CN205986598U - Keep apart 100KV high accuracy VV transfer circuit - Google Patents
Keep apart 100KV high accuracy VV transfer circuit Download PDFInfo
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- CN205986598U CN205986598U CN201620955643.6U CN201620955643U CN205986598U CN 205986598 U CN205986598 U CN 205986598U CN 201620955643 U CN201620955643 U CN 201620955643U CN 205986598 U CN205986598 U CN 205986598U
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Abstract
The utility model relates to a keep apart 100KV high accuracy VV transfer circuit, including voltage frequency -conversion circuit, high pulse transmission circuit, the frequency of keeping apart the voltage transformation circuit, high keep apart the pulse transmission circuit respectively with the frequency voltage conversion circuit, voltage frequency converting circuit connects. The beneficial effects are that: realize the VV transmission of keeping apart withstand voltage 100KV, reduced interference and the damage of application apparatus to control and monitoring facilities, through adopting subdivision zero set compensation mode, make the signal transmission precision reach 0.01%, the linearity reaches 0.1%, and the off -set voltage is below the 0.001V, having solved the defect that the linearity is poor, the precision low, the off -set voltage is high, having improved the precision of control with the monitoring, especially in keeping apart high voltage power supply, voltage control and high -pressure detection portion have obtained using well.
Description
Technical field
This utility model is related to one kind and is applied in the fields such as analytical tool, computer controls, environmental monitoring, biologic medical
Isolation 100KV high accuracy V/V translation circuit.
Background technology
In high voltage power supply application, high-voltage noise signal easily causes interference to control and monitoring device, more sternly
Even damaging of weight controls and monitoring device, and in order to realize automatically controlling and protecting control device, the isolation transmission of signal is outstanding
For important.At present, the application of isolation V/V translation circuit is more and more extensive, and supertension side apparatus are carried out being accurately controlled sum
Become a big problem, the isolation resistance to pressure request more and more higher of V/V conversion, but a lot of isolation signals transmission on market according to transmission
Circuit, isolation pressure voltage is not high, poor linearity, and offset voltage is high, impact control and monitoring precision, therefore isolation voltage high,
The linearity is good, the low developing direction becoming V/V conversion of offset voltage.
Content of the invention
In view of the conditions of demand of existing market, this utility model provides a kind of small-signal of the pressure 100KV of isolation linearly to pass
Transmission of electricity road, solves poor linearity, precision is low, offset voltage is high defect.
This utility model to achieve these goals, is adopted the technical scheme that：A kind of isolation 100KV high accuracy V/V
Translation circuit it is characterised in that：Including voltage-frequency translation circuit, high isolation pulse transmission circuit, frequency-voltage transformation electricity
Road, described high isolation pulse transmission circuit is connected with frequency-voltage conversion circuit, voltage-frequency converting circuit respectively；
Physical circuit is connected as：In described voltage-frequency converting circuit, input terminal voltage Vi connects electricity respectively by resistance R1
Hold one end, comparator input terminal 7 foot of control chip U1 of C2, the internal timing comparator set of time end 5 of control chip U1
One end of foot difference connecting resistance R2 and electric capacity C3, resistance R5 is in parallel with electric capacity C4, and input positive supply voltage end+Vin1 connects electricity respectively
One end of resistance R5 and R21, one end of electric capacity C1, the other end of resistance R2, power input 8 foot of control chip U1, input is negative
Supply voltage end-Vin1 connects electric capacity C12 and one end of resistance R20 respectively, earth terminal 4 foot of control chip U1 respectively with electric capacity C1
It is connected with the other end of C12 with C2 with C3 and is followed by input ground G1, reference current end 2 foot of control chip U1 passes through resistance R3 and R4
Connect G1, the resistance R7 and electric capacity C5 parallel connection of input ground, current output terminal 1 foot of control chip U1 is connected with threshold value end 6 foot and is followed by electricity
One end of resistance R7, one end of other end difference connecting resistance R6 and R8 of resistance R7, another termination input ground G1 of resistance R6, resistance
One fixing end 1 foot of another termination potentiometer RW1 of R20, another fixing end 2 of another termination potentiometer RW1 of resistance R21
Foot, adjustable end 3 foot of another termination potentiometer RW1 of resistance R8；
In described high isolation pulse transmission circuit, the anode of photoemission cell D1 connects resistance in voltage-frequency converting circuit
The other end of R5, the negative electrode of photoemission cell D1 connects the frequency output terminal 3 of control chip U1 in voltage-frequency converting circuit respectively
Foot, one end of resistance R19, another termination input positive supply voltage end+Vin1 of resistance R19, electric capacity C6 are in parallel with resistance R10,
One end of negative electrode difference connecting resistance R9 and R10 of photoelectric receiving tube D2, the base stage of another termination audion T1 of resistance R10, three
The emitter stage of pole pipe T1 is connected with the other end of resistance R9 and is followed by output ground G2；
In described frequency-voltage transformation circuit, output positive supply voltage end+Vin2 connecting resistance R11 and R12 and R13 respectively
With one end of R14 and electric capacity C9, power input 8 foot of control chip U2, positive power source terminal 7 foot of amplifier U3, potentiometer RW3
Adjustable end 3 foot, in high isolation pulse transmission circuit photoelectric receiving tube D2 anode, another termination output ground G2 of electric capacity C9,
The other end of resistance R11 connect respectively one end of electric capacity C7, in high isolation pulse transmission circuit audion T1 colelctor electrode, control core
The other end of the threshold value end 6 foot difference connecting resistance R12 and electric capacity C7 of piece U2, comparator input terminal 7 foot of control chip U2 is respectively
One end of connecting resistance R15, the other end of resistance R13, internal timing comparator set of time end 5 foot of control chip U2 connects respectively
One end of electric capacity C8, the other end of resistance R14, resistance R15 and the other end of electric capacity C8 are connected and are followed by output ground G2, control chip
Earth terminal 4 foot of U2 is connected with frequency output terminal 3 foot and is followed by output ground G2, and reference current end 2 foot of control chip U2 passes through electricity
Resistance R16 connects a fixing end 1 foot of potentiometer RW2, another fixing end 2 foot of potentiometer RW2 be connected with adjustable end 3 foot be followed by defeated
Go out ground G2, resistance R17 and electric capacity C10 parallel connection, current output terminal 1 foot of control chip U2 connects the homophase input of amplifier U3 respectively
Hold 3 feet, one end of resistance R17, inverting input 2 foot of amplifier U3 be connected with outfan 6 foot after connecting resistance R18 one end,
Electric capacity C11 and diode D3 is in parallel, the negative pole of another terminating diode D3 of resistance R18, and draws as output end vo, resistance
The other end of R17 is connected with the positive pole of diode D3 and is followed by output ground G2, and the negative supply voltage end-Vin2 of output connects amplifier respectively
Negative power end 4 foot of U3, one end of electric capacity C13, zeroing end 1 foot of another termination output ground G2 of electric capacity C13, amplifier U3
Connect a fixing end 1 foot of potentiometer RW3, another zeroing end 8 foot of amplifier U3 connects another fixing end 2 foot of potentiometer RW3.
The beneficial effects of the utility model are：Achieve the V/V transmission isolating pressure 100KV, decrease application apparatus pair
Control the interference with monitoring device and damage；By using subdivision zeroing compensation way, making signal transmission precision reach
0.01%, the linearity reaches 0.1%, and offset voltage is below 0.001V；Solve that poor linearity, precision be low, offset voltage is high
Defect, improves the precision controlling and monitoring, and especially in isolation high voltage power supply, voltage-regulation and high pressure monitoring part obtain
Apply well.
Brief description
Fig. 1 is that circuit of the present utility model connects block diagram；
Fig. 2 is circuit theory diagrams of the present utility model.
Specific embodiment
As shown in Figure 1 and Figure 2, isolate 100KV high accuracy V/V translation circuit, it include voltage-frequency translation circuit, high every
From pulse transmission circuit, frequency-voltage transformation circuit.
High isolation pulse transmission circuit is connected with frequency-voltage conversion circuit, voltage-frequency converting circuit respectively.
In above-mentioned voltage-frequency converting circuit, input terminal voltage Vi connects one end of electric capacity C2, control respectively by resistance R1
Comparator input terminal 7 foot of chip U1, internal timing comparator set of time end 5 foot of control chip U1 respectively connecting resistance R2 and
One end of electric capacity C3, resistance R5 is in parallel with electric capacity C4, one end of input positive supply voltage end+Vin1 difference connecting resistance R5 and R21,
One end of electric capacity C1, the other end of resistance R2, power input 8 foot of control chip U1, the negative supply voltage end-Vin1 of input divides
Do not connect electric capacity C12 and one end of resistance R20, earth terminal 4 foot of control chip U1 is another with electric capacity C1 and C2 and C3 and C12 respectively
One end is connected and is followed by input ground G1, and reference current end 2 foot of control chip U1 meets input ground G1, resistance R7 by resistance R3 and R4
In parallel with electric capacity C5, current output terminal 1 foot of control chip U1 is connected with threshold value end 6 foot one end of connecting resistance R7 afterwards, resistance R7
The other end respectively connecting resistance R6 and R8 one end, another termination input ground G1 of resistance R6, another termination current potential of resistance R20
One fixing end 1 foot of device RW1, another fixing end 2 foot of another termination potentiometer RW1 of resistance R21, another termination of resistance R8
Adjustable end 3 foot of potentiometer RW1.
In above-mentioned high isolation pulse transmission circuit, the anode of photoemission cell D1 connects resistance in voltage-frequency converting circuit
The other end of R5, the negative electrode of photoemission cell D1 connects the frequency output terminal 3 of control chip U1 in voltage-frequency converting circuit respectively
Foot, one end of resistance R19, another termination input positive supply voltage end+Vin1 of resistance R19, electric capacity C6 are in parallel with resistance R10,
One end of negative electrode difference connecting resistance R9 and R10 of photoelectric receiving tube D2, the base stage of another termination audion T1 of resistance R10, three
The emitter stage of pole pipe T1 is connected with the other end of resistance R9 and is followed by output ground G2.
In said frequencies-voltage conversion circuit, output positive supply voltage end+Vin2 connecting resistance R11 and R12 and R13 respectively
With one end of R14 and electric capacity C9, power input 8 foot of control chip U2, positive power source terminal 7 foot of amplifier U3, potentiometer RW3
Adjustable end 3 foot, in high isolation pulse transmission circuit photoelectric receiving tube D2 anode, another termination output ground G2 of electric capacity C9,
The other end of resistance R11 connect respectively one end of electric capacity C7, in high isolation pulse transmission circuit audion T1 colelctor electrode, control core
The other end of the threshold value end 6 foot difference connecting resistance R12 and electric capacity C7 of piece U2, comparator input terminal 7 foot of control chip U2 is respectively
One end of connecting resistance R15, the other end of resistance R13, internal timing comparator set of time end 5 foot of control chip U2 connects respectively
One end of electric capacity C8, the other end of resistance R14, resistance R15 and the other end of electric capacity C8 are connected and are followed by output ground G2, control chip
Earth terminal 4 foot of U2 is connected with frequency output terminal 3 foot and is followed by output ground G2, and reference current end 2 foot of control chip U2 passes through electricity
Resistance R16 connects a fixing end 1 foot of potentiometer RW2, another fixing end 2 foot of potentiometer RW2 be connected with adjustable end 3 foot be followed by defeated
Go out ground G2, resistance R17 and electric capacity C10 parallel connection, current output terminal 1 foot of control chip U2 connects the homophase input of amplifier U3 respectively
Hold 3 feet, one end of resistance R17, inverting input 2 foot of amplifier U3 be connected with outfan 6 foot after connecting resistance R18 one end,
Electric capacity C11 and diode D3 is in parallel, the negative pole of another terminating diode D3 of resistance R18, and draws as output end vo, resistance
The other end of R17 is connected with the positive pole of diode D3 and is followed by output ground G2, and the negative supply voltage end-Vin2 of output connects amplifier respectively
Negative power end 4 foot of U3, one end of electric capacity C13, zeroing end 1 foot of another termination output ground G2 of electric capacity C13, amplifier U3
Connect a fixing end 1 foot of potentiometer RW3, another zeroing end 8 foot of amplifier U3 connects another fixing end 2 foot of potentiometer RW3.
The model of chip U1, U2：LM331；The model of chip U3：OP07.
It is contemplated that the precision of voltage and frequency conversion and degree of stability in voltage-frequency converting circuit, electric capacity C3 adopts NPO
Material, stable and reliable for performance.RW1 is that the linearity adjusts resistance, in order to ensure that degree of regulation resistance RW1 selects multiturn potentiometer,
Transmitting tube should select the good device of light sensitive characteristic.
It is contemplated that the precision of frequency and voltage conversion and degree of stability in frequency-voltage conversion circuit, electric capacity C8 adopts NPO
Material, stable and reliable for performance.In order to ensure that the accuracy of frequency signal transmission, luminous tube and reception pipe should be close with insulation tube
Envelope.In view of design of Reducing Rating, the pressure voltage of insulation tube should carry out 120KV test.
RW3 is zero compensation regulator potentiometer, in order to ensure that degree of regulation selects multiturn potentiometer.
In PCB design layout it is contemplated that input is pressure with the height insulation of outfan, input is had this circuit with outfan
Certain space length, reduces high pressure interference, to ensure the reliability of circuit work.
Operation principle
In voltage-frequency conversion circuit, 5 feet of control chip U1 are the set of time end of internal timing comparator, regularly
Time depends on resistance R3 and electric capacity C2.Analogue signal inputs from Vi, after the input filter through resistance R1 and electric capacity C3 composition, send
To in-phase end 7 foot of the inside input comparator of control chip U1, according to the change of above-mentioned two comparator input terminal voltage, week
The upset of the control internal trigger of phase property, and the pulse side of the frequency output terminal 3 foot output certain frequency in control chip U1
Ripple, and the linearity of low end frequency signal can be adjusted by regulator potentiometer RW1.
In high isolation pulse transmission circuit and frequency voltage converter circuit, 5 feet of control chip U2 are internal timing ratio
Compared with the set of time end of device, timing depends on resistance R16 and electric capacity C7.One coming from photoelectric receiving tube D2 isolated transmission
Determine the pulse signal of frequency, the peaker through resistance R12 and electric capacity C6 composition, the spike of generation is added to control chip U2's
Threshold value end 6 foot, i.e. the end of oppisite phase of the internal input comparator of chip U2.Through internal each Absent measures, in the electricity of control chip U2
Stream outfan 1 foot obtains charge accumulated, and pulse frequency is higher, and the voltage on electric capacity C10 is higher.The analog voltage obtaining, and warp
Cross the follower of high-precision amplifying U3 composition, finally revert back and input analog voltage identical voltage.Become for improving output
Change precision, reduce non-linear distortion, using chip OP07, carry out exporting zero compensation by regulator potentiometer RW3, so that input is lost
Voltage is adjusted to be preferably minimized；By regulator potentiometer RW2, improve the corresponding precision of output voltage and input voltage.
Claims (1)
1. a kind of isolation 100KV high accuracy V/V translation circuit it is characterised in that：Including voltage-frequency translation circuit, high isolation
Pulse transmission circuit, frequency-voltage transformation circuit, described high isolation pulse transmission circuit respectively with frequency-voltage conversion circuit,
Voltage-frequency converting circuit connects；
Physical circuit is connected as：In described voltage-frequency converting circuit, input terminal voltage Vi meets electric capacity C2 respectively by resistance R1
One end, comparator input terminal 7 foot of control chip U1, internal timing comparator set of time end 5 foot of control chip U1 divides
One end of other connecting resistance R2 and electric capacity C3, resistance R5 is in parallel with electric capacity C4, input positive supply voltage end+Vin1 connecting resistance R5 respectively
With one end of R21, one end of electric capacity C1, the other end of resistance R2, control chip U1 power input 8 foot, the negative power supply of input
Voltage end-Vin1 connects electric capacity C12 and one end of resistance R20 respectively, earth terminal 4 foot of control chip U1 respectively with electric capacity C1 and C2
It is connected with the other end of C3 with C12 and is followed by input ground G1, reference current end 2 foot of control chip U1 is connect by resistance R3 and R4 defeated
Enter ground G1, resistance R7 and electric capacity C5 in parallel, current output terminal 1 foot of control chip U1 is connected with threshold value end 6 foot connecting resistance R7 afterwards
One end, one end of the other end of resistance R7 connecting resistance R6 and R8 respectively, another termination input the ground G1, resistance R20 of resistance R6
Another termination potentiometer RW1 a fixing end 1 foot, another fixing end 2 foot of another termination potentiometer RW1 of resistance R21, electricity
Adjustable end 3 foot of another termination potentiometer RW1 of resistance R8；
In described high isolation pulse transmission circuit, the anode of photoemission cell D1 meets resistance R5 in voltage-frequency converting circuit
The other end, the negative electrode of photoemission cell D1 connect respectively frequency output terminal 3 foot of control chip U1 in voltage-frequency converting circuit,
One end of resistance R19, another termination input positive supply voltage end+Vin1 of resistance R19, electric capacity C6 are in parallel with resistance R10, photoelectricity
One end of negative electrode difference connecting resistance R9 and R10 of reception pipe D2, the base stage of another termination audion T1 of resistance R10, audion
The emitter stage of T1 is connected with the other end of resistance R9 and is followed by output ground G2；
In described frequency-voltage transformation circuit, output positive supply voltage end+Vin2 connecting resistance R11 and R12 and R13 and R14 respectively
With one end of electric capacity C9, power input 8 foot of control chip U2, positive power source terminal 7 foot of amplifier U3, potentiometer RW3 can
Adjust the anode of photoelectric receiving tube D2 in end 3 foot, high isolation pulse transmission circuit, another termination output ground G2 of electric capacity C9, resistance
The other end of R11 connect respectively one end of electric capacity C7, in high isolation pulse transmission circuit audion T1 colelctor electrode, control chip U2
Threshold value end 6 foot connecting resistance R12 and electric capacity C7 respectively the other end, comparator input terminal 7 foot of control chip U2 connects electricity respectively
One end of resistance R15, the other end of resistance R13, internal timing comparator set of time end 5 foot of control chip U2 connects electric capacity respectively
One end of C8, the other end of resistance R14, resistance R15 and the other end of electric capacity C8 are connected and are followed by output ground G2, control chip U2's
Earth terminal 4 foot is connected with frequency output terminal 3 foot and is followed by output ground G2, and reference current end 2 foot of control chip U2 passes through resistance R16
Connect a fixing end 1 foot of potentiometer RW2, another fixing end 2 foot of potentiometer RW2 is connected with adjustable end 3 foot and is followed by output ground G2,
Resistance R17 and electric capacity C10 are in parallel, current output terminal 1 foot of control chip U2 connect respectively in-phase input end 3 foot of amplifier U3,
One end of resistance R17, inverting input 2 foot of amplifier U3 be connected with outfan 6 foot after connecting resistance R18 one end, electric capacity C11
In parallel, the negative pole of another terminating diode D3 of resistance R18 with diode D3, and draw as output end vo, resistance R17's is another
One end is connected with the positive pole of diode D3 and is followed by output ground G2, and the negative supply voltage end-Vin2 of output connects the negative of amplifier U3 respectively
Power end 4 foot, one end of electric capacity C13, zeroing end 1 foot of another termination output ground G2 of electric capacity C13, amplifier U3 connects current potential
One fixing end 1 foot of device RW3, another zeroing end 8 foot of amplifier U3 connects another fixing end 2 foot of potentiometer RW3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620955643.6U CN205986598U (en) | 2016-08-28 | 2016-08-28 | Keep apart 100KV high accuracy VV transfer circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620955643.6U CN205986598U (en) | 2016-08-28 | 2016-08-28 | Keep apart 100KV high accuracy VV transfer circuit |
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| CN205986598U true CN205986598U (en) | 2017-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160422A (en) * | 2016-08-28 | 2016-11-23 | 东文高压电源（天津）股份有限公司 | A kind of isolation 100KV high accuracy V/V translation circuit |
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2016
- 2016-08-28 CN CN201620955643.6U patent/CN205986598U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160422A (en) * | 2016-08-28 | 2016-11-23 | 东文高压电源（天津）股份有限公司 | A kind of isolation 100KV high accuracy V/V translation circuit |
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