CN202984876U - Parallel Inverter power supply system for large-power pulse MIG welding based on DSP - Google Patents
Parallel Inverter power supply system for large-power pulse MIG welding based on DSP Download PDFInfo
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- CN202984876U CN202984876U CN 201220235944 CN201220235944U CN202984876U CN 202984876 U CN202984876 U CN 202984876U CN 201220235944 CN201220235944 CN 201220235944 CN 201220235944 U CN201220235944 U CN 201220235944U CN 202984876 U CN202984876 U CN 202984876U
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Abstract
A parallel Inverter power supply system for large-power pulse MIG welding based on DSP relates to high frequency IGBT inversion technology base on DSP and comprises a three-phase AC input electrical network, two sets of parallel main circuits identical in circuit structure, a control circuit, a DSP digital control module, an arc load and a man-machine interface module, wherein the main circuits comprise input rectifying and filtering modules, high frequency inversion modules, power transformation modules and output rectifying and filtering modules, and the control circuit comprises a voltage and current detection module, a fault protection module, a DSP digital control module, a man-machine interface module and a high frequency driving module. Two parallel main circuits are employed in the Inverter power supply system. Advanced high frequency IGBT inversion technology and DSP digital control technology are employed to effectively improve the output power of the pulse MIG welded inverter power supply. The Inverter power supply system is high in output power, production efficiency and reliability, and is especially suitable for rapid and highly effectively welding large and thick plates.
Description
Technical field
The utility model relates to a kind of high-frequency I GBT inversion transformation technique based on DSP, particularly a kind of parallel great power pulse MIC welding inverter system based on DSP.
Background technology
The development experience of Arc Welding Power the stages such as arc generator, alternating current arc welding transformer, silicon arc welding rectifier and arc welding inverter.Arc welding inverter adopts the high-frequency inversion technology, have that volume is little, lightweight, energy-efficient, control cycle is short, the complete machine dynamic response is fast, can carry out the advantage such as accurately control, the application of inversion transformation technique has realized the digitlization of electric power main circuit, make the performance of Arc Welding Power that revolutionary progress occur, but because prior art has been inherited many traditional analog control modes, make the advantage of arc welding inverter fail to be fully played.In recent years, along with developing rapidly of Digital Signal Processing, the demand of digital Control Technology grows with each passing day, and the application in engineering field, industrial production, military affairs, medical science and scientific research is more prevalent, at welding field, in order to satisfy the demand of domestic and international market, the digitized arc welding power supply control system is arisen at the historic moment, and particularly the digital Control Technology of arc welding inverter, make original inverter more reliable, performance is better, and function is more complete.The digital Control Technology of arc welding inverter mainly contains two purposes: the one, and use digitizing technique to solve rapidly the arc welding inverter self problem; The 2nd, with the function of digitizing technique lifting arc welding inverter, satisfy the demand of advanced manufacturing technology.
The efficient high-speed welding is welded the production efficiency successful to improving, and will realize the welding of large slab efficient high-speed, and key is the further raising of welding current, such as adopting the high power welding Processes and apparatus.At present; at pulse welding (Metal Inert Gas Shieled Welding; be called for short the MIG weldering) field; because being subject to the restriction of semiconductor power device capacity and the restriction of high frequency transformer magnetic material; power output is little, and single inversion unit module power output often can not satisfy the requirement of high power load, and traditional Pulse MIG Welding Power Source is mainly take the following pulse MIC welding of conventional 630A as main both at home and abroad; although comparative maturity technically, power output is little.In order to fill up the bevel for welding of large slab, just traditional pulse MIC welding often needs multiple tracks, layer to achieve the goal, to be difficult to realize the one-shot forming welding, therefore production efficiency is low both at home and abroad.
This shows that existing Pulse MIG Welding Power Source technology mainly contains the shortcoming of the following aspects:
(1) power output is little.
(2) for large slab, be difficult to the disposable efficient high-speed welding that realizes moulding.
(3) production efficiency is low.
For example the patent No. is 200810203848.9 the digital pulse welding power control method based on DSP, although adopted the DSP digital Control Technology, owing to being subject to the little restriction of single inversion unit module power output, thereby has defects.
" based on the development of the pulse MIC welding digitalization welding machine of DSP " (Lu Xiaoming in the prior art documents and materials for another example, Xiong Jingqing, Li Jin, Deng. electric welding machine, 2009.02) formed by single full-bridge inverting unit module and DSP Digitizing And Control Unit, although this pulse MIC welding system can realize the controllability of droplet transfer, its power output little (peak point current 250A), can not realize the efficient high-speed welding, therefore also there is defects.
The utility model content
The purpose of this utility model is to overcome the shortcoming of prior art with not enough, a kind of parallel great power pulse MIC welding inverter system based on DSP is provided, native system has adopted the parallel great power main circuit, and whole system is carried out software programming control, power output is large, production efficiency is high, is easy to realize the one-shot forming welding, and reliability is high.
the purpose of this utility model is achieved through the following technical solutions: a kind of parallel great power pulse MIC welding inverter system based on DSP, comprise three-phase alternating current input electrical network, main circuit, arc load, human-computer interface module and control circuit, described control circuit comprises digital signal processor (Digital Signal Processor, be called for short DSP) the Digital Control module, described control circuit comprises first control circuit and second control circuit, first control circuit is connected with second control circuit by DSP Digital Control module, described main circuit comprises the first main circuit and the second main circuit, the first main circuit and the second main circuit are parallel with one another.
Described the first main circuit is identical with the circuit structure of the second main circuit, the input rectifying filtration module, high-frequency inversion module, power voltage changing module and the output rectification filter module that all comprise electrical connection successively, described input rectifying filtration module is connected with three-phase alternating current input electrical network, and described output rectification filter module is connected with arc load.
The circuit structure of described first control circuit and second control circuit is identical; all comprise error protection module, high-frequency drive module, electric current and voltage detection module that an end all is connected with DSP Digital Control module; the other end of described error protection module is connected with three-phase alternating current input electrical network; the other end of described high-frequency drive module is connected with the high-frequency inversion module, and the other end of described electric current and voltage detection module is connected with arc load.
Described DSP Digital Control module is comprised of a digital signal processor, by the Parallel Control of a digital signal processor realization to the first main circuit and the second main circuit.
Described DSP Digital Control module is connected with human-computer interface module, and controls human-computer interface module; Described digital signal processor adopts the TMS320LF2407A chip, regulates the peak value of pulse base value stage electric current of main circuit and switches output.
The embedded task manager of described digital signal processor, described task manager has pwm unit, described pwm unit produces respectively the pulse-width signal of two groups of two-way complementations with full software mode, be respectively used to the pulse width modulation (Pulse Width Modulation is called for short PWM) of the first main circuit and the second main circuit.
Described error protection module comprises interconnective over-voltage detection circuit, undervoltage detection circuit, over-current detection circuit, excess temperature testing circuit and AND circuit.
Described high-frequency inversion module comprises converter bridge switching parts pipe group, and described converter bridge switching parts pipe group comprises VT1, VT2, VT3 and VT4.
Described high-frequency drive module comprises the TLP250 opto-coupler chip, and described TLP250 opto-coupler chip has 4; Described high-frequency drive module is strengthened rear input high-frequency inversion module with the pwm signal of DSP Digital Control module output, as the switching signal of converter bridge switching parts pipe group.
operation principle of the present utility model: the utility model is formed in parallel by the two identical main circuits of cover circuit structure, DSP control module regulation output current/voltage and the demonstration of controlling welding parameter, rectification is to enter the high-frequency inversion module after the smooth direct current electricity to the three-phase main-frequency alternating current through the input rectifying filtration module, then flows into arc load by power voltage changing module, output rectification filter module, meanwhile, DSP Digital Control module detects the voltage of arc load according to the electric current and voltage detection module, current signal, the signal that detects and the given relevant parameter of human-computer interface module are compared, after FUZZY ALGORITHMS FOR CONTROL computing through DSP Digital Control module, issue signal of pwm unit of the embedded task manager of DSP Digital Control module, so pwm unit produces the pwm signal of two groups of two-way complementations, these two groups of two-way complementary PWM signals remove to control high-frequency inversion insulation module grid bipolar transistor (Insulated Gate Bipolar Transistor by two high-frequency drive modules amplifications, abbreviation IGBT) switching tube turns on and off, thereby obtain the 20kHz high-frequency high-voltage, this high-frequency high-voltage converts through the overpower voltage changing module low-voltage and high-current output that meets welding process requirement to again, receive level and smooth welding current through the output rectification filter module again, namely feed back the fuzzy closed loop control procedure, overvoltage, under-voltage, overcurrent and thermal-shutdown circuit detect three-phase main-frequency voltage, primary current and radiator temperature, give the error protection module voltage that detects, electric current and temperature signal, as the phenomenon of overvoltage, under-voltage, overcurrent and excess temperature appears, the error protection module will be given low level fault guard signal of DSP, DSP produces low level PWM by the switching tube of high-frequency drive module shuts down high-frequency inversion module, with the protection main circuit, guarantee its trouble free service.
The utility model has following advantage and effect with respect to prior art:
(1) power output is large.The utility model adopts the parallel great power full-bridge converter to obtain powerful output, thereby makes power density large, and power output is large.
(2) speed of welding is fast, and production efficiency is high.Often need multiple tracks, layer weld seam just can fill up large thick plates groove and compare with traditional pulse MIC welding, of the present utility model because its power output is large, can greatly improve speed of welding and deposition efficiency, thereby improve the welding production efficiency of pulse MIC welding.
(3) for the welding of large slab, realized the one-shot forming welding.Because the molten drop amount that adopts thick welding wire to produce under large electrical current heat effect is large, the molten bath is wide and dark, can fill up very soon the groove of large slab weldment, large power electric arc burns on the molten bath, total heat input has realized the efficient high-speed welding to the disposal molding of large slab much larger than the heat input of traditional pulse MIC welding.
(4) welding quality is high.Welding procedure can realize pulse multi-parameters optimization coupling, and welding quality is high.
(5) system stability, control accuracy is high, and reliability is high.This system is take a digital signal processor as core, realized the Parallel Control of two main circuits, and by software programming, make that system can stablize, reliable high-power output, in addition, the utility model has also adopted the digital Control Technology of feedback of voltage and current, and the dynamic characteristic of system is good, control accuracy is high.
Description of drawings
Fig. 1 is overall structure block diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of the first main circuit of the present utility model.
Fig. 3 is the circuit theory diagrams of high-frequency drive module of the present utility model.
Fig. 4 a is voltage sampling circuit schematic diagram of the present utility model.
Fig. 4 b is current sampling circuit schematic diagram of the present utility model.
Fig. 5 is error protection modular circuit schematic diagram of the present utility model.
Fig. 6 is the structured flowchart of DSP Digital Control module of the present utility model.
Fig. 7 a1 is power supply change-over circuit schematic diagram of the present utility model.
Fig. 7 a2 is jtag interface circuit theory diagrams of the present utility model.
Fig. 7 a3 be of the present utility model on the row of drawing organize circuit theory diagrams.
Fig. 7 a4 is DSP control circuit schematic diagram of the present utility model.
Fig. 7 a5 is memory circuit schematic diagram of the present utility model.
Fig. 7 a6 is program of the present utility model/data space chip select circuit schematic diagram.
Fig. 7 a7 is A/D sampling filter circuit theory diagrams of the present utility model.
Fig. 7 a8 is PWM output interface circuit schematic diagram of the present utility model.
Fig. 7 b1 is RS232 bus driving circuits schematic diagram of the present utility model.
Fig. 7 b2 is LCD user-machine interface circuit theory diagrams of the present utility model.
Fig. 7 b3 is CAN bus driving circuits schematic diagram of the present utility model.
Fig. 8 is the software control flow chart of DSP Digital Control module of the present utility model.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, a kind of parallel great power pulse MIC welding inverter system based on DSP, comprise three-phase alternating current input electrical network, two covers main circuit, arc load, human-computer interface module 108 and two cover control circuits parallel with one another, described control circuit comprises DSP Digital Control module 107, first control circuit and second control circuit; The circuit structure of first control circuit and second control circuit is identical, all comprise error protection module 106, high-frequency drive module 109, electric current and voltage detection module 105 that an end all is connected with DSP Digital Control module 107, the other end of described error protection module 106 is connected with three-phase alternating current input electrical network, the other end of described high-frequency drive module 109 is connected with high-frequency inversion module 102, and the other end of described electric current and voltage detection module 105 is connected with arc load; Described DSP Digital Control module also is connected with human-computer interface module 108, and controls human-computer interface module 108; The circuit structure of two cover main circuits is identical, the input rectifying filtration module 101, high-frequency inversion module 102, power voltage changing module 103 and the output rectification filter module 104 that all comprise electrical connection successively, described input rectifying filtration module 101 is connected with three-phase alternating current input electrical network, and described output rectification filter module 104 is connected with arc load.DSP Digital Control module 107 is comprised of a digital signal processor, and described digital signal processor adopts the TMS320LF2407A chip, regulates the peak value of pulse base value stage electric current of main circuit and switches output.Error protection module 106 detects the three-phase alternating current input voltage, is voltage check device; Detect the excess temperature signal, be temperature relay; The detection of primary over-current signal is Hall current sensor; Described human-computer interface module 108 adopts LCD display, the set-point of crest voltage, base value voltage, peak point current and the background current of demonstration pulse MIC welding and the set-point of value of feedback and pulse frequency, pulse duty factor and wire feed rate; Described electric current and voltage detection module 105 is voltage-current sensor, is connected with arc load.
As shown in Figure 2, three-phase alternating current input electrical network meets the rectification module RA1 of input rectifying filtration module 101, then connect filtering link L1, C1 and C2, connect again the inverter bridge VT1 of high-frequency inversion module 102～VT4, C3～C6, R1～R4, export the high-frequency power transformer T1 that connects power voltage changing module 103 elementary, output high power DC pulse after the high frequency full-wave rectifying circuit VD1 of T1 level serial connection output rectification filter module 104 of transformer～VD2 Schottky diode, filtering link L2, above link consists of high-power main circuit.High-frequency inversion module 102 comprises two semi-bridge inversion brachium pontis, and each brachium pontis comprises two IGBT switching devices.
As shown in Figure 3, the high-frequency drive module plays the effect of isolation and power amplification, the PWM that exports due to DSP is the square-wave signal of 3.3V, can not satisfy the power requirement that drives IGBT, and can't realize isolation between control system and main power circuit, therefore the utility model adopts the TLP250 high-speed photoelectric coupler of Japanese Toshiba to form drive circuit, can realize switching fast and strengthening driving power to driving pulse PWM1 and the PWM2 that DSP sends over.The PWM output of DSP Digital Control module 107 is connected with 42 pins that drive link TLP250 respectively, and the output of driving link extremely is connected with G, the E of 4 switching tubes of inverter bridge respectively.two groups of two-way complementary PWM signals PWM1 that DSP Digital Control module 107 produces and PWM2 are respectively as U2 in figure, U4 and U3, the input signal of U5 optocoupler TLP250, TP1～TP2, TP3～TP4, TP5～TP6, the output signal of four pairs of test points such as TP7～TP8 is respectively as the driving signal of 4 IGBT of the VT1～VT4 in high-frequency inversion module 102, like this, the pwm signal of being exported to the 3.3V of TLP250 by DSP Digital Control module 107 does not need level conversion, only need just can directly drive IGBT in high-frequency inversion module 102 by high-frequency drive module 109, when the pwm signal of DSP Digital Control module 107 output was high level signal, by high-frequency drive module 109, the G of IGBT, E interpolar obtained the driving signal of one+15V and conducting, when the pwm signal of DSP Digital Control module 107 outputs was low level signal, by high-frequency drive module 109, the G of IGBT, E interpolar obtained the driving signal of one-7V and turn-off.So just can satisfy well the requirement of quick IGBT switching power tube.B1～B4 is rectifier bridge, U6～U9 is three end integrated regulated power supplies.
as shown in Figs. 4a and 4b, the circuit theory diagrams of electric current and voltage detection module of the present utility model, voltage sampling signal is through inductance L 1, L2 and capacitor C 47, after C48 filtering, adopt non-isolation resistance R47, the sampling of R48 dividing potential drop, carry out signal condition through operational amplifier U16B afterwards, pass through again precision photoelectric coupler chip U18, voltage follower U17B isolates, adjust, become the voltage signal linear with output voltage, the two-way dc pulse voltage signal that is less than or equal to 3.3V that obtains is input to respectively ADCIN0 and the ADCIN1 mouth of DSP Digital Control module 107, realize voltage A/D conversion by corresponding software again.Current sampling circuit utilizes Hall current sensor respectively the output current of two main circuits to be carried out the current signal sampling, Hall current sensor obtains obtaining comparatively clean, level and smooth signal with the linear weak voltage signals of output current through after filtering, then respectively the two-way current feedback signal is input to ADCIN2 and the ADCIN3 mouth of DSP Digital Control module 107, then realizes electric current A/D conversion by corresponding software.The parallel system voltage and current feedback closed-loop control circuit that above-mentioned link consists of just can be realized the control of the constant current mode of parellel inversion power system.
As shown in Figure 5; overvoltage and under-voltage protection testing circuit are inputted electrical network after the Industrial Frequency Transformer step-down with three-phase alternating current; supply with resistor voltage divider circuit after being rectified into d. c. voltage signal with bridge rectifier; regulate respectively the size of bridge circuit resistance R 39, R26 and R38, R24; just can change electrical network overvoltage and under-voltage threshold values, can play overvoltage and under-voltage protection effect.The overheat protector testing circuit is realized overheat protector by the disconnection that detects the temperature relay on radiator, obtain the 1. 2. inverting input of cut-off signal input comparator U6A of CN1, U6A device as a comparison carries out voltage ratio, its in-phase end is given reference voltage, when the temperature of radiator during lower than the temperature relay threshold temperature, temperature relay is closed, and comparator U6A inverting input is low level, and comparator U6A exports high level; During higher than the temperature relay threshold temperature, temperature relay disconnects when the temperature of radiator, and comparator U6A inverting input is high level, comparator U6A output low level, and this signal can cause that the error protection of DSP Digital Control module 107 interrupts.Elementary overcurrent protection testing circuit detection of primary current signal is given the inverting input of comparator U6B after filtering; U6B is device as a comparison; its in-phase input end is given reference current; when the primary current that detects during greater than given reference current; comparator U6B output low level, this signal can cause the error protection interruption of DSP Digital Control module 107.Detecting pin PDPINTA with the error protection of DSP Digital Control module 107 with the output of door U13 after optocoupler U14 is connected; when with door U13 output output overvoltage, under-voltage, cross gentle over-current detection signal under-voltage, overvoltage appears, when crossing gentle over current fault; with the door output low level; output low level after the U14 optocoupler; the PDPINTA pin of the triggering signal supplied with digital signal processor that interrupts as the error protection of digital signal processor; enter the error protection interrupt service subroutine, realize error protection.
As described in Figure 6, selected the control chip of TMS320LF2407A as DSP Digital Control module 107, its basic structure comprises pwm signal output module, RS232/485 and CAN2.0B communication module, human-computer interface module LCD interface, memory module RAM and Flash, digital I/O mouth, A/D analog input.The analog signal that A/D samples is into delivered to the A/D ALT-CH alternate channel of DSP Digital Control module 107, DSP Digital Control module 107 realizes the A/D conversion by software algorithm, and the pwm signal of two groups of two-way complementations of output carries out duty ratio modulation to main circuit after isolating amplification through the high-frequency drive module.DSP Digital Control module 107 also presets and shows in real time by the output voltage electric current of human-computer interface module 108 paired pulses MIG weldering inverters, be connected with the outer monitoring system by bus RS232/485 and host computer, CAN2.0B, realize communicating by letter between DSP Digital Control module 107 and host computer and outer monitoring system.
As shown in Fig. 7 a1, Fig. 7 a2, Fig. 7 a3, Fig. 7 a4, Fig. 7 a5, Fig. 7 a6, Fig. 7 a7, Fig. 7 a8, Fig. 7 b1, Fig. 7 b2 and Fig. 7 b3, be the circuit theory diagrams of DSP Digital Control module of the present utility model, DSP Digital Control module 107 comprises power supply changeover device TPS7333Q, the active crystal oscillator of system control chip TMS320LF2407A, 30MHz, storage chip IS61LV12816, RS232 bus driver MAX232ACPE and CAN bus driver PCA82C250.Wherein, power transfer module TPS7333Q with externally fed power supply+5V level conversion become system control chip TMS320LF2407A+the 3.3V level; TMS320LF2407A mainly realizes the voltage and current from the inverter of two parallel connections sampling gained is carried out the A/D conversion row operation of going forward side by side, more recently drives main circuit IGBT according to the PWM duty of operation values output corresponding frequencies, realizes the PWM duty ratio modulation; The active crystal oscillator of 30MHz provides basic clock signal for control chip, and chip internal obtains the 40MHz dominant frequency after through 1.33 times of frequencys multiplication; Storage chip IS61LV12816 mainly realizes the data storage of human-computer interface module; Control system communicates by bus driver MAX232ACPE and PCA82C250 and host computer and outer monitoring system, and be connected with human-computer interface module 108 by IDE standard interface CN2, show in real time given and feedback voltage and the electric current of Pulse MIG Welding Power Source system.The core control strategy of control system is as follows: the voltage and current sample signal of two bridge inverter main circuits in parallel ADCIN0 by the DSP control chip～ADCIN3 mouth is respectively delivered to inner A/D ALT-CH alternate channel, carries out corresponding A/D conversion and PWM duty ratio modulation by software.The utility model adopts the RTDX module of the software platform CCStudio V3.3 IDE of American TI Company to control the adjustment of parameter.
As described in Figure 8; the software of this software flow pattern design is mainly the control with output voltage and electric current of reading that realizes the A/D transformation result, realizes namely that the adjustable pwm pulse of dutycycle produces, the duty ratio modulation of driving pulse, stage pulse are switched, constant current control and error protection.The operation principle of control system program is: when also allowing welding after system initialization, program enters the striking program, it comprises SECO (supply gas, wire feed etc.), wire feed striking at a slow speed, when electric current greater than certain value, and after extending a period of time, program enters base value and peak pulse cycle stage: the constant current of carrying out background current in the base value stage is controlled, when the base value time to or base value voltage turn to peak phase during less than the given voltage threshold of base value; Carry out the constant current of peak point current controls at peak phase, after entering peak phase 2.5ms, peak value arc voltage and the set-point that collects compared, obtain the base value time by FUZZY ALGORITHMS FOR CONTROL, the stability that reaches arc length by changing the base value time is controlled, when time to peak to or crest voltage enter again the base value stage during greater than the given voltage threshold of peak value.In the pulse cycle process, constantly check the welding stop signal, stop welding instruction in case receive, program enters to be received the arc control stage, stops at last welding and the new arc welding gun switch signal of circular wait.
Above-described embodiment is the better embodiment of the utility model; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, within being included in protection domain of the present utility model.
Claims (8)
1. parallel great power pulse MIC welding inverter system based on DSP, comprise three-phase alternating current input electrical network, main circuit, arc load, human-computer interface module and control circuit, described control circuit comprises DSP Digital Control module, it is characterized in that, described main circuit comprises the first main circuit and the second main circuit, described the first main circuit and the second main circuit are parallel with one another, described the first main circuit is identical with the circuit structure of the second main circuit, all comprise the input rectifying filtration module of electrical connection successively, the high-frequency inversion module, power voltage changing module and output rectification filter module, described input rectifying filtration module is connected with three-phase alternating current input electrical network, described output rectification filter module is connected with arc load.
2. a kind of parallel great power pulse MIC welding inverter system based on DSP according to claim 1, it is characterized in that, described control circuit comprises first control circuit and second control circuit, first control circuit is connected with second control circuit by DSP Digital Control module, the circuit structure of described first control circuit and second control circuit is identical, all comprise the error protection module that an end all is connected with DSP Digital Control module, the high-frequency drive module, the electric current and voltage detection module, the other end of described error protection module is connected with three-phase alternating current input electrical network, the other end of described high-frequency drive module is connected with the high-frequency inversion module, the other end of described electric current and voltage detection module is connected with arc load.
3. a kind of parallel great power pulse MIC welding inverter system based on DSP according to claim 1, it is characterized in that, described DSP Digital Control module is comprised of a digital signal processor, by the control of a digital signal processor realization to the first main circuit and the second main circuit.
4. a kind of parallel great power pulse MIC welding inverter system based on DSP according to claim 3, is characterized in that, described DSP Digital Control module is connected with human-computer interface module, and control human-computer interface module; Described digital signal processor adopts the TMS320LF2407A chip, regulates the peak value of pulse base value stage electric current of main circuit and switches output.
5. a kind of parallel great power pulse MIC welding inverter system based on DSP according to claim 3, is characterized in that, the embedded task manager of digital signal processor, and described task manager has pwm unit.
6. a kind of parallel great power pulse MIC welding inverter system based on DSP according to claim 2; it is characterized in that, the error protection module comprises interconnective over-voltage detection circuit, undervoltage detection circuit, over-current detection circuit, excess temperature testing circuit and AND circuit.
7. a kind of parallel great power pulse MIC welding inverter system based on DSP according to claim 1, is characterized in that, described high-frequency inversion module comprises converter bridge switching parts pipe group.
8. a kind of parallel great power pulse MIC welding inverter system based on DSP according to claim 2, is characterized in that, described high-frequency drive module comprises the TLP250 opto-coupler chip, and described TLP250 opto-coupler chip has 4; Described high-frequency drive module is strengthened rear input high-frequency inversion module with the pwm signal of DSP Digital Control module output, as the switching signal of converter bridge switching parts pipe group.
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| CN102672310A (en) * | 2012-05-23 | 2012-09-19 | 华南理工大学 | Parallel type high-power impulse MIG (metal inert gas) welding inversion power supply system based on DSP (digital signal processor) |
| CN103658933A (en) * | 2013-12-18 | 2014-03-26 | 华南理工大学 | All-digital variable polarity multifunctional square-wave pulse welding source |
| WO2014198069A1 (en) * | 2013-06-14 | 2014-12-18 | 深圳市瑞凌实业股份有限公司 | Control method for fully digital gas shielded welding machine and device thereof |
| CN104362883A (en) * | 2014-11-07 | 2015-02-18 | 中国人民解放军海军工程大学 | Portable pulse demagnetization working power supply with supercapacitor energy storage function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672310A (en) * | 2012-05-23 | 2012-09-19 | 华南理工大学 | Parallel type high-power impulse MIG (metal inert gas) welding inversion power supply system based on DSP (digital signal processor) |
| CN102672310B (en) * | 2012-05-23 | 2015-10-28 | 华南理工大学 | Based on the parallel great power pulse MIC welding inverter system of DSP |
| WO2014198069A1 (en) * | 2013-06-14 | 2014-12-18 | 深圳市瑞凌实业股份有限公司 | Control method for fully digital gas shielded welding machine and device thereof |
| CN104321158A (en) * | 2013-06-14 | 2015-01-28 | 深圳市瑞凌实业股份有限公司 | Control method for fully digital gas shielded welding machine and device thereof |
| CN103658933A (en) * | 2013-12-18 | 2014-03-26 | 华南理工大学 | All-digital variable polarity multifunctional square-wave pulse welding source |
| CN104362883A (en) * | 2014-11-07 | 2015-02-18 | 中国人民解放军海军工程大学 | Portable pulse demagnetization working power supply with supercapacitor energy storage function |
| CN111521948A (en) * | 2020-06-15 | 2020-08-11 | 温州大学激光与光电智能制造研究院 | Arc-breaking fault detection circuit and detection method based on filter inductor voltage |
| CN111521948B (en) * | 2020-06-15 | 2022-07-26 | 温州大学激光与光电智能制造研究院 | Detection method of arc-breaking fault detection circuit based on filter inductance voltage |
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