CN103692056A - Multifunctional digital waveform control arc-welding inverter power supply - Google Patents
Multifunctional digital waveform control arc-welding inverter power supply Download PDFInfo
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- CN103692056A CN103692056A CN201310711710.0A CN201310711710A CN103692056A CN 103692056 A CN103692056 A CN 103692056A CN 201310711710 A CN201310711710 A CN 201310711710A CN 103692056 A CN103692056 A CN 103692056A
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- 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
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- 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
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- 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
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/124—Circuits or methods for feeding welding wire
- B23K9/125—Feeding of electrodes
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Abstract
The invention provides a multifunctional digital waveform control arc-welding inverter power supply. The multifunctional digital waveform control arc-welding inverter power supply is characterized by comprising a main circuit, a control circuit and a wire feeder module. The main circuit comprises a three-phase common-mode filtration module, a primary rectification filter module, a high-frequency full-bridge inversion module, a power transformer module and a secondary rectification filter module which are connected in sequence. The control circuit comprises an ARM control system module, a digital panel module, a high-frequency inversion driving module, a voltage-current detecting module and a wire feeder driving module, wherein the digital panel module, the high-frequency inversion driving module, the voltage-current detecting module and the wire feeder driving module are connected with the ARM control system module. By adopting the inverter power supply, a welding machine has excellent consistency, reliability and dynamic response capacity, ensures good stability of a power supply-electric arc system, optimizes utilization of welding electric arc energy, improves the adaptability of the welding machine to different welding materials and welding methods and can obtain high welding quality.
Description
Technical field
The present invention relates to Welding Technology and Equipment technology, specifically refer to a kind of multifunctional digital ripple control arc welding inverter.
Background technology
Compare with traditional welding machine, the plurality of advantages such as that inverter type welder has is energy-efficient, lightweight, volume is little, dynamic property is good, is very beneficial for realizing precise treatment to control, and has become the mainstream development direction of welding equipment technology.But the model of inverter type welder is complicated, adopt simulation control or classical control to be difficult to obtain good control effect.In recent years, along with market butt welding connects improving constantly of automation that production efficiency, product quality and welding produce, intelligent requirements, traditional simulation is controlled welding machine owing to having control circuit complexity, reliability is low, portable poor, precision and stability to electronic devices and components too relies on, cause cost high, control difficulty.In a lot of application scenarios, for reducing to greatest extent production run cost, often need welding machine to possess " a tractor serves several purposes " function.For example, when the light-weight metals such as welding of aluminum, magnesium and alloy material thereof, need to adopt AC wave shape to weld to make full use of the negative electrode fragmentation of electric arc; Meanwhile, for guaranteeing welding procedure quality, need accurately to control the heat input of welding process, this just requires welding machine to carry out meticulous adjusting to current-voltage waveforms such as the frequency of alternating current, amplitude and positive and negative half-wave dutycycles; If there is at the scene the weldment of multiple material, may need to adopt the various welding methods such as TIG, MIG, ac square wave.Therefore, be badly in need of butt welding machine power supply and improve, improve its accuracy and reliability, make welding machine possess the function of " a tractor serves several purposes " simultaneously.
Summary of the invention
The object of the invention is to overcome shortcoming of the prior art with not enough, a kind of multifunctional digital ripple control arc welding inverter is provided.This inverter makes welding machine possess excellent uniformity, reliability and dynamic response capability, Precise control technology based on electric arc transient energy, optimize and utilize welding arc energy, improve the thermal efficiency, guarantee good arc stability, realize multiple current pulse shape output and control, adapt to different metal material welding, to obtain the weld seam welding quality of high-quality.
In order to achieve the above object, the present invention is achieved by following technical proposals: a kind of multifunctional digital ripple control arc welding inverter, is characterized in that: comprise main circuit, control circuit and wire-feed motor module; Described main circuit comprises three-phase common mode filtering module, rectification filtering module, high frequency full-bridge inverting module, power transformer module and the secondary rectification filtering module connecting successively; Described control circuit comprises ARM control system module, and the digitlization panel module, high-frequency inversion driver module and the wire-feed motor driver module that are connected with ARM control system module;
Wherein, the three-phase common mode filtering module of described main circuit is connected with three-phase alternating current input power; The output one of secondary rectification filtering module is connected with the input of wire-feed motor module, and output two is connected with the input one of weld load; The output of wire-feed motor module is connected with the input of weld load two; Wire-feed motor module is also connected with wire-feed motor driver module signal; Described electric current and voltage detection module is for detecting in real time main circuit electric current and voltage value; Described high frequency full-bridge inverting module is connected with the high-frequency inversion driver module of control circuit, to realize the output characteristics of being controlled inverter by control circuit.
Inverter of the present invention has excellent uniformity, dynamic response performance and autgmentability; Precise control technology based on electric arc transient energy, optimizes and utilizes welding arc energy, improves the thermal efficiency, guarantee good arc stability, realize multiple current pulse shape output and control, adapt to different metal material welding, to obtain the weld seam welding quality of high-quality.Simultaneously by adopting digitlization panel module that inverter output characteristics parameter is set, realized full-digital control, realized multiple welding current waveform and regulated, made inverter of the present invention be adapted to the welding of various metals material, save and produce input cost, enhance productivity.
Described control circuit also comprises overcurrent protection detection module and over-and under-voltage open phase detection module; Described overcurrent protection detection module is connected with ARM control system module, high-frequency inversion driver module and high frequency full-bridge inverting module respectively; Described over-and under-voltage open phase detection module is connected with three-phase common mode filtering module with ARM control system module respectively.
Described control circuit also comprises the temperature detecting module for Real-Time Monitoring high frequency full-bridge inverting module temperature; Described temperature detecting module is connected with ARM control system module.
Preferred scheme is: described ARM control system module adopts the ARM chip that model is STM32F405RGT6; In described ARM chip, be solidified with the multifunctional digital ripple control software systems that run on FreeRTOS embedded real-time operating system.It is core that inverter of the present invention be take the ARM chip that model is STM32F405RGT6, and the ARM chip that model is STM32F405RGT6 is ARM Cortex
tM32 RISC embedded microprocessors of-M4 framework, are transplanted to FreeRTOS embedded real-time operating system in the control of welding machine, make welding machine possess excellent uniformity, reliability and dynamic response capability.
The ADC port of described ARM chip is directly connected with electric current and voltage detection module; The GPIO port of ARM chip is directly connected with temperature detecting module with overcurrent protection detection module, over-and under-voltage open phase detection module respectively; The PWM port of ARM chip is connected with wire-feed motor driver module with high-frequency inversion driver module respectively; The CAN port of ARM chip is directly connected with digitlization panel module.
Principle of the present invention is: main circuit adopts full-bridge inverting formula topological structure, adopts the striking mode of high unloaded slow wire feed.The modulation of full-bridge inverting pulsewidth is by carry out real-time task scheduling in FreeRTOS embedded real-time operating system, by pid control algorithm, realize the comparison operation of given signal and feedback signal, PID controller computing Output rusults is exported to digitized pwm signal by the TIMER module of ARM control system module, by high-frequency inversion driver module, isolate amplification, the power switch pipe IGBT that controls high frequency full-bridge inverting module according to certain sequential conducting with close, realize high frequency alternating current-direct current and change.Current feedback is with electric current and voltage detection module, to detect electric current and voltage output valve at inverter output, obtain sampled signal, through amplifying, comparing, be transported to again ARM control system module, change conducting and the deadline of power tube IGBT in high frequency full-bridge inverting module, realize the adjusting of dutycycle to reach the object of power adjusting, make the instantaneous output energy reserving of inverter stable, reach the object of welding process Precise control.
Compared with prior art, tool of the present invention has the following advantages and beneficial effect:
1, inverter of the present invention carries out real-time Precise control to the transient energy of welding arc, single order step response realizes non-overshoot and controls, arc energy in whole welding process is obtained accurately and Flexible Control, guarantee good arc stability and deflection, be easier to obtain the welding quality of high-quality;
2, inverter of the present invention has been realized full-digital control, has excellent uniformity, dynamic response performance and autgmentability;
3, inverter of the present invention has been realized multiple welding current waveform and has been regulated control, for different welding wires, by expert database, recalls corresponding welding waveform, to adapt to various weld metal materials, realize multiple welding method, a tractor serves several purposes, save and produce input cost, enhance productivity.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of inverter of the present invention;
Fig. 2 is the circuit theory diagrams of the main circuit of inverter of the present invention;
Fig. 3 (a) and Fig. 3 (b) are the circuit theory diagrams of the control circuit medium-high frequency inversion driver module of inverter of the present invention;
Fig. 4 is the schematic block circuit diagram of overcurrent protection detection module in the control circuit of inverter of the present invention;
Fig. 5 is the concrete connection layout of ARM control system module in the control circuit of inverter of the present invention;
Fig. 6 is the circuit theory diagrams of wire-feed motor driver module in the control circuit of inverter of the present invention;
Fig. 7 is the circuit theory diagrams of electric current and voltage detection module in the control circuit of inverter of the present invention;
Fig. 8 is the circuit theory diagrams of temperature detecting module in the control circuit of inverter of the present invention;
Fig. 9 (a) and Fig. 9 (b) are the circuit theory diagrams of over-and under-voltage open phase detection module in the control circuit of inverter of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment, the present invention is described in further detail.
Embodiment
A multifunctional digital ripple control arc welding inverter, its structured flowchart as shown in Figure 1, comprises main circuit, control circuit and wire-feed motor module 106; Main circuit comprises successively the three-phase common mode filtering module 101 connecting, rectification filtering module 102, high frequency full-bridge inverting module 103, power transformer module 104 and a secondary rectification filtering module 105; Control circuit comprises ARM control system module 108, and the digitlization panel module 114, high-frequency inversion driver module 107, electric current and voltage detection module 110 and the wire-feed motor driver module 109 that are connected with ARM control system module 108; High-frequency inversion driver module 107 is connected with high frequency full-bridge inverting module 103.Wherein three-phase common mode filtering module 101 is connected with three-phase alternating current input power, and the output one of secondary rectification filtering module 105 is connected with the input of wire-feed motor module 106, output two with weld load input one be connected; The output of wire-feed motor module 106 is connected with the input of weld load two.Electric current and voltage detection module 110, for detecting in real time main circuit electric current and voltage value, sends the electric current and voltage result that detects gained to ARM control system module 108, realizes the monitoring to main circuit electric current and voltage.High frequency full-bridge inverting module 103 is connected with the high-frequency inversion driver module 107 of control circuit, to realize by control circuit, controls inverter output characteristics.
Inverter of the present invention has excellent uniformity, dynamic response performance and autgmentability; The transient energy of welding arc is carried out to real-time Precise control, single order step response realizes non-overshoot and controls, arc energy in whole welding process is obtained accurately and Flexible Control, guarantee good arc stability and deflection, be easier to obtain the welding quality of high-quality.
Digitlization panel module 114 is visual human-computer interaction interfaces, and user can arrange inverter output characteristics parameter by digitlization panel module 114; The inverter output characteristics parameter that ARM control system module 108 arranges according to user, controls high frequency full-bridge inverting module 103 thereby export corresponding signal driver high-frequency inversion driver module 107, makes inverter export multiple welding waveform.Inverter of the present invention has been realized multiple welding current waveform and has been regulated control, for different welding wires, by expert database, recalls corresponding welding waveform, to adapt to the welding of various metals material, realize multiple welding method, a tractor serves several purposes, save and produce input cost, enhance productivity.When consumable electrode welds, 106 operations of wire-feed motor module, control welding wire transporting velocity; When non-melt pole welds, wire-feed motor module 106 is out of service.
Electric current and voltage detection module 110 is also connected with digitlization panel module 114.The electric current and voltage output valve that electric current and voltage detection module 110 detects gained can be inquired about on digitlization panel module 114.
Control circuit also comprises overcurrent protection detection module 111 and over-and under-voltage open phase detection module 112; Overcurrent protection detection module 111 is connected with ARM control system module 108, high-frequency inversion driver module 107 and high frequency full-bridge inverting module 103 respectively; Over-and under-voltage open phase detection module 112 is connected with three-phase common mode filtering module 101 with ARM control system module 108 respectively.
High frequency full-bridge inverting module 103 comprises two inverter bridge, and each inverter bridge has comprised two IGBT unit, and the input of IGBT unit is connected with the output end signal of control circuit.The present invention adopts high-frequency I GBT inversion transformation technique, further improved electric energy conversion efficiency, save manufactured materials, reduced the volume of inverter, improved the adaptability of on-the-spot application.
Control circuit also comprises the temperature detecting module 113 for Real-Time Monitoring high frequency full-bridge inverting module temperature; Temperature detecting module 113 is connected with ARM control system module 108.
Preferred scheme is: one time rectification filtering module 102 is provided with soft-start module; Control circuit also comprises Air Valve Control module, and Air Valve Control module is connected with ARM control system module 108 respectively.
ARM control system module adopts the ARM chip that model is STM32F405RGT6; In ARM chip, be solidified with the multifunctional digital ripple control software systems that run on FreeRTOS embedded real-time operating system.It is core that inverter of the present invention be take the ARM chip that model is STM32F405RGT6, and the ARM chip that model is STM32F405RGT6 is ARM Cortex
tM32 RISC embedded microprocessors of-M4 framework, are transplanted to FreeRTOS embedded real-time operating system in the control of welding machine, make welding machine possess excellent uniformity, reliability and dynamic response capability.
The ADC port of ARM chip is directly connected with electric current and voltage detection module; The GPIO port of ARM chip is directly connected with temperature detecting module with overcurrent protection detection module, over-and under-voltage open phase detection module respectively; The PWM port of ARM chip is connected with wire-feed motor driver module with high-frequency inversion driver module respectively; The CAN port of ARM chip is directly connected with digitlization panel module.
More particularly, the circuit theory diagrams of main circuit as shown in Figure 2.Three-phase alternating current input power connects three-phase common mode filtering module 101; Connect the rectifier bridge BR1 in a rectification filtering module 102, then connect filtering link L1, capacitor C 7, capacitor C 8, capacitor C 9 and capacitor C 12; Connect again inverter bridge TR1 in high frequency full-bridge inverting module 103 and inverter bridge TR2, capacitor C 2, capacitor C 3, capacitor C 13, capacitor C 14, resistance R 2, resistance R 3, resistance R 5, resistance R 6.The high-frequency power transformer T1 of the output connection power transformer module 104 of high frequency full-bridge inverting module 103 is elementary, and transformer T1's is secondary by exporting direct current after high frequency full-wave rectifying circuit, filtering link L2.
High-frequency inversion driver module 107 circuit theory diagrams, as shown in Fig. 3 (a) and Fig. 3 (b), mainly play the effect of signal isolation and power amplification.The two-way pwm signal PWM1 and the PWM2 that by ARM control system module, are produced, through amplifying circuit, the level signal of 3.3V is modulated into 15V, pwm signal after two-way modulation is as 2 of connector P3, the input signal of 3 pin, the full bridge inverter that driving is comprised of M1～M4, produce AC signal, through high frequency transformer T2, high frequency transformer T3 isolation produces 4 road IGBT and drives signal, connector P2, the driving signal of the connector P4 corresponding inverter bridge TR1 of difference and inverter bridge TR2, connector P2 wherein, 1 of connector P4, 2 pin and 5, the G utmost point of IGBT unit in the corresponding inverter bridge of 4 pin, the E utmost point drives signal.Connector P1 input 22V alternating current, through the power supply signal of rectification module U1, lowering and stabilizing blood pressure chip LM2576 generation 15V, is the power supply of high-frequency inversion driver module.
Fig. 4 is the circuit theory diagrams of overcurrent protection detection module 111, and its principle is to utilize current transformer to detect in real time the electric current on the former limit of main transformer, once find that electric current surpasses setting value, immediately output protection signal.Connector P5 connects current transformer, current transformer is coupled the alternating current of main circuit according to a certain percentage, recycling rectifying tube D19～D22, capacitor C 29 is carried out rectifying and wave-filtering, and by resistance R 39, current signal is converted to 2 pin that voltage signal is input to comparator LM393, by chip MC7805, produce the reference voltage of 5V, adjustable resistance R44 sets the input voltage of 3 pin of comparator LM393, regulate adjustable resistance R44 can realize the maximum operating currenbt that overcurrent protection is set, if it is large that the current ratio detecting is set lowest high-current value, the voltage of voltage ratio 3 pin of 2 pin that is LM393 is high, the 4 pin output low levels of comparator LM393, optocoupler U3 conducting, and realize signal auto-lock function by optocoupler U5, through the outside output protection signal of chip HCPL-3120, flow on the one hand ARM control system module 108, the PWM that simultaneously controls high-frequency inversion driver module 107 drives signal output, realize quick protection in advance.
The concrete connection layout of ARM control system module 108 as shown in Figure 5.ARM control system module 108 adopts the ARM chip that model is STM32F405RGT6, and this ARM chip is ARM Cortex
tM32 RISC embedded microprocessors of-M4 framework.The multifunctional digital ripple control software systems of having solidified the embedding of FreeRTOS embedded real-time operating system in ARM chip run on this real-time operation platform, it can be according to the detection current/voltage value of electric current and voltage detection module 110 and the comparative result of given parameters, on FreeRTOS embedded real-time operating system, complete data operation and processing, pass through again the PWM port output pwm signal of ARM control system module 108, by high-frequency inversion driver module 107 isolation with after amplifying, go to control the turn-on and turn-off of the power switch pipe of high frequency full-bridge inverting module 103, obtain power supply-Arc System and stablize required constant voltage, constant current, suddenly fall, while rising even, become external characteristics output, to meet the demand of multiple welding material and welding technique.
ARM control system module 108 mainly realizes the output characteristics control of inverter, the SECO of welding process, the control of wire feeding motor speed and external fault detect and interactive function.External fault detects as under-voltage, overvoltage, phase shortage, overcurrent, the fault-signal such as overheated interrupt by triggering the GPIO mouth of ARM control system module 108, enters corresponding interruption and processes function and process.Pulse frequency during pulse welding, Current rise fall time, welding base value, intermediate value and peak point current, the welding parameter such as supply gas of supplying gas in advance, lag behind have all been controlled in real time by ARM control system module 108.Corresponding welding parameter is to arrange by digitlization panel module 114, and the welding parameter setting is communicated to setting by CAN and ARM control system module 108.
Wire-feed motor driver module 109 circuit theory diagrams as shown in Figure 6.The driving of wire feeding motor realizes forward, the reversion of wire feeding motor and suddenly stops action by half-bridge driven chip I R2110 driven MOS FET half-bridge drive circuit and by solid-state relay K1.By ARM control system module 108, produce two-way pwm signal PWM3 and PWM4, receive respectively PWMH and PWML.Wire feeding motor is connected with connector P7, when 1 pin of relay K 1 is connected with 2 pin, PWMH is high level, when PWML is low level, by bootstrap capacitor C36, bootstrap capacitor C37 effect, now FET Q1 conducting, and FET Q2 closes, now the positive and negative shorted on both ends of wire feeding motor is to 24V, and motor is in the anxious state that stops; PWMH is low level, when PWML is high level, and FET Q2 conducting and FET Q1 closes, now motor both end voltage is+24V, motor forward.When 1 pin of relay K 1 is connected with 3 pin, PWMH is high level, when PWML is low level, and FET Q1 conducting, FET Q2 turn-offs, and motor both end voltage is-24V, now motor reversal; When PWMH is low level, when PWML is high level, FET Q1 turn-offs, and FET Q2 is open-minded, and now the positive and negative shorted on both ends of motor is to ground, and motor is in the anxious state that stops.By regulating the dutycycle of PWMH and PWML, be the rotating speed of adjustable wire feeding motor.
Electric current and voltage detection module 110 circuit theory diagrams as shown in Figure 7.The detection of electric current realizes by Hall current sensor, measure the electric current of main circuit output, current signal is converted to voltage, Hall current sensor is connected with connector P8, through resistance R 54, capacitor C 45, resistance R 56, resistance R 55, capacitor C 66 capacitance-resistance filters, be input to 3 pin of amplifier LF353, amplifier LF353 is connected into the pattern of voltage follower, improve input impedance, strengthen rear class driving force, process resistance R 58 and resistance R 60 dividing potential drops convert the voltage of 0 required～3.3V of ARM control system module 108 pins to again, diode D30 and diode D31 are ARM control system module 108 pin protection diodes, when preventing too high (surpassing 3.3V) of input voltage or too low (negative pressure), damage ARM control system module 108 pins, the detection of voltage and current capacity seemingly, are just directly measured the output voltage of main circuit by the mode of electric resistance partial pressure, then, by the similar signal processing of voltage signal process after this dividing potential drop, change the required voltage range of ARM control system module 108 pins into.
Temperature detecting module 113 circuit theory diagrams as shown in Figure 8, its principle is by temperature detect switch (TDS) being arranged on the radiator of IGBT unit of high frequency full-bridge inverting module, the temperature of Real-Time Monitoring IGBT unit, temperature detect switch (TDS) is connected with connector P9, when temperature surpasses the temperature of setting, temperature detect switch (TDS) is closed, optocoupler U11 conducting, voltage on holding wire Temperature is pulled down to 0V from 3.3V, holding wire Temperature is connected with the IO mouth of ARM control system module 108, trigger low level interrupt signal, complete and interrupt processing and showing.
Over-and under-voltage open phase detection module 112 circuit theory diagrams are as shown in Fig. 9 (a) and Fig. 9 (b); over-and under-voltage detects principle: three-phase alternating current input power is through transformer step-down; be rectified into direct current signal VIN; regulating resistance R66, resistance R 70; the size of resistance R 69 and resistance R 71; electrical network under-voltage, superpotential threshold voltage be can change, electrical network under-voltage, overvoltage protection effect can be played.When having under-voltage fault-signal, hysteresis loop comparator output low level, holding wire Under-Voltage output low level, connects the IO mouth pin triggering low level interruption of ARM control system module 108.When having overvoltage fault-signal, hysteresis loop comparator output low level, holding wire Over-Voltage output low level, connects the IO mouth pin triggering low level interruption of ARM control system module 108.Phase shortage detects principle: wherein two phase signals of three-phase alternating current input power are connected with connector P10, have at least two-phase signal circuit just can work, so only need detect two phase signals of three-phase alternating current input power, under normal circumstances, optocoupler U13 conducting, comparator U14 exports high level, during phase shortage, optocoupler U13 cut-off, comparator U14 output low level, trigger ARM control system module 108 low levels and interrupt, complete and interrupt processing and showing.
Above-described embodiment has following characteristics:
1, total digitalization: this example is first with ARM Cortex
tM32 RISC embedded microprocessors of-M4 framework are core, the Digital Control platform that the FreeRTOS embedded real-time operating system of take is Arc Welding Power, make full use of the superior function of ARM control system module aspect embedded Control, adopt modularization, portable method for designing, by software programming, realizing inverter output characteristics controls, welding SECO, peripheral monitoring and human-computer dialogue and wire-feed motor are controlled function, pwm signal is directly exported by programming mode by ARM control system module, finally realize Arc Welding Power Digital Control, make welding machine there is better uniformity, dynamic response performance and autgmentability,
2, become more meticulous: the present embodiment makes full use of ARM Cortex
tMthe excellent operational performance of 32 RISC embedded microprocessors of-M4 framework, functional integration and real-time, by the FPU FPU Float Point Unit of integrated chip, the transient energy of welding arc (welding current and weldingvoltage) is carried out to Real-time Collection, calculate, analyze, reasoning and comprehensive intelligent judgement, various conditions at the arc during according to different welding position are controlled the output characteristics of inverter in real time automatically, to reach the object to welding arc transient energy optimization output and adjusting, follow the tracks of the setting that conditions at the arc respond electric arc variation and welding current fast, the control that makes welding process more accurately and flexibility, even if guarantee that electric arc still can smooth combustion in low current situation, to obtain the welding quality of high-quality,
3, high efficiency: the present embodiment adopts high-frequency I GBT inversion transformation technique, improves energy conversion efficiency, saves manufactured materials, reduces welding machine volume and weight, has saved manufacturing cost; Combine with circuit such as protections with overcurrent, overvoltage, under-voltage, overheated detection, further improved the safety and reliability of welding machine;
4, flexibility: the present embodiment can be realized multiple pulse parameter flexible combination ability, can produce normal pulsed welding waveform, front intermediate value pulse welding waveform, rear intermediate value pulse welding waveform, can meet multiple welding method (comprising manual welding, argon arc welding, the gas metal-arc welding) demand that welding parameters regulates when different phase, different materials;
5, high reliability: the present embodiment has adopted the measure of two-stage protection in advance, the electric current by the overcurrent protection detection module detection former limit of main transformer carries out quick overcurrent protection on the one hand; On the other hand, also by over-and under-voltage open phase detection module and temperature detecting module, overvoltage, under-voltage, phase shortage, the fault such as overheated are detected and processed, realize second protection; By these measures, improved greatly the reliability of inverter.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (5)
1. a multifunctional digital ripple control arc welding inverter, is characterized in that: comprise main circuit, control circuit and wire-feed motor module; Described main circuit comprises three-phase common mode filtering module, rectification filtering module, high frequency full-bridge inverting module, power transformer module and the secondary rectification filtering module connecting successively; Described control circuit comprises ARM control system module, and the digitlization panel module, high-frequency inversion driver module, electric current and voltage detection module and the wire-feed motor driver module that are connected with ARM control system module;
Wherein, the three-phase common mode filtering module of described main circuit is connected with three-phase alternating current input power; The output one of secondary rectification filtering module is connected with the input of wire-feed motor module, and output two is connected with the input one of weld load; The output of wire-feed motor module is connected with the input of weld load two; Wire-feed motor module is also connected with wire-feed motor driver module signal; Described electric current and voltage detection module is for detecting in real time main circuit electric current and voltage value; Described high frequency full-bridge inverting module is connected with the high-frequency inversion driver module of control circuit, to realize the output characteristics of being controlled inverter by control circuit.
2. multifunctional digital ripple control arc welding inverter according to claim 1, is characterized in that: described control circuit also comprises overcurrent protection detection module and over-and under-voltage open phase detection module; Described overcurrent protection detection module is connected with ARM control system module, high-frequency inversion driver module and high frequency full-bridge inverting module respectively; Described over-and under-voltage open phase detection module is connected with three-phase common mode filtering module with ARM control system module respectively.
3. multifunctional digital ripple control arc welding inverter according to claim 2, is characterized in that: described control circuit also comprises the temperature detecting module for Real-Time Monitoring high frequency full-bridge inverting module temperature; Described temperature detecting module is connected with ARM control system module.
4. multifunctional digital ripple control arc welding inverter according to claim 3, is characterized in that: described ARM control system module adopts the ARM chip that model is STM32F405RGT6; In described ARM chip, be solidified with the multifunctional digital ripple control software systems that run on FreeRTOS embedded real-time operating system.
5. multifunctional digital ripple control arc welding inverter according to claim 4, is characterized in that: the ADC port of described ARM chip is directly connected with electric current and voltage detection module; The GPIO port of ARM chip is directly connected with temperature detecting module with overcurrent protection detection module, over-and under-voltage open phase detection module respectively; The PWM port of ARM chip is connected with wire-feed motor driver module with high-frequency inversion driver module respectively; The CAN port of ARM chip is directly connected with digitlization panel module.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107570842A (en) * | 2017-09-08 | 2018-01-12 | 盐城鼎力达焊接科技有限公司 | A kind of welding machine control circuit system |
| CN107900491A (en) * | 2017-12-19 | 2018-04-13 | 宁波欧罗巴焊割科技有限公司 | A kind of welding machine open-phase protection control circuit |
| CN109262116A (en) * | 2017-07-17 | 2019-01-25 | 浙江颐顿机电有限公司 | A kind of Multifunctional digitized welding machine system |
| CN110064822A (en) * | 2019-05-29 | 2019-07-30 | 华南理工大学 | A kind of fast frequency pulse TIG welding welding system |
| CN110216355A (en) * | 2019-07-16 | 2019-09-10 | 上海米勒焊接设备有限公司 | A kind of the multifunctional welding machine control circuit and method of automatic anti-high-frequency and high-voltage breakdown |
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| CN112894079A (en) * | 2021-01-18 | 2021-06-04 | 南通博锐泰焊接科技有限公司 | Digital pulse type direct current manual arc welding method and electric arc welding machine applying same |
| CN114147320A (en) * | 2021-12-30 | 2022-03-08 | 浙江业世焊接科技有限公司 | Welding machine circuit with plasma cutting function |
| CN114211094A (en) * | 2021-12-29 | 2022-03-22 | 浙江业世焊接科技有限公司 | Welding machine control circuit based on PFC circuit |
| CN114226919A (en) * | 2022-01-04 | 2022-03-25 | 浙江业世焊接科技有限公司 | Welding machine control circuit based on single chip microcomputer control |
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| CN107900491B (en) * | 2017-12-19 | 2024-04-26 | 宁波欧罗巴科技有限公司 | Open-phase protection control circuit of welding machine |
| CN110064822B (en) * | 2019-05-29 | 2024-02-20 | 华南理工大学 | Fast-frequency pulse TIG welding system |
| CN110064822A (en) * | 2019-05-29 | 2019-07-30 | 华南理工大学 | A kind of fast frequency pulse TIG welding welding system |
| CN110216355A (en) * | 2019-07-16 | 2019-09-10 | 上海米勒焊接设备有限公司 | A kind of the multifunctional welding machine control circuit and method of automatic anti-high-frequency and high-voltage breakdown |
| CN112039349A (en) * | 2020-09-10 | 2020-12-04 | 洛阳博日智能科技有限公司 | Intelligent high-frequency high-voltage modular power supply |
| CN112039349B (en) * | 2020-09-10 | 2024-09-27 | 洛阳博日智能科技有限公司 | Intelligent high-frequency high-voltage modularized power supply |
| CN112894079A (en) * | 2021-01-18 | 2021-06-04 | 南通博锐泰焊接科技有限公司 | Digital pulse type direct current manual arc welding method and electric arc welding machine applying same |
| CN114211094A (en) * | 2021-12-29 | 2022-03-22 | 浙江业世焊接科技有限公司 | Welding machine control circuit based on PFC circuit |
| CN114147320A (en) * | 2021-12-30 | 2022-03-08 | 浙江业世焊接科技有限公司 | Welding machine circuit with plasma cutting function |
| CN114226919A (en) * | 2022-01-04 | 2022-03-25 | 浙江业世焊接科技有限公司 | Welding machine control circuit based on single chip microcomputer control |
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