CN204495864U - Resistance to voltage protection circuit - Google Patents
Resistance to voltage protection circuit Download PDFInfo
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- CN204495864U CN204495864U CN201520166241.3U CN201520166241U CN204495864U CN 204495864 U CN204495864 U CN 204495864U CN 201520166241 U CN201520166241 U CN 201520166241U CN 204495864 U CN204495864 U CN 204495864U
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- optocoupler
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- voltage protection
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Abstract
The utility model discloses a kind of resistance to voltage protection circuit, comprise triode V1 and optocoupler E1, the input anode of optocoupler E1 is connected with positive source; The input cathode of optocoupler E1 is connected with the c pole of triode V1; The b pole of triode V1 is connected with one end of resistance R1; The other end of resistance R1 is connected with one end of signal output part APCF, electric capacity C1; The other end of electric capacity C1, the e pole of triode V1 are connected with common ground end; The output head anode of optocoupler E1 is the pulse output end of circuit, and the negative pole of output end of optocoupler E1 is connected with common ground end; Resistance to voltage protection circuit also comprises the TVS pipe TVS1 of withstand voltage effect together, and the anode of TVS pipe TVS1 is connected with the negative pole of output end of optocoupler E1, and the negative pole of TVS pipe TVS1 is connected with the output head anode of optocoupler E1.When being subject to extraneous interference and electric voltage exception, this resistance to voltage protection circuit can ensure that instrument exports active reactive pulse normally.
Description
Technical field
The utility model relates to the protection circuit on a kind of electric energy meter, is specifically a kind of resistance to voltage protection circuit exported based on pulse.
Background technology
It is the most basic function of industrial instrumentation (as electric energy meter) that active reactive pulse exports.This instrument holds output meritorious pulse by APCF, makes triode ON, then makes optocoupler conducting, thus realize the output of pulse.The circuit of said structure has the following disadvantages in the use procedure of reality: because the output stage realizing pulse by means of only a triode and an optocoupler is subject to extraneous interference and electric voltage exception, triode and optocoupler are damaged, and then affect the output of active reactive pulse.Therefore, for these reasons, urgently need a kind of resistance to voltage protection circuit exported based on pulse, this resistance to voltage protection circuit can ensure that instrument exports active reactive pulse normally, to solve the problem when being subject to extraneous interference and electric voltage exception.
Utility model content
The technical problems to be solved in the utility model is, provides a kind of resistance to voltage protection circuit, when being subject to extraneous interference and electric voltage exception, this resistance to voltage protection circuit can ensure that instrument exports active reactive pulse normally.
The technical solution of the utility model is, provides a kind of resistance to voltage protection circuit, comprises triode V1 and optocoupler E1, and the input anode of described optocoupler E1 is connected with positive source; The input cathode of described optocoupler E1 is connected with the c pole of triode V1; The b pole of described triode V1 is connected with one end of resistance R1; The other end of described resistance R1 is connected with one end of signal output part APCF, electric capacity C1; The other end of described electric capacity C1, the e pole of triode V1 are connected with common ground end; The output head anode of described optocoupler E1 is the pulse output end of circuit, and the negative pole of output end of described optocoupler E1 is connected with common ground end; Described resistance to voltage protection circuit also comprises the TVS pipe TVS1 of withstand voltage effect together, and the anode of described TVS pipe TVS1 is connected with the negative pole of output end of optocoupler E1, and the negative pole of described TVS pipe TVS1 is connected with the output head anode of optocoupler E1.
Described resistance to voltage protection circuit also comprises an electric capacity C2 strobed, and the two ends of described electric capacity C2 are connected with the output head anode of optocoupler E1, the negative pole of output end of optocoupler E1 respectively.
After adopting above structure, the utility model compared with prior art, has the following advantages:
The resistance to voltage protection circuit of the utility model is in the output terminal of an optocoupler TVS pipe in parallel; this TVS pipe not only plays the effect of switching diode; and the reverse voltage of TVS pipe is greater than 100V; therefore play when there is extraneous interference and electric voltage exception the effect protecting whole circuit, therefore when being subject to extraneous interference and electric voltage exception, the resistance to voltage protection circuit of the utility model can ensure that instrument exports active reactive pulse normally.
As improvement, described resistance to voltage protection circuit also comprises an electric capacity C2 strobed, and the two ends of described electric capacity C2 are connected with the output head anode of optocoupler E1, the negative pole of output end of optocoupler E1 respectively.By electric capacity C2 can effectively filtering by external interference the signal wave that produces, thus ensure by when extraneous interference and electric voltage exception, the resistance to voltage protection circuit of the utility model can ensureing that instrument exports active reactive pulse normally further.
As improvement; described resistance to voltage protection circuit also comprises one and to be connected between positive polarity and optocoupler E1 and the resistance R2 shielded and diode VD1; one end of described resistance R2 is connected with the anode of diode VD1; the other end of described resistance R2 is connected with positive source, and the negative electrode of described diode VD1 is connected with the input anode of optocoupler E1.Can stop voltage effectively by resistance R2 and diode VD1, thus ensure by when extraneous interference and electric voltage exception, the resistance to voltage protection circuit of the utility model can ensureing that instrument exports active reactive pulse normally further.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the resistance to voltage protection circuit of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of resistance to voltage protection circuit of the utility model, comprise triode V1 and optocoupler E1, the input anode of described optocoupler E1 is connected with positive source; The input cathode of described optocoupler E1 is connected with the c pole of triode V1; The b pole of described triode V1 is connected with one end of resistance R1; The other end of described resistance R1 is connected with one end of signal output part APCF, electric capacity C1; The other end of described electric capacity C1, the e pole of triode V1 are connected with common ground end; The output head anode of described optocoupler E1 is the pulse output end of circuit, i.e. Active_P+ end, and the negative pole of output end of described optocoupler E1 is connected with common ground end; Described resistance to voltage protection circuit also comprises the TVS pipe TVS1 of withstand voltage effect together, and the anode of described TVS pipe TVS1 is connected with the negative pole of output end of optocoupler E1, and the negative pole of described TVS pipe TVS1 is connected with the output head anode of optocoupler E1.
Described resistance to voltage protection circuit also comprises an electric capacity C2 strobed, and the two ends of described electric capacity C2 are connected with the output head anode of optocoupler E1, the negative pole of output end of optocoupler E1 respectively.
Described resistance to voltage protection circuit also comprises one and to be connected between positive polarity and optocoupler E1 and the resistance R2 shielded and diode VD1; one end of described resistance R2 is connected with the anode of diode VD1; the other end of described resistance R2 is connected with positive source, and the negative electrode of described diode VD1 is connected with the input anode of optocoupler E1.
During work, export a meritorious pulse by signal output part APCF and make triode V1 conducting, then optocoupler E1 input end conducting and make Active_P+ hold output optocoupler signal.
Below only just most preferred embodiment of the present utility model is described, but can not be interpreted as it is limitations on claims.The utility model is not limited only to above embodiment, and its concrete structure allows to change.In every case the various change done in the protection domain of the utility model independent claims is all in protection domain of the present utility model.
Claims (3)
1. a resistance to voltage protection circuit, comprises triode V1 and optocoupler E1, and the input anode of described optocoupler E1 is connected with positive source; The input cathode of described optocoupler E1 is connected with the c pole of triode V1; The b pole of described triode V1 is connected with one end of resistance R1; The other end of described resistance R1 is connected with one end of signal output part APCF, electric capacity C1; The other end of described electric capacity C1, the e pole of triode V1 are connected with common ground end; The output head anode of described optocoupler E1 is the pulse output end of circuit, and the negative pole of output end of described optocoupler E1 is connected with common ground end; It is characterized in that: described resistance to voltage protection circuit also comprises the TVS pipe TVS1 of withstand voltage effect together, and the anode of described TVS pipe TVS1 is connected with the negative pole of output end of optocoupler E1, and the negative pole of described TVS pipe TVS1 is connected with the output head anode of optocoupler E1.
2. resistance to voltage protection circuit according to claim 1, is characterized in that: described resistance to voltage protection circuit also comprises an electric capacity C2 strobed, and the two ends of described electric capacity C2 are connected with the output head anode of optocoupler E1, the negative pole of output end of optocoupler E1 respectively.
3. resistance to voltage protection circuit according to claim 1; it is characterized in that: described resistance to voltage protection circuit also comprises one and to be connected between positive polarity and optocoupler E1 and the resistance R2 shielded and diode VD1; one end of described resistance R2 is connected with the anode of diode VD1; the other end of described resistance R2 is connected with positive source, and the negative electrode of described diode VD1 is connected with the input anode of optocoupler E1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520166241.3U CN204495864U (en) | 2015-03-24 | 2015-03-24 | Resistance to voltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520166241.3U CN204495864U (en) | 2015-03-24 | 2015-03-24 | Resistance to voltage protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204495864U true CN204495864U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520166241.3U Active CN204495864U (en) | 2015-03-24 | 2015-03-24 | Resistance to voltage protection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959407A (en) * | 2017-03-23 | 2017-07-18 | 北京精雕科技集团有限公司 | It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit |
| CN109560537A (en) * | 2017-09-27 | 2019-04-02 | 深圳光峰科技股份有限公司 | A kind of optocoupler overvoltage crowbar and associated appliance |
| CN116027159A (en) * | 2023-01-30 | 2023-04-28 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
-
2015
- 2015-03-24 CN CN201520166241.3U patent/CN204495864U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959407A (en) * | 2017-03-23 | 2017-07-18 | 北京精雕科技集团有限公司 | It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit |
| CN109560537A (en) * | 2017-09-27 | 2019-04-02 | 深圳光峰科技股份有限公司 | A kind of optocoupler overvoltage crowbar and associated appliance |
| WO2019061824A1 (en) * | 2017-09-27 | 2019-04-04 | 深圳光峰科技股份有限公司 | Optical coupling overvoltage protection circuit and related electrical appliance |
| CN116027159A (en) * | 2023-01-30 | 2023-04-28 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
| CN116027159B (en) * | 2023-01-30 | 2023-08-25 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
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