CN103769721B - The accurate short circuiting transfer control circuit of arc welding based on AVR single chip - Google Patents
The accurate short circuiting transfer control circuit of arc welding based on AVR single chip Download PDFInfo
- Publication number
- CN103769721B CN103769721B CN201410040940.3A CN201410040940A CN103769721B CN 103769721 B CN103769721 B CN 103769721B CN 201410040940 A CN201410040940 A CN 201410040940A CN 103769721 B CN103769721 B CN 103769721B
- Authority
- CN
- China
- Prior art keywords
- circuit
- single chip
- avr single
- resistance
- pin
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
- B23K9/1056—Power supply characterised by the electric circuit by using digital means
- B23K9/1062—Power supply characterised by the electric circuit by using digital means with computing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0953—Monitoring or automatic control of welding parameters using computing means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Generation Of Surge Voltage And Current (AREA)
- Arc Welding Control (AREA)
Abstract
The invention provides the accurate short circuiting transfer control circuit of a kind of arc welding based on AVR single chip, it includes: current sampling circuit, voltage sampling circuit, AVR single chip, D/A change-over circuit, Setting signal commutation circuit and proportional integral circuit.The present invention utilizes analog circuit to realize the in real time accurately sampling of welding current, weldingvoltage, and the real-time accurate Calculation of voltage change ratio in welding wire short circuit transition, then by these signals input AVR single chip; AVR single chip is according to the signal of feedback, calculate and Logic judgment through PID, the size of droplet transfer each stage Setting signal and opening in real time and shutoff of copped wave pipe in real-time control welding process, thus achieve the accurate control in droplet transfer in each stage in welding process, effectively control the transition frequency of molten drop in welding process, input the size of amount of heat and splashing, meet the high request of user to welding performance.
Description
Technical field
The present invention relates to welding machine, what be specifically related to is the accurate short circuiting transfer control circuit of a kind of arc welding based on AVR single chip.
Background technology
The welding control system of traditional electrical welding machine relies on complicated analog circuit to come practical function and logic control, all needs to increase a lot of electronic devices and components even if increase a kind of simple function.If welding machine will possess two or more welding functions just need a lot of circuit board, so not only can increase substantially welding machine cost, and the welding performance of welding machine and reliability also sharply can decline with the increase of components and parts, so traditional welding machine is difficult to multiple welding function synthesized in a welding machine.
Along with the development of digital technology, very much progress is there has also been in the application in welding machine field, the welding machine of digitlization panel and so-called digital welding machine are there is, what this kind of welding machine had just carries out digital improvement by the regulating system of welding parameter, the welding control system of welding machine remains and realizes by many simulations and logic circuit, and what have is then the regulating system of welding parameter and simple function are controlled all to use software simulating.This kind of welding machine parameter is easy to adjust, function many (than if any welding machine has coating manual welding, DC argon arc welding, pulsed argon arc welding, argon arc spot welding, gas protects the welding manner such as weldering, carbon arc air gouging), but often kind of welding performance of welding machine but can only reach general level, present welding profession can not be met to welding procedure and the more and more higher requirement of welding performance.
Welding control system for traditional electrical welding machine and digitlization panel welding machine realizes by many analog circuits, exist and increase welding function difficulty, the shortcomings such as the reliability of welding machine is low, homogeneity of product is poor, digitizing technique is inexorable trend in the application in welding machine field.Although but simple digital improvement can have certain help in simplification circuit and increase function etc., fundamentally can not improve the welding performance of welding machine.
Along with the development of science and technology, various new material continues to bring out, and change with rapid changepl. never-ending changes and improvements also occurs welding procedure, and traditional welding machine and welding procedure can not adapt to the needs of the times.And in welding process the droplet transfer be a complicated dynamic process, can change along with the change of the external condition such as environment, material, a set of fixing parameter can not be leaned on to complete the accurate control of whole Welding Molten Drop transient process, need real-time sampling output parameter to feed back to control system and revise Setting signal in real time.
Summary of the invention
For this reason, the object of the present invention is to provide the accurate short circuiting transfer control circuit of a kind of arc welding based on AVR single chip, to realize the accurate control of molten drop transition frequency in welding process, input amount of heat and splashing size.
The object of the invention is to be achieved through the following technical solutions.
The accurate short circuiting transfer control circuit of arc welding based on AVR single chip, comprising:
One AVR single chip IC6;
One current sampling circuit, be connected with welding machine, for sampling to the real-time current of welding process short-and-medium road transition stage, and the current feedback signal of stable output is to AVR single chip, and it comprises inductance L 1, sampling resistor R21, filter capacitor C6, discharge circuit and the first active filter circuit, described discharge circuit is made up of resistance R14, R15, R16, R17 and operational amplifier IC3C, described first active filter circuit is made up of resistance R10, R11, R12, R13, electric capacity C4, C5 and active filter IC3D, described welding current sampled signal is by after inductance L 1 filtering and sampling resistor R21, be converted into voltage signal, then elementary filtering is carried out by filter capacitor C6, afterwards again through discharge circuit and the further filtering of the first active filter circuit, export the current feedback signal that two-way is stable, one tunnel is input to proportional integral circuit and carries out real-time proportional integral calculating, another road is through resistance R9, AVR single chip IC6-39 pin is input to after electric capacity C12 filtering process, Real-time Logic judgement and PID arithmetic is carried out by AVR single chip IC6, to obtain revised real-time current set-point,
One voltage sampling circuit, is connected with welding machine, and for sampling to the real-time voltage of welding process short-and-medium road transition stage, and the voltage feedback signal of stable output is to AVR single chip; It comprises difference channel, the second active filter circuit, resistance R47 and electric capacity C28, described differential electrical routing resistance R45, R58, R6, R59, R57, R55, R60 and IC5C composition; Described second active filter circuit is made up of resistance R56, R75, R77, R76, C34, C35 and IC5B; The output voltage of described welding machine, arc voltage lead to input difference circuit and carry out elementary filtering and the reduction of voltage magnitude ratio, again through the voltage feedback signal of the second active filter circuit filtering stable output, this voltage feedback signal is input to AVR single chip IC6-40 pin after resistance R47 and electric capacity C28 filtering, obtains short circuiting transfer phase judgement accurately after carrying out Real-time Logic judgement;
One D/A change-over circuit, comprise D/A conversion chip IC4, the IC4-1 pin of described D/A conversion chip is connected with AVR single chip IC6-19 pin by resistance R63, IC4-2 pin is connected with AVR single chip IC6-20 pin by resistance R64, IC4-3 pin is connected with AVR single chip IC6-4 pin by resistance R65, the data signal that described D/A conversion chip is used for short circuiting transfer peak current value and the background current value exported in each control stage of AVR single chip is converted to analog signal, and exporting background current signal by IC4-4, IC4-7 exports peak-current signal;
One Setting signal commutation circuit, comprise the first filtering and power amplification circuit, the first electronic switch IC1D, the second filtering and power amplification circuit and the second electronic switch IC1C, described first filtering and power amplification circuit are made up of R33, C21, IC2A; Described second filtering and power amplification circuit are made up of resistance R34, electric capacity C22 and IC2B; The IC4-7 of described D/A change-over circuit exports peak-current signal after the first filtering and power amplification circuit, accesses the first electronic switch IC1D; The second electronic switch IC1C is accessed after IC4-4 output background current signal second filtering of described D/A change-over circuit and power amplification circuit; Described AVR single chip IC6-22 pin exports conducting and the disconnection of peak point current switch-over control signal control IC1D, IC6-23 pin exports conducting and the disconnection that background current switch-over control signal controls electronic switch IC1C, to export the real-time Setting signal of peak current value and background current value;
One proportional integral circuit, comprise resistance R4, R8, electric capacity C3 and IC2C, the real-time Setting signal access proportional integral circuit of described peak current value and background current value, the real-time current value of feedback accessed with resistance R20, adjustable potentiometer W2 again carries out proportional integral computing, and operation values outputs to IGBT drive circuit by IC2-8 pin and carries out PWM and control.
Preferably, be also connected with a reverse amplification circuit between described Setting signal commutation circuit and proportional integral circuit, this reverse amplification circuit is made up of resistance R30, R29, R3 and IC2D.
Preferably, in described current sampling circuit, inductance L 1 is connected with welding machine by wiring P2-3 and a current sensor, and carries out real-time sampling by the electric current in short circuiting transfer stage in described current sensor butt welding machine welding process.
Preferably, in described current sampling circuit, electric capacity C12 is also parallel with one for revising the adjustable potentiometer W4 of AVR single chip systematic parameter error.
Preferably, the output voltage of described welding machine passes through the difference channel of wiring P4-4, P4-5 input voltage sample circuit, and the arc voltage of described welding machine is input to the difference channel of voltage sampling circuit by wiring P4-9, P4-10.
Preferably, also include one and open or turn off copped wave pipe to control the copped wave pipe control circuit of splashing size for the signal provided according to AVR single chip.
The present invention utilizes analog circuit to realize the in real time accurately sampling of welding current, weldingvoltage, and the real-time accurate Calculation of voltage change ratio in welding wire short circuit transition, then by these signals input AVR single chip; AVR single chip is according to the signal of feedback, calculate and Logic judgment through PID, the size of droplet transfer each stage Setting signal and opening in real time and shutoff of copped wave pipe in real-time control welding process, thus achieve the accurate control in droplet transfer in each stage in welding process, effectively control the transition frequency of molten drop in welding process, input the size of amount of heat and splashing, meet the high request of user to welding performance.
Accompanying drawing explanation
Fig. 1 is circuit control principle block diagram of the present invention;
Fig. 2 is current sampling circuit schematic diagram of the present invention;
Fig. 3 is voltage sampling circuit schematic diagram of the present invention;
Fig. 4 is D/A change-over circuit schematic diagram of the present invention;
Fig. 5 is Setting signal commutation circuit of the present invention and proportional integral circuit theory diagrams.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to shown in Fig. 1, Fig. 1 is circuit control principle block diagram of the present invention.The invention provides the accurate short circuiting transfer control circuit of a kind of arc welding based on AVR single chip, it cannot realize the accurate problem controlled mainly for current welding machine molten drop transition frequency, input amount of heat and splashing size etc. in welding process.
The present invention is also to solve traditional electrical welding machine and digitlization panel welding machine, circuit structure is complicated, reliability is low, homogeneity of product is poor, increase welding function difficulty, the problem that welding performance is low.
Specific to the embodiment of the present invention, it includes current sampling circuit 1, voltage sampling circuit 2, AVR single chip 3, welding machine vision-control panel 4, D/A change-over circuit 5, copped wave pipe control circuit 6, Setting signal commutation circuit 7, proportional integral circuit and IGBT drive circuit 8.
Wherein current sampling circuit 1 is connected with welding machine, and for sampling to the real-time current of welding process short-and-medium road transition stage, and the current feedback signal of stable output is to AVR single chip; Voltage sampling circuit 2 is connected with welding machine, and for sampling to the real-time voltage of welding process short-and-medium road transition stage, and the voltage feedback signal of stable output is to AVR single chip; Welding machine vision-control panel is connected with AVR single chip, regulates for the selection of welding machine function, parameter and shows in real time; D/A change-over circuit 5 is connected with AVR single chip, for AVR single chip is converted to analog signal at each control peak current value of stage output short-circuit transition and the data signal of background current value; Copped wave pipe control circuit 6 is connected with AVR single chip, for the signal provided according to AVR single chip, opens or turn off copped wave pipe, to reach the object accurately controlling splashing size; Setting signal commutation circuit 7 is connected with D/A change-over circuit 5 with proportional integral circuit, described Setting signal commutation circuit 7 exports corresponding switch-over control signal for the peak current value that inputs according to D/A change-over circuit 5 and background current value signal, to export the Setting signal of real-time stabilization to proportional integral circuit, passing ratio integrating circuit carries out proportional integral computing, and generates operation values and output to IGBT drive circuit 8; Described IGBT drive circuit 8 is connected with proportional integral circuit, it mainly carries out PWM control according to the operation values of input to IGBT drive circuit, to reach the ON time of accurate power control IGBT, reach the energy input quantity accurately controlling short circuiting transfer each stage in welding process, thus realize stable short circuiting transfer.
Shown in Figure 2, Fig. 2 is current sampling circuit schematic diagram of the present invention.Current sampling circuit of the present invention is actual is welding current real-time sampling and feedback circuit, and it includes inductance L 1, sampling resistor R21, filter capacitor C6, discharge circuit, the first active filter circuit, resistance R9, electric capacity C12 and adjustable potentiometer W4.Discharge circuit is by resistance R14, R15, R16, R17 and operational amplifier IC3C forms, resistance R14 and R17 one end are connected to operational amplifier IC3C-10 pin, and the other end of resistance R14 and R17 is connected to filter capacitor C6 two ends, R15 is connected to operational amplifier IC3C-9 pin, and be connected with resistance R16 between IC3C-9 pin and IC3C-8 pin, current sampling signal is input to the first active filter circuit after IC3C-8 pin, described first active filter circuit is by resistance R10, R11, R12, R13, electric capacity C4, C5 and active filter IC3D forms, described IC3D-12 pin is connected to electric capacity C5 and resistance R12, described resistance R12 is connected with IC3C-8 pin by resistance R13, described IC3D-13 pin is connected with resistance R10, IC3D-14 pin output is divided into three tunnels, and resistance R11 of leading up to is connected with IC3D-13 pin, and electric capacity C4 of leading up to is connected between resistance R12 and R13, also has a road then to output to AVR single chip IC6-39 pin.
Inductance L 1 one end is connected with welding machine by a wiring P2-3 and current sensor, and carries out real-time sampling by the electric current in short circuiting transfer stage in described current sensor butt welding machine welding process; The other end of inductance L 1 is connected with sampling resistor R21, welding current sampled signal is by after inductance L 1 filtering and sampling resistor R21, be converted into voltage signal (the corresponding 1V voltage of 100A output current), and carry out elementary filtering by filter capacitor C6, and then stable current feedback signal is obtained after discharge circuit and the further filtering of the first active filter circuit, exported by IC3D-14 pin.
The current feedback signal that IC3D-14 pin exports is leaded up to current feedback terminal and is outputted to proportional integral circuit and carry out proportional integral calculating, another road then by entering AVR single chip by IC6-39 pin after R9, C12 filtering, in SCM system, carry out Real-time Logic to judge and pid algorithm obtains revised real-time current set-point, adjustable potentiometer W4 is for update the system parameter error.
Shown in Figure 3, Fig. 3 is voltage sampling circuit schematic diagram of the present invention.Voltage sampling circuit of the present invention is actual is weldingvoltage real-time sampling and feedback circuit, it includes difference channel, the second active filter circuit, resistance R47 and electric capacity C28, described differential electrical routing resistance R45, R58, R6, R59, R57, R55, R60 and IC5C composition; Described second active filter circuit is made up of resistance R56, R75, R77, R76, C34, C35 and IC5B.Difference channel IC5C-10 pin is connected with resistance R58 one end, and the resistance R58 other end is connected with resistance R45, and to sample positive wiring P4-10 for being connected welding machine far-end between resistance R45 with resistance R58; Resistance R45 is connected by resistance R60, R59, R57 and IC5C-9 pin, is connected with resistance R65 between IC5C-9 pin and IC5C-8 pin, for being connected the wiring P4-5 of welding machine output cathode between resistance R45 with resistance R60; For connecting the wiring P4-4 of welding machine output negative pole between resistance R60 and R59; For connecting the negative wiring P4-9 of welding machine far-end sampling between resistance R59, R57.IC5C-8 pin output is also connected to the second active filter circuit, and IC5B-5 pin one end of described second active filter circuit is connected with electric capacity C34, and one end is connected to IC5C-8 pin by resistance R75 and R56; IC5B-6 pin then one end is connected to resistance R77, and the other end is connected with IC5B-7 pin by resistance R76, and IC5B-7 pin is leaded up to electric capacity C35 and is connected between resistance R75 and R56, and a road outputs to AVR single chip IC6-40 pin.
Voltage sampling circuit is used for sampling to the real-time voltage of welding process short-and-medium road transition stage, and welding machine output voltage is by wiring P4-4, P4-5 place in circuit, and welding machine arc voltage is by wiring P4-9, P4-10 place in circuit.Voltage after the elementary filtering of difference channel and voltage magnitude ratio reduce, then through the filtering of the second active filter circuit, obtains stable voltage feedback signal, is exported by IC5-7.This voltage feedback signal had both been transferred to dv/dt control circuit and had carried out real-time dv/dt calculating, after R47, C28 filtering, enter AVR single chip by IC6-40 again, carry out Real-time Logic judgement in SCM system after, obtain the judgement in short circuiting transfer stage accurately.
Shown in Figure 4, Fig. 4 is D/A change-over circuit schematic diagram of the present invention.D/A change-over circuit of the present invention, comprise D/A conversion chip IC4, the IC4-1 pin of described D/A conversion chip is connected with the data-signal pin IC6-19 of AVR single chip by resistance R63, IC4-2 pin is connected with the clock signal pin IC6-20 of AVR single chip by resistance R64, IC4-3 pin is connected with the chip selection signal pin IC6-4 of AVR single chip by resistance R65, the data signal that described D/A conversion chip is used for short circuiting transfer peak current value and the background current value exported in each control stage of AVR single chip is converted to analog signal, and export background current signal by IC4-4, IC4-7 exports peak-current signal.
Shown in Figure 5, Fig. 5 is Setting signal commutation circuit of the present invention and proportional integral circuit theory diagrams.Wherein Setting signal commutation circuit, include the first filtering and power amplification circuit, the first electronic switch IC1D, the second filtering and power amplification circuit and the second electronic switch IC1C, described first filtering and power amplification circuit are made up of R33, C21, IC2A; IC2A-3 pin is leaded up to resistance R33 and is connected to set output terminal with the peak value of D/A change-over circuit, leads up to electric capacity C21 ground connection; IC2A-1 pin is connected with IC2A-2 pin, and IC2A-1 pin is connected to the first electronic switch IC1D, and described first electronic switch IC1D switches output IC6-22 pin by resistance R31 with the peak value of AVR single chip and is connected; Described second filtering and power amplification circuit are made up of resistance R34, electric capacity C22 and IC2B; IC2B-5 pin is leaded up to resistance R34 and is connected to set output terminal with the base value of D/A change-over circuit, leads up to electric capacity C22 ground connection; IC2B-6 pin is connected with IC2B-7 pin, and IC2B-7 pin is also connected to the second electronic switch IC1C, and the second electronic switch IC1C is switched output IC6-23 pin with the base value of AVR single chip be connected by resistance R28.
The real-time Setting signal of peak current value inputs reverse amplification circuit through resistance R30 after the first electronic switch IC1D; The real-time Setting signal of background current value inputs reverse amplification circuit through resistance R29 after the second electronic switch IC1C, described reverse amplification circuit is made up of R30, R29, R3, IC2D, IC2D-12 pin is by resistance R5 ground connection, IC2D-13 pin is connected with resistance R30, R29 respectively, and IC2D-13 pin is also connected with IC2D-14 pin by resistance R3, IC2D-14 pin exports Setting signal to proportional integral computing circuit.
Proportional integral computing circuit is made up of R4, R8, C3, IC2C, IC2C-10 pin is by resistance R60 ground connection, IC2C-9 pin is leaded up to resistance R7 and is connected with described reverse amplification circuit IC2D-14 pin, input real-time Setting signal by IC2D-14 pin, input current feedback signal is then accessed by resistance R20, adjustable potentiometer W2 in another road; Between IC2C-9 pin with IC2C-8 pin, be connected with the resistance R2 and the 3rd electronic switch IC1A that are connected in series, and described 3rd electronic switch IC1A is connected with the IC6-25 pin of AVR single chip, with output short circuit current slope by resistance R32; In addition, between IC2C-9 pin and IC2C-8 pin, be also connected with resistance R4, R8 and electric capacity C3, connect with resistance R4 after described R8 and electric capacity C3 parallel connection.
The real-time Setting signal of peak current value and the real-time Setting signal of background current value after above-mentioned reverse amplification circuit by proportional integral computing circuit that resistance R7 accesses, the real-time current value of feedback accessed with R20, W2 again carries out proportional integral computing, operation values outputs to IGBT drive circuit by IC2-8 and carries out the ON time that PWM controls to reach accurate power control IGBT, to reach the energy input quantity accurately controlling short circuiting transfer each stage in welding process, thus realize stable short circuiting transfer.Whether the short circuit current slop control signal that in circuit, electronic switch IC1A is exported by single-chip microcomputer IC6-25 the access of controlling resistance R2 can reach the effect of control ratio constant, thus changes proportional integral operation values.
In sum, the present invention can realize the accurately real-time output current needed for control, voltage sample feedback circuit, the precondition for whole meticulous accurate control realization, devise single-chip microcomputer real-time Setting signal electronic switch control switching circuit makes short circuiting transfer each stage real-time Setting signal accurately and timely be exported simultaneously, analog circuit and SCM system are carried out efficient combination, thus achieve the accurate control in droplet transfer in each stage in welding process, thus effectively control the transition frequency of molten drop in welding process, the input of heat, the size of splashing, meet the high request of user to welding performance.
The present invention devises the real-time current, the voltage sample control simulation circuit that meet electric welding machine kinetic-control system, for SCM system provides reliable and stable feedback signal, single-chip microcomputer real-time Setting signal electronic switch control switching circuit achieves the timely bumpless transfer of set-point needed for each stage of short-circuiting droplet transition simultaneously.
Present invention achieves the efficient combination of analog circuit and SCM system, learn from other's strong points to offset one's weaknesses, both conventional analog circuits electric welder control circuit system had been solved complicated, can not practical function upgrading shortcoming, solving again ordinary numbers circuit electric welder control system simply pursues multi-functional simply, the shortcoming that welding performance is but very general.And the present invention not only achieves the accurate control in droplet transfer in each stage in welding process, and the SCM program that only can need to upgrade in the continuous renewal process of welding material and welding procedure can complete the upgrading of function.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1., based on the accurate short circuiting transfer control circuit of arc welding of AVR single chip, it is characterized in that, comprising:
One AVR single chip IC6;
One current sampling circuit, comprises inductance L 1, sampling resistor R21, filter capacitor C6, discharge circuit and the first active filter circuit, described discharge circuit is made up of resistance R14, R15, R16, R17 and operational amplifier IC3C, described first active filter circuit is made up of resistance R10, R11, R12, R13, electric capacity C4, C5 and active filter IC3D, wherein welding current sampled signal is by after inductance L 1 filtering and sampling resistor R21, be converted into voltage signal, then elementary filtering is carried out by filter capacitor C6, afterwards again through discharge circuit and the further filtering of the first active filter circuit, export the current feedback signal that two-way is stable, one tunnel is input to proportional integral circuit and carries out real-time proportional integral calculating, another road is through resistance R9, AVR single chip IC6-39 pin is input to after electric capacity C12 filtering process, Real-time Logic judgement and PID arithmetic is carried out by AVR single chip IC6, to obtain revised real-time current set-point,
One voltage sampling circuit, comprises difference channel, the second active filter circuit, resistance R47 and electric capacity C28, described differential electrical routing resistance R45, R58, R6, R59, R57, R55, R60 and IC5C composition; Described second active filter circuit is made up of resistance R56, R75, R77, R76, C34, C35 and IC5B; Wherein the output voltage of welding machine, arc voltage lead to input difference circuit and carry out elementary filtering and voltage magnitude ratio reduces, again through the voltage feedback signal of the second active filter circuit filtering stable output, this voltage feedback signal is input to AVR single chip IC6-40 pin after resistance R47 and electric capacity C28 filtering, obtains short circuiting transfer phase judgement accurately after carrying out Real-time Logic judgement;
One D/A change-over circuit, comprise D/A conversion chip IC4, the IC4-1 pin of described D/A conversion chip is connected with AVR single chip IC6-19 pin by resistance R63, IC4-2 pin is connected with AVR single chip IC6-20 pin by resistance R64, IC4-3 pin is connected with AVR single chip IC6-4 pin by resistance R65, the data signal that described D/A conversion chip is used for short circuiting transfer peak current value and the background current value exported in each control stage of AVR single chip is converted to analog signal, and exporting background current signal by IC4-4, IC4-7 exports peak-current signal;
One Setting signal commutation circuit, comprise the first filtering and power amplification circuit, the first electronic switch IC1D, the second filtering and power amplification circuit and the second electronic switch IC1C, described first filtering and power amplification circuit are made up of R33, C21, IC2A; Described second filtering and power amplification circuit are made up of resistance R34, electric capacity C22 and IC2B; The IC4-7 of described D/A change-over circuit exports peak-current signal after the first filtering and power amplification circuit, accesses the first electronic switch IC1D; The second electronic switch IC1C is accessed after IC4-4 output background current signal second filtering of described D/A change-over circuit and power amplification circuit; Described AVR single chip IC6-22 pin exports conducting and the disconnection of peak point current switch-over control signal control IC1D, IC6-23 pin exports conducting and the disconnection that background current switch-over control signal controls electronic switch IC1C, to export the real-time Setting signal of peak current value and background current value;
One proportional integral circuit, comprise resistance R4, R8, electric capacity C3 and IC2C, the real-time Setting signal access proportional integral circuit of described peak current value and background current value, the real-time current value of feedback accessed with resistance R20, adjustable potentiometer W2 again carries out proportional integral computing, and operation values outputs to IGBT drive circuit by IC2-8 pin and carries out PWM and control.
2. as claimed in claim 1 based on the accurate short circuiting transfer control circuit of arc welding of AVR single chip, it is characterized in that, also be connected with a reverse amplification circuit between described Setting signal commutation circuit and proportional integral circuit, this reverse amplification circuit is made up of resistance R30, R29, R3 and IC2D.
3. as claimed in claim 1 based on the accurate short circuiting transfer control circuit of arc welding of AVR single chip, it is characterized in that, in described current sampling circuit, inductance L 1 is connected with welding machine by wiring P2-3 and a current sensor, and carries out real-time sampling by the electric current in short circuiting transfer stage in described current sensor butt welding machine welding process.
4. as claimed in claim 1 based on the accurate short circuiting transfer control circuit of arc welding of AVR single chip, it is characterized in that, in described current sampling circuit, electric capacity C12 being also parallel with one for revising the adjustable potentiometer W4 of AVR single chip systematic parameter error.
5. as claimed in claim 1 based on the accurate short circuiting transfer control circuit of arc welding of AVR single chip, it is characterized in that, the output voltage of described welding machine passes through the difference channel of wiring P4-4, P4-5 input voltage sample circuit, and the arc voltage of described welding machine is input to the difference channel of voltage sampling circuit by wiring P4-9, P4-10.
6. as claimed in claim 1 based on the accurate short circuiting transfer control circuit of arc welding of AVR single chip, it is characterized in that, also include one and open or turn off copped wave pipe to control the copped wave pipe control circuit of splashing size for the signal provided according to AVR single chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410040940.3A CN103769721B (en) | 2014-01-27 | 2014-01-27 | The accurate short circuiting transfer control circuit of arc welding based on AVR single chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410040940.3A CN103769721B (en) | 2014-01-27 | 2014-01-27 | The accurate short circuiting transfer control circuit of arc welding based on AVR single chip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103769721A CN103769721A (en) | 2014-05-07 |
| CN103769721B true CN103769721B (en) | 2015-08-05 |
Family
ID=50562735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410040940.3A Active CN103769721B (en) | 2014-01-27 | 2014-01-27 | The accurate short circuiting transfer control circuit of arc welding based on AVR single chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103769721B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215512B (en) * | 2015-11-03 | 2017-04-19 | 成都埃森普特科技股份有限公司 | Increment detection method for short-circuit transfer in consumable electrode welding process |
| CN109317785B (en) * | 2018-12-11 | 2020-12-15 | 唐山松下产业机器有限公司 | Welding control method |
| CN109708669B (en) * | 2019-02-28 | 2020-10-02 | 重庆理工大学 | Accelerometer signal processing system and method |
| CN110142486B (en) * | 2019-06-06 | 2021-09-17 | 深圳市普耐尔科技有限公司 | Arc control method and circuit based on single-chip microcomputer PWM generator |
| CN111633301B (en) * | 2020-05-23 | 2022-11-22 | 上海沪工焊接集团股份有限公司 | Differential voltage acquisition and filtering circuit and method of novel multifunctional arc welding machine |
| CN113433839B (en) * | 2021-06-28 | 2022-07-01 | 杭州电子科技大学 | Synchronous rectification Boost converter simulation circuit based on virtual inductor and virtual capacitor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001062565A (en) * | 1999-06-21 | 2001-03-13 | Lincoln Global Inc | Tandem electrode welder and welding method by two electrodes |
| CA2377266A1 (en) * | 2001-04-09 | 2002-10-09 | Lincoln Global, Inc. | System and method for controlling an electric arc welder |
| CN100999037A (en) * | 2007-01-11 | 2007-07-18 | 上海交通大学 | Control method of digital pulse consumable electrode gas protection welding |
| CN101406983A (en) * | 2008-11-19 | 2009-04-15 | 上海沪工电焊机制造有限公司 | Method for controlling CO2 welding machine |
| CN101428368A (en) * | 2008-12-12 | 2009-05-13 | 北京工业大学 | Control method for short-circuiting transfer soldering system |
| CN201860111U (en) * | 2010-11-03 | 2011-06-08 | 武汉理工大学 | Reactance controlling device of dynamic harmonic filter |
| US7968822B2 (en) * | 2005-03-28 | 2011-06-28 | Lincoln Global, Inc. | Arc welding system |
| CN103008835A (en) * | 2012-11-29 | 2013-04-03 | 北京工业大学 | Short circuit transition welding system of coupling arcs and control method thereof |
-
2014
- 2014-01-27 CN CN201410040940.3A patent/CN103769721B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001062565A (en) * | 1999-06-21 | 2001-03-13 | Lincoln Global Inc | Tandem electrode welder and welding method by two electrodes |
| CA2377266A1 (en) * | 2001-04-09 | 2002-10-09 | Lincoln Global, Inc. | System and method for controlling an electric arc welder |
| US7968822B2 (en) * | 2005-03-28 | 2011-06-28 | Lincoln Global, Inc. | Arc welding system |
| CN100999037A (en) * | 2007-01-11 | 2007-07-18 | 上海交通大学 | Control method of digital pulse consumable electrode gas protection welding |
| CN101406983A (en) * | 2008-11-19 | 2009-04-15 | 上海沪工电焊机制造有限公司 | Method for controlling CO2 welding machine |
| CN101428368A (en) * | 2008-12-12 | 2009-05-13 | 北京工业大学 | Control method for short-circuiting transfer soldering system |
| CN201860111U (en) * | 2010-11-03 | 2011-06-08 | 武汉理工大学 | Reactance controlling device of dynamic harmonic filter |
| CN103008835A (en) * | 2012-11-29 | 2013-04-03 | 北京工业大学 | Short circuit transition welding system of coupling arcs and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103769721A (en) | 2014-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103769721B (en) | The accurate short circuiting transfer control circuit of arc welding based on AVR single chip | |
| CN106649927B (en) | FPGA-based real-time simulation combined modeling method for power electronic element | |
| CN103368432B (en) | The modulator approach of flexible DC power transmission modularization multi-level converter and control device | |
| CN109802379A (en) | A kind of DC micro power grid system and its become sagging coefficient control method | |
| CN109240398A (en) | Solar battery array simulator working point control type I-V outer loop control method | |
| CN108631632A (en) | A kind of MMC instant power loss Precise computations based on virtual bridge arm mathematical model | |
| CN102922091B (en) | Digitally-controlled multifunctional inverted arc welding machine | |
| CN106786797B (en) | A kind of control method for the microgrid inverter improving microgrid busbar voltage quality | |
| CN109687412B (en) | Direct current breaker simulation method and device | |
| CN203992755U (en) | The welding machine with the accurate short circuiting transfer control circuit of arc welding based on AVR single-chip microcomputer | |
| CN104615129A (en) | Hardware-in-loop testing device of alternating current servo motor | |
| CN110336267A (en) | A kind of more direct current power spring hierarchical control methods | |
| CN202910439U (en) | Digital control multifunction inverted arc welding machine | |
| CN105259965A (en) | Power supply adapter and power supply adapting method | |
| CN107544610A (en) | A kind of photovoltaic MPPT control method based on MPP voltage regulations and gradient search | |
| CN201853157U (en) | Program-controlled DC (direct current) load discharging circuit | |
| CN202351387U (en) | Photovoltaic cell array simulation system | |
| CN201708573U (en) | Modularization control based electric automobile charger | |
| CN205193504U (en) | Multi -functional electric welding development platform of modularized design | |
| CN109217449A (en) | Power supply device operation method, power supply device and power supply device management system | |
| CN206164345U (en) | Power routing conversion systems | |
| CN206332876U (en) | A kind of electric power system | |
| CN204886208U (en) | Micro-grid distributed power inverter | |
| CN211528620U (en) | Board mode program control voltage bias test circuit of large-scale digital integrated circuit | |
| CN107591792A (en) | A kind of current sharing control method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |