CN106392387A - Multifunctional welding circuit of double-tube single-ended forward inverter welding machine - Google Patents

Multifunctional welding circuit of double-tube single-ended forward inverter welding machine Download PDF

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Publication number
CN106392387A
CN106392387A CN201610888054.5A CN201610888054A CN106392387A CN 106392387 A CN106392387 A CN 106392387A CN 201610888054 A CN201610888054 A CN 201610888054A CN 106392387 A CN106392387 A CN 106392387A
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Prior art keywords
connects
winding
circuit
diode
welding
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CN201610888054.5A
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CN106392387B (en
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崔正永
李述辉
徐德进
陈绪强
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SHANGHAI GREATWAY WELDING EQUIPMENT Co Ltd
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SHANGHAI GREATWAY WELDING EQUIPMENT Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006—Power supply
    • B23K9/1043—Power supply characterised by the electric circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
    • B23K28/02—Combined welding or cutting procedures or apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Power Engineering (AREA)
  • Optics & Photonics (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Arc Welding Control (AREA)

Abstract

The invention provides a multifunctional welding circuit of a double-tube single-ended forward inverter welding machine. The multifunctional welding circuit comprises a double-tube single-ended forward topology circuit, a first secondary rectification output circuit, a second secondary rectification output circuit and a high-frequency arc striking inductor, wherein the double-tube single-ended forward topology circuit comprises a primary winding N1 of a transformer; the first secondary rectification output circuit comprises a secondary winding N2 of the transformer; the second secondary rectification output circuit comprises a secondary winding N3 of the transformer; the primary winding N1 is coupled with the secondary winding N2 and the secondary winding N3; the first secondary rectification output circuit is coupled with the second secondary rectification output circuit through the high-frequency arc striking inductor. According to the multifunctional welding circuit, the two output windings on the secondary side of the transformer constitute an independent output circuit, so that MMA welding, TIG welding and current output under an air plasma cutting condition are not affected mutually.

Description

Two-tube single-ended forward type inverter type welder realizes the circuit of multi-functional welding
Technical field
The present invention relates to inversion welding machine circuit, in particular it relates to a kind of two-tube single-ended forward type inverter type welder realization is many The circuit of function welding.
Background technology
Process with national development and technicalization and industrialized development, electric welding machine is widely used in building row Industry, manufacturing, mechanical processing industry, are indispensable equipments.With the maturation of IGBT technology, in the last few years, IBGT is inverse Become welding machine to have obtained quick developing and being widely applied.IGBT inverter type welder on the market is a lot of at present, according to using different Topological circuit structure can be divided into full-bridge inverting welding machine, semi-bridge inversion welding machine and two-tube single-end ortho-exciting inverter type welder.According to The difference of welding procedure, different topological circuit structures have ripe single MMA craft welding machine, TIG TIG Welding Machine, Plasma air plasma is cut machine and is widely used.Change with global industryization forward direction low-carbon (LC), environmental protection and economizing type, become This is low, small volume, lightweight and dependable performance double tube positive exciting formula topological structure inverter type welder are shown one's talent.
It is all single welding function in existing double tube positive exciting formula topological structure inverter type welder at present, also not simultaneously Realize MMA manual welding, TIG argon arc welding and the different welding function of three kinds of Plasma plasma cut in the welding machine of one.One machine Multiplex not only bring conveniently to user, and greatly reduce the input cost of welding equipment.
Due to the difference of welding procedure characteristic, MMA manual welding, TIG argon tungsten-arc welding use the side of transformer pressure-reducing The welding of low-voltage and high-current realized by the reactor that formula obtains 60-80V voltage and small sensible weight, and Plasma Air low-temperature plasma It is little that machine then needs the reactor that the mode using transformer boost obtains 300V-500V voltage and big sensibility reciprocal to realize high voltage The cutting of electric current.Three functions are combined on a machine it is necessary to the secondary side of main transformer is under different functional modes It is operated in step-down or the state of boosting；Output reactance device is operated under little sensibility reciprocal and big sensibility reciprocal；And output rectification is fast Recovery diode is operated in the case of low pressure and high withstand voltage to realize different welding functions.
The technology that existing multifunctional welding machine uses is full-bridge inverting topological circuit mechanism, in order to realize manual welding, TIG weldering And cutting function, by the way of main transformer is in parallel using two, pass through relay switching transformer under different functional modes What secondary windings realized winding obtains low-voltage and high-current, high voltage small current in parallel and serial；Output is switched by relay What winding realized by the multi cord of reactor obtains small sensible weight high current, high sensibility reciprocal small current in parallel and serial；Cut by relay That changes that output fast recovery diode realizes diode obtains low pressure high current and high withstand voltage small current in parallel and serial.Existing Technology is mainly passed through welding machine secondary side and is realized difference in functionality using relay switching, is therefore also limited by relay.Universal MMA Manual welding, TIG argon tungsten-arc welding output current are done less if it is desired to do high current, then relay will be bigger, so whole The cost of individual machine and volume will significantly increase.Therefore can only using the relay of 40A do Plasma air etc. from Export 40A electric current under sub- cutting machine state, and output current is merely able to export under MMA manual welding, TIG argon tungsten-arc welding state 140A.Furthermore, because using such technical scheme, the fault rate of machine also increases.
Accordingly, it would be desirable to welding output current is limited to relay rated current in solution prior art, relay quantity is many, The many circuit in contact are complicated, and MMA manual welding, TIG argon tungsten-arc welding output current are done less, and circuit cost is high and machine-spoiled rate is high The problems such as.
Content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of two-tube single-ended forward type inverter type welder is realized The circuit of multi-functional welding.Circuit Fault on Secondary Transformer adopts two output windings to constitute independent output loop so that MMA is manual Under weldering, TIG argon tungsten-arc welding and Plasma Air low-temperature plasma state, output current is unaffected mutually.In same Plasma Under Air low-temperature plasma output 40A current conditions, MMA manual welding, TIG argon tungsten-arc welding output current can reach 200A. Autonomous working is independent of each other.Substantially reduce welding machine cost, volume and fault rate.
Realize the circuit of multi-functional welding according to the two-tube single-ended forward type inverter type welder that the present invention provides, including two-tube list Rectify and swash topological circuit, the first secondary commutation output loop, second subprime rectification output loop and high-frequency arc strike inductance；
Wherein, described two-tube single-end ortho-exciting topological circuit includes the armature winding N1 of transformer, described first secondary commutation Output loop includes the secondary windings N2 of transformer, and described second subprime rectification output loop includes the secondary windings of transformer N3；Described armature winding N1 and described secondary windings N2, described secondary windings N3 couple；Described first secondary commutation output loop Coupled with described second subprime rectification output loop by described high-frequency arc strike inductance；
Described two-tube single-end ortho-exciting topological circuit is used for by armature winding N1 to described first secondary commutation output loop Input electric energy with described second subprime rectification output loop；Described first secondary commutation output loop is used for MMA manual welding and TIG Argon tungsten-arc welding；Described second subprime rectification output loop is used for coordinating described first secondary commutation output loop to carry out Plasma Air low-temperature plasma.
Preferably, described two-tube single-end ortho-exciting topological circuit also includes IGBT switching tube Q1, IGBT switching tube Q2, afterflow two Pole pipe D1, sustained diode 2 and power supply；
Wherein, the source electrode of IGBT switching tube Q1 connects positive source, and the drain electrode of IGBT switching tube Q1 connects armature winding N1 One end, the armature winding N1 other end connect IGBT switching tube Q2 source electrode, the grounded drain of IGBT switching tube Q2；Afterflow two pole The plus earth of pipe D2, sustained diode 2 negative pole connects one end of armature winding N1, and the other end of described armature winding N1 continues The positive pole of stream diode D1, the negative pole of diode D1 connects positive source, the minus earth of power supply.
Preferably, described first secondary commutation output loop is just also including commutation diode D3, sustained diode 4, output End and weld load export negative terminal；Described high-frequency arc strike inductance includes winding N5；
One end of described secondary windings N2 connects the positive pole of described commutation diode D3, the negative pole of described commutation diode D3 Connect described output plus terminal, the positive pole of described sustained diode 4 connects the other end of described secondary windings N2, negative pole connects institute State output plus terminal；The other end of described secondary windings N2 connects described weld load by described winding N5 and exports negative terminal.
Preferably, described second subprime rectification output loop also includes commutation diode D5, sustained diode 6, inductance L1 With broaching load and output negative terminal；Described high-frequency arc strike inductance also includes winding N6 and winding N4；Described winding N6, described winding N4 is coupled with described winding N5；
Wherein, one end of described secondary windings N3 connects the positive pole of commutation diode D5, and the negative pole of commutation diode D5 is even Connect described output plus terminal；The other end of described secondary windings N3 connects one end of the switch portion of described relay K1, described switch The other end in portion passes sequentially through described inductance L1, described winding N6 and connects described broaching load and output negative terminal；Described afterflow two The positive pole of pole pipe D6 connects the other end of described switch portion, and negative pole connects described output plus terminal.
Preferably, the gate pole of described IGBT switching tube Q1 and described IGBT switching tube Q2 is used for inputting pwm pulse.
Compared with prior art, the present invention has following beneficial effect：
1st, in the present invention, the secondary side of transformer adopts two output windings to constitute independent output loop so that MMA hand Under work weldering, TIG argon tungsten-arc welding and Plasma Air low-temperature plasma state, output current is unaffected mutually；
2nd, in the present invention under same Plasma Air low-temperature plasma output 40A current conditions, MMA manual welding, TIG tungsten Electrode argon arc welding output current can reach 200A, and autonomous working is independent of each other；
3rd, the present invention substantially reduces welding machine cost, volume and fault rate.
Brief description
The detailed description with reference to the following drawings, non-limiting example made by reading, the further feature of the present invention, Objects and advantages will become more apparent upon：
Fig. 1 is the structural representation of the present invention.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area For personnel, without departing from the inventive concept of the premise, some deformation can also be made and improve.These broadly fall into the present invention Protection domain.
In the present embodiment, the two-tube single-ended forward type inverter type welder that the present invention provides realizes the circuit of multi-functional welding, Draw including two-tube single-end ortho-exciting topological circuit, the first secondary commutation output loop, second subprime rectification output loop and high frequency Arc inductance；Wherein, described two-tube single-end ortho-exciting topological circuit includes the armature winding N1 of transformer, and described first secondary commutation is defeated Go out the secondary windings N2 that loop includes transformer, described second subprime rectification output loop includes the secondary windings N3 of transformer； Described armature winding N1 and described secondary windings N2, described secondary windings N3 couple；Described first secondary commutation output loop leads to Cross described high-frequency arc strike inductance to couple with described second subprime rectification output loop；Described two-tube single-end ortho-exciting topological circuit is used for Electric energy is inputted to described first secondary commutation output loop and described second subprime rectification output loop by armature winding N1；Institute State the first secondary commutation output loop for MMA manual welding and TIG argon tungsten-arc welding；Described second subprime rectification output loop is used Carry out Plasma Air low-temperature plasma in coordinating described first secondary commutation output loop.
Described two-tube single-end ortho-exciting topological circuit also includes IGBT switching tube Q1, IGBT switching tube Q2, sustained diode 1, Sustained diode 2 and power supply；Wherein, the source electrode of IGBT switching tube Q1 connects positive supply, and the drain electrode of IGBT switching tube Q1 connects just One end of level winding N1, the armature winding N1 other end connects the source electrode of IGBT switching tube Q2, the grounded drain of IGBT switching tube Q2； The plus earth of sustained diode 2, sustained diode 2 negative pole connects one end of armature winding N1, and described armature winding N1's is another One end connects the positive pole of fly-wheel diode D1, and the negative pole of diode D1 connects positive source.The minus earth of power supply.Described IGBT switch The gate pole of pipe Q1 and described IGBT switching tube Q2 is used for inputting pwm pulse.
Described first secondary commutation output loop also includes commutation diode D3, sustained diode 4, output plus terminal and weldering Connect load output negative terminal；Described high-frequency arc strike inductance includes winding N5；One end of described secondary windings N2 connects described rectification two The positive pole of pole pipe D3, the negative pole of described commutation diode D3 connects described output plus terminal, and the positive pole of described sustained diode 4 is even Connect the other end of described secondary windings N2, negative pole connects described output plus terminal；The other end of described secondary windings N2 passes through described Winding N5 connects described weld load and exports negative terminal.
Described second subprime rectification output loop also includes commutation diode D5, sustained diode 6, inductance L1 and cutting Load and output negative terminal；Described high-frequency arc strike inductance also includes winding N6 and winding N4；Described winding N6, described winding N4 and institute State winding N5 coupling；Wherein, one end of described secondary windings N3 connects the positive pole of commutation diode D5, and commutation diode D5's is negative Pole connects described output plus terminal；The other end of described secondary windings N3 connects one end of the switch portion of described relay K1, described The other end of switch portion passes sequentially through described inductance L1, described winding N6 and connects described broaching load and output negative terminal；Described continuous The positive pole of stream diode D6 connects the other end of described switch portion, and negative pole connects described output plus terminal.
When the two-tube single-ended forward type inverter type welder providing using the present invention realizes the circuit of multi-functional welding, work as PWM Driving is opened in pulse simultaneously, and IGBT switching tube Q1 and IGBT switching tube Q2 simultaneously turn on, and electric current flows through IGBT switching tube Q1, transformation The armature winding N1 of device and IGBT switching tube Q2.In Circuit Fault on Secondary Transformer, described secondary windings N2 and described secondary windings N3 leads to Cross magnetic core of transformer coupling and obtain voltage, when pwm pulse simultaneously closes off driving, IGBT switching tube Q1 and IGBT switching tube Q2 are simultaneously Close, the electric energy that the armature winding N1 of transformer primary side continues needs to discharge by sustained diode 2, sustained diode 1 Fall.
When electric welding machine is operated under MMA or TIG function, relay K1 must not be electric, and switch portion disconnects, and secondary windings N3 is broken Open and do not constitute loop；When pwm pulse is opened, the electric energy of secondary windings N2 coupling needs to be transported to by commutation diode D3 defeated Go out anode, i.e. OUT+ end, weld load is exported by winding N5 and exports negative terminal, be i.e. A_OUT- end, thus constitute welding circuit；When When pwm pulse is closed, commutation diode D3 ends, and the electric energy of winding N5 storage is passed through sustained diode 4 and constituted with weld load Continuous current circuit.In said process, under MMA or TIG function, circuit can be regarded electric energy as and is coupled to secondary windings from armature winding N1 N2 exports negative terminal and welding through commutation diode D3 rectification, sustained diode 4, winding N5, output plus terminal and weld load again Load constitutes complete welding circuit.This process does not have relay to participate in completely, and circuit is simple, and output current size is solely dependent upon The number of parallel diode.
When electric welding machine is operated under Plasma Air low-temperature plasma function, relay K1 obtains electric, secondary windings N3 winding It is switched on composition loop, during pwm pulse unlatching, the electric energy that secondary side secondary windings N3 couples needs whole by commutation diode D5 Stream is given to output plus terminal (OUT+), and exports negative terminal (i.e. C_OUT- end) and winding N6 composition welding circuit by broaching load； When pwm pulse is closed, commutation diode D5 ends, and the electric energy of winding N6 and the storage of inductance L1 winding passes through sustained diode 6 Constitute continuous current circuit with weld load.Under Plasma Air low-temperature plasma function in said process circuit can regard as electric energy from Armature winding N1 is coupled to secondary windings N3 again through commutation diode D5 rectification, sustained diode 6, winding N4 afterflow supply Output plus terminal and broaching load output negative terminal, and then constitute complete cutting loop with broaching load.
Though this process has relay K1 to participate in, relay is only operate under cutting function, due to Plasma air etc. The high characteristic of the little output loading voltage of ion cutting function output current, a specified 40A relay just can meet requirement, fall Low circuit cost, volume and fault rate.Although this process secondary windings N2 is also in work, in Plasma air plasma Lower of cutting function uses OUT+ and C_OUT- output port, so N2 winding loop only has voltage but does not have output current to produce, Do not affect cutting current.High-frequency arc strike inductance is cleverly separated secondary with two groups of windings, using secondary windings under TIG function N2 welding circuit, during high-frequency arc strike, hf and hv pulse makes A_OUT- output port produce by winding N4 uncoupling winding N5 High-voltage breakdown welding protection gases argon forms ionization and forms welding circuit with OUT+.Using secondary windings under Plasma function N3 welding circuit, during high-frequency arc strike, hf and hv pulse makes C_OUT- output port produce by winding N4 uncoupling winding N6 High-voltage breakdown welding protection gas air forms ionization and forms cutting loop with OUT+.In sum, due to two output loops Independent separately, be independent of each other and disturb so that the output current of MMA and TIG do bigger, the cost of whole circuit significantly drops Low, the service life of machine is longer.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned Particular implementation, those skilled in the art can make various modifications or modification within the scope of the claims, this not shadow Ring the flesh and blood of the present invention.

Claims (5)

1. a kind of two-tube single-ended forward type inverter type welder realizes the circuit of multi-functional welding it is characterised in that including two-tube single-ended Forward topology circuit, the first secondary commutation output loop, second subprime rectification output loop and high-frequency arc strike inductance；
Wherein, described two-tube single-end ortho-exciting topological circuit includes the armature winding N1 of transformer, described first secondary commutation output Loop includes the secondary windings N2 of transformer, and described second subprime rectification output loop includes the secondary windings N3 of transformer；Institute State armature winding N1 and described secondary windings N2, described secondary windings N3 coupling；Described first secondary commutation output loop passes through Described high-frequency arc strike inductance is coupled with described second subprime rectification output loop；
Described two-tube single-end ortho-exciting topological circuit is used for by armature winding N1 to described first secondary commutation output loop and institute State second subprime rectification output loop input electric energy；Described first secondary commutation output loop is used for MMA manual welding and TIG tungsten electrode Argon arc welding；Described second subprime rectification output loop is used for coordinating described first secondary commutation output loop to carry out Plasma air Plasma cut.
2. two-tube single-ended forward type inverter type welder according to claim 1 realizes the circuit of multi-functional welding, and its feature exists In described two-tube single-end ortho-exciting topological circuit also includes IGBT switching tube Q1, IGBT switching tube Q2, sustained diode 1, afterflow Diode D2 and power supply；
Wherein, the source electrode of IGBT switching tube Q1 connects positive source, and the drain electrode of IGBT switching tube Q1 connects the one of armature winding N1 End, the armature winding N1 other end connects the source electrode of IGBT switching tube Q2, the grounded drain of IGBT switching tube Q2；Sustained diode 2 Plus earth, sustained diode 2 negative pole connects one end of armature winding N1, and the other end of described armature winding N1 continues stream two The positive pole of pole pipe D1, the negative pole of diode D1 connects positive source, the minus earth of power supply.
3. two-tube single-ended forward type inverter type welder according to claim 1 realizes the circuit of multi-functional welding, and its feature exists In described first secondary commutation output loop also includes commutation diode D3, sustained diode 4, output plus terminal and weld load Output negative terminal；Described high-frequency arc strike inductance includes winding N5；
One end of described secondary windings N2 connects the positive pole of described commutation diode D3, and the negative pole of described commutation diode D3 connects Described output plus terminal, the positive pole of described sustained diode 4 connects the other end of described secondary windings N2, and negative pole connects described defeated Go out anode；The other end of described secondary windings N2 connects described weld load by described winding N5 and exports negative terminal.
4. two-tube single-ended forward type inverter type welder according to claim 3 realizes the circuit of multi-functional welding, and its feature exists In, described second subprime rectification output loop also include commutation diode D5, sustained diode 6, inductance L1 and broaching load with Output negative terminal；Described high-frequency arc strike inductance also includes winding N6 and winding N4；Described winding N6, described winding N4 and described winding N5 couples；
Wherein, one end of described secondary windings N3 connects the positive pole of commutation diode D5, and the negative pole of commutation diode D5 connects institute State output plus terminal；The other end of described secondary windings N3 connects one end of the switch portion of described relay K1, described switch portion The other end passes sequentially through described inductance L1, described winding N6 and connects described broaching load and output negative terminal；Described fly-wheel diode The positive pole of D6 connects the other end of described switch portion, and negative pole connects described output plus terminal.
5. two-tube single-ended forward type inverter type welder according to claim 2 realizes the circuit of multi-functional welding, and its feature exists In the gate pole of described IGBT switching tube Q1 and described IGBT switching tube Q2 is used for inputting pwm pulse.
CN201610888054.5A 2016-01-27 2016-10-11 Two-tube single-ended forward type inverter type welder realizes the circuit of multi-functional welding Active CN106392387B (en)

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CN112548271A (en) * 2020-12-14 2021-03-26 上海威特力焊接设备制造股份有限公司 Automatic change multi-functional AC/DC welding machine of polarity
CN113631313A (en) * 2019-03-27 2021-11-09 创意***与设计有限责任公司 Multi-process welding and cutting machine

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CN109570698B (en) * 2019-01-02 2024-02-06 南通富力机电设备有限责任公司 Output circuit of inversion multifunctional welding machine and control method thereof
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CN107359796A (en) * 2017-07-17 2017-11-17 华南理工大学 A kind of dual input normal shock type Z sources DC voltage converter
CN107359796B (en) * 2017-07-17 2020-05-22 华南理工大学 Double-input forward Z-source direct-current voltage converter
CN113631313A (en) * 2019-03-27 2021-11-09 创意***与设计有限责任公司 Multi-process welding and cutting machine
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CN110190754B (en) * 2019-06-13 2024-05-03 深圳线易微电子有限公司 Converter control circuit and chip
CN112548271A (en) * 2020-12-14 2021-03-26 上海威特力焊接设备制造股份有限公司 Automatic change multi-functional AC/DC welding machine of polarity

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