CN208270636U - It is a kind of can automatic clear integrating circuit - Google Patents
It is a kind of can automatic clear integrating circuit Download PDFInfo
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- CN208270636U CN208270636U CN201820865145.1U CN201820865145U CN208270636U CN 208270636 U CN208270636 U CN 208270636U CN 201820865145 U CN201820865145 U CN 201820865145U CN 208270636 U CN208270636 U CN 208270636U
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Abstract
The utility model discloses it is a kind of can automatic clear integrating circuit, including Rogowski coil, integrator and signal deteching circuit；The anode of Rogowski coil is connect with integrator and signal deteching circuit respectively, and the cathode ground connection of Rogowski coil, signal deteching circuit is also connect with integrator, for discharging integrator；Integrator includes operational amplifier A1, capacitor C1, resistance R1 and R2；The anode of Rogowski coil is connect through resistance R1 with the inverting input terminal of operational amplifier A1, the positive input of operational amplifier A1 is grounded by resistance R2, and the both ends of capacitor C1 are connect with the output end of the reverse input end of operational amplifier A1 and operational amplifier A1 respectively.Advantages and beneficial effects of the utility model lie in that realizing the effect being zeroed out to integrator, there is the case where integral saturation in the capacitor for avoiding integrator, and then avoid integrator and integrator drift occur, it ensure that the integrated signal of integrator output can really reflect the truth of DC current in route.
Description
Technical field
The utility model relates to electronic field, in particular to it is a kind of can automatic clear integrating circuit.
Background technique
Inverter type welder is sampled by DC current of the Rogowski coil to route at present, then by integrator to Roche line
The differential signal of circle output carries out integral reduction, and obtains the integrated signal with the Waveform Matching of the direct current in route；However
Existing integrator has cumulative characteristic, signal small again passes through integrating circuit can with the time variation increasingly
Greatly, until integral saturation, integral cannot really reflect that input signal, this phenomenon become integrator drift after being saturated.
Utility model content
To solve the above-mentioned problems, the utility model provide it is a kind of can automatic clear integrating circuit.In the technical program
Rogowski coil samples acquisition differential signal for sampling to the DC current of route；Rogowski coil is defeated by differential signal
Out to integrator, and the integrated signal with the Waveform Matching of the direct current in route is obtained by the integral reduction of integrator；Fortune
The output end for calculating amplifier A1, which exports integrated signal to analog-digital converter, carries out analog-to-digital conversion；
Differential signal is also exported through resistance R3 to the positive input of operational amplifier A2, when the level of differential signal is positive
When voltage, the output end of operational amplifier A2 is high level signal to the first output signal that superposition end exports, and works as differential signal
Level when being 0, the output end of operational amplifier A2 to the first output signal that superposition end exports be low level signal；Work as differential
When the level of signal is negative voltage, the first output signal that the output end of operational amplifier A2 is exported to superposition end is low level letter
Number；
When the level of differential signal is negative voltage, second that the output end of operational amplifier A3 is exported to superposition end is exported
Signal is high level signal, when the level of differential signal is 0, the output end of operational amplifier A3 exported to superposition end second
Output signal is low level signal；When the level of differential signal is positive voltage, the output end of operational amplifier A3 is to superposition end
Second output signal of output is low level signal；
The first output signal and the second output signal of operational amplifier A2 and operational amplifier A3 output are in superposition endlap
Add to form reset signal, and exports to relay J1；
When reset signal is high level, the moving contact and fixed contact of relay J1 is off-state, is believed when resetting
When number being low level, the moving contact and fixed contact of relay J1 are closed state, at this time capacitor C1, resistance R4 and relay
J1 will be formed into a loop, and capacitor C1 is made to discharge to resistance R4, to realize the effect being zeroed out to integrator, avoid integrator
There is the case where integral saturation in capacitor, and then avoids integrator and integrator drift occur, ensure that the integral letter of integrator output
It number can really reflect the truth of DC current in route.
One of the utility model can automatic clear integrating circuit, including Rogowski coil, integrator and signal detection
Circuit；The anode of the Rogowski coil is connect with the integrator and signal deteching circuit respectively, the cathode of the Rogowski coil
Ground connection, the signal deteching circuit is also connect with the integrator, for discharging integrator；The integrator includes fortune
Calculate amplifier A1, capacitor C1, resistance R1 and R2；The anode of the Rogowski coil is through the anti-of the resistance R1 and operational amplifier A1
The positive input of the connection of phase input terminal, the operational amplifier A1 is grounded by the resistance R2, the both ends of the capacitor C1
It is connect respectively with the output end of the reverse input end of the operational amplifier A1 and operational amplifier A1.
In above scheme, the signal deteching circuit include operational amplifier A2 and A3, diode D1 and D2, resistance R3,
It is superimposed end M1 and electronic switch；
The anode of the Rogowski coil is connect through resistance R3 with the positive input of the operational amplifier A2, the operation
The reverse input end of amplifier A2 is grounded；The anode of the Rogowski coil is through the reversed defeated of the resistance R3 and operational amplifier A3
Enter end connection, the positive input ground connection of the operational amplifier A3；
The anode of the output end of the operational amplifier A2 and the diode D1 connects, the cathode of the diode D1 and
The superposition end M1 connection, the output end of the operational amplifier A3 are connect with the anode of the diode D2, the diode
The cathode of D2 is connect with the superposition end M1；The output end of the operational amplifier A2 is through diode D1 to superposition end M1 output the
The output end of one output signal, the operational amplifier A3 exports the second output signal to superposition end M1 through diode D2；It is described
Superposition end M1 is also connect with the electronic switch, and the electronic switch is connect with the both ends of the capacitor C1.
In above scheme, the electronic switch includes relay J1 and resistance R4；The fixed contact of the relay J1 with
The reversed input of one end connection of the resistance R4, the other end of the resistance R4 and the capacitor C1 towards operational amplifier A1
The one end at end connects, one end of the moving contact of the relay J1 and output end of the capacitor C1 towards operational amplifier A1
Connection, the coil terminals of the relay J1 are connect with the superposition end M1.
Advantages and beneficial effects of the utility model lie in that the utility model provide it is a kind of can automatic clear integral electricity
Road realizes the effect being zeroed out to integrator, and the case where integral saturation occurs in the capacitor for avoiding integrator, and then avoids
There is integrator drift in integrator, ensure that the integrated signal of integrator output can really reflect the true of DC current in route
Truth condition.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, it will be before not making the creative labor property for those of ordinary skill in the art
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 be the utility model one kind can automatic clear integrating circuit structural schematic diagram.
In figure: 1, Rogowski coil 2, integrator 3, signal deteching circuit 4, electronic switch
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.Implement below
Example is only used for clearly illustrating the technical solution of the utility model, and cannot be used as a limitation the protection model of limitation the utility model
It encloses.
As shown in Figure 1, the utility model be it is a kind of can automatic clear integrating circuit, including Rogowski coil 1, integrator 2
With signal deteching circuit 3；The anode of Rogowski coil 1 is connect with integrator 2 and signal deteching circuit 3 respectively, and Rogowski coil 1 is born
Pole ground connection, signal deteching circuit 3 is also connect with integrator 2, for discharging integrator 2；Integrator 2 includes operation amplifier
Device A1, capacitor C1, resistance R1 and R2；The anode of Rogowski coil 1 is connect through resistance R1 with the inverting input terminal of operational amplifier A1,
The positive input of operational amplifier A1 is grounded by resistance R2, and the both ends of capacitor C1 are reversed defeated with operational amplifier A1 respectively
Enter end to connect with the output end of operational amplifier A1.
Specifically, signal deteching circuit 3 includes operational amplifier A2 and A3, diode D1 and D2, resistance R3, superposition end M1
With electronic switch 4；
The anode of Rogowski coil 1 is connect through resistance R3 with the positive input of operational amplifier A2, operational amplifier A2's
Reverse input end ground connection；The anode of Rogowski coil 1 is connect through resistance R3 with the reverse input end of operational amplifier A3, operation amplifier
The positive input of device A3 is grounded；
The output end of operational amplifier A2 is connect with the anode of diode D1, and the cathode of diode D1 connects with end M1 is superimposed
It connects, the output end of operational amplifier A3 is connect with the anode of diode D2, and the cathode of diode D2 is connect with superposition end M1；Operation
The output end of amplifier A2 exports the first output signal to superposition end M1 through diode D1, and the output end of operational amplifier A3 is through two
Pole pipe D2 exports the second output signal to superposition end M1；Superposition end M1 is also connect with electronic switch 4, electronic switch 4 and capacitor C1
Both ends connection.
Further, electronic switch 4 includes relay J1 and resistance R4；The fixed contact of relay J1 and the one of resistance R4
End connection, the other end of resistance R4 are connect with one end of capacitor C1 towards the reverse input end of operational amplifier A1, relay J1
Moving contact connect with one end of capacitor C1 towards the output end of operational amplifier A1, the coil terminals of relay J1 be superimposed
Hold M1 connection.
The working principle of above-mentioned technical proposal is: Rogowski coil 1 is sampled for sampling to the DC current of route
Obtain differential signal；Rogowski coil 1 exports differential signal to integrator 2, and passes through the integral of integrator 2 reduction acquisition and line
The integrated signal of the Waveform Matching of direct current in road；The output end of operational amplifier A1 exports integrated signal to analog-to-digital conversion
Device carries out analog-to-digital conversion；
Differential signal is also exported through resistance R3 to the positive input of operational amplifier A2, when the level of differential signal is positive
When voltage, the output end of operational amplifier A2 is high level signal to the first output signal that superposition end exports, and works as differential signal
Level when being 0, the output end of operational amplifier A2 to the first output signal that superposition end exports be low level signal；Work as differential
When the level of signal is negative voltage, the first output signal that the output end of operational amplifier A2 is exported to superposition end is low level letter
Number；
When the level of differential signal is negative voltage, second that the output end of operational amplifier A3 is exported to superposition end is exported
Signal is high level signal, when the level of differential signal is 0, the output end of operational amplifier A3 exported to superposition end second
Output signal is low level signal；When the level of differential signal is positive voltage, the output end of operational amplifier A3 is to superposition end
Second output signal of output is low level signal；
The first output signal and the second output signal of operational amplifier A2 and operational amplifier A3 output are in superposition endlap
Add to form reset signal, and exports to relay J1；
When reset signal is high level, the moving contact and fixed contact of relay J1 is off-state, is believed when resetting
When number being low level, the moving contact and fixed contact of relay J1 are closed state, at this time capacitor C1, resistance R4 and relay
J1 will be formed into a loop, and capacitor C1 is made to discharge to resistance R4, to realize the effect being zeroed out to integrator 2, avoid integrator 2
Capacitor there is the case where integral saturation, and then avoid integrator 2 and integrator drift occur, ensure that the product that integrator 2 exports
Sub-signal can really reflect the truth of DC current in route.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (3)
1. one kind can automatic clear integrating circuit, which is characterized in that including Rogowski coil, integrator and signal deteching circuit；
The anode of the Rogowski coil is connect with the integrator and signal deteching circuit respectively, the cathode ground connection of the Rogowski coil,
The signal deteching circuit is also connect with the integrator, for discharging integrator；The integrator includes that operation is put
Big device A1, capacitor C1, resistance R1 and R2；The anode of the Rogowski coil is defeated through resistance R1 and the reverse phase of the operational amplifier A1
Enter end connection, the positive input of the operational amplifier A1 is grounded by the resistance R2, the both ends difference of the capacitor C1
It is connect with the output end of the reverse input end of the operational amplifier A1 and operational amplifier A1.
2. one kind according to claim 1 can automatic clear integrating circuit, which is characterized in that the signal deteching circuit
Including operational amplifier A2 and A3, diode D1 and D2, resistance R3, superposition end M1 and electronic switch；
The anode of the Rogowski coil is connect through resistance R3 with the positive input of the operational amplifier A2, the operation amplifier
The reverse input end of device A2 is grounded；The positive reverse input end through resistance R3 Yu the operational amplifier A3 of the Rogowski coil
Connection, the positive input ground connection of the operational amplifier A3；
The anode of the output end of the operational amplifier A2 and the diode D1 are connect, the cathode of the diode D1 with it is described
It is superimposed end M1 connection, the output end of the operational amplifier A3 is connect with the anode of the diode D2, the diode D2's
Cathode is connect with the superposition end M1；The output end of the operational amplifier A2 is defeated to superposition end M1 output first through diode D1
The output end of signal out, the operational amplifier A3 exports the second output signal to superposition end M1 through diode D2；The superposition
End M1 is also connect with the electronic switch, and the electronic switch is connect with the both ends of the capacitor C1.
3. one kind according to claim 2 can automatic clear integrating circuit, which is characterized in that the electronic switch includes
Relay J1 and resistance R4；The fixed contact of the relay J1 is connect with one end of the resistance R4, and the resistance R4's is another
One end of reverse input end of the one end with the capacitor C1 towards operational amplifier A1 is connect, the moving contact of the relay J1
One end of output end with the capacitor C1 towards operational amplifier A1 is connect, and the coil terminals of the relay J1 are folded with described
Add end M1 connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820865145.1U CN208270636U (en) | 2018-05-29 | 2018-05-29 | It is a kind of can automatic clear integrating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820865145.1U CN208270636U (en) | 2018-05-29 | 2018-05-29 | It is a kind of can automatic clear integrating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208270636U true CN208270636U (en) | 2018-12-21 |
Family
ID=64688479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820865145.1U Active CN208270636U (en) | 2018-05-29 | 2018-05-29 | It is a kind of can automatic clear integrating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208270636U (en) |
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2018
- 2018-05-29 CN CN201820865145.1U patent/CN208270636U/en active Active
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