CN208322379U - A kind of isolation sample circuit of electric welding machine - Google Patents
A kind of isolation sample circuit of electric welding machine Download PDFInfo
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- CN208322379U CN208322379U CN201820764386.7U CN201820764386U CN208322379U CN 208322379 U CN208322379 U CN 208322379U CN 201820764386 U CN201820764386 U CN 201820764386U CN 208322379 U CN208322379 U CN 208322379U
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Abstract
The utility model discloses a kind of isolation sample circuits of electric welding machine, the power supply power supply an of+15V is formed after treatment to sampling control module using the power supply of Voltage Feedback itself, without independent additional control power supply, circuit is simple and reliable, after light-coupled isolation, makes to input test side and sampling control module realizes effective electrical isolation.
Description
Technical field
The utility model relates to a kind of electric welding machine circuit more particularly to a kind of isolation sample circuits of electric welding machine.
Background technique
Existing electric welding machine master controller is judged and control by the signal that sampling control module is fed back.But it is existing
Sampling control module need to be powered by individually control power supply, the connection of circuit complexity, cause integrated circuit at
This is higher.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
The purpose of this utility model is to provide a kind of isolation sample circuits of electric welding machine, it is intended to existing controlling of sampling mould
The problem of block need to be powered by individually controlling power supply, and circuit connection is complicated, integrated circuit higher cost.
The technical solution of the utility model is as follows: a kind of isolation sample circuit of electric welding machine, wherein include:
Voltage sample module for being sampled to voltage；
Power module for being powered to voltage sample module；
The sampling control module that the voltage signal of voltage sample module acquisition is judged；
Optical coupling module for isolation voltage sampling module and sampling control module；
The power module is connect with voltage sample module, and voltage sample module is connect with optical coupling module, optical coupling module with
Sampling control module connection: voltage sample module is sampled to voltage and is fed back to voltage sample module, voltage sample module
Collected power supply signal is judged, the power supply that collected voltage signal feeds back itself forms sampling control after treatment
The power supply of molding block, is powered for sampling control module.
The isolation sample circuit of the electric welding machine, wherein the voltage sample module includes one end connection voltage signal
One end of the first resistor device of feedback, the first resistor device other end and first capacitor connects, another termination of first capacitor
The anode connection of ground, first resistor device one end and first diode, the cathode of first diode are connect with power module, the first electricity
The one end for hindering the device other end and second resistor connects, the other end ground connection of second resistor, one end of second resistor and the
The anode connection of two diodes, the cathode of the second diode are connect with 7 feet of the first operational amplifier, the first operational amplifier
7 feet are connect with optical coupling module, and the first resistor device other end is connect with 3 feet of the first operational amplifier, and the 2 of the first operational amplifier
Foot is connect with 3rd resistor device one end, and 3rd resistor device other end ground connection, 2 feet and optical coupling module of the first operational amplifier connect
It connects, the 4 feet ground connection of the first operational amplifier, 6 feet of the first operational amplifier are connect with optical coupling module, the first operational amplifier
6 feet are connect with one end of the second capacitor, and the other end of the second capacitor is connect with 3rd resistor device one end, one end of the 4th resistor
It is connect with optical coupling module, the other end of the 4th resistor is connect with the anode of the first light emitting diode, the first light emitting diode
Cathode ground connection.
The isolation sample circuit of the electric welding machine, wherein the power module includes the negative of one end and first diode
One end connection of 5th resistor of pole connection, the other end of the 5th resistor are connect with the anode of the first polar capacitor, and first
The cathode of polar capacitor is grounded, and the other end of the 5th resistor is connect with one end of the 6th resistor, the 6th resistor it is another
End is connect with the first zener diode cathode, the first zener diode plus earth, the other end and the first NPN of the 6th resistor
1 foot of type triode connects, and the other end of the 5th resistor is connect with 2 feet of the first NPN type triode, three pole of the first NPN type
3 feet of pipe connect to be connect with the anode of the second polar capacitor, the cathode ground connection of the second polar capacitor, 3 feet of the first NPN type triode
It connects and is connect with one end of third capacitor, the other end ground connection of third capacitor.
The isolation sample circuit of the electric welding machine, wherein the optical coupling module includes photoelectrical coupler, the photoelectricity coupling
1 foot of clutch is connect with one end of the 4th resistor, and 2 feet of photoelectrical coupler are connect with 6 feet of the first operational amplifier, photoelectricity
3 feet of coupler are connect with 7 feet of the first operational amplifier, and 4 feet of photoelectrical coupler and 2 feet of the first operational amplifier connect
It connects, 6 foot external voltages of photoelectrical coupler, 5 feet of photoelectrical coupler are connect with sampling control module.
The isolation sample circuit of the electric welding machine, wherein the sampling control module includes one end and photoelectrical coupler
The connection of 5 feet the 7th resistor, the other end ground connection of the 7th resistor, one end of one end of the 7th resistor and the 4th capacitor
Connection, the other end ground connection of the 4th capacitor, one end of the 7th resistor and 2 feet of second operational amplifier connect, the 7th resistance
One end of device and 3 feet of second operational amplifier connect, and 2 feet of second operational amplifier and 1 foot of second operational amplifier connect
It connects, 1 foot of second operational amplifier is connect with one end of the 8th resistor, and the other end of the 8th resistor is external, the second operation
8 feet of amplifier are connect with one end of the 5th capacitor, the other end of the 5th capacitor ground connection, 4 feet of second operational amplifier and the
One end of six capacitors connects, the other end ground connection of the 6th capacitor.
The utility model has the beneficial effects that the utility model is utilized by providing a kind of isolation sample circuit of electric welding machine
The power supply of Voltage Feedback itself forms the power supply power supply an of+15V to sampling control module, without independence after treatment
Additional control power supply, circuit is simple and reliable, after light-coupled isolation, makes to input test side and sampling control module is realized effectively
Electrical isolation.
Detailed description of the invention
Fig. 1 is the module connection figure of the isolation sample circuit of electric welding machine in the utility model.
Fig. 2 is the element connection figure of the isolation sample circuit of electric welding machine in the utility model.
Specific embodiment
The embodiments of the present invention is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein
Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below
It crosses the embodiment being described with reference to the drawings to be exemplary, is only used for explaining the utility model, and should not be understood as practical to this
Novel limitation.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside",
The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise " be based on the orientation or positional relationship shown in the drawings, be only for
Convenient for description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have specifically
Orientation is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " first ",
" second " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicates indicated technology
The quantity of feature.Define " first " as a result, the feature of " second " can explicitly or implicitly include it is one or more
The feature.The meaning of " plurality " is two or more in the description of the present invention, unless otherwise clearly specific
It limits.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements or the interaction relationship of two elements.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
Following disclosure provides many different embodiments or example is used to realize the different structure of the utility model.
In order to simplify the disclosure of the utility model, hereinafter the component of specific examples and setting are described.Certainly, they are only
Example, and purpose does not lie in limitation the utility model.In addition, the utility model can in different examples repeat reference numerals
And/or reference letter, this repetition are for purposes of simplicity and clarity, itself not indicate discussed various embodiments
And/or the relationship between setting.In addition, the example of various specific techniques and material that the utility model provides, but this
Field those of ordinary skill can be appreciated that the application of other techniques and/or the use of other materials.
As depicted in figs. 1 and 2, the isolation sample circuit of a kind of electric welding machine, comprising:
Voltage sample module 100 for being sampled to voltage；
Power module 200 for being powered to voltage sample module 100；
The sampling control module 300 that the voltage signal that voltage sample module 100 acquires is judged；
Optical coupling module 400 for isolation voltage sampling module 100 and sampling control module 300；
The power module 200 is connect with voltage sample module 100, and voltage sample module 100 and optical coupling module 400 connect
Connect, optical coupling module 400 is connect with sampling control module 300: voltage sample module 100 samples voltage and feeds back to voltage
Sampling module 100, voltage sample module 100 judge that collected power supply signal, collected voltage signal feedback is originally
The power supply of body forms the power supply of sampling control module 300 after treatment, is powered for sampling control module 300.
Specifically, the voltage sample module 100 includes the first resistor device R30 of one end connection voltage signal feedback, institute
It states the first resistor device R30 other end to connect with one end of first capacitor C43, the other end ground connection of first capacitor C43, first resistor
The one end device R30 is connect with the anode of first diode D21, and the cathode of first diode D21 is connect with power module 200, and first
The resistor R30 other end is connect with one end of second resistor R33, the other end ground connection of second resistor R33, second resistor
One end of R33 is connect with the anode of the second diode D19,7 feet of the cathode of the second diode D19 and the first operational amplifier U7
Connection, 7 feet of the first operational amplifier U7 are connect with optical coupling module 400, the first resistor device R30 other end and the first operation amplifier
3 feet of device U7 connect, and 2 feet of the first operational amplifier U7 are connect with the one end 3rd resistor device R37, and 3rd resistor device R37 is another
End ground connection, 2 feet of the first operational amplifier U7 are connect with optical coupling module 400, the 4 feet ground connection of the first operational amplifier U7, and first
6 feet of operational amplifier U7 are connect with optical coupling module 400, and one end of 6 feet of the first operational amplifier U7 and the second capacitor C44 connect
It connects, the other end of the second capacitor C44 is connect with the one end 3rd resistor device R37, one end of the 4th resistor R29 and optical coupling module
400 connections, the other end of the 4th resistor R29 are connect with the anode of the first light emitting diode VD4, the first light emitting diode VD4
Cathode ground connection.
Specifically, the power module 200 includes the 5th resistor that one end is connect with the cathode of first diode D21
One end of R36 connects, and the other end of the 5th resistor R36 is connect with the anode of the first polar capacitor C49, the first polar capacitor
The cathode of C49 is grounded, and the other end of the 5th resistor R36 is connect with one end of the 6th resistor R39, the 6th resistor R39's
The other end is connect with the first zener diode D22 cathode, and the first zener diode D22 plus earth, the 6th resistor R39's is another
One end is connect with 1 foot of the first NPN type triode Q2, and the 2 of the other end of the 5th resistor R36 and the first NPN type triode Q2
Foot connection, 3 feet of the first NPN type triode Q2 connect to be connect with the anode of the second polar capacitor C48, the second polar capacitor C48's
Cathode ground connection, 3 feet of the first NPN type triode Q2 connect to be connect with one end of third capacitor C50, the other end of third capacitor C50
Ground connection.
Specifically, the optical coupling module 400 includes photoelectrical coupler U9,1 foot of the photoelectrical coupler U9 and the 4th electricity
One end connection of device R29 is hindered, 2 feet of photoelectrical coupler U9 are connect with 6 feet of the first operational amplifier U7, photoelectrical coupler U9's
3 feet are connect with 7 feet of the first operational amplifier U7, and 4 feet of photoelectrical coupler U9 are connect with 2 feet of the first operational amplifier U7,
The 6 foot external voltages of photoelectrical coupler U9,5 feet of photoelectrical coupler U9 are connect with sampling control module 300.
Specifically, the sampling control module 300 includes the 7th resistor that one end is connect with 5 feet of photoelectrical coupler U9
The other end of R34, the 7th resistor R34 are grounded, and one end of the 7th resistor R34 is connect with one end of the 4th capacitor R46, and the 4th
The other end of capacitor R46 is grounded, and one end of the 7th resistor R34 is connect with 2 feet of second operational amplifier U8, the 7th resistor
One end of R34 is connect with 3 feet of second operational amplifier U8,2 feet and second operational amplifier U8 of second operational amplifier U8
The connection of 1 foot, 1 foot of second operational amplifier U8 connect with one end of the 8th resistor R35, and the 8th resistor R35's is another
To hold external, 8 feet of second operational amplifier U8 are connect with one end of the 5th capacitor C42, the other end ground connection of the 5th capacitor C42,
4 feet of second operational amplifier U8 are connect with one end of the 6th capacitor C45, the other end ground connection of the 6th capacitor C45.
The working principle of the isolation sample circuit of this electric welding machine is as follows: by first diode D21, the 5th resistor R36,
6th resistor R39, first zener diode D22, the first NPN type triode Q2 one 15V power supply of composition are put to the first operation
Big device U7 power supply forms one 1/10 Voltage Feedback by first resistor device R30, second resistor R33, first capacitor C43
To 3 feet of the first operational amplifier U7,2 feet and light of photoelectrical coupler U9 are output to by 6 feet of the first operational amplifier U7
The luminous quantity of 1 foot of electric coupler U9 makes the electric current of the 3 of photoelectrical coupler U9,4 feet and 6,5 feet of photoelectrical coupler U9 flowed through
Unanimously, 3, the 4 foot electric currents of photoelectrical coupler U9 form Voltage Feedback to the first operational amplifier U7 after flowing through 3rd resistor device R37
2 feet, so that the effect of voltage follow is realized, since the 6 of photoelectrical coupler U9,5 foot electric currents are to 3,4 feet of photoelectrical coupler U9
Electric current it is consistent and the 7th resistor R34 is equal to 3rd resistor device R37, be equal to by the voltage formed after the 7th resistor R34
3 feet of first operational amplifier U7 are to realize that input voltage isolation after the decaying of 1/10 ratio feeds back to control circuit.
The technical program forms the power supply power supply an of+15V to adopting using the power supply of Voltage Feedback itself after treatment
Sample control module, without independent additional control power supply, circuit is simple and reliable, after light-coupled isolation, makes to input test side
Effective electrical isolation is realized with sampling control module.
In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation
What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the utility model.In this explanation
In book, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
It should be understood that the application of the utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come
It says, it can be modified or changed according to the above description, and all these modifications and variations all should belong to the appended power of the utility model
The protection scope that benefit requires.
Claims (5)
1. a kind of isolation sample circuit of electric welding machine characterized by comprising
Voltage sample module for being sampled to voltage；
Power module for being powered to voltage sample module；
The sampling control module that the voltage signal of voltage sample module acquisition is judged；
Optical coupling module for isolation voltage sampling module and sampling control module；
The power module is connect with voltage sample module, and voltage sample module is connect with optical coupling module, optical coupling module and sampling
Control module connection: voltage sample module is sampled to voltage and is fed back to voltage sample module, and voltage sample module is to adopting
The power supply signal collected is judged that the power supply that collected voltage signal feeds back itself forms controlling of sampling mould after treatment
The power supply of block, is powered for sampling control module.
2. the isolation sample circuit of electric welding machine according to claim 1, which is characterized in that the voltage sample module includes
One end of the first resistor device of one end connection voltage signal feedback, the first resistor device other end and first capacitor connects, the
The other end of one capacitor is grounded, and the anode of first resistor device one end and first diode connects, the cathode and electricity of first diode
One end of source module connection, the first resistor device other end and second resistor connects, the other end ground connection of second resistor, and second
One end of resistor is connect with the anode of the second diode, and the cathode of the second diode is connect with 7 feet of the first operational amplifier,
7 feet of the first operational amplifier are connect with optical coupling module, and the first resistor device other end is connect with 3 feet of the first operational amplifier,
2 feet of the first operational amplifier are connect with 3rd resistor device one end, 3rd resistor device other end ground connection, the first operational amplifier
2 feet are connect with optical coupling module, and the 4 feet ground connection of the first operational amplifier, 6 feet of the first operational amplifier are connect with optical coupling module,
6 feet of the first operational amplifier are connect with one end of the second capacitor, and the other end of the second capacitor is connect with 3rd resistor device one end,
One end of 4th resistor is connect with optical coupling module, and the other end of the 4th resistor is connect with the anode of the first light emitting diode,
The cathode of first light emitting diode is grounded.
3. the isolation sample circuit of electric welding machine according to claim 2, which is characterized in that the power module includes one end
The one end for the 5th resistor connecting with the cathode of first diode connects, the other end and the first polar capacitor of the 5th resistor
Anode connection, the cathode ground connection of the first polar capacitor, the other end of the 5th resistor connect with one end of the 6th resistor, the
The other end of six resistors is connect with the first zener diode cathode, the first zener diode plus earth, the 6th resistor
The other end is connect with 1 foot of the first NPN type triode, and the other end of the 5th resistor and 2 feet of the first NPN type triode connect
It connecing, 3 feet of the first NPN type triode connect to be connect with the anode of the second polar capacitor, the cathode ground connection of the second polar capacitor, and first
3 feet of NPN type triode connect to be connect with one end of third capacitor, the other end ground connection of third capacitor.
4. the isolation sample circuit of electric welding machine according to claim 3, which is characterized in that the optical coupling module includes photoelectricity
1 foot of coupler, the photoelectrical coupler is connect with one end of the 4th resistor, and 2 feet and the first operation of photoelectrical coupler are put
The 6 feet connection of big device, 3 feet of photoelectrical coupler are connect with 7 feet of the first operational amplifier, 4 feet of photoelectrical coupler and first
2 feet of operational amplifier connect, 6 foot external voltages of photoelectrical coupler, and 5 feet and sampling control module of photoelectrical coupler connect
It connects.
5. the isolation sample circuit of electric welding machine according to claim 4, which is characterized in that the sampling control module includes
7th resistor of 5 feet of one end and photoelectrical coupler connection, the other end ground connection of the 7th resistor, one end of the 7th resistor
It is connect with one end of the 4th capacitor, the other end of the 4th capacitor ground connection, the 2 of one end of the 7th resistor and second operational amplifier
Foot connection, one end of the 7th resistor and 3 feet of second operational amplifier connect, 2 feet of second operational amplifier and the second fortune
Calculate the 1 foot connection of amplifier, 1 foot of second operational amplifier connect with one end of the 8th resistor, the 8th resistor it is another
Hold external, 8 feet of second operational amplifier are connect with one end of the 5th capacitor, the other end ground connection of the 5th capacitor, the second operation
4 feet of amplifier are connect with one end of the 6th capacitor, the other end ground connection of the 6th capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820764386.7U CN208322379U (en) | 2018-05-22 | 2018-05-22 | A kind of isolation sample circuit of electric welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820764386.7U CN208322379U (en) | 2018-05-22 | 2018-05-22 | A kind of isolation sample circuit of electric welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208322379U true CN208322379U (en) | 2019-01-04 |
Family
ID=64774735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820764386.7U Active CN208322379U (en) | 2018-05-22 | 2018-05-22 | A kind of isolation sample circuit of electric welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208322379U (en) |
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2018
- 2018-05-22 CN CN201820764386.7U patent/CN208322379U/en active Active
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