Single-phase frequency converter integrated system cabinet and frequency conversion equipment

Abstract

This utility model discloses a single-phase frequency converter integrated system cabinet and frequency converter equipment. The single-phase frequency converter integrated system cabinet includes a cabinet and three single-phase frequency converters. The three single-phase frequency converters are housed inside the cabinet. The positive conductors of the three single-phase frequency converters are connected in parallel via a positive busbar, and the negative conductors of the three single-phase frequency converters are connected in parallel via a negative busbar. The side of the cabinet has reserved parallel connection holes, and the positive and negative busbars correspond to the reserved parallel connection holes. Reserved parallel installation holes are also provided on the positive and negative busbars. When power expansion is required, the reserved parallel connection holes of two cabinets of the same type can be aligned, and then connected to the reserved parallel installation holes in the two cabinets via parallel connection conductors to achieve parallel operation. Furthermore, it eliminates the need to reserve space for installing additional single-phase frequency converters within a single single-phase frequency converter integrated system cabinet, thus reducing the size of a single single-phase frequency converter integrated system cabinet.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a single-phase frequency converter integrated system cabinet and frequency converter equipment. Background Technology

[0002] For existing frequency converter integrated system cabinets, taking the book-type frequency converter unit integrated system cabinet as an example, its unit module is usually a complete three-phase integrated structure. If a system cabinet with higher power is to be implemented, multiple unit modules of the same type need to be installed in parallel in the cabinet.

[0003] However, during the paralleling process, there are problems such as inconvenient installation and low space utilization within the rack, resulting in higher costs.

[0004] Therefore, how to facilitate the power expansion of the frequency converter integrated system cabinet is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this utility model is to provide a single-phase frequency converter integrated system cabinet that facilitates power expansion, and another objective is to provide a frequency converter device including the above-mentioned single-phase frequency converter integrated system cabinet.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A single-phase frequency converter integrated system cabinet includes: a cabinet and three single-phase frequency converters. The three single-phase frequency converters are housed in the cabinet. The positive conductors of the three single-phase frequency converters are connected in parallel via a positive busbar, and the negative conductors of the three single-phase frequency converters are connected in parallel via a negative busbar. The side of the cabinet is provided with a reserved parallel connection hole. The positive busbar and the negative busbar correspond to the reserved parallel connection hole, and the positive busbar and the negative busbar are provided with reserved parallel connection mounting holes.

[0008] In some embodiments, at least one input reactor and / or at least one output reactor are provided at the bottom of the cabinet. The input reactor is connected to the input terminal of the single-phase frequency converter via an input busbar, and the output reactor is connected to the output terminal of the single-phase frequency converter via an output busbar.

[0009] In some embodiments, a reactor bracket is provided at the bottom of the cabinet, and the reactor bracket is provided with a plurality of horizontally distributed mounting hole groups, and the input reactor or the output reactor is selectively installed in one of the mounting hole groups.

[0010] In some embodiments, the bottom of the cabinet is provided with a cable entry / exit port for the entire unit.

[0011] In some embodiments, the output busbar is provided with a Hall element.

[0012] In some embodiments, the cabinet includes a frame and a left side panel and a right side panel disposed on the frame. The left side panel and the right side panel are detachably connected to the frame, and the left side panel and / or the right side panel are provided with the reserved parallel operation hole.

[0013] In some embodiments, the cabinet further includes a front door and a rear door disposed on the frame, the front door and the rear door being closably connected to the frame.

[0014] In some embodiments, air inlets are provided at the bottom of the front door and the rear door, respectively.

[0015] In some embodiments, the top of the cabinet is provided with a heat dissipation component, which is used to draw external cold air into the cabinet through the air inlet for heat exchange and exhaust it through the top of the cabinet.

[0016] In some embodiments, the top of the cabinet is further provided with three buffer components, which are connected to the positive busbar via a buffer conductive busbar.

[0017] In some embodiments, a system control panel assembly is also provided in the middle of the cabinet. The system control panel assembly is connected to the three single-phase frequency converters respectively and is used to define the phase sequence of the three single-phase frequency converters.

[0018] In some embodiments, the front of the frame is provided with a transparent PC protective plate and a heat dissipation protective plate.

[0019] In some embodiments, the cabinet is provided with guide rails, and the single-phase frequency converter is slidably connected to the guide rails.

[0020] A frequency converter device includes a single-phase frequency converter integrated system cabinet as described in any of the above claims, and further includes a parallel connection busbar. Two adjacent single-phase frequency converter integrated system cabinets are connected through the parallel connection busbar. One end of the parallel connection busbar is connected to the reserved parallel mounting hole of one of the single-phase frequency converter integrated system cabinets, and the other end is connected to the reserved parallel mounting hole of the other single-phase frequency converter integrated system cabinet.

[0021] Compared with existing technologies, the above technical solution has the following advantages:

[0022] This utility model provides a single-phase frequency converter integrated system cabinet, which can be used individually or in parallel. When the power of the system cabinet needs to be expanded, the reserved parallel installation holes of two similar cabinets can be aligned, and then the parallel connection busbar can be connected to the reserved parallel installation holes in the two cabinets to achieve parallel operation of two single-phase frequency converter integrated system cabinets. In addition, if a larger power expansion is required, multiple single-phase frequency converter integrated system cabinets can be paralleled sequentially. Compared with the method of expanding power in a single single-phase frequency converter integrated system cabinet, this solution does not require reserving space for installing single-phase frequency converters in a single single-phase frequency converter integrated system cabinet, which can reduce the size of a single single-phase frequency converter integrated system cabinet. Moreover, when disassembling the paralleled equipment, it is only necessary to disconnect the parallel connection busbar from the two adjacent cabinets, thus also having the advantage of convenient disassembly.

[0023] The frequency converter provided by this utility model has corresponding advantages because it includes the above-mentioned single-phase frequency converter integrated system cabinet, which will not be elaborated here. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of a single-phase frequency converter integrated system cabinet with the front door in the open state, provided for a specific embodiment of this utility model;

[0026] Figure 2 A schematic diagram of the internal structure of a single-phase frequency converter integrated system cabinet provided for a specific embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of a single-phase frequency converter integrated system cabinet with an input reactor and an output reactor installed inside the cabinet, which is provided as a specific embodiment of the present utility model.

[0028] Figure 4 A schematic diagram of the structure of a single-phase frequency converter integrated system cabinet with the input reactor installed on one side, provided for a specific embodiment of this utility model;

[0029] Figure 5 A schematic diagram of the structure of a single-phase frequency converter integrated system cabinet with the input reactor installed in the middle, according to a specific embodiment of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of a single-phase frequency converter integrated system cabinet with a transparent PC protective plate and a heat dissipation protective plate installed in front of the cabinet, which is provided for a specific embodiment of the present utility model.

[0031] Figure 7 A three-dimensional structural diagram of a single-phase frequency converter integrated system cabinet after parallel operation, provided for a specific embodiment of this utility model;

[0032] Figure 8 A schematic diagram of the main structure of a single-phase frequency converter integrated system cabinet after parallel operation, provided for a specific embodiment of this utility model;

[0033] Figure 9 A schematic diagram of the heat dissipation assembly of a single-phase frequency converter integrated system cabinet provided for a specific embodiment of this utility model;

[0034] Figure 10 This is a schematic diagram of the guide rail structure of a single-phase frequency converter integrated system cabinet provided for a specific embodiment of this utility model.

[0035] The attached figures are labeled as follows:

[0036] 100-Rack, 1001-Parallel mounting hole, 101-Frame, 102-Front door, 103-Rear door, 104-Side panel, 1041-Left side panel, 1042-Right side panel, 105-Top exhaust shroud, 106-Transparent PC protective panel, 107-Heat dissipation protective panel, 108-Guide rail, 109-Grounding bar, 110-Remote control keyboard;

[0037] 200 - Single-phase frequency converter, 300 - Parallel connection busbar, 400 - Input reactor, 500 - Output reactor, 600 - Heat dissipation assembly, 700 - Buffer assembly, 800 - System control panel assembly, 900 - Insulation paper assembly, 1000 - Hall element. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please refer to Figures 1 to 10 .

[0040] This utility model provides a single-phase frequency converter integrated system cabinet, including: a cabinet 100 and three single-phase frequency converters 200, as shown in the embodiment of the present invention. Figure 1 As shown, three single-phase frequency converters 200 are housed inside the cabinet 100. For example, the three single-phase frequency converters 200 can be installed side-by-side inside the cabinet 100. The positive terminals of the three single-phase frequency converters 200 are connected in parallel through a positive busbar, and the negative terminals of the three single-phase frequency converters 200 are connected in parallel through a negative busbar to form a three-phase frequency converter circuit. Figure 2 As shown, the side of the cabinet 100 is provided with a reserved parallel connection hole 1001. The positive busbar and negative busbar correspond to the reserved parallel connection hole 1001, and the positive busbar and negative busbar are also provided with reserved parallel connection mounting holes. The aforementioned single-phase frequency converter integrated system cabinet can be used alone or in parallel with multiple units. Figure 7 and Figure 8 As shown, when it is necessary to expand the power of the system cabinet, the reserved parallel connection holes 1001 of two similar cabinets 100 can be aligned, and then the parallel connection busbar 300 can be connected to the reserved parallel connection mounting holes in the two cabinets 100 to realize the parallel operation of two single-phase frequency converter integrated system cabinets. In addition, if a larger power expansion is required, multiple single-phase frequency converter integrated system cabinets can be paralleled in sequence. For example, if the power density of a single single-phase frequency converter integrated system cabinet is 800kW, when multiple cabinets are used in parallel, the power density is 800*NkW, where N is the number of single-phase frequency converter integrated system cabinets. Compared to the method of expanding power within a single single-phase inverter integrated system cabinet, this solution does not require reserving space within a single single-phase inverter integrated system cabinet for installing expansion single-phase inverters 200, thus reducing the size of a single single-phase inverter integrated system cabinet. Furthermore, when disassembling the paralleled equipment, it is only necessary to disconnect the parallel conductive connection bar from the two adjacent cabinets 100, thus also having the advantage of convenient disassembly.

[0041] In some embodiments, such as Figures 3-5As shown, the bottom of the cabinet 100 is provided with at least one input reactor 400 and / or at least one output reactor 500. That is, the cabinet 100 can be provided with only one input reactor 400 or one output reactor 500, or multiple input reactors 400 or multiple output reactors 500. The input reactor 400 is connected to the input terminal of the single-phase frequency converter 200 through an input busbar, and the output reactor 500 is connected to the output terminal of the single-phase frequency converter 200 through an output busbar. In order to facilitate wiring, the input terminal of the single-phase frequency converter is provided with an input busbar, and the output terminal is provided with an output busbar. A Hall element 1000 is provided on the output busbar. For example, when there are three single-phase frequency converters 200 in the cabinet 100, three input reactors 400 and / or three output reactors 500 can be installed in the cabinet 100 to meet different application scenarios and cost requirements. When it is not necessary to install output reactors 500, only input reactors 400 can be installed at the bottom of the cabinet 100; when it is not necessary to install input reactors 400, only output reactors 500 can be installed at the bottom of the cabinet 100.

[0042] In some embodiments, a reactor bracket is provided at the bottom of the cabinet 100. The reactor bracket has multiple horizontally distributed mounting hole groups. For example, the reactor bracket can be a crossbeam located at the bottom of the cabinet 100, with three horizontally distributed mounting hole groups on the crossbeam: a left mounting hole group, a middle mounting hole group, and a right mounting hole group. The input reactor 400 or the output reactor 500 can be selectively installed in one of the mounting hole groups to meet different installation requirements. In addition, the bottom of the cabinet 100 has a cable entry / exit hole for connecting to the input reactor 400 and the output reactor 500 at the bottom of the cabinet 100.

[0043] In some embodiments, such as Figure 6As shown, the cabinet 100 includes a frame 101 and side panels, a front door 102, and a rear door 103 mounted on the frame 101. The side panels include a left side panel 1041 and a right side panel 1042, which are detachably connected to the frame 101, for example, by screws. The left side panel 1041 and / or the right side panel 1042 are provided with reserved parallel operation holes 1001. For example, when it is necessary to parallel operate three single-phase frequency converter integrated system cabinets, the single-phase frequency converter located on the left side can be connected. Remove the right side panel 1042 of the integrated system cabinet. Then, remove the left side panel 1041 and right side panel 1042 of the single-phase inverter integrated system cabinet located in the middle. Remove the left side panel 1041 of the right-side single-phase inverter integrated system cabinet. Then, connect the three single-phase inverter integrated system cabinets sequentially from left to right. At this point, the entire unit consists of only one left side panel 1041 and one right side panel 1042. To improve the connection stability of each cabinet 100, adjacent cabinets 100 are reinforced with sheet metal parts. To facilitate the installation of components within the cabinets 100, the front door 102 and rear door 103 are closable and connected to the frame 101. For example, one side of the front door 102 can be hinged to the frame 101, and a lock is designed on the other side of the front door 102 to fix it to the frame 101. To facilitate heat dissipation within the cabinet 100, air inlets are provided at the bottom of the front door 102 and the rear door 103, respectively. Furthermore, filters can be installed at the air inlets of the front door 102 and the rear door 103.

[0044] In some embodiments, a heat dissipation assembly 600 is provided on the top of the rack 100. The heat dissipation assembly 600 draws external cold air into the rack 100 through the air inlet for heat exchange and exhausts it through the top of the rack 100. That is, the heat dissipation method of the rack 100 is bottom intake and top exhaust. The heat dissipation assembly 600 includes an axial fan and a fan housing. The axial fan can be pre-installed in the fan housing, and then the fan housing is installed on the top of the rack 100. Furthermore, a top exhaust shroud 105 can be provided on the top of the rack 100, with an air outlet on one side. To facilitate the installation of the fan housing, a gourd-shaped hole can be provided on the fan housing, for example... Figure 9 As shown, two hoist holes can be provided on the left and right sides of the upper part of the fan box. In addition, the fan box is also equipped with a fan plug-in adapter cable to facilitate quick installation and maintenance of the axial fans. To improve the heat dissipation effect, three axial fans arranged side by side in a horizontal direction can be installed on the top of the rack 100.

[0045] In some embodiments, the cabinet 100 of the single-phase inverter integrated system cabinet is further provided with a buffer component 700 and a system control panel component 800. The buffer component 700 can reduce the voltage or current surges encountered by the single-phase inverter 200 and ensure the stable operation of the single-phase inverter 200. There are three buffer components 700, which are located at the top of the cabinet 100. The three buffer components 700 are connected to the positive busbar in parallel through a buffer conductive busbar. The heat dissipation component 600 is located above the buffer components 700. The system control panel assembly 800 is located in the center of the cabinet 100, below the single-phase frequency converters 200. The system control panel assembly 800 is connected to each of the three single-phase frequency converters 200 and is used to define the phase sequence of the three single-phase frequency converters 200. The system control panel assembly 800 can be fixed to the front of the cabinet 100 with screws, and connects to various circuit board components via cables. The control circuit is fixed on the system control panel assembly 800 for easy maintenance of its components. To provide electrical protection for the components on the system control panel assembly 800, an insulating paper assembly 900 is provided. Furthermore, for ease of operation, a remote control keyboard 110 can be installed on the front door 102 to remotely control the entire system. The remote control keyboard 110 also features a visual display of relevant function code parameters.

[0046] In some embodiments, to improve the security of the cabinet 100, such as Figure 6 As shown, a transparent PC protective plate 106 is provided at the front of the frame 101, covering the buffer assembly 700, the unidirectional frequency converter 200, and the system control panel assembly 800. A heat dissipation protective plate 107 is provided at the front of the frame 101, located below the transparent PC protective plate 106, covering the front of the input reactor 400 and the output reactor 500. The transparent PC protective plate 106 and the heat dissipation protective plate 107 prevent electrical and conductive components inside the cabinet 100 from being exposed and causing injury. The heat dissipation protective plate 107 has ventilation holes, and ventilation holes are also provided on the front door 102 in the area corresponding to the heat dissipation protective plate 107. A grounding busbar 109 is fixed to the bottom of the front of the frame 101 to meet the grounding requirements of the entire system.

[0047] In some embodiments, for ease of installation of the single-phase frequency converter 200, such as Figure 2 and Figure 10 As shown, the cabinet 100 is equipped with a guide rail 108. The single-phase frequency converter 200 is slidably connected to the guide rail 108. After the frequency converter is pushed into the cabinet 100 along the guide rail 108, it can be fixed in the cabinet 100 with screws to lock the position of the frequency converter in the cabinet 100. When it is necessary to remove the single-phase frequency converter 200, the screws can be removed first, and then the single-phase frequency converter 200 can be pulled outward.

[0048] This utility model embodiment also provides a frequency converter device, including the single-phase frequency converter integrated system cabinet provided in any of the above embodiments, and further including a parallel-connected busbar 300, such as... Figure 7 and Figure 8 As shown, two adjacent single-phase frequency converter integrated system cabinets are connected by a parallel connection busbar 300. One end of the parallel connection busbar 300 is connected to a reserved parallel mounting hole in one of the single-phase frequency converter integrated system cabinets, and the other end is connected to a reserved parallel mounting hole in the other single-phase frequency converter integrated system cabinet. The parallel connection busbar 300 includes a positive parallel connection busbar and a negative parallel connection busbar. The positive parallel connection busbar is connected to the positive busbar, and the negative parallel connection busbar is connected to the negative busbar. Regarding the beneficial effects of the frequency converter equipment, please refer to the beneficial effects of the single-phase frequency converter integrated system cabinets described above; further details are omitted here.

[0049] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0050] The above provides a detailed description of the single-phase frequency converter integrated system cabinet and frequency converter equipment provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A single-phase frequency converter integrated system cabinet, characterized in that, include: The cabinet (100) and three single-phase frequency converters (200) are located inside the cabinet (100). The positive conductors of the three single-phase frequency converters (200) are connected in parallel through a positive busbar, and the negative conductors of the three single-phase frequency converters (200) are connected in parallel through a negative busbar. The side of the cabinet (100) is provided with a reserved parallel connection hole (1001). The positive busbar and the negative busbar correspond to the reserved parallel connection hole (1001), and the positive busbar and the negative busbar are provided with reserved parallel connection mounting holes.

2. The single-phase frequency converter integrated system cabinet according to claim 1, characterized in that, At least one input reactor (400) and / or at least one output reactor (500) are provided at the bottom of the cabinet (100). The input reactor (400) is connected to the input terminal of the single-phase frequency converter (200) through an input busbar, and the output reactor (500) is connected to the output terminal of the single-phase frequency converter (200) through an output busbar.

3. The single-phase frequency converter integrated system cabinet according to claim 2, characterized in that, The bottom of the cabinet (100) is provided with a reactor bracket, and the reactor bracket is provided with a plurality of mounting holes distributed in the horizontal direction. The input reactor (400) or the output reactor (500) is selectively installed in one of the mounting hole groups.

4. The single-phase frequency converter integrated system cabinet according to claim 3, characterized in that, The bottom of the cabinet (100) is provided with a cable entry and exit hole for the whole machine.

5. The single-phase frequency converter integrated system cabinet according to claim 2, characterized in that, The output busbar is equipped with a Hall element (1000).

6. The single-phase frequency converter integrated system cabinet according to claim 1, characterized in that, The cabinet (100) includes a frame (101) and a left side panel (1041) and a right side panel (1042) disposed on the frame (101). The left side panel (1041) and the right side panel (1042) are detachably connected to the frame (101). The left side panel (1041) and / or the right side panel (1042) are provided with the reserved parallel operation hole (1001).

7. The single-phase frequency converter integrated system cabinet according to claim 6, characterized in that, The cabinet (100) also includes a front door (102) and a rear door (103) disposed on the frame (101), the front door (102) and the rear door (103) being closably connected to the frame (101).

8. The single-phase frequency converter integrated system cabinet according to claim 7, characterized in that, The bottom of the front door (102) and the rear door (103) are respectively provided with air inlets.

9. The single-phase frequency converter integrated system cabinet according to claim 8, characterized in that, The top of the cabinet (100) is provided with a heat dissipation component (600), which is used to draw external cold air into the cabinet (100) through the air inlet for heat exchange and discharge it through the top of the cabinet (100).

10. The single-phase frequency converter integrated system cabinet according to claim 1, characterized in that, The top of the cabinet (100) is also provided with three buffer components (700), and the three buffer components (700) are connected to the positive busbar through a buffer conductive busbar in parallel.

11. The single-phase frequency converter integrated system cabinet according to claim 1, characterized in that, The cabinet (100) is also equipped with a system control panel assembly (800), which is connected to the three single-phase frequency converters (200) respectively and is used to define the phase sequence of the three single-phase frequency converters (200).

12. The single-phase frequency converter integrated system cabinet according to claim 6, characterized in that, The frame (101) has a transparent PC protective plate (106) and a heat dissipation protective plate (107) on the front.

13. The single-phase frequency converter integrated system cabinet according to claim 1, characterized in that, The cabinet (100) is equipped with a guide rail (108), and the single-phase frequency converter (200) is slidably connected to the guide rail (108).

14. A frequency converter, characterized in that, The single-phase frequency converter integrated system cabinet according to any one of claims 1 to 13 further includes a parallel connection busbar (300), two adjacent single-phase frequency converter integrated system cabinets are connected by the parallel connection busbar (300), one end of the parallel connection busbar (300) is connected to the reserved parallel installation hole of one of the single-phase frequency converter integrated system cabinets, and the other end is connected to the reserved parallel installation hole of the other single-phase frequency converter integrated system cabinet.

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