCBA board 3 and a second copper bar 13 electrically connected to the AC reactor 7 are arranged on one side of the housing 1, which is convenient for the electrical connection of the frequency converter with external devices.

[0043] In a preferred embodiment, the width of the first water cooling plate 21 is in clearance fit with the internal width of the housing 1, the height of the first water cooling plate 21 is in clearance fit with the internal height of the housing 1, and the top and both sides of the first water cooling plate 21 are fixedly connected to the housing 1 by screws 28 respectively. The structure is compact and the first water cooling plate 21 is firmly installed.

[0044] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A compact frequency converter, characterized in that: include: Housing (1); The water cooling system (2) comprises a first water cooling plate (21) fixedly arranged in the shell (1), a first water cooling channel being arranged in the first water cooling plate (21), a second water cooling plate (22) being arranged on one side of the first water cooling plate (21), a second water cooling channel being arranged in the second water cooling plate (22), the top end of the second water cooling plate (22) being fixedly connected to the first water cooling plate (21) via an upper connecting plate (23), and the bottom end of the second water cooling plate (22) being fixedly connected to the first water cooling plate via a lower connecting plate (24), a water inlet pipe (25) connected to the first water cooling channel and a water outlet pipe (26) connected to the second water cooling channel being fixedly arranged at the bottom of the shell (1), the top end of the first water cooling channel being connected to the top end of the second water cooling channel, and an installation cavity (27) being formed between the first water cooling plate (21) and the second water cooling plate (22); A PCBA board (3) is fixedly arranged on a side of the first water-cooling plate (21) away from the second water-cooling plate (22); A membrane capacitor (4) is fixedly arranged on a side of the first water-cooling plate (21) away from the second water-cooling plate (22), is located below the PCBA board (3), and is electrically connected to the PCBA board (3); A silicon carbide module (5) is fixedly arranged on a side of the PCBA board (3) close to the first water-cooling plate (21) and is electrically connected to the PCBA board (3); A rectifier module (6) is fixedly arranged on a side of the first water-cooling plate (21) away from the PCBA board (3), located at the top of the outer side of the installation cavity (27), and electrically connected to the PCBA board (3); An AC reactor (7) is fixedly disposed in the mounting cavity (27) and is electrically connected to the PCBA board (3); A DC reactor (8) is fixedly arranged in the installation cavity (27), located below the AC reactor (7), and electrically connected to the PCBA board (3); the DC reactor (8) is electrically connected to the rectifier module (6) via a DC contactor (9); the DC contactor (9) is fixedly arranged on the first water-cooling plate (21), and located below the rectifier module (6).

2. The compact frequency converter according to claim 1, characterized in that: Two groups of hanging ears (11) are fixedly arranged on the top of the shell (1).

3. The compact frequency converter according to claim 1, characterized in that: A first copper busbar (12) electrically connected to the PCBA board (3) and a second copper busbar (13) electrically connected to the AC reactor (7) are provided on one side of the housing (1).

4. The compact frequency converter according to claim 1, characterized in that: The width of the first water-cooling plate (21) is loosely matched with the internal width of the shell (1), the height of the first water-cooling plate (21) is loosely matched with the internal height of the shell (1), and the top and both sides of the first water-cooling plate (21) are fixedly connected to the shell (1) by screws (28) respectively.

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