CN101860072A - Multi-power parallel-combination welding power supply - Google Patents
Multi-power parallel-combination welding power supply Download PDFInfo
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- CN101860072A CN101860072A CN 201010149307 CN201010149307A CN101860072A CN 101860072 A CN101860072 A CN 101860072A CN 201010149307 CN201010149307 CN 201010149307 CN 201010149307 A CN201010149307 A CN 201010149307A CN 101860072 A CN101860072 A CN 101860072A
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- 238000003466 welding Methods 0.000 title claims abstract description 76
- 238000007493 shaping process Methods 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000005669 field effect Effects 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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Abstract
The invention discloses a multi-power parallel-combination welding power supply, aiming at providing a welding power supply which has simple structure principle, independently controls the current of parallel power supplies, keeps the total output current constant, allows each power supply to output non-equalizing current and is stable and reliable in work. The multi-power parallel-combination welding power supply comprises a parallel-combination welding power supply formed by at least two independent inverted power supplies; the welding power supply formed by parallel combination of at least two groups of power supplies is provided with a first current closed-loop control circuit (circuit B), in the first current closed-loop control circuit (circuit B), each parallel inverted power supply group is driven by the output end of a welding current control board, the output ends of all the parallel inverted power supply are connected in parallel and then output to a welding port through a current divider, and the first current closed-loop (circuit B) is used for making the total output current of the parallel power supply group be constant after superposition; and in addition, the parallel inverted power supply groups are respectively connected to a driver with current-limiting protection to form second power current closed-loop control circuits (circuits A) which are mutually independent. The invention solves the problems of power tube rupture accidents and power supply damage which are frequently caused by current unbalance in the prior art.
Description
Technical field
The present invention relates to a kind of power-supply device that uses in manual welding, gas shielded arc welding, submerged-arc welding, electroslag welding, plasma welding and the plasma cutting that comprises.
Technical background
In the prior art, be used for automatically or the source of welding current of manual welding equipment, normally by the three-phase commutation bridge group, filter circuit, inverse switch circuit, control circuit, the single power supply that drive circuit secondary commutation circuit etc. are formed.The general source of welding current that constitutes by the unitary class power supply, because the welding of welding surroundings, the especially main equipment of the bigger welding current of can not satisfying the demand, and the requirement that does not reach required electric current.As Beijing epoch, Shandong Thailand difficult to understand, the good scholar in Shenzhen, Sweden Yi Sa company adopted as shown in Figure 3 only be the two-in-parallel power supply welding equipments of two these type of power supplys formations in parallel.This power-supply device is that a kind of each power supply that do not allow is exported unbalanced electric current, the power-supply device that cost of manufacture is higher, circuit debugging is difficult.
The source of welding current of this two-in-parallel system, owing in whole welding current scope, be difficult to accomplish fully balancedly output current, in welding process, when if a cover power-fail or damage are wherein arranged, welding system will be out of control immediately, cause current interruption or be stained with phenomenons such as arc, bring serious problems of welded quality.Because the Current Control of parallel connection power supply is independent on the source of welding current shunt circuit of above-mentioned two-in-parallel system, can not prevent that primary and secondary electric current is excessive, and damages the high power contravariant device.Often the welding running in, the operation job insecurity of power supply.The reliability extreme difference of electric current output is difficult to avoid each power supply to export unbalanced electric current, therefore current unbalance takes place often, and startling stricken power supply pipe explosion accident takes place, and causes whole power supply to be scrapped.
Summary of the invention
Export unbalanced shortcoming in order to overcome prior art two-in-parallel source of welding current electric current, task of the present invention is that a kind of structural principle of proposition is simple, the parallel connection power supply Current Control is independent, total output current is invariable, and can allow each power supply to export unbalanced electric current, it is very reliable and stable to work, and debugging difficulty is little, many parallel welding power source systems that are particularly suitable for producing in enormous quantities.
Above-mentioned purpose of the present invention can reach by following measure, a kind of multi-power parallel-combination welding power supply, comprise, the Combination Welding power supply in parallel that at least two platform independent inverters constitute, it is characterized in that, in at least by two groups of power parallel-combination welding power supplies, be provided with a circuit that drives each parellel inversion power group through welding current control board output, after the output parallel connection of each parellel inversion power group, behind shunt, export soldering opening to, make the output total current of stack back parallel connection power supply group keep the constant first current closed-loop control loop (B loop); And in each parellel inversion power group, all be connected with the driver of band current-limiting protection separately, and the separate second source current closed-loop control loop (A loop) that constitutes
The present invention has following beneficial effect than prior art:
The present invention inserts a shunt at total output of parellel inversion power, the first current closed-loop control loop system that makes it, and it can make the output total current after the stack of parallel connection power supply group keep constant, has guaranteed that the total current output after the stack parallel connection is stable.
The present invention dispose a driving box that has Current limited Control on the logical inverter of every Daepori, thus the second current closed-loop control loop of the normal power of being made up of inverter and current-limiting protection circuit of formation.The reliability and stability of normal power have been improved greatly.This current closed-loop loop is played in whole normal power and is prevented that primary and secondary electric current is excessive, and damages the effect (being Current limited Control) of high power contravariant device, thereby has protected the reliability of inversion welding system work.Therefore work as them and be parallel to a time-out, driver protection inverter separately separately simultaneously also allows each normal power, allows unbalanced electric current output.Make this normal power can carry out numerous parallel connection and be combined into possibility.Big electric current after the combination in parallel after the primary current closed-loop control, can obtain constant big electric current output.Further avoided prior art that current unbalance takes place often, the defective of power supply booster has taken place.
The current-limiting protection circuit that the present invention will have the current-limiting protection function combines with the inversion driver, and each driver is configured to separately in each inverter, forms the separate current control of power supply, has guaranteed the reliability service of each normal power.Because the current-limiting protection that each normal power all is provided with.Can allow each normal power group to export unbalanced electric current, but when the total output current of welding, it is invariable that the electric current of output keeps, and then guaranteed that the stable, reliable of whole welding power source system moves, for improving welding quality, the scope of application of expanding the source of welding current provides development space, many parallel welding power source systems that are particularly suitable for producing in enormous quantities.
Because the present invention allows each normal power to export unbalanced current value, the total output of welding current constant constant, therefore, greatly reduce the difficulty of debugging, stack in parallel is become is more prone to.
Description of drawings
Fig. 1 is the circuit diagram of an embodiment of multi-power parallel-combination welding power supply of the present invention.
Fig. 2 is the drive circuit schematic diagram of band Current limited Control of the present invention.
Fig. 3 is present widely used two-in-parallel circuit diagram.
Embodiment
Consult Fig. 1 and Fig. 2.Normal power is made of an inverter and a driver that has Current limited Control.Many the combination in parallel sources of welding current of the present invention are to have Current limited Control by two at least to drive the Combination Welding power-supply system in parallel that box and independent inverter constitute.In at least by two groups of power parallel-combination welding power supply systems, be provided with a circuit that drives each parellel inversion power group through welding current control board output, after the output parallel connection of each parellel inversion power group, behind shunt, export soldering opening to, make the output total current of stack back parallel connection power supply group keep the first constant current closed-loop control loop, i.e. B loop; And in each parellel inversion power group, all be connected with the driver of band current-limiting protection separately, and the separate second source current closed-loop control loop that constitutes, i.e. A loop.In other words, this second source current closed-loop control loop is that shunt is arranged on the total outlet line of parallel connection power supply group, directly enters the total current closed feedback loop of Current Control plate formation by the signal of current feedback line.
Above-mentioned second source current closed-loop control loop A can be contained in Current limited Control usually and drive in the box.Being connected in parallel on the parallel connection power supply group in first current closed-loop control B loop, can be to be made up of two these inverters of stylobate at least, all contains an independently closed control circuit in each normal power, in order to guarantee the reliability of normal power.In the combinations thereof welding power source system, can choose a normal power wantonly as main power source, remaining then is an accessory power supply.Such as the normal power that is connected in parallel in the circuit by first group is main power source, and all the other normal powers that are parallel in the circuit are accessory power supply.The quantity of normal power in the parallel power supply system is determined by the size of required total output current.As be the welding system that is composed in parallel by eight normal powers in Fig. 1, wherein first normal power is a main power source, and all the other seven normal powers are accessory power supply.Welding current can be 1000A, and the electric current of each normal power output can be 125A, and at this moment, the size of each normal power output current only is 62.5% of a rated value.The current-limiting protection ability can be set in 80% of rated value, i.e. 160A.
In Fig. 1, normal power has three control lines directly to link to each other with the welding current control board, in these three line traffic controls, has one to be in order to detecting the Voltage Feedback line of arc voltage, and two is in order to detect the reactance connecting line of welded condition in addition.The Voltage Feedback line is connected the output of the rectifier diode of described main power source, the other end is connected on the voltage detecting circuit of welding current control board, other two reactor output line one ends are connected on the out put reactor of main power source, and the other end is connected on the current detection circuit of welding current control board.
Consult Fig. 2.The current-limiting protection circuit that is connected on the inverter comprises; with instrument transformer TR2 time level terminals E1, last bridge-type filter rectifier that is connected of E2 and the capacitor C 12 that on parallel resistance R14, R15, diode D16, contact parallel resistance R10, R111, voltage stabilizing didoe D15 shunt circuit, is connected, and be connected in parallel on C12 and be connected on the integrated circuit (IC) 1A of pulse input end parallel connection on the resistance R 16 and integrated circuit (IC) 1B, the IC1C of three parallel connections, the pulse threshold circuit of IC1D composition.The inversion driver that links to each other with the pulse threshold circuit, comprise, pulse signal is delivered to field effect transistor T10 grid, and the bleeder circuit of being made up of resistance R 13 and R12 and two are connected on the T10 circuit, the T10 amplifying signal are reached voltage stabilizing didoe D18, the D17 of shaping circuit.
The 380V three-phase alternating-current supply, through secondary commutation current circuit and secondary transformation TR1, instrument transformer TR2, through D11-D14 bridge-type filter rectifier, behind the rectifying and wave-filtering, become direct voltage+560V B, be added on the diode D1 and high power contravariant pipe T1 on the secondary transformer loop, 0VB voltage is added on diode D2 and the high power contravariant pipe T2.Wherein, constitute half pushing-type inverter circuit by diode D1 and D2 and high power contravariant pipe T1 and T2, when high power contravariant pipe T1 and T2 conducting, primary current is at first by the 560VB direct voltage, behind high power contravariant pipe T1, arrive the elementary of the elementary of instrument transformer TR2 and welding transformer TR1 again, turn back to 0VB by high power contravariant pipe T2 at last.
When inverter turn-offed, welding transformer TR1 energy stored was deposited in the DC power supply of getting back to 560VB again by diode D1 and D2, and welding current is secondary by welding transformer TR1, again through exporting behind the secondary commutation circuit.
Pulse signal on resistance R 16, is input to the input of integrated circuit (IC) 1A by pulse input end again.When the primary current of welding transformer during less than cut-off current, the port of the integrated circuit (IC) 1B of three parallel connections, IC1C, IC1D is low level, at this moment, three integrated circuits allow the pulse signal of IC1A to pass through, and anti-phasely output on the resistance R 13 after once, after resistance R 13 and R12 dividing potential drop, pulse signal is delivered to the grid of field effect transistor T10, after T10 amplifies, again through the isolation of pulse transformer TR3, reach two independently shaping circuits (shaping circuit 1 and shaping circuit 2), remove to drive high power contravariant power tube T1 and T2.
When the welding transformer primary current increases, the secondary current of instrument transformer TR2 also strengthens thereupon, and secondary current enters the rectifier bridge that is made of fast diode D11 to D14 by terminals E1 and E2, after filtering capacitor C10 filtering, add to voltage stabilizing didoe D15.
When primary current does not reach the cut-off current value, not conducting of voltage stabilizing didoe D15.So capacitor C12 does not have voltage, integrated circuit (IC) 1B is to IC1D, normal output pulse signal.
When the primary current of welding transformer meets or exceeds the cut-off current value, voltage on the capacitor C10 exceeds the conducting voltage of voltage stabilizing didoe D15, voltage stabilizing didoe D15 conducting, voltage add to another input of capacitor C12 and IC1B to IC1D by resistance R 10.At this moment, the input of the integrated circuit (IC) 1B to IC1D of three parallel connections is a high level, has sealed the output of IC1B and IC1D, so cut off the pulse input, has reached the purpose of current limliting.
When welding transformer primary current during less than cut-off current, diode D15 open circuit, the voltage on the capacitor C10 is low level.Integrated circuit (IC) 1B to IC1D recovers pulse signal output again.Welding transformer returns to operating state again.
Claims (8)
1. multi-power parallel-combination welding power supply, comprise, the Combination Welding power supply in parallel that at least two platform independent inverters constitute, it is characterized in that, in at least by two groups of power parallel-combination welding power supplies, be provided with a circuit that drives each parellel inversion power group through welding current control board output, after the output parallel connection of each parellel inversion power group, behind shunt, export soldering opening to, make the output total current of stack back parallel connection power supply group keep the first constant current closed-loop control loop; And in each parellel inversion power group, all be connected with the driver of band current-limiting protection separately, and the separate second source current closed-loop control loop that constitutes.
2. multi-power parallel-combination welding power supply according to claim 1 is characterized in that, in described Combination Welding power-supply system, can choose a normal power wantonly as main power source, and remaining then is an accessory power supply.
3. multi-power parallel-combination welding power supply according to claim 1, it is characterized in that, main power source has three control lines directly to link to each other with the welding current control board, in these three line traffic controls, have one to be in order to detecting the Voltage Feedback line of arc voltage, two is in order to detect the reactance connecting line of welded condition in addition.
4. multi-power parallel-combination welding power supply according to claim 1, it is characterized in that, the Voltage Feedback line is connected the output of the rectifier diode of described main power source, the other end is connected on the voltage detecting circuit of welding current control board, other two reactor output line one ends are connected on the out put reactor of main power source, and the other end is connected on the current detection circuit of welding current control board.
5. multi-power parallel-combination welding power supply according to claim 1 is characterized in that, shunt is arranged on the total outlet line of parallel connection power supply group, and the signal by the current feedback line directly enters the Current Control plate and constitutes the total current closed feedback loop.
6. multi-power parallel-combination welding power supply according to claim 1; it is characterized in that; the current-limiting protection circuit that is connected on the inverter comprises; with TR2 level of instrument transformer terminals (E1; E2) the bridge-type filter rectifier that go up to connect and through parallel resistance R14; R15; diode D16; contact parallel resistance R10; R111; the capacitor C 12 that connects on the voltage stabilizing didoe D15 shunt circuit, and be connected in parallel on C12 and be connected on pulse input end integrated circuit (IC) 1A in parallel and integrated circuit (IC) 1B of three parallel connections on the resistance R 16; IC1C; the pulse threshold circuit that IC1D forms.
7. multi-power parallel-combination welding power supply according to claim 6, it is characterized in that, when the primary current of welding transformer during less than cut-off current, the integrated circuit (IC) 1B of three parallel connections, IC1C, the port of IC1D is low level, and three integrated circuits allow the pulse signal of IC1A to pass through, and anti-phasely output on the resistance R 13 after once, after resistance R 13 and R12 dividing potential drop, pulse signal is delivered to the grid of field effect transistor T10, after T10 amplifies, through the isolation of pulse transformer TR3, reach two independently shaping circuits (shaping circuit 1 and shaping circuit 2) again, remove to drive high power contravariant power tube T1 and T2.
8. multi-power parallel-combination welding power supply according to claim 1, it is characterized in that, the inversion driver that links to each other with the pulse threshold circuit, comprise, pulse signal is delivered to field effect transistor T10 grid, the bleeder circuit of being made up of resistance R 13 and R12 and two are connected on the T10 circuit, the T10 amplifying signal are reached voltage stabilizing didoe D18, the D17 of shaping circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010149307 CN101860072B (en) | 2010-04-19 | 2010-04-19 | Multi-power parallel-combination welding power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010149307 CN101860072B (en) | 2010-04-19 | 2010-04-19 | Multi-power parallel-combination welding power supply |
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| CN101860072A true CN101860072A (en) | 2010-10-13 |
| CN101860072B CN101860072B (en) | 2013-01-30 |
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| CN 201010149307 Expired - Fee Related CN101860072B (en) | 2010-04-19 | 2010-04-19 | Multi-power parallel-combination welding power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275540A (en) * | 2013-07-02 | 2015-01-14 | 株式会社大亨 | Output control method for welding power source |
| CN109361309A (en) * | 2018-10-31 | 2019-02-19 | 苏州汇川技术有限公司 | Parallelly connected reverse converter system and Wave-chasing current-limiting control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141833A (en) * | 1995-07-28 | 1997-02-05 | 北京汇佳物产技术公司 | Full-automatic arc light soldering machine |
| CN2265867Y (en) * | 1996-12-30 | 1997-10-29 | 江西大有科技有限公司 | Super microcrystalline iron core single-end inverse DC welder |
| CN2483135Y (en) * | 2001-07-11 | 2002-03-27 | 刘振英 | Large power inverter for welding use |
| TW200620778A (en) * | 2004-08-30 | 2006-06-16 | Monolithic Power Systems Inc | Short circuit current ratcheting in switch mode DC/DC voltage regulators |
| US20070188958A1 (en) * | 2006-02-15 | 2007-08-16 | Hitachi, Ltd. | Over-current detection circuit and method for power-supply device |
-
2010
- 2010-04-19 CN CN 201010149307 patent/CN101860072B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141833A (en) * | 1995-07-28 | 1997-02-05 | 北京汇佳物产技术公司 | Full-automatic arc light soldering machine |
| CN2265867Y (en) * | 1996-12-30 | 1997-10-29 | 江西大有科技有限公司 | Super microcrystalline iron core single-end inverse DC welder |
| CN2483135Y (en) * | 2001-07-11 | 2002-03-27 | 刘振英 | Large power inverter for welding use |
| TW200620778A (en) * | 2004-08-30 | 2006-06-16 | Monolithic Power Systems Inc | Short circuit current ratcheting in switch mode DC/DC voltage regulators |
| US20070188958A1 (en) * | 2006-02-15 | 2007-08-16 | Hitachi, Ltd. | Over-current detection circuit and method for power-supply device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275540A (en) * | 2013-07-02 | 2015-01-14 | 株式会社大亨 | Output control method for welding power source |
| CN104275540B (en) * | 2013-07-02 | 2017-09-15 | 株式会社大亨 | The output control method of the source of welding current |
| CN109361309A (en) * | 2018-10-31 | 2019-02-19 | 苏州汇川技术有限公司 | Parallelly connected reverse converter system and Wave-chasing current-limiting control method |
| CN109361309B (en) * | 2018-10-31 | 2021-08-27 | 苏州汇川技术有限公司 | Parallel inverter system and wave-by-wave current limiting control method |
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