CN102035300B - Multifunctional internal combustion arc welding generator - Google Patents
Multifunctional internal combustion arc welding generator Download PDFInfo
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- CN102035300B CN102035300B CN 201010611424 CN201010611424A CN102035300B CN 102035300 B CN102035300 B CN 102035300B CN 201010611424 CN201010611424 CN 201010611424 CN 201010611424 A CN201010611424 A CN 201010611424A CN 102035300 B CN102035300 B CN 102035300B
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Abstract
The invention relates to a multifunctional internal combustion arc welding generator. The generator comprises an internal combustion engine, a generator rotor, a trigger circuit, a silicon controlled rectifier switch, a three-phase bridge rectifier, an auxiliary power supply rectifier circuit, an excitation current adjusting circuit, a generator stator, a first switch tube T1, a second diode D2, a first capacitor C1, a first diode D1 and a chopping main loop. The invention provides a structure of a voltage controlled resistor and a control mode aiming at the problem of difficulty in parallel current sharing of a chopping switch tube; the controlled resistor is controlled by an outer ring negative feedback control loop consisting of a photoelectric coupler, an outer ring control circuit, an outer ring given circuit, an outer ring hall current sensor and a voltage sampling circuit; a constant current, constant current and out-pulling and flat hard external characteristic curve is output by selecting and switching a feedback signal output by the outer ring hall current sensor and the voltage sampling circuit; thus the requirements of argon arc welding, low-hydrogen electrode manual arc welding and cellulose electrode vertical down welding on the external characteristic curve and the welding process performance of a welding machine are met.
Description
Technical field
The present invention relates to field of welding devices, particularly a kind of internal combustion arc generator.
Background technology
Because welding procedure object and welding procedure condition is different, has expedited the emergence of different welding equipments and has segmented market, also research and development and the production to welding equipment has proposed different requirement.
On the Energy Mix of using, electric welding machine is classified, be divided into two big types of civil power type and self generation types.The basic characteristics of civil power type electric welding machine are to adopt commercially available alternating current as power supply, and it is more fixing to be mainly used in operation place such as industrial and mining enterprises, and electricity consumption occasion easily; And the characteristics of self generation type electric welding machine are engine (gasoline engine or diesel engine) driving generators; The welding current that sends is used for welding; Be mainly used in unpowered electricity supply; And need the welding procedure of mobile operation on-the-spot, like the on-the-spot installation of bridge, railway, highway, city planting ductwork, be specially adapted to the welding procedure operation of oil-gas pipeline and railway line.
Because the construction of long-distance transport pipes laying work has complicated, mobile big, the demanding characteristics of welding quality of constructing of weather conditions geographical environment, has determined the self generation type welding equipment of the first-selected technical grades of long-distance transport pipes.And; Because oil-gas pipeline belongs to the pressure container type welding procedure; Research and development and production to welding equipment are had higher requirement; Determined oil-gas pipeline welding procedure operation, must be pursue to adapt to new material new process, guarantee welding quality, improve welding productivity, improve environmental suitability, the reduction expense, to reduce aspects such as labor strength as for making great efforts target and developing direction.
Oil-gas pipeline welding procedure operation has developed and multiple welding technique and corresponding welding equipment.Wherein in small-bore pipeline, representational welding technique is: argon arc welding+low-hydrogen electrode manual metal-arc welding; For in bigbore pipeline, the welding technique of two kinds of representative high-efficiency high-qualities is: cellulose welding rod down hill welding+self-shield property of medicine welding wire semiautomatic welding.
The welding equipment that oil-gas pipeline welding procedure is at present used; Its main product structure mainly adopts engine (gasoline engine or diesel engine); Driving is wound with the power frequency generator output welding of welding winding and uses the three-phase main-frequency alternating current; And behind silicon controlled rectifier output required direct current; Realize direct regulation and control according to this controllable type power device of controllable silicon, thereby obtain required external characteristic curve output, to satisfy the requirement of " argon arc welding ", " low-hydrogen electrode manual metal-arc welding ", " the upright weldering downwards of cellulose welding rod " and " self-protection flux-cored wire semiautomatic welding " welding technique butt welding machine external characteristic curve, welding technological properties welding current.
And this wherein not merely is to solve technical problems such as reliability, overall structure; The more important thing is and adopt which kind of control mode; And parameter collocation how to confirm each key node of control loop, the welding technological properties and the adaptive high request of welding procedure of satisfied " the upright weldering downwards of cellulose welding rod " and " self-protection flux-cored wire semiautomatic welding " butt welding machine.Particularly for " self-protection flux-cored wire semiautomatic welding "; The dynamic responding speed of welding machine and response process; The droplet transfer mode and the transition opportunity that must fully adapt to the self-protection flux-cored wire semiautomatic welding; Not only to conveniently use, but also to avoid occurring such as: open arc lack of penetration, open arc pore, welding pore, welding incomplete fusion, welding slag inclusion, receiving that arc pore etc. is many maybe enhancing weld.
Because technical difficulty is excessive; Therefore have only a few main flow companies such as U.S. Lincoln company, U.S. Miller company, Italian Mo Sa company, the new big magnificent company of Japan to release comparatively ripe silicon controlled rectifier constructed products, and all have simultaneously the ability of generating electricity, welding.
The H300K type that company is transported in Chongqing has also solved the problems referred to above preferably, and its tangible technical characterstic is that employed controllable silicon also uses as electronic switch except that doing rectification simultaneously.Through the outer Tequ of decline carrying out property of the line dynamic scan that intermediate frequency generator is exported; Export required " constant current+drag " external characteristic curve and " flat hard " external characteristic curve outward; And satisfy butt welding machine welding technological properties and the adaptive high request of welding procedure, still kept compact conformation, little, the lightweight characteristics of volume simultaneously.But the generator of H300K type is an intermediate frequency generator, and itself just exports the decline external characteristic curve, and use is silicon-controlled rectifying switch.When carrying out property dynamic scan, be actually and between minimum and maximum decline external characteristic curve, switch, therefore control is comparatively coarse.
Along with welding material and welding procedure level constantly develop, the welding technological properties and the Technological adaptability of welding equipment proposed increasingly high requirement, therefore need further to improve fine degree to the welding current regulation and control.
Adopt general synchronous generator assembly high-performance inverter type welder, also can construct the integrated arc generator that can carry out high-accuracy regulation and control welding current.But the inversion major loop of inverter type welder is because of use isolating the problems such as dynamic magnetic biasing that the high frequency transformer used with step-down exists, and a series of faults that possibly bring, and inverter structure complicacy are brought difficulty to maintenance.
With U.S. Lincoln company, U.S. Miller company, Italian Mo Sa company is that the main flow company of representative does not all adopt inverter structure, but has adopted IGBT copped wave structure.Because be that welding current is directly regulated and control, and the finite capacity of single IGBT module, therefore be that little electric current arc generator adopts single IGBT module to carry out PWM copped wave; For the high current arc welding generator,, then need adopt the structure of two or many same model IGBT module parallel connections based on the size of welding current.But because the performance parameter dispersiveness of IGBT module itself is very big, when therefore directly parallelly connected, be difficult to guarantee to flow through the equilibrium of IGBT blocks current, can cause the good IGBT module of conducting the overload phenomenon to occur, thereby influence the reliability of complete machine.The copped wave major loop of U.S. Lincoln company has adopted the double winding filter inductance of particular design two IGBT modules to be carried out the structure of dynamic current equalizing.Test shows, the IGBT module of this kind structure, at each chopping cycle, the initial stage current-sharing effect of conducting phase is obvious, but in the latter stage of conducting phase, because the reduction of current changing rate, so the current-sharing effect obviously descends.Therefore need take to carry out the technical measures of IGBT module parameter screening pairing, the IGBT module pairing that just filters out the performance parameter basically identical is used.Therefore when the IGBT module damage, can not directly change the IGBT module, and still need IGBT module parameter screening pairing, otherwise can influence useful life, because IGBT module screening pairing complex process can be brought difficulty to maintenance because of not current-sharing.
Summary of the invention
The purpose of the utility model is to provide a kind of multi-functional internal combustion arc generator; Problem to chopping switching tube (like the IGBT module) parallel current-sharing difficulty; A kind of structure and control mode of thyrite are provided; Under the situation that does not need parameter screening pairing, just can realize the parallel current-sharing of chopping switching tube (like the IGBT module), and realize accurate parallel current-sharing.Further improve the reliability of complete machine, improve the convenient degree of maintenance.And thyrite copped wave major loop structure to development; Two close loop negative feedback control loop structures have been designed; When satisfying above-mentioned high request; Satisfy the requirement of welding technological properties, and realize " argon arc welding ", " low-hydrogen electrode manual metal-arc welding ", " the upright weldering downwards of cellulose welding rod " and " self-protection flux-cored wire semiautomatic welding ".
A kind of multi-functional internal combustion arc generator of the present invention comprises internal combustion engine, generator amature, circuits for triggering, silicon-controlled rectifying switch, three-phase bridge rectifier rectification, accessory power supply rectification circuit, exciting curent regulating circuit, generator unit stator, first switch transistor T
1, the second diode D
2With first capacitor C
1, the first diode D
1With the copped wave major loop; Outer holder winding, welding winding, accessory power supply winding, feedback winding and excitation winding are wherein arranged in the line embedding groove of stator, ask winding parallelly connected with the output same polarity of copped wave major loop through silicon-controlled rectifying switch outward, circuits for triggering connect silicon-controlled rectifying switch; The welding winding is exported the low-voltage, high-current direct current behind the three-phase bridge rectifier rectification and second capacitor filtering, this electric current is the arc load power supply through the copped wave major loop; The accessory power supply winding is output as the 220V DC power supply through the rectification of accessory power supply rectification circuit; The feedback winding connects first switch transistor T through the overdrive current regulating circuit
1Base stage, first switch transistor T
1Collector electrode connect generator amature; Excitation winding is through the second diode D
2With first capacitor C
1, the first diode D
1Be connected with stator.
Described exciting curent regulating circuit comprises rectifier filter circuit, excitatory comparing element, excitatory given circuit and excitation control circuit, and the feedback winding and the excitatory given circuit of process rectifier filter circuit are connected respectively to excitatory comparing element, first switch transistor T
1Base stage connect the output of excitatory comparing element through excitation control circuit, these links constitute the exciting curent negative feedback control circuit jointly.
Described silicon-controlled rectifying switch comprises first controllable silicon SCR
1, second controllable silicon SCR
2, the 3rd controllable silicon SCR
3, the 7th diode D
7, octode D
8With the 9th diode D
9Wherein, first controllable silicon SCR
1Connect the 7th diode D
7, second controllable silicon SCR
2Connect the 8th diode D
8, the 3rd controllable silicon SCR
3Connect the 9th diode D
9, three silicon controlled control system are installed on the same frame.
Described copped wave major loop has two-way at least; And each road copped wave major loop comprises switching tube, fly-wheel diode and the filter inductance that connects in order; Also have the drive circuit of switching tube and the absorption network of switching tube, the drive circuit of each switching tube is all by ring negative feedback control loop control in corresponding.Copped wave major loop in the utility model has the two-way of parallel connection, and one the tunnel comprises the second switch pipe T that connects in order
2, first sustained diode
5With the first filter inductance L
A, also have second switch pipe T
2Drive circuit (14) and by first resistance R
1, the 3rd diode D
3With the 3rd capacitor C
3The second switch pipe T that constitutes
2The absorption network; Another road comprises the 3rd switch transistor T that connects in order
3, second sustained diode
6With the second filter inductance L
B, also have the 3rd switch transistor T
3Drive circuit (15) and by second resistance R
2, the 4th diode D
4With the 4th capacitor C
4The 3rd switch transistor T that constitutes
3The absorption network.
Said second switch pipe T
2Drive circuit by ring Hall current sensor H in first
A, interior loop control circuit, the 6th resistance (R
f), the second switch pipe T that constitutes of controllable resistor and first filter circuit
2The control of interior ring negative feedback control loop; Said the 3rd switch transistor T
3Drive circuit by ring Hall current sensor H in second
B, the switch transistor T that constitutes of interior loop control circuit, the 6th resistance, controllable resistor and first filter circuit
3The control of interior ring negative feedback control loop.
In described loop control circuit comprise in second filter circuit, the 3rd filter circuit, first chain rate than chain rate in the link, second than ring PWM circuit for regulating and controlling in the ring PWM circuit for regulating and controlling and second in the link, first; Wherein, second filter circuit and the second interior ring PWM circuit for regulating and controlling are connected the first interior chain rate respectively than link, and ring PWM circuit for regulating and controlling is connected the second interior chain rate respectively than link in the 3rd filter circuit and first.
Said controllable resistor comprises the 4th switch transistor T
4, the 3rd resistance R
3, the 4th resistance R
4With the 5th resistance R
5Wherein, said the 5th resistance R
5Connect the 4th switch transistor T
4Base stage, the 4th resistance R
4Connect the 4th switch transistor T
4Collector electrode, the 3rd resistance R
5Connect the 4th switch transistor T
4Emitter and the 4th resistance R
4The outer shroud negative feedback control loop control that this controllable resistor is made up of photoelectrical coupler, outer loop control circuit, outer shroud given circuit, outer shroud Hall current sensor H and voltage sampling circuit.
Described outer loop control circuit comprises external characteristic change over switch K
1, the 5th filter circuit, the 6th filter circuit, outer shroud comparing element, outer shroud PWM circuit for regulating and controlling, thrust selector switch K
2, Thrust Control circuit, thrust given circuit, the 4th filter circuit and thrust comparing element; Wherein, thrust given circuit, the 4th filter circuit and Thrust Control circuit are connected the thrust comparing element respectively, the first external characteristic change over switch K
1-1, the second external characteristic change over switch K
1-2, the first thrust selector switch K
2-1Be connected the outer shroud comparing element respectively with outer shroud PWM circuit for regulating and controlling, the first external characteristic change over switch K
1-1Connect the 5th filter circuit or the 6th filter circuit, the second external characteristic change over switch K
1-2Connect drop characteristic given circuit or flat characteristic given circuit, the 3rd external characteristic change over switch K
1-3Connect the first thrust selector switch K
2-1Outer shroud given circuit wherein is divided into drop characteristic given circuit and flat characteristic given circuit.
Generator among the present invention is by motor driven; Be wound with welding winding and accessory power supply winding in the stator of generator simultaneously; The accessory power supply winding is output as the 220V DC power supply through the rectification of accessory power supply rectification circuit, and the welding winding is through rectifying and wave-filtering; And, realize generating and requirement of welding simultaneously by being the welding arc power supply after the copped wave major loop copped wave regulation and control.
The present invention has adopted the copped wave structure; Though inverter type welder and copped wave welding machine do not have difference in essence on control methods; But when adopting the copped wave structure; Structure is more succinct, and has avoided the problems such as dynamic magnetic biasing brought because of the high frequency transformer of use isolating and step-down is used at the inversion major loop, a series of faults that possibly cause.And visit the user and show that the copped wave structure belongs to low-pressure structure, its maintenance is much more simple and convenient than this high voltage structures of inversion.
Ring negative feedback control loop control in copped wave major loop among the present invention adopts; Speed-sensitive switch copped wave pipe carries out the high speed copped wave control of frequency up to tens of KHzs to the welding current that flows through; Therefore can scan output and not have several decline external characteristic curves; Therefore can realize required precision control effect, obtain more good dynamic indicator and the welding technological properties of H300K type that compares.
The present invention is owing to the drive circuit of switching tube is controlled by interior ring negative feedback control loop; Make the copped wave major loop have the thyrite characteristic; Can realize the accurate parallel current-sharing of two-way copped wave major loop, and guarantee and " self-protection flux-cored wire semiautomatic welding " droplet transfer mode and transition opportunity adapt.
The thyrite control method of the present invention's research and development; Not only can guarantee that chopping switching tube can accurate parallel current-sharing; Can also be according to the thyrite characteristic of copped wave major loop; The excessive transient state short-circuit current of avoiding chopping switching tube to occur, this is an important technique measure of guaranteeing chopping switching tube and whole system reliable operation; In addition, because can realize the accurate parallel current-sharing of switching tube, can make up the more jumbo source of welding current through increasing the way of copped wave major loop and corresponding interior ring negative feedback control loop.Simultaneously, when power demand is little, can only adopt one tunnel copped wave major loop and corresponding interior ring negative feedback control loop to make up the source of welding current of required low capacity, therefore also have modular architectural feature.
Copped wave major loop among the present invention has the thyrite characteristic; Controllable resistor is controlled by outer shroud negative feedback control loop; Complete machine can be exported " constant current ", " constant current+drag " and " flat hard " external characteristic curve outward, can satisfy the requirement of " argon arc welding ", " low-hydrogen electrode manual metal-arc welding ", " the upright weldering downwards of cellulose welding rod " and " self-protection flux-cored wire semiautomatic welding " welding technique butt welding machine external characteristic curve.
This controlling schemes not only can be guaranteed the chopping switching tube reliable operation; And can guarantee that complete machine has good dynamic characteristic, welding technological properties and welding procedure adaptability; Satisfy the oil-gas pipeline welding procedure, that welding quality requires is high, adapt to new material new process, guarantee welding quality, improve welding productivity, improve environmental suitability, the reduction expense, reduce the high request of labor strength.
Description of drawings
Fig. 1 is a structure principle chart of the present invention;
Fig. 2 is interior loop control circuit schematic diagram;
Fig. 3 is outer loop control circuit schematic diagram;
Fig. 4 is the controllable resistor schematic diagram;
Fig. 5 is silicon-controlled rectifying switch circuits for triggering schematic diagrams;
Fig. 6 is an exciting curent regulating circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Referring to a kind of multi-functional internal combustion arc generator shown in Figure 1, comprise internal combustion engine 1, generator amature 2, circuits for triggering 3, silicon-controlled rectifying switch 4, three-phase bridge rectifier rectification 5, accessory power supply rectification circuit 6, exciting curent regulating circuit 7, generator unit stator 8, first switch transistor T
1, the second diode D
2With first capacitor C
1, the first diode D
1With the copped wave major loop; It is characterized in that having in the line embedding groove of stator outer holder winding 9, welding winding 10, accessory power supply winding 11, feedback winding 12 and excitation winding 13; Outer holder winding 9 is parallelly connected with the output same polarity of copped wave major loop through silicon-controlled rectifying switch 4, and circuits for triggering 3 connect silicon-controlled rectifying switch 4; Welding winding 10 is through three-phase bridge rectifier 5 rectifications and second capacitor C
2Output low-voltage, high-current direct current after the filtering, this electric current is the arc load power supply through the copped wave major loop; Accessory power supply winding 11 is output as the 220V DC power supply through 6 rectifications of accessory power supply rectification circuit; Feedback winding 12 connects first switch transistor T through overdrive current regulating circuit 7
1Base stage, first switch transistor T
1Collector electrode connect generator amature 2; Excitation winding 13 is through the second diode D
2With first capacitor C
1, the first diode D
1Be connected with stator.
Referring to Fig. 1, the copped wave major loop can adopt multi-channel parallel, and present embodiment is an example with the two-way parallel connection, and one the tunnel comprises the second switch pipe T that connects in order
2, first sustained diode
5With the first filter inductance L
A, also have second switch pipe T
2Drive circuit (14) and second switch pipe T
2I.e. first resistance R of absorption network
1, the 3rd diode D
3With the 3rd capacitor C
3Another road comprises the 3rd switch transistor T that connects in order
3, second sustained diode
6With the second filter inductance L
B, also have the 3rd switch transistor T
3Drive circuit (15) and the 3rd switch transistor T
3I.e. second resistance R of absorption network
2, the 4th diode D
4With the 4th capacitor C
4Chopping switching tube can use FET, also can use the IGBT pipe, perhaps uses their module, and what use in the present embodiment is the IGBT pipe.
Referring to second switch pipe T illustrated in figures 1 and 2
2Drive circuit 14 by ring Hall current sensor H in first
A, interior loop control circuit 17, the 6th resistance R
f, the switch transistor T that constitutes of controllable resistor 18 and first filter circuit 16
2The control of interior ring negative feedback control loop; Said the 3rd switch transistor T
3Drive circuit 15 by ring Hall current sensor H in second
B, interior loop control circuit 17, the 6th resistance R
f, the switch transistor T that constitutes of controllable resistor 18, first filter circuit 16
3The control of interior ring negative feedback control loop.Ring Hall current sensor H in ring negative feedback control loop uses in the two-way
A, H
BThe electric current of gathering two-way copped wave major loop respectively is as feedback signal, divider resistance R
f, R
XGather the terminal voltage of copped wave major loop, as common given voltage, realize the accurate parallel current-sharing of two-way copped wave major loop thus, and make the copped wave major loop have the thyrite characteristic.This resistance string is connected in the welding major loop, is the external characteristic curve of arc load output decline.Through regulating R
XValue, promptly in the scalable control of ring negative feedback control loop give determining voltage signal: U
X=η U, thereby the value of regulating this thyrite, and regulate welding output.
Comprise first controllable silicon SCR referring to silicon-controlled rectifying switch shown in Figure 54
1, second controllable silicon SCR
2, the 3rd controllable silicon SCR
3, the 7th diode D
7, octode D
8With the 9th diode D
9Wherein, first controllable silicon SCR
1Connect the 7th diode D
7, second controllable silicon SCR
2Connect the 8th diode D
8, the 3rd controllable silicon SCR
3Connect the 9th diode D
9
Comprise rectifier filter circuit 42, excitatory comparing element 41, excitatory given circuit 43 and excitation control circuit 40 referring to exciting curent regulating circuit 7 shown in Figure 6; Feedback winding 12 through rectifier filter circuit 42 is connected respectively to excitatory comparing element 41 with excitatory given circuit 43; Wherein, first switch transistor T
1Base stage connect the output of excitatory comparing element 41 through excitation control circuit 40, these links constitute the exciting curent negative feedback control circuit jointly.
Referring to interior loop control circuit 17 shown in Figure 2 comprise in second filter circuit 23, the 3rd filter circuit 26, first chain rate than chain rate in the link 24, second than ring PWM circuit for regulating and controlling 28 in the ring PWM circuit for regulating and controlling 27 and second in the link 25, first; Wherein, second filter circuit 23 and the second interior ring PWM circuit for regulating and controlling 28 are connected the first interior chain rate respectively and are connected the second interior chain rate respectively than link 25 than ring PWM circuit for regulating and controlling 27 in link 24, the three filter circuits 26 and first.
Comprise external characteristic change over switch K referring to outer loop control circuit 20 shown in Figure 3
1, the 5th filter circuit 32, the 6th filter circuit 33, outer shroud comparing element 35, outer shroud PWM circuit for regulating and controlling 34, thrust selector switch K
2, Thrust Control circuit 31, thrust given circuit 29, the 4th filter circuit 30 and thrust comparing element 38; Wherein, the second external characteristic change over switch K
1-2Connect drop characteristic given circuit 36 or flat characteristic given circuit 37, thrust given circuit 29, the 4th filter circuit 30 and Thrust Control circuit 31 are connected thrust comparing element 38, the first external characteristic change over switch K respectively
1-1, the second external characteristic change over switch K
1-2, the first thrust selector switch K
2-1Be connected outer shroud comparing element 35, the three external characteristic change over switch K respectively with outer shroud PWM circuit for regulating and controlling 34
1-3Connect the first thrust selector switch K
2-1, the second external characteristic change over switch K
1-2Connect drop characteristic given circuit 36 or flat characteristic given circuit 37; Outer shroud given circuit 21 wherein is divided into drop characteristic given circuit 36 and flat characteristic given circuit 37.
As external characteristic change over switch K
1When placing " P " position, its contact first external characteristic change over switch K
1-1With the second external characteristic change over switch K
1-2With the 5th filter circuit 32, flat characteristic given circuit 37, outer shroud comparing element 35, outer shroud PWM circuit for regulating and controlling 34, voltage sampling circuit 22 and switch transistor T
2, T
3Interior ring negative feedback control loop be connected into the arc voltage negative feed back control system; Automatically the resistance of ring thyrite in regulating; Resistance through ring thyrite in regulating; Scanning output " flat hard " external characteristic curve satisfies the requirement of " self-protection flux-cored wire semiautomatic welding " butt welding machine output " flat hard " external characteristic curve.
As external characteristic change over switch K
1When placing " J " position, its contact K
1-1, K
1-2With filter circuit 33, with characteristic given circuit 36, outer shroud comparing element 35, outer shroud PWM circuit for regulating and controlling 34, outer shroud Hall current sensor H and switch transistor T
2, T
3Interior ring negative feedback control loop be connected into the welding current negative feed back control system; Automatically the resistance of ring thyrite in regulating; Resistance through ring thyrite in regulating; Scanning output " constant current " or " constant current+drag outward " external characteristic curve satisfies the requirement of " argon arc welding ", " low-hydrogen electrode manual metal-arc welding ", " the upright weldering downwards of cellulose welding rod " butt welding machine output " constant current " or " constant current+drag " external characteristic curve outward.
As external characteristic change over switch K
1Place " J " position, thrust selector switch K
2When placing " 1 ", " 2 " position, contact K
1-3, K
2-1Thrust Control circuit 31, thrust given circuit 29, thrust comparing element 38, filter circuit 30 are connected with outer shroud comparing element 35.Thrust selector switch K
2When placing " 1 " position, its contact K
2-2The signal input part of the trigger control circuit 39 in the circuits for triggering 3 of silicon-controlled rectifying switch 4 is connected to evoked potential "+V
CC" on, maximum thrust control is provided, the requirement of " the upright weldering downwards of cellulose welding rod " butt welding machine output " constant current+drag " external characteristic curve is satisfied in " constant current+drag outward " external characteristic curve output that thrust output is maximum outward; As thrust selector switch K
2When placing " 2 " during the position; Silicon-controlled rectifying switch 4 is closed; Only Thrust Control circuit 31, thrust given circuit 29, thrust comparing element 38, filter circuit 30 are connected; Less Thrust Control is provided, and the requirement of " low-hydrogen electrode manual metal-arc welding " butt welding machine output " constant current+drag " external characteristic curve is satisfied in " constant current+drag outward " external characteristic curve output that thrust output is less outward.
As external characteristic change over switch K
1Place " J " position, thrust selector switch K
2Thrust Control is not provided when placing " 3 " position, and the requirement of " argon arc welding " butt welding machine output " constant current " external characteristic curve is satisfied in the output of output " constant current " external characteristic curve.
Test shows; " thyrite dynamic scan " control technology that the present invention proposes first and develops; Not only can obtain required " constant current ", " constant current+drag " and " flat hard " external characteristic curve output easily outward; In the total current adjustable range He in the full voltage adjustable range, good dynamic quality and welding technological properties have all been obtained; Satisfy welding procedure " argon arc welding ", " the upright weldering downwards of cellulose welding rod " and " self-protection flux-cored wire semiautomatic welding " welding technological properties of welding technique butt welding machine and the high request of Technological adaptability of oil-gas pipeline, and be built into multi-functional internal combustion arc generator.
Claims (4)
1. a multi-functional internal combustion arc generator comprises internal combustion engine (1), generator amature (2), circuits for triggering (3), silicon-controlled rectifying switch (4), three-phase bridge rectifier (5), accessory power supply rectification circuit (6), exciting curent regulating circuit (7), generator unit stator (8), first switch transistor T
1, the second diode D
2With first capacitor C
1, the first diode D
1With the copped wave major loop; It is characterized in that having in the line embedding groove of generator unit stator (8) outer holder winding (9), welding winding (10), accessory power supply winding (11), feedback winding (12) and excitation winding (13); Outer holder winding (9) is parallelly connected with the output same polarity of copped wave major loop through silicon-controlled rectifying switch (4), and circuits for triggering (3) connect silicon-controlled rectifying switch (4); Welding winding (10) is through three-phase bridge rectifier (5) rectification and second capacitor C
2Output low-voltage, high-current direct current after the filtering, this electric current is the arc load power supply through the copped wave major loop; Accessory power supply winding (11) is output as the 220V DC power supply through accessory power supply rectification circuit (6) rectification; Feedback winding (12) connects first switch transistor T through exciting curent regulating circuit (7)
1Base stage, first switch transistor T
1Collector electrode connect generator amature (2); Excitation winding (13) is through the second diode D
2With first capacitor C
1, the first diode D
1Be connected with generator amature (2);
Exciting curent regulating circuit (7) comprises rectifier filter circuit (42), excitatory comparing element (41), excitatory given circuit (43) and excitation control circuit (40); Feedback winding (12) and excitatory given circuit (43) through rectifier filter circuit (42) are connected respectively to excitatory comparing element (41); Wherein, first switch transistor T
1Base stage connect the output of excitatory comparing element (41) through excitation control circuit (40), these links constitute the exciting curent negative feedback control circuit jointly;
The copped wave major loop has the two-way of parallel connection, and one the tunnel comprises the second switch pipe T that connects in order
2, first sustained diode
5With the first filter inductance L
A, also have second switch pipe T
2Drive circuit (14) and by first resistance R
1, the 3rd diode D
3With the 3rd capacitor C
3The second switch pipe T that constitutes
2The absorption network; Another road comprises the 3rd switch transistor T that connects in order
3, second sustained diode
6With the second filter inductance L
B, also have the 3rd switch transistor T
3Drive circuit (15) and by second resistance R
2, the 4th diode D
4With the 4th capacitor C
4The 3rd switch transistor T that constitutes
3The absorption network;
Second switch pipe T
2Drive circuit (14) by ring Hall current sensor H in first
A, interior loop control circuit (17), the 6th resistance R
f, the second switch pipe T that constitutes of controllable resistor (18) and first filter circuit (16)
2The control of interior ring negative feedback control loop; Said the 3rd switch transistor T
3Drive circuit (15) by ring Hall current sensor H in second
B, interior loop control circuit (17), the 6th resistance R
f, the switch transistor T that constitutes of controllable resistor (18), first filter circuit (16)
3The control of interior ring negative feedback control loop.
2. multi-functional internal combustion arc generator according to claim 1, it is characterized in that interior loop control circuit (17) comprise in second filter circuit (23), the 3rd filter circuit (26), first chain rate than chain rate in the link (24), second than encircling PWM circuit for regulating and controlling (28) in the ring PWM circuit for regulating and controlling (27) and second in the link (25), first; Wherein, second filter circuit (23) and the second interior ring PWM circuit for regulating and controlling (28) are connected the first interior chain rate respectively than link (24), and ring PWM circuit for regulating and controlling (27) is connected the second interior chain rate respectively than link (25) in the 3rd filter circuit (26) and first.
3. multi-functional internal combustion arc generator according to claim 1 is characterized in that controllable resistor (18) comprises the 4th switch transistor T
4, the 3rd resistance R
3, the 4th resistance R
4With the 5th resistance R
5Wherein, the 5th resistance R
5Connect the 4th switch transistor T
4Base stage, the 4th resistance R
4Connect the 4th switch transistor T
4Collector electrode, the 3rd resistance R
3Connect the 4th switch transistor T
4Emitter and the 4th resistance R
4The outer shroud negative feedback control loop control that this controllable resistor (18) is made up of photoelectrical coupler (19), outer loop control circuit (20), outer shroud given circuit (21), outer shroud Hall current sensor H and voltage sampling circuit (22).
4. multi-functional internal combustion arc generator according to claim 3 is characterized in that outer loop control circuit (20) comprises external characteristic change over switch K
1, the 5th filter circuit (32), the 6th filter circuit (33), outer shroud comparing element (35), outer shroud PWM circuit for regulating and controlling (34), thrust selector switch K
2, Thrust Control circuit (31), thrust given circuit (29), the 4th filter circuit (30) and thrust comparing element (38); Wherein, thrust given circuit (29), the 4th filter circuit (30) and Thrust Control circuit (31) are connected thrust comparing element (38) respectively, the first external characteristic change over switch K
1-1, the second external characteristic change over switch K
1-2, the first thrust selector switch K
2-1Be connected outer shroud comparing element (35) respectively with outer shroud PWM circuit for regulating and controlling (34), Thrust Control circuit (31) connects the 3rd external characteristic change over switch K
1-3, the first external characteristic change over switch K
1-1Connect the 5th filter circuit (32) or the 6th filter circuit (33), the second external characteristic change over switch K
1-2Connect drop characteristic given circuit (36) or flat characteristic given circuit (37), the 3rd external characteristic change over switch K
1-3Connect the first thrust selector switch K
2-1Outer shroud given circuit (21) wherein is divided into drop characteristic given circuit (36) and flat characteristic given circuit (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010611424 CN102035300B (en) | 2010-12-29 | 2010-12-29 | Multifunctional internal combustion arc welding generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010611424 CN102035300B (en) | 2010-12-29 | 2010-12-29 | Multifunctional internal combustion arc welding generator |
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| Publication Number | Publication Date |
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| CN102035300A CN102035300A (en) | 2011-04-27 |
| CN102035300B true CN102035300B (en) | 2012-12-12 |
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| CN 201010611424 Expired - Fee Related CN102035300B (en) | 2010-12-29 | 2010-12-29 | Multifunctional internal combustion arc welding generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102825361B (en) * | 2012-09-17 | 2015-02-04 | 邓小健 | Portable multifunctional field operation electric welding machine |
| CN103414285B (en) * | 2013-08-30 | 2016-03-02 | 维尔纳（福建）电机有限公司 | A kind of generating, the dual-purpose machine of electric welding |
| CN106270892B (en) * | 2015-06-03 | 2018-09-11 | 徐州市嘉迪汽车电器有限公司 | A kind of fusing soldering welder of motor copper conductor |
| IT201700106957A1 (en) * | 2017-09-25 | 2019-03-25 | Bcs Spa | WELDING MACHINE AND METHOD OF CONTROL OF THE SAME |
| CN114221559B (en) * | 2021-12-14 | 2023-09-22 | 广东福德电子有限公司 | On-load power supply of excitation generator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201947114U (en) * | 2010-12-29 | 2011-08-24 | 重庆运达科技有限公司 | Multifunctional internal-combustion arc welding generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002096166A (en) * | 2000-09-18 | 2002-04-02 | Hitachi Via Mechanics Ltd | Arc welding apparatus |
| CN2549650Y (en) * | 2002-06-03 | 2003-05-07 | 重庆运达焊接设备有限公司 | Multi-performance internal combustion power generator for arc-welding |
| CN2762933Y (en) * | 2004-07-15 | 2006-03-08 | 成都熊谷电器工业有限公司 | Chopped wave type arc welding set driven by internal combustion engine |
| US9647555B2 (en) * | 2005-04-08 | 2017-05-09 | Lincoln Global, Inc. | Chopper output stage for arc welder power source |
| US8502115B2 (en) * | 2009-06-11 | 2013-08-06 | Illinois Tool Works Inc. | Engine driven welder-generator with chopper circuit |
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| CN201947114U (en) * | 2010-12-29 | 2011-08-24 | 重庆运达科技有限公司 | Multifunctional internal-combustion arc welding generator |
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