Cascade frequency converter power cabinet

Abstract

The utility model discloses a cascade frequency converter power cabinet, which comprises at least one power unit cabinet connected side by side, the power unit cabinet comprises a cabinet body, the interior of the cabinet body is sequentially divided into at least three cavities from top to bottom, and a plurality of power units are installed in each cavity side by side. The plurality of power units located in the same cavity are connected through cascade copper bars; a neutral point connecting bar and a current sampling module integrated on the neutral point connecting bar are connected between the power units between two adjacent cavities; the power unit in each cavity is connected with a voltage sampling module and an output copper bar. The top of the cabinet body is also provided with a heat dissipation structure for pumping out internal hot air. The power cabinet is designed into unit modules, and different numbers of unit modules are selected for combined use according to use requirements, so that the volume and the weight of the unit modules are reduced, and transportation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to frequency converter technical field especially relates to a kind of cascaded frequency converter power cabinet. BACKGROUND

[0002] Power cabinet is the important component unit in frequency converter, realizes voltage promotion processing by integrated power unit, according to voltage boost processing demand, and several power units are integrated inside, and are connected by copper bar, the volume of entire power cabinet is larger, and internal integration is higher, when transporting and carrying, the whole needs to be lifted and transported, overall volume is large, weight is high, cause inconvenient transportation, and it is difficult to form good protection in the process of transportation, need to be disassembled and repaired on site after damage, operation is also more cumbersome.

[0003] Therefore, the problem that the existing power cabinet integration is too high to cause volume increase and weight increase needs to be solved. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of cascaded frequency converter power cabinet, power cabinet is designed as unit module, different number of unit modules are selected to be used in combination according to use needs, reduce the volume, weight of unit module, to facilitate transportation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of cascaded frequency converter power cabinet, including at least one power unit cabinet connected side by side, the power unit cabinet includes cabinet body, the cabinet body is sequentially separated into at least three cavities from top to bottom inside, a plurality of power units are respectively installed in each cavity side by side, and the plurality of power units in the same cavity are connected by cascading copper bar;The power unit between adjacent two cavities is connected with neutral point connecting row and current sampling module integrated on neutral point connecting row;The power unit in each cavity is respectively connected with voltage sampling module and output copper bar;The cabinet body top is also provided with heat dissipation structure that extracts internal hot air.

[0007] Preferably, the cabinet body is provided with insulating partition plate between adjacent two cavities, and an insulating frame is installed in each cavity, and the power unit is installed in the insulating frame.

[0008] Preferably, the heat dissipation structure includes heat dissipation box fixed on the cabinet body, the bottom of the heat dissipation box is communicated with the cabinet body, a fan is installed in the heat dissipation box, and an air outlet is formed in the side surface of the heat dissipation box;The air outlet is installed with filter screen.

[0009] Preferably, the heat dissipation box is installed with cover plate for shielding the air outlet, and the cover plate is detachably installed on the heat dissipation box.

[0010] Preferably, the number of the heat dissipation structures is at least two, and at least two of the heat dissipation structures are installed side by side on the cabinet body.

[0011] Preferably, a first connecting groove is formed on one side surface of the cabinet body, a plurality of first mounting blocks are longitudinally and spacedly arranged in the first connecting groove, a second connecting groove is formed on another side surface of the cabinet body, and a second mounting block matched with the first mounting block is arranged in the second connecting groove.

[0012] Preferably, the first mounting block and the second mounting block are both connecting blocks in a bent structure.

[0013] Preferably, the cabinet body is a sheet metal forming structure.

[0014] Beneficial effects:

[0015] By designing the power unit cabinet and partitioning the cabinet body into three cavities, independent installation of each layer of power unit is realized, and the power unit cabinet can be independently cooled by the heat dissipation structure on the top of the cabinet body; thus, the power unit cabinet can be transported and assembled according to the actual number of the site, and the unitized overall volume is small and the weight is low, facilitating transportation and protection; meanwhile, the internal power units are stably connected by cascading copper bars to reduce the resistance, thereby facilitating the guarantee of output voltage. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic diagram of the embodiment of the utility model;

[0017] Figure 2 is a front view structure schematic diagram of the embodiment of the utility model;

[0018] Figure 3 is a structure schematic diagram of the heat dissipation structure in the embodiment of the utility model;

[0019] Figure 4 is a first embodiment of parallel application of the utility model;

[0020] Figure 5 is a second embodiment of parallel application of the utility model;

[0021] In Figures 1 to 5 , the correspondence between the component name or line and the drawing number is as follows:

[0022] Power unit cabinet 100, cabinet 1, first connecting groove 101, first mounting block 102 cavity 2, power unit 3, cascade copper bar 4, neutral point connecting bar 5, current sampling module 6, voltage sampling module 7, output copper bar 8, heat dissipation structure 9, heat dissipation box 91, fan 92, air outlet 93, filter screen 94, cover plate 95. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0024] Referring to Figures 1-3 The embodiment of the present application proposes a cascade frequency converter power cabinet, which comprises at least one power unit cabinet 100 connected side by side. The power unit cabinet 100 forms a modular unit with independent functions. According to the actual number of requirements, the power unit cabinet 100 can be used in parallel, thereby reducing the volume and weight of each power unit cabinet 100, facilitating transportation and protection. Specifically, the power unit cabinet 100 comprises a cabinet 1, and the inside of the cabinet 1 is divided into at least three cavities 2 from top to bottom. A plurality of power units 3 are installed side by side in each cavity 2. The plurality of power units 3 in the same cavity 2 are connected by a cascade copper bar 4. By dividing into three independent cavities 2, the power units 3 of different layers are formed to avoid the risk of interference during use. At the same time, the cascade copper bar 4 is used for electrical connection, thereby reducing the resistance between the power units 3 of the same layer and improving the conductivity stability. Specifically, a neutral point connecting bar 5 and a current sampling module 6 integrated on the neutral point connecting bar 5 are connected between the power units 3 of the adjacent two cavities 2. The power units 3 of different layers are connected through the neutral point connecting bar 5, and the current sampling module 6 is integrated to realize current sampling.

[0025] The power units 3 in each cavity 2 are respectively connected with a voltage sampling module 7 and an output copper bar 8. The output copper bar 8 is an output voltage, and voltage sampling is performed at the same time.

[0026] It should be noted that each electrical component constituting the power unit cabinet 100 can use existing devices. The embodiment mainly realizes integrated assembly in a small volume.

[0027] At the same time, the cabinet 1 is also provided with a heat dissipation structure 9 for extracting internal hot air. By independently integrating the heat dissipation structure 9 on each power unit cabinet 100, independent heat dissipation can be realized, thereby ensuring the heat dissipation effect when multiple power unit cabinets 100 are used in parallel.

[0028] The heat dissipation structure 9 comprises a heat dissipation box 91 fixed on the cabinet body 1, the bottom of the heat dissipation box 91 is communicated with the cabinet body 1, a fan 92 is installed in the heat dissipation box 91, a side surface of the heat dissipation box 91 is provided with an air outlet 93, and a filter screen 94 is installed at the air outlet 93. The internal hot air is sucked out through the air outlet 93 by the fan 92, the heat dissipation is accelerated, and the filter screen 94 is used to avoid the pollution caused by the external impurities entering the cabinet body 1.

[0029] Meanwhile, a cover plate 95 for shielding the air outlet 93 is installed on the heat dissipation box 91, the cover plate 95 is detachably installed on the heat dissipation box 91, and the cover plate 95 can be adjusted according to the heat dissipation direction to shield the air outlet 93.

[0030] In order to meet the heat dissipation effect, the number of the heat dissipation structure 9 is at least two, and at least two heat dissipation structures 9 are installed side by side on the cabinet body 1.

[0031] Specifically, an insulating partition plate is arranged between the adjacent two cavities 2 in the cabinet body 1, an insulating frame is installed in each cavity 2, the power unit 3 is installed in the insulating frame, the insulating partition plate is used to realize the insulating isolation between the adjacent cavities 2, and the insulating frame is used to realize the insulating installation of the power unit 3, so as to meet the creepage distance requirement between the power unit 3 and the cabinet body 1.

[0032] In order to facilitate the connection between the adjacent cabinet bodies 1 and realize the combined application, a first connecting groove 101 is formed in one side surface of the cabinet body 1, a plurality of first mounting blocks 102 are arranged in the first connecting groove 101 in a longitudinal direction, a second connecting groove is formed in the other side surface of the cabinet body 1, and a second mounting block matched with the first mounting block 102 is arranged in the second connecting groove. The first mounting block 102 and the second mounting block are both connecting blocks in a bent structure, the horizontal extension part is matched to facilitate the locking of the first mounting block 102 and the second mounting block through a screw, the connection between the adjacent two cabinet bodies 1 is realized, and the parallel use of the power unit cabinets 100 is completed. Figure 4 Figure 5 As shown in FIG. 8, it is a structure schematic view of the parallel application of a plurality of power unit cabinets 100.

[0033] Meanwhile, the entire cabinet body 1 is a sheet metal forming structure, which is beneficial to the standardized manufacturing of the cabinet body 1, facilitates the subsequent parallel combination use, and is also beneficial to the protection treatment of each power unit cabinet 100.

[0034] ​In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be direct connection, also can through intermediate medium indirectly connect, can be two element internal communication or two element's mutual action relationship. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.

[0035] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer" and so on is based on the orientation or position relationship shown in the drawing, or is the orientation or position relationship of the utility model product when using, just for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, construct and operate with a particular orientation, therefore can not be understood as the limitation of the utility model. In addition, the terms "first", "second" and so on are only used for distinguishing description, and can not be understood as indicative or suggestive of relative importance.

[0036] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure reference in the claims should not be regarded as limiting the claims involved.

Claims

1. A cascaded frequency converter power cabinet, characterized in that: It includes at least one power unit cabinet (100) connected side by side. The power unit cabinet (100) includes a cabinet body (1). The cabinet body (1) is divided into at least three cavities (2) from top to bottom. Multiple power units (3) are installed side by side in each cavity (2). Multiple power units (3) located in the same cavity (2) are connected by cascaded copper busbars (4). A neutral point connection bar (5) and a current sampling module (6) integrated on the neutral point connection bar (5) are connected between the power units (3) between two adjacent cavities (2). Each cavity (2) has a power unit (3) connected to a voltage sampling module (7) and an output copper busbar (8). The top of the cabinet (1) is also provided with a heat dissipation structure (9) for extracting internal hot air.

2. The cascaded frequency converter power cabinet according to claim 1, characterized in that: The cabinet (1) is provided with an insulating partition between two adjacent cavities (2), and each cavity (2) is equipped with an insulating frame. The power unit (3) is installed in the insulating frame.

3. A cascaded frequency converter power cabinet according to claim 1 or 2, characterized in that: The heat dissipation structure (9) includes a heat dissipation box (91) fixed on the cabinet (1), the bottom of the heat dissipation box (91) is connected to the cabinet (1), a fan (92) is installed inside the heat dissipation box (91), and an air outlet (93) is opened on the side of the heat dissipation box (91). The air outlet (93) is equipped with a filter (94).

4. The cascaded frequency converter power cabinet according to claim 3, characterized in that: The heat sink (91) is equipped with a cover plate (95) for covering the air outlet (93), and the cover plate (95) is detachably installed on the heat sink (91).

5. A cascaded frequency converter power cabinet according to claim 4, characterized in that: The number of heat dissipation structures (9) is at least two, and at least two heat dissipation structures (9) are installed side by side on the cabinet (1).

6. A cascaded frequency converter power cabinet according to claim 5, characterized in that: A first connecting groove (101) is provided on one side of the cabinet (1), and a plurality of first mounting blocks (102) are arranged longitudinally in the first connecting groove (101). A second connecting groove is provided on the other side of the cabinet (1), and a second mounting block that cooperates with the first mounting block (102) is provided in the second connecting groove.

7. A cascaded frequency converter power cabinet according to claim 6, characterized in that: Both the first mounting block (102) and the second mounting block are connecting blocks with bent structures.

8. A cascaded frequency converter power cabinet according to claim 7, characterized in that: The cabinet (1) is a sheet metal forming structure.

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