CN201917646U - Overcurrent detection circuit of solar street lamp - Google Patents
Overcurrent detection circuit of solar street lamp Download PDFInfo
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- CN201917646U CN201917646U CN2010206028830U CN201020602883U CN201917646U CN 201917646 U CN201917646 U CN 201917646U CN 2010206028830 U CN2010206028830 U CN 2010206028830U CN 201020602883 U CN201020602883 U CN 201020602883U CN 201917646 U CN201917646 U CN 201917646U
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Abstract
The utility model relates to an overcurrent detection circuit of a solar street lamp, which is formed by connecting an input-output port I/O, a diode D, a triode Q, a comparator O, seven resistors (R1-R7), and two capacitors (C1 and C2). The overcurrent detection circuit of the solar street lamp has the beneficial effects as follows: when a load current is over, the overcurrent detection circuit cuts off the load and represents the load in the form of a load indicator lamp; when the overcurrent state is eliminated, the overcurrent detection circuit returns to normal and is automatically switched on through the load to reach the effect of protecting the circuit. The overcurrent detection circuit of the solar street lamp has the characteristics of energy saving, environment protection and automation.
Description
Technical field
The utility model relates to Circuits System, particularly a kind of over-current detection circuit of solar street light.
Background technology
In short supply day by day along with traditional energy, the application of sun power will be more and more widely, and especially field of solar thermal power generation has developed into ripe sunrise industry in short time several years.
At present, solar street light exists lamp power height, many these the three big problems of fast, the no power consumption output of LED light decay, has a strong impact on the problem of street lamp cost and efficient.
The Circuit Matching imperfection of the over-current detection function of solar street light under the prior art.
Based on above reason, invent a kind of over-current detection circuit of simple and effective solar street light, be problem demanding prompt solution in the present technique field.
Summary of the invention
The utility model provides a kind of over-current detection circuit of simple and effective solar street light in order to overcome the deficiency of above technology.
The utility model is realized by following measure:
The over-current detection circuit of solar street light of the present utility model is characterized in that, by an input/output port I/O, diode D, triode Q, comparer O, seven resistance (R1～R7) and two electric capacity (C1, C2) are formed by connecting:
The base stage span connecting resistance R1 of input/output terminal I/O and triode Q;
The base stage of triode Q is connected to the series loop of resistance R 2 and capacitor C 1, the end ground connection that resistance R 2 is connected with capacitor C 1;
No. 1 port of comparer O connects pull-up resistor R5, and No. 1 port of comparer links to each other with No. 2 ports, and No. 2 ports and No. 5 port cross-over connections of comparer have resistance R 6, the parallel circuit that No. 1 port of comparer and No. 5 port cross-over connections have capacitor C 2 and resistance R 7;
No. 3 port span connecting resistance R3 of the collector of triode Q and comparer O, the series circuit of No. 3 ports of comparer and No. 4 port cross-over connection resistance R 4 and diode D1, the negative pole of diode D1 is connected No. 4 ports of comparer O, the positive pole of diode D1 also is connected to supply voltage VCC, No. 5 ports of comparer O are connected the emitter of triode Q, and ground connection.
Preferably, the supply voltage VSS of pull-up resistor R5 is 5V.
Preferably, comparer O No. 1 port is over-current detection point a.
The beneficial effects of the utility model are: I/O is output as high level when input/output port, triode Q1 conducting, sample rate current by over-current detection point a is arranged, No. 1 port to comparer, No. 1 and No. 2 ports comparisons of comparer are arranged again, when overcurrent check point a point electric current is judged as overcurrent greater than certain electric current.
Cut off load when the load current overcurrent, the flicker of load this moment pilot lamp is got rid of when over-current state, recovers normal, recovers to connect load certainly, and the load pilot lamp recovers Chang Liang.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of instructions, below preferred embodiment of the present utility model and conjunction with figs. describes in detail as after.Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the driving circuit schematic diagram of the over-current detection circuit of solar street light of the present utility model.
Among the figure, I/O is that input/output port, D diode, Q triode, O are that comparer, R1～R7 are that resistance, C1, C2 are electric capacity, and a is the over-current detection point.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is made specific description.
The driving circuit schematic diagram of the over-current detection circuit of the solar street light of present embodiment is as shown in drawings:
The over-current detection circuit of solar street light of the present utility model is characterized in that, by an input/output port I/O, diode D, triode Q, comparer O, seven resistance (R1～R7) and two electric capacity (C1, C2) are formed by connecting:
The base stage span connecting resistance R1 of input/output terminal I/O and triode Q;
The base stage of triode Q is connected to the series loop of resistance R 2 and capacitor C 1, the end ground connection that resistance R 2 is connected with capacitor C 1;
No. 1 port of comparer O connects pull-up resistor R5, and No. 1 port of comparer links to each other with No. 2 ports, and No. 2 ports and No. 5 port cross-over connections of comparer have resistance R 6, the parallel circuit that No. 1 port of comparer and No. 5 port cross-over connections have capacitor C 2 and resistance R 7;
No. 3 port span connecting resistance R3 of the collector of triode Q and comparer O, the series circuit of No. 3 ports of comparer and No. 4 port cross-over connection resistance R 4 and diode D1, the negative pole of diode D1 is connected No. 4 ports of comparer O, the positive pole of diode D1 also is connected to supply voltage VCC, No. 5 ports of comparer O are connected the emitter of triode Q, and ground connection.
Preferably, the supply voltage of pull-up resistor R5 is 5V.
Preferably, comparer O No. 1 port is over-current detection point a.
The concrete mode of operation of the over-current detection circuit of solar street light of the present utility model is as follows:
1. circuit is described: when input/output port I/O mouth is output as high level, triode Q1 conducting has the sample rate current by over-current detection point a, to No. 1 port of comparer O, there are No. 1 port and No. 2 ports of comparer O to compare again, when overcurrent check point a electric current is judged as overcurrent greater than certain electric current.
2. current foldback circuit: under the prerequisite of the Rule of judgment that at first satisfies daytime or night, when not connecing load, the load pilot lamp is not worked, load overload (being cut off more than the overcurrent 3A) flicker; It is normal that even load is recovered, and can resume work certainly, and the load pilot lamp returns to Chang Liang; Cut off load when live flows through, the flicker of load this moment pilot lamp is got rid of when over-current state, recovers normal, recovers to connect load certainly, and the load pilot lamp recovers Chang Liang.
The foregoing description just is to allow the one of ordinary skilled in the art can understand content of the present utility model and enforcement according to this for technical conceive of the present utility model and characteristics being described, its objective is, can not limit protection domain of the present utility model with this.The variation or the modification of every equivalence of having done according to the essence of the utility model content all should be encompassed in the protection domain of the present utility model.
Claims (3)
1. the over-current detection circuit of a solar street light is characterized in that, by an input/output port I/O, diode D, triode Q, comparer O, seven resistance (R1～R7) and two electric capacity (C1, C2) are formed by connecting:
The base stage span connecting resistance R1 of input/output terminal I/O and triode Q;
The base stage of triode Q is connected to the series loop of resistance R 2 and capacitor C 1, the end ground connection that resistance R 2 is connected with capacitor C 1;
No. 1 port of comparer O connects pull-up resistor R5, and No. 1 port of comparer links to each other with No. 2 ports, and No. 2 ports and No. 5 port cross-over connections of comparer have resistance R 6, the parallel circuit that No. 1 port of comparer and No. 5 port cross-over connections have capacitor C 2 and resistance R 7;
No. 3 port span connecting resistance R3 of the collector of triode Q and comparer O, the series circuit of No. 3 ports of comparer and No. 4 port cross-over connection resistance R 4 and diode D1, the negative pole of diode D1 is connected No. 4 ports of comparer O, the positive pole of diode D1 also is connected to supply voltage VCC, No. 5 ports of comparer O are connected the emitter of triode Q, and ground connection.
2. the over-current detection circuit of solar street light according to claim 1 is characterized in that, the supply voltage VSS of pull-up resistor R5 is 5V.
3. the over-current detection circuit of solar street light according to claim 1 is characterized in that, No. 1 port of comparer O is an over-current detection point (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206028830U CN201917646U (en) | 2010-11-11 | 2010-11-11 | Overcurrent detection circuit of solar street lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206028830U CN201917646U (en) | 2010-11-11 | 2010-11-11 | Overcurrent detection circuit of solar street lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201917646U true CN201917646U (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206028830U Expired - Fee Related CN201917646U (en) | 2010-11-11 | 2010-11-11 | Overcurrent detection circuit of solar street lamp |
Country Status (1)
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|---|---|
| CN (1) | CN201917646U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975930A (en) * | 2010-11-11 | 2011-02-16 | 苏州合欣美电子科技有限公司 | Overcurrent detection circuit of solar street lamp |
-
2010
- 2010-11-11 CN CN2010206028830U patent/CN201917646U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975930A (en) * | 2010-11-11 | 2011-02-16 | 苏州合欣美电子科技有限公司 | Overcurrent detection circuit of solar street lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20111111 |