Direct-current bus capacitor module and electrical equipment

Abstract

The utility model discloses a direct current bus capacitor module and electrical equipment, comprising a capacitor module body, and also comprising a hardware board installation metal plate, the hardware board installation metal plate comprises a hardware board installation plate main body and a fixed ear plate arranged on the hardware board installation plate main body, the fixing lug plate is used for being attached to one side, facing a door body of a cabinet body, of the capacitor module body and is connected with the capacitor module body through a fastener, and the hardware board mounting plate body is used for mounting a first hardware board. According to the utility model, on one hand, the problem of small assembly space faced by the miniaturization design of electrical equipment can be solved, and on the other hand, the operability of after-sales maintenance is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, and in particular to a DC bus capacitor module and electrical equipment. Background Art

[0002] With higher requirements for central air-conditioning in terms of green environmental protection, traditional high-power water-cooled central air-conditioning such as fixed-frequency screw air-conditioning is gradually being replaced by oil-free and friction-free magnetic and air-suspended centrifugal large-scale water-cooled central air-conditioning, among which high-power frequency conversion cabinets play a particularly critical role.

[0003] One of the development directions of high-power frequency converter cabinets is miniaturization and integrated design, which can not only improve the power density of the frequency converter cabinet, but also reduce the cost due to its smaller size. However, the important problem faced by the miniaturization and integration of the frequency converter cabinet is that the internal space of the frequency converter is small, which increases the difficulty of assembly and maintenance.

[0004] For the frequency converter cabinet, the DC bus capacitor has a certain life cycle and is a wearing part that needs to be replaced regularly. However, the replacement of the DC bus capacitor is very troublesome. It is necessary to remove the copper bus connected to the DC bus capacitor and then remove the capacitors one by one. The most difficult operation is to perform a series of disassembly operations in the frequency converter cabinet, which is extremely difficult to replace for a small frequency converter cabinet.

[0005] In the prior art, the DC bus capacitor and the capacitor copper bar are integrated together to form a module, which is uniformly installed in the cabinet so that the DC bus capacitors can be replaced outside the cabinet after being disassembled as a whole, thereby solving the problem of difficulty in disassembling and assembling them one by one in the cabinet in the prior art.

[0006] In order to improve space utilization, hardware boards and other small components are placed on the outer surface of the capacitor module. Because the components of the capacitor module are assembled outside the cabinet and then installed inside the cabinet, and there is another module directly below the capacitor module, if the components or hardware boards installed on the lower surface of the capacitor module need to be replaced during after-sales maintenance, the entire capacitor module can only be removed and replaced separately. However, removing the entire capacitor module to remove the components on the surface of the capacitor module requires a lot of work and is inconvenient for after-sales maintenance.

[0007] Therefore, how to conveniently remove other components outside the module is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0008] In view of this, the purpose of the present utility model is to provide a DC bus capacitor module to facilitate the removal of other components outside the module;

[0009] Another object of the present invention is to provide an electrical device having the above-mentioned DC bus capacitor module.

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

[0011] A DC bus capacitor module includes a capacitor module body and a hardware board mounting sheet metal. The hardware board mounting sheet metal includes a hardware board mounting plate body and a fixing ear plate arranged on the hardware board mounting plate body. The fixing ear plate is used to fit on the side of the capacitor module body facing the door body of a cabinet and is connected to the capacitor module body via fasteners. The hardware board mounting plate body is used to install a first hardware board.

[0012] Optionally, in the above DC bus capacitor module, the capacitor module body includes:

[0013] A first mounting sheet metal and a mounting back plate, wherein the first mounting sheet metal is mounted on the mounting back plate and forms a capacitor assembly mounting space with the mounting back plate, the mounting back plate has a mounting portion for mounting, the hardware board mounting sheet metal is arranged on the lower side of the first mounting sheet metal, and the fixing ear plate is fixed on the first mounting sheet metal;

[0014] The second installation sheet metal is arranged in the capacitor assembly installation space and divides the capacitor assembly installation space into a copper busbar installation space and a capacitor installation space;

[0015] The DC bus capacitor assembly comprises a DC bus capacitor and a capacitor copper bus electrically connected to the DC bus capacitor. The DC bus capacitor is arranged in the capacitor installation space, and the capacitor copper bus is arranged in the copper bus installation space.

[0016] Optionally, in the above-mentioned DC bus capacitor module, the copper busbar installation space is formed between the second installation sheet metal and the installation back plate, and the capacitor installation space is formed between the first installation sheet metal and the second installation sheet metal;

[0017] The DC bus capacitor is fixed on the second mounting sheet metal.

[0018] Optionally, in the above-mentioned DC bus capacitor module, the DC bus capacitor is fixed to the second mounting sheet metal via a capacitor clamp.

[0019] Optionally, in the above-mentioned DC bus capacitor module, the first mounting sheet metal includes a first back sheet metal and an upper sheet metal and a lower sheet metal arranged at both ends of the first back sheet metal and extending in the same direction, and one of the upper sheet metal and the lower sheet metal is provided with a first mounting folding edge, the first mounting folding edge is used to be fixed to the mounting back plate by a fastener, and the first mounting folding edge extends to the outside of the capacitor assembly mounting space;

[0020] The hardware board mounting plate body is attached to the lower sheet metal, and the fixing ear plate is fixed on the first back sheet metal.

[0021] Optionally, in the above-mentioned DC bus capacitor module, a mounting flange is provided on a side of the hardware board mounting plate body close to the capacitor copper bar, and the mounting flange has a flange mounting hole;

[0022] The side edge of the hardware board mounting plate body is provided with a reinforcing flange, and the side edge on which the reinforcing flange is provided is perpendicular to the side edge on which the mounting flange is provided.

[0023] Optionally, in the above DC bus capacitor module, the upper sheet metal and the lower sheet metal are arranged in parallel and are both perpendicular to the first back sheet metal;

[0024] The upper sheet metal is located above the lower sheet metal, and a gap is provided between the lower sheet metal and the mounting back plate for the capacitor copper bar to extend out of the capacitor assembly mounting space.

[0025] Optionally, in the above-mentioned DC bus capacitor module, the upper sheet metal, the lower sheet metal and the first back sheet metal all have reinforced folded edges extending in the direction of the capacitor assembly installation space, and the reinforced folded edges on the upper sheet metal and the lower sheet metal form a limit for the second installation sheet metal.

[0026] Optionally, in the above-mentioned DC bus capacitor module, the second mounting sheet metal includes a second back sheet metal and side ventilation sheet metals arranged at both ends of the second back sheet metal and extending in the same direction, the side ventilation sheet metals are provided with a plurality of ventilation holes, the capacitor mounting space is located between the second back sheet metal and the first back sheet metal, and the copper bar mounting space is located between the second back sheet metal and the mounting back plate;

[0027] The side ventilation sheet metal is provided with a second mounting fold, and the second mounting fold is used to be fixed to the mounting back plate by fasteners.

[0028] Optionally, in the above-mentioned DC bus capacitor module, the second back sheet metal is parallel to the first back sheet metal, and the side ventilation sheet metal is perpendicular to the first back sheet metal, the upper sheet metal and the lower sheet metal.

[0029] Optionally, in the above-mentioned DC bus capacitor module, third mounting flanges are provided on both upper and lower sides of the second back sheet metal, and the third mounting flanges are connected to the upper sheet metal and the lower sheet metal on the corresponding sides through fasteners.

[0030] The DC bus capacitor module provided by the utility model adds a hardware board installation sheet metal on the basis of the capacitor module body, and fixes the first hardware board fixed to the outside of the capacitor module body on the hardware board installation sheet metal. In order to allow the hardware board installation sheet metal to be separately disassembled without disassembling the capacitor module body, the hardware board installation sheet metal has a fixed ear plate that can be attached to the side of the capacitor module body facing the cabinet door. The fixed ear plate is fixed to the capacitor module body by fasteners. When the first hardware plate needs to be disassembled, after opening the cabinet door, the fixed ear plate can be positioned on the side facing the door body, and the fasteners can be directly removed by tools, thereby realizing the disassembly of the hardware board installation sheet metal and the first hardware board thereon.

[0031] An electrical device comprises a DC bus capacitor module as described in any one of the above items, wherein the electrical device is a frequency conversion cabinet or an electric control cabinet.

[0032] The electrical equipment provided by the utility model has the above-mentioned DC bus capacitor module, and therefore has all the technical effects of the above-mentioned DC bus capacitor module, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of an electrical device provided in an embodiment of the utility model;

[0035] Figure 2 A schematic diagram of the structure of a DC bus capacitor module provided by an embodiment of the utility model;

[0036] Figure 3 A schematic diagram of the structure of the hardware board installation sheet metal provided by the embodiment of the utility model;

[0037] Figure 4 A front view of a hardware board installation sheet metal provided by an embodiment of the utility model;

[0038] Figure 5 A schematic diagram of the structure of a capacitor module body provided by an embodiment of the utility model;

[0039] Figure 6 A schematic diagram of the structure of a first mounting sheet metal provided in an embodiment of the utility model;

[0040] Figure 7A schematic structural diagram of a second mounting sheet metal provided in an embodiment of the utility model.

[0041] The meanings of the reference numerals in the figures are as follows:

[0042] 100-DC bus capacitor module;

[0043] 110-first installation sheet metal; 111-upper sheet metal; 112-first back sheet metal; 113-lower sheet metal; 114-reinforced hem; 115-first installation hem;

[0044] 120- Install the back panel;

[0045] 130-DC bus capacitor;

[0046] 140-capacitor clamp;

[0047] 150-capacitor copper busbar;

[0048] 160-second mounting sheet metal; 161-side ventilation sheet metal; 1611-ventilation hole; 162-second back sheet metal; 1621-capacitor mounting hole; 163-second mounting folding edge; 1631-fastening hole; 164-third mounting folding edge;

[0049] 170-Hardware plate installation sheet metal; 171-Hardware plate installation plate body; 172-Reinforced flange; 173-Fixed ear plate; 1731-Fixed hole; 174-Installation flange; 1741-Flanged mounting hole;

[0050] 200-power module;

[0051] 310 - first hardware board; 320 - second hardware board; 330 - third hardware board. DETAILED DESCRIPTION

[0052] The core of the utility model is to provide a DC bus capacitor module to facilitate the removal of other components outside the module;

[0053] Another core of the utility model is to provide an electrical device having the above-mentioned DC bus capacitor module.

[0054] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0055] It should be noted that the embodiments of the present invention provide Figure 1-Figure 7In the diagram, there are direction indications, such as up and down, front and back, left and right; the direction indication refers to the direction after the DC bus capacitor module 100 is installed inside the cabinet, the door side of the cabinet is the front, the side opposite to the door side is the back, facing the door side, the side on the left hand side is the left, the side on the right side is the right, the upper side of the cabinet is the top, and the lower side is the bottom.

[0056] like Figure 1-Figure 4 As shown, the DC bus capacitor module 100 disclosed in the embodiment of the utility model includes a capacitor module body and a hardware board mounting sheet metal 170, the hardware board mounting sheet metal 170 includes a hardware board mounting plate body 171 and a fixed ear plate 173 arranged on the hardware board mounting plate body 171, and the hardware board mounting plate body 171 is used to install the first hardware board 310. The fixed ear plate 173 can be formed by cutting and bending on the hardware board mounting plate body 171, that is, firstly cutting out the outline of the fixed ear plate 173 on the hardware board mounting plate body 171, it should be noted that the fixed ear plate 173 needs to keep one side uncut so that it can be connected with the hardware board mounting plate body 171, and then the fixed ear plate 173 is bent along the connection position, so that the fixed ear plate 173 can be formed on the hardware board mounting plate body 171.

[0057] The fixing ear plate 173 is used to fit on the side of the capacitor module body facing the door of the cabinet, and is connected to the capacitor module body through a fastener, that is, the fixing ear plate 173 has a fixing hole 1731, which is used to penetrate the fastener to achieve connection with the capacitor module body. The fixing ear plate 173 fits on the plate body at the front side of the capacitor module body.

[0058] The DC bus capacitor module 100 provided by the utility model adds a hardware board mounting sheet metal 170 on the basis of the capacitor module body, and fixes the first hardware board 310 fixed to the outside of the capacitor module body on the hardware board mounting sheet metal 170. In order to allow the hardware board mounting sheet metal 170 to be removed separately without disassembling the capacitor module body, the hardware board mounting sheet metal 170 has a fixed ear plate 173 that can be attached to the side of the capacitor module body facing the cabinet door. The fixed ear plate 173 is fixed to the capacitor module body by fasteners. When it is necessary to disassemble the first hardware board 310, after opening the cabinet door, the position of the fixed ear plate 173 faces the side of the door body, and the fasteners can be directly removed by tools, thereby realizing the disassembly of the hardware board mounting sheet metal 170 and the first hardware board 310 thereon.

[0059] like Figure 5As shown, in this embodiment, the capacitor module body includes a first mounting sheet metal 110, a mounting back plate 120, a second mounting sheet metal 160 and a DC bus capacitor assembly. Among them, the first mounting sheet metal 110 is mounted on the mounting back plate 120. Specifically, the first mounting sheet metal 110 and the mounting back plate 120 can be fixed by fasteners so that the two can be disassembled and assembled according to needs. When replacing the DC bus capacitor assembly, the first mounting sheet metal 110 and the mounting back plate 120 can be disassembled, and then the DC bus capacitor assembly can be disassembled and replaced.

[0060] After the first mounting sheet metal 110 and the mounting back plate 120 are installed, a capacitor assembly installation space is enclosed between the two. The mounting back plate 120 has a mounting portion for installation. The mounting portion on the mounting back plate 120 can be a fastening hole, so that the DC bus capacitor module can be installed in the cabinet of the electrical equipment through the mounting plate. The hardware board mounting sheet metal 170 is arranged on the lower side of the first mounting sheet metal 110, and the fixing ear plate 173 is fixed on the first mounting sheet metal 110. The upwardly tilted fixing ear plate 173 can be attached to the plate body at the frontmost side of the first mounting sheet metal 110 for fixing, so that although the hardware board mounting sheet metal 170 is arranged on the lower side of the first mounting sheet metal 110, since the fastening point is located at the frontmost side of the first mounting sheet metal 110, the hardware board mounting sheet metal 170 can also be easily disassembled.

[0061] The DC bus capacitor assembly includes a DC bus capacitor 130 and a capacitor copper bar 150 electrically connected to the DC bus capacitor. In this embodiment, the DC bus capacitor assembly can be installed in the capacitor assembly installation space. Figure 1 and Figure 2 As shown, the mounting back plate 120 can be installed at the rear of the cabinet, that is, the DC bus capacitor module 100 is installed in the upper right rear area of ​​the cabinet.

[0062] like Figure 5 and Figure 6 As shown, the capacitor assembly installation space formed after the first installation sheet metal 110 and the installation back plate 120 are installed has an opening in at least one direction to ensure that the DC bus capacitor assembly can be cooled, so as to achieve ventilation and heat dissipation of the DC bus capacitor assembly in the capacitor assembly installation space. After the DC bus capacitor module 100 is installed in the cabinet, the capacitor assembly installation space can retain an opening in the left and right directions, or in the up and down directions.

[0063] Considering the rationality of the layout, a cooling fan is provided on the right side wall of the cabinet at the upper right corner of the cabinet, that is, on the right side of the DC bus capacitor module 100, so the scheme adopts the left and right opening method to facilitate the heat dissipation of the DC bus capacitor assembly. Considering integration and modularization, the surface of the first mounting sheet metal 110 can be installed with small devices such as hardware boards and voltage grading resistors.

[0064] The second mounting sheet metal 160 is arranged in the capacitor assembly mounting space, and the capacitor assembly mounting space is divided into a copper bar mounting space and a capacitor mounting space. The DC bus capacitor 130 is arranged in the capacitor mounting space, and the capacitor copper bar 150 is arranged in the copper bar mounting space. The DC bus capacitor 130 can be fixed on the second mounting sheet metal 160, or it can be fixed on the first mounting sheet metal 110. Specifically, the internal DC bus capacitor 130 and the capacitor copper bar 150 can be installed in a forward or reverse manner, and the forward installation means that the tail of the DC bus capacitor 130 faces forward, and the reverse installation means that the capacitor copper bar 150 faces forward. Since the capacitor copper bar 150 is connected to the IGBT module, and the IGBT module needs to be attached to the heat sink on the rear side of the cabinet, considering the IGBT heat dissipation effect and layout rationality, the installation method of the current solution, i.e., the forward installation method, is adopted.

[0065] The DC bus capacitor module 100 provided by the utility model installs the first mounting sheet metal 110 and the mounting back plate 120 together, and encloses the capacitor assembly installation space between the two. The second mounting sheet metal 160 is arranged in the capacitor assembly installation space, and the capacitor assembly installation space is divided into a copper bar installation space and a capacitor installation space, the DC bus capacitor 130 is installed in the capacitor installation space, and the capacitor copper bar 150 is installed in the copper bar installation space. The DC bus capacitor module 100 is installed in the cabinet through the mounting portion on the mounting back plate 120. The utility model adopts a modular design, and the DC bus capacitor 130 is combined with the connected capacitor copper bar 150 and other related devices through the first mounting sheet metal 110 and the second mounting sheet metal 160 to form a module. The DC bus capacitor module 100 can be disassembled as a whole during assembly or after-sales maintenance, and the DC bus capacitor 130 can be replaced outside the cabinet. On the one hand, it can solve the problem of small assembly space faced by the miniaturized design of electrical equipment, and on the other hand, it greatly improves the operability of after-sales maintenance.

[0066] If a DC bus capacitor 130 with bolts at the rear is used, the DC bus capacitor 130 can be directly fixed to the first mounting sheet metal 110, and both sides (i.e. both sides in the left and right directions) of the first mounting sheet metal 110 are opened. Such a setting can achieve the fixation and heat dissipation and ventilation of the DC bus capacitor 130, but in this solution, because the first mounting sheet metal 110 needs to fix and support the DC bus capacitor 130, the thickness requirement of the first mounting sheet metal 110 is relatively high, the cost is also high, and the supporting effect is not ideal.

[0067] like Figure 5As shown, in a specific embodiment of the utility model, a copper busbar installation space is formed between the second mounting sheet metal 160 and the mounting back plate 120, and a capacitor installation space is formed between the first mounting sheet metal 110 and the second mounting sheet metal 160. The DC bus capacitor 130 is fixed on the second mounting sheet metal 160. In this embodiment, a second mounting sheet metal 160 is added in the capacitor assembly installation space, and the DC bus capacitor 130 is fixed to the second mounting sheet metal 160, so that the fixing point of the DC bus capacitor 130 is located in the middle area of ​​the capacitor assembly installation space, which makes it easier to ensure balanced force. In addition, the DC bus capacitor 130 can be fixed to the second mounting sheet metal 160 by a capacitor clamp 140, further improving the reliability of the fixation of the DC bus capacitor 130.

[0068] like Figure 6 As shown, in this embodiment, the first installation sheet metal 110 includes a first back sheet metal 112 and an upper sheet metal 111 (located on the upper side) and a lower sheet metal 113 (located on the lower side) disposed at both ends of the first back sheet metal 112 and extending in the same direction. That is, in this embodiment, the first installation sheet metal 110 is a U-shaped structure. The first installation sheet metal 110 can be formed into an upper sheet metal 111, a lower sheet metal 113 and a first back sheet metal 112 by a bending process.

[0069] One of the upper sheet metal 111 and the lower sheet metal 113 is provided with a first mounting flange 115, and the first mounting flange 115 is used to be fixed to the mounting back plate 120 by fasteners. It should be noted that the first mounting flange 115 should extend to the outside of the capacitor assembly installation space to facilitate disassembly and assembly, that is, when the fasteners on the first mounting flange 115 are disassembled and assembled, they are not affected or interfered by the components in the capacitor assembly installation space.

[0070] The hardware board mounting plate body 171 is attached to the lower sheet metal 113, and the fixing ear plate 173 is fixed to the first back sheet metal 112. The hardware board mounting plate body 171 is parallel to the lower sheet metal 113, and the hardware board mounting sheet metal 170 and the hardware board can be installed and removed by locking the fasteners on the front side, which is more convenient for installation and removal.

[0071] like Figure 3 and Figure 4 As shown, a mounting flange 174 (located at the rear side of the hardware board mounting sheet metal 170) is provided on one side of the hardware board mounting plate body 171 close to the capacitor copper bar 150, and the mounting flange 174 has a flange mounting hole 1741, which is fixed to a certain object by fasteners passing through the flange mounting hole 1741. That is, in this embodiment, the hardware board mounting sheet metal 170 is fixedly installed by fixing the ear plate 173 and the mounting flange 174.

[0072] The side of the hardware board mounting plate body 171 is provided with a reinforcing flange 172, and the side with the reinforcing flange 172 is perpendicular to the side with the mounting flange 174, that is, the left and right sides of the hardware board mounting plate body 171 are provided with reinforcing flanges 172, while the side of the front side of the hardware board mounting plate body 171 is not provided with a reinforcing flange 172, so as to facilitate the installation of the first hardware board 310.

[0073] In this embodiment, since the main body 171 of the hardware board mounting plate has a low anti-vibration strength, the main body 171 of the hardware board mounting plate is flanged, which can protect the hardware board fixed thereon, facilitate the disassembly and maintenance of the hardware board, and strengthen the anti-vibration strength of the main body 171 of the hardware board mounting plate. It should be noted that the hardware board mounting sheet metal 170 can also slide with the capacitor module body through the slide groove and slide rail, that is, realize the pull-out design, and after sliding into place, it is fastened by fasteners, and can be operated by one person, making it more convenient to disassemble and assemble the hardware board.

[0074] like Figure 2 As shown, since the position of the lower sheet metal 113 is not easy to disassemble, the hardware board (i.e., the first hardware board) on the lower sheet metal 113 needs to be installed through the hardware board installation sheet metal 170; while the positions of the upper sheet metal 111 and the first back sheet metal 112 are easier to disassemble and assemble the hardware board, so these two positions can directly install the hardware board without the need for sheet metal parts to assist in installation. For the sake of distinction, the hardware board on the upper sheet metal 111 is defined as the second hardware board 320, and the hardware board on the first back sheet metal 112 is defined as the third hardware board 330.

[0075] Specifically, the first mounting fold 115 is arranged on the upper sheet metal 111, that is, the fixing position of the first mounting sheet metal 110 and the mounting back plate 120 is located at the upper part of the first mounting sheet metal 110, and the lower part does not need to be fixed. The fixing point is arranged at the upper part, that is, the first mounting sheet metal 110 is installed in a hanging manner, which can maintain stable and reliable installation under the action of its own weight, and only the upper part needs to be fixed, which is more efficient during disassembly and assembly.

[0076] Furthermore, the upper sheet metal 111 and the lower sheet metal 113 are arranged in parallel and are perpendicular to the first back sheet metal 112. It should be noted that the angle relationship between the three can be designed according to the actual application scenario.

[0077] The upper sheet metal 111 is located above the lower sheet metal 113, and there is a gap between the lower sheet metal 113 and the mounting back plate 120 for the capacitor copper bar 150 to extend out of the capacitor assembly mounting space. That is, the upper sheet metal 111 is longer than the lower sheet metal 113, so that after the first mounting folded edge 115 on the upper sheet metal 111 is attached and fixed to the mounting back plate 120, there is still a certain distance between the lower sheet metal 113 and the mounting back plate 120, and this gap allows the capacitor copper bar 150 to extend out of the capacitor assembly mounting space.

[0078] Furthermore, in order to improve the strength of the first mounting sheet metal 110, the upper sheet metal 111, the lower sheet metal 113 and the first back sheet metal 112 all have a reinforcing fold 114 extending in the direction of the capacitor assembly mounting space, and the reinforcing fold 114 on the upper sheet metal 111 and the lower sheet metal 113 forms a limit for the second mounting sheet metal 160. In this embodiment, by adding reinforcing folds 114 to the upper sheet metal 111, the lower sheet metal 113 and the first back sheet metal 112, the overall strength and bending resistance of the first mounting sheet metal 110 can be improved; in addition, after the second mounting sheet metal 160 is installed with the first mounting sheet metal 110, the reinforcing fold 114 can also increase the limit of the second mounting sheet metal 160, improve the installation reliability of the second mounting sheet metal 160, and assist the second mounting sheet metal 160 in positioning on the first mounting sheet metal 110, so as to facilitate the alignment of the fastening holes between the two.

[0079] like Figure 7 As shown, the second installation sheet metal 160 includes a second back sheet metal 162 and side ventilation sheet metals 161 disposed at both ends of the second back sheet metal 162 and extending in the same direction. The second installation sheet metal 160 is a U-shaped structure.

[0080] A plurality of ventilation holes 1611 are provided on the side ventilation sheet metal 161, and the side ventilation sheet metal 161 has the structural characteristics of a ventilation grille. The capacitor installation space is located between the second back sheet metal 162 and the first back sheet metal 112, and the copper bar installation space is located between the second back sheet metal 162 and the mounting back plate 120. A corresponding number of capacitor installation holes 1621 can be provided on the second back sheet metal 162 according to the number of DC bus capacitors 130 to be fixed. One end of the DC bus capacitor 130 used to connect the capacitor copper bar 150 is fixed at the capacitor installation hole 1621, and the capacitor clamp 140 is sleeved on the DC bus capacitor 130, and the capacitor clamp 140 is fixed to the second back sheet metal 162 by fasteners.

[0081] The side ventilation sheet metal 161 is provided with a second mounting fold 163, which is used to be fixed to the mounting back plate 120 by fasteners, and a corresponding fastening hole 1631 may be provided on the second mounting fold 163. Figure 5As shown, the upper part of the first mounting sheet metal 110 is fixed to the mounting back plate 120, and the left and right sides of the second mounting sheet metal 160 are fixed to the mounting back plate 120, so that the fastening of the first mounting sheet metal 110 and the second mounting sheet metal 160 to the mounting back plate 120 does not affect each other.

[0082] In this embodiment, the second mounting sheet metal 160 can be fixed to the mounting back plate 120 by a support column to support the DC bus capacitor 130. If the second mounting sheet metal 160 is not provided with the side ventilation sheet metal 161, and only the second back sheet metal 162 is provided, the side opening of the copper busbar mounting space formed with the mounting back plate 120 is larger, and the air duct is smoother, but the supporting effect for the DC bus capacitor 130 is poor.

[0083] In order to provide a better support effect for the DC bus capacitor 130, the second mounting sheet metal 160 adopts a U-shaped sheet metal structure, that is, side ventilation sheet metals 161 are added on both sides, such as Figure 7 As shown, it can not only form a heat dissipation duct for the DC bus capacitor 130 and the capacitor copper bar 150 , but also improve the supporting effect of the DC bus capacitor 130 .

[0084] Furthermore, the second back sheet metal 162 is parallel to the first back sheet metal 112, and the side ventilation sheet metal 161 is perpendicular to the first back sheet metal 112, the upper sheet metal 111 and the lower sheet metal 113. In addition, the upper and lower sides of the second back sheet metal 162 are provided with third mounting flanges 164, and the third mounting flanges 164 are connected to the upper sheet metal 111 and the lower sheet metal 113 on the corresponding side through fasteners. That is, the second mounting sheet metal 160 is fixedly connected to the first mounting sheet metal 110 and the mounting back plate 120 at the same time, so that the second mounting sheet metal 160, the first mounting sheet metal 110 and the mounting back plate 120 have higher strength and reliability after being connected.

[0085] It should be noted that, in order to improve the integration of the module, the DC bus capacitor module 100 can be installed as a whole on a vertical plate (not shown in the figure), and in addition to the DC bus capacitor module 100, other modules (such as Figure 1 The power module 200 shown in the figure is then installed as a whole in the cabinet. During maintenance, the cabinet can be removed from the cabinet, or only the corresponding modules on the cabinet can be removed.

[0086] The utility model embodiment also discloses an electrical device, including the DC bus capacitor module 100 disclosed in the above embodiment, which has all the technical effects of the DC bus capacitor module, and will not be described in detail herein. The electrical device can be a frequency conversion cabinet or an electric control cabinet.

[0087] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0088] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0089] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0090] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A DC bus capacitor module, comprising a capacitor module body, characterized in that: It also includes a hardware board mounting sheet metal (170), the hardware board mounting sheet metal (170) includes a hardware board mounting plate body (171) and a fixing ear plate (173) arranged on the hardware board mounting plate body (171), the fixing ear plate (173) is used to fit on the side of the capacitor module body facing the door body of the cabinet, and is connected to the capacitor module body through fasteners, and the hardware board mounting plate body (171) is used to install the first hardware board (310).

2. The DC bus capacitor module according to claim 1, characterized in that: The capacitor module body comprises: A first mounting sheet metal (110) and a mounting back plate (120), wherein the first mounting sheet metal (110) is mounted on the mounting back plate (120) and forms a capacitor assembly mounting space between the first mounting sheet metal (110) and the mounting back plate (120), wherein the mounting back plate (120) has a mounting portion for mounting, the hardware board mounting sheet metal (170) is arranged on the lower side of the first mounting sheet metal (110), and the fixing ear plate (173) is fixed on the first mounting sheet metal (110); A second installation sheet metal (160) is arranged in the capacitor assembly installation space and divides the capacitor assembly installation space into a copper busbar installation space and a capacitor installation space; A DC bus capacitor assembly comprises a DC bus capacitor (130) and a capacitor copper bus (150) electrically connected to the DC bus capacitor, wherein the DC bus capacitor (130) is arranged in the capacitor installation space, and the capacitor copper bus (150) is arranged in the copper bus installation space.

3. The DC bus capacitor module according to claim 2, characterized in that: The copper busbar installation space is formed between the second installation sheet metal (160) and the installation back plate (120); The capacitor installation space is formed between the first installation sheet metal (110) and the second installation sheet metal (160); The DC bus capacitor (130) is fixed to the second mounting sheet metal (160) via a capacitor clamp (140).

4. The DC bus capacitor module according to claim 2, characterized in that: The first installation sheet metal (110) comprises a first back sheet metal (112) and an upper sheet metal (111) and a lower sheet metal (113) which are arranged at two ends of the first back sheet metal (112) and extend in the same direction, and one of the upper sheet metal (111) and the lower sheet metal (113) is provided with a first installation folding edge (115), the first installation folding edge (115) is used to be fixed to the installation back plate (120) by means of a fastener, and the first installation folding edge (115) extends to the outside of the capacitor assembly installation space; The hardware board mounting plate body (171) is attached to the lower sheet metal (113), and the fixing ear plate (173) is fixed on the first back sheet metal (112).

5. The DC bus capacitor module according to claim 4, characterized in that: A mounting flange (174) is provided on one side of the hardware board mounting plate body (171) close to the capacitor copper bar (150), and the mounting flange (174) has a flange mounting hole (1741); A reinforcing flange (172) is provided on the side of the hardware board mounting plate body (171), and the side on which the reinforcing flange (172) is provided is perpendicular to the side on which the mounting flange (174) is provided.

6. The DC bus capacitor module according to claim 4, characterized in that: The upper sheet metal (111) and the lower sheet metal (113) are arranged in parallel and are both perpendicular to the first back sheet metal (112); The upper sheet metal (111) is located above the lower sheet metal (113), and a gap is provided between the lower sheet metal (113) and the mounting back plate (120) for the capacitor copper bar (150) to extend out of the capacitor assembly mounting space.

7. The DC bus capacitor module according to claim 4, characterized in that: The second mounting sheet metal (160) comprises a second back sheet metal (162) and side ventilation sheet metals (161) arranged at two ends of the second back sheet metal (162) and extending in the same direction, and a plurality of ventilation holes (1611) are arranged on the side ventilation sheet metal (161); The capacitor installation space is located between the second back sheet metal (162) and the first back sheet metal (112), and the copper bar installation space is located between the second back sheet metal (162) and the installation back plate (120); The side ventilation sheet metal (161) is provided with a second mounting folded edge (163), and the second mounting folded edge (163) is used to be fixed to the mounting back plate (120) by means of fasteners.

8. The DC bus capacitor module according to claim 7, characterized in that: The second back sheet metal (162) is parallel to the first back sheet metal (112), and the side ventilation sheet metal (161) is perpendicular to the first back sheet metal (112), the upper sheet metal (111) and the lower sheet metal (113).

9. The DC bus capacitor module according to claim 7, characterized in that: The upper and lower sides of the second back sheet metal (162) are both provided with third mounting folded edges (164), and the third mounting folded edges (164) are connected to the upper sheet metal (111) and the lower sheet metal (113) on the corresponding sides through fasteners.

10. An electrical device, characterized in that: It comprises the DC bus capacitor module (100) according to any one of claims 1 to 9, wherein the electrical equipment is a frequency conversion cabinet or an electric control cabinet.

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