CN101975930A - Overcurrent detection circuit of solar street lamp - Google Patents
Overcurrent detection circuit of solar street lamp Download PDFInfo
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- CN101975930A CN101975930A CN 201010540864 CN201010540864A CN101975930A CN 101975930 A CN101975930 A CN 101975930A CN 201010540864 CN201010540864 CN 201010540864 CN 201010540864 A CN201010540864 A CN 201010540864A CN 101975930 A CN101975930 A CN 101975930A
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Abstract
The invention relates to an overcurrent detection circuit of a solar street lamp, which is formed by connecting an input/output (I/O) port, a diode D, a triode Q, a comparator O, seven resistors (R1-R7) and two capacitors (C1 and C2). The invention has the advantages that when the load current is in an overcurrent state, the load is switched off, and a load indicating lamp flickers for representing the state; and when the overcurrent state is eliminated, the load automatically returns to the normal state and is switched on, thereby achieving the effect on protecting the circuit. The invention has the characteristics of energy saving, environmental protection and automation.
Description
Technical field
The present invention 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 present invention 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 present invention realizes by following measure:
The over-current detection circuit of solar street light of the present invention 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 invention has the beneficial effects as follows: 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 solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below preferred embodiment of the present invention and conjunction with figs. describes in detail as after.The specific embodiment of the present invention 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 invention.
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 present invention 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 invention 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 invention 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 invention and enforcement according to this for technical conceive of the present invention and characteristics being described, its objective is, can not limit protection scope of the present invention with this.The variation or the modification of every equivalence that the essence of content has been done according to the present invention all should be encompassed in protection scope of the present invention.
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 |
|---|---|---|---|
| CN 201010540864 CN101975930A (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 |
|---|---|---|---|
| CN 201010540864 CN101975930A (en) | 2010-11-11 | 2010-11-11 | Overcurrent detection circuit of solar street lamp |
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| Publication Number | Publication Date |
|---|---|
| CN101975930A true CN101975930A (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010540864 Pending CN101975930A (en) | 2010-11-11 | 2010-11-11 | Overcurrent detection circuit of solar street lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104166033A (en) * | 2013-05-16 | 2014-11-26 | 海洋王（东莞）照明科技有限公司 | Current detection circuit |
| CN105093053A (en) * | 2015-06-26 | 2015-11-25 | 天长市富安电子有限公司 | Current abnormity detection circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329799A (en) * | 1999-05-21 | 2000-11-30 | Harness Syst Tech Res Ltd | Overcurrent detection circuit and cable protection circuit |
| CN201114914Y (en) * | 2007-08-08 | 2008-09-10 | 江苏中澳光伏能源科技有限公司 | An intelligent load detection control device for solar street lamp |
| CN201134958Y (en) * | 2007-12-27 | 2008-10-15 | 深圳市安和威太阳能科技有限公司 | Solar controlling circuit |
| CN201917646U (en) * | 2010-11-11 | 2011-08-03 | 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 CN 201010540864 patent/CN101975930A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329799A (en) * | 1999-05-21 | 2000-11-30 | Harness Syst Tech Res Ltd | Overcurrent detection circuit and cable protection circuit |
| CN201114914Y (en) * | 2007-08-08 | 2008-09-10 | 江苏中澳光伏能源科技有限公司 | An intelligent load detection control device for solar street lamp |
| CN201134958Y (en) * | 2007-12-27 | 2008-10-15 | 深圳市安和威太阳能科技有限公司 | Solar controlling circuit |
| CN201917646U (en) * | 2010-11-11 | 2011-08-03 | 苏州合欣美电子科技有限公司 | Overcurrent detection circuit of solar street lamp |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104166033A (en) * | 2013-05-16 | 2014-11-26 | 海洋王（东莞）照明科技有限公司 | Current detection circuit |
| CN105093053A (en) * | 2015-06-26 | 2015-11-25 | 天长市富安电子有限公司 | Current abnormity detection circuit |
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Application publication date: 20110216 |