CN202421410U - Polarity judger for solar grid-connected inverter - Google Patents
Polarity judger for solar grid-connected inverter Download PDFInfo
- Publication number
- CN202421410U CN202421410U CN201220050859XU CN201220050859U CN202421410U CN 202421410 U CN202421410 U CN 202421410U CN 201220050859X U CN201220050859X U CN 201220050859XU CN 201220050859 U CN201220050859 U CN 201220050859U CN 202421410 U CN202421410 U CN 202421410U
- Authority
- CN
- China
- Prior art keywords
- input end
- detection
- optocoupler
- input
- polarity
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a polarity judger for a solar grid-connected inverter. The polarity judger is simple in structure, convenient to use, sensitive and high in efficiency. The polarity judger comprises an input loop, an output loop, a detection input end, an input resistor, a conductive diode, a combined optocoupler, a light-emitting diode, a detection power supply, an optocoupler transistor, a detection output end, a detection resistor, an input end pin a and an input end pin b, wherein the detection input end comprises the input end pins a and b; the light-emitting diode and the optocoupler transistor form the combined optocoupler; the detection input end, the input resistor and the conductive diode form the input loop; the detection power supply, the optocoupler transistor, the detection output end and the detection resistor form the output loop; and the input loop is connected in parallel with the light-emitting diode in the combined optocoupler. A power diode, a radiator and a fan radiation system are eliminated, and the polarity judger only comprises current limiting resistors, and does not comprise any high power device, so that the polarity judger is low in power consumption, and the overall efficiency of the inverter is improved.
Description
Technical field
The utility model relates to a kind of sun power pick-up unit, specifically is solar grid-connected inverter polarity determining device.
Background technology
Sun power is used more and more widely as a kind of novel energy.And the generating electricity by way of merging two or more grid systems of sun power large-scale power station also become a kind of proven technique and has been widely used.In solar electrical energy generation; Combining inverter direct current input error-polarity connection can cause great infringement with inverter to solar panel, and the polarity of solar grid-connected inverter direct current input at present detects the method that is employed in series connection power diode on the main circuit more and prevents that inverter input end polarity from connecing instead, because the power electric current all flows through diode; Its loss is big; Also will add heating radiator to diode in addition, also will have fan to dispel the heat to it, cost will be very high like this.
Summary of the invention
The utility model provides a kind of simple in structure, easy to use to above technical matters, and sensitivity is solar grid-connected inverter polarity determining device efficiently.
The utility model is realized through following technical scheme.
Solar grid-connected inverter polarity determining device; Comprise input circuit, output loop, detection input end, input resistance, conduction diode, combination optocoupler, light emitting diode, detection power supply, optocoupler transistor, detect output terminal, detect resistance, input end a pin, input end b pin; It is characterized in that detecting input end and contain input end a pin and input end b pin; Light emitting diode and optocoupler transistor are formed the combination optocoupler; Detect input end, input resistance, conduction diode formation input circuit, detection power supply, optocoupler transistor, detection output terminal, detection resistance are formed output loop, and input circuit and the light emitting diode that makes up in the optocoupler are parallelly connected.
Description of drawings
Fig. 1 is the structural representation of the utility model, wherein:
The 1-input circuit, the 2-output loop, 3-detects input end, and 4-input resistance, 5-conduct electricity diode; 6-makes up optocoupler, the 7-light emitting diode, and 8-detects power supply, 9-optocoupler transistor; 10-detects output terminal, and 11-detects resistance, 12-input end a pin, 13-input end b pin.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Solar grid-connected inverter polarity determining device; Comprise input circuit 1, output loop 2, detection input end 3, input resistance 4, conduction diode 5, combination optocoupler 6, light emitting diode 7, detect power supply 8, optocoupler transistor 9, detection output terminal 10, detection resistance 11, input end a pin 12, input end b pin 13; It is characterized in that detecting input end 3 and contain input end a pin 12 and input end b pin 13; Light emitting diode 7 is formed combination optocoupler 6 with optocoupler transistor 9; Detect input end 3, input resistance 4, conduction diode 5 formation input circuits 1; Input circuit 2 and light emitting diode 7 parallel connections of making up in the optocoupler 6, detection power supply 8, optocoupler transistor 9, detection output terminal 10, detection resistance 11 are formed output loop 2, and input circuit 1 and output loop 2 pass through to make up optocoupler 6 connections.
If the input end a pin 12 that detects input end 3 inserts the positive pole of solar panel; Input end b pin 13 inserts the negative pole of solar panel; Then electric current is through input end a pin 12; Flow through input resistance 4 and conduction diode 5 flows into input end b pin 13 (solar panel negative), because the single-phase conducting effect of conduction diode 5 is conducting state, the light emitting diode 7 in the combination optocoupler 6 can not conducting; Optocoupler transistor 9 in the combination optocoupler 6 can not outwards be carried signal, detects output terminal 10 output low levels; Insert the positive pole of solar panel when the input end b pin that detects input end 3 13; Input end a pin 12 inserts the negative pole of solar panel, because the single-phase conducting effect of conduction diode 5 is not on-state, then electric current is through input end b pin 13; Flow through and make up the light emitting diode 7 and input resistance 4 in the optocoupler 6; Flow into input end a pin 12 (positive pole of solar panel) then, since light emitting diode 7 conductings in the combination optocoupler 6, optocoupler transistor 9 saturation conductions in the combination optocoupler 6; Detect power supply 8 and directly be added on the detection resistance 11, detect output terminal 10 output high level.Therefore, just can judge directly through the high-low level that detects output terminal 10 outputs whether the polarity of input solar panel is correct.
Because the utility model has saved power diode, heating radiator, fan radiating system so the utility model has only some current-limiting resistances, does not have big power device, and power consumption is very little, has improved the whole efficiency of inverter.
Claims (1)
1. solar grid-connected inverter polarity determining device; Comprise input circuit, output loop, detection input end, input resistance, conduction diode, combination optocoupler, light emitting diode, detection power supply, optocoupler transistor, detect output terminal, detect resistance, input end a pin, input end b pin; It is characterized in that detecting input end and contain input end a pin and input end b pin; Light emitting diode and optocoupler transistor are formed the combination optocoupler; Detect input end, input resistance, conduction diode formation input circuit, detection power supply, optocoupler transistor, detection output terminal, detection resistance are formed output loop, and input circuit and the light emitting diode that makes up in the optocoupler are parallelly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220050859XU CN202421410U (en) | 2012-02-16 | 2012-02-16 | Polarity judger for solar grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220050859XU CN202421410U (en) | 2012-02-16 | 2012-02-16 | Polarity judger for solar grid-connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421410U true CN202421410U (en) | 2012-09-05 |
Family
ID=46746162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220050859XU Expired - Fee Related CN202421410U (en) | 2012-02-16 | 2012-02-16 | Polarity judger for solar grid-connected inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202421410U (en) |
-
2012
- 2012-02-16 CN CN201220050859XU patent/CN202421410U/en not_active Expired - Fee Related
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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: 20120905 Termination date: 20200216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |