Inverter

Abstract

The utility model discloses an inverter. The inverter comprises a box body and a circuit board assembly. The box body is provided with a first cavity; the circuit board assembly is arranged in the first cavity, the circuit board assembly comprises a control main board, a DC filter board, an AC filter board, a common mode inductor, a power board assembly, an ARM board and an inversion inductor assembly, the control main board comprises a power board and an output board which are arranged in a stacked mode, and the control main board is sequentially provided with a first side, a second side and a third side along the periphery; the inverter inductance assembly is arranged on the first side and electrically connected with the power board and the output board, the power board assembly is arranged on the second side and electrically connected with the output board, the ARM board is arranged between the power board assembly and the AC filter board and electrically connected with the output board, the DC filter board and the AC filter board are sequentially arranged on the third side, the DC filter board is electrically connected with the power board, and the AC filter board is electrically connected with the output board. The AC filter board is electrically connected with the output board through a common mode inductor. According to the invention, the problem of unreasonable layout of internal components of the inverter in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of inverters, and more particularly, to an inverter. Background Art

[0002] At present, the layout of the internal components of an inverter is generally based on the specification standards in traditional designs, without fully considering the spatial coupling relationship between components. The layout between components is unreasonable, resulting in waste of space in some internal areas, a relatively large overall volume of the inverter, and increased difficulty in wiring between internal components, further increasing the manufacturing cost of the inverter. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide an inverter to at least solve the problem of high manufacturing cost of existing inverters caused by unreasonable layout of internal components.

[0004] According to one aspect of the utility model, an inverter is provided, including:

[0005] A box body provided with a first cavity;

[0006] A circuit board assembly disposed in the first cavity. The circuit board assembly includes a control main board, a DC filter board, an AC filter board, a common mode inductor, a power supply board assembly, an ARM board, and an inverter inductor assembly. The control main board includes a power board and an output board stacked. The control main board is sequentially provided with a first side, a second side, and a third side along the outer periphery. The inverter inductor assembly is disposed on the first side of the control main board and is electrically connected to the power board and the output board respectively. The power supply board assembly is disposed on the second side of the control main board and is electrically connected to the output board. The ARM board is disposed between the power supply board assembly and the AC filter board and is electrically connected to the output board. The DC filter board and the AC filter board are sequentially disposed on the third side of the control main board. The DC filter board is electrically connected to the power board. The AC filter board is electrically connected to the output board through the common mode inductor. The common mode inductor is disposed between the AC filter board and the output board.

[0007] Further, the power supply board assembly includes a DC power supply board and an AC power supply board. The DC power supply board and the AC power supply board are sequentially disposed along the extension direction of the second side of the control main board. The DC power supply board and the AC power supply board are respectively electrically connected to the output board.

[0008] Further, the inverter inductor assembly includes three inverter inductors. The three inverter inductors are sequentially disposed along the extension direction of the first side of the control main board. The three inverter inductors are respectively electrically connected to the power board and the output board.

[0009] Further, an input terminal assembly is provided on a side of the DC filter board away from the control main board. The input terminal assembly includes two DC input terminals respectively electrically connected to the DC filter board. An output terminal assembly is provided on a side of the AC filter board away from the control main board. The output terminal assembly includes four AC output terminals respectively electrically connected to the AC filter board.

[0010] Further, a first magnetic ring is provided between the DC filter board and the input terminal assembly, and a second magnetic ring is provided between the AC filter board and the output terminal assembly.

[0011] Further, a copper bar is provided between the DC filter board and the power board, and the DC filter board and the power board are electrically connected through the copper bar.

[0012] Further, the control main board further includes a fourth side. Among them, the first side, the second side, the third side, and the fourth side of the control main board are sequentially arranged along the outer periphery of the control main board. The circuit board assembly further includes a fan assembly. The fan assembly includes four fans. Among them, the first fan is provided on the first side of the control main board, the second fan is provided on the third side of the control main board, the third and fourth fans are provided on the fourth side of the control main board, and the four fans are respectively electrically connected to the output board.

[0013] Further, the circuit board assembly further includes an SVG board. The SVG board is provided on the second side of the control main board and is electrically connected to the power board.

[0014] Further, the circuit board assembly further includes an indicator board. The indicator board is provided between the ARM board and the control main board, and the indicator board is electrically connected to the ARM board.

[0015] Further, the box body is further provided with a second cavity. The second cavity is provided with a heat dissipation component. An installation plate is provided between the second cavity and the first cavity. The installation plate is provided with installation holes for inserting the common mode inductor and the inverter inductor assembly.

[0016] In the present utility model, by optimizing the layout of the circuit board assembly in the inverter, various components such as the control main board, the inverter inductor assembly, the power supply board assembly, etc. are reasonably distributed according to functional areas, and the heat dissipation areas are separated by the installation plate, effectively solving the problem of high manufacturing cost caused by the unreasonable layout of the internal components of the existing inverter. It not only improves the heat dissipation efficiency, but also enhances the stability of each component inside the inverter, reduces electromagnetic interference at the same time, improves the overall performance of the inverter, and realizes the dual improvement of cost - effectiveness and performance optimization. Description of the Drawings

[0017] The accompanying drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 It is a structural diagram of the circuit board assembly of the inverter disclosed in the embodiment of the present utility model from the first perspective;

[0019] Figure 2 It is a structural diagram of the circuit board assembly of the inverter disclosed in the embodiment of the present utility model from the second perspective;

[0020] Figure 3 It is an exploded view of the inverter disclosed in the embodiment of the present utility model.

[0021] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0022] 10. Cabinet; 11. First cavity; 12. Second cavity; 1210. Mounting plate; 1211. Mounting hole; 20. Circuit board assembly; 21. Control main board; 211. Power board; 212. Output board; 2131. First side; 2132. Second side; 2133. Third side; 2134. Fourth side; 22. DC filter board; 220. Pre-charge board; 221. First fuse; 2201. Input terminal assembly; 2202. First magnetic ring; 2203. Copper bar; 23. AC filter board; 231. Second fuse; 2301. Output terminal assembly; 2302. Second magnetic ring; 24. Common mode inductor; 25. Power supply board assembly; 251. DC power supply board; 252. AC power supply board; 26. ARM board; 27. Inverter inductor assembly; 28. Fan assembly; 29. SVG board; 210. Indicator light board; 30. Heat dissipation assembly. Detailed implementation manners

[0023] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present utility model. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0025] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings. The layout of the internal components of the inverter is generally based on the specification standards in the traditional design, without fully considering the spatial coupling relationship between the components. The layout between the components is unreasonable, resulting in waste of space in some internal areas, the overall volume of the inverter is relatively large, and it increases the difficulty of wiring between the internal components, further increasing the manufacturing cost of the inverter.

[0026] As introduced in the background art, the internal components of the existing inverter do not fully consider the spatial coupling relationship between the components, resulting in an unreasonable layout between the components, the relatively large volume of the inverter, increasing the difficulty of wiring between the components, and increasing the manufacturing cost of the inverter. Therefore, the present application provides an inverter. By reasonably arranging other components around the control main board of the internal circuit board assembly of the inverter, the layout of the internal components of the inverter can be made more reasonable, reducing the wiring difficulty and the manufacturing cost of the inverter. The inverter of the present invention will be introduced and described in detail below with reference to the drawings.

[0027] See Figures 1 to 3As shown, according to an embodiment of the present application, an inverter is provided, which includes a box body 10 and a circuit board assembly 20. A first cavity 11 is arranged inside the box body 10; the circuit board assembly 20 is arranged in the first cavity 11. The circuit board assembly 20 includes a control main board 21, a DC filter board 22, an AC filter board 23, a common mode inductor 24, a power supply board assembly 25, an ARM board 26, and an inverter inductor assembly 27. The control main board 21 includes a power board 211 and an output board 212 arranged in a stacked manner. The control main board 21 is sequentially provided with an adjacent first side 2131, a second side 2132, and a third side 2133 along the outer periphery. The inverter inductor assembly 27 is arranged on the first side 2131 of the control main board 21 and is electrically connected to the power board 211 and the output board 212 respectively. The power supply board assembly 25 is arranged on the second side 2132 of the control main board 21 and is electrically connected to the output board 212. The ARM board 26 is arranged between the power supply board assembly 25 and the AC filter board 23 and is electrically connected to the output board 212. The DC filter board 22 and the AC filter board 23 are sequentially arranged on the third side 2133 of the control main board 21. The DC filter board 22 is electrically connected to the power board 211. The AC filter board 23 is electrically connected to the output board 212 through the common mode inductor 24. The common mode inductor 24 is arranged between the AC filter board 23 and the output board 212.

[0028] Specifically, in this embodiment, by reasonably arranging each component of the circuit board assembly 20 in the first cavity 11 of the box body 10, stacking the power board 211 and the output board 212 of the inverter to form the control main board 21, and arranging each component along the outer periphery of the larger control main board 21, the internal space of the inverter can be fully utilized, thereby realizing the compact design of the inverter and reducing the production cost of the inverter. In this embodiment, the DC filter board 22 is arranged upside down on the third side 2133 of the control main board 21. The DC filter board 22 can be more closely attached to the control main board 21, making the layout more compact and shielding certain electromagnetic interference.

[0029] Further, the power board assembly 25 of this embodiment includes a DC power board 251 and an AC power board 252. The DC power board 251 and the AC power board 252 are arranged in sequence along the extending direction of the second side 2132 of the control main board 21. The DC power board 251 and the AC power board 252 are respectively electrically connected to the output board 212. The DC power board 251 in this embodiment is used to provide a DC power supply to power the DC components inside the inverter, such as the cooling fan inside the inverter. The AC power board 252 is used to provide an AC power supply to power the AC components inside the inverter. A partition design is carried out between the DC power board 251 and the AC power board 252. The partition design reduces the mutual interference inside the inverter and improves the overall stability and reliability of the inverter. The DC power board 251 and the AC power board 252 are arranged in sequence along the extending direction of the second side 2132 of the control main board 21, so that the power board assembly 25 is reasonably arranged within a limited space, saving the internal space of the inverter and helping to improve the heat dissipation performance inside the inverter.

[0030] Further, the inverter inductor assembly 27 of this embodiment includes three inverter inductors. The three inverter inductors are arranged in sequence along the extending direction of the first side 2131 of the control main board 21. The three inverter inductors are respectively electrically connected to the power board 211 and the output board 212. By arranging the three inverter inductors in sequence along one side of the control main board 21, it is beneficial to reduce line crossing and interference and improve the overall stability and reliability of the inverter. By reasonably arranging the three inverter inductors, the power density of the inverter can be increased without increasing the volume of the inverter, enabling the inverter to output a larger power within a limited space.

[0031] Further, an input terminal assembly 2201 is provided on the side of the DC filter board 22 away from the control main board 21. The input terminal assembly 2201 includes two DC input terminals respectively electrically connected to the DC filter board 22. An output terminal assembly 2301 is provided on the side of the AC filter board 23 away from the control main board 21. The output terminal assembly 2301 includes four AC output terminals respectively electrically connected to the AC filter board 23.

[0032] In this embodiment, the side of the DC filter board 22 away from the control main board 21 is the outer side of the inverter housing 10. The input terminal assembly 2201 and the output terminal assembly 2301 both need to be set close to the outer side position of the housing 10 to facilitate connection with external devices. The two DC input terminals are connected to the DC plug-in connectors outside the housing 10. The two DC input terminals are respectively the positive pole BAT+ and the negative pole BAT- of the DC input. The four AC input terminals are connected to the AC plug-in connectors outside the housing 10. The four AC output terminals are respectively three AC output live wires L1, L2, L3 and the AC output neutral wire N.

[0033] Furthermore, a first magnetic ring 2202 is provided between the DC filter board 22 and the input terminal assembly 2201, and a second magnetic ring 2302 is provided between the AC filter board 23 and the output terminal assembly 2301. The first magnetic ring 2202 and the second magnetic ring 2302 provided in this embodiment are mainly used to suppress the high-frequency noise and electromagnetic interference of the inverter circuit. When the wire between the input terminal assembly 2201 and the DC filter board 22 passes through the first magnetic ring 2202 and the wire between the AC filter board 23 and the output terminal assembly 2301 passes through the second magnetic ring 2302, the electromagnetic interference from the power input end and the inverter output end can be respectively suppressed, protecting the internal circuit from external interference. At the same time, it also reduces the electromagnetic radiation of the device to the external environment, helps to maintain the purity of the signal, reduces signal distortion and noise, thereby improving the overall quality of the signal.

[0034] Furthermore, a copper busbar 2203 is provided between the DC filter board 22 and the power board 211, and the DC filter board 22 and the power board 211 are electrically connected through the copper busbar 2203. The copper busbar 2203 has low resistivity and high conductivity. Using the copper busbar 2203 as the connector between the DC filter board 22 and the power board 211 can ensure the efficient transmission of electric energy, reduce the heat loss caused by resistance, and improve the overall efficiency of the system. Compared with the traditional wire harness connection, the connection through the copper busbar 2203 reduces the connection points and reduces the risk of potential failures such as poor contact and looseness. At the same time, the firmness of the copper busbar 2203 also enhances the vibration resistance and shock resistance of the inverter, improving the overall mechanical stability and reliability.

[0035] Furthermore, the control main board 21 further includes a fourth side 2134. Among them, the first side 2131, the second side 2132, the third side 2133 and the fourth side 2134 of the control main board 21 are sequentially arranged along the outer periphery of the control main board 21. The circuit board assembly 20 further includes a fan assembly 28. The fan assembly 28 includes four fans. Among them, the first fan is arranged on the first side 2131 of the control main board 21, the second fan is arranged on the third side 2133 of the control main board 21, and the third and fourth fans are arranged on the fourth side 2134 of the control main board 21. The four fans are respectively electrically connected to the output board 212. The four fans sequentially arranged on the outer periphery of the control main board 21 in this embodiment can form an air flow path in the first cavity 11, increasing the air convection in the first cavity 11, being able to dissipate the heat generated by the components in the first cavity 11, reducing the temperature of the circuit board assembly 20, and extending the service life of each component. The four fans arranged on the first side 2131, the third side 2133 and the fourth side 2134 of the control main board 21 can effectively cover most areas of the circuit board assembly 20, achieving a more balanced heat dissipation effect.

[0036] Furthermore, the circuit board assembly 20 further includes an SVG board 29 (Static Var Generator), and the SVG board 29 is disposed on the second side 2132 of the control main board 21 and electrically connected to the power board 211. In this embodiment, the SVG board 29 is mainly used to dynamically adjust the reactive power output by the power board 211 to maintain the voltage stability of the inverter. The reactive power fluctuations in the inverter can be compensated in real time through the SVG board 29, reducing voltage fluctuations and flicker, improving the power quality of the inverter output, and ensuring the stable operation of the power equipment. Disposing the SVG board 29 on the second side 2132 of the control main board 21 and electrically connecting it to the power board 211 can reduce the cable connection and interference between different boards, improving the integration and aesthetics of the circuit board assembly 20.

[0037] Furthermore, the circuit board assembly 20 further includes an indicator board 210, and the indicator board 210 is disposed between the ARM board 26 and the control main board 21 and electrically connected to the ARM board 26. The indicator board 210 is an LED indicator board, which displays the working status of specific functional modules in the inverter. When a fault occurs, it can provide quick fault location, reducing the time for fault troubleshooting. Disposing the indicator board 210 between the ARM board 26 and the control main board 21 optimizes the overall layout of the circuit board assembly 20, helping to reduce cable clutter and interference. At the same time, since the indicator board 210 is directly electrically connected to the ARM board 26, it can reduce additional signal transmission paths and potential signal attenuation problems.

[0038] Furthermore, the circuit board assembly 20 further includes a pre-charge board 220 that limits the instantaneous impact of current when the inverter starts, enabling each component of the inverter to gradually reach the normal working state and avoiding the risk of component damage due to excessive current. The pre-charge board 220 can effectively control the voltage fluctuations during the startup process, ensuring a smooth transition of the voltage during the startup and switching of the inverter, thereby improving the stability of the inverter.

[0039] Furthermore, the box body 10 is further provided with a second cavity 12, and a heat dissipation component 30 is disposed in the second cavity 12. An installation plate 1210 is provided between the second cavity 12 and the first cavity 11, and mounting holes 1211 for inserting the common mode inductor 24 and the inverter inductor assembly 27 are provided on the installation plate 1210. The common mode inductor 24 and the inverter inductor assembly 27 in the first cavity 11 are inserted into the second cavity 12 through the mounting holes 1211 on the installation plate 1210, and the heat dissipation component 30 is placed in the second cavity 12. The heat generated by the common mode inductor 24 and the inverter inductor assembly 27 can be effectively exported and dissipated to the external environment, improving the overall heat dissipation efficiency of the inverter.

[0040] In this embodiment, the DC filter board 22 is further provided with a first fuse 221, and the AC filter board 23 is further provided with a second fuse 231. The first fuse 221 and the second fuse 231 can provide overload protection and short-circuit protection for the circuit board assembly 20 of the inverter, improving the safety of the inverter power supply.

[0041] For the sake of convenience in description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., can be used here to describe the spatial position relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0042] In addition, it should be noted that using terms such as "first" and "second" to limit components is only for the convenience of differentiating the corresponding components. Without further statement, the above terms have no special meanings, so they should not be construed as limiting the protection scope of the present utility model.

[0043] The above is only the preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An inverter, characterized in that: include: A box body (10), wherein the box body (10) is provided with a first cavity (11); A circuit board assembly (20), the circuit board assembly (20) being arranged in the first cavity (11), the circuit board assembly (20) comprising a control mainboard (21), a DC filter board (22), an AC filter board (23), a common mode inductor (24), a power board assembly (25), an ARM board (26) and an inverter inductor assembly (27), the control mainboard (21) comprising a power board (211) and an output board (212) arranged in a stacked manner, the control mainboard (21) being provided with a first side (2131), a second side (2132) and a third side (2133) in sequence along the outer periphery, the inverter inductor assembly (27) being arranged on the first side (2131) of the control mainboard (21) and being respectively connected to the power board (211), the output board (212 ), the power board component (25) is arranged on the second side (2132) of the control main board (21) and is electrically connected to the output board (212), the ARM board (26) is arranged between the power board component (25) and the AC filter board (23) and is electrically connected to the output board (212), the DC filter board (22) and the AC filter board (23) are arranged on the third side (2133) of the control main board (21) in sequence, the DC filter board (22) is electrically connected to the power board (211), the AC filter board (23) is electrically connected to the output board (212) via the common mode inductor (24), and the common mode inductor (24) is arranged between the AC filter board (23) and the output board (212).

2. The inverter according to claim 1, characterized in that: The power board assembly (25) comprises a DC power board (251) and an AC power board (252), wherein the DC power board (251) and the AC power board (252) are arranged in sequence along the extension direction of the second side (2132) of the control main board (21), and the DC power board (251) and the AC power board (252) are respectively electrically connected to the output board (212).

3. The inverter according to claim 1, characterized in that: The inverter inductor assembly (27) comprises three inverter inductors, the three inverter inductors are arranged in sequence along the extension direction of the first side (2131) of the control main board (21), and the three inverter inductors are electrically connected to the power board (211) and the output board (212) respectively.

4. The inverter according to claim 1, characterized in that: An input terminal assembly (2201) is provided on a side of the DC filter board (22) away from the control main board (21), and the input terminal assembly (2201) includes two DC input terminals that are respectively electrically connected to the DC filter board (22); an output terminal assembly (2301) is provided on a side of the AC filter board (23) away from the control main board (21), and the output terminal assembly (2301) includes four AC output terminals that are respectively electrically connected to the AC filter board (23).

5. The inverter according to claim 4, characterized in that: A first magnetic ring (2202) is provided between the DC filter board (22) and the input terminal assembly (2201), and a second magnetic ring (2302) is provided between the AC filter board (23) and the output terminal assembly (2301).

6. The inverter according to claim 1, characterized in that: A copper busbar (2203) is provided between the DC filter board (22) and the power board (211), and the DC filter board (22) and the power board (211) are electrically connected via the copper busbar (2203).

7. The inverter according to claim 1, characterized in that: The control main board (21) further includes a fourth side (2134), wherein the first side (2131), the second side (2132), the third side (2133) and the fourth side (2134) of the control main board (21) are sequentially arranged along the outer periphery of the control main board (21); the circuit board assembly (20) further includes a fan assembly (28), and the fan assembly (28) includes four fans, wherein the first fan is arranged on the first side (2131) of the control main board (21), the second fan is arranged on the third side (2133) of the control main board (21), and the third and fourth fans are arranged on the fourth side (2134) of the control main board (21), and the four fans are respectively electrically connected to the output board (212).

8. The inverter according to claim 1, characterized in that: The circuit board assembly (20) further comprises an SVG board (29), wherein the SVG board (29) is arranged on the second side (2132) of the control main board (21) and is electrically connected to the power board (211).

9. The inverter according to claim 1, characterized in that: The circuit board assembly (20) further comprises an indicator light board (210), wherein the indicator light board (210) is arranged between the ARM board (26) and the control main board (21), and the indicator light board (210) is electrically connected to the ARM board (26).

10. The inverter according to any one of claims 1 to 9, characterized in that: The box body (10) is further provided with a second cavity (12), the second cavity (12) being provided with a heat dissipation component (30), a mounting plate (1210) being provided between the second cavity (12) and the first cavity (11), and the mounting plate (1210) being provided with mounting holes (1211) for inserting the common-mode inductor (24) and the inverter inductor component (27).

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