CN220087164U - Photovoltaic inverter circuit board with automatic test - Google Patents
Photovoltaic inverter circuit board with automatic test Download PDFInfo
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- CN220087164U CN220087164U CN202321584708.7U CN202321584708U CN220087164U CN 220087164 U CN220087164 U CN 220087164U CN 202321584708 U CN202321584708 U CN 202321584708U CN 220087164 U CN220087164 U CN 220087164U
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- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims abstract description 37
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of electronic equipment, and discloses a photovoltaic inverter circuit board with automatic test, which comprises a main board and an acquisition circuit, wherein the middle part of one side of the main board is provided with the acquisition circuit, the other side of the main board is provided with an alternating current fan, the acquisition circuit comprises a first filter circuit, a second filter circuit, a voltage follower circuit and a direct current amplifying circuit, the input end of the first filter circuit is connected with a resistor, the other end of the resistor is connected with the negative electrode of a diode, a capacitor and the input end of the second filter circuit, the other end of the capacitor is connected with the alternating current fan, the output end of the second filter circuit is connected with the input end of the voltage follower circuit, and the output end of the voltage follower circuit is connected with the input end of the direct current amplifying circuit. The photovoltaic inverter circuit board with the automatic test function supplies power to the alternating current fan through alternating current filtered by the first filter circuit, so that the heat dissipation performance of a main board is greatly improved, and the efficiency of collecting direct current components is improved.
Description
Technical Field
The utility model relates to the technical field of electronic equipment, in particular to a photovoltaic inverter circuit board with automatic test.
Background
The photovoltaic inverter is an inverter capable of converting variable direct current voltage generated by a photovoltaic solar panel into alternating current with a mains frequency, and can be fed back to a commercial power transmission system or used for an off-grid power grid, is one of important system balances in a photovoltaic array system, and can be used with common alternating current power supply equipment. It has the special functions of matching with the photovoltaic array, such as maximum power point tracking and island effect protection.
In converting dc power into ac power in a photovoltaic inverter, if the dc power is not completely filtered or cut down, a dc component is generated. Detecting the dc component can help determine whether the efficiency and performance of the photovoltaic inverter is affected by the dc component, as well as evaluate the impact of the problem on post-circuit maintenance, remediation.
The direct current separation index of the photovoltaic inverter tested in the prior art is often obtained through large equipment and then analyzed, so that the direct current component is very inconvenient, and in the direct current collection process, alternating current is often filtered in a heat energy mode and cannot be effectively utilized, therefore, the utility model provides the photovoltaic inverter circuit board for automatic test, the filtered alternating current is converted into mechanical energy through the alternating current fan to dissipate heat of the circuit board, the direct current collection efficiency is greatly improved, and a large amount of energy is saved.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides the photovoltaic inverter circuit board with the automatic test function, which has the advantages of convenient use and installation, capability of automatically collecting direct current components, capability of converting filtered alternating current into mechanical energy to dissipate heat for a main board and the like, and solves the problems of inconvenient test, direct filtering of the alternating current by collecting the direct current components, energy waste and the like in the prior art.
(II) technical scheme
In order to achieve the purposes of convenient use and installation, automatic acquisition of direct current components, conversion of filtered alternating current into mechanical energy, heat dissipation of a main board and the like, the utility model provides the following technical scheme: the utility model provides a photovoltaic inverter circuit board with automatic test, includes the mainboard, acquisition circuit, mainboard one side middle part sets up acquisition circuit, and the opposite side sets up alternating current fan, acquisition circuit's input is connected the dc-to-ac converter signal hole, and acquisition circuit's output sets up the direct current output hole, acquisition circuit includes first filter circuit, second filter circuit, voltage follower circuit and direct current amplifier circuit, first filter circuit input connecting resistance, the diode negative pole, electric capacity and second filter circuit's input are connected to the resistance other end, alternating current fan is connected to the electric capacity other end, voltage follower circuit input is connected to the second filter circuit output, direct current amplifier circuit's input is connected to voltage follower circuit output, direct current amplifier circuit external connection external power source hole.
Preferably, a threaded hole is formed in each of four corners of the main board, and the threaded holes can be fixed to the photovoltaic inverter through screws.
Preferably, each element on the collecting circuit is embedded on one side of the main board and connected through a suitable wire.
Preferably, the input end of the second filter circuit is connected with the first filter resistor, the other end of the first filter resistor is connected with the second filter capacitor and the second filter resistor, and the other end of the second filter resistor is connected with the input end of the voltage follower circuit.
Preferably, the input end of the voltage follower circuit is connected with the first voltage follower resistor, the other end of the first voltage follower resistor is connected with the second voltage follower resistor, the voltage follower capacitor and the in-phase input end of the first operational amplifier, the other end of the second voltage follower resistor and the other end of the voltage follower capacitor are grounded, the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier and the third voltage follower resistor, and the other end of the third voltage follower resistor is connected with the input end of the direct current amplifying circuit.
Preferably, the input end of the direct current amplifying circuit is connected with the non-inverting input end of the direct current amplifying resistor I and the non-inverting input end of the operational amplifier II, the other end of the direct current amplifying resistor I is connected with a pull-up voltage end, the pull-up voltage end is connected with an external power hole, the inverting input end of the operational amplifier II is connected with the direct current amplifying resistor II and the direct current amplifying capacitor I, the other end of the direct current amplifying resistor II and the other end of the direct current amplifying capacitor I are connected with the output end of the operational amplifier II and the direct current amplifying resistor III, the other end of the direct current amplifying resistor III is connected with the direct current amplifying capacitor II and the direct current output hole, and the other end of the direct current amplifying capacitor II is connected with a ground wire.
(III) beneficial effects
Compared with the prior art, the utility model provides the photovoltaic inverter circuit board with automatic test, which has the following beneficial effects:
1. this photovoltaic inverter circuit board with automatic test, the alternating current that filters through first filter circuit supplies power to the alternating current fan, makes when testing direct current component to the electric current not extravagant alternating current, and can dispel the heat to the mainboard through the alternating current fan, has greatly improved the heat dispersion of mainboard, has improved the efficiency of gathering direct current component.
2. This photovoltaic inverter circuit board with automatic test, through respectively setting up a screw hole in the mainboard four corners, can pass through the fix with screw on photovoltaic inverter, and each component on the whole collection circuit is all inlayed in mainboard one side, makes the installation that the mainboard can be convenient test on photovoltaic inverter, has simplified the installation and has reduced user's maintenance degree of difficulty simultaneously.
3. The photovoltaic inverter circuit board with the automatic test carries out secondary filtering on current through the second filter circuit, the voltage follower circuit improves the anti-interference capability of the circuit and the common mode rejection capability, and the direct current amplifying circuit amplifies the direct current component, so that the current acquisition quality is greatly improved, and the direct current component is conveniently analyzed.
Drawings
FIG. 1 is a schematic side view of a motherboard according to the present utility model;
FIG. 2 is a schematic diagram of a side of a motherboard with an acquisition circuit according to the present utility model;
FIG. 3 is a schematic diagram of a motherboard with an AC fan;
FIG. 4 is a schematic diagram of an acquisition circuit according to the present utility model;
FIG. 5 is a schematic diagram of a first filter circuit according to the present utility model;
FIG. 6 is a schematic diagram of a second filter circuit according to the present utility model;
FIG. 7 is a schematic diagram of a voltage follower circuit according to the present utility model;
fig. 8 is a dc enlarged schematic diagram of the present utility model.
In the figure: 1 a main board, 11 a threaded hole, 12 an alternating current fan, 13 an inverter signal hole, 14 an external power hole, 15 a direct current output hole, 2 a collection circuit, 21 a first filter circuit, 211 a resistor, 212 a diode, 213 a capacitor, 22 a second filter circuit, 221 a first filter resistor, 222 a second filter resistor, 223 a filter capacitor, 23 a voltage follower circuit, 231 a voltage follower resistor, 232 a voltage follower resistor, 233 a voltage follower resistor three, 234 a voltage follower capacitor, 235 a first operational amplifier, 24 a direct current amplifying circuit, 241 a direct current amplifying resistor, 242 a direct current amplifying resistor two, 243 a direct current amplifying resistor three, 244 a pull-up voltage end, 245 a second operational amplifier, 246 a first direct current amplifying capacitor and 247 a second direct current amplifying capacitor.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-8, a circuit board of a photovoltaic inverter with automatic test, which comprises a main board 1, a collecting circuit 2, wherein four corners of the main board 1 are respectively provided with a threaded hole 11, the threaded holes 11 can be fixed on the photovoltaic inverter through screws, the collecting circuit 2 is arranged in the middle of one side of the main board 1, each element on the collecting circuit 2 is embedded on one side of the main board and connected through a proper wire, an alternating current fan 12 is arranged on the other side of the collecting circuit 2, the input end of the collecting circuit 2 is connected with an inverter signal hole 13, the output end of the collecting circuit 2 is provided with a direct current output hole 15, the collecting circuit 2 comprises a first filter circuit 21, a second filter circuit 22, a voltage follower circuit 23 and a direct current amplifying circuit 24, the input end of the first filter circuit 21 is connected with a resistor 211, the other end of the resistor 211 is connected with the cathode of a diode 212, a capacitor 213 and the input end of the second filter circuit 22, the other end of the capacitor 213 is connected with the AC fan 12, the input end of the second filter circuit 22 is connected with the first filter resistor 221, the other end of the first filter resistor 221 is connected with the second filter capacitor 223 and the second filter resistor 222, the other end of the second filter resistor 222 is connected with the input end of the voltage follower circuit 23, the input end of the voltage follower circuit 23 is connected with the first voltage follower resistor 231, the other end of the first voltage follower resistor 231 is connected with the second voltage follower resistor 232, the voltage follower capacitor 234 and the in-phase input end of the first operational amplifier 235, the other end of the second voltage follower resistor 232 and the other end of the voltage follower capacitor 234 are grounded, the inverting input end of the first operational amplifier 235 is connected with the output end of the first operational amplifier 235 and the third voltage follower resistor 233, the other end of the third voltage follower resistor 233 is connected with the input end of the DC amplifying circuit 24, the input end of the DC amplifying circuit 24 is connected with the DC amplifying resistor I241 and the in-phase input end of the operational amplifier II 245, the other end of the DC amplifying resistor I241 is connected with the pull-up voltage end 244, the pull-up voltage end 244 is connected with the external power hole 14, the inverting input end of the operational amplifier II 245 is connected with the DC amplifying resistor II 242 and the DC amplifying capacitor I246, the other end of the DC amplifying resistor II 242 and the other end of the DC amplifying capacitor I246 are connected with the output end of the operational amplifier II 245 and the DC amplifying resistor III 243, the other end of the DC amplifying resistor III 243 is connected with the DC amplifying capacitor II 247 and the DC output hole 15, and the other end of the DC amplifying capacitor II 247 is connected with the ground wire.
When the signal of the photovoltaic inverter is tested for direct current components, only the signal generated by the photovoltaic inverter is connected to the inverter signal hole 13 on the main board 1, the signal enters the first filter circuit 21 through the input end of the acquisition circuit 2, the direct current components in the signal flow to the input end of the second filter circuit 22 through the resistor 211, the alternating current components of the signal flow to the alternating current fan 12 through the capacitor 213, the alternating current fan 12 rotates to radiate the main board 1, the direct current components entering the second filter circuit 22 flow to the input end of the voltage follower circuit 23 through the first filter resistor 221 and the second filter resistor 222, a small amount of alternating current components flow to the filter capacitor 223 to be absorbed, the direct current components flowing to the voltage follower circuit 23 flow to the in-phase input end of the first filter capacitor 235 through the first filter resistor 231, the direct current components flow to the input end of the third filter resistor 233 from the output end of the first filter amplifier 235, the voltage follower circuit 23 can increase the anti-interference capacity of the signal, the common mode rejection capacity is stronger, the direct current components in the residual direct current components can flow to the input end of the second filter circuit 245 through the second filter capacitor 245, the direct current components in the second filter circuit 245 are amplified by the second filter capacitor 245, the direct current components are amplified by the second filter, and the direct current components in the opposite direction from the output end of the first filter circuit 245, the second filter is amplified by the second filter, and the direct current components are amplified by the output by the second filter, and the direct current components, the direct current components in the opposite current components, and the direct current components in the opposite to the output by the output end of the output voltage.
In summary, according to the photovoltaic inverter circuit board with automatic test, the alternating current filtered by the first filter circuit 21 supplies power to the alternating current fan 12, so that the alternating current is not wasted when the direct current component is tested, and the heat of the main board 1 can be dissipated through the alternating current fan 12, so that the heat dissipation performance of the main board 1 is greatly improved, and the efficiency of collecting the direct current component is improved.
This photovoltaic inverter circuit board with automatic test, through respectively setting up a screw hole 11 in mainboard 1 four corners, can pass through the fix with screw on photovoltaic inverter, and each component on whole acquisition circuit 2 all inlays in mainboard one side, makes the mainboard 1 can be convenient install and test on photovoltaic inverter, has simplified the installation and has reduced user's maintenance degree of difficulty simultaneously.
The photovoltaic inverter circuit board with automatic test carries out secondary filtering on current through the second filter circuit 22, the voltage follower circuit 23 improves the anti-interference capability of the circuit and the common mode rejection capability, and the direct current amplifying circuit 24 amplifies the direct current component, so that the current acquisition quality is greatly improved, and the direct current component is conveniently analyzed.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a photovoltaic inverter circuit board with automatic test, includes mainboard (1), acquisition circuit (2), its characterized in that: the novel power supply is characterized in that an acquisition circuit (2) is arranged in the middle of one side of the main board (1), an alternating current fan (12) is arranged on the other side of the main board, an input end of the acquisition circuit (2) is connected with an inverter signal hole (13), an output end of the acquisition circuit (2) is provided with a direct current output hole (15), the acquisition circuit (2) comprises a first filter circuit (21), a second filter circuit (22), a voltage follower circuit (23) and a direct current amplifier circuit (24), an input end of the first filter circuit (21) is connected with a resistor (211), the other end of the resistor (211) is connected with an input end of a diode (212), a capacitor (213) and a second filter circuit (22), the other end of the capacitor (213) is connected with the alternating current fan (12), an output end of the second filter circuit (22) is connected with an input end of the voltage follower circuit (23), and an output end of the voltage follower circuit (23) is connected with an input end of the direct current amplifier circuit (24), and the external power supply hole is connected with the external power supply.
2. A photovoltaic inverter circuit board with automatic testing according to claim 1, wherein: the four corners of the main board (1) are respectively provided with a threaded hole (11), and the threaded holes (11) can be fixed on the photovoltaic inverter through screws.
3. A photovoltaic inverter circuit board with automatic testing according to claim 1, wherein: each element on the acquisition circuit (2) is embedded on one side of the main board and connected through a proper wire.
4. A photovoltaic inverter circuit board with automatic testing according to claim 1, wherein: the input end of the second filter circuit (22) is connected with a first filter resistor (221), the other end of the first filter resistor (221) is connected with a filter capacitor (223) and a second filter resistor (222), and the other end of the second filter resistor (222) is connected with the input end of the voltage follower circuit (23).
5. A photovoltaic inverter circuit board with automatic testing according to claim 1, wherein: the input end of the voltage follower circuit (23) is connected with a first voltage follower resistor (231), the other end of the first voltage follower resistor (231) is connected with a second voltage follower resistor (232), a voltage follower capacitor (234) and the in-phase input end of an operational amplifier (235), the other end of the second voltage follower resistor (232) and the other end of the voltage follower capacitor (234) are grounded, the inverting input end of the operational amplifier (235) is connected with the output end of the operational amplifier (235) and a third voltage follower resistor (233), and the other end of the third voltage follower resistor (233) is connected with the input end of the direct current amplifier circuit (24).
6. A photovoltaic inverter circuit board with automatic testing according to claim 1, wherein: the DC amplifying circuit is characterized in that the input end of the DC amplifying circuit (24) is connected with the non-inverting input end of the DC amplifying resistor I (241) and the operational amplifier II (245), the other end of the DC amplifying resistor I (241) is connected with the pull-up voltage end (244), the pull-up voltage end (244) is connected with the external power hole (14), the inverting input end of the operational amplifier II (245) is connected with the DC amplifying resistor II (242) and the DC amplifying capacitor I (246), the other end of the DC amplifying resistor II (242) and the other end of the DC amplifying capacitor I (246) are connected with the output end of the operational amplifier II (245) and the DC amplifying resistor III (243), the other end of the DC amplifying resistor III (243) is connected with the DC amplifying capacitor II (247) and the DC output hole (15), and the other end of the DC amplifying capacitor II (247) is connected with a ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321584708.7U CN220087164U (en) | 2023-06-20 | 2023-06-20 | Photovoltaic inverter circuit board with automatic test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321584708.7U CN220087164U (en) | 2023-06-20 | 2023-06-20 | Photovoltaic inverter circuit board with automatic test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220087164U true CN220087164U (en) | 2023-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321584708.7U Active CN220087164U (en) | 2023-06-20 | 2023-06-20 | Photovoltaic inverter circuit board with automatic test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220087164U (en) |
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2023
- 2023-06-20 CN CN202321584708.7U patent/CN220087164U/en active Active
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