Photovoltaic inverter without inductive wiring

Abstract

The utility model relates to the technical field of photovoltaic circuit hardware design, in particular to a photovoltaic inverter without inductive wiring. The power amplifier mainly comprises an inductance device, and the inductance device comprises a box body, a plurality of inductance coils installed in the box body and an inductance plate arranged between a power plate and the box body. The inductance plate is provided with a connecting device, the connecting device comprises a wiring port used for being connected with an inductance wire of the inductance coil and a conductive terminal used for being connected with the power plate, and the wiring port is communicated with the conductive terminal. According to the utility model, the connection structure of the inductor unit and the power board is optimized, so that the installation form of winding arrangement of non-inductor wires is realized, the production and assembly difficulty is reduced, and the anti-interference performance and the heat dissipation performance during use are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic circuit hardware design, in particular to a photovoltaic inverter without inductance routing. Background Art

[0002] Photovoltaic inverter is a device that converts direct current from solar panels into alternating current. It is mainly composed of a boost circuit and an inverter bridge circuit, and a large number of electronic components are integrated on the power board. Since photovoltaic inverters have a higher demand for voltage stabilization, the larger the inductor volume used, the inductor unit is usually separated from the power board, and the two are connected by wires.

[0003] In the prior art, the photovoltaic inverter housing is usually used as the main support and installation component to install the power board and the inductor unit at the same time. The inductor wires locked on the power board have two outlet positions: 1. On the front of the power board, 2. On the back of the power board. For the inductor wires with outlets on the front, ordinary terminals can be used to wire and lock them on the front of the power board. For the inductor wires with outlets on the back of the power board, if you want to lock them to the mainboard, you need to increase the length of the wire to bypass the back of the power board and use ordinary OT terminals to lock them to the front of the power board. This method not only prolongs the length of the inductor wire and reduces the assemblability, but also the potential electromagnetic interference caused by the electronic components on the power board will affect the performance of the inductor. In addition, the longer wires are piled on the back of the power board, which will reduce the heat dissipation performance of the entire photovoltaic inverter. Utility Model Content

[0004] In order to make up for the shortcomings of the prior art, the utility model proposes a photovoltaic inverter with non-inductor routing, which realizes the installation form of non-inductor wire winding arrangement by optimizing the connection structure between the inductor unit and the power board, reduces the difficulty of production and assembly, and improves the anti-interference and heat dissipation during use.

[0005] In order to achieve the above purpose, the specific technical solutions adopted by the utility model are as follows:

[0006] A photovoltaic inverter with no inductor routing comprises a shell and a power board, and is characterized in that it also comprises an inductor device, wherein the inductor device comprises a box body, a plurality of inductor coils installed in the box body, and an inductor board arranged between the power board and the box body; a connecting device is arranged on the inductor board, and the connecting device comprises a wiring port for connecting the inductor wire of the inductor coil and a conductive terminal for connecting the power board, and the wiring port is connected to the conductive terminal.

[0007] Therefore, the shell is the main supporting component of the photovoltaic inverter, which is used to install all electronic components. It has installation space for installing the inductor device and installation space for installing the power board. The power board is arranged above the box body of the inductor device, and the two are conductively connected through the inductor board to achieve the original purpose of connecting the inductor coil to the power circuit.

[0008] The inductor board is provided with a connection device, which is mainly used to simultaneously connect the inductor wire and the power board of the inductor coil. The connection device includes a wiring port and a conductive terminal, wherein the wiring port is mainly used to connect the inductor wire to the inductor board, which can be a wiring through hole. The metal end of the inductor wire is inserted into the wiring through hole and connected to the inductor board by welding. The conductive terminal can be installed on the inductor board by overcurrent welding, and inside the inductor board, the built-in wire connects the conductive terminal to the wiring port one by one, so as to realize the function of connecting the conductive terminal to the inductor wire joint of the inductor coil. The lower surface of the power board is close to the upper surface of the inductor board, so that the conductive terminal can directly contact the metal connection point on the power board and realize the connection.

[0009] This structure, which uses the inductor plate as a connection medium, realizes an installation form in which the wires are arranged in a winding manner without inductance, reduces the difficulty of production and assembly, and improves the anti-interference and heat dissipation performance during use.

[0010] As a preferred embodiment of the present invention, a thermally conductive silica gel is provided between the bottom of the inductor coil and the inner bottom of the box body for improving the heat dissipation performance of the inductor device.

[0011] Since the inductor is a passive component, its main function is to store energy or prevent current changes. When the inductor is energized, a certain amount of loss will inevitably occur, and the loss will generate heat. Therefore, the inductor will generate more heat when working. The heat-conductive silicone is arranged between the bottom of the inductor and the bottom of the inner side of the box body, so that the heat of the inductor can be quickly transferred to the bottom of the box body, thereby improving the overall heat dissipation performance of the inductor device.

[0012] As a preferred embodiment of the present invention, a thermally conductive silica gel is provided between the inductor coil and the inner wall of the box body for improving the heat dissipation performance of the inductor device.

[0013] Heat-conductive silica gel is arranged between the inductor coil and the inner wall of the box body, so that the heat of the inductor coil can be quickly transferred to the box body, thereby improving the overall heat dissipation performance of the inductor device.

[0014] As a preferred embodiment of the present invention, an insulating cushion layer is provided between the inductor plate and the upper surface of the box body.

[0015] Since the inductor plate is a live component, it is fitted and fixed to the box body, and the box body is usually made of metal parts. In order to avoid leakage interference between the two, an insulating cushion layer is provided. The insulating cushion layer has a through hole for the inductor wire of the inductor coil to pass through, and the insulating cushion layer can be made of insulating paper, rubber or other materials.

[0016] As a preferred embodiment of the present invention, the power board includes a board body and a conductive through hole arranged on the board body for connecting the conductive terminal.

[0017] There are multiple conductive through holes on the board. When the board is aligned with the installation position of the inductor board, each conductive through hole is aligned with a conductive terminal. At this time, a conductive screw can be used to lock the board from the upper surface to the lower surface of the board. Each conductive through hole is conductive and connected to the corresponding circuit interface on the power board. At this time, the inductor coil can be connected to the power board.

[0018] As a preferred embodiment of the present invention, the photovoltaic inverter without inductor wiring further comprises a locking component, and the locking component comprises a first locking screw for fixing the inductor plate on the box body.

[0019] In order to prevent the inductor board from accidentally moving and tearing off the inductor wire of the inductor coil, a plurality of first locking screws are used to pass through the screw mounting holes on the inductor board to fix it to the box body.

[0020] As a preferred embodiment of the present invention, the locking assembly further includes a second locking screw for fixing the conductive terminal on the plate body, and the second locking screw passes through the conductive through hole and is connected to the conductive terminal.

[0021] There are multiple conductive through holes on the board. When the board is aligned with the installation position of the inductor board, each conductive through hole is aligned with a conductive terminal. At this time, the second locking screw can be used to achieve locking from the upper surface of the board to the lower surface of the board. Each conductive through hole is conductive and connected to the corresponding circuit interface on the power board.

[0022] As a preferred embodiment of the present invention, the length of the inductor wire end of the inductor coil passing through the wiring port is greater than or equal to 2 mm.

[0023] The length of the inductor wire end of the inductor coil passing through the wiring port is greater than or equal to 2 mm to ensure the firmness of its welding with the wiring port. The specific preferred lengths are, for example, 2.5 mm, 2.7 mm, and 3 mm.

[0024] As a preferred embodiment of the present invention, the inductive device further comprises a plurality of heat dissipation sheets installed at intervals below the box body.

[0025] In summary, the utility model has the following beneficial effects:

[0026] 1. By setting up the inductor board, the inductor coil can be connected to the power board without any extra inductor wire. This structure, which uses the inductor board as a connection medium, realizes the installation form without the winding arrangement of the inductor wire, reduces the difficulty of production and assembly, and improves the anti-interference and heat dissipation during use.

[0027] 2. By providing the conductive terminal, the conductive through hole and the second locking screw, the installation efficiency of fixing the power board on the inductor device is improved, and compared with the welding connection form of the wire, the stability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the photovoltaic inverter without inductor routing;

[0029] Figure 2 is an exploded diagram of the inductor device;

[0030] Figure 3 is a top view of the inductive device;

[0031] Figure 4 A side view of an inductive device.

[0032] In the figure: housing 1, power board 2, board body 21, conductive through hole 22, inductor device 3, box body 31, inductor coil 32, inductor board 33, heat sink 34, connecting device 4, wiring port 41, conductive terminal 42, locking assembly 5, first locking screw 51, second locking screw 52. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Anyone can implement the present disclosure in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0034] like Figure 1 and Figure 2 As shown, the shell 1 is the main supporting component of the photovoltaic inverter, which is used to install all electronic components. There is an installation space for installing the inductor device 3 and an installation space for installing the power board 2. The power board 2 is arranged above the box body 31 of the inductor device 3. The two are conductively connected through the inductor board 33 to achieve the original purpose of connecting the inductor coil 32 to the power circuit.

[0035] like Figure 3 and Figure 4As shown, a connection device 4 is provided on the inductor board 33, which is mainly used to connect the inductor line of the inductor coil 32 and the power board 2 at the same time. The connection device 4 includes a wiring port 41 and a conductive terminal 42, wherein the wiring port 41 is mainly used to connect the inductor line to the inductor board 33, which can be a wiring through hole, and the metal end of the inductor line is inserted into the wiring through hole, and connected to the inductor board 33 by welding. The conductive terminal 42 can be installed on the inductor board 33 by overcurrent welding, and inside the inductor board 33, the built-in wire connects the conductive terminal 42 with the wiring port 41 one by one, so that the conductive terminal 42 can be connected to the inductor line connector of the inductor coil 32. The lower surface of the power board 2 is close to the upper surface of the inductor board 33, so that the conductive terminal 42 can directly contact the metal connection point on the power board 2 and achieve connection.

[0036] like Figure 2 As shown, a plurality of conductive through holes 22 are provided on the board body 21. When the board body 21 is aligned with the installation position of the inductor board 33, each conductive through hole 22 is aligned with a conductive terminal 42. At this time, a conductive screw can be used to achieve locking from the upper surface of the board body 21 to the lower surface of the board body 21. Each conductive through hole 22 is conductive and is connected to the corresponding circuit interface on the power board 2. At this time, the inductor coil 32 can be connected to the power board 2.

[0037] like Figure 2 and Figure 3 As shown, the locking assembly 5 includes a first locking screw 51 for fixing the inductor plate 33 on the box body 31. The locking assembly 5 also includes a second locking screw 52 for fixing the conductive terminal 42 on the board body 21, and the second locking screw 52 passes through the conductive through hole 22 and is connected to the conductive terminal 42. When the board body 21 and the mounting position of the inductor plate 33 are aligned, each conductive through hole 22 is aligned with a conductive terminal 42, and at this time, the second locking screw 52 can be used to achieve locking from the upper surface of the board body 21 to the lower surface of the board body 21, and each conductive through hole 22 is conductive and is connected to the corresponding circuit interface on the power board 2.

[0038] like Figure 1 and Figure 4 The inductor device 3 further comprises a plurality of heat dissipation sheets 34 installed at intervals below the box body 31. This can further improve its heat dissipation capability.

[0039] The above description is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. The structural member materials, sizes, shapes, etc. mentioned in the embodiments of the present application are all schematic descriptions and do not constitute strict or absolute limitations. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A photovoltaic inverter with no inductor routing, comprising a housing (1) and a power board (2), characterized in that: The invention also comprises an inductor device (3), the inductor device (3) comprising a box body (31), a plurality of inductor coils (32) installed in the box body (31), and an inductor plate (33) arranged between the power plate (2) and the box body (31); the inductor plate (33) is provided with a connecting device (4), the connecting device (4) comprising a wiring port (41) for connecting an inductor line of the inductor coil (32) and a conductive terminal (42) for connecting the power plate (2), the wiring port (41) being in communication with the conductive terminal (42).

2. The photovoltaic inverter with no inductance routing according to claim 1, characterized in that: A thermally conductive silica gel for improving the heat dissipation performance of the inductive device (3) is provided between the bottom of the inductive coil (32) and the inner bottom of the box body (31).

3. The photovoltaic inverter with no inductance routing according to claim 1, characterized in that: Thermally conductive silica gel for improving the heat dissipation performance of the inductive device (3) is provided between the periphery of the inductive coil (32) and the periphery of the inner side of the box body (31).

4. The photovoltaic inverter with no inductor routing according to claim 1, characterized in that: An insulating cushion layer is provided between the inductor plate (33) and the upper surface of the box body (31).

5. The photovoltaic inverter with no inductor routing according to claim 1, characterized in that: The power board (2) comprises a board body (21) and a conductive through hole (22) arranged on the board body (21) and used for connecting the conductive terminal (42).

6. The photovoltaic inverter with no inductor routing according to claim 5, characterized in that: The photovoltaic inverter without inductor wiring further comprises a locking component (5), wherein the locking component (5) comprises a first locking screw (51) for fixing the inductor plate (33) on the box body (31).

7. The photovoltaic inverter with no inductor routing according to claim 6, characterized in that: The locking assembly (5) further comprises a second locking screw (52) for fixing the conductive terminal (42) on the plate body (21); the second locking screw (52) passes through the conductive through hole (22) and is connected to the conductive terminal (42).

8. The photovoltaic inverter with no inductor routing according to claim 7, characterized in that: The length of the inductor wire end of the inductor coil (32) passing through the wiring port (41) is greater than or equal to 2 millimeters.

9. A photovoltaic inverter without inductance routing according to any one of claims 1 to 8, characterized in that: The inductive device (3) further comprises a plurality of heat dissipation sheets (34) installed at intervals below the box body (31).

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