CN109061279A - Alternating current sampling circuit - Google Patents
Alternating current sampling circuit Download PDFInfo
- Publication number
- CN109061279A CN109061279A CN201810795830.6A CN201810795830A CN109061279A CN 109061279 A CN109061279 A CN 109061279A CN 201810795830 A CN201810795830 A CN 201810795830A CN 109061279 A CN109061279 A CN 109061279A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- resistance
- output
- capacitor
- Prior art date
- 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.)
- Granted
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 59
- 230000005611 electricity Effects 0.000 claims description 11
- 230000003111 delayed effect Effects 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a kind of alternating current sampling circuit, including exchange input, Width funtion conversion circuit, rectification are lifted circuit, voltage amplifier circuit, filtering wave by prolonging time and follow circuit, output protection circuit and voltage output.The wide range AC voltage of exchange input or alternating current are converted into small range alternating current reconvert into small range alternating voltage by Width funtion conversion circuit; small range alternating voltage is converted into a certain range of DC voltage by rectification lifting circuit and is sent into voltage amplifier circuit; DC voltage is mutually amplified together by voltage amplifier circuit and exports sampled voltage; improve the sample range of alternating voltage, and by filtering wave by prolonging time follow circuit and output protection circuit ensure that sampled voltage accuracy accuracy and stability.The advantages that present invention has circuit connection simple, and strong antijamming capability, input voltage range is wide, and sample circuit is stablized, accuracy is high, and voltage output range is adjustable.
Description
Technical field
The present invention relates to power electronics fields, relate in particular to a kind of alternating current sampling circuit.
Background technique
Since the direction of alternating voltage and amplitude constantly change at any time, when being sampled to alternating voltage typically directly
High-voltage value is changed into low voltage value, alternating voltage sample range is small, while carrying out the sampling of alternating voltage and phase, leads to institute
The alternating voltage error of sampling is larger.And after using rectifier diode to carry out ac voltage rectifier, cooperate zero passage detection alternating current
The method of pressure and phase sample, needs to connect biggish load after rectification, while to will lead to voltage whole for the pressure drop of rectifier diode
Zero point can not be reached after stream, so that the precision of alternating voltage sampling reduces.
Summary of the invention
Small in order to solve alternating voltage or alternating current sample range, sampling error is big and the lower technology of sampling precision is asked
Topic, the present invention propose a kind of alternating current sampling circuit.
The technical scheme of the present invention is realized as follows:
A kind of alternating current sampling circuit, including the wide range AC voltage or wide scope alternating current for will be inputted from exchange
Stream be first converted into small range alternating current reconvert at the Width funtion conversion circuit of small range alternating voltage, for small range to be handed over
Galvanic electricity pressure is converted into the rectification lifting circuit of a certain range of DC voltage, for mutually amplifying together to DC voltage and exporting sampling
The voltage amplifier circuit of voltage, for be delayed, filtered and followed to sampled voltage the filtering wave by prolonging time of processing follow circuit, use
It is connected in the output protection circuit for carrying out output protection processing to sampled voltage and with the output end of the output protection circuit
Voltage output.
Further, the Width funtion conversion circuit is used to be first converted into from the wide range AC voltage of exchange input
Small range alternating current reconvert includes first resistor, mutual induction of voltage at small range alternating voltage, the Width funtion conversion circuit
Device and second resistance, the first resistor is series between the exchange input and the primary side of the voltage transformer, described
After the secondary side of voltage transformer is in parallel with the second resistance as the output end of the Width funtion conversion circuit with it is described whole
The input terminal of stream lifting circuit is connected.
Further, the Width funtion conversion circuit is used to be first converted into from the wide scope alternating current of exchange input
Small range alternating current reconvert includes first resistor, Current Mutual Inductance at small range alternating voltage, the Width funtion conversion circuit
Device and second resistance, the first resistor is series between the exchange input and the primary side of the current transformer, described
After the secondary side of current transformer is in parallel with the second resistance as the output end of the Width funtion conversion circuit with it is described whole
The input terminal of stream lifting circuit is connected.
Further, the rectification lifting circuit includes first capacitor, 3rd resistor and the 4th resistance, the 3rd resistor
One end is connected with described 4th resistance one end, another termination power of 3rd resistor, the other end ground connection of the 4th resistance,
The forward end of the first capacitor is connected with the 3rd resistor and the 4th resistance series connection midpoint, and intersection point is as described whole
The output end of stream lifting circuit is connected with the input terminal of the voltage amplifier circuit, and the negative end of the first capacitor is as institute
The input terminal for stating rectification lifting circuit is connected with the output end of the Width funtion conversion circuit.
Further, the voltage amplifier circuit includes the first operational amplifier, the 5th resistance, the 6th resistance, and described the
The reverse side of one operational amplifier is connected with described 5th resistance one end and described 6th resistance one end, the 5th resistance
The other end of other end ground connection, the 6th resistance is grounded and is connected with the output end of first operational amplifier, described
The positive terminal of first operational amplifier is as the input terminal of the voltage amplifier circuit and the output end of the rectification lifting circuit
Be connected, the output end of first operational amplifier as the voltage amplifier circuit output end and the filtering wave by prolonging time with
It is connected with the input terminal of circuit.
Further, the voltage amplifier circuit further includes the second capacitor, third capacitor and the 7th resistance, second electricity
Appearance is series between the other end and ground of the 5th resistance, and the third capacitor is series at the other end and ground of the 6th resistance
Between, described 7th resistance one end is connected with the output end of first operational amplifier, the other end conduct of the 7th resistance
The output end of the voltage amplifier circuit.
Further, the filtering wave by prolonging time follows circuit to include delay circuit, filter circuit and follow circuit, the delay
The input terminal of circuit follows the input terminal of circuit and the output end of the voltage amplifier circuit to be connected as the filtering wave by prolonging time,
The output end of the delay circuit is connected with the input terminal of the filter circuit, the output end of the filter circuit and it is described with
It is connected with the input terminal of circuit, the output end for following circuit follows output end and the institute of circuit as the filtering wave by prolonging time
The input terminal for stating output protection circuit is connected.
Further, the delay circuit includes the 8th resistance and the 4th capacitor, and the filter circuit includes the 9th resistance
With the 5th capacitor, described to follow circuit include second operational amplifier, described 8th resistance one end and described 4th capacitor one end
Series connection, the 8th resistance other end ground connection, the output end phase of the 4th capacitor other end and the second operational amplifier
Connection, one end of the 9th resistance are connected with the concatenated intersection point in described 8th resistance one end and described 4th capacitor one end,
The other end of 9th resistance is connected with the forward end of the second operational amplifier and described 5th capacitor one end, described
The other end of 5th capacitor is grounded, the output end phase of the backward end of the second operational amplifier and the second operational amplifier
Connection, the output end of the second operational amplifier are the output end for following circuit, described 8th resistance one end and described
The 4th concatenated intersection point in capacitor one end is the input terminal of the delay circuit.
Further, the output protection circuit includes the tenth resistance, the first switch diode, two pole of second switch
Pipe, the anode of the first switch diode are connected with the cathode of the second switch diode, the first switch diode
Cathode access circuit common ground end voltage, the plus earth of the second switch diode, one end of the tenth resistance
Input terminal as the output protection circuit follows the output end of circuit to be connected with the filtering wave by prolonging time, the tenth resistance
The other end be connected with the anode of the first switch diode with the concatenated intersection point of cathode of the second switch diode,
The other end of tenth resistance is connected as the output end of the output protection circuit with the voltage output.
Further, the output protection circuit further includes eleventh resistor and the 6th capacitor, the eleventh resistor string
It is coupled between the other end and the voltage output of the tenth resistance, one end access of the 6th capacitor the 11st electricity
Between resistance and the voltage output, the other end of the 6th capacitor is grounded.
The beneficial effects of the present invention are: the present invention provides a kind of alternating current sampling circuit, first passing through Width funtion conversion circuit will
Wide range AC voltage or wide scope alternating current are converted into small range alternating current reconvert into small range alternating voltage, and send
Enter rectification lifting circuit, small range alternating voltage is then converted into simultaneously by a certain range of DC voltage by rectification lifting circuit
It is sent into voltage amplifier circuit, finally, improving to DC voltage with mutually amplifying and exporting sampled voltage by voltage amplifier circuit
The sample range of alternating voltage, and by voltage amplifier circuit and following and designing delay circuit and filter circuit between circuit,
The accuracy and stability that ensure that the accuracy of sampled voltage carry out output protection to sampled voltage by output protection circuit
Processing ensure that the stabilization of sampled voltage output is accurate.Therefore, the present invention has circuit connection simple, strong antijamming capability, electricity
The advantages that pressure input range is wide, and sample circuit is stablized, accuracy is high, and voltage output range is adjustable.
Detailed description of the invention
Fig. 1 is the circuit diagram for the alternating current sampling circuit that present invention exchange input is alternating voltage；
Fig. 2 is the circuit diagram for the alternating current sampling circuit that present invention exchange input is alternating current.
Specific embodiment
In order to be more clearly understood that technology contents of the invention, spy lifts following embodiment and is described in detail, and purpose is only
It is to be best understood from the protection scope that the contents of the present invention are not intended to limit the present invention.Each component part in the structure of embodiment attached drawing
It is not scaled by normal rates, therefore does not represent the practical relative size of each structure in embodiment.Wherein described structure or face is upper
Face or upside include intermediate the case where there are also other layer.
Embodiment 1
As shown in Figure 1, a kind of alternating current sampling circuit, including for the wide range AC voltage from exchange input first to be turned
Change into small range alternating current reconvert at the Width funtion conversion circuit of small range alternating voltage, for by small range alternating voltage
It is converted into the rectification lifting circuit of a certain range of DC voltage, for mutually amplifying together to DC voltage and exporting sampled voltage
Voltage amplifier circuit, for being delayed, being filtered and being followed the filtering wave by prolonging time of processing to follow circuit, for adopting to sampled voltage
The voltage that sample voltage carries out the output protection circuit of output protection processing and is connected with the output end of the output protection circuit
Output.
Width funtion conversion circuit is used to that small range exchange will to be first converted into from the wide range AC voltage of exchange input Ui
Electric current reconvert is at small range alternating voltage, to improve the sample range of voltage, it is preferred that referring to Fig. 1, the Width funtion conversion
Circuit includes that first resistor R1, voltage transformer T1 and second resistance R2, the first resistor R1 are series at the exchange input
Between Ui and the primary side of the voltage transformer T1, the secondary side of the voltage transformer T1 is in parallel with the second resistance R2
It is connected afterwards as the output end of the Width funtion conversion circuit with the input terminal of the rectification lifting circuit.More preferably, voltage
Mutual inductor T1 is a kind of current mode mutual inductor, and first resistor R1 is precision resister, and second resistance R2 is precision resister；This
Sample, alternating voltage input Ui are connect with first resistor R1, and wide range AC voltage value can be changed into small range AC current values,
And input voltage mutual inductor primary side, voltage transformer secondary side are connected with second resistance R2, it can be by small range alternating current
Value is converted into small range ac voltage, so that alternating current sampling circuit is applicable in the alternating voltage input of wider range, to improve
The sample range of voltage.In above preferred embodiment, Width funtion conversion circuit includes first resistor R1, voltage transformer T1 and
Two resistance R2, but not limited to this, the circuit of phase same-action can also be designed, to realize the wide scope from exchange input Ui
Alternating voltage is first converted into small range alternating current reconvert into the function of small range alternating voltage.
Rectification lifting circuit is used to small range alternating voltage being converted into a certain range of DC voltage, to guarantee sampling essence
Degree, it is preferred that referring to Fig. 1, it includes first capacitor C1,3rd resistor R3 and the 4th resistance R4 that the rectification, which is lifted circuit, described
3rd resistor one end is connected with described 4th resistance one end, another termination power VCC of 3rd resistor, the 4th resistance
Other end ground connection, the forward end of the first capacitor are connected with the 3rd resistor and the 4th resistance series connection midpoint, hand over
Point is connected as the output end of the rectification lifting circuit with the input terminal of the voltage amplifier circuit, the first capacitor
Negative end is connected as the input terminal of the rectification lifting circuit with the output end of the Width funtion conversion circuit.Wherein first
Capacitor C1 is commutation capacitor, for example is a kind of tantalum capacitor, and 3rd resistor and the series connection of the 4th resistance divide power supply VCC, in this way, can
Alternating voltage is changed into a certain range of DC voltage value, to ensure that sampling precision.In above preferred embodiment, rectification
Lifting circuit includes first capacitor C1,3rd resistor R3 and the 4th resistance R4, but not limited to this, it can also design according to actual needs
Small range alternating voltage, is converted into the function of a certain range of DC voltage by the circuit of phase same-action.
Voltage amplifier circuit is used to mutually amplify DC voltage together and exports sampled voltage, it is preferred that described referring to Fig. 1
Voltage amplifier circuit include the first operational amplifier U1, the 5th resistance R5, the 6th resistance R6, first operational amplifier it is anti-
5th resistance one end and described 6th resistance one end described in Xiang Duanyu are connected, the other end ground connection of the 5th resistance, described
The other end of 6th resistance is grounded and is connected with the output end of first operational amplifier, first operational amplifier
Positive terminal is connected as the input terminal of the voltage amplifier circuit with the output end of the rectification lifting circuit, first fortune
The output end for calculating amplifier follows with the filtering wave by prolonging time input terminal phase of circuit as the output end of the voltage amplifier circuit
Connection.As a kind of preferred embodiment, above-mentioned voltage amplifier circuit includes the first operational amplifier U1, the 5th resistance R5, the 6th
Resistance R6, but not limited to this, the circuit of phase same-action can also be designed according to actual needs, with to DC voltage with mutually amplification and it is defeated
Sampled voltage out.For example, it is furthermore preferred that the voltage amplifier circuit further includes the second capacitor C2, third capacitor C3 and the 7th electricity
R7 is hindered, second capacitor is series between the other end and ground of the 5th resistance, and the third capacitor is series at the 6th electricity
Between the other end and ground of resistance, described 7th resistance one end is connected with the output end of first operational amplifier, and the described 7th
Output end of the other end of resistance as the voltage amplifier circuit.Wherein, the second capacitor C2, third capacitor C3 play filtering and make
With the 7th resistance R7 plays the role of adjusting input impedance in circuit.
Filtering wave by prolonging time follows circuit for being delayed, being filtered and with everywhere to the sampled voltage that voltage amplifier circuit exports
Reason, it is preferred that referring to Fig. 1, the filtering wave by prolonging time follows circuit to include delay circuit, filter circuit and follow circuit, described to prolong
When circuit input terminal follow the input terminal of circuit and the output end of the voltage amplifier circuit to be connected as the filtering wave by prolonging time
It connects, the output end of the delay circuit is connected with the input terminal of the filter circuit, the output end of the filter circuit and institute
It states and the input terminal of circuit is followed to be connected, the output end for following circuit follows the output end of circuit as the filtering wave by prolonging time
It is connected with the input terminal of the output protection circuit.Preferably, the delay circuit includes the 8th resistance R8 and the 4th capacitor
C4, the filter circuit include the 9th resistance R9 and the 5th capacitor C5, and described to follow circuit include second operational amplifier U2, institute
It states the 8th resistance one end to connect with described 4th capacitor one end, the 8th resistance other end ground connection, the 4th capacitor is another
End is connected with the output end of the second operational amplifier, one end of the 9th resistance and described 8th resistance one end and institute
It states the 4th concatenated intersection point in capacitor one end to be connected, the other end of the 9th resistance and the forward direction of the second operational amplifier
End and described 5th capacitor one end are connected, the other end of the 5th capacitor ground connection, the second operational amplifier it is reversed
End is connected with the output end of the second operational amplifier, and the output end of the second operational amplifier follows circuit to be described
Output end, described 8th resistance one end and the concatenated intersection point in described 4th capacitor one end are the input terminal of the delay circuit.
In this way, in voltage amplifier circuit and following design delay circuit and filter circuit between circuit, the accurate of sampled voltage ensure that
The accuracy and stability of degree.
Output protection circuit is used to carry out output protection processing to sampled voltage, to guarantee that stablizing for sampled voltage output is smart
Really.Preferably, referring to Fig. 1, the output protection circuit is opened including the tenth resistance R10, the first switch diode D1, second
Diode D2 is closed, the anode of the first switch diode D1 connects with the cathode of the second switch diode D2, and described the
The cathode of one switching diode accesses circuit common ground end voltage VSS, and the plus earth of the second switch diode is described
One end of tenth resistance follows the output end of circuit to be connected as the input terminal of the output protection circuit with the filtering wave by prolonging time
It connects, the yin of the anode and the second switch diode D2 of the other end of the tenth resistance and the first switch diode D1
Extremely concatenated intersection point is connected, output end and the voltage of the other end of the tenth resistance as the output protection circuit
Output is connected.Output protection circuit further includes eleventh resistor R11 and the 6th capacitor C6, and the eleventh resistor is series at institute
It states between the other end and the voltage output of the tenth resistance, the eleventh resistor and institute are accessed in one end of the 6th capacitor
It states between voltage output, the other end ground connection of the 6th capacitor.Wherein, first switch diode D1, second switch diode
D2 plays the role of protecting output voltage in circuit, and the tenth resistance R10 is to adjust input impedance in circuit, and the 11st
Resistance R11, the 6th capacitor C6 form filter circuit, play output voltage filter action, guarantee that the stabilization of output voltage is accurate.
The exchange input of alternating current sampling circuit is alternating voltage, technical principle in the present embodiment are as follows:
Alternating voltage input Ui is connect with first resistor R1, and wide range AC voltage value is changed into small range AC current values
And input voltage mutual inductor T1 primary side, peak current value i can be calculated by following formula 1:
Voltage transformer T1 secondary side is connected with second resistance R2, and small range AC current values are converted into small range and are handed over
Voltage value is flowed, crest voltage U1 can be calculated by following formula 2 are as follows:
U1=i*R2 (2)
The small range alternating voltage of voltage transformer secondary side output is after over commutation is lifted circuit and voltage amplifier circuit
Sample voltage value is exported, sample voltage value range U2 is exported are as follows:
Delay circuit and filter circuit are in amplifying circuit and follow between circuit, are delayed, are filtered and are followed processing,
Output voltage U range are as follows: U=U2。
It follows that the range of output voltage U depends on first resistor R1, second resistance R2,3rd resistor R3, the 4th electricity
R4, the 5th resistance R5 and first resistor R6 are hindered, is increased compared to conventional AC voltage using circuit sampling range.
Embodiment 2
Above-described embodiment 1 is a kind of alternating current sampling circuit for exchanging and inputting as alternating voltage, and the present embodiment 2 is to exchange
On the basis of input is the alternating current sampling circuit of alternating voltage, above-mentioned voltage transformer T1 is changed into current transformer T11, formed
A kind of exchange input be alternating current alternating current sampling circuit, referring to fig. 2, if current transformer ratio be n:m, input hand over
Galvanic electricity stream i, can calculate the range of output voltage U are as follows:
To sum up, the invention proposes a kind of alternating current sampling circuit, including exchange input, Width funtion conversion circuit, rectification lifts
Circuit, voltage amplifier circuit, delay circuit are risen, filter circuit follows circuit, output protection circuit and voltage output.Firstly, logical
The wide range AC voltage of exchange input or wide scope alternating current are converted into small range alternating current by wide voltage conversion circuit
Reconvert is flowed into small range alternating voltage, and is sent into rectification lifting circuit, is then exchanged small range by rectification lifting circuit
Voltage is converted into a certain range of DC voltage and is sent into voltage amplifier circuit, finally, by voltage amplifier circuit to direct current
Pressure is with mutually amplifying and export sampled voltage, in this way, improve the sample range of alternating voltage, and by voltage amplifier circuit and
It follows and designs delay circuit and filter circuit between circuit, ensure that the accuracy and stability of the accuracy of sampled voltage, lead to
It crosses output protection circuit and output protection processing is carried out to sampled voltage, ensure that the stabilization of sampled voltage output is accurate.Therefore, originally
Invention has circuit connection simple, and strong antijamming capability, input voltage range is wide, and sample circuit is stablized, accuracy is high, voltage
The advantages that output area is adjustable.
Above embodiments are referring to attached drawing, to a preferred embodiment of the present invention will be described in detail.Those skilled in the art
Member by above-described embodiment carry out various forms on modification or change, but without departing substantially from essence of the invention in the case where, all
It falls within the scope and spirit of the invention.
Claims (10)
1. a kind of alternating current sampling circuit, it is characterised in that: including the wide range AC voltage or width for will be inputted from exchange
Range alternating current be first converted into small range alternating current reconvert at small range alternating voltage Width funtion conversion circuit, be used for
Small range alternating voltage is converted into the rectification lifting circuit of a certain range of DC voltage, is used for DC voltage with mutually amplification
And export the voltage amplifier circuit of sampled voltage, the filtering wave by prolonging time for processing to be delayed, filtered and followed to sampled voltage
Follow circuit, for carrying out the output protection circuit of output protection processing and defeated with the output protection circuit to sampled voltage
The voltage output that outlet is connected.
2. alternating current sampling circuit according to claim 1, it is characterised in that: the Width funtion conversion circuit will be for that will come from
The wide range AC voltage of exchange input is first converted into small range alternating current reconvert into small range alternating voltage, the wide electricity
Voltage conversion circuit includes that first resistor (R1), voltage transformer (T1) and second resistance (R2), the first resistor are series at institute
It states between exchange input and the primary side of the voltage transformer, the secondary side of the voltage transformer and the second resistance are simultaneously
It is connected as the output end of the Width funtion conversion circuit with the input terminal of the rectification lifting circuit after connection.
3. alternating current sampling circuit according to claim 1, it is characterised in that: the Width funtion conversion circuit will be for that will come from
The wide scope alternating current of exchange input is first converted into small range alternating current reconvert into small range alternating voltage, the wide electricity
Voltage conversion circuit includes that first resistor (R11), current transformer (R1) and second resistance, the first resistor are series at the friendship
Between stream input and the primary side of the current transformer, after the secondary side of the current transformer is in parallel with the second resistance
Output end as the Width funtion conversion circuit is connected with the input terminal of the rectification lifting circuit.
4. alternating current sampling circuit according to claim 2 or 3, it is characterised in that: the rectification lifting circuit includes first
Capacitor (C1), 3rd resistor (R3) and the 4th resistance (R4), described 3rd resistor one end are connected with described 4th resistance one end, institute
State another termination power of 3rd resistor (VCC), the other end ground connection of the 4th resistance, the forward end of the first capacitor and institute
3rd resistor and the 4th resistance series connection midpoint is stated to be connected, intersection point as the rectification lifting circuit output end with it is described
The input terminal of voltage amplifier circuit is connected, the negative end of the first capacitor as the rectification lifting circuit input terminal with
The output end of the Width funtion conversion circuit is connected.
5. alternating current sampling circuit according to claim 4, it is characterised in that: the voltage amplifier circuit includes the first operation
Amplifier (U1), the 5th resistance (R5), the 6th resistance (R6), the reverse side of first operational amplifier and the 5th resistance
One end and described 6th resistance one end are connected, the other end ground connection of the 5th resistance, another termination of the 6th resistance
Ground is simultaneously connected with the output end of first operational amplifier, and the positive terminal of first operational amplifier is as the voltage
The input terminal of amplifying circuit is connected with the output end of the rectification lifting circuit, and the output end of first operational amplifier is made
The input terminal of circuit is followed to be connected with the filtering wave by prolonging time for the output end of the voltage amplifier circuit.
6. alternating current sampling circuit according to claim 5, it is characterised in that: the voltage amplifier circuit further includes the second electricity
Hold (C2), third capacitor (C3) and the 7th resistance (R7), second capacitor is series at the other end and ground of the 5th resistance
Between, the third capacitor is series between the other end and ground of the 6th resistance, described 7th resistance one end and first fortune
Calculate the output end series connection of amplifier, output end of the other end of the 7th resistance as the voltage amplifier circuit.
7. alternating current sampling circuit according to claim 6, it is characterised in that: it includes delay that the filtering wave by prolonging time, which follows circuit,
Circuit, filter circuit and circuit is followed, the input terminal of the delay circuit follows the input terminal of circuit as the filtering wave by prolonging time
It is connected with the output end of the voltage amplifier circuit, the input terminal phase of the output end of the delay circuit and the filter circuit
Connection, the output end of the filter circuit are connected with the input terminal for following circuit, and the output end for following circuit is made
The output end of circuit and the input terminal of the output protection circuit is followed to be connected for the filtering wave by prolonging time.
8. alternating current sampling circuit according to claim 7, it is characterised in that: the delay circuit includes the 8th resistance (R8)
With the 4th capacitor (C4), the filter circuit includes the 9th resistance (R9) and the 5th capacitor (C5), described that circuit is followed to include the
Two operational amplifiers (U2), described 8th resistance one end are connected with described 4th capacitor one end, another termination of the 8th resistance
Ground, the 4th capacitor other end are connected with the output end of the second operational amplifier, one end of the 9th resistance with
Described 8th resistance one end is connected with the concatenated intersection point in described 4th capacitor one end, the other end of the 9th resistance with it is described
The forward end of second operational amplifier and described 5th capacitor one end are connected, the other end ground connection of the 5th capacitor, described
The backward end of second operational amplifier is connected with the output end of the second operational amplifier, the second operational amplifier
Output end is the output end for following circuit, and the concatenated intersection point in described 8th resistance one end and described 4th capacitor one end is institute
State the input terminal of delay circuit.
9. alternating current sampling circuit according to claim 8, it is characterised in that: the output protection circuit includes the tenth resistance
(R10), the first switch diode (D1), second switch diode (D2), the anode of the first switch diode (D1)
It connects with the cathode of the second switch diode (D2), the cathode of the first switch diode accesses circuit common ground end
Voltage (VSS), the plus earth of the second switch diode, one end of the tenth resistance is as the output protection circuit
Input terminal follow the output end of circuit to be connected with the filtering wave by prolonging time, the other end of the tenth resistance is opened with described first
The anode for closing diode (D1) is connected with the concatenated intersection point of cathode of the second switch diode (D2), the tenth resistance
The other end be connected as the output end of the output protection circuit with the voltage output.
10. alternating current sampling circuit according to claim 9, it is characterised in that: the output protection circuit further includes the tenth
One resistance (R11) and the 6th capacitor (C6), the eleventh resistor are series at the other end and the voltage of the tenth resistance
Between output, one end of the 6th capacitor is accessed between the eleventh resistor and the voltage output, the 6th capacitor
The other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810795830.6A CN109061279B (en) | 2018-07-19 | 2018-07-19 | AC sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810795830.6A CN109061279B (en) | 2018-07-19 | 2018-07-19 | AC sampling circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109061279A true CN109061279A (en) | 2018-12-21 |
| CN109061279B CN109061279B (en) | 2024-01-09 |
Family
ID=64817522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810795830.6A Active CN109061279B (en) | 2018-07-19 | 2018-07-19 | AC sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109061279B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161302A (en) * | 2019-06-26 | 2019-08-23 | 广西盟创智慧科技有限公司 | A kind of conversion circuit |
| CN110488074A (en) * | 2019-09-16 | 2019-11-22 | 东莞理工学院 | A kind of ac current signal linear transformation becomes the conditioning circuit of d. c. voltage signal |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969710A (en) * | 1973-05-23 | 1976-07-13 | Hochiki Corporation | Apparatus for picking up signal currents flowing through signal lines |
| US4685048A (en) * | 1985-03-29 | 1987-08-04 | Clarion Co., Ltd. | AC-DC transformation circuit |
| JPH08181584A (en) * | 1994-12-22 | 1996-07-12 | Nec Corp | Variable delay circuit and delay time check method |
| CN2405226Y (en) * | 1999-12-28 | 2000-11-08 | 李全喜 | Multi-functional theft-proof device for single phase electric meter |
| CN2802512Y (en) * | 2004-07-20 | 2006-08-02 | 邓加慧 | Three-phase four-line metering monitor |
| CN201425603Y (en) * | 2009-04-24 | 2010-03-17 | 陕西海泰电子有限责任公司 | Signal amplifying circuit for receiver of transient high-voltage electromagnetic pulse detector |
| CN202794318U (en) * | 2012-09-04 | 2013-03-13 | 深圳市华力特电气股份有限公司 | Acquisition circuit |
| CN203965512U (en) * | 2014-07-28 | 2014-11-26 | 深圳市科华恒盛科技有限公司 | A kind of effective value isolation sample circuit of alternating voltage |
| CN204405769U (en) * | 2015-02-16 | 2015-06-17 | 西安科技大学 | A kind of portable electric energy quality monitoring device |
| CN105334379A (en) * | 2015-12-04 | 2016-02-17 | 重庆臻远电气有限公司 | Network-voltage sampling input circuit |
| CN106018937A (en) * | 2016-07-11 | 2016-10-12 | 合肥联信电源有限公司 | Power grid voltage sampling and processing method |
| CN107561351A (en) * | 2017-09-14 | 2018-01-09 | 河南工程学院 | The output voltage current sensing means and rapid analysis method of grid-connected inverting system |
| CN208537621U (en) * | 2018-07-19 | 2019-02-22 | 帝森克罗德集团有限公司 | Alternating current sampling circuit |
-
2018
- 2018-07-19 CN CN201810795830.6A patent/CN109061279B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969710A (en) * | 1973-05-23 | 1976-07-13 | Hochiki Corporation | Apparatus for picking up signal currents flowing through signal lines |
| US4685048A (en) * | 1985-03-29 | 1987-08-04 | Clarion Co., Ltd. | AC-DC transformation circuit |
| JPH08181584A (en) * | 1994-12-22 | 1996-07-12 | Nec Corp | Variable delay circuit and delay time check method |
| CN2405226Y (en) * | 1999-12-28 | 2000-11-08 | 李全喜 | Multi-functional theft-proof device for single phase electric meter |
| CN2802512Y (en) * | 2004-07-20 | 2006-08-02 | 邓加慧 | Three-phase four-line metering monitor |
| CN201425603Y (en) * | 2009-04-24 | 2010-03-17 | 陕西海泰电子有限责任公司 | Signal amplifying circuit for receiver of transient high-voltage electromagnetic pulse detector |
| CN202794318U (en) * | 2012-09-04 | 2013-03-13 | 深圳市华力特电气股份有限公司 | Acquisition circuit |
| CN203965512U (en) * | 2014-07-28 | 2014-11-26 | 深圳市科华恒盛科技有限公司 | A kind of effective value isolation sample circuit of alternating voltage |
| CN204405769U (en) * | 2015-02-16 | 2015-06-17 | 西安科技大学 | A kind of portable electric energy quality monitoring device |
| CN105334379A (en) * | 2015-12-04 | 2016-02-17 | 重庆臻远电气有限公司 | Network-voltage sampling input circuit |
| CN106018937A (en) * | 2016-07-11 | 2016-10-12 | 合肥联信电源有限公司 | Power grid voltage sampling and processing method |
| CN107561351A (en) * | 2017-09-14 | 2018-01-09 | 河南工程学院 | The output voltage current sensing means and rapid analysis method of grid-connected inverting system |
| CN208537621U (en) * | 2018-07-19 | 2019-02-22 | 帝森克罗德集团有限公司 | Alternating current sampling circuit |
Non-Patent Citations (1)
| Title |
|---|
| 杨广龙: "基于DSP的电力参数检测系统", 《中国优秀硕士学位论文全文数据库 工程科技II辑》, pages 042 - 157 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161302A (en) * | 2019-06-26 | 2019-08-23 | 广西盟创智慧科技有限公司 | A kind of conversion circuit |
| CN110488074A (en) * | 2019-09-16 | 2019-11-22 | 东莞理工学院 | A kind of ac current signal linear transformation becomes the conditioning circuit of d. c. voltage signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109061279B (en) | 2024-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106253671B (en) | A kind of internal ripple compensation circuit suitable for COT controls | |
| CN203849325U (en) | Alternating-current and direct-current voltage isolation differential sampling circuit | |
| CN109617250A (en) | A kind of anti-offset radio energy transmission system based on combined topology | |
| CN208537621U (en) | Alternating current sampling circuit | |
| CN109946506B (en) | Zero crossing detection system | |
| CN103944375B (en) | PFC control circuit and PFC circuit with same used | |
| CN109061279A (en) | Alternating current sampling circuit | |
| CN203800802U (en) | Large current detection circuit and power source circuit | |
| CN103956920A (en) | Static threshold eliminating and dynamic threshold eliminating combined type voltage-doubler rectifier | |
| CN105932677A (en) | Harmonic suppression system with multi-level active power filter | |
| CN114878901A (en) | DC-DC zero-crossing current detection circuit capable of eliminating offset voltage influence of comparator | |
| CN103151993A (en) | Precision alternating current amplifier | |
| CN204168141U (en) | For peak current sampling and the signal processing circuit thereof of full-bridge switch converter | |
| CN104242659B (en) | Peak current sampling and signal processing circuit for full-bridge switching converter | |
| CN103887990A (en) | Novel AC-AC converter based on Buck-Boost | |
| CN108387810A (en) | A kind of contactor electricity-saving appliance detection circuit | |
| CN209072361U (en) | A kind of vapor deposition power supply ac voltage signal sample circuit | |
| WO2023185189A1 (en) | Power control circuit and control method therefor | |
| CN105932877B (en) | A kind of DC-DC converter | |
| CN103336546B (en) | Low-voltage difference voltage stabilizing circuit with current-limiting protection function under double high power supply voltage input | |
| CN206099762U (en) | Voltage output switching power supply can return to zero | |
| CN209961836U (en) | Zero-crossing detection system | |
| CN106160459A (en) | The charge pump circuit system of fast transient response | |
| CN104467388B (en) | Power supply based on the conduction type harmonics restraint of PFC | |
| CN207924060U (en) | A kind of contactor electricity-saving appliance detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |