CN209664537U - The gas shield welding control circuit that wire feed rate can be made to change with floating voltage and changed - Google Patents
The gas shield welding control circuit that wire feed rate can be made to change with floating voltage and changed Download PDFInfo
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- CN209664537U CN209664537U CN201920163456.8U CN201920163456U CN209664537U CN 209664537 U CN209664537 U CN 209664537U CN 201920163456 U CN201920163456 U CN 201920163456U CN 209664537 U CN209664537 U CN 209664537U
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Abstract
The gas shield welding control circuit that wire feed rate can be made to change with floating voltage the utility model discloses one kind and changed comprising: main loop circuit, output current collection circuit, output voltage Acquisition Circuit, data processing circuit, parameter input circuit, display circuit, ac contactor control circuit, solenoid valve control circuit and wire feed rate control circuit.The utility model has the beneficial effect that (1) in gas-shielded welder work, can be such that the wire feed rate of gas-shielded welder changes with the variation of floating voltage, eliminates the process for adjusting wire feed rate repeatedly；(2) in voltage ripple of power network, instant voltage and the mutually matched state of instant wire feed rate can be realized with the fluctuation of network voltage, timely automated adjusting wire feed rate, so as to reach best welding effect.
Description
Technical field
The utility model relates to a kind of gas shield welding control circuits, and in particular to one kind can make wire feed rate with floating voltage
The gas shield welding control circuit of variation and variation, belongs to electroporation field.
Background technique
Currently, gas-shielded welder available on the market, is the turn ratio by changing transformer primary and secondary, changes secondary to realize
Voltage.Under different voltages, cooperate different wire feed rate and gas control, this gas-shielded welder that gas shield may be implemented
Welding.However, then needing to adjust wire feed rate repeatedly under different voltage to reach ideal welding effect.
In addition, it is known that network voltage but under the control of current control circuit, is sent in the presence of fluctuation
Silk speed can not still be automatically adjusted with the fluctuation of network voltage, so current market sales of gas-shielded welder also fails to
Reach ideal welding effect.
Utility model content
To solve the deficiencies in the prior art, the purpose of this utility model is to provide one kind to make wire feed rate with zero load
Voltage change and the gas shield welding control circuit changed.
In order to achieve the above objectives, the utility model adopts the following technical solutions:
A kind of gas shield welding control circuit that wire feed rate can be made to change with floating voltage and changed, which is characterized in that should
Gas shield welding control circuit include: main loop circuit, output current collection circuit, output voltage Acquisition Circuit, data processing circuit,
Parameter input circuit, display circuit, ac contactor control circuit, solenoid valve control circuit and wire feed rate control circuit,
In:
Aforementioned main loop circuit is sequentially connected by A.C. contactor, change-over switch, transformer and low-voltage rectifier and is constituted, and
And reactor and current sensor is also respectively connected in the V+ output end and V- output end of low-voltage rectifier；
Aforementioned output current collection circuit and output voltage Acquisition Circuit are connect with main loop circuit, are respectively intended to acquire
The output electric current and output voltage of main loop circuit；
Aforementioned parameters input circuit and display circuit are connect with data processing circuit, are respectively intended to data processing circuit
The parameter of middle input parameter and display input；
Aforementioned data processing circuit receives and processes output current collection circuit and defeated using STC15F2K60S2 chip
The electric current and voltage of voltage collection circuit acquisition out, output are respectively intended to the opening and closing of control A.C. contactor, solenoid valve opening and closing and send
Three signals of silk machine wire feed rate；
Aforementioned ac contactor control circuit, solenoid valve control circuit and wire feed rate control circuit with
STC15F2K60S2 chip connection, output end respectively in main loop circuit A.C. contactor, protection letter shoot road on
Solenoid valve, wire-feed motor connection.
The gas shield welding control circuit above-mentioned that wire feed rate can be made to change with floating voltage and changed, which is characterized in that
Aforementioned output current collection circuit is made of 5 resistance, 2 capacitors, 1 voltage amplifier and 1 voltage follower, in which:
Resistance R5 and capacitor C1 are connect with the non-inverting input terminal of voltage amplifier U4A, resistance R6 and resistance R7 with electricity
The inverting input terminal connection of amplifier U4A is pressed, the other end and resistance R8 of resistance R7 connects with the output end of voltage amplifier U4A
It connects, the output negative pole connection of the other end of resistance R5 and main loop circuit and tie point are located at the output end of current sensor, electric
The other end for holding C1 and resistance R6 is grounded；
The non-inverting input terminal of voltage follower U4B is connect with the other end of resistance R8, and inverting input terminal is connect with output end；
Resistance R9 is connected with capacitor C2, and the other end of resistance R9 is connect with the output end of voltage follower U4B, capacitor C2's
The tie point of other end ground connection, resistance R9 and capacitor C2 are the output ends of the output current collection circuit.
The gas shield welding control circuit above-mentioned that wire feed rate can be made to change with floating voltage and changed, which is characterized in that
Aforementioned output voltage Acquisition Circuit is made of 4 resistance, 2 capacitors and 2 voltage followers, in which:
Resistance R10, resistance R11 and capacitor C3 are connect with the non-inverting input terminal of voltage follower U5A, and resistance R10's is another
The other end of the connection of the output cathode of one end and main loop circuit, resistance R11 and capacitor C3 are grounded, voltage follower U5A's
Inverting input terminal is connect with output end；
The both ends of resistance R12 connect with the non-inverting input terminal of the output end of voltage follower U5A, voltage follower U5B respectively
It connects, the inverting input terminal of voltage follower U5B is connect with output end；
Resistance R13 is connected with capacitor C4, and the other end of resistance R13 is connect with the output end of voltage follower U5B, capacitor C4
Other end ground connection, the tie point of resistance R13 and capacitor C4 are the output ends of the output voltage Acquisition Circuit.
The gas shield welding control circuit above-mentioned that wire feed rate can be made to change with floating voltage and changed, which is characterized in that
Aforementioned ac contactor control circuit is made of resistance R1, resistance R2, triode Q1 and relay K1, in which:
Resistance R1 and resistance R2 are connect with the base stage of triode Q1, the other end and STC15F2K60S2 chip of resistance R1
Connection, the other end ground connection of resistance R2；
The collector of triode Q1 is connect with the input terminal of relay K1, in the output end and main loop circuit of relay K1
A.C. contactor connection；
The emitter of triode Q1 is grounded.
The gas shield welding control circuit above-mentioned that wire feed rate can be made to change with floating voltage and changed, which is characterized in that
Aforementioned electromagnetic valve controling circuit is made of resistance R3, resistance R4, triode Q2 and relay K2, in which:
Resistance R3 and resistance R4 are connect with the base stage of triode Q2, the other end and STC15F2K60S2 chip of resistance R3
Connection, the other end ground connection of resistance R4；
The collector of triode Q2 is connect with the input terminal of relay K2, the output end and protection letter shoot of relay K2
Solenoid valve connection on road；
The emitter of triode Q2 is grounded.
The gas shield welding control circuit above-mentioned that wire feed rate can be made to change with floating voltage and changed, which is characterized in that
Aforementioned wire feed rate control circuit is made of 10 resistance, 2 triodes, 2 field-effect tube and 1 diode, in which:
Resistance R19 and resistance R20 are connect with the base stage of triode Q5, the other end and STC15F2K60S2 of resistance R19
Chip connection, the other end ground connection of resistance R20；
The collector of triode Q5 is connect with+12V power supply, and emitter is connect with resistance R15 and resistance R18, resistance R15's
The other end is connect with the grid of field-effect tube Q3, the other end ground connection of resistance R18；
The drain electrode of field-effect tube Q3 is connect with+24V power supply, and source electrode and resistance R14, diode D1 and wire-feed motor motor connect
It connects, the other end of wire-feed motor motor is connect with resistance R17, and the other end of resistance R17 and the other end of diode D1 are grounded, electricity
The other end of resistance R14 is connect with the drain electrode of field-effect tube Q4；
The source electrode of field-effect tube Q4 is grounded, and grid is connect with resistance R16, the other end of resistance R16 and resistance R21 and three poles
The emitter of pipe Q6 connects, the other end ground connection of resistance R21；
The collector of triode Q6 is connect with+12V power supply, and base stage is connect with resistance R22 and resistance R23, and resistance R22's is another
One end is connect with STC15F2K60S2 chip, the other end ground connection of resistance R23.
The utility model has the beneficial effect that
(1) control circuit provided by the utility model can make the wire feed rate of gas-shielded welder in gas-shielded welder work
Change with the variation of floating voltage, eliminates the process for adjusting wire feed rate repeatedly；
(2) control circuit provided by the utility model, in voltage ripple of power network, can with the fluctuation of network voltage,
Timely automated adjusting wire feed rate realizes instant voltage and the mutually matched state of instant wire feed rate, so as to reach most
Good welding effect；
(3) control circuit provided by the utility model can change built-in wire feed rate by peripheral operation.
Detailed description of the invention
Fig. 1 is that the gas shield welding provided by the utility model that wire feed rate can be made to change with floating voltage and changed controls electricity
The composition schematic diagram on road；
Fig. 2 is that the gas shield welding provided by the utility model that wire feed rate can be made to change with floating voltage and changed controls electricity
The circuit diagram of one specific embodiment on road.
Specific embodiment
Gas shield welding control circuit provided by the utility model can make the wire feed of gas-shielded welder in gas-shielded welder work
Speed changes with floating voltage and is changed.
To keep the above-mentioned technical proposal of the utility model more obvious and easy to understand, in the following with reference to the drawings and specific embodiments
Detailed introduction is done to the utility model.
Referring to Fig.1, the gas shield welding control provided by the utility model that wire feed rate can be made to change with floating voltage and changed
Circuit processed includes: main loop circuit, output current collection circuit, output voltage Acquisition Circuit, data processing circuit, parameter input
Circuit, display circuit, ac contactor control circuit, solenoid valve control circuit and wire feed rate control circuit.
Each circuit is further described in detail below.
1, main loop circuit
Referring to Figures 1 and 2, main loop circuit by A.C. contactor, change-over switch, transformer T and low-voltage rectifier D successively
It connects and composes, and the V+ output end of low-voltage rectifier D is connected with reactor L1, the V- output end of low-voltage rectifier D is connected with
Current sensor.
2, current collection circuit is exported
Referring to Fig.1, output current collection circuit is connect with main loop circuit, for acquiring the output electricity of main loop circuit
Stream.
As a preferred solution, referring to Fig. 2, current collection circuit is exported by 5 resistance (resistance R5, resistance R6, electricity
Hinder R7, resistance R8, resistance R9), 2 capacitors (capacitor C1, capacitor C2), 1 voltage amplifier (voltage amplifier U4A) and 1
Voltage follower (voltage follower U4B) composition.
Resistance R5 and capacitor C1 are connect with the non-inverting input terminal of voltage amplifier U4A.
Resistance R6 and resistance R7 are connect with the inverting input terminal of voltage amplifier U4A.
The other end and resistance R8 of resistance R7 is connect with the output end of voltage amplifier U4A.
The other end of resistance R5 and the output negative pole of main loop circuit connect, and tie point is located at the output of current sensor
End.
The other end of capacitor C1 and the other end of resistance R6 are grounded.
The non-inverting input terminal of voltage follower U4B is connect with the other end of resistance R8.
The inverting input terminal of voltage follower U4B is connect with output end.
Resistance R9 is connected with capacitor C2, and the other end of resistance R9 is connect with the output end of voltage follower U4B, capacitor C2's
The tie point of other end ground connection, resistance R9 and capacitor C2 are the output ends of the output current collection circuit, output end output
It is that signal DL is denoted as by the size of the electric current after current sensor, signal DL is eventually transferred to data processing circuit, specifically
It is that STC15F2K60S2 chip is transferred to by P1.2/ADC2/SS/ECI pin.
3, output voltage Acquisition Circuit
Referring to Fig.1, output voltage Acquisition Circuit is also connect with main loop circuit, for acquiring the output electricity of main loop circuit
Pressure.
As a preferred solution, referring to Fig. 2, output voltage Acquisition Circuit by 4 resistance (resistance R10, resistance R11,
Resistance R12, resistance R13), 2 capacitors (capacitor C3, capacitor C4) and 2 voltage followers (voltage follower U5A, voltage follow
Device U5B) composition.
Resistance R10, resistance R11 and capacitor C3 are connect with the non-inverting input terminal of voltage follower U5A.
The other end of resistance R10 and the output cathode of main loop circuit connect.
The other end of resistance R11 and the other end of capacitor C3 are grounded.
The inverting input terminal of voltage follower U5A is connect with output end.
The both ends of resistance R12 connect with the non-inverting input terminal of the output end of voltage follower U5A, voltage follower U5B respectively
It connects.
The inverting input terminal of voltage follower U5B is connect with output end.
Resistance R13 is connected with capacitor C4, and the other end of resistance R13 is connect with the output end of voltage follower U5B, capacitor C4
Other end ground connection, the tie point of resistance R13 and capacitor C4 are the output end of the output voltage Acquisition Circuit, output end output
Be main loop circuit output end voltage swing, be denoted as signal DY, signal DY is finally also to be transferred to data processing circuit, tool
Body is to be transferred to STC15F2K60S2 chip by P1.3/ADC3/MOSI pin.
4, data processing circuit
Referring to Fig.1, data processing circuit receives and processes data using STC15F2K60S2 chip, while output phase is answered
Control signal, what STC15F2K60S2 chip was specifically received and was handled is output current collection circuit and output voltage acquisition electricity
The output electric current and output voltage of the main loop circuit of road acquisition, what is specifically exported is to be respectively intended to control A.C. contactor to open
It closes, three signals of solenoid valve opening and closing and wire-feed motor wire feed rate, wherein be denoted as controlling the signal of A.C. contactor opening and closing
Signal JCQ is controlled, control signal DCF is denoted as controlling the signal of solenoid valve opening and closing, for controlling wire-feed motor wire feed rate
Signal is denoted as control signal PWM.
5, parameter input circuit, display circuit
Referring to Fig.1, parameter input circuit and display circuit are connect with data processing circuit, are respectively intended to data processing
The parameter of parameter and display input is inputted in circuit.
Referring to Fig. 2, parameter input circuit includes: manual-automatic switch S1, rifle switch S4 etc., wherein rifle switch S4
With 2T -4T mode, different modes of operation may be implemented, it is user-friendly.
When the wire feed rate of wire feed rate and user's actual use built in data processing circuit has difference, can pass through
Peripheral operation changes built-in wire feed rate, thus user-friendly.
6, ac contactor control circuit
Referring to Fig.1, ac contactor control circuit is connect with STC15F2K60S2 chip, in output end and main loop circuit
A.C. contactor connection, for controlling the opening and closing of A.C. contactor.
As a preferred solution, referring to Fig. 2, ac contactor control circuit is by resistance R1, resistance R2, triode Q1
It is formed with relay K1.
Resistance R1 and resistance R2 are connect with the base stage of triode Q1.
The other end of resistance R1 is the input terminal of the ac contactor control circuit, is connected with STC15F2K60S2 chip
It connects, is connect especially by P1.0/ADC0/CCP1/RXD2 pin with STC15F2K60S2 chip, receive STC15F2K60S2 chip
The control signal JCQ of sending is used to control the signal of the A.C. contactor opening and closing in main loop circuit.
The other end of resistance R2 is grounded.
The collector of triode Q1 is connect with the input terminal of relay K1.
The output end of relay K1 is the output end of the ac contactor control circuit, with exchanging in main loop circuit
Contactor connection.
The emitter of triode Q1 is grounded.
7, solenoid valve control circuit
Referring to Fig.1, solenoid valve control circuit is also connect with STC15F2K60S2 chip, output end and protection letter shoot road
On solenoid valve connection, for controlling the opening and closing of solenoid valve, that is, the on-off of control protection gas.
As a preferred solution, referring to Fig. 2, solenoid valve control circuit by resistance R3, resistance R4, triode Q2 and after
Electric appliance K2 composition.
Resistance R3 and resistance R4 are connect with the base stage of triode Q2.
The other end of resistance R3 is the input terminal of the solenoid valve control circuit, is connect with STC15F2K60S2 chip, tool
Body is connect by P1.1/ADC1/CCP0/TXD2 pin with STC15F2K60S2 chip, is received STC15F2K60S2 chip and is issued
Control signal DCF, that is, be used to control protection letter shoot road on solenoid valve F opening and closing signal.
The other end of resistance R4 is grounded.
The collector of triode Q2 is connect with the input terminal of relay K2.
The output end of relay K2 is the output end of the solenoid valve control circuit, with the electromagnetism on protection letter shoot road
Valve F connection.
The emitter of triode Q2 is grounded.
8, wire feed rate control circuit
Referring to Fig.1, wire feed rate control circuit is also connect with STC15F2K60S2 chip, and output end is connect with wire-feed motor,
For controlling the wire feed rate of wire-feed motor.
As a preferred solution, referring to Fig. 2, wire feed rate control circuit is by 10 resistance (resistance R14, resistance
R15, resistance R16, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance R22, resistance R23), 2 three poles
Manage (triode Q5, triode Q6), 2 field-effect tube (field-effect tube Q3, field-effect tube Q4) and 1 diode (diode D1)
Composition.
Resistance R19 and resistance R20 are connect with the base stage of triode Q5.
The other end of resistance R19 is an input terminal of the wire feed rate control circuit, with STC15F2K60S2 chip
Connection, connect especially by P5.4/RST/MCLKO/SS_3 pin with STC15F2K60S2 chip, receives STC15F2K60S2 core
The control signal PWM that piece issues is used to control the signal of the wire feed rate of wire-feed motor.
The other end of resistance R20 is grounded.
The collector of triode Q5 is connect with+12V power supply, and emitter is connect with resistance R15 and resistance R18.
The other end of resistance R15 is connect with the grid of field-effect tube Q3.
The other end of resistance R18 is grounded.
The drain electrode of field-effect tube Q3 is connect with+24V power supply, and source electrode and resistance R14, diode D1 and wire-feed motor motor connect
It connects.
The other end of wire-feed motor motor is connect with resistance R17, and the other end of resistance R17 and the other end of diode D1 connect
Ground.
The other end of resistance R14 is connect with the drain electrode of field-effect tube Q4.
The source electrode of field-effect tube Q4 is grounded, and grid is connect with resistance R16.
The other end of resistance R16 is connect with the emitter of resistance R21 and triode Q6.
The other end of resistance R21 is grounded.
The collector of triode Q6 is connect with+12V power supply, and base stage is connect with resistance R22 and resistance R23.
The other end of resistance R23 is grounded.
The other end of resistance R22 is another input terminal of the wire feed rate control circuit, with STC15F2K60S2 core
Piece connection, connect especially by P5.5 pin with STC15F2K60S2 chip, receives being used to for STC15F2K60S2 chip sending
The signal of wire-feed motor brake, i.e. brake control signal are controlled, control signal SC is denoted as.
Using before gas-shielded welder, first gas-shielded welder is given to be powered, is then closed power switch, make gas-shielded welder be in
Machine state, later can the working method to gas-shielded welder select.
(1) under the mode of automatic -2T
Rifle switch S4 is pressed, the solenoid valve F being mounted on protection letter shoot road is attracted, and starts to supply gas, then major loop
A.C. contactor in circuit is attracted, and three-phase input voltage generates a sky after transformer T decompression and low-voltage rectifier D rectification
Voltage is carried, this floating voltage is after the processing of output voltage Acquisition Circuit, and into data processing circuit, data processing circuit is to master
After the voltage swing of loop circuit output is identified, export the adjustable pwm signal of duty ratio, the pwm signal be for
Wire-feed motor work is driven, data processing circuit exports the pwm signal of different duty according to the difference of output voltage, realizes
Wire feed rate can change with the variation of floating voltage, eliminate the process for adjusting wire feed rate.
After welding, rifle switch S4 is unclamped, the braking circuit of wire-feed motor first works, realizes the emergency stop of wire-feed motor, connect
A.C. contactor in main loop circuit disconnect, so that main loop circuit is stopped externally output, be finally mounted on protection gas conveying
Solenoid valve F on pipeline is disconnected, to play the protective effect to welding bead.
(2) under automatic -4T mode
Rifle switch S4 is pressed, the solenoid valve F being mounted on protection letter shoot road is attracted, and starts to supply gas, then major loop
A.C. contactor in circuit is attracted, and three-phase input voltage exports one after transformer T decompression and low-voltage rectifier D rectification
Floating voltage, this floating voltage is after the processing of output voltage Acquisition Circuit, into data processing circuit, data processing circuit pair
After this floating voltage is identified, input one is suitble to the wire feed rate of this voltage, after unclamping rifle switch S4, keeps original work
Make state, after pressing rifle switch S4 again, ac contactor control circuit, solenoid valve control circuit and wire feed rate control circuit
Continue to keep original working condition, after unclamping rifle switch S4 again, the braking circuit of wire-feed motor first works, and realizes wire-feed motor
Emergency stop, then the A.C. contactor in main loop circuit disconnects, and so that main loop circuit is stopped externally output, is finally mounted on protection
Solenoid valve F on letter shoot road is disconnected, and plays the protective effect to welding bead.
(3) under manually -2T mode
The potentiometer RT1 of first adjustment parameter input circuit presets a wire feed rate according to the gear of change-over switch, then
It presses rifle switch S4 to be welded, protects solenoid valve F, the A.C. contactor in main loop circuit, wire feed on letter shoot road
The machine course of work is identical as automatic -2T mode, stops welding after unclamping rifle switch S4.
(4) under manually -4T mode
The potentiometer RT1 of first adjustment parameter input circuit presets a wire feed rate according to the gear of change-over switch, then
It presses rifle switch S4 to be welded, protects solenoid valve F, the A.C. contactor in main loop circuit, wire feed on letter shoot road
The machine course of work is identical as automatic -4T mode, after unclamping rifle switch S4, protects solenoid valve F, the major loop electricity on letter shoot road
A.C. contactor and wire-feed motor in road keep current working condition, after pressing rifle switch S4 again, protect letter shoot road
On solenoid valve F, the A.C. contactor in main loop circuit and wire-feed motor continue keep current working status, again unclamp rifle open
After closing S4, the braking circuit of wire-feed motor first works, and realizes the emergency stop of wire-feed motor, and then the A.C. contactor in main loop circuit is disconnected
It opens, main loop circuit is made to stop externally output, finally protect the disconnected F of the solenoid valve on letter shoot road to open, play the guarantor to welding bead
Shield effect.
In addition, when voltage ripple of power network, the output voltage of main loop circuit also can with network voltage fluctuation together
Fluctuation, at this point, the output voltage of output voltage Acquisition Circuit acquisition main loop circuit, determines the output voltage of main loop circuit
Size, and the voltage signal of acquisition is transferred to data processing circuit (i.e. STC15F2K60S2 chip), data processing circuit root
Different wire feed rate control signals is exported according to the difference of output voltage, so that gas-shielded welder can be with network voltage
Fluctuation, timely automated adjusting wire feed rate realizes instant voltage and the mutually matched state of instant wire feed rate, to reach
Best welding effect.
It should be noted that above-described embodiment does not limit the utility model in any form, it is all to use equivalent replacement or wait
The mode technical solution obtained for imitating transformation, all falls in the protection scope of the utility model.
Claims (6)
1. the gas shield welding control circuit that one kind can be such that wire feed rate changes with floating voltage variation, which is characterized in that the gas
Protecting weldering control circuit includes: main loop circuit, output current collection circuit, output voltage Acquisition Circuit, data processing circuit, ginseng
Number input circuit, display circuit, ac contactor control circuit, solenoid valve control circuit and wire feed rate control circuit, in which:
The main loop circuit is sequentially connected by A.C. contactor, change-over switch, transformer and low-voltage rectifier and is constituted, and low
Reactor and current sensor is also respectively connected in the V+ output end and V- output end for pressing rectifier；
The output current collection circuit and output voltage Acquisition Circuit are connect with main loop circuit, are respectively intended to acquisition and are led back
The output electric current and output voltage of road circuit；
The parameter input circuit and display circuit are connect with data processing circuit, are respectively intended to defeated into data processing circuit
Enter the parameter of parameter and display input；
The data processing circuit receives and processes output current collection circuit and output electricity using STC15F2K60S2 chip
The electric current and voltage of Acquisition Circuit acquisition are pressed, output is respectively intended to the opening and closing of control A.C. contactor, solenoid valve opening and closing and wire-feed motor
Three signals of wire feed rate；
The ac contactor control circuit, solenoid valve control circuit and wire feed rate control circuit with STC15F2K60S2 core
Piece connection, output end connect with the A.C. contactor in main loop circuit, the solenoid valve on protection letter shoot road, wire-feed motor respectively
It connects.
2. the gas shield welding control circuit according to claim 1 that wire feed rate can be made to change with floating voltage and changed,
It is characterized in that, the output current collection circuit is by 5 resistance, 2 capacitors, 1 voltage amplifier and 1 voltage follower
Composition, in which:
Resistance R5 and capacitor C1 are connect with the non-inverting input terminal of voltage amplifier U4A, and resistance R6 and resistance R7 are put with voltage
The inverting input terminal connection of big device U4A, the other end and resistance R8 of resistance R7 are connect with the output end of voltage amplifier U4A,
The connection of the output negative pole of the other end of resistance R5 and main loop circuit and tie point are located at the output end of current sensor, capacitor C1
It is grounded with the other end of resistance R6；
The non-inverting input terminal of voltage follower U4B is connect with the other end of resistance R8, and inverting input terminal is connect with output end；
Resistance R9 is connected with capacitor C2, and the other end of resistance R9 is connect with the output end of voltage follower U4B, and capacitor C2's is another
The tie point of end ground connection, resistance R9 and capacitor C2 are the output ends of the output current collection circuit.
3. the gas shield welding control circuit according to claim 1 that wire feed rate can be made to change with floating voltage and changed,
It is characterized in that, the output voltage Acquisition Circuit is made of 4 resistance, 2 capacitors and 2 voltage followers, in which:
Resistance R10, resistance R11 and capacitor C3 are connect with the non-inverting input terminal of voltage follower U5A, the other end of resistance R10
It is connect with the output cathode of main loop circuit, the other end of resistance R11 and capacitor C3 are grounded, the reverse phase of voltage follower U5A
Input terminal is connect with output end；
The both ends of resistance R12 are connect with the non-inverting input terminal of the output end of voltage follower U5A, voltage follower U5B respectively, electricity
The inverting input terminal of pressure follower U5B is connect with output end；
Resistance R13 is connected with capacitor C4, and the other end of resistance R13 is connect with the output end of voltage follower U5B, and capacitor C4's is another
The tie point of one end ground connection, resistance R13 and capacitor C4 are the output ends of the output voltage Acquisition Circuit.
4. the gas shield welding control circuit according to claim 1 that wire feed rate can be made to change with floating voltage and changed,
It is characterized in that, the ac contactor control circuit is made of resistance R1, resistance R2, triode Q1 and relay K1, in which:
Resistance R1 and resistance R2 are connect with the base stage of triode Q1, and the other end and STC15F2K60S2 chip of resistance R1 connects
It connects, the other end ground connection of resistance R2；
The collector of triode Q1 is connect with the input terminal of relay K1, the friendship in the output end and main loop circuit of relay K1
Flow contactor connection；
The emitter of triode Q1 is grounded.
5. the gas shield welding control circuit according to claim 1 that wire feed rate can be made to change with floating voltage and changed,
It is characterized in that, the solenoid valve control circuit is made of resistance R3, resistance R4, triode Q2 and relay K2, in which:
Resistance R3 and resistance R4 are connect with the base stage of triode Q2, and the other end and STC15F2K60S2 chip of resistance R3 connects
It connects, the other end ground connection of resistance R4；
The collector of triode Q2 is connect with the input terminal of relay K2, on the output end and protection letter shoot road of relay K2
Solenoid valve connection；
The emitter of triode Q2 is grounded.
6. the gas shield welding control circuit according to claim 1 that wire feed rate can be made to change with floating voltage and changed,
It is characterized in that, the wire feed rate control circuit is by 10 resistance, 2 triodes, 2 field-effect tube and 1 diode group
At, in which:
Resistance R19 and resistance R20 are connect with the base stage of triode Q5, the other end and STC15F2K60S2 chip of resistance R19
Connection, the other end ground connection of resistance R20；
The collector of triode Q5 is connect with+12V power supply, and emitter is connect with resistance R15 and resistance R18, and resistance R15's is another
End is connect with the grid of field-effect tube Q3, the other end ground connection of resistance R18；
The drain electrode of field-effect tube Q3 is connect with+24V power supply, and source electrode is connect with resistance R14, diode D1 and wire-feed motor motor,
The other end of wire-feed motor motor is connect with resistance R17, and the other end of resistance R17 and the other end of diode D1 are grounded, resistance
The other end of R14 is connect with the drain electrode of field-effect tube Q4；
The source electrode of field-effect tube Q4 is grounded, and grid is connect with resistance R16, the other end and resistance R21 and triode Q6 of resistance R16
Emitter connection, resistance R21 the other end ground connection；
The collector of triode Q6 is connect with+12V power supply, and base stage is connect with resistance R22 and resistance R23, the other end of resistance R22
It is connect with STC15F2K60S2 chip, the other end ground connection of resistance R23.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920163456.8U CN209664537U (en) | 2019-01-30 | 2019-01-30 | The gas shield welding control circuit that wire feed rate can be made to change with floating voltage and changed |
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| CN201920163456.8U CN209664537U (en) | 2019-01-30 | 2019-01-30 | The gas shield welding control circuit that wire feed rate can be made to change with floating voltage and changed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319226A (en) * | 2022-08-04 | 2022-11-11 | 吴忠市黄河电焊机有限公司 | Voltage stabilizing system and digital gas shielded welding machine with same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319226A (en) * | 2022-08-04 | 2022-11-11 | 吴忠市黄河电焊机有限公司 | Voltage stabilizing system and digital gas shielded welding machine with same |
| CN115319226B (en) * | 2022-08-04 | 2024-04-05 | 吴忠市黄河电焊机有限公司 | Voltage stabilizing system and digital gas shielded welding machine with same |
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