CN206811288U - 220V and 380V dual power supply IGBT inverter argon arc welding machines and circuit - Google Patents

Abstract

It the utility model is related to inverter type welder technical field, concretely it is 220V and 380V dual power supply IGBT inverter argon arc welding machines and circuit, the utility model can adjust for different input current grade and load duration curve, main operation is exactly the parameter for a small amount of component for changing circuit board top, it is possible to achieve different arcing time factors.The characteristic of welding machine can be changed using different fast recovery diode and transformer, output reactance simultaneously, support the input of 220V and 380V dual-supply voltages, the inverter type welder of a variety of welding application methods, solves the limitation of single power supply power supply, possess two kinds of functions of manual welding and argon arc welding simultaneously, improve the adaptability of welding machine, the structure design of optimization reduces production cost, adds the reliability and cost performance of welding machine.

Description

220V and 380V dual power supply IGBT inverter argon arc welding machines and circuit

Technical field

Inverter type welder technical field is the utility model is related to, is concretely 220V and 380V dual power supply IGBT inversion argon arcs Welding machine and circuit.

Background technology

With the manufacturing fast development in the world, welding technique is using more and more extensive, and welding technique level is also increasingly It is high.New welding technique continues to bring out, and professional welding equipment makes rapid progress.At present, plasma cutting inverter has become welding machine The main competitive method in product market, argon arc welding play most important as a kind of efficient welding technique in welding field Effect.Meanwhile the performance of welding machine is not only embodied in the advanced above of technology, also largely depends on the knot of welding machine above In the Machine Design of structure design and some hommizations.The structure design of optimization causes welding engineer in welding process more It is convenient, welding efficiency is not only increased, while also improve the quality of welding.

At present at home and abroad above market, the volume of single-phase 220V either three-phase 380V IGBT contravariant argon arc welding machine devices Electric current is determined typically in 200A to 400A or so, and cyclic duration factor is generally 20% ~ 60% level.Three-phase 380V this kind of welding machine production Product are all the argon arc welding machines using IGBT module inversion.Has plenty of unifunctional, some and with manual welding function.Such The cost of product is higher, and comparatively price is just higher, and certain limitation is so just had when market sale. Single-phase 220V and three-phase 380V dual power supply inverter argon arc welding machine device is commercially uncommon, plus the machine of manual welding function Device is exactly more rare.This is one of subject matter to be solved in the utility model.

For multi-purpose machine, different bond patterns can be used, adapts to different welding occasions and welding original paper, The accommodation of welding machine is just relatively wider in this case, and fitness is higher.Manual welding is mainly used in the welding of simple part, It is well suited for using under the occasion of no gas shield simultaneously.The market competitiveness of this kind of product is mainly in the design of machine. Different circuits has very big difference in the cost for designing and producing above.Circuit in the design process, including component Model, accuracy selection, the layout of circuit board and wiring etc. can have influence on the service behaviour of welding machine.In overall design It is envisaged that this three parts of cost, production and performance, how with minimum cost to realize that efficient function is urgently to solve Certainly the problem of.This is two that the utility model needs to solve the problems, such as.

Existing market is mainly in terms of welding performance and Machine Design above for the selection of welding machine.The structure of optimization Design aspect is welding engineer in one of important indicator of selection welding machine.Be first welding machine interface need meet absolutely it is big The use habit of groups of people, the regulation of welding current will keep convenient and accurate.Welding machine needs progressively simple in structure design Change, but the performance of welding machine can not be influenceed.How the outward appearance and performance of welding machine is not influenceed while machine structure is simplified, this It is three that the utility model needs to solve the problems, such as.

Welding machine component heating in part in the case of normal work is serious, can so have a strong impact on the load continuous of machine Rate, therefore most of welding machine is all the cyclic duration factor for increasing welding machine using different means in the market.It is most general Method is exactly the power of component used in increase and optimization Duct design.It can not only be carried when using powerful component High production cost, while can also increase the volume of machine, the layout of circuit board is influenceed, so being most using the Duct design of optimization Effective method.How using more preferable air channel come reduce welding machine operation caused by heat, this is that the utility model needs to solve The four of certainly the problem of.

Designed for this kind of reliability is high, structure and performance are good 220V and 380V dual power supply IGBT inverter argon arc welding machines and Control circuit is extremely necessary.

The content of the invention

The utility model breaches the problem of prior art, devises the 220V that a kind of reliability is high, structure and performance are good With 380V dual power supply IGBT inverter argon arc welding machines and circuit.

In order to achieve the above object, the utility model devises 220V and 380V dual power supply IGBT inverter argon arc welding machines, bag Include cabinet, blower fan, mainboard, control panel, it is characterised in that：Four base angles of chassis backplane outer surface are respectively fixed with under-chassis, machine The outside of the rear board of case is provided with radiator one, and the top of radiator one is provided with fan shroud, and the both sides of fan shroud are provided with rectifier bridge, The top of fan shroud is provided with input power cord, and the side of input power cord is provided with input switch, and the inner side of cabinet rear board is provided with Blower fan and magnetic valve, the rear of blower fan are provided with radiator two, and the side of radiator two is provided with radiator three, the lower section of radiator three Provided with IGBT module, the side of radiator three is connected with support column, and the rear of radiator two is provided with mainboard, and mainboard is provided with fast extensive Multiple diode, high-frequency inductor, transformer, mainboard are connected with control panel, and control panel is between mainboard and case front panel, control The lower section of plate is provided with copper bar, and young waiter in a wineshop or an inn's core mounting seat is connected with copper bar, and case front panel is provided with change-over switch, knob, plug Component, two core aviation sockets, the top of cabinet are provided with handle.

The utility model have also been devised the circuit of 220V and 380V dual power supply IGBT inverter argon arc welding machines, including：Main control Circuit, 220V and 380V voltage conversion circuits, switching power circuit, IGBT drive controls circuit, magnetic valve and high frequency control electricity Road, draught fan control circuit, booster circuit, control circuit, it is characterised in that：Main control circuit is as follows：Rectifier bridge BR No. 1 port Be divided into two-way, one end with AC1 ports, electric capacity C1 is connected respectively, and the electric capacity C1 other end is divided into two-way, respectively with AC2 ports, Rectifier bridge BR No. 3 ports, rectifier bridge BR No. 2 ports are divided into seven tunnels, respectively one end with electric capacity C4, electric capacity C5 one end, Resistance R2 one end, electric capacity C7 one end, IGBT pipes Q2 emitter stage, IGBT pipes Q4 emitter stage, DC- ports are connected, electric capacity The C7 other end is divided into seven tunnels, respectively one end with electric capacity C2, the electric capacity C5 other end, electric capacity C3 one end, resistance R2 it is another One end, resistance R1 one end, the electric capacity C7 other end, electric capacity C6 one end are connected, and rectifier bridge BR No. 4 ports are divided into two-way, One end with thermistor RT, relay J1 one end are connected respectively, and the relay J1 other end is divided into eight tunnels, respectively with temperature-sensitive The resistance RT other end, the electric capacity C2 other end, the electric capacity C3 other end, the resistance R1 other end, electric capacity C6 the other end, IGBT pipes Q1 current collection end, IGBT pipes Q3 current collection end, DC+ ports are connected, and IGBT pipes Q1 transmitting terminal is divided into three tunnels, respectively with E1 port, IGBT pipes Q2 current collection end, relay J2 No. 3 ports are connected, and IGBT pipes Q1 base stage is connected with G1 ports, IGBT Pipe Q2 base stage is connected with G3 ports, and IGBT pipes Q3 transmitting terminal is divided into three tunnels, respectively with E2 ports, IGBT pipes Q4 current collection End, transformer T1 No. 2 ports are connected, and IGBT pipes Q3 base stage is connected with G2 ports, and IGBT pipes Q4 base stage is connected with G4；Institute No. 4 ports for stating relay J2 are divided into two-way, and No. 1 port with transformer T2, transformer T2 No. 4 ports are connected respectively, after Electrical equipment J2 No. 5 ports are connected with transformer T2 No. 3 ports, No. 1 port of the transformer T1 and transformer T2 No. 2 ends Mouth is connected, and transformer T1 No. 3 ports are connected with CT No. 2 ports, and transformer T1 No. 4 ports are connected with CT No. 1 port, Transformer T2 No. 5 ports are divided into four tunnels, respectively one end with diode D2 ', diode D1 ' one end, the one of diode D1 End, resistance R3 one end are connected, and the resistance R3 other end is connected with resistance R4 one end, and the resistance R4 other end is with electric capacity C8's One end is connected, and the electric capacity C8 other end is divided into eight tunnels, respectively the other end with diode D1 ', the diode D1 other end, two poles Pipe D2 ' the other end, diode D2 one end, diode D3 one end, diode D3 ' one end, electric capacity C9 one end, VOUT + port is connected, and transformer T2 No. 6 ports are divided into two classes, is connected respectively with transformer T2 No. 7 ports, VOUT- ports, becomes Depressor T2 No. 8 ports are divided into four tunnels, respectively the other end with diode D2, the diode D3 ' other end, diode D3 it is another One end, resistance R5 one end are connected, and the resistance R5 other end is connected with resistance R6 one end, resistance the R6 other end and electric capacity C9 The other end be connected.

220V the and 380V voltage conversion circuits are as follows：DC+ ports are connected with voltage-regulator diode Z1 one end, voltage stabilizing two The pole pipe Z1 other end is connected with voltage-regulator diode Z2 one end, the voltage-regulator diode Z2 other end and resistance R7 one end phase Even, the resistance R7 other end is divided into two-way, and No. 1 port with photoelectrical coupler U1A, resistance R8 one end are connected respectively, resistance The R8 other end is divided into two-way, and No. 2 ports with DC- ports, photoelectrical coupler U1A are connected respectively, and the 3 of photoelectrical coupler U1A Number port is divided into four tunnels, and the colelctor electrode with triode Q22, resistance R11 one end, ground, electric capacity C10 one end are connected respectively, Photoelectrical coupler U1A No. 4 ports are divided into two-way, and one end with resistance R9, triode Q22 base stage are connected respectively, resistance R9 The other end be divided into two-way, one end with+15V power supplys, resistance R10 is connected respectively, and the resistance R10 other end is divided into four tunnels, point Emitter stage, the resistance R11 other end, the electric capacity C10 other end, amplifier U1D No. 12 port phases not with triode Q22 Even, amplifier U1D No. 11 ports are connected with 5V power supplys, and amplifier U1D No. 14 ports are connected with FET T3 gate pole, FET T3 source ground, FET T3 drain electrode are divided into four tunnels, respectively one end with diode D4, relay J7 No. 2 ports, amplifier U17C No. 9 ports, electric capacity C11 one end be connected, the diode D4 other end and the 1 of relay J7 Number port is connected, and relay J7 No. 3 ports are connected with e1 port, and relay J7 No. 4 ports are divided into two-way, respectively with transformation Device T2 No. 1 port, transformer T2 No. 4 ports are connected, and relay J7 No. 5 ports are connected with transformer T2 No. 3 ports, Transformer T2 No. 2 ports are connected with E2 ports, and the electric capacity C11 other end is divided into six tunnels, respectively one end with resistance R12, electricity Hinder R13 one end, electric capacity C12 one end, voltage-regulator diode Z5 one end, amplifier U14A No. 3 ports, amplifier U16B No. 6 ports are connected, and the resistance R12 other end is connected with+15V power supplys, and the resistance R13 other end is divided into three tunnels, respectively with electric capacity The C12 other end, ground, the voltage-regulator diode Z5 other end is connected, and amplifier U17C No. 10 ports are divided into five tunnels, respectively with Amplifier U16B No. 4 ports, resistance R14 one end, resistance R15 one end, electric capacity C13 one end, electric capacity C14 one end phase Even, the resistance R14 other end is divided into two-way, and the other end with ground, electric capacity C13 is connected respectively, and the electric capacity C14 other end is divided into Three tunnels, respectively the other end with resistance R15, resistance R16 one end, amplifier U14A No. 2 ports be connected, resistance R16's is another One end is connected with+15V power supplys, and amplifier U14A No. 1 port is connected with diode D5 one end, the diode D5 other end point For two-way, one end with diode D6, SHDN ports are connected respectively, the diode D6 other end and amplifier U16B No. 7 ends Mouth is connected, and amplifier U17C No. 8 ports are connected with diode D7 one end, diode the D7 other end and 380-0/220-1 Port is connected.

The switching power circuit is as follows：Power supply chip U7 VFB ports are connected with electric capacity C17 one end, electric capacity C17's The other end is divided into three tunnels, respectively the COMP ports with power supply chip U7, photoelectrical coupler U2B No. 3 ports, the one of resistance R19 End is connected, and resistance R19 other end ground connection, photoelectrical coupler U2B No. 4 ports are connected with VREF ports, power supply chip U7's RT/CT ports are divided into two-way, and one end with resistance R17, electric capacity C15 one end are connected respectively, electric capacity C15 other end ground connection, The resistance R17 other end is connected with power supply chip U7 VREF ports, and the ISNS ports of power supply chip are divided into two-way, respectively with electricity Resistance R18 one end, electric capacity C16 one end is connected, electric capacity C16 other end ground connection, resistance the R18 other end and CFB ports phase Even, power supply chip U7 GND ports ground connection, power supply chip U7 OUT terminal mouth are connected with resistance R20 one end, and resistance R20's is another One end is connected with FET T11 gate pole, and FET T11 source electrode is divided into two-way, respectively one end with resistance R21, CFB Port is connected, and resistance R21 other end ground connection, FET T11 drain electrode is divided into two-way, respectively with the one of diode D9 End, transformer T12 No. 10 ports are connected, and the diode D9 other end is divided into two-way, respectively one end with electric capacity C19, resistance R22 one end is connected, and the resistance R22 other end is divided into three tunnels, respectively the other end with electric capacity C19, vdd terminal mouth, transformer T12 No. 12 ports be connected, transformer T12 No. 7 ports are connected with diode D8 one end, and the diode D8 other end is divided into three Road, respectively one end with power supply chip U7 VCC ports, electric capacity C18 one end, electric capacity C20 be connected, the electric capacity C18 other end It is divided into three tunnels, No. 8 ports with ground, the electric capacity C20 other end, transformer T12 are connected respectively, transformer T12 No. 1 port It is connected with diode D11 one end, the diode D11 other end is divided into four tunnels, respectively one end with electric capacity C23, electric capacity C24 One end, diode D12 one end ,+15V power supplys are connected, and the diode D12 other end is connected with diode D13 one end, two poles The pipe D13 other end is connected with diode D14 one end, and the diode D14 other end is connected with+12V power supplys, electric capacity C24's The other end is divided into six tunnels, respectively with ground, the electric capacity C23 other end, transformer T12 No. 3 ports, electric capacity C22 one end, electricity One end, transformer T12 No. 5 ports for holding C21 are connected, and the electric capacity C22 other end is divided into three tunnels, another with electric capacity C21 respectively One end ,+24V power supplys, diode D10 one end are connected, and the diode D10 other end is connected with transformer T12 No. 6 ports； No. 1 port of the photoelectrical coupler U2B is connected with resistance R24 one end, the resistance R24 other end and resistance R23 one end It is connected, the resistance R23 other end is divided into two-way, respectively No. 2 ports with photoelectrical coupler U2B, voltage-regulator diode Z6 one end It is connected, the voltage-regulator diode Z6 other end is connected with voltage-regulator diode Z7 one end, voltage-regulator diode Z7 other end ground connection.

The IGBT drive controls circuit is as follows：PWM-A ports are divided into four tunnels, respectively one end with electric capacity C25, resistance R25 one end, resistance R26 one end, electric capacity C26 one end are connected, and the electric capacity C25 other end is divided into two-way, respectively with resistance The R25 other end, voltage-regulator diode Z8 one end are connected, and the voltage-regulator diode Z8 other end is connected with triode Q11 base stage, Triode Q11 emitter stage is divided into two-way, and one end with resistance R29, triode Q25 emitter stage are connected respectively, resistance R29's The other end is connected with+15V power supplys, and the electric capacity C26 other end is divided into two-way, respectively the other end with resistance R26, voltage-regulator diode Z11 one end is connected, and the voltage-regulator diode Z11 other end is connected with triode Q26 base stage, triode Q26 colelctor electrode point For two-way, the colelctor electrode with triode Q11, transformer TR3 No. 1 port are connected respectively, triode Q26 grounded emitter, PWM-B ports are divided into four tunnels, respectively one end with electric capacity C27, resistance R27 one end, resistance R28 one end, the one of electric capacity C28 End is connected, and the electric capacity C27 other end is divided into two-way, and the other end with resistance R27, voltage-regulator diode Z9 one end are connected respectively, The voltage-regulator diode Z9 other end is connected with triode Q25 base stage, and the electric capacity C28 other end is divided into two-way, respectively with resistance The R28 other end, voltage-regulator diode Z10 one end are connected, the voltage-regulator diode Z10 other end and triode Q27 base stage phase Even, triode Q27 colelctor electrode is divided into two-way, and the colelctor electrode with triode Q25, transformer TR3 No. 2 ports are connected respectively, Triode Q27 grounded emitter, transformer TR3 No. 3 ports are divided into two-way, respectively with diode D15 one end, resistance R30 one end is connected, and the resistance R30 other end is connected with resistance R31 one end, and the resistance R31 other end is with triode Q28's Base stage is connected, and triode Q28 emitter stage is divided into three tunnels, respectively the other end with diode D15, resistance R32 one end, resistance R33 one end is connected, and the resistance R32 other end is divided into four tunnels, respectively the other end with resistance R33, the one of voltage-regulator diode Z12 End, one end of resistance R34, G1 ports are connected, and the other end of resistance R34 is divided into four tunnels, respectively with e1 port, voltage-regulator diode The Z12 other end, triode Q28 colelctor electrode, transformer TR3 No. 4 ports are connected, and transformer TR3 No. 7 ports are divided into two Road, it is connected respectively with diode D16 one end, resistance R35 one end, the resistance R35 other end and resistance R36 one end phase Even, the resistance R36 other end is connected with triode Q16 base stage, and triode Q16 emitter stage is divided into three tunnels, respectively with two poles The pipe D16 other end, resistance R37 one end, resistance R39 one end are connected, and the resistance R37 other end is divided into four tunnels, respectively with The resistance R39 other end, voltage-regulator diode Z13 one end, resistance R38 one end, G2 ports are connected, the resistance R38 other end Be divided into four tunnels, respectively with E2 ports, the voltage-regulator diode Z13 other end, triode Q16 colelctor electrode, No. 8 of transformer TR3 Port is connected, and transformer TR3 No. 5 ports are divided into four tunnels, respectively the colelctor electrode with triode Q23, the one of voltage-regulator diode Z14 End, resistance R44 one end, DC- ports are connected, and the resistance R44 other end is divided into four tunnels, another with voltage-regulator diode Z14 respectively One end, resistance R42 one end, resistance R43 one end, G4 ports are connected, and the resistance R42 other end is divided into three tunnels, respectively with electricity The resistance R43 other end, triode Q23 emitter stage, diode D17 one end are connected, triode Q23 base stage and resistance R41 One end be connected, the resistance R41 other end is connected with resistance R40 one end, and the resistance R40 other end is divided into two-way, respectively with The diode D17 other end, transformer TR3 No. 6 ports are connected；Transformer TR3 No. 9 ports are divided into four tunnels, respectively with three Pole pipe Q24 colelctor electrode, voltage-regulator diode Z15 one end, resistance R49 one end, DC- ports are connected, the resistance R49 other end It is divided into four tunnels, the other end with voltage-regulator diode Z15, resistance R47 one end, resistance R48 one end, G3 ports are connected respectively, The resistance R47 other end is divided into three tunnels, respectively the other end with resistance R48, triode Q24 emitter stage, the one of diode D18 End is connected, and triode Q24 base stage is connected with resistance R46 one end, and the resistance R46 other end is connected with resistance R45 one end, The resistance R45 other end is divided into two-way, and the other end with diode D18, transformer TR3 No. 10 ports are connected respectively.

The magnetic valve and high frequency control circuit are as follows：Chip U4 COMP ports are connected with diode D20 one end, and two The pole pipe D20 other end is divided into two-way, and one end with HF ports, electric capacity C29 is connected respectively, electric capacity C29 other end ground connection, core Piece U4 VFB ports ground connection, chip U4 VCC ports are divided into two-way, and one end with+15V power supplys, electric capacity C30 is connected respectively, electricity Hold C30 other end ground connection, chip U4 GUN ports ground connection, chip U4 RT/CT ports are divided into two-way, respectively with electric capacity C31 One end, resistance R52 one end be connected, the resistance R52 other end is connected with chip U4 VREF ports, and electric capacity C31's is another End be divided into two-way, one end with electric capacity C32, ground are connected respectively, and the electric capacity C32 other end is divided into two-way, respectively with chip U4 ISENSE ports, resistance R53 one end be connected, the resistance R53 other end is divided into two-way, respectively with FET T4 source Pole, resistance R54 one end are connected, and resistance R54 other end ground connection, FET T4 gate pole is connected with resistance R51 one end, The resistance R51 other end is connected with chip Y4 OUT ports, FET T4 drain electrode and transformer T13 No. 1 port It is connected, transformer T13 No. 2 ports are divided into two-way, and one end with electric capacity C36, electric capacity C35 one end are connected respectively, electric capacity C35 The other end be divided into two-way, the other end with electric capacity C36, ground are connected respectively, and transformer T13 No. 3 ports are divided into three tunnels, point No. 2 ports, electric capacity C33 one end, electric capacity C34 one end not with port G2 are connected, and the electric capacity C34 other end is divided into two-way, No. 1 port with port J8, the electric capacity C33 other end are connected respectively, port J8 No. 2 ports be divided into two-way respectively with port G2 No. 1 port, transformer T13 HV ports are connected.

The draught fan control circuit is as follows：No. 1 port of blower fan is divided into two-way, respectively with+24V power supplys, diode D19 One end is connected, and the diode D19 other end is divided into two-way, and No. 2 ports with blower fan, triode Q7 colelctor electrode are connected respectively, Triode Q7 grounded emitter, triode Q7 base stage are connected with resistance R50 one end, resistance the R50 other end and mainboard VALVE ports be connected.

The booster circuit is as follows：Chip U13 VFB ports are connected with electric capacity C87 one end, the electric capacity C87 other end It is divided into two-way, the COMP ports with chip U13, triode Q20 colelctor electrode are connected respectively, triode Q20 grounded emitter, Triode Q20 base stage is divided into two-way, and the colelctor electrode with triode Q21, resistance R24 one end are connected respectively, and resistance R24's is another One end is connected with chip U13 VREF ports, and triode Q21 grounded emitter, triode Q21 base stage is divided into two-way, point One end, resistance R26 one end not with resistance R25 are connected, and resistance R26 other end ground connection, the resistance R25 other end is divided into two One end with electric capacity C78, FZYH ports are connected respectively on road, and electric capacity C78 other end ground connection, chip U13 RT/CT ports are divided into Two-way, respectively one end with resistance R79, electric capacity C84 one end be connected, electric capacity C84 other end ground connection, resistance R79's is another End is divided into two-way, and one end with electric capacity C80, chip U13 VREF ports are connected respectively, electric capacity C80 other end ground connection, chip U13 ISNS ports are divided into two-way, and one end with resistance R89, electric capacity C85 one end are connected respectively, the resistance R89 other end point For two-way, one end with resistance R77, FET T10 source electrode are connected respectively, and the electric capacity C85 other end is divided into six tunnels, respectively GND ports, ground, the resistance R77 other end, electric capacity C79 one end, resistance R90 one end, electric capacity C83 with chip U13 One end is connected, and the electric capacity C83 other end is divided into three tunnels, respectively one end with resistance R64, diode D52 one end, diode D53 one end is connected, and the diode D53 other end is connected with resistance R78 one end, resistance the R78 other end and VOUT ports Be connected, the resistance R64 other end is connected with resistance R91 one end, and the resistance R91 other end is divided into two-way, respectively with resistance R90 The other end, the electric capacity C79 other end be connected, the diode D52 other end is divided into two-way, respectively with the one of high-frequency inductor L2 End, FET T10 drain electrode are connected, and the high-frequency inductor L2 other end is connected with diode D54, FET T10 door Pole is connected with resistance R113 one end, and the resistance R113 other end is connected with chip U13 OUT terminal mouth, chip U13 VCC ends Mouth is connected with+15V power supplys.

The control circuit is as follows：Control chip U3 SHDN ports are divided into four tunnels, respectively one end with resistance R8, resistance R5 one end, resistance R106 one end, electric capacity C3 one end are connected, and the resistance R8 other end is connected with CT ports, resistance R5's The other end is divided into two-way, and one end with electric capacity C3, ground are connected respectively, the resistance R106 other end with No. 8 of amplifier U10C Port is connected, and amplifier U10C No. 9 ports are divided into three tunnels, respectively one end with electric capacity C67, resistance R50 one end, resistance R49 one end is connected, and the resistance R50 other end is connected with+14V power supplys, and resistance R49 other end ground connection, electric capacity C67's is another End ground connection, amplifier U10C No. 10 ports are divided into three tunnels, respectively one end with resistance R100, resistance R99 one end, electric capacity C69 one end is connected, and the resistance R99 other end is connected with VREF ports, the resistance R100 other end be divided into two-way respectively with electricity Resistance R101 one end, electric capacity C68 one end is connected, and the resistance R101 other end is divided into three tunnels, another with electric capacity C68 respectively End, ground, the electric capacity C69 other end are connected, and control chip U3 COMP ports are connected with control chip U3 ERA- ports, control Coremaking piece U3 ERA+ ports are divided into four tunnels, respectively the transmitting of one end with electric capacity C12, electric capacity C42 one end, triode Q9 End, resistance R109 one end are connected, electric capacity C12 other end ground connection, the electric capacity C42 other end and FET T13 electric leakage Extremely it is connected, FET T13 source ground, FET T13 gate pole is connected with TIG1/MMA0 ports, resistance R109's The other end is divided into two-way, and one end with electric capacity C18, amplifier U6A No. 1 port are connected respectively, electric capacity the C18 other end and electricity Resistance R107 one end is connected, and amplifier U6A No. 2 ports are divided into two-way, respectively the other end with resistance R107, resistance R32 One end is connected, and the resistance R32 other end is divided into three tunnels, respectively one end with resistance R35, electric capacity C32 one end, diode D24 One end be connected, resistance R35 other end ground connection, electric capacity C32 other end ground connection, diode the D24 other end and CT ports It is connected, amplifier U6A No. 3 ports are divided into four tunnels, respectively one end with electric capacity C58, resistance R36 one end, resistance R108 One end, resistance R98 one end are connected, and electric capacity C58 other end ground connection, the resistance R108 other end is connected with VREF ports, electricity The resistance R98 other end is connected with diode D26 one end, and the resistance D26 other end is connected with 380-0/220-1 ports, resistance The R36 other end is divided into two-way, and the colelctor electrode with triode Q3, swept resistance VR2 sliding end are connected respectively, swept resistance VR2 one end is connected with swept resistance VR3 sliding end, swept resistance VR2 other end ground connection, swept resistance VR3 one end It is divided into two-way, one end with resistance R94, FET T15 source electrode are connected respectively, swept resistance VR3 other end ground connection, electricity The resistance R94 other end is connected with VREF ports, and FET T15 drain electrode is connected with VREF ports, FET T15 door Pole is divided into three tunnels, and one end with electric capacity C39, resistance R96 one end, resistance R93 one end are connected respectively, and electric capacity C39's is another End is divided into two-way, and the other end with ground, resistance R96 is connected respectively, the resistance R93 other end and No. 2 ends of mainboard J3 ports Mouth is connected, and No. 1 port of mainboard J3 ports is divided into two-way, and one end with electric capacity C66, resistance R97 one end are connected respectively, electric capacity C66 other end ground connection, the resistance R97 other end are connected with SHDN ports, No. 3 ports and the HF ports phase of mainboard J3 ports Even, No. 4 ports of mainboard J3 ports are connected with electric capacity C70 one end, electric capacity C70 other end ground connection, No. 5 of mainboard J3 ports Port is connected with GND ports, No. 6 ports ground connection of mainboard J3 ports, the grounded emitter of the triode Q3, triode Q3's Base stage is divided into two-way, and one end with resistance R31, resistance R19 one end are connected respectively, resistance R31 other end ground connection, resistance The R19 other end is connected with light emitting diode D7 one end, and the light emitting diode D7 other end is divided into two-way, respectively with resistance R11 one end, amplifier U11B No. 7 ports are connected, and amplifier U11B No. 5 ports are divided into three tunnels, respectively with resistance R13's One end, the resistance R11 other end, resistance R3 one end are connected, and resistance R13 other end ground connection, the resistance R3 other end is divided into Two-way, respectively one end with VREF ports, resistance R10 be connected, amplifier U11B No. 6 ports are divided into three tunnels, respectively with resistance The R10 other end, electric capacity C25 one end, No. 1 port of mainboard OT1 ports are connected, electric capacity C25 other end ground connection, mainboard No. 2 ports ground connection of OT1 ports；Control chip U3 GND ports ground connection, control chip U3 VC ports and+14V power supply phases Even, control chip U3 VREF ports are divided into four tunnels, respectively one end with resistance R89, resistance R91 one end, resistance R143 One end, electric capacity C2 one end are connected, and the electric capacity C2 other end is divided into three tunnels, respectively with electric capacity C45 one end, ground, resistance R142 one end is connected, and the resistance R142 other end is divided into three tunnels, respectively with SS ports, the electric capacity C45 other end, resistance R143 The other end be connected, the resistance R89 other end is divided into three tunnels, respectively the colelctor electrode with triode Q8, electric capacity C65 one end, three Pole pipe Q9 base stage is connected, and the electric capacity C65 other end is divided into two-way, and the colelctor electrode with triode Q9, ground are connected respectively, resistance The R91 other end is connected with triode Q8 base stage, and triode Q8 emitter stage is connected with FET T16 drain electrode, field Effect pipe T16 source ground, FET T16 gate pole are connected with TIG1/MMA0 ports, control chip U3 VIN ports It is divided into four tunnels, one end with resistance R103, electric capacity C71 one end, electric capacity C72 one end, electric capacity C5 one end are connected respectively, electricity Hold C5 the other end ground connection, electric capacity C71 the other end ground connection, electric capacity C72 the other end ground connection, the resistance R103 other end with+ 14V power supplys are connected, and control chip U3 CS/SS ports are connected with SS ports, control chip U3 AOUT ports and PWM-A ports Be connected, control chip U3 BOUT ports are connected with PWM-B ports, and control chip U3 CT ports are divided into two-way, respectively with electricity Hold C9 one end, triode Q2 base stage is connected, electric capacity C9 other end ground connection, triode Q2 colelctor electrode and VREF ports phase Even, triode Q2 emitter stage is connected with resistance R86 one end, and control chip U3 CS+ ports are divided into three tunnels, respectively with resistance R88 one end, the resistance R86 other end, resistance R7 one end are connected, resistance R88 other end ground connection, the resistance R7 other end It is divided into two-way, one end with resistance R95, electric capacity C36 one end are connected respectively, electric capacity C36 other end ground connection, resistance R95's The other end is connected with CT ports, and CT ports are also divided into six tunnels, respectively one end with resistance R90, resistance R53 one end, resistance R37 One end, resistance R55 one end, diode D8 one end, diode D9 one end be connected, resistance the R90 other end and field are imitated Should pipe T14 drain electrode be connected, FET T14 gate pole is connected with TIG1/MMA0 ports, and FET T14 source electrode connects Ground, the diode D9 other end are divided into two-way, and No. 1 port with mainboard CT1 ports, diode D10 one end are connected respectively, and two The pole pipe D8 other end is divided into two-way, and one end with diode D11, No. 2 ports of mainboard CT1 ports are connected respectively, resistance R37 The other end be divided into four tunnels, respectively the other end with resistance R55, the diode D11 other end, diode D10 the other end, Face is connected, and control chip U3 CS- ports ground connection, control chip U3 RT ports are divided into two-way, respectively with the one of resistance R105 End, resistance R87 one end are connected, resistance R87 other end ground connection, the resistance R105 other end and FET T4 drain electrode It is connected, FET T4 gate pole is connected with FTJ ports, FET T4 source ground.

The utility model compared with prior art, can be directed to different input current grades and load duration curve is made Adjustment, main operation are exactly the parameter for a small amount of component for changing circuit board top, it is possible to achieve different arcing time factors.Change The gauge size of radiator, IGBT model specifications and thermal sensitive parameter can be changed by becoming arcing time factor.Simultaneously using different fast extensive Multiple diode and transformer, output reactance can change the characteristic of welding machine, support 220V and 380V dual-supply voltages to input, The inverter type welder of a variety of welding application methods, solves the limitation of single power supply power supply, while possess manual welding and argon arc welding Two kinds of functions, improve the adaptability of welding machine, thus than single power supply and simple function welding machine have more preferable practicality with And selling market.The utility model welding machine internal circuit design has very unique place, while the structure design optimized is also One of emphasis of the present utility model, so not only increases the practicality of welding machine, while also reduces production cost, adds weldering The reliability and cost performance of machine.

Brief description of the drawings：

Fig. 1 is Structure explosion diagram of the present utility model；

Fig. 2 is main circuit schematic diagram of the present utility model；

Fig. 3 is 220V and 380V voltage conversion circuits schematic diagram of the present utility model；

Fig. 4 is switching power circuit schematic diagram of the present utility model；

Fig. 5 is IGBT drive controls circuit theory diagrams of the present utility model；

Fig. 6 is magnetic valve of the present utility model and high frequency control circuit schematic diagram；

Fig. 7 is fan circuit figure of the present utility model；

Fig. 8 is booster circuit schematic diagram of the present utility model；

Fig. 9 ~ 11 are control circuit schematic diagrams of the present utility model.

Embodiment：

The utility model is described further with reference to accompanying drawing.

Referring to Fig. 1, the utility model devises 220V and 380V dual power supply IGBT inverter argon arc welding machines, including cabinet, wind Machine, mainboard, control panel, it is characterised in that：Chassis backplane（13）Four base angles of outer surface are respectively fixed with under-chassis（17）, cabinet Rear board（7）Outside be provided with radiator one（23）, radiator one（23）Top be provided with fan shroud（24）, fan shroud（24） Both sides be provided with rectifier bridge（25）, fan shroud（24）Top be provided with input power cord（26）, input power cord（26）Side Provided with input switch（27）, cabinet rear board（7）Inner side be provided with blower fan（14）And magnetic valve（28）, blower fan（14）Rear set There is radiator two（16）, radiator two（16）Side be provided with radiator three（19）, radiator three（19）Lower section be provided with IGBT Module（18）, radiator three（19）Side and support column（20）It is connected, radiator two（16）Rear be provided with mainboard（21）, it is main Plate（21）It is provided with fast recovery diode（15）, high-frequency inductor（12）, transformer（22）, mainboard（21）With control panel（3）It is connected, Control panel（3）Positioned at mainboard（21）With case front panel（4）Between, control panel（3）Lower section be provided with copper bar（11）, copper bar（11） On be connected with young waiter in a wineshop or an inn's core mounting seat（10）, case front panel（4）It is provided with change-over switch（5）, knob（6）, plug-assembly（8）、 Two core aviation sockets（9）, cabinet（2）Top be provided with handle（1）.

Referring to Fig. 2 ~ 9, the utility model devises the circuit of 220V and 380V dual power supply IGBT inverter argon arc welding machines, bag Include：Main control circuit, 220V and 380V voltage conversion circuits, switching power circuit, IGBT drive controls circuit, magnetic valve and height Frequency control circuit, draught fan control circuit, booster circuit, control circuit, it is characterised in that：Main control circuit is as follows：Rectifier bridge BR No. 1 port be divided into two-way, one end with AC1 ports, electric capacity C1 is connected respectively, and the electric capacity C1 other end is divided into two-way, respectively With AC2 ports, rectifier bridge BR No. 3 ports, rectifier bridge BR No. 2 ports are divided into seven tunnels, respectively one end with electric capacity C4, electric capacity C5 one end, resistance R2 one end, electric capacity C7 one end, IGBT pipes Q2 emitter stage, IGBT pipes Q4 emitter stage, DC- ports It is connected, the electric capacity C7 other end is divided into seven tunnels, respectively one end with electric capacity C2, the electric capacity C5 other end, electric capacity C3 one end, electricity The resistance R2 other end, resistance R1 one end, the electric capacity C7 other end, electric capacity C6 one end are connected, rectifier bridge BR No. 4 ports point For two-way, one end with thermistor RT, relay J1 one end are connected respectively, and the relay J1 other end is divided into eight tunnels, point The other end, the electric capacity C2 other end, the electric capacity C3 other end, the resistance R1 other end, electric capacity C6 not with thermistor RT The other end, IGBT pipes Q1 current collection end, IGBT pipes Q3 current collection end, DC+ ports are connected, and IGBT pipes Q1 transmitting terminal is divided into three Road, respectively No. 3 ports with e1 port, IGBT pipes Q2 current collection end, relay J2 be connected, IGBT pipes Q1 base stage and G1 ports It is connected, IGBT pipes Q2 base stage is connected with G3 ports, and IGBT pipes Q3 transmitting terminal is divided into three tunnels, is managed respectively with E2 ports, IGBT Q4 current collection end, transformer T1 No. 2 ports are connected, and IGBT pipes Q3 base stage is connected with G2 ports, IGBT pipes Q4 base stage with G4 is connected；No. 4 ports of the relay J2 are divided into two-way, respectively No. 1 port with transformer T2, transformer T2 No. 4 ends Mouth is connected, and relay J2 No. 5 ports are connected with transformer T2 No. 3 ports, No. 1 port of the transformer T1 and transformer T2 No. 2 ports are connected, and transformer T1 No. 3 ports are connected with CT No. 2 ports, transformer T1 No. 4 ports and No. 1 of CT Port is connected, and transformer T2 No. 5 ports are divided into four tunnels, respectively one end with diode D2 ', diode D1 ' one end, two poles Pipe D1 one end, resistance R3 one end is connected, and the resistance R3 other end is connected with resistance R4 one end, the resistance R4 other end with Electric capacity C8 one end is connected, and the electric capacity C8 other end is divided into eight tunnels, respectively the other end with diode D1 ', diode D1 it is another One end, the diode D2 ' other end, diode D2 one end, diode D3 one end, diode D3 ' one end, electric capacity C9 One end, VOUT+ ports are connected, and transformer T2 No. 6 ports are divided into two classes, respectively with transformer T2 No. 7 ports, VOUT- ends Mouth is connected, and transformer T2 No. 8 ports are divided into four tunnels, respectively the other end with diode D2, the diode D3 ' other end, two The pole pipe D3 other end, resistance R5 one end are connected, and the resistance R5 other end is connected with resistance R6 one end, and resistance R6's is another End is connected with the electric capacity C9 other end.

220V and 380V voltage conversion circuits are as follows in the utility model：DC+ ports and voltage-regulator diode Z1 one end phase Even, the voltage-regulator diode Z1 other end is connected with voltage-regulator diode Z2 one end, voltage-regulator diode the Z2 other end and resistance R7 One end be connected, the resistance R7 other end is divided into two-way, respectively No. 1 port with photoelectrical coupler U1A, resistance R8 one end phase Even, the resistance R8 other end is divided into two-way, and No. 2 ports with DC- ports, photoelectrical coupler U1A are connected respectively, photoelectrical coupler U1A No. 3 ports are divided into four tunnels, respectively the colelctor electrode with triode Q22, resistance R11 one end, ground, electric capacity C10 one end It is connected, photoelectrical coupler U1A No. 4 ports are divided into two-way, and one end with resistance R9, triode Q22 base stage are connected respectively, electricity The resistance R9 other end is divided into two-way, and one end with+15V power supplys, resistance R10 is connected respectively, and the resistance R10 other end is divided into four No. 12 ends on road, the respectively emitter stage with triode Q22, the resistance R11 other end, the electric capacity C10 other end, amplifier U1D Mouth is connected, and amplifier U1D No. 11 ports are connected with 5V power supplys, amplifier U1D No. 14 ports and FET T3 gate pole Be connected, FET T3 source ground, FET T3 drain electrode is divided into four tunnels, respectively one end with diode D4, after Electrical equipment J7 No. 2 ports, amplifier U17C No. 9 ports, electric capacity C11 one end are connected, diode the D4 other end and relay Device J7 No. 1 port is connected, and relay J7 No. 3 ports are connected with e1 port, and relay J7 No. 4 ports are divided into two-way, point No. 4 ports of No. 1 port, transformer T2 not with transformer T2 are connected, relay J7 No. 5 ports with No. 3 of transformer T2 Port is connected, and transformer T2 No. 2 ports are connected with E2 ports, and the electric capacity C11 other end is divided into six tunnels, respectively with resistance R12 One end, resistance R13 one end, electric capacity C12 one end, voltage-regulator diode Z5 one end, amplifier U14A No. 3 ports, put Big device U16B No. 6 ports are connected, and the resistance R12 other end is connected with+15V power supplys, and the resistance R13 other end is divided into three tunnels, The other end with electric capacity C12, ground, the voltage-regulator diode Z5 other end are connected respectively, and amplifier U17C No. 10 ports are divided into Five tunnels, respectively No. 4 ports with amplifier U16B, resistance R14 one end, resistance R15 one end, electric capacity C13 one end, electric capacity C14 one end is connected, and the resistance R14 other end is divided into two-way, and the other end with ground, electric capacity C13 is connected respectively, electric capacity C14 The other end be divided into three tunnels, the other end with resistance R15, resistance R16 one end, amplifier U14A No. 2 ports are connected respectively, The resistance R16 other end is connected with+15V power supplys, and amplifier U14A No. 1 port is connected with diode D5 one end, diode The D5 other end is divided into two-way, and one end with diode D6, SHDN ports are connected respectively, diode the D6 other end and amplifier U16B No. 7 ports are connected, and amplifier U17C No. 8 ports are connected with diode D7 one end, the diode D7 other end with 380-0/220-1 ports are connected.

Switching power circuit is as follows in the utility model：Power supply chip U7 VFB ports are connected with electric capacity C17 one end, The electric capacity C17 other end is divided into three tunnels, respectively the COMP ports with power supply chip U7, photoelectrical coupler U2B No. 3 ports, electricity Resistance R19 one end is connected, and resistance R19 other end ground connection, photoelectrical coupler U2B No. 4 ports are connected with VREF ports, power supply Chip U7 RT/CT ports are divided into two-way, and one end with resistance R17, electric capacity C15 one end are connected respectively, and electric capacity C15's is another End ground connection, the resistance R17 other end are connected with power supply chip U7 VREF ports, and the ISNS ports of power supply chip are divided into two-way, One end with resistance R18, electric capacity C16 one end are connected respectively, electric capacity C16 other end ground connection, the resistance R18 other end with CFB ports are connected, and power supply chip U7 GND ports ground connection, power supply chip U7 OUT terminal mouth is connected with resistance R20 one end, electricity Resistance R20 the other end be connected with FET T11 gate pole, FET T11 source electrode is divided into two-way, respectively with resistance R21 One end, CFB ports be connected, resistance R21 other end ground connection, FET T11 drain electrode is divided into two-way, respectively with two poles Pipe D9 one end, transformer T12 No. 10 ports are connected, and the diode D9 other end is divided into two-way, respectively with the one of electric capacity C19 End, resistance R22 one end are connected, and the resistance R22 other end is divided into three tunnels, respectively the other end with electric capacity C19, vdd terminal mouth, change Depressor T12 No. 12 ports are connected, and transformer T12 No. 7 ports are connected with diode D8 one end, the diode D8 other end It is divided into three tunnels, one end with power supply chip U7 VCC ports, electric capacity C18 one end, electric capacity C20 is connected respectively, electric capacity C18's The other end is divided into three tunnels, and No. 8 ports with ground, the electric capacity C20 other end, transformer T12 are connected respectively, and the 1 of transformer T12 Number port is connected with diode D11 one end, and the diode D11 other end is divided into four tunnels, respectively one end with electric capacity C23, electricity Appearance C24 one end, diode D12 one end ,+15V power supplys are connected, the diode D12 other end and diode D13 one end phase Even, the diode D13 other end is connected with diode D14 one end, and the diode D14 other end is connected with+12V power supplys, electricity The other end for holding C24 is divided into six tunnels, respectively with ground, the electric capacity C23 other end, transformer T12 No. 3 ports, electric capacity C22 One end, electric capacity C21 one end, transformer T12 No. 5 ports are connected, and the electric capacity C22 other end is divided into three tunnels, respectively with electric capacity The C21 other end ,+24V power supplys, diode D10 one end are connected, the diode D10 other end and transformer T12 No. 6 ends Mouth is connected；No. 1 port of the photoelectrical coupler U2B is connected with resistance R24 one end, resistance the R24 other end and resistance R23 One end be connected, the resistance R23 other end is divided into two-way, respectively No. 2 ports with photoelectrical coupler U2B, voltage-regulator diode Z6 One end be connected, the voltage-regulator diode Z6 other end is connected with voltage-regulator diode Z7 one end, the voltage-regulator diode Z7 other end Ground connection.

The circuits of IGBT drive controls described in the utility model are as follows：PWM-A ports are divided into four tunnels, respectively with electric capacity C25 One end, resistance R25 one end, resistance R26 one end, electric capacity C26 one end be connected, the electric capacity C25 other end is divided into two-way, The other end with resistance R25, voltage-regulator diode Z8 one end are connected respectively, voltage-regulator diode the Z8 other end and triode Q11 Base stage be connected, triode Q11 emitter stage is divided into two-way, respectively one end with resistance R29, triode Q25 emitter stage phase Even, the resistance R29 other end is connected with+15V power supplys, and the electric capacity C26 other end is divided into two-way, another with resistance R26 respectively End, voltage-regulator diode Z11 one end are connected, and the voltage-regulator diode Z11 other end is connected with triode Q26 base stage, triode Q26 colelctor electrode is divided into two-way, and the colelctor electrode with triode Q11, transformer TR3 No. 1 port are connected respectively, triode Q26 Grounded emitter, PWM-B ports are divided into four tunnels, respectively one end with electric capacity C27, resistance R27 one end, the one of resistance R28 End, electric capacity C28 one end are connected, and the electric capacity C27 other end is divided into two-way, respectively the other end with resistance R27, voltage-regulator diode Z9 one end is connected, and the voltage-regulator diode Z9 other end is connected with triode Q25 base stage, and the electric capacity C28 other end is divided into two Road, respectively the other end with resistance R28, voltage-regulator diode Z10 one end be connected, the voltage-regulator diode Z10 other end and three poles Pipe Q27 base stage is connected, triode Q27 colelctor electrode is divided into two-way, respectively the colelctor electrode with triode Q25, transformer TR3 No. 2 ports are connected, triode Q27 grounded emitter, and transformer TR3 No. 3 ports are divided into two-way, respectively with diode D15 One end, resistance R30 one end is connected, and the resistance R30 other end is connected with resistance R31 one end, the resistance R31 other end with Triode Q28 base stage is connected, and triode Q28 emitter stage is divided into three tunnels, respectively the other end with diode D15, resistance R32 One end, resistance R33 one end be connected, the resistance R32 other end is divided into four tunnels, respectively the other end with resistance R33, voltage stabilizing two Pole pipe Z12 one end, one end of resistance R34, G1 ports are connected, and the other end of resistance R34 is divided into four tunnels, respectively with e1 port, The voltage-regulator diode Z12 other end, triode Q28 colelctor electrode, transformer TR3 No. 4 ports are connected, No. 7 of transformer TR3 Port is divided into two-way, is connected respectively with diode D16 one end, resistance R35 one end, resistance the R35 other end and resistance R36 One end be connected, the resistance R36 other end is connected with triode Q16 base stage, and triode Q16 emitter stage is divided into three tunnels, point One end, resistance R39 one end of the other end, resistance R37 not with diode D16 are connected, and the resistance R37 other end is divided into four Road, respectively the other end with resistance R39, voltage-regulator diode Z13 one end, resistance R38 one end, G2 ports be connected, resistance R38 The other end be divided into four tunnels, respectively with E2 ports, the voltage-regulator diode Z13 other end, triode Q16 colelctor electrode, transformer TR3 No. 8 ports are connected, and transformer TR3 No. 5 ports are divided into four tunnels, respectively the colelctor electrode with triode Q23, the pole of voltage stabilizing two Pipe Z14 one end, resistance R44 one end, DC- ports are connected, and the resistance R44 other end is divided into four tunnels, respectively with the pole of voltage stabilizing two The pipe Z14 other end, resistance R42 one end, resistance R43 one end, G4 ports are connected, and the resistance R42 other end is divided into three tunnels, The other end with resistance R43, triode Q23 emitter stage, diode D17 one end are connected respectively, triode Q23 base stage with Resistance R41 one end is connected, and the resistance R41 other end is connected with resistance R40 one end, and the resistance R40 other end is divided into two-way, The other end with diode D17, transformer TR3 No. 6 ports are connected respectively；Transformer TR3 No. 9 ports are divided into four tunnels, point Colelctor electrode, voltage-regulator diode Z15 one end, resistance R49 one end not with triode Q24, DC- ports are connected, resistance R49's The other end is divided into four tunnels, respectively the other end with voltage-regulator diode Z15, resistance R47 one end, resistance R48 one end, G3 ports It is connected, the resistance R47 other end is divided into three tunnels, respectively the other end with resistance R48, triode Q24 emitter stage, diode D18 one end is connected, and triode Q24 base stage is connected with resistance R46 one end, the resistance R46 other end and the one of resistance R45 End is connected, and the resistance R45 other end is divided into two-way, respectively the other end with diode D18, transformer TR3 No. 10 port phases Even.

Magnetic valve and high frequency control circuit are as follows in the utility model：Chip U4 COMP ports and the one of diode D20 End is connected, and the diode D20 other end is divided into two-way, and one end with HF ports, electric capacity C29 is connected respectively, and electric capacity C29's is another End ground connection, chip U4 VFB ports ground connection, chip U4 VCC ports are divided into two-way, respectively with+15V power supplys, electric capacity C30 one End is connected, electric capacity C30 other end ground connection, chip U4 GUN ports ground connection, and chip U4 RT/CT ports are divided into two-way, respectively One end, resistance R52 one end with electric capacity C31 are connected, and the resistance R52 other end is connected with chip U4 VREF ports, electric capacity The C31 other end is divided into two-way, and one end with electric capacity C32, ground are connected respectively, and the electric capacity C32 other end is divided into two-way, respectively One end of ISENSE ports, resistance R53 with chip U4 is connected, and the resistance R53 other end is divided into two-way, respectively with FET T4 source electrode, resistance R54 one end are connected, resistance R54 other end ground connection, FET T4 gate pole and the one of resistance R51 End is connected, and the resistance R51 other end is connected with chip Y4 OUT ports, FET T4 drain electrode and the 1 of transformer T13 Number port is connected, and transformer T13 No. 2 ports are divided into two-way, and one end with electric capacity C36, electric capacity C35 one end are connected respectively, The electric capacity C35 other end is divided into two-way, and the other end with electric capacity C36, ground are connected respectively, and transformer T13 No. 3 ports are divided into Three tunnels, respectively No. 2 ports with port G2, electric capacity C33 one end, electric capacity C34 one end be connected, the electric capacity C34 other end point For two-way, No. 1 port with port J8, the electric capacity C33 other end are connected respectively, and port J8 No. 2 ports are divided into two-way difference The HV ports of No. 1 port, transformer T13 with port G2 are connected.

Draught fan control circuit is as follows in the utility model：No. 1 port of blower fan is divided into two-way, respectively with+24V power supplys, two Pole pipe D19 one end is connected, and the diode D19 other end is divided into two-way, respectively No. 2 ports with blower fan, triode Q7 collection Electrode is connected, triode Q7 grounded emitter, and triode Q7 base stage is connected with resistance R50 one end, and resistance R50's is another End is connected with the VALVE ports of mainboard.

Booster circuit is as follows in the utility model：Chip U13 VFB ports are connected with electric capacity C87 one end, electric capacity C87 The other end be divided into two-way, the COMP ports with chip U13, triode Q20 colelctor electrode are connected respectively, triode Q20 hair Emitter grounding, triode Q20 base stage are divided into two-way, and the colelctor electrode with triode Q21, resistance R24 one end are connected respectively, electricity The resistance R24 other end is connected with chip U13 VREF ports, triode Q21 grounded emitter, triode Q21 base stage point For two-way, one end with resistance R25, resistance R26 one end are connected respectively, and resistance R26 other end ground connection, resistance R25's is another One end is divided into one end, FZYH port of the two-way respectively with electric capacity C78 and is connected, electric capacity C78 other end ground connection, chip U13 RT/ CT ports are divided into two-way, and one end with resistance R79, electric capacity C84 one end are connected respectively, electric capacity C84 other end ground connection, resistance The R79 other end is divided into two-way, and one end with electric capacity C80, chip U13 VREF ports are connected respectively, the electric capacity C80 other end Ground connection, chip U13 ISNS ports are divided into two-way, and one end with resistance R89, electric capacity C85 one end are connected respectively, resistance R89 The other end be divided into two-way, one end with resistance R77, FET T10 source electrode are connected respectively, the electric capacity C85 other end point For six tunnels, the GND ports with chip U13, ground, the resistance R77 other end, electric capacity C79 one end, the one of resistance R90 respectively End, electric capacity C83 one end are connected, and the electric capacity C83 other end is divided into three tunnels, respectively one end with resistance R64, diode D52 One end, diode D53 one end are connected, and the diode D53 other end is connected with resistance R78 one end, the resistance R78 other end It is connected with VOUT ports, the resistance R64 other end is connected with resistance R91 one end, and the resistance R91 other end is divided into two-way, point The other end, the electric capacity C79 other end not with resistance R90 are connected, and the diode D52 other end is divided into two-way, respectively with high frequency Inductance L2 one end, FET T10 drain electrode are connected, and the high-frequency inductor L2 other end is connected with diode D54, field-effect Pipe T10 gate pole is connected with resistance R113 one end, and the resistance R113 other end is connected with chip U13 OUT terminal mouth, chip U13 VCC ports are connected with+15V power supplys.

Control circuit is as follows in the utility model：Control chip U3 SHDN ports are divided into four tunnels, respectively with resistance R8's One end, resistance R5 one end, resistance R106 one end, electric capacity C3 one end are connected, and the resistance R8 other end is connected with CT ports, The resistance R5 other end is divided into two-way, and one end with electric capacity C3, ground are connected respectively, resistance the R106 other end and amplifier U10C No. 8 ports are connected, and amplifier U10C No. 9 ports are divided into three tunnels, respectively one end with electric capacity C67, the one of resistance R50 End, resistance R49 one end are connected, and the resistance R50 other end is connected with+14V power supplys, resistance R49 other end ground connection, electric capacity C67 other end ground connection, amplifier U10C No. 10 ports are divided into three tunnels, respectively one end with resistance R100, the one of resistance R99 End, electric capacity C69 one end are connected, and the resistance R99 other end is connected with VREF ports, and the resistance R100 other end is divided into two-way point One end, electric capacity C68 one end not with resistance R101 are connected, and the resistance R101 other end is divided into three tunnels, respectively with electric capacity C68's The other end, ground, the electric capacity C69 other end are connected, control chip U3 COMP ports and control chip U3 ERA- ports phase Even, control chip U3 ERA+ ports are divided into four tunnels, respectively one end with electric capacity C12, electric capacity C42 one end, triode Q9 Transmitting terminal, resistance R109 one end are connected, and electric capacity C12 other end ground connection, the electric capacity C42 other end is with FET T13's Drain electrode is connected, FET T13 source ground, and FET T13 gate pole is connected with TIG1/MMA0 ports, resistance The R109 other end is divided into two-way, and one end with electric capacity C18, amplifier U6A No. 1 port are connected respectively, and electric capacity C18's is another End is connected with resistance R107 one end, and amplifier U6A No. 2 ports are divided into two-way, respectively the other end with resistance R107, resistance R32 one end is connected, and the resistance R32 other end is divided into three tunnels, respectively one end with resistance R35, electric capacity C32 one end, two poles Pipe D24 one end is connected, resistance R35 other end ground connection, electric capacity C32 other end ground connection, diode the D24 other end and CT Port is connected, and amplifier U6A No. 3 ports are divided into four tunnels, respectively one end with electric capacity C58, resistance R36 one end, resistance R108 one end, resistance R98 one end is connected, electric capacity C58 other end ground connection, resistance the R108 other end and VREF ports phase Even, the resistance R98 other end is connected with diode D26 one end, and the resistance D26 other end is connected with 380-0/220-1 ports, The resistance R36 other end is divided into two-way, and the colelctor electrode with triode Q3, swept resistance VR2 sliding end are connected respectively, slides electricity Resistance VR2 one end is connected with swept resistance VR3 sliding end, swept resistance VR2 other end ground connection, and the one of swept resistance VR3 End is divided into two-way, and one end with resistance R94, FET T15 source electrode are connected respectively, swept resistance VR3 other end ground connection, The resistance R94 other end is connected with VREF ports, and FET T15 drain electrode is connected with VREF ports, FET T15's Gate pole is divided into three tunnels, and one end with electric capacity C39, resistance R96 one end, resistance R93 one end are connected respectively, and electric capacity C39's is another One end is divided into two-way, and the other end with ground, resistance R96 is connected respectively, the resistance R93 other end with No. 2 of mainboard J3 ports Port is connected, and No. 1 port of mainboard J3 ports is divided into two-way, and one end with electric capacity C66, resistance R97 one end are connected respectively, electricity Hold C66 other end ground connection, the resistance R97 other end is connected with SHDN ports, No. 3 ports and the HF ports phase of mainboard J3 ports Even, No. 4 ports of mainboard J3 ports are connected with electric capacity C70 one end, electric capacity C70 other end ground connection, No. 5 of mainboard J3 ports Port is connected with GND ports, No. 6 ports ground connection of mainboard J3 ports, the grounded emitter of the triode Q3, triode Q3's Base stage is divided into two-way, and one end with resistance R31, resistance R19 one end are connected respectively, resistance R31 other end ground connection, resistance The R19 other end is connected with light emitting diode D7 one end, and the light emitting diode D7 other end is divided into two-way, respectively with resistance R11 one end, amplifier U11B No. 7 ports are connected, and amplifier U11B No. 5 ports are divided into three tunnels, respectively with resistance R13's One end, the resistance R11 other end, resistance R3 one end are connected, and resistance R13 other end ground connection, the resistance R3 other end is divided into Two-way, respectively one end with VREF ports, resistance R10 be connected, amplifier U11B No. 6 ports are divided into three tunnels, respectively with resistance The R10 other end, electric capacity C25 one end, No. 1 port of mainboard OT1 ports are connected, electric capacity C25 other end ground connection, mainboard No. 2 ports ground connection of OT1 ports；Control chip U3 GND ports ground connection, control chip U3 VC ports and+14V power supply phases Even, control chip U3 VREF ports are divided into four tunnels, respectively one end with resistance R89, resistance R91 one end, resistance R143 One end, electric capacity C2 one end are connected, and the electric capacity C2 other end is divided into three tunnels, respectively with electric capacity C45 one end, ground, resistance R142 one end is connected, and the resistance R142 other end is divided into three tunnels, respectively with SS ports, the electric capacity C45 other end, resistance R143 The other end be connected, the resistance R89 other end is divided into three tunnels, respectively the colelctor electrode with triode Q8, electric capacity C65 one end, three Pole pipe Q9 base stage is connected, and the electric capacity C65 other end is divided into two-way, and the colelctor electrode with triode Q9, ground are connected respectively, resistance The R91 other end is connected with triode Q8 base stage, and triode Q8 emitter stage is connected with FET T16 drain electrode, field Effect pipe T16 source ground, FET T16 gate pole are connected with TIG1/MMA0 ports, control chip U3 VIN ports It is divided into four tunnels, one end with resistance R103, electric capacity C71 one end, electric capacity C72 one end, electric capacity C5 one end are connected respectively, electricity Hold C5 the other end ground connection, electric capacity C71 the other end ground connection, electric capacity C72 the other end ground connection, the resistance R103 other end with+ 14V power supplys are connected, and control chip U3 CS/SS ports are connected with SS ports, control chip U3 AOUT ports and PWM-A ports Be connected, control chip U3 BOUT ports are connected with PWM-B ports, and control chip U3 CT ports are divided into two-way, respectively with electricity Hold C9 one end, triode Q2 base stage is connected, electric capacity C9 other end ground connection, triode Q2 colelctor electrode and VREF ports phase Even, triode Q2 emitter stage is connected with resistance R86 one end, and control chip U3 CS+ ports are divided into three tunnels, respectively with resistance R88 one end, the resistance R86 other end, resistance R7 one end are connected, resistance R88 other end ground connection, the resistance R7 other end It is divided into two-way, one end with resistance R95, electric capacity C36 one end are connected respectively, electric capacity C36 other end ground connection, resistance R95's The other end is connected with CT ports, and CT ports are also divided into six tunnels, respectively one end with resistance R90, resistance R53 one end, resistance R37 One end, resistance R55 one end, diode D8 one end, diode D9 one end be connected, resistance the R90 other end and field are imitated Should pipe T14 drain electrode be connected, FET T14 gate pole is connected with TIG1/MMA0 ports, and FET T14 source electrode connects Ground, the diode D9 other end are divided into two-way, and No. 1 port with mainboard CT1 ports, diode D10 one end are connected respectively, and two The pole pipe D8 other end is divided into two-way, and one end with diode D11, No. 2 ports of mainboard CT1 ports are connected respectively, resistance R37 The other end be divided into four tunnels, respectively the other end with resistance R55, the diode D11 other end, diode D10 the other end, Face is connected, and control chip U3 CS- ports ground connection, control chip U3 RT ports are divided into two-way, respectively with the one of resistance R105 End, resistance R87 one end are connected, resistance R87 other end ground connection, the resistance R105 other end and FET T4 drain electrode It is connected, FET T4 gate pole is connected with FTJ ports, FET T4 source ground.

As shown in figure 1,220V and 380V dual power supplies IGBT inverter argon arc welding machines made of the utility model

Chief component includes：

1）Casing part includes handle 1, case 2, cabinet 13, front panel 4..

2）The part of front-facing portion installation mainly has：Control panel 3, manual welding argon arc welding method change-over switch 5, electricity Stream regulation potentiometer knob 6, after supply gas regulation potentiometer knob, European medium-sized fast male plug head assembly 8, European medium-sized fast mother socket Two set 7 of component, two core aviation sockets 9, young waiter in a wineshop or an inn's core mounting seat 10, negative pole connecting copper bar 11.Set on control panel stateful Indicator lamp, overtemperature protection warning lamp and current regulation potentiometer knob and after supply gas regulation potentiometer knob.Welding method turns Button is changed to be free to switch two kinds of welding manners of manual welding and argon arc welding.

3）The part of cabinet part installation mainly has：Under-chassis 17, input power cord 26, input power switch 27, ventilation electricity Magnet valve 28, cooling fan 14, blower fan guard 24 and ground connection mark.Input power cord is connected to above mainboard by way of welding, Fixed card buckle is installed on plate part power line below, corresponding with the groove of metal plate, placement is firmly excessive to cause power cord Fall.Fan shroud is arranged on outside metal plate, and the ribbon for preventing blower fan big when work sticks into blower fan.Cold wind is behind cabinet Air admission hole enter, can effectively remove machine inner heat component caused by heat, ensured machine normal work Reliability, improve the load duration curve of machine.AVSV Air Vent Solenoid Valve is arranged on above rear board metal plate, can be very good to utilize The space of welding machine, the volume of welding machine is laughed at.Cabinet is linked together by rear board and floor bending, and metal plate thickness is fitted Preferably, both reduced the difficulty of assembling, while also caused machine easedization, reduce cost do not influence but the structure of machine with And performance.Cabinet bottom is provided with four rubber under-chassis, facilitates the movement of machine.

4）Mainboard 21, including inverter main circuit, switching power circuit, 220V and 380V voltage conversion circuits, high-frequency arc strike Circuit, booster circuit, solenoid valve control circuit and IGBT drive circuit.Between each circuit, according to circuit of the present utility model Schematic diagram relation links together.The inside main control circuit of the utility model welding machine can meet each of manual welding and argon arc welding Item control requires.

5）Inverter main circuit includes：Soft starting circuit, input rectification circuit, filter circuit, times voltage conversion circuit and four Single tube IGBT, bridge arm electric capacity, inverter circuit main transformer 31 and output rectification fast recovery diode 15 etc..Described soft start Circuit is made up of a PTC thermistor, a relay and its contact.Described input rectification circuit is by a rectifier bridge 25 Composition.

Described filtered electrical routing resistance forms with electric capacity.Described output rectification circuit by several fast recovery diodes with And resistance, electric capacity composition.The part heating element of inverter main circuit all mixes the radiator of different model, can remove well Heat.

As shown in Figure 1, the utility model welding machine is connected in two groups of Europe soon when using manual welding method On female plug holder assembly 7.Fast mother socket corresponds to earth cable and welding clamp cable respectively in two groups of Europe.Can be according to not when connection Same welding manner selection both positive and negative polarity connection method.It can be selected according to welding rod difference to use direct current when using manual welding Just connecing or DC reverse connection, but with using straight polarity direct current when argon arc welding.Due to fast in the cable interface Europe of argon-arc welding gun Male plug and negative pole export to be linked together by being connected bronze medal, so avoiding the need for judging when in use positive and negative Connection., this method not only facilitates the design and assembling of machine construction, while has been also convenient for the operation of welding engineer.Preceding Fast mother socket is labeled with both positive and negative polarity in corresponding Europe on panel.Need to connect a young waiter in a wineshop or an inn's core aviation when using argon arc welding simultaneously Socket 9, correspond to the switch above welding gun.

The front panel of the utility model welding machine is installed above have current adjusting knob and after supply gas adjusting knob and welding Method choice switchs.The utility model welding machine possesses two kinds of bond patterns, is manual welding and argon arc welding respectively, and corresponding two kinds are welded The mode of connecing has different welding circuits, therefore switching welding circuit is needed when using different welding methods.Pass through hand Work weldering argon arc welding switching button be free to switch two kinds of bond patterns, corresponding two kinds of different welding circuits.Using weldering Status indicator lamp Chang Liang when machine, show the working condition of machine.When machine loading overlong time causes temperature to exceed maximum Machine enters overtemperature protection state when rated value, and at this time the Amber Alerts lamp on front panel is bright, and now machine is without output, In the blower fan state of cooling.When machine internal temperature is reduced to recovery point temperature, machine can normal use again.

The Thermal protection temperature acquisition point of the utility model welding machine is located on radiator 23.Thermistor is installed by screw On a heat sink.Thermistor mount point is close to single tube IGBT module, IGBT module when can be good at reflecting machine operation Temperature, to carry out overtemperature protection, it is ensured that machine is not in the problem of being burnt out because of overheat.

As shown in Figure 1, the utility model welding machine mainboard is installed above three module radiators.Inverter circuit above mainboard Part high-frequency element is relatively more, and caused heat is very big, and radiating serious mainly includes single tube IGBT module 18, input rectifying bridge 25th, the device such as fast recovery diode 15 and transformer is exported.Single tube IGBT module and input rectifying bridge are all arranged close to wind On the radiator 19,23 of machine, while thermal grease conduction increased thermal conductivity energy is coated with the common port of these devices.Two module radiators with Air channel is placed in parallel, and heat dispersion is good.Output fast recovery diode be also mounted on radiator 16, the radiator be placed on away from From cooling fan remote position, and perpendicular to air channel.Transformer and high-frequency inductor 12 are then between mainboard and case.When Cooling fan brings into operation when machine brings into operation, and cold wind enters from air admission hole, by being arrived after two pieces of IGBT radiators Fast recovery diode radiator, because this module radiator is disposed vertically, so cold wind is blocked herein, and by case therewith Form a circulation air path.Heating element can so in this section has preferably cold by cold front heavy rain twice But effect.This design not only saves space, while the most important radiating for being just the increase in machine in the structure of machine Performance, some heating elements are allow to work long hours in rated temperature without into guard mode.Pass through this air channel Design can improve the reliability that the cyclic duration factor of welding machine and welding machine use.

As shown in Figure 1, on the control board of the utility model welding machine plate forward-mounted.Control circuit includes multiple Module section, mainly have：Temperature-sensitive protection circuit, pwm control circuit, electric current, after supply gas regulation circuit, welding manner selection circuit Deng.All complete to install by the way of SMD components, by machine automatic chip mounting in control panel front.The component master at the back side There are the plug-in components such as indicator lamp and potentiometer knob, installed by way of human weld.Positive component installation Facilitate modification parameter and debugging afterwards, be the major part of control panel.The component at the back side is mainly on plate forward-mounted Face be used for operate and indicate used in.Positive component also includes part and inserts shell, is connected mainboard and control panel by connecting line Pick up and.Front is provided with adjustable potentiometer, for used in machine debugging.The maximum electricity of output can be adjusted by this potentiometer Stream.The potentiometer at the back side include current regulation potentiometer and after supply gas regulation potentiometer.Two potentiometers are with the side of knob On formula plate forward-mounted, the size of welding current can be adjusted by adjusting current level device when welding.After supply gas Regulation potentiometer can adjust argon arc welding after supply gas the time, according to different occasions and different welding requirements selection it is different after The time supply gas to protect the color and luster of weld seam and quality.Status indicator lamp Chang Liang upon power-up, it is used to refer to machine and is in logical Electricity condition.Overtemperature protection indicator lamp is in OFF state when machine normal work, after machine loads in long-time Overtemperature protection indicator lamp is bright when causing the internal temperature to exceed maximum rating, and machine enters guard mode, and now machine is empty Carry without output.Machine de-preservation state starts normal work when machine internal temperature is reduced to recovery point temperature.

As shown in Figure 2, the main circuit schematic diagram of the utility model welding machine, operation principle are as follows：Input 220V or 380V alternating currents, turn into direct current by rectifier bridge BR rectifications and after filtering.Direct current positive pole passes through a positive temperature system Number thermistor realizes upper electric pooling feature, avoids rush of current excessive and electric capacity is caused to damage.Direct current passes through four road IGBT Drive circuit exports the alternating current of inversion, and the electric current is sent on control panel by transformer and carries out Current Feedback Control.Output Alternating current fast recovery diode is output to by transformer T2, export direct current after rectification.Pass through after inverter circuit Relay selects primary tap, to complete the output control of different input voltages.Circuit is changed by 220 V and 380V dresses Carry out the break-make of control relay.Control panel is connected with mainboard, completes the control to weak current signal.

T1 is a current mode transformer, can be by the primary electric current of main transformer in a manner of small-signal transformer It is sent in control circuit, the normal work of welding machine is then controlled by Current Feedback Control, this is that welding machine normal work must Indispensable part.

The main operational principle of the utility model welding machine is to export alternating current by full bridge inverter, then passes through change again Depressor is output to fast recovery diode rectification again.Ac frequency can be improved by inverter circuit, transformer is reduced with this Volume and weight.The control of welding machine uses Current Feedback Control.PWM waveform is exported by control panel pwm control circuit, and then Control the output of drive circuit.

As shown in Figure 3 be voltage conversion circuit.Direct current after rectification forms one after two voltage-stabiliser tubes Individual low-voltage, partial pressure then is carried out by R7 and R8, and then control optocoupler U1.When input be 220V alternating current when R8 The undertension at both ends is to turn on U1 primary, and at this time U1 is idle, at the same in U1 secondary circuit Q22 base stage Voltage is high level, and Q22 normal works, now amplifier U1 in-phase input end is low level, and reverse input end is high level, Therefore output is low level, and at this time power device T3 does not start voltage, is off.Relay is in hanging shape State, now 3,5 pin connection, transformer select 2.3 pin as primary.When input is 380V alternating currents, optocoupler primary R8 voltages It is enough to turn on, now the secondary conducting of optocoupler, Q22 base voltages are 0, are closed.The pin of amplifier 12 is high level, output For high level, and now T3 is begun to turn on, relay adhesive, and switch contact 3,4 connects, and transformer selects 2,4 pin as primary. Input voltage can automatically be switched by this voltage selecting circuit, while output can also be maintained in certain scope. At the same time different signals is generated by amplifier while voltage is selected, then passes through the letter between mainboard and control panel Number line, which is sent on control panel, completes welding gun control.

220V and 380V voltage selecting circuits can so increase input according to the automatic switching circuit of input voltage The option of power supply, while the problem of will not also be broken down because of wrong power supply.According to circuit theory it is known that this electricity It is reliable that circuit performance is changed in press fitting, and can reach very accurate degree in the case of input power is normal.The circuit structure Design is simple, and component used is cheap, and negligible amounts, can reduce space when circuit board is designed, and reduces Departmental cost.

It is switching power circuit of the present utility model as shown in Figure 4.It is defeated with switching mode power supply transformer by control chip Go out the voltage of different amplitudes, the magnitude of voltage such as including+24V ,+15V ,+12V, be separately employed in the different part of circuit, such as cool down Fan power, AVSV Air Vent Solenoid Valve power supply etc..The acp chip of Switching Power Supply control is U7, that is, UC3845, according to the PWM Pulse width regulator can set different output, and corresponding resistance capacitance is exactly the regulation of output parameter, and particular content can With the technical data with reference to UC3845.Can export the DC voltage of different amplitudes by the circuit, it is convenient to main circuit and The control of control circuit.

If accompanying drawing 5 is drive control circuit of the present utility model.Inverter main circuit produces high-frequency ac by IGBT inversions Electricity, drive control circuit can control IGBT pulsewidth and make-and-break time.Input signal in drive control circuit is PWM Waveform, symmetrical PWM waveform is produced by control panel pwm chip UC3846, exporting four tunnels by driving transformer TR3 drives Dynamic waveform, corresponds to four road IGBT respectively.Two amplifiers are used respectively to two-way PWM waveform in the primary of driving transformer, used Carry out the size and waveform of control input signal, and the performance of circuit by the power amplification of drive control circuit, can be improved.Drive The effect of dynamic transformer is mainly amplified and isolation.The shape and dutycycle of four tunnel drive waveforms are basically identical, simply height The time of level is different.Pwm control signal is square wave, and waveform frequency is fixed, and normal use is tens kHz, should The size of signal is determined by the chip partial circuit above control panel.Two groups of square-wave signals have certain difference in time, It is exactly that two prescription ripple waveform duty cycle sums are less than 1,.The output of two groups of waveforms is all low level inside this time difference, and four Road driving is all low level output, and now four road IGBT are idle, and such case is called dead band, and this is also that welding machine can be just One of important parameter often to work.If two groups of duty cycle square waves can reach 1, then welding machine would operate in maximum output state, Now the working condition of welding machine is abnormally dangerous, because IGBT break-make all has the regular hour, once the turn-off time is more than Start the time, then can cause to occur the situation that two or more IGBT works simultaneously, at this time produced problem be exactly rectification it Both positive and negative polarity direct short-circuit afterwards, IGBT damage because of moment impact electric current.Driving transformer four tunnel drive waveforms of secondary output, Circuit in this section is mainly filtered and adjusted to transformer output voltage so that and driving voltage is more accurate, and And due to voltage spikes has been effective filtered out, enhance the effect of drive control.

Also include solenoid valve control circuit and high frequency control circuit in motherboard circuit, as shown in Figure 6.Solenoid valve conduction Signal is connected to control panel by mainboard, and then magnetic valve is controlled.When VALVE values are low level, Q7 base stages do not have Start voltage, be off.Magnetic valve is connected on mainboard by inserting shell, and connects 24V working power.When Q7 breaks Magnetic valve is in vacant state when opening, and now magnetic valve does not work.When VALVE input high levels, Q7 starts just Often work, now solenoid signal turns on, and magnetic valve starts normal work, and corresponding bond pattern is argon arc welding pattern.VALVE Signal corresponds to the arc welding gun switch signal above control panel, and VALVE exports high level when switch is pressed, and unclamps arc welding gun switch When export low level, therefore can be very good control argon arc welding supply gas the time.High-frequency circuit part mainly includes UC3845 U4, metal-oxide-semiconductor T4 and resistance capacitance, high voltage package T13 and high frequency contact around them.High-frequency inductor is by way of inserting shell High frequency contact and the both ends of electric capacity are connected to, realizes the control to high-frequency arc strike.The arc welding gun switch control line connected by mainboard Number, it is delivered on control panel, the welding gun control further according to control panel feeds back to motherboard circuit formation high-frequency controling signal.The signal The COMP ports being input on control chip UC3845, the port are error amplifier output, and loop compensation is formed to circuit. The pin signal is high level when arc welding gun switch is pressed, and at this time chip begins with output.No. 6 pin OUT terminals of the chip Mouthful be output end, the output end directly drives power MOSFET T4, up to 1A peak point current as drive signal, output Switching frequency is the half of oscillator frequency.The frequency of oscillator is carried out by the outer meeting resistance of No. 4 pin RT/CT ports with electric capacity Control, specific method to set up can refer to the technical data of the chip.The primary formation of high voltage package during MOSFET break-makes The voltage x current of change, now after the boosting of 100 times of the transformer, high-voltage signal passes to transformer secondary output.In secondary Two safety electric capacity are connected with loop, and loop is realized by a high frequency contact.The slotting shell connected in secondary loop J8 is the coil being wound on high-frequency inductor, and the bundle number ratio with high-frequency inductor is 2:5, it can be boosted again by coil, so Can occur the high pressure of a moment on high-frequency inductor.Lower switch is pressed when welding, output end will have a moment High pressure, while produce an instantaneous high current.So could be very clear-cut when the starting the arc, be not in the feelings of the not starting the arc Condition.

The utility model welding machine is a kind of argon arc welding, the dual-purpose machine of manual welding.No Load Ratio is relatively low when using argon arc welding, Typically the starting the arc can be more difficult in this case, while the phenomenon of current interruption occurs.Therefore the utility model welding machine is in circuit knot Equipped with booster circuit on structure, the starting the arc rate of argon arc welding pattern is improved with this.As shown in Figure 7, the circuit is a boosting Circuit.FZYH signal control chip UC3843, the power switch of the output end control booster circuit of chip, the voltage of lifting is carried Unloaded output end is supplied, electric current during so as to improve striking.Circuit design structure gold is simple, while can reach fine Effect, when striking be not in the not starting the arc either current interruption situation.When FZYH signals are high level, now three Pole pipe Q21 is turned on, and Q20 base voltages reduce, and Q20 is stopped, and UC3843 COMP ports input is high level, Switching Power Supply Circuit is started working, output increase.The circuit coordinates the hot start circuit above control panel, solves the argon arc welding starting the arc well Problem.

Circuit structure on mainboard is relatively simple, and has the place much optimized in structure design, for example reduces member The quantity of device, the performance for improving prototype part etc..High-frequency method is carried to reduce output main transformer by inversion in main circuit The volume and weight of depressor, can thus arrange transformer on circuit boards, not only facilitate placement-and-routing, while also subtract The small volume of transformer, saves space, reduces production and transportation cost.To coordinate the setting of radiator, IGBT with it is fast The key componentses such as recovery diode all place the radiating effect in place, adding these heating elements.Mainboard Design coordinated cold wind air channel and complete machine structure well so that machine volume reduce, heat dispersion enhancing, welding effect It is more stable.

If accompanying drawing 9 ~ 11 is the control circuit schematic diagram of the utility model welding machine.The utility model welder circuit plate mainly has Mainboard and control panel, motherboard circuit mainly include inverter main circuit, switching power circuit, 220V and 380V voltage conversions electricity Road, high-frequency arc ignition circuit, booster circuit, solenoid valve control circuit and IGBT drive circuit, control panel include temperature protection electricity Road, welding gun control circuit, pwm control circuit, current regulating circuit, after supply gas regulation circuit, under-voltage protecting circuit, short-circuit protection Circuit, auxiliary arc ignition circuit, hot start circuit, high frequency control circuit, limited pulse width circuit etc..According to this between control panel and mainboard Utility model welding machine principle is connected by signal connecting line.The utility model welding machine control principle drawing is the core of welding machine control Center portion point, which includes most current control and voltage control and protection circuit.By the connection between mainboard, The signal that mainboard is provided is handled, and is then fed back to butt welding machine work on mainboard again and is controlled.

Control circuit is using UC3846 as PWM controller.UC3846 is a kind of Current Control Mode PWM Switched control of both-end output Coremaking piece, the opposite PWM waveform of two paths of signals can be produced.16 pin of the chip are as shutdown side, generally as protection circuit Output point, when welding machine occur it is abnormal when, the signal of 16 pin is connected to by circuit can put 1, at this time control chip will close, Now produced without drive signal, welding machine does not export.The error amplifier of the chip is as follower, therefore reverse input end With the feedback compensation terminal short circuit of error amplifier, main regulation and control port of the positive input as welding machine can be to accounting for Empty ratio is adjusted.Current limliting level sets the pin CS/SS of end 1 to be configured by a bleeder circuit, while passes through electric capacity electricity Solution electric capacity C45 and electric capacity C2 can make it that signal is more stable.No. 8 pin and No. 9 pin can adjust the frequency of output waveform, according to Different resistance, capacitance is set to change output frequency.No. 11 pin and No. 14 pin are output ends, and two-way PWM waveform is in pair Title form, two-way waveform duty cycle sum are less than 1, mainboard are transmitted the signal to by connecting line.Because UC3846 bands carry energy Power is weaker, so thereafter typically can one driving chip of band or power amplification circuit.The utility model welding machine is used herein Be two-way power amplification circuit.The signal passes through driving circuit section, passes through the tunnel of regulation output control four of drive circuit IGBT break-make, reach the effect of DC inversion.

The utility model welding machine is 220V and 380V dual power supply inverter argon arc welding machines, 220V and 380V can be used to exchange Electricity is used as input power.Welding machine can be powered when voltage is less than certain value, but will not enter working condition.The portion Point function is realized by under-voltage protecting circuit.As shown in accompanying drawing 9 ~ 11, when input voltage is too low, Switching Power Supply input reduces, Exporting 15V voltages reduces.Now the reverse input end voltage of under-voltage protecting circuit will be less than in-phase input end, and amplifier output is high Level, by R5 and R8 partial pressures, UC3846 No. 16 pin shutdown sides are output signals to, control chip can be turned off.Work as machine Amplifier output is low level during normal operation, and now No. 16 pin voltages are very low, do not reach the voltage off value of chip.By owing Voltage protection circuit can avoid welding machine from being run in the case where crossing low-voltage.

The starting the arc when in use of the utility model welding machine is convenient, while equipped with hot start circuit and auxiliary arc ignition circuit. As shown in the lower left corner of accompanying drawing 9, mainboard booster circuit output end VOUT inputs as hot start circuit, when welding machine selects TIG patterns When, because argon arc welding floating voltage is low, so the signal in the in-phase input end of amplifier can be less than reverse input end.Now work( The input of rate MOSFET element T9 base stages is high level, and T9 conductings, now amplifier U1 reverse input end voltage reduces, and compares In-phase input end is low, so output is high level.It is superimposed by the high level of 8 pin with input voltage, pi regulator U6 can be made Increase output, so as to increase the signal of control chip UC3846 error amplifier in-phase input ends.It is defeated when pressing arc welding gun switch Go out end and a transient high-current occurs, can be very good to help striking.When under MMA patterns, because manual welding is unloaded Voltage is high, so the signal in the in-phase input end of amplifier can be higher than reverse input end, therefore hot start function equally exists. In arc ignition circuit is aided in, when using argon arc welding pattern, MOSFET element T10 is turned on, and now transistor base is low Level, triode do not work.FZYH signals are high level.In motherboard circuit, as shown in accompanying drawing 9 ~ 11, when FZYH signals are height During level, now triode Q21 is turned on, and Q20 base voltages reduce, and Q20 is stopped, and UC3843 COMP ports input is height Level, switching power circuit are started working, output increase.For TIG patterns, hot start circuit is with auxiliary arc ignition circuit It is engaged, two circuit functions ensure pattern of the welding machine in argon arc welding low no-load in the in-phase input end of same amplifier Under can the starting the arc it is easy.Hot start circuit and the arch problem that auxiliary arc ignition circuit is solution welding machine, are imitated for the argon arc welding starting the arc Fruit it is further preferred that.

Overtemperature protection phenomenon occurs when long-time loads in the utility model welding machine, while welding gun and work is occurring Protection phenomenon also occurs when short-circuit for a long time in part.This two parts is temperature-sensitive protection point road and short-circuit protection circuit respectively.Two Partial circuit output end in the case where protection occurs in machine is all high level, and this high level acts on triode Q3 base Pole, triode Q3 can be turned on, so as to drag down potentiometer VR2 2 pin signals, believed so as to control chip UC3846 input Number.Temperature-sensitive protection point road uses NTC negative tempperature coefficient thermistors, and amplifier U6 reverse input is used as by electric resistance partial pressure End.When temperature is normal, reverse input end voltage is higher than in-phase input end, export for low level, machine it is normal.When temperature exceedes During predetermined value, reverse input end voltage is less than in-phase input end, exports as high level.It is bright now to overheat yellow indicator lamp, together When act on triode Q3, machine enters guard mode.The protection point of the temperature protection circuit can according to R3, R11, R10, R13 is voluntarily set.Temperature protection circuit can ensure welding machine normal work in rated temperature, avoid temperature too high and cause height Frequency inductance and transformer are burnt out.Short-circuit protection circuit mainly acts on manual welding pattern.T8 is led naturally under argon arc welding pattern Logical, now amplifier U6 reverse input ends are high level, export low level, machine normal work.When use manual welding pattern When T8 do not work, amplifier inverting input signal now is provided by VFB.When welding rod and workpiece occur short-circuit, VFB letters Number reduce, in-phase input end is low level, and now output be high level, while acts on amplifier Q3, and such case is as being same as above Temperature protection circuit is stated, machine enters guard mode.Pass through temperature and short-circuit protection circuit, it is ensured that machine is in positive reason Run under condition, avoid some safety problems, while also improve the reliability of machine.

The utility model welding machine is supplied gas the time after being adjusted when using argon arc welding function.Such as the bottom institute of accompanying drawing 9 Show, the resistance sizes of RC circuits can be adjusted by potentiometer VR4, so as to change electric capacity C34 discharge time.Closed in welding gun Afterwards, amplifier U1 in-phase input end is not reduced to low level, but by electric capacity C34 and conductive discharge, export high level Control magnetic valve works on.Function of supplying gas afterwards can ensure the perfection of argon-arc welding seam, avoid welding from completing at once when dying The situation of the weld seam oxidation of appearance.Simultaneously can according to different welding workpiece materials and size of current selection it is different after give It is the gas time, convenient to be used in different environment.

The inverter mode of welding machine produces PWM waveform by UC3846 and is controlled.When two-way waveform duty cycle exceedes During rated value, both positive and negative polarity short circuit phenomenon occurs in machine, it is therefore desirable to is limited in pulsewidth in certain scope.When detecting arteries and veins During wide overrate, amplifier U9 output ends can export high level, and shutdown side of the signal as control chip can be timely Closing control chip, be allowed to no output, so equally play a part of protection.The main regulation part of welding machine is front panel The current regulation partial circuit be the upper left hand corner section of accompanying drawing 9., can accurate adjustment control core by adjusting potentiometer VR3 Piece UC3846 input signal, so as to adjust welding current size.Access protection circuit and heat in circuit in this section simultaneously The output end of arc striking circuit, dragged down or superimposed voltage by protection circuit and the output end of hot start circuit, to play Control the effect of output.

The utility model welding machine control circuit part include temperature protection circuit, welding gun control circuit, pwm control circuit, Current regulating circuit, after supply gas regulation circuit, under-voltage protecting circuit, short-circuit protection circuit, auxiliary arc ignition circuit, hot start electricity Road, high frequency control circuit, limited pulse width circuit etc., linked together between each circuit according to the utility model welding machine control principle, By and mainboard combination can be good at control welding machine operation and protection.

It is visible by described above, the utility model welding machine have oneself unique circuit and complete machine structure mentality of designing and Method.The use of different input powers can be not only realized, while machine can be free in the case of argon arc welding with manual welding Switching welding method.Designed welder circuit schematic diagram, complete machine structure, all it is that the utility model welding machine can be different defeated Enter under voltage and different bond patterns where the basic reason with good welds performance.The utility model welding machine is not only realized Two kinds of Power convert, manual welding argon arc welding bond patterns, while also meet efficient and inexpensive, high reliability, manufacture work The characteristics of skill technical advance.

Claims (9)

1.220V and 380V dual power supply IGBT inverter argon arc welding machines, including cabinet, blower fan, mainboard, control panel, it is characterised in that： Chassis backplane（13）Four base angles of outer surface are respectively fixed with under-chassis（17）, the rear board of cabinet（7）Outside be provided with radiating Device one（23）, radiator one（23）Top be provided with fan shroud（24）, fan shroud（24）Both sides be provided with rectifier bridge（25）, blower fan Cover（24）Top be provided with input power cord（26）, input power cord（26）Side be provided with input switch（27）, behind cabinet Plate（7）Inner side be provided with blower fan（14）And magnetic valve（28）, blower fan（14）Rear be provided with radiator two（16）, radiator two （16）Side be provided with radiator three（19）, radiator three（19）Lower section be provided with IGBT module（18）, radiator three（19）'s Side and support column（20）It is connected, radiator two（16）Rear be provided with mainboard（21）, mainboard（21）It is provided with two poles of fast recovery Pipe（15）, high-frequency inductor（12）, transformer（22）, mainboard（21）With control panel（3）It is connected, control panel（3）Positioned at mainboard（21） With case front panel（4）Between, control panel（3）Lower section be provided with copper bar（11）, copper bar（11）On be connected with young waiter in a wineshop or an inn's core mounting seat （10）, case front panel（4）It is provided with change-over switch（5）, knob（6）, plug-assembly（8）, two core aviation sockets（9）, cabinet （2）Top be provided with handle（1）.

The circuit of 2.220V and 380V dual power supply IGBT inverter argon arc welding machines, including：Main control circuit, 220V and 380V voltages turn Change circuit, switching power circuit, IGBT drive controls circuit, magnetic valve and high frequency control circuit, draught fan control circuit, boosting electricity Road, control circuit, it is characterised in that：Main control circuit is as follows：Rectifier bridge BR No. 1 port is divided into two-way, respectively with AC1 ends Mouth, electric capacity C1 one end are connected, and the electric capacity C1 other end is divided into two-way, whole respectively with AC2 ports, rectifier bridge BR No. 3 ports Stream bridge BR No. 2 ports are divided into seven tunnels, respectively one end with electric capacity C4, electric capacity C5 one end, resistance R2 one end, electric capacity C7 One end, IGBT pipes Q2 emitter stage, IGBT pipes Q4 emitter stage, DC- ports be connected, the electric capacity C7 other end is divided into seven tunnels, One end with electric capacity C2, the electric capacity C5 other end, electric capacity C3 one end, the resistance R2 other end, resistance R1 one end, electricity respectively Hold the C7 other end, electric capacity C6 one end is connected, rectifier bridge BR No. 4 ports are divided into two-way, respectively with the one of thermistor RT End, relay J1 one end are connected, and the relay J1 other end is divided into eight tunnels, respectively the other end with thermistor RT, electric capacity The C2 other end, the electric capacity C3 other end, the resistance R1 other end, the electric capacity C6 other end, IGBT pipes Q1 current collection end, IGBT Pipe Q3 current collection end, DC+ ports is connected, and IGBT pipes Q1 transmitting terminal is divided into three tunnels, respectively with e1 port, IGBT pipes Q2 current collection End, relay J2 No. 3 ports are connected, and IGBT pipes Q1 base stage is connected with G1 ports, IGBT pipes Q2 base stage and G3 ports phase Even, IGBT pipes Q3 transmitting terminal is divided into three tunnels, respectively with E2 ports, IGBT pipes Q4 current collection end, transformer T1 No. 2 port phases Even, IGBT pipes Q3 base stage is connected with G2 ports, and IGBT pipes Q4 base stage is connected with G4；No. 4 ports of the relay J2 point For two-way, No. 1 port with transformer T2, transformer T2 No. 4 ports are connected respectively, relay J2 No. 5 ports and transformation Device T2 No. 3 ports are connected, and No. 1 port of the transformer T1 is connected with transformer T2 No. 2 ports, No. 3 of transformer T1 Port is connected with CT No. 2 ports, and transformer T1 No. 4 ports are connected with CT No. 1 port, transformer T2 No. 5 ports point For four tunnels, one end with diode D2 ', diode D1 ' one end, diode D1 one end, resistance R3 one end are connected respectively, The resistance R3 other end is connected with resistance R4 one end, and the resistance R4 other end is connected with electric capacity C8 one end, and electric capacity C8's is another One end is divided into eight tunnels, respectively the other end with diode D1 ', the diode D1 other end, the diode D2 ' other end, two poles Pipe D2 one end, diode D3 one end, diode D3 ' one end, electric capacity C9 one end, VOUT+ ports are connected, transformer T2 No. 6 ports be divided into two classes, be connected respectively with transformer T2 No. 7 ports, VOUT- ports, transformer T2 No. 8 ports are divided into One end phase on four tunnels, the respectively other end with diode D2, the diode D3 ' other end, the diode D3 other end, resistance R5 Even, the resistance R5 other end is connected with resistance R6 one end, and the resistance R6 other end is connected with the electric capacity C9 other end.

3. the circuit of 220V and 380V dual power supplies IGBT inverter argon arc welding machines according to claim 2, it is characterised in that：Institute It is as follows to state 220V and 380V voltage conversion circuits：DC+ ports are connected with voltage-regulator diode Z1 one end, and voltage-regulator diode Z1's is another One end is connected with voltage-regulator diode Z2 one end, and the voltage-regulator diode Z2 other end is connected with resistance R7 one end, resistance R7's The other end is divided into two-way, and No. 1 port with photoelectrical coupler U1A, resistance R8 one end are connected respectively, the resistance R8 other end point For two-way, No. 2 ports with DC- ports, photoelectrical coupler U1A are connected respectively, and photoelectrical coupler U1A No. 3 ports are divided into four Road, respectively the colelctor electrode with triode Q22, resistance R11 one end, ground, electric capacity C10 one end be connected, photoelectrical coupler U1A No. 4 ports be divided into two-way, one end with resistance R9, triode Q22 base stage are connected respectively, and the resistance R9 other end is divided into two Road, respectively one end with+15V power supplys, resistance R10 be connected, the resistance R10 other end is divided into four tunnels, respectively with triode Q22's Emitter stage, the resistance R11 other end, the electric capacity C10 other end, amplifier U1D No. 12 ports are connected, and the 11 of amplifier U1D Number port is connected with 5V power supplys, and amplifier U1D No. 14 ports are connected with FET T3 gate pole, FET T3 source electrode Ground connection, FET T3 drain electrode are divided into four tunnels, respectively one end with diode D4, relay J7 No. 2 ports, amplifiers U17C No. 9 ports, electric capacity C11 one end is connected, and the diode D4 other end is connected with relay J7 No. 1 port, relay Device J7 No. 3 ports are connected with e1 port, and relay J7 No. 4 ports are divided into two-way, respectively No. 1 port with transformer T2, Transformer T2 No. 4 ports are connected, and relay J7 No. 5 ports are connected with transformer T2 No. 3 ports, No. 2 of transformer T2 Port is connected with E2 ports, and the electric capacity C11 other end is divided into six tunnels, respectively one end with resistance R12, resistance R13 one end, electricity Appearance C12 one end, voltage-regulator diode Z5 one end, amplifier U14A No. 3 ports, amplifier U16B No. 6 ports are connected, electricity Resistance R12 the other end be connected with+15V power supplys, the resistance R13 other end is divided into three tunnels, respectively the other end with electric capacity C12, Face, the voltage-regulator diode Z5 other end are connected, and amplifier U17C No. 10 ports are divided into five tunnels, respectively with the 4 of amplifier U16B Number port, resistance R14 one end, resistance R15 one end, electric capacity C13 one end, electric capacity C14 one end are connected, resistance R14's The other end is divided into two-way, and the other end with ground, electric capacity C13 is connected respectively, and the electric capacity C14 other end is divided into three tunnels, respectively with The resistance R15 other end, resistance R16 one end, amplifier U14A No. 2 ports are connected, resistance the R16 other end and+15V electricity Source is connected, and amplifier U14A No. 1 port is connected with diode D5 one end, and the diode D5 other end is divided into two-way, respectively One end, SHDN ports with diode D6 are connected, and the diode D6 other end is connected with amplifier U16B No. 7 ports, amplification Device U17C No. 8 ports are connected with diode D7 one end, and the diode D7 other end is connected with 380-0/220-1 ports.

4. the circuit of 220V and 380V dual power supplies IGBT inverter argon arc welding machines according to claim 2, it is characterised in that：Institute It is as follows to state switching power circuit：Power supply chip U7 VFB ports are connected with electric capacity C17 one end, and the electric capacity C17 other end is divided into Three tunnels, respectively the COMP ports with power supply chip U7, photoelectrical coupler U2B No. 3 ports, resistance R19 one end be connected, resistance R19 other end ground connection, photoelectrical coupler U2B No. 4 ports are connected with VREF ports, power supply chip U7 RT/CT ports point For two-way, one end with resistance R17, electric capacity C15 one end are connected respectively, and electric capacity C15 other end ground connection, resistance R17's is another One end is connected with power supply chip U7 VREF ports, and the ISNS ports of power supply chip are divided into two-way, respectively with the one of resistance R18 End, electric capacity C16 one end are connected, and electric capacity C16 other end ground connection, the resistance R18 other end is connected with CFB ports, power supply core Piece U7 GND ports ground connection, power supply chip U7 OUT terminal mouth are connected with resistance R20 one end, the resistance R20 other end and field Effect pipe T11 gate pole is connected, and FET T11 source electrode is divided into two-way, respectively one end with resistance R21, CFB ports phase Even, resistance R21 other end ground connection, FET T11 drain electrode are divided into two-way, respectively one end with diode D9, transformation Device T12 No. 10 ports are connected, and the diode D9 other end is divided into two-way, respectively one end with electric capacity C19, the one of resistance R22 End be connected, the resistance R22 other end is divided into three tunnels, respectively the other end with electric capacity C19, vdd terminal mouth, No. 12 of transformer T12 Port is connected, and transformer T12 No. 7 ports are connected with diode D8 one end, and the diode D8 other end is divided into three tunnels, respectively It is connected with power supply chip U7 VCC ports, electric capacity C18 one end, electric capacity C20 one end, the electric capacity C18 other end is divided into three Road, respectively No. 8 ports with ground, the electric capacity C20 other end, transformer T12 be connected, transformer T12 No. 1 port and two poles Pipe D11 one end is connected, and the diode D11 other end is divided into four tunnels, respectively one end with electric capacity C23, electric capacity C24 one end, Diode D12 one end ,+15V power supplys are connected, and the diode D12 other end is connected with diode D13 one end, diode D13 The other end be connected with diode D14 one end, the diode D14 other end is connected with+12V power supplys, the electric capacity C24 other end Be divided into six tunnels, respectively with ground, the electric capacity C23 other end, transformer T12 No. 3 ports, electric capacity C22 one end, electric capacity C21 One end, transformer T12 No. 5 ports be connected, the electric capacity C22 other end is divided into three tunnels, respectively the other end with electric capacity C21 ,+ 24V power supplys, diode D10 one end are connected, and the diode D10 other end is connected with transformer T12 No. 6 ports；The light Electric coupler U2B No. 1 port is connected with resistance R24 one end, and the resistance R24 other end is connected with resistance R23 one end, electricity The resistance R23 other end is divided into two-way, and No. 2 ports with photoelectrical coupler U2B, voltage-regulator diode Z6 one end are connected respectively, surely The pressure diode Z6 other end is connected with voltage-regulator diode Z7 one end, voltage-regulator diode Z7 other end ground connection.

5. the circuit of 220V and 380V dual power supplies IGBT inverter argon arc welding machines according to claim 2, it is characterised in that：Institute It is as follows to state IGBT drive control circuits：PWM-A ports are divided into four tunnels, respectively one end with electric capacity C25, resistance R25 one end, Resistance R26 one end, electric capacity C26 one end is connected, and the electric capacity C25 other end is divided into two-way, another with resistance R25 respectively End, voltage-regulator diode Z8 one end are connected, and the voltage-regulator diode Z8 other end is connected with triode Q11 base stage, triode Q11 Emitter stage be divided into two-way, one end with resistance R29, triode Q25 emitter stage are connected respectively, the resistance R29 other end with+ 15V power supplys are connected, and the electric capacity C26 other end is divided into two-way, respectively the other end with resistance R26, voltage-regulator diode Z11 one end It is connected, the voltage-regulator diode Z11 other end is connected with triode Q26 base stage, and triode Q26 colelctor electrode is divided into two-way, point No. 1 port of colelctor electrode, transformer TR3 not with triode Q11 is connected, triode Q26 grounded emitter, PWM-B ports It is divided into four tunnels, one end with electric capacity C27, resistance R27 one end, resistance R28 one end, electric capacity C28 one end are connected respectively, electricity The other end for holding C27 is divided into two-way, and the other end with resistance R27, voltage-regulator diode Z9 one end are connected respectively, voltage-regulator diode The Z9 other end is connected with triode Q25 base stage, and the electric capacity C28 other end is divided into two-way, another with resistance R28 respectively End, voltage-regulator diode Z10 one end are connected, and the voltage-regulator diode Z10 other end is connected with triode Q27 base stage, triode Q27 colelctor electrode is divided into two-way, and the colelctor electrode with triode Q25, transformer TR3 No. 2 ports are connected respectively, triode Q27 Grounded emitter, transformer TR3 No. 3 ports are divided into two-way, respectively with diode D15 one end, resistance R30 one end phase Even, the resistance R30 other end is connected with resistance R31 one end, and the resistance R31 other end is connected with triode Q28 base stage, and three Pole pipe Q28 emitter stage is divided into three tunnels, respectively the other end with diode D15, resistance R32 one end, resistance R33 one end phase Even, the resistance R32 other end is divided into four tunnels, respectively the other end with resistance R33, voltage-regulator diode Z12 one end, resistance R34 One end, G1 ports be connected, the other end of resistance R34 is divided into four tunnels, respectively with e1 port, voltage-regulator diode Z12 the other end, Triode Q28 colelctor electrode, transformer TR3 No. 4 ports are connected, and transformer TR3 No. 7 ports are divided into two-way, respectively with two Pole pipe D16 one end, resistance R35 one end are connected, and the resistance R35 other end is connected with resistance R36 one end, resistance R36's The other end is connected with triode Q16 base stage, and triode Q16 emitter stage is divided into three tunnels, another with diode D16 respectively End, resistance R37 one end, resistance R39 one end are connected, and the resistance R37 other end is divided into four tunnels, another with resistance R39 respectively One end, voltage-regulator diode Z13 one end, resistance R38 one end, G2 ports are connected, and the resistance R38 other end is divided into four tunnels, point No. 8 ports not with E2 ports, the voltage-regulator diode Z13 other end, triode Q16 colelctor electrode, transformer TR3 are connected, and become Depressor TR3 No. 5 ports are divided into four tunnels, respectively the colelctor electrode with triode Q23, voltage-regulator diode Z14 one end, resistance R44 One end, DC- ports be connected, the resistance R44 other end is divided into four tunnels, respectively the other end with voltage-regulator diode Z14, resistance R42 one end, resistance R43 one end, G4 ports are connected, and the resistance R42 other end is divided into three tunnels, another with resistance R43 respectively One end, triode Q23 emitter stage, diode D17 one end are connected, triode Q23 base stage and resistance R41 one end phase Even, the resistance R41 other end is connected with resistance R40 one end, and the resistance R40 other end is divided into two-way, respectively with diode D17 The other end, transformer TR3 No. 6 ports are connected；Transformer TR3 No. 9 ports are divided into four tunnels, respectively with triode Q24's Colelctor electrode, voltage-regulator diode Z15 one end, resistance R49 one end, DC- ports are connected, and the resistance R49 other end is divided into four tunnels, The other end with voltage-regulator diode Z15, resistance R47 one end, resistance R48 one end, G3 ports are connected respectively, resistance R47's The other end is divided into three tunnels, and the other end with resistance R48, triode Q24 emitter stage, diode D18 one end are connected respectively, and three Pole pipe Q24 base stage is connected with resistance R46 one end, and the resistance R46 other end is connected with resistance R45 one end, resistance R45's The other end is divided into two-way, and the other end with diode D18, transformer TR3 No. 10 ports are connected respectively.

6. the circuit of 220V and 380V dual power supplies IGBT inverter argon arc welding machines according to claim 2, it is characterised in that：Institute State magnetic valve and high frequency control circuit is as follows：Chip U4 COMP ports are connected with diode D20 one end, diode D20's The other end is divided into two-way, and one end with HF ports, electric capacity C29 is connected respectively, electric capacity C29 other end ground connection, chip U4 VFB Port is grounded, and chip U4 VCC ports are divided into two-way, and one end with+15V power supplys, electric capacity C30 is connected respectively, and electric capacity C30's is another One end is grounded, and chip U4 GUN ports ground connection, chip U4 RT/CT ports are divided into two-way, respectively one end with electric capacity C31, electricity Resistance R52 one end is connected, and the resistance R52 other end is connected with chip U4 VREF ports, and the electric capacity C31 other end is divided into two Road, respectively one end with electric capacity C32, ground be connected, the electric capacity C32 other end is divided into two-way, respectively with chip U4 ISENSE Port, resistance R53 one end are connected, and the resistance R53 other end is divided into two-way, respectively the source electrode with FET T4, resistance R54 One end be connected, resistance R54 other end ground connection, FET T4 gate pole is connected with resistance R51 one end, resistance R51's The other end is connected with chip Y4 OUT ports, and FET T4 drain electrode is connected with transformer T13 No. 1 port, transformation Device T13 No. 2 ports are divided into two-way, and one end with electric capacity C36, electric capacity C35 one end are connected respectively, the electric capacity C35 other end Be divided into two-way, the other end with electric capacity C36, ground are connected respectively, and transformer T13 No. 3 ports are divided into three tunnels, respectively with port G2 No. 2 ports, electric capacity C33 one end, electric capacity C34 one end is connected, and the electric capacity C34 other end is divided into two-way, respectively with end Mouth J8 No. 1 port, the electric capacity C33 other end are connected, and port J8 No. 2 ports are divided into No. 1 end of the two-way respectively with port G2 Mouth, transformer T13 HV ports are connected.

7. the circuit of 220V and 380V dual power supplies IGBT inverter argon arc welding machines according to claim 2, it is characterised in that：Institute It is as follows to state draught fan control circuit：No. 1 port of blower fan is divided into two-way, and one end with+24V power supplys, diode D19 is connected respectively, The diode D19 other end is divided into two-way, and No. 2 ports with blower fan, triode Q7 colelctor electrode are connected respectively, triode Q7's Grounded emitter, triode Q7 base stage are connected with resistance R50 one end, the resistance R50 other end and the VALVE ports of mainboard It is connected.

8. the circuit of 220V and 380V dual power supplies IGBT inverter argon arc welding machines according to claim 2, it is characterised in that：Institute It is as follows to state booster circuit：Chip U13 VFB ports are connected with electric capacity C87 one end, and the electric capacity C87 other end is divided into two-way, point The colelctor electrode of COMP ports, triode Q20 not with chip U13 is connected, triode Q20 grounded emitter, triode Q20's Base stage is divided into two-way, and the colelctor electrode with triode Q21, resistance R24 one end are connected respectively, resistance the R24 other end and chip U13 VREF ports are connected, triode Q21 grounded emitter, and triode Q21 base stage is divided into two-way, respectively with resistance R25 One end, resistance R26 one end be connected, resistance R26 other end ground connection, the resistance R25 other end be divided into two-way respectively with electricity One end, the FZYH ports for holding C78 are connected, and electric capacity C78 other end ground connection, chip U13 RT/CT ports are divided into two-way, respectively One end, electric capacity C84 one end with resistance R79 are connected, and electric capacity C84 other end ground connection, the resistance R79 other end is divided into two Road, respectively one end with electric capacity C80, chip U13 VREF ports be connected, electric capacity C80 other end ground connection, chip U13's ISNS ports are divided into two-way, and one end with resistance R89, electric capacity C85 one end are connected respectively, and the resistance R89 other end is divided into two Road, respectively one end with resistance R77, FET T10 source electrode be connected, the electric capacity C85 other end is divided into six tunnels, respectively with core Piece U13 GND ports, ground, the resistance R77 other end, electric capacity C79 one end, resistance R90 one end, electric capacity C83 one end It is connected, the electric capacity C83 other end is divided into three tunnels, respectively one end with resistance R64, diode D52 one end, diode D53 One end is connected, and the diode D53 other end is connected with resistance R78 one end, and the resistance R78 other end is connected with VOUT ports, The resistance R64 other end is connected with resistance R91 one end, and the resistance R91 other end is divided into two-way, another with resistance R90 respectively One end, the electric capacity C79 other end are connected, and the diode D52 other end is divided into two-way, respectively one end with high-frequency inductor L2, field Effect pipe T10 drain electrode is connected, and the high-frequency inductor L2 other end is connected with diode D54, FET T10 gate pole and electricity Resistance R113 one end be connected, the resistance R113 other end is connected with chip U13 OUT terminal mouth, chip U13 VCC ports and+ 15V power supplys are connected.

9. the circuit of 220V and 380V dual power supplies IGBT inverter argon arc welding machines according to claim 2, it is characterised in that：Institute It is as follows to state control circuit：Control chip U3 SHDN ports are divided into four tunnels, respectively one end with resistance R8, resistance R5 one end, Resistance R106 one end, electric capacity C3 one end is connected, and the resistance R8 other end is connected with CT ports, and the resistance R5 other end is divided into Two-way, respectively one end with electric capacity C3, ground be connected, the resistance R106 other end is connected with amplifier U10C No. 8 ports, puts Big device U10C No. 9 ports are divided into three tunnels, respectively one end with electric capacity C67, resistance R50 one end, resistance R49 one end phase Even, the resistance R50 other end is connected with+14V power supplys, resistance R49 other end ground connection, electric capacity C67 other end ground connection, amplification Device U10C No. 10 ports are divided into three tunnels, respectively one end with resistance R100, resistance R99 one end, electric capacity C69 one end phase Even, the resistance R99 other end is connected with VREF ports, and the resistance R100 other end is divided into one of two-way respectively with resistance R101 End, electric capacity C68 one end are connected, and the resistance R101 other end is divided into three tunnels, respectively the other end with electric capacity C68, ground, electric capacity The C69 other end is connected, and control chip U3 COMP ports are connected with control chip U3 ERA- ports, control chip U3's ERA+ ports are divided into four tunnels, respectively one end with electric capacity C12, electric capacity C42 one end, triode Q9 transmitting terminal, resistance R109 One end be connected, electric capacity C12 other end ground connection, the electric capacity C42 other end is connected with FET T13 drain electrode, and field is imitated Should pipe T13 source ground, FET T13 gate pole is connected with TIG1/MMA0 ports, and the resistance R109 other end is divided into two Road, respectively one end with electric capacity C18, amplifier U6A No. 1 port be connected, the electric capacity C18 other end and resistance R107 one end It is connected, amplifier U6A No. 2 ports are divided into two-way, and the other end with resistance R107, resistance R32 one end are connected respectively, resistance The R32 other end is divided into three tunnels, and one end with resistance R35, electric capacity C32 one end, diode D24 one end are connected respectively, electricity R35 other end ground connection, electric capacity C32 other end ground connection are hindered, the diode D24 other end is connected with CT ports, amplifier U6A No. 3 ports be divided into four tunnels, one end with electric capacity C58, resistance R36 one end, resistance R108 one end, resistance R98 respectively One end is connected, and electric capacity C58 other end ground connection, the resistance R108 other end is connected with VREF ports, the resistance R98 other end and Diode D26 one end is connected, and the resistance D26 other end is connected with 380-0/220-1 ports, and the resistance R36 other end is divided into Two-way, respectively the colelctor electrode with triode Q3, swept resistance VR2 sliding end be connected, swept resistance VR2 one end is with sliding electricity Resistance VR3 sliding end is connected, and swept resistance VR2 other end ground connection, swept resistance VR3 one end is divided into two-way, respectively with electricity Hinder R94 one end, FET T15 source electrode is connected, swept resistance VR3 other end ground connection, the resistance R94 other end with VREF ports are connected, and FET T15 drain electrode is connected with VREF ports, and FET T15 gate pole is divided into three tunnels, respectively One end, resistance R93 one end of one end, resistance R96 with electric capacity C39 are connected, and the electric capacity C39 other end is divided into two-way, respectively It is connected with the other end on ground, resistance R96, the resistance R93 other end is connected with No. 2 ports of mainboard J3 ports, mainboard J3 ends No. 1 port of mouth is divided into two-way, and one end with electric capacity C66, resistance R97 one end are connected respectively, electric capacity C66 another termination Ground, the resistance R97 other end are connected with SHDN ports, and No. 3 ports of mainboard J3 ports are connected with HF ports, mainboard J3 ports No. 4 ports are connected with electric capacity C70 one end, electric capacity C70 other end ground connection, No. 5 ports and the GND ports phase of mainboard J3 ports Even, No. 6 ports ground connection of mainboard J3 ports, the grounded emitter of the triode Q3, triode Q3 base stage are divided into two-way, point One end, resistance R19 one end not with resistance R31 are connected, and resistance R31 other end ground connection, the resistance R19 other end is with lighting Diode D7 one end is connected, and the light emitting diode D7 other end is divided into two-way, respectively one end with resistance R11, amplifier U11B No. 7 ports are connected, and amplifier U11B No. 5 ports are divided into three tunnels, respectively one end with resistance R13, resistance R11 it is another One end, resistance R3 one end are connected, and resistance R13 other end ground connection, the resistance R3 other end is divided into two-way, respectively with VREF ends Mouth, resistance R10 one end are connected, and amplifier U11B No. 6 ports are divided into three tunnels, respectively the other end with resistance R10, electric capacity C25 one end, No. 1 port of mainboard OT1 ports are connected, and electric capacity C25 other end ground connection, No. 2 ports of mainboard OT1 ports connect Ground；Control chip U3 GND ports ground connection, control chip U3 VC ports are connected with+14V power supplys, control chip U3 VREF Port is divided into four tunnels, respectively one end with resistance R89, resistance R91 one end, resistance R143 one end, electric capacity C2 one end phase Even, the electric capacity C2 other end is divided into three tunnels, and one end with electric capacity C45, ground, resistance R142 one end are connected respectively, resistance The R142 other end is divided into three tunnels, and the other end with SS ports, the electric capacity C45 other end, resistance R143 is connected respectively, resistance The R89 other end is divided into three tunnels, and the colelctor electrode with triode Q8, electric capacity C65 one end, triode Q9 base stage are connected respectively, The electric capacity C65 other end is divided into two-way, and the colelctor electrode with triode Q9, ground are connected respectively, the resistance R91 other end and three poles Pipe Q8 base stage is connected, and triode Q8 emitter stage is connected with FET T16 drain electrode, and FET T16 source electrode connects Ground, FET T16 gate pole are connected with TIG1/MMA0 ports, and control chip U3 VIN ports are divided into four tunnels, respectively with electricity Resistance R103 one end, electric capacity C71 one end, electric capacity C72 one end, electric capacity C5 one end are connected, electric capacity C5 other end ground connection, Electric capacity C71 other end ground connection, electric capacity C72 other end ground connection, the resistance R103 other end are connected with+14V power supplys, control core Piece U3 CS/SS ports are connected with SS ports, and control chip U3 AOUT ports are connected with PWM-A ports, control chip U3's BOUT ports are connected with PWM-B ports, and control chip U3 CT ports are divided into two-way, respectively one end with electric capacity C9, triode Q2 base stage is connected, and electric capacity C9 other end ground connection, triode Q2 colelctor electrode is connected with VREF ports, triode Q2 transmitting Pole is connected with resistance R86 one end, and control chip U3 CS+ ports are divided into three tunnels, respectively one end with resistance R88, resistance R86 The other end, resistance R7 one end is connected, and resistance R88 other end ground connection, the resistance R7 other end is divided into two-way, respectively with electricity Resistance R95 one end, electric capacity C36 one end is connected, electric capacity C36 other end ground connection, resistance the R95 other end and CT ports phase Even, CT ports are also divided into six tunnels, respectively one end with resistance R90, resistance R53 one end, resistance R37 one end, resistance R55 One end, diode D8 one end, diode D9 one end are connected, the resistance R90 other end and FET T14 drain electrode phase Even, FET T14 gate pole is connected with TIG1/MMA0 ports, and FET T14 source ground, diode D9's is another End is divided into two-way, and No. 1 port with mainboard CT1 ports, diode D10 one end are connected respectively, the diode D8 other end point For two-way, one end with diode D11, No. 2 ports of mainboard CT1 ports are connected respectively, and the resistance R37 other end is divided into four Road, respectively the other end with resistance R55, the diode D11 other end, the diode D10 other end, ground be connected, control core Piece U3 CS- ports ground connection, control chip U3 RT ports are divided into two-way, respectively one end with resistance R105, the one of resistance R87 End is connected, and resistance R87 other end ground connection, the resistance R105 other end is connected with FET T4 drain electrode, FET T4 gate pole is connected with FTJ ports, FET T4 source ground.