CN202815061U - Photovoltaic power station bus box current measuring circuit - Google Patents
Photovoltaic power station bus box current measuring circuit Download PDFInfo
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- CN202815061U CN202815061U CN 201220470583 CN201220470583U CN202815061U CN 202815061 U CN202815061 U CN 202815061U CN 201220470583 CN201220470583 CN 201220470583 CN 201220470583 U CN201220470583 U CN 201220470583U CN 202815061 U CN202815061 U CN 202815061U
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- hall effect
- effect sensor
- operational amplifier
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- type hall
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Abstract
The utility model relates to a photovoltaic power station bus box current measuring circuit which comprises a chip type hall effect sensor. The output end of the chip type hall effect sensor is connected with the in-phase end of an operational amplifier. The output end of the operational amplifier is connected with the anti-phase end of the operational amplifier through a resistor. The output end of the operational amplifier is grounded through a twenty-fifth capacitor. According to the utility model, the chip type hall effect sensor uses an ACS712 chip, thus the volume of a current hall effect sensor during bus monitoring is reduced; the size of the circuit of a whole monitoring device is 30cm*9mm; sixteen paths of current can be monitored, and each path of current can reach plus or minus 20A; the chip type hall effect sensor is connected with the output end of a photovoltaic battery panel, thus the output of a corresponding photovoltaic battery panel can be detected; corresponding detection current is acquired through the operational amplifier; and the photovoltaic power station bus box current measuring circuit has the advantages of simple and compact structure, safety and reliability.
Description
Technical field
The utility model relates to a kind of current measurement circuit, and especially a kind of photovoltaic plant header box current measurement circuit belongs to the technical field that photovoltaic combiner box detects.
Background technology
Along with the development of society, the demand day of the energy is becoming tight.China's solar energy resources is very abundant, and the construction of accelerating photovoltaic plant not only tallies with the national condition, and also can more effectively promote China's structural transformation of the economy and energy structure optimizing.Along with the development of computer technology, people are more and more higher to the monitoring requirement of photovoltaic plant, and the intellectuality of header box is more and more universal.
At present, in the intelligent junction box mode of monitoring current mostly be use threading type, volume larger in the hall effect current sensor of magnet ring is arranged.Because used large, the expensive current sensor of volume, thus caused watch-dog also to need volume is done greatly, and because the cost of this type sensor is high, for the header box of 16 road electric currents, cost is just higher.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of photovoltaic plant header box current measurement circuit is provided, and it is simple and compact for structure, has reduced to take up room and use cost, and is safe and reliable.
The technical scheme that provides according to the utility model, described photovoltaic plant header box current measurement circuit, comprise the chip type hall effect sensor, the output terminal of described chip type hall effect sensor links to each other with the in-phase end of operational amplifier, the output terminal of operational amplifier links to each other with the end of oppisite phase of operational amplifier by resistance, and the output terminal of operational amplifier is by the 25 capacity earth.
Described chip type hall effect sensor adopts the ACS712 chip.
The VCC end of described chip type hall effect sensor links to each other with power supply VCC, and by the 13 capacity earth; The FLT end of chip type hall effect sensor is by the 23 capacity earth; The GND end ground connection of chip type hall effect sensor; The input end of chip type hall effect sensor links to each other with the output terminal of photovoltaic battery panel.
The cathode power supply end of described operational amplifier links to each other with power supply VCC, and by the 21 capacity earth; The negative power supply end ground connection of operational amplifier.
Advantage of the present utility model: the chip type hall effect sensor adopts the ACS712 chip, the volume of current Hall effect sensor in the monitoring has reduced to conflux, can monitor 16 road electric currents so that the circuit of whole watch-dog is accomplished the size of 30cm*9mm, every road electric current can reach positive and negative 20A.With after the output terminal of photovoltaic battery panel links to each other, can detect the output of corresponding photovoltaic battery panel by the chip type hall effect sensor, by being detected accordingly electric current behind the operational amplifier, simple and compact for structure, safe and reliable.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with concrete drawings and Examples.
As shown in Figure 1: the utility model comprises chip type hall effect sensor U1, the output terminal of described chip type hall effect sensor U1 links to each other with the in-phase end of operational amplifier U21A, the output terminal of operational amplifier U21A links to each other with the end of oppisite phase of operational amplifier U21A by resistance R 26, and the output terminal of operational amplifier U21A is by the 25 capacitor C 25 ground connection.
Among the utility model embodiment, described chip type hall effect sensor U1 adopts the ACS712 chip; And when chip type hall effect sensor U1 adopted the ACS712 chip, the VCC of described chip type hall effect sensor U1 end linked to each other with power supply VCC, and by the 13 capacitor C 13 ground connection; The FLT end of chip type hall effect sensor U1 is by the 23 capacitor C 23 ground connection; The GND end ground connection of chip type hall effect sensor U1; The IP+ of chip type hall effect sensor U1, IP-input end link to each other with the output terminal of photovoltaic battery panel.The cathode power supply end of described operational amplifier U21A links to each other with power supply VCC, and by the 21 capacitor C 21 ground connection; The negative power supply end ground connection of operational amplifier U21A.
The utility model chip type hall effect sensor U1 adopts the ACS712 chip, the volume of current Hall effect sensor in the monitoring has reduced to conflux, can monitor 16 road electric currents so that the circuit of whole watch-dog is accomplished the size of 30cm*9mm, every road electric current can reach positive and negative 20A.With after the output terminal of photovoltaic battery panel links to each other, can detect the output of corresponding photovoltaic battery panel by chip type hall effect sensor U1, by being detected accordingly electric current behind the operational amplifier U21A, simple and compact for structure, safe and reliable.
Claims (4)
1. photovoltaic plant header box current measurement circuit, it is characterized in that: comprise chip type hall effect sensor (U1), the output terminal of described chip type hall effect sensor (U1) links to each other with the in-phase end of operational amplifier (U21A), the output terminal of operational amplifier (U21A) links to each other with the end of oppisite phase of operational amplifier (U21A) by resistance (R26), and the output terminal of operational amplifier (U21A) is by the 25 electric capacity (C25) ground connection.
2. photovoltaic plant header box current measurement circuit according to claim 1 is characterized in that: described chip type hall effect sensor (U1) employing ACS712 chip.
3. photovoltaic plant header box current measurement circuit according to claim 2 is characterized in that: the VCC end of described chip type hall effect sensor (U1) links to each other with power supply VCC, and passes through the 13 electric capacity (C13) ground connection; The FLT end of chip type hall effect sensor (U1) is by the 23 electric capacity (C23) ground connection; The GND end ground connection of chip type hall effect sensor (U1); The input end of chip type hall effect sensor (U1) links to each other with the output terminal of photovoltaic battery panel.
4. photovoltaic plant header box current measurement circuit according to claim 1, it is characterized in that: the cathode power supply end of described operational amplifier (U21A) links to each other with power supply VCC, and by the 21 electric capacity (C21) ground connection; The negative power supply end ground connection of operational amplifier (U21A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220470583 CN202815061U (en) | 2012-09-15 | 2012-09-15 | Photovoltaic power station bus box current measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220470583 CN202815061U (en) | 2012-09-15 | 2012-09-15 | Photovoltaic power station bus box current measuring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202815061U true CN202815061U (en) | 2013-03-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220470583 Expired - Fee Related CN202815061U (en) | 2012-09-15 | 2012-09-15 | Photovoltaic power station bus box current measuring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202815061U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836524A (en) * | 2015-04-30 | 2015-08-12 | 成都锐奕信息技术有限公司 | Cell sampling circuit for solar power generation system |
-
2012
- 2012-09-15 CN CN 201220470583 patent/CN202815061U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836524A (en) * | 2015-04-30 | 2015-08-12 | 成都锐奕信息技术有限公司 | Cell sampling circuit for solar power generation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20190915 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |