CN1369348A - Intelligent multifunctional inverse-conversion power supply for cutting/welding - Google Patents
Intelligent multifunctional inverse-conversion power supply for cutting/welding Download PDFInfo
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- CN1369348A CN1369348A CN 01107133 CN01107133A CN1369348A CN 1369348 A CN1369348 A CN 1369348A CN 01107133 CN01107133 CN 01107133 CN 01107133 A CN01107133 A CN 01107133A CN 1369348 A CN1369348 A CN 1369348A
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Abstract
A multifunctional intelligent invert-conversion power supply for welding and/or cutting has an intelligent controler between rectifying filter and fast-restoration filter. A common output of multi-power transformer is connected to welding/cutting output via selection switches. Its advantages are the integration of circuit selection, welding and cutting, and high adaptability to manual arc welding, DC argon arc welding, air-plasma cutting, etc.
Description
The present invention relates to inverter, be specifically related to intelligent multifunctional contravariant welding/cutting power supply, belong to electric and electronic technical field.
Before the seventies, all arc-welding, cutting power supply all are to adopt traditional Industrial Frequency Transformer leakage reactance formula or magnetic amplifier type, and its major defect is that power-efficient is low, the volume heaviness, and control characteristic is regulated difficulty, uses inconvenience.Along with capacity, the performance of power electronic device improves greatly, brought revolutionary opportunity for the development of Arc Welding Power, cutting power supply.1972, United States Marines scientific research department succeeded in developing first 300A IGCT contravariant arc welding power source.Now, nearly all in the world welding equipment manufacturer all develops and production inversion welding/cutting power supply as the fiery Miller of the U.S., Hypon, the ESAB of Sweden, Osaka transformer of Japan, the willing ratio of Finland, the companies such as Metz of Germany.China's inversion welding source just begins development at the initial stage eighties, and nineteen eighty-two, South China Science ﹠ Engineering University develops first 50A inversion FET manual metal-arc welding power supply model machine.Now, China has up to a hundred inversion welding source manufacturers, as brilliant lock contravariant arc welding power sources of batch process such as ring electrical apparatus factories in Sichuan Electronic Welder Co., Ltd., the Tianjin, Beijing Ken Wote power electronics scientific ﹠ technical corporation, the Huashan, Xi'an machinery plants etc. produce the FET contravariant arc welding power source in batches, and the electric manufacturing company of the good spirit in Chengdu, Beijing epoch, SGN also once produced the IGBT contravariant arc welding power source in batches.But present homemade contravariant arc welding power source, total characteristics are: (1) function singleness, mostly welding, cutting are independently equipment; (2) all power conversion devices of contravariant arc welding power source are mainly based on IGCT, purposes is still based on manual electric arc welding, it is power conversion device that minority producer adopts IGBT, but, make the IGBT welding machine stamp the branding of " unreliable " at numerous customer centers owing to many-sided reasons such as control method, resist technology, device qualities; (3) homemade air plasma cutting power supply mostly adopts traditional leakage reactance device formula magnetic amplifier silicon rectification circuit, and volume is big, and efficient is low; (4) control circuit of inverter arc welding/cutting power supply is mainly based on discrete component, and intelligent degree is not high, and the human-computer dialogue difficulty is higher to the personnel's of manipulating competency profiling.
The objective of the invention is to overcome and state deficiency on the prior art, a kind of multifunctional inversion type welding/cutting power supply of one-machine-multi-function Based Intelligent Control is provided.
Realize above-mentioned purpose, the present invention adopts following proposal to realize:
Intelligent multifunctional contravariant welding/cutting power supply comprises power supply rectification filter circuit, inverter circuit, intermediate frequency current rectifying and wave filtering circuit, it is characterized in that:
1) the input power supply connects IGBT high-frequency inverter circuit, inversion by the three-phase main-frequency rectification circuit
The road is transformed into high-frequency ac pulse more than the 20KHz with DC voltage;
2) establish many power transformers, the high frequency voltage output of its input termination inverter circuit, warp
High frequency voltage descending and by after fast-recovery commutation, the filtering output for the welding or the cutting;
3) be provided with output and fast recovery that intelligence control circuit is connected to power supply rectification filter circuit
Between the stream filter circuit output;
4) many power transformers output is established public output and is connected welding through selecting to open K1, K2
/ cutting output, public output are established transformer and are connected the intelligence control through high-frequency arc ignition circuit 4
The system circuit.Described intelligence control circuit is made up of microprocessor 1, microprocessor 2 and control protection electric circuit 3, and microprocessor and control protection electric circuit are made up of single-chip microcomputer and software and peripheral circuit.Described single-chip microcomputer adopts 89,80,87 or 196 series all can.The microprocessor 2 of described intelligence control circuit is connected with electromagnetic gas valve 5, the switch of control air valve.
The present invention is power conversion device with IGBT, adopt the double mcu PREDICTIVE CONTROL, electric current and voltage dicyclo feedback, solved the selection of inverter main circuit type, welding and the unification of cutting, external characteristics determines during the inverter welding, determining of inversion welding source adjusting function, determining of inversion welding source dynamic characteristic, electric requirement when cutting technique cuts inverter, high-frequency and high-voltage striking and the High-frequency Interference that causes thus suppress, key technical problems such as the reliability design of inverter, with manual metal-arc welding, dc argon arc welding, the air plasma cutting is molten to be one, has reached energy-efficient, a tractor serves several purposes, reliable and stable, reduce user's production use cost, working service is purpose easily.
Major advantage compared to existing technology:
1. one-machine-multi-function: have multiple functions such as manual metal-arc welding, argon arc welding, plasma cutting.
2. Based Intelligent Control: voltage during to welding/cutting and electric current are monitored and dicyclo control in real time, make this machine working stability, attractive in appearance, the smooth cut of weld seam.
3. PREDICTIVE CONTROL, fault self-diagnosis: system carries out self diagnosis to overvoltage, under-voltage, overcurrent, overheated, power supply phase shortage, operate miss etc., and carries out PREDICTIVE CONTROL, can operate at full capacity continuously.
4. antijamming capability is strong: this machine adopts multiple interference protection measure, has eliminated the strong electromagnetic that high-frequency arc strike produces, and makes the reliable and stable work of single-chip microcomputer and digital watch energy.
5. easy for operation: no matter be manual welding, argon arc welding, still cutting, all by computer program control, the user of service only need click switch and get final product in all work.
The invention will be further described below in conjunction with drawings and embodiments.
Fig. 1 is an overall circuit structure chart of the present invention.
Embodiment: as shown in Figure 1, the present invention includes power supply three-phase main-frequency current rectifying and wave filtering circuit, IGBT high-frequency inverter circuit, how main power transformer, intermediate frequency rectification circuit, establish intelligence control circuit between the output of three-phase main-frequency current rectifying and wave filtering circuit and the output of fast-recovery commutation filter circuit, three-phase alternating current forms direct current through full-bridge rectification filtering, change into high-frequency ac pulse more than the 20KHz by IGBT inversion parts, use for welding or cutting through high frequency voltage descending and after by fast recovery rectifier diode, reactor rectifying and wave-filtering.Intelligence control circuit adopts dual micro processor control; form by microprocessor 1, microprocessor 2 and control protection electric circuit 3; microprocessor 2 receives output signal and feeds back to microprocessor 1 input; carry out self diagnosis by 3 pairs of system's overvoltages of control protection electric circuit, under-voltage, overcurrent, overheated, power supply phase shortage, operate miss etc.; and carry out PREDICTIVE CONTROL, can operate at full capacity continuously.6 is accessory power supplys among the figure.Thereby microprocessor 1 is adjusted the input signal of the signal control IGBT high-frequency inverter circuit of microprocessor 2 and control protection electric circuit 3.Use the present invention only to need selector switch K
1, K
2The usefulness that can weld or cut.
IGBT of the present invention is a power conversion device, adopts the double mcu PREDICTIVE CONTROL, and electric current and voltage dicyclo feedback has solved selection, the welding of inverter main circuit type and the unification of cutting, and cutting manual metal-arc welding, dc argon arc welding, air plasma molten is one.
Above-mentioned power supply is used for the 380V alternating current, but output floating voltage stepping is 70-210V, during the output current welding: 10-250A, DC, during cutting: 10-30A, DC, conversion efficiency 〉=90%, all numbers of power 〉=0.90, weight 32kg, operating temperature-5-40 ℃.The present invention has manual electric arc welding, dc argon arc welding, air plasma cutting function and constant current are fallen suddenly, constant current is dragged outward, constant voltage external characteristics such as dam, volume is little, in light weight, energy-efficient, the cyclic duration factor height, the electric current high-speed range is wide, striking is easy, arc stability, the molten bath is dark, it is little to splash, cut is dark, otch is attractive in appearance, modification is little, both be fit to oil, chemical industry, electric power, railway, bridge, the mine, construction and maintenance of equipment etc. need the frequent occasion that moves, and also are fit to the processing and manufacturing of needs high capacity water holdup welding/cutting power supplies such as product lot quantity production and large scale structure.
Claims (4)
1. intelligent multifunctional contravariant welding/cutting power supply comprises power supply rectification filter circuit, inverter circuit, intermediate frequency current rectifying and wave filtering circuit, it is characterized in that:
1) the input power supply connects IGBT high-frequency inverter circuit, inversion by the three-phase main-frequency rectification circuit
The road is transformed into high-frequency ac pulse more than the 20KHz with DC voltage;
2) establish many power transformers, the high frequency voltage output of its input termination inverter circuit, warp
High frequency voltage descending and by after fast-recovery commutation, the filtering output for the welding or the cutting;
3) be provided with output and fast recovery that intelligence control circuit is connected to power supply rectification filter circuit
Between the stream filter circuit output;
4) many power transformers output is established public output and is connected welding through selecting to open K1, K2
/ cutting output, public output are established transformer and are connected the intelligence control through high-frequency arc ignition circuit 4
The system circuit.
2. welding/cutting power supply as claimed in claim 1 is characterized in that: described intelligence control circuit is made up of microprocessor 1, microprocessor 2 and control protection electric circuit 3, and microprocessor and control circuit are made up of single-chip microcomputer and software and peripheral circuit.
3. welding/cutting power supply as claimed in claim 2 is characterized in that: the microprocessor 2 of described intelligence control circuit is connected with electromagnetic gas valve 5, the switch of control air valve.
4. welding/cutting power supply as claimed in claim 2 is characterized in that: described single-chip microcomputer adopts 89,80,87 or 196 series all can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107133 CN1369348A (en) | 2001-02-16 | 2001-02-16 | Intelligent multifunctional inverse-conversion power supply for cutting/welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107133 CN1369348A (en) | 2001-02-16 | 2001-02-16 | Intelligent multifunctional inverse-conversion power supply for cutting/welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1369348A true CN1369348A (en) | 2002-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01107133 Pending CN1369348A (en) | 2001-02-16 | 2001-02-16 | Intelligent multifunctional inverse-conversion power supply for cutting/welding |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075783B (en) * | 2007-06-01 | 2010-05-26 | 武汉大学 | Three-phase medium-frequency DC high-voltage power supply for ESP |
| CN101941114A (en) * | 2010-08-27 | 2011-01-12 | 无锡华联科技集团有限公司 | Plasma arc initiating device |
| CN101966618A (en) * | 2010-11-12 | 2011-02-09 | 深圳市华意隆实业发展有限公司 | Reactor-free and shunt-free current type PWM inverter type welding cut power supply |
| CN104174982A (en) * | 2014-07-31 | 2014-12-03 | 佛山中用自动化装备有限公司 | Plasma/argon-arc welding machine system and control method |
| CN112548271A (en) * | 2020-12-14 | 2021-03-26 | 上海威特力焊接设备制造股份有限公司 | Automatic change multi-functional AC/DC welding machine of polarity |
-
2001
- 2001-02-16 CN CN 01107133 patent/CN1369348A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075783B (en) * | 2007-06-01 | 2010-05-26 | 武汉大学 | Three-phase medium-frequency DC high-voltage power supply for ESP |
| CN101941114A (en) * | 2010-08-27 | 2011-01-12 | 无锡华联科技集团有限公司 | Plasma arc initiating device |
| CN101941114B (en) * | 2010-08-27 | 2012-08-29 | 无锡华联科技集团有限公司 | Plasma arc initiating device |
| CN101966618A (en) * | 2010-11-12 | 2011-02-09 | 深圳市华意隆实业发展有限公司 | Reactor-free and shunt-free current type PWM inverter type welding cut power supply |
| CN104174982A (en) * | 2014-07-31 | 2014-12-03 | 佛山中用自动化装备有限公司 | Plasma/argon-arc welding machine system and control method |
| CN104174982B (en) * | 2014-07-31 | 2016-05-11 | 佛山中用自动化装备有限公司 | A kind of plasma/argon arc welding welder system and control method |
| CN112548271A (en) * | 2020-12-14 | 2021-03-26 | 上海威特力焊接设备制造股份有限公司 | Automatic change multi-functional AC/DC welding machine of polarity |
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