Converter and frequency conversion equipment

Abstract

The utility model discloses a current converter and frequency conversion equipment, and relates to the technical field of frequency conversion equipment. The power module is arranged in the mounting frame; the cover plate is rotationally connected with the mounting frame, the cover plate at least comprises a daughter board and a mother board, the mother board covers the mounting frame and is rotationally connected with the mounting frame, the daughter board is arranged on the side, opposite to the mounting frame, of the mother board, and the daughter board is rotationally connected with the mother board; the circuit board comprises a first circuit board and a second circuit board which are electrically connected, the first circuit board is arranged on the mother board, and the second circuit board is arranged on the daughter board. According to the technical scheme of the utility model, the technical problem that the existing converter is inconvenient to maintain is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency conversion equipment, in particular to a converter and frequency conversion equipment. Background Art

[0002] With the rapid development of industrial automation, new energy, electric vehicles and other fields, the market demand for inverters, as key equipment for power conversion, is growing. The device layout of existing inverters is: the bottom layer is the heat sink and the power module arranged on the heat sink, and the top layer is the circuit board assembly that is conductively connected to the power module. However, when the inverter explodes or has other faults, the circuit board assembly installed on the top layer needs to be disassembled before the power module on the bottom layer can be maintained, which makes it inconvenient to disassemble and assemble the power module, which is not conducive to the maintenance of the inverter. Utility Model Content

[0003] The main purpose of the utility model is to provide a converter and a frequency conversion device, aiming to solve the technical problem that the existing converter is inconvenient to maintain.

[0004] To achieve the above object, an embodiment of the utility model provides a converter, the converter comprising:

[0005] Mounting frame;

[0006] A power module is arranged in the installation frame;

[0007] a cover plate, rotatably connected to the installation frame, the cover plate at least comprising a sub-board and a motherboard, the motherboard is covered on the installation frame and rotatably connected to the installation frame, the sub-board is arranged on a side of the motherboard facing away from the installation frame, and the sub-board is rotatably connected to the motherboard; and

[0008] The circuit board comprises a first circuit board and a second circuit board which are electrically connected, wherein the first circuit board is arranged on the motherboard and the second circuit board is arranged on the daughterboard.

[0009] In one embodiment, the cover plate further includes a first hinge, and the motherboard is rotatably connected to the mounting frame via the first hinge; and / or, the cover plate further includes a second hinge, and the sub-board is rotatably connected to the motherboard via the second hinge.

[0010] In one embodiment, the cover plate further includes a first support rod, which connects the motherboard and the mounting frame to fix the motherboard in an open state; and / or, the cover plate further includes a second support rod, which connects the daughter board and the motherboard to fix the daughter board in an open state.

[0011] In one embodiment, the inverter further includes an energy storage unit, which is disposed outside the installation frame and is electrically connected to the power module.

[0012] In one embodiment, the inverter further includes a connection bar, and the power module and the energy storage unit are electrically connected via the connection bar.

[0013] In one embodiment, the inverter further includes a heat dissipation component, which is connected to a side of the installation frame facing away from the cover plate and is arranged corresponding to the power module.

[0014] In one embodiment, the heat dissipation assembly includes a liquid cooling plate, and the power devices of the power module are attached to the liquid cooling plate.

[0015] In one embodiment, the heat dissipation assembly and the mounting frame are detachably connected.

[0016] In one embodiment, the motherboard and / or the daughterboard is provided with a through hole.

[0017] In one embodiment, the inverter further includes a shell, and the mounting frame and the energy storage unit are arranged inside the shell.

[0018] To achieve the above objective, an embodiment of the present utility model provides a frequency conversion device, which includes the inverter described above.

[0019] The technical solution of the present application, by setting a cover plate that is rotatably connected to the installation frame, only needs to rotate the cover plate to expose the power module inside the installation frame, without disassembling other components, thereby improving the convenience of power module maintenance. Moreover, the cover plate in the present application includes a sub-board and a motherboard that are rotatably connected, a second circuit board such as a control board and a power supply mainboard is arranged on the sub-board, and a first circuit board such as a drive board and a power supply board is arranged on the motherboard, so that the first circuit board and the second circuit board are arranged in a superimposed direction of the sub-board and the motherboard, and can be arranged closer, which can reduce the length of the connection between the circuit boards, and the driving effect is better, which is conducive to improving the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of an inverter embodiment of the utility model from one angle;

[0022] Figure 2 Schematic three-dimensional structure diagram of an embodiment of the converter of the present utility model;

[0023] Figure 3 Schematic structure diagram of another angle of an embodiment of the converter of the present utility model.

[0024] Explanation of the reference numerals in the drawings:

[0025] 10. Installation frame; 20. Power module; 30. Cover plate; 31. Mother board; 32. Daughter board; 41. Second circuit board; 42. First circuit board; 50. Energy storage unit; 61. First hinge; 62. Second hinge; 71. First support rod; 72. Second support rod; 80. Connection row; 90. Heat dissipation component.

[0026] The realization, functional features and advantages of the object of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the embodiments of the present utility model.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, the descriptions such as "first" and "second" in the embodiments of the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In the embodiments of the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present utility model.

[0032] The device layout of the existing converter is as follows: the bottom layer is the radiator and the power modules arranged on the radiator, and the top layer is the circuit board assembly electrically connected to the power modules. However, when a fault such as a converter explosion occurs, it is necessary to first disassemble the circuit board assembly installed on the top layer in order to maintain the power modules at the bottom layer, resulting in inconvenient disassembly and assembly of the power modules and being unfavorable for the maintenance of the converter.

[0033] In view of this, the embodiments of the present utility model provide a converter and a frequency conversion device. By arranging the energy storage unit outside the installation frame, only the cover plate needs to be opened to disassemble and assemble the internal power modules, without disassembling heavy energy storage units such as capacitor assemblies, thereby improving the convenience of maintenance. At the same time, by externalizing the energy storage units such as capacitor assemblies, the design of the explosion-proof shell can be adapted, and the production and assembly are more convenient. Moreover, the cover plate in the present application includes a sub-plate and a mother-plate connected by rotation. The control board and the power main board are arranged on the sub-plate, and the drive board and the power board are arranged on the opposite side surfaces of the mother-plate, so that the drive board and the control board are arranged in an overlapping manner in the stacking direction of the sub-plate and the mother-plate. The drive board and the control board are arranged closer, which can reduce the connection length between the circuit boards, has a better driving effect, and is beneficial to improving the stability of the system.

[0034] In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the accompanying drawings.

[0035] As Figure 1 shown, the embodiments of the present utility model propose a converter, which includes:

[0036] An installation frame 10;

[0037] A power module 20, which is arranged in the installation frame 10. In one embodiment, the power module 20 includes a gate plate and power devices arranged on the gate plate;

[0038] A cover plate 30 is rotatably connected to the mounting frame 10. The cover plate 30 at least includes a sub-plate 32 and a mother plate 31. The mother plate 31 covers the mounting frame 10 and is rotatably connected to the mounting frame 10. The sub-plate 32 is disposed on the side of the mother plate 31 facing away from the mounting frame 10, and the sub-plate 32 and the mother plate 31 are rotatably connected.

[0039] A circuit board, which includes a first circuit board 42 and a second circuit board 41 that are electrically connected. The first circuit board 42 includes a power supply board and a driving board, and the second circuit board 41 includes a control board and a main power supply board. The second circuit board 41 is disposed on the sub-plate 32, and the first circuit board 42 is disposed on the mother plate 31.

[0040] In the technical solution adopted in this embodiment, by providing the cover plate 30 rotatably connected to the mounting frame 10, only by rotating the cover plate 30 can the power module 20 inside the mounting frame 10 be exposed, without disassembling other components, improving the convenience of maintaining the power module 20. Moreover, the cover plate 30 in this application includes a sub-plate 32 and a mother plate 31 that are rotatably connected. The second circuit board 41 such as the control board and the main power supply board is disposed on the sub-plate 32, and the first circuit board 42 such as the driving board and the power supply board is disposed on the mother plate 31, so that the first circuit board 42 and the second circuit board 41 are stacked in the stacking direction of the sub-plate 32 and the mother plate 31, can be placed closer, can reduce the connection wire length between the circuit boards, has a better driving effect, and is beneficial to improving the stability of the system.

[0041] Specifically, an installation cavity is formed inside the mounting frame 10, and an opening communicating with the installation cavity is provided. The power module 20 can be assembled into the installation cavity through the opening. The cover plate 30 is rotatably disposed at the opening. By rotating, the opening can be opened to facilitate the disassembly and assembly of the power module 20, or the opening can be closed to realize the enclosure of the installation cavity. The cover plate 30 includes a sub-plate 32 and a mother plate 31, and the sub-plate 32 and the mother plate 31 are rotatably connected. It can be understood that the mother plate 31 is close to the installation cavity, and the sub-plate 32 is rotatably disposed on the side of the mother plate 31 facing away from the installation cavity. That is to say, the sub-plate 32 and the mother plate 31 can rotate relative to the mounting frame 10 respectively. The second circuit board 41 is disposed on the sub-plate 32, and the first circuit board 42 is disposed on the mother plate 31. In this way, the space of the sub-plate 32 and the mother plate 31 can be fully utilized to realize the installation of each circuit board, reducing the overall volume of the product. Moreover, the first circuit board 42 and the second circuit board 41 are closer, which is more convenient for wiring, and the connection lines are also shortened, which can improve the driving effect and system stability.

[0042] In an embodiment of the present utility model, the cover plate 30 further includes a first hinge 61. The motherboard 31 is rotatably connected to the installation frame 10 through the first hinge 61. In this way, the user can easily open and close the motherboard 31 by rotating the first hinge 61, improving the convenience of operation. The motherboard 31 has good stability during the opening and closing process; and / or, the cover plate 30 further includes a second hinge 62. The daughter board 32 is rotatably connected to the motherboard 31 through the second hinge 62. In this way, the user can easily rotate the daughter board 32 relative to the motherboard 31 by rotating the second hinge 62, improving the convenience of operation. The daughter board 32 has good stability during the opening and closing process.

[0043] In an embodiment of the present utility model, the cover plate 30 further includes a first support rod 71. The first support rod 71 connects the motherboard 31 and the installation frame 10 to fix the motherboard 31 in the open state. In this way, after the motherboard 31 is opened to a predetermined angle, the motherboard 31 is fixed at the predetermined angle by the first support rod 71, replacing manual support and further improving the convenience of operation. Optionally, one end of the first support rod 71 is rotatably connected to the installation frame 10, and the other end of the first support rod 71 is detachably connected to the motherboard 31, such as bolt connection, snap connection, magnetic attraction, etc. In one embodiment, a first groove is provided on the installation frame 10, and the first support rod 71 can be rotatably received in the first groove, so as to reduce space occupation; and / or, the cover plate 30 further includes a second support rod 72. The second support rod 72 connects the daughter board 32 and the motherboard 31 to fix the daughter board 32 in the open state. In this way, after the daughter board 32 is opened to a predetermined angle, the daughter board 32 is fixed at the predetermined angle by the second support rod 72, replacing manual support and further improving the convenience of operation. Optionally, one end of the second support rod 72 is rotatably connected to the motherboard 31, and the other end of the second support rod 72 is detachably connected to the daughter board 32, such as bolt connection, snap connection, magnetic attraction, etc. In one embodiment, a second groove is provided on the motherboard 31, and the second support rod 72 can be rotatably received in the second groove, so as to reduce space occupation.

[0044] In an embodiment of the present utility model, the converter further includes an energy storage unit 50, which is arranged outside the installation frame 10, and the energy storage unit 50 is electrically connected to the power module 20. The energy storage unit 50 is arranged outside the installation frame 10. When disassembling and assembling the power module 20, it can avoid disassembling the heavy energy storage unit 50, improving the convenience of operation. At the same time, by placing the energy storage unit 50 outside, it can adapt to the design of the explosion-proof shell, making production and assembly more convenient. In one embodiment, the energy storage unit 50 is a capacitor component.

[0045] In one embodiment of the utility model, the converter further includes a connection bar 80, and the power module 20 and the energy storage unit 50 are electrically connected via the connection bar 80. In order to facilitate the electrical connection between the energy storage unit 50 and the power module 20, the connection bar 80 is provided, and the reliability and stability of the electrical connection between the energy storage unit 50 and the power module 20 can be improved by the connection bar 80. Optionally, the connection bar 80 is a copper bar, which has a high electrical conductivity, can efficiently transmit electrical energy, and reduce energy loss; it can also quickly dissipate heat, which helps to keep the temperature of the electrical connection stable.

[0046] In one embodiment of the utility model, the inverter further includes a heat dissipation assembly 90, which is connected to the side of the mounting frame 10 away from the cover plate 30 and is arranged corresponding to the power module 20. The power module 20 generates heat during operation, and the temperature rise is relatively large. For this reason, a heat dissipation assembly 90 is provided, through which the power module 20 can be timely cooled to slow down the temperature rise. In one embodiment, the heat dissipation assembly 90 can be a heat dissipation fan, which can accelerate the air flow and take away the surface heat of the power module 20.

[0047] In one embodiment of the utility model, the heat dissipation assembly 90 includes a liquid cooling plate, and the power devices of the power module 20 are attached to the liquid cooling plate. Specifically, a cooling channel is provided in the liquid cooling plate, and the coolant flows in the cooling channel. The coolant can exchange heat with the power devices of the power module 20, absorb the heat on the surface of the power module 20, and thus achieve heat dissipation and cooling of the power module 20. Moreover, the liquid has a higher heat capacity and can absorb more heat with less temperature rise. At the same time, the liquid can evenly distribute heat during the flow process, which can reduce hot spots and improve the uniformity of heat dissipation of the power module 20.

[0048] In an embodiment of the utility model, the heat dissipation assembly 90 and the mounting frame 10 are detachably connected. In this way, the heat dissipation assembly 90 can be replaced or upgraded according to customer needs, which increases the flexibility of use of the device. At the same time, when the mounting frame 10 or the heat dissipation assembly 90 is damaged, the damaged component can be replaced alone instead of the entire device, thereby saving costs. In one embodiment, the heat dissipation assembly 90 can be detachably connected to the mounting frame 10 by snap connection, screw connection, etc.

[0049] In one embodiment of the present invention, through holes are provided on the motherboard 31 and / or the daughterboard 32. In this way, it is convenient for connecting cables to pass through, and air circulation with the installation cavity can be achieved, thereby improving the heat dissipation effect of the power module 20.

[0050] In an embodiment of the utility model, the inverter further comprises a housing, and the mounting frame 10 and the energy storage unit 50 are arranged inside the housing. The housing can protect the energy storage unit 50, etc., reduce the probability of risk of explosion, and improve the safety of equipment use.

[0051] In an embodiment of the present utility model, the above converter may be a commutation device such as a frequency converter, a rectifier, an inverter or a DC converter.

[0052] To achieve the above object, an embodiment of the present utility model provides a frequency conversion device, which includes the converter described above. Specifically, for the specific structure of the converter, reference may be made to the above embodiment. Since this frequency conversion device adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated herein one by one.

[0053] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the embodiments of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the embodiments of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the embodiments of the present utility model.

Claims

1. A converter, characterized in that: The converter comprises: Mounting frame; A power module is arranged in the installation frame; a cover plate, rotatably connected to the installation frame, the cover plate at least comprising a sub-board and a motherboard, the motherboard is covered on the installation frame and rotatably connected to the installation frame, the sub-board is arranged on a side of the motherboard facing away from the installation frame, and the sub-board is rotatably connected to the motherboard; and The circuit board comprises a first circuit board and a second circuit board which are electrically connected, wherein the first circuit board is arranged on the motherboard and the second circuit board is arranged on the daughterboard.

2. The inverter according to claim 1, characterized in that: The cover plate further includes a first hinge, and the motherboard is rotatably connected to the installation frame via the first hinge; and / or, the cover plate further includes a second hinge, and the sub-board is rotatably connected to the motherboard via the second hinge.

3. The inverter according to claim 1, characterized in that: The cover plate further includes a first support rod, which connects the motherboard and the mounting frame to fix the motherboard in an open state; and / or, the cover plate further includes a second support rod, which connects the daughter board and the motherboard to fix the daughter board in an open state.

4. The inverter according to claim 1, characterized in that: The inverter further includes an energy storage unit, which is disposed outside the installation frame and is electrically connected to the power module.

5. The inverter according to claim 4, characterized in that: The converter further includes a connection bar, and the power module and the energy storage unit are electrically connected via the connection bar.

6. The inverter according to claim 1, characterized in that: The inverter further includes a heat dissipation component, which is connected to a side of the installation frame away from the cover plate and is arranged corresponding to the power module.

7. The inverter according to claim 6, characterized in that: The heat dissipation assembly includes a liquid cooling plate, and the power devices of the power module are attached to the liquid cooling plate.

8. The inverter according to claim 7, characterized in that: The heat dissipation assembly and the installation frame are detachably connected.

9. The inverter according to any one of claims 1 to 8, characterized in that: The motherboard and / or the daughterboard are provided with through holes.

10. A frequency conversion device, characterized in that: The frequency conversion device comprises the inverter according to any one of claims 1 to 9.

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