Power unit and frequency converter with same

Abstract

The utility model provides a power unit and a frequency converter having the same, the power unit comprises an inversion module, a rectification module, a first capacitor module and a second capacitor module, the inversion module and the first capacitor module are arranged side by side, and the rectification module and the second capacitor module are arranged side by side; one part of the first busbar is connected with the inversion module, and the other part of the first busbar is connected with the first capacitor module; one part of the second busbar is connected with the rectifier module, and the other part of the second busbar is connected with the second capacitor module. According to the technical scheme provided by the utility model, the technical problem that the assembling mode of the power unit in the prior art is relatively complex can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of frequency converter, specifically, a kind of power unit and the frequency converter with it. BACKGROUND

[0002] At present, in fracturing process technical field, in order to reduce energy emission pollution, usually use electric energy as power source, and motor drives the operation of fracturing equipment. As the main component of driving motor, the function of frequency converter is to convert the AC power supply on site into AC power supply with controllable voltage and frequency, drive motor to rotate, and can adjust the speed of motor.

[0003] However, the existing frequency converter equipment is often assembled and connected with single individual parts, which will lead to long assembly time, and due to the excessive number of parts of frequency converter, assembly is often complex, and even prone to assembly error. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a kind of power unit and the frequency converter with it, to solve the technical problem of the assembly mode of power unit in prior art is more complex.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a kind of power unit is provided, comprising:

[0006] Inverter module, rectifier module, first capacitor module and second capacitor module, the inverter module is arranged side by side with the first capacitor module, the rectifier module is arranged side by side with the second capacitor module;

[0007] First busbar, part of the first busbar is connected with the inverter module, another part of the first busbar is connected with the first capacitor module;

[0008] Second busbar, part of the second busbar is connected with the rectifier module, another part of the second busbar is connected with the second capacitor module.

[0009] Further, the inverter module includes first shell, first connecting row and first power component, the first shell is provided with first opening, the first power component is installed in the first shell, the first connecting row is connected with the first power component, first connecting portion of the first connecting row is arranged at the first opening, at least part of the first busbar is arranged at the first opening and is connected with the first connecting portion.

[0010] Further, the rectifier module comprises a second housing, a second connecting row and a second power component, the second housing is provided with a second opening, the second power component is installed in the second housing, the second connecting row is connected with the second power component, and the second connecting part of the second connecting row is arranged at the second opening, and at least part of the second busbar is arranged at the second opening and connected with the second connecting part.

[0011] Further, the inverter module, the rectifier module, the first capacitor module and the second capacitor module are all in a box structure, and the first capacitor module and the second capacitor module are respectively located below the inverter module and the rectifier module.

[0012] Further, the inverter module is a plurality of inverter modules, the plurality of inverter modules are arranged in a first preset direction at intervals, the first capacitor module is a plurality of first capacitor modules, the plurality of first capacitor modules are arranged in the first preset direction at intervals, the plurality of first capacitor modules and the plurality of inverter modules are arranged at intervals along a second preset direction, the plurality of first capacitor modules and the plurality of inverter modules are arranged in one-to-one correspondence, part of the first busbar is connected with the plurality of inverter modules, and another part of the first busbar is connected with the plurality of first capacitor modules.

[0013] Further, the first busbar is provided with a avoiding gap, and the avoiding gap is arranged to avoid the inverter outlet part of the inverter module; and / or,

[0014] The first busbar is provided with a first avoiding hole, and the first avoiding hole is arranged opposite to the first connecting part of the inverter module; and / or,

[0015] The first busbar is provided with a second avoiding hole, and the second avoiding hole is arranged opposite to the first access part of the first capacitor module.

[0016] Further, the second busbar is provided with a third avoiding hole, and the third avoiding hole is arranged opposite to the second connecting part of the rectifier module; and / or,

[0017] The second busbar is provided with a fourth avoiding hole, and the fourth avoiding hole is arranged opposite to the second access part of the second capacitor module.

[0018] Further, the power unit further comprises:

[0019] The support frame comprises a support frame, a first support plate and a second support plate arranged at intervals on the support frame, and the first support plate is arranged above the second support plate;

[0020] The first capacitor module and the second capacitor module are arranged on the second support plate in a spaced manner, and the inverter module and the rectifier module are arranged on the first support plate in a spaced manner.

[0021] The first support plate and / or the second support plate are provided with heat dissipation through holes.

[0022] Further, the power unit further comprises:

[0023] A connecting line connected with an inverter outlet of the inverter module;

[0024] A line support provided with a support hole matched with the connecting line, and the connecting line is arranged in the support hole.

[0025] According to another aspect of the present application, a frequency converter is provided, comprising the power unit provided above.

[0026] The technical scheme of the present application can realize the direct connection between the busbar and the corresponding module through the modular structure of the frequency converter, facilitate quick installation, avoid the case that too many parts of each module need to be assembled separately, and reduce the difficulty of assembly. At the same time, the modular design facilitates maintenance and upgrading, improves the reliability and flexibility of the equipment. In addition, the arrangement of the support frame and the line support enhances the stability of the structure, ensures the safety of power transmission, and the overall design is compact, has high space utilization, and is suitable for the fracturing process field. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings accompanying the specification of the present application form a part of the present application and serve to provide a further understanding of the present application, the illustrative embodiments of the present application and the explanations thereof serve to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0028] Fig. 1 A structural schematic view of a power unit provided according to an embodiment of the present application is shown;

[0029] Fig. 2 A partial structural schematic view of a power unit provided according to an embodiment of the present application is shown;

[0030] Fig. 3 A structural schematic view of an inverter module, a rectifier module, a first capacitor module and a second capacitor module placed on a support frame according to an embodiment of the present application is shown;

[0031] Fig. 4 A structural schematic view of a support frame according to an embodiment of the present application is shown.

[0032] Wherein, the above-mentioned drawings include the following reference signs:

[0033] 10, inverter module;

[0034] 11, first housing; 111, first opening;

[0035] 12, first connecting row; 121, first connecting part;

[0036] 13, first power component;

[0037] 14, inverter outlet part;

[0038] 20, rectifier module;

[0039] 21, second housing; 211, second opening;

[0040] 22, second connecting row; 221, second connecting part;

[0041] 23, second power component;

[0042] 30, first capacitor module; 31, first access part;

[0043] 40, second capacitor module; 41, second access part;

[0044] 50, first busbar;

[0045] 60, second busbar;

[0046] 70, intermediate connecting row;

[0047] 80, support frame; 81, support frame; 82, first support plate; 83, second support plate; 84, heat dissipation through hole;

[0048] 90, connecting line; 100, line support; 110, line fixing part. DETAILED DESCRIPTION

[0049] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0050] As Figs. 1 to 4As shown, one embodiment of the utility model provides a kind of power unit, the power unit includes inverter module 10, rectifier module 20, first capacitor module 30, second capacitor module 40 first busbar 50 and second busbar 60, inverter module 10 is arranged side by side with first capacitor module 30, rectifier module 20 is arranged side by side with second capacitor module 40.The part of first busbar 50 is connected with inverter module 10, another part of first busbar 50 is connected with first capacitor module 30, the part of second busbar 60 is connected with rectifier module 20, another part of second busbar 60 is connected with second capacitor module 40.

[0051] The modular design of the power unit provided in the embodiment can realize the quick connection of the inverter module 10 and the first capacitor module 30, the quick connection of the rectifier module 20 and the second capacitor module 40 through the connection operation of the first busbar 50 and the second busbar 60, thereby realizing the quick connection of the entire power unit without the need for separately assembling multiple components of each module and then connecting them, thereby reducing the assembly difficulty and complexity of the power unit. At the same time, the above-mentioned modular design can also facilitate maintenance and upgrading, and facilitate corresponding disassembly and assembly operations by workers. In addition, the above-mentioned side-by-side arrangement mode also facilitates connection through busbars, optimizes the compactness of the internal structure of the power unit, and facilitates the connection of the first busbar 50 and the second busbar 60.

[0052] Specifically, the first power component 13 and the second power component 23 can include IGBT, diode, capacitor, circuit board and other devices, and the first power component 13 and the second power component 23 function to switch under the control of the control system to realize the conduction and closing of current on the device to achieve the purpose of controlling output voltage and current.

[0053] In the embodiment, the inverter module 10 includes a first housing 11, a first connection row 12 and a first power component 13, the first housing 11 is provided with a first opening 111, the first power component 13 is installed in the first housing 11, the first connection row 12 is connected with the first power component 13, the first connection part 121 of the first connection row 12 is arranged at the first opening 111, and at least part of the first busbar 50 is arranged at the first opening 111 and connected with the first connection part 121. With such a structure, it is convenient to form an independent inverter module 10 structure, and it is also convenient to realize the connection mode of the first connection row of the inverter module 10 and the first busbar 50 in a laminated busbar manner, facilitating connection and assembly operations.

[0054] Specifically, the inverter module 10 further comprises a first heat dissipation member, which is arranged in the first housing 11, and the first power component 13 is mounted on the first heat dissipation member to dissipate heat through the first heat dissipation member. Specifically, the first heat dissipation member can be a cooling plate, and cooling liquid is introduced into the cooling plate to cool. The structural arrangement of the inverter module 10 not only ensures the tightness and reliability of the internal structure connection of the inverter module 10, but also facilitates heat dissipation of the inverter module 10, and is suitable for high-power and high-load frequency converters.

[0055] By arranging the first opening 111 on the first housing 11, the first busbar 50 is directly connected with the first connecting portion, which not only simplifies the internal wiring, but also improves the heat dissipation efficiency, and ensures the stability and service life of the module under high-power operating conditions.

[0056] In the embodiment, the rectifier module 20 comprises a second housing 21, a second connecting busbar 22 and a second power component 23, the second housing 21 is provided with a second opening 211, the second power component 23 is mounted in the second housing 21, the second connecting busbar 22 is connected with the second power component 23, the second connecting portion 221 of the second connecting busbar 22 is arranged at the second opening 211, and at least part of the second busbar 60 is arranged at the second opening 211 and connected with the second connecting portion 221. By adopting such a structural arrangement, it is convenient to form the structure of the independent rectifier module 20, and it is also convenient to realize the connection mode of the laminated busbar between the second connecting busbar 22 of the rectifier module 20 and the second busbar 60, and convenient for connection and assembly operation.

[0057] Specifically, the rectifier module 20 further comprises a first heat dissipation member, which is arranged in the second housing 21, and the second power component 23 is mounted on the second heat dissipation member to dissipate heat through the second heat dissipation member. Specifically, the second heat dissipation member can be a cooling plate, and cooling liquid is introduced into the cooling plate to cool. The structural arrangement of the rectifier module 20 not only ensures the tightness and reliability of the internal structure connection of the rectifier module 20, but also facilitates heat dissipation of the rectifier module 20, and is suitable for high-power and high-load frequency converters.

[0058] By arranging the second opening 211 on the second housing 21, the second busbar 60 is directly connected with the second connecting portion 221, which not only simplifies the internal wiring, but also improves the heat dissipation efficiency, and ensures the stability and service life of the module under high-power operating conditions.

[0059] In the embodiment, the power unit further comprises an intermediate connecting row 70, one end of the intermediate connecting row 70 is connected with the first busbar 50, and the other end of the intermediate connecting row 70 is connected with the second busbar 60. With such a structure, the connection of the first busbar 50 and the second busbar 60 can be facilitated, and the connection operation can be facilitated. In addition, the arrangement of the intermediate connecting row 70 simplifies the connection between the modules, and improves the compactness and stability of the overall structure.

[0060] Specifically, one end of the intermediate connecting row 70 is connected with the part of the first busbar 50 corresponding to the first capacitor module 30, and the other end of the intermediate connecting row 70 is connected with the part of the second busbar 60 corresponding to the second capacitor module 40. Such a connection mode ensures voltage stability during power conversion, improves the stability and safety of the system, and is suitable for occasions requiring stable voltage output, such as fracturing operation equipment.

[0061] In the embodiment, the plurality of inverter modules 10 are arranged in a first preset direction, the plurality of first capacitor modules 30 are arranged in the first preset direction, the plurality of first capacitor modules 30 are arranged in a second preset direction with the plurality of inverter modules 10, the plurality of first capacitor modules 30 and the plurality of inverter modules 10 are arranged one by one, a part of the first busbar 50 is connected with the plurality of inverter modules 10, and the other part of the first busbar 50 is connected with the plurality of first capacitor modules 30. With such a structure, the structure layout of the plurality of inverter modules 10 and the plurality of first capacitor modules 30 can be optimized, the compactness of the structure layout of the power unit can be optimized, and the plurality of first capacitor modules 30 and the plurality of inverter modules 10 can be connected through the first busbar 50. In addition, the above structure layout can facilitate subsequent maintenance and maintenance operations of the staff.

[0062] Specifically, the first busbar 50 is provided with a relief gap, and the relief gap is arranged to avoid the inverter outlet part 14 of the inverter module 10. With such a structure, the inverter outlet part 14 can be connected with the external connecting line 90, thereby facilitating power supply to external electrical devices and facilitating connection operation.

[0063] In the embodiment, the first busbar 50 is provided with a first relief hole, and the first relief hole is arranged opposite to the first connecting part of the inverter module 10. With such a structure, the first connecting part of the inverter module 10 can be connected with the external line, and the operation can be facilitated.

[0064] Specifically, the first busbar 50 is provided with a second relief hole, and the second relief hole is arranged opposite to the first access part 31 of the first capacitor module 30. With such a structure, the first access part 31 of the first capacitor module 30 can be connected with the external line, and the operation can be facilitated.

[0065] Specifically, the second busbar 60 is provided with a third avoiding hole, and the third avoiding hole is arranged opposite to the second connecting part 221 of the rectifier module 20. By adopting the structure, the second connecting part 221 of the rectifier module 20 can be conveniently connected with external lines, and the operation is facilitated.

[0066] Specifically, the second busbar 60 is provided with a fourth avoiding hole, and the fourth avoiding hole is arranged opposite to the second connecting part 221 of the rectifier module 20. By adopting the structure, the second connecting part 221 of the rectifier module 20 can be conveniently connected with external lines, and the operation is facilitated.

[0067] In the embodiment, the power unit further comprises a support frame 80, and the support frame 80 comprises a support frame 81, and a first support plate 82 and a second support plate 83 which are arranged on the support frame 81 in a spaced manner, and the first support plate 82 is arranged above the second support plate 83. The first capacitor module 30 and the second capacitor module 40 are arranged on the second support plate 83 in a spaced manner, and the inverter module 10 and the rectifier module 20 are arranged on the first support plate 82 in a spaced manner. By adopting the structure, the structural layout of the inverter module 10, the rectifier module 20, the first capacitor module 30 and the second capacitor module 40 can be optimized, the overall frame structure can be formed, and the installation and operation are facilitated.

[0068] Specifically, the first support plate 82 and / or the second support plate 83 are provided with heat dissipation through holes 84, so as to facilitate heat dissipation of the inverter module 10 or the rectifier module 20.

[0069] Specifically, the inverter module 10, the rectifier module 20, the first capacitor module 30 and the second capacitor module 40 can be fixedly connected with the support frame 80, so as to improve the structural stability of the overall power unit, facilitate adjustment and installation of the position of the support frame 80 according to actual needs, and improve the structural stability and reliability of the equipment.

[0070] Specifically, the inverter module 10, the rectifier module 20, the first capacitor module 30 and the second capacitor module 40 are designed as a box type structure, so as to facilitate installation thereof on the support frame 80.

[0071] The first capacitor module 30 and the second capacitor module 40 are respectively arranged below the inverter module 10 and the rectifier module 20, and such arrangement can facilitate connection of the first busbar 50 and the second busbar 60, and facilitate installation.

[0072] In addition, the arrangement of the support frame 80 enhances the structural stability and heat dissipation performance of the system. The design of the support frame 80 not only provides a stable support structure, but also facilitates heat dissipation of the system. Good heat dissipation performance can prevent the equipment from overheating, and at the same time, the enhanced structural stability and heat dissipation performance of the support frame 80 can ensure long-term stable operation of the power unit, improve the reliability and production efficiency of the equipment.

[0073] In the embodiment, the power unit further comprises a connecting line 90 connected with the inverter outlet 14 of the inverter module 10 and a line support 100. The line support 100 has a support hole matched with the connecting line 90, and the connecting line 90 is arranged in the support hole. With such a structure, the safety and reliability of the transmission of the connecting line can be ensured, and the stability of the connecting line 90 and the protection of the line support 100 can effectively avoid risks such as line damage and power interruption, ensuring the normal operation of the power unit. At the same time, the design of the support hole of the line support 100 can also adapt to connecting lines 90 of different shapes and sizes, improving the design flexibility and compatibility of the system.

[0074] Specifically, the power unit further comprises a line fixing member 110, and the line fixing member 110 is provided with a wire hole.

[0075] Another embodiment of the utility model provides a frequency converter, the frequency converter includes the power unit provided above. With such a structure, the skid-mounted frequency converter structure is facilitated, the internal structure layout of the frequency converter is optimized, and the compactness of the structure layout of the frequency converter is improved.

[0076] From the above description, it can be seen that the embodiments of the utility model realize the following technical effects: the power unit adopts a modular structure, which facilitates the connection and installation of the power unit, simplifies the installation operation, and facilitates maintenance and replacement.

[0077] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0078] The foregoing is considered as illustrative only of the principles of the application. Other variations and modifications are possible in light of the above teachings. Therefore, the scope of the application is not intended to be limited to the particular embodiments described herein but is to be accorded the broadest scope consistent with the principles and the scope of the appended claims and equivalents thereof. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an overly literal sense unless expressly so defined herein.

[0079] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0080] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0081] In addition, it should be noted that the use of the words "first", "second" and the like to define various components is merely intended to distinguish the corresponding components from each other, and the words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0082] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power unit, characterized by The application relates to a power supply device, comprising: an inverter module (10), a rectifier module (20), a first capacitor module (30) and a second capacitor module (40), wherein the inverter module (10) is arranged side by side with the first capacitor module (30), and the rectifier module (20) is arranged side by side with the second capacitor module (40); a first busbar (50), one part of the first busbar (50) being connected with the inverter module (10), and the other part of the first busbar (50) being connected with the first capacitor module (30); and a second busbar (60), one part of the second busbar (60) being connected with the rectifier module (20), and the other part of the second busbar (60) being connected with the second capacitor module (40). The inverter module (10) comprises a first shell (11), a first connecting busbar (12) and a first power component (13), the first shell (11) is provided with a first opening (111), the first power component (13) is arranged in the first shell (11), the first connecting busbar (12) is connected with the first power component (13), a first connecting part (121) of the first connecting busbar (12) is arranged at the first opening (111), and at least part of the first busbar (50) is arranged at the first opening (111) and connected with the first connecting part (121). The rectifier module (20) comprises a second shell (21), a second connecting busbar (22) and a second power component (23), the second shell (21) is provided with a second opening (211), the second power component (23) is arranged in the second shell (21), the second connecting busbar (22) is connected with the second power component (23), a second connecting part (221) of the second connecting busbar (22) is arranged at the second opening (211), and at least part of the second busbar (60) is arranged at the second opening (211) and connected with the second connecting part (221). The inverter module (10), the rectifier module (20), the first capacitor module (30) and the second capacitor module (40) are all box structures.

2. The power unit of claim 1, wherein, The first capacitor module (30) and the second capacitor module (40) are respectively arranged below the inverter module (10) and the rectifier module (20).

3. The power unit of claim 1, wherein, The inverter module (10) is multiple, multiple inverter modules (10) are arranged in a first preset direction at intervals, the first capacitor module (30) is multiple, multiple first capacitor modules (30) are arranged in the first preset direction at intervals, multiple first capacitor modules (30) and multiple inverter modules (10) are arranged at intervals along a second preset direction, multiple first capacitor modules (30) and multiple inverter modules (10) are arranged in one-to-one correspondence, one part of the first busbar (50) is connected with multiple inverter modules (10), and the other part of the first busbar (50) is connected with multiple first capacitor modules (30).

4. The power unit of claim 1, wherein, ​ ​ 5. The power unit of claim 1, wherein, ​ 6. The power unit of claim 1, wherein, The first busbar (50) is provided with an avoiding gap, which is arranged to avoid the inverter outlet (14) of the inverter module (10); and / or, The first busbar (50) is provided with a first avoiding hole, which is arranged opposite to the first connecting part (121) of the inverter module (10); and / or, The first busbar (50) is provided with a second avoiding hole, which is arranged opposite to the first connecting part (121) of the inverter module (10); and / or, 7. The power unit of claim 1, wherein, The second busbar (60) is provided with a third avoiding hole, which is arranged opposite to the second connecting part (221) of the rectifier module (20); and / or, The second busbar (60) is provided with a fourth avoiding hole, which is arranged opposite to the second connecting part (221) of the rectifier module (20).

8. The power unit of claim 1, wherein, The power unit further comprises: a support frame (80) comprising a support frame (81), a first support plate (82) and a second support plate (83) which are arranged on the support frame (81) in a spaced manner, and the first support plate (82) is arranged above the second support plate (83); wherein the first capacitor module (30) and the second capacitor module (40) are arranged on the second support plate (83) in a spaced manner, and the inverter module (10) and the rectifier module (20) are arranged on the first support plate (82) in a spaced manner; and / or, the first support plate (82) and / or the second support plate (83) are provided with heat dissipation through holes (84).

9. The power unit of claim 1, wherein, The power unit further comprises: a connecting line (90), which is connected with the inverter outlet of the inverter module (10); a line support (100) having a support hole which is matched with the connecting line (90), and the connecting line (90) is arranged in the support hole.

10. A frequency converter, characterized in that The power unit according to any one of claims 1 to 9. The power unit according to any one of claims 1 to 9.

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