CN107656121A - A kind of low cost DC voltage isolation picking circuit - Google Patents
A kind of low cost DC voltage isolation picking circuit Download PDFInfo
- Publication number
- CN107656121A CN107656121A CN201711099060.3A CN201711099060A CN107656121A CN 107656121 A CN107656121 A CN 107656121A CN 201711099060 A CN201711099060 A CN 201711099060A CN 107656121 A CN107656121 A CN 107656121A
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- Prior art keywords
- isolation
- circuit
- resistance
- voltage
- amplifier
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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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
- G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The present invention discloses and provides a kind of low cost DC voltage isolation picking circuit, it includes DC voltage importation, resistance mode is depressured part, isolation and amplifier feedback circuit, amplifier Differential input circuit, isolation voltage direct current output part, resistance mode decompression part carries out the input of input isolation and amplifier feedback circuit after decompression pressure limiting to the output end voltage of DC voltage importation, the output end of isolation and amplifier feedback circuit is divided into isolation and amplifier and feedback signal two parts and is connected with amplifier Differential input circuit and isolation voltage direct current output part, DC-isolation voltage is exported by isolation voltage direct current output part.Due to using common double photoelectric isolating circuit and discharge circuit, corresponding feedback circuit is introduced, DC voltage isolation, acquisition function is realized, inputs all the way, do feed back all the way in addition, export corresponding isolated DC voltage.So with the advantages of cost is low and circuit is simple.
Description
Technical field
The present invention relates to DC voltage Acquisition Circuit, more particularly to a kind of low cost DC voltage isolation picking circuit.
Background technology
DC voltage isolation Acquisition Circuit mainly has the following two kinds at present：(1）Linear optical coupling adds isolation DC-DC power source, this
Scheme is to provide isolated from power by linear optical coupling isolation, transmission of analogue signal, the DC-DC of isolation for linear optical coupling；(2）By
ADC special chips, signal, the DC-DC power source of isolated from power composition, this scheme are by special ADC chips collection simulation letter
Number, corresponding analog voltage is being exported by digital isolating chip and power supply.The above two direct current being widely used at present
Pressure isolation Acquisition Circuit, the former adds insulating power supply mode by linear optical coupling, and the latter is using ADC special chips, signal, isolation electricity
Source mode, there is the defects of cost height, circuit complexity in the two.
The content of the invention
The technical problems to be solved by the invention are overcome the deficiencies in the prior art, provide that a kind of cost is low, circuit is simple
DC voltage isolation Acquisition Circuit.
The technical solution adopted in the present invention is：A kind of low cost DC voltage isolation picking circuit, it includes direct current
Importation, resistance mode decompression part, isolation voltage direct current output part are pressed, it also includes isolation and amplifier feedback circuit, fortune
Differential input circuit is put, the DC voltage importation, resistance mode decompression part, isolation and amplifier feedback circuit, amplifier are poor
Input circuit, isolation voltage direct current output part is divided to be sequentially connected electrically, the input connection of the DC voltage importation is not
The DC voltage of ad eundem, the output end of the DC voltage importation connect the resistance mode decompression part, the electricity
Resistance mode be depressured part the output end voltage of the DC voltage importation is carried out input the isolation after decompression pressure limiting it is defeated
Go out the input of feedback circuit, the output end of the isolation and amplifier feedback circuit be divided into isolation and amplifier and feedback signal two parts with
The amplifier Differential input circuit is connected with the isolation voltage direct current output part, by the isolation voltage direct current output portion
Divide output DC-isolation voltage.
The resistance mode decompression portion point includes the 6th resistance, the 7th resistance, and the 6th resistance, the 7th resistant series connect
Connect, the other end of the 6th resistance connects the output end of the DC voltage importation, and the 7th resistance other end connects
This circuit isolation ground terminal is connect, the 6th resistance is connected the defeated of the isolation and amplifier feedback circuit with the 7th resistant series tie point
Enter end.
The isolation and amplifier feedback circuit includes first resistor, 3rd resistor, the 4th resistance, double photoelectric isolating circuits, institute
The one end for stating first resistor is connected with the resistance mode decompression portion split-phase, and the other end of the first resistor connects double light
1st pin of electric isolating circuit, the 2nd pin of double photoelectric isolating circuits connect one end of the 3rd resistor, the 3rd electricity
The other end of resistance connects described circuit isolation ground terminal, and the 3rd resistor is resistance adjustable resistance, double Phototube Coupling electricity
3rd pin on road is connected with the input of the isolation voltage direct current output part, the 4th pin connection of double photoelectric isolating circuits
One end of 4th resistance, the other end of the 4th resistance connect circuit altogether, the 6th pin of double photoelectric isolating circuits
Power vd D, the 5th pin and the 7th pin and the amplifier Differential input circuit of double photoelectric isolating circuits are connected with the 8th pin
Input corresponding points are corresponding to be connected.
The amplifier Differential input circuit include discharge circuit, second resistance, the 5th resistance, the first electric capacity, the second electric capacity,
3rd holds, and the 3rd pin of the discharge circuit connects one end, one end of the second resistance, double light of second electric capacity
7th pin of electric isolating circuit, the 2nd pin of the discharge circuit connect one end of the 3rd electric capacity, the one of the 5th resistance
End, the 5th pin of double photoelectric isolating circuits, one end of first electric capacity, the second resistance, the 5th resistance, the second electricity
Hold, the 3rd other end held connects circuit altogether, the other end of the 1st pin connection first electric capacity of the discharge circuit, institute
The input of isolation voltage direct current output part is stated, the anode of the discharge circuit connects power vd D, the discharge circuit
Negative terminal connection circuit is altogether.
The beneficial effects of the invention are as follows：The present invention it include DC voltage importation, resistance mode decompression part, isolation
Voltage DC output par, c, it also includes isolation and amplifier feedback circuit, amplifier Differential input circuit, the DC voltage input unit
Point, resistance mode decompression part, isolation and amplifier feedback circuit, amplifier Differential input circuit, isolation voltage direct current output part according to
Secondary electrical connection, the input of the DC voltage importation connect different grades of DC voltage, the DC voltage input
Partial output end connects the resistance mode decompression part, and the resistance mode decompression part is to the DC voltage input unit
Point output end voltage input after decompression pressure limiting the input of the isolation and amplifier feedback circuit, the isolation and amplifier feedback
The output end of circuit is divided into isolation and amplifier and feedback signal two parts and the amplifier Differential input circuit and the isolation voltage
Direct current output part is connected, and DC-isolation voltage is exported by the isolation voltage direct current output part.Because the present invention uses
Common double photoelectric isolating circuit and discharge circuit, introduce corresponding feedback circuit, realize DC voltage isolation, acquisition function, one
Road inputs, and does feed back all the way in addition, exports corresponding isolated DC voltage.It is so low simply excellent with circuit with cost
Point.
Brief description of the drawings
Fig. 1 is circuit theory schematic diagram of the present invention.
Embodiment
As shown in figure 1, the present invention it include a kind of low cost DC voltage isolation picking circuit, it including DC voltage it is defeated
Enter part 1, resistance mode decompression part 2, isolation voltage direct current output part 5, it also includes isolation and amplifier feedback circuit 3, fortune
Put Differential input circuit 4, the DC voltage importation 1, resistance mode decompression part 2, isolation and amplifier feedback circuit 3, fortune
Put Differential input circuit 4, isolation voltage direct current output part 5 is sequentially connected electrically, the input of the DC voltage importation 1
Different grades of DC voltage is connected, the output end of the DC voltage importation 1 connects the resistance mode decompression part
2, the resistance mode decompression part 2 inputs after carrying out decompression pressure limiting to the output end voltage of the DC voltage importation 1
The input of the isolation and amplifier feedback circuit 3, the output end of the isolation and amplifier feedback circuit 3 are divided into isolation and amplifier and feedback
Signal two parts are connected with the amplifier Differential input circuit 4 and the isolation voltage direct current output part 5, by the isolation
Voltage DC output par, c 5 exports DC-isolation voltage.
The resistance mode decompression part 2 includes the 6th resistance R6, the 7th resistance R7, the 6th resistance R6, the 7th electricity
Resistance R7 is connected in series, the output end of the other end connection DC voltage importation 1 of the 6th resistance R6, and the described 7th
The resistance R7 other ends connect this circuit isolation ground terminal, the 6th resistance R6 and the 7th resistance R7 be connected in series be connected described in every
From the input of output feedback circuit 3.
The isolation and amplifier feedback circuit 3 includes first resistor R1,3rd resistor R3, the 4th resistance R4, double Phototube Couplings
Circuit OC1, the first resistor R1 one end are connected with resistance mode decompression part 2, and the first resistor R1's is another
One end connects the 1st pin of double photoelectric isolating circuit OC1, the 2nd pin connection the described 3rd of double photoelectric isolating circuit OC1
Resistance R3 one end, the other end of the 3rd resistor R3 connect described circuit isolation ground terminal, and the 3rd resistor R3 is resistance
It is worth adjustable resistance, the 3rd pin of double photoelectric isolating circuit OC1 connects with the input of the isolation voltage direct current output part 5
Connect, the 4th pin of double photoelectric isolating circuit OC1 connects one end of the 4th resistance R4, and the 4th resistance R4's is another
Altogether, the 6th pin of double photoelectric isolating circuit OC1 and the 8th pin connect power vd D, double Phototube Couplings to end connection circuit
Circuit OC1 the 5th pin and the connection corresponding with the input corresponding points of the amplifier Differential input circuit 4 of the 7th pin.
The amplifier Differential input circuit 4 includes discharge circuit U1A, second resistance R2, the 5th resistance R5, the first electric capacity
C1, the second electric capacity C2, the 3rd hold C3, and the 3rd pin of the discharge circuit U1A connects one end of the second electric capacity C2, described the
Two resistance R2 one end, the 7th pin of double photoelectric isolating circuit OC1, the 2nd pin connection described the of the discharge circuit U1A
Three electric capacity C3 one end, one end of the 5th resistance R5, the 5th pin, first electric capacity of double photoelectric isolating circuit OC1
C1 one end, the second resistance R2, the 5th resistance R5, the second electric capacity C2, the 3rd other end for holding C3 connect circuit altogether, institute
State discharge circuit U1A the 1st pin connect the other end of the first electric capacity C1, the isolation voltage direct current output part 5 it is defeated
Enter end, anode connection the power vd D, the discharge circuit U1A of the discharge circuit U1A negative terminal connection circuit are altogether.
In the present embodiment, using common double photoelectric isolating circuit and discharge circuit, corresponding feedback circuit is introduced, is realized straight
Voltage isolation, acquisition function are flowed, inputs all the way, does feed back all the way in addition, export corresponding isolated DC voltage.So have
The advantages of cost is low and circuit is simple.Extensive use can improve operating efficiency and economic benefit.
Claims (4)
1. a kind of low cost DC voltage isolation picking circuit, it includes DC voltage importation（1）, resistance mode decompression portion
Point（2）, isolation voltage direct current output part（5）, it is characterised in that：It also includes isolation and amplifier feedback circuit（3）, amplifier difference
Input circuit（4）, the DC voltage importation（1）, resistance mode decompression part（2）, isolation and amplifier feedback circuit（3）、
Amplifier Differential input circuit（4）, isolation voltage direct current output part（5）It is sequentially connected electrically, the DC voltage importation（1）
Input connect different grades of DC voltage, the DC voltage importation（1）Output end connect the resistive square
Formula is depressured part（2）, the resistance mode decompression part（2）To the DC voltage importation（1）Output end voltage enter
The isolation and amplifier feedback circuit is inputted after row decompression pressure limiting（3）Input, the isolation and amplifier feedback circuit（3）Output
End is divided into isolation and amplifier and feedback signal two parts and the amplifier Differential input circuit（4）With the isolation voltage direct current output
Part（5）It is connected, by the isolation voltage direct current output part（5）Export DC-isolation voltage.
2. low cost DC voltage isolation picking circuit according to claim 1, it is characterised in that：The resistance mode drop
Laminate section（2）Including the 6th resistance（R6）, the 7th resistance（R7）, the 6th resistance（R6）, the 7th resistance（R7）It is connected in series,
6th resistance（R6）The other end connect the DC voltage importation（1）Output end, the 7th resistance（R7）
The other end connects this circuit isolation ground terminal, the 6th resistance（R6）With the 7th resistance（R7）It is connected in series a connection isolation
Export feedback circuit（3）Input.
3. low cost DC voltage isolation picking circuit according to claim 1, it is characterised in that：The isolation and amplifier is anti-
Current feed circuit（3）Including first resistor (R1), 3rd resistor (R3), the 4th resistance (R4), double photoelectric isolating circuits（OC1）, it is described
One end of first resistor (R1) and resistance mode decompression part（2）It is connected, the other end of the first resistor (R1) connects
Connect double photoelectric isolating circuits（OC1）The 1st pin, double photoelectric isolating circuits（OC1）The 2nd pin connection it is described 3rd electricity
The one end of (R3) is hindered, the other end of the 3rd resistor (R3) connects described circuit isolation ground terminal, the 3rd resistor (R3)
For resistance adjustable resistance, double photoelectric isolating circuits（OC1）The 3rd pin and the isolation voltage direct current output part（5）'s
Input connects, double photoelectric isolating circuits（OC1）The 4th pin connect one end of the 4th resistance (R4), the described 4th
The other end of resistance (R4) connects circuit altogether, double photoelectric isolating circuits（OC1）The 6th pin and the 8th pin connection power supply
VDD, double photoelectric isolating circuits（OC1）The 5th pin and the 7th pin and the amplifier Differential input circuit（4）Input pair
Corresponding connection should be put.
4. low cost DC voltage isolation picking circuit according to claim 1, it is characterised in that：The amplifier difference is defeated
Enter circuit（4）Including discharge circuit（U1A）, second resistance（R2）, the 5th resistance（R5）, the first electric capacity（C1）, the second electric capacity
（C2）, the 3rd hold（C3）, the discharge circuit（U1A）The 3rd pin connect second electric capacity（C2）One end, it is described second electricity
Resistance（R2）One end, double photoelectric isolating circuits（OC1）The 7th pin, the discharge circuit（U1A）The 2nd pin connection described in
3rd electric capacity（C3）One end, the 5th resistance（R5）One end, double photoelectric isolating circuits（OC1）The 5th pin, described
First electric capacity（C1）One end, the second resistance（R2）, the 5th resistance（R5）, the second electric capacity（C2）, the 3rd hold（C3）It is another
One end connects circuit altogether, the discharge circuit（U1A）The 1st pin connect first electric capacity（C1）The other end, it is described every
Ionization voltage direct current output part（5）Input, the discharge circuit（U1A）Anode connection power vd D, the amplifier electricity
Road（U1A）Negative terminal connection circuit altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099060.3A CN107656121A (en) | 2017-11-09 | 2017-11-09 | A kind of low cost DC voltage isolation picking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099060.3A CN107656121A (en) | 2017-11-09 | 2017-11-09 | A kind of low cost DC voltage isolation picking circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107656121A true CN107656121A (en) | 2018-02-02 |
Family
ID=61120982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711099060.3A Pending CN107656121A (en) | 2017-11-09 | 2017-11-09 | A kind of low cost DC voltage isolation picking circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107656121A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633250A (en) * | 2018-11-09 | 2019-04-16 | 国网浙江省电力有限公司台州供电公司 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
| CN116148748A (en) * | 2023-04-23 | 2023-05-23 | 常州博瑞电力自动化设备有限公司 | DC voltage divider calibration method and system |
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| CN101924459A (en) * | 2010-07-06 | 2010-12-22 | 浙江大学 | Switching signal interface circuit based on double photoelectric isolation |
| CN102664621A (en) * | 2012-05-25 | 2012-09-12 | 长园深瑞继保自动化有限公司 | Isolation method and circuit for signal acquisition of electronic mutual inductor |
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| CN204613278U (en) * | 2015-03-31 | 2015-09-02 | 安庆富士电梯有限公司 | A kind of voltage acquisition shielding system |
| CN205385471U (en) * | 2016-01-05 | 2016-07-13 | 深圳安科高技术股份有限公司 | DC voltage buffer circuit |
| CN205864388U (en) * | 2016-08-10 | 2017-01-04 | 芜湖远博电子科技有限公司 | A kind of Novel DC voltage isolation circuit |
| CN206272572U (en) * | 2016-11-28 | 2017-06-20 | 中核核电运行管理有限公司 | The high performance signal processing module that nuclear power station reactor core Nuclear measurement system is used |
| JP2017163342A (en) * | 2016-03-09 | 2017-09-14 | ヤマハ株式会社 | Isolation amplifier |
| CN207703924U (en) * | 2017-11-09 | 2018-08-07 | 珠海泰坦科技股份有限公司 | A kind of low cost DC voltage isolation picking circuit |
-
2017
- 2017-11-09 CN CN201711099060.3A patent/CN107656121A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5189307A (en) * | 1992-03-13 | 1993-02-23 | Empi, Inc. | Isolated current mirror with optical insulator generating feedback signal |
| CN101923111A (en) * | 2009-06-11 | 2010-12-22 | 北京中纺锐力机电有限公司 | Isolation detection circuit of DC bus voltage |
| CN101924459A (en) * | 2010-07-06 | 2010-12-22 | 浙江大学 | Switching signal interface circuit based on double photoelectric isolation |
| CN102664621A (en) * | 2012-05-25 | 2012-09-12 | 长园深瑞继保自动化有限公司 | Isolation method and circuit for signal acquisition of electronic mutual inductor |
| CN203519695U (en) * | 2013-09-24 | 2014-04-02 | 国家电网公司 | Isolated direct current voltage acquisition circuit |
| CN204613278U (en) * | 2015-03-31 | 2015-09-02 | 安庆富士电梯有限公司 | A kind of voltage acquisition shielding system |
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| CN205864388U (en) * | 2016-08-10 | 2017-01-04 | 芜湖远博电子科技有限公司 | A kind of Novel DC voltage isolation circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633250A (en) * | 2018-11-09 | 2019-04-16 | 国网浙江省电力有限公司台州供电公司 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
| CN116148748A (en) * | 2023-04-23 | 2023-05-23 | 常州博瑞电力自动化设备有限公司 | DC voltage divider calibration method and system |
| CN116148748B (en) * | 2023-04-23 | 2023-09-29 | 常州博瑞电力自动化设备有限公司 | DC voltage divider calibration method and system |
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