CN203426573U - Main loop of inverter pulse variable polarity TIG welding power source - Google Patents
Main loop of inverter pulse variable polarity TIG welding power source Download PDFInfo
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- CN203426573U CN203426573U CN201320528615.2U CN201320528615U CN203426573U CN 203426573 U CN203426573 U CN 203426573U CN 201320528615 U CN201320528615 U CN 201320528615U CN 203426573 U CN203426573 U CN 203426573U
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Abstract
The utility model discloses a main loop of an inverter pulse variable polarity TIG welding power source. The main loop is of a full-bridge double-inverter structural mode, and comprises an alternating current contactor provided with a power source connection end, an input rectification filter module connected to the output end of the alternating current contactor, an output rectification filter module connected to a primary inverter module, and a protection circuit. The output end of the input rectification filter module is connected to the primary inverter module which is connected with a primary drive module. The output end of the output rectification filter module is connected with a secondary inverter module which is connected with a secondary drive module. The protection circuit is connected to the primary drive module and the secondary drive module. The protection circuit is connected with a control circuit. The control circuit is connected with a voltage detection module and a current detection module which are arranged in the secondary inverter module. The secondary inverter module is connected to an electric arc load. According to the main loop of the inverter pulse variable polarity TIG welding power source, the zero crossing speed of a current is high, stability of an electric arc is facilitated, positive and negative half-wave amplitude and time of the current can be adjusted independently, and under the situation of forming the good negative electrode atomizing, burning loss of a tungsten electrode can be reduced to the maximum extent, and a good welding process is formed.
Description
Technical field
The utility model relates to a kind of major loop of contravariant pulsed variable polarity output TIG weldering power supply.
Background technology
Tungsten electrode argon-arc welding electric arc flameholding, has that weldquality is good, the intensity of welding point and a high feature of plasticity, therefore in industry, obtains a wide range of applications.
Aluminium and aluminium alloy have higher specific strength and thermal conductivity, good corrosion resistance and can keep the good features such as mechanical property at low temperatures, the needs that adapt to modern science and technology and high-new engineering development, become one of important structural material of the industry such as aerospace, chemical industry, communications and transportation.But when aluminium and Welded, in aluminium and aluminum alloy surface, always generate one deck strong adhesion and (fusing point is 2050 ℃) infusibility oxide-film (main component is Al2O3), this layer of oxide-film is insoluble to metal and obstruction is melted filling wetting metal, before welding, needs its removal.Therefore to have negative electrode atomizing (removing oxide-film) concurrently when aluminium and alloyed tungsten electrode argon arc welding thereof and reduce the requirement of the overheated scaling loss of tungsten electrode, generally adopt ac tungsten inert gases welding (TIG).
While adopting AC-TIG WELDING weldering weldering aluminium and alloy thereof, due to the polar cycle of alternating current change, so be equivalent to half-wave in each cycle, be straight polarity direct current, another half-wave is DC reverse connection.During the half-wave just connecing, tungsten electrode is for negative, can launch enough electronics and is unlikely to overheated, prevents its scaling loss, can also carry larger current capacity, is conducive to the stable of welding arc, and increases the welded thickness of workpiece.During the half-wave of reversal connection, aluminium sheet is for negative, and the oxide-film of its Surface Creation is easy to cleaned fall and obtains surface aesthetic, light, the good weld seam of moulding.Taken into account the requirement that negative electrode atomizing and tungsten electrode scaling loss reduce like this, simultaneously.But not fully up to expectations in the problem that whether can independently regulate in arc stability and positive and negative half wave amplitude of electric current and time, and cannot accomplish to reduce to greatest extent tungsten electrode scaling loss.
Utility model content
The purpose of this utility model is exactly in order to address the above problem, and a kind of major loop of contravariant pulsed variable polarity output TIG weldering power supply is provided.
The major loop of contravariant pulsed variable polarity output TIG weldering power supply of the present invention has adopted two inverter structure forms.The circuit form of a Converting Unit employing is full-bridge type topological structure, and its major function is to realize the constant current output welding external characteristics of argon tungsten-arc welding power supply and the dynamic characteristic of power supply.Secondary inverting part can adopt half-bridge or full bridge structure form, and its major function is to be the adjustable square wave alternating-current of amplitude (Variable Polarity) output the level and smooth DC inversion of a Converting Unit output.The two inverter structure of full-bridge for contravariant pulsed variable polarity output TIG weldering power acquisition that the present invention is designed.
To achieve these goals, the utility model adopts following technical scheme:
The major loop of contravariant pulsed variable polarity output TIG weldering power supply, it is characterized in that, it adopts the two inverter structure forms of full-bridge, the major loop of contravariant pulsed variable polarity output TIG weldering power supply comprises inverter main circuit twice, twice inverter main circuit is by the A.C. contactor connecting successively (1), input rectifying filtration module (2), an inversion module (3), output rectification filter module (4), secondary inverting module (5) forms, wherein, an inversion module (3) is connected with an inversion driver module (6), secondary inverting module is connected with secondary inverting driver module (7), once described, secondary inverting driver module is connected in holding circuit (8), the control circuit that described holding circuit connects (9) is connected to the voltage detection module (10) that is arranged on secondary inverting module output, current detection module (11).
In twice inverter main circuit, one time inverter main circuit comprises input rectifying filter circuit, full bridge inversion circuit, the output rectifier and filter sequentially connecting;
Described input rectifying filter circuit, it adopts three-phase full-controlled rectifier bridge (M1), and after three-phase full-controlled rectifier bridge (M1), is parallel with electrochemical capacitor (C1, C2, C3, C4);
Full bridge inversion circuit, it comprises IGBT power switch pipe one, two, three, four (VT1, VT2, VT3, VT4), diode one, two, three, four (VD1, VD2, VD3, VD4), electric capacity one, two, three, four (VC1, VC2, VC3, VC4), resistance one, two, three, four (R1, R2, R3, R4), diode seven, eight, nine, ten (D7, D8, D9, D10) and intermediate-frequency transformer (T1), diode one, two, three, four (VD1, VD2, VD3, VD4) respectively with IGBT power switch pipe one, two, three, four (VT1, VT2, VT3, VT4) reverse parallel connection, electric capacity one, two, three, four (VC1, VC2, VC3, VC4) respectively with resistance one, two, three, four (R1, R2, R3, R4) series connection after more respectively with diode one, two, three, four (VD1, VD2, VD3, VD4) parallel connection, diode seven, eight, nine, ten (D7, D8, D9, D10) respectively with resistance one, two, three, four (R1, R2, R3, R4) parallel connection,
Output rectifier and filter, it is with centre tapped full-wave rectifying circuit, commutation diode is fast recovery diode (D11, D12), adopts inductance (L1) as output filter.
In twice inverter main circuit, secondary inverting main circuit comprises: fly-wheel diode five, six, seven, eight (VD5, VD6, VD7, VD8), output capacitance five, six, seven, eight (VC5, VC6, VC7, VC8), IGBT power switch pipe five, six, seven, eight (VT5, VT6, VT7, VT8), buffer capacitor (C5), loop inductance (L2), electric arc equivalent resistance (R5), IGBT power switch pipe five, six, seven, eight (VT5, VT6, VT7, VT8), fly-wheel diode five, six, seven, eight (VD5, VD6, VD7, VD8) respectively with IGBT power switch pipe five, six, seven, eight (VT5, VT6, VT7, VT8) reverse parallel connection, output capacitance five, six, seven, eight (VC5, VC6, VC7, VC8) respectively with IGBT power switch pipe five, six, seven, eight (VT5, VT6, VT7, VT8) parallel connection, IGBT power switch pipe five, seven circuit one (A) that form and IGBT power switch pipe six, eight circuit two (B) that form have loop inductance (L2) and the electric arc equivalent resistance (R5) of series connection successively before, described buffer capacitor (C5) is in parallel with circuit one (A), and whole secondary inverting main circuit is serially connected with the output inductor (L1) of an inverter main circuit.
The utlity model has following beneficial effect:
The major loop main circuit of contravariant pulsed variable polarity output TIG weldering power supply of the present invention, current over-zero speed is conducive to arc stability soon; Positive and negative half wave amplitude of electric current and time all can independently regulate, in the situation that form good negative electrode atomizing, can reduce to greatest extent tungsten electrode scaling loss, form good welding process.
Pulsed variable polarity output argon tungsten-arc welding is the arc welding method of a kind of desirable aluminium and alloy thereof, can significantly improve the arc welding quality of aluminum alloy materials, fundamentally break through and solved a difficult problem for eager hope solution in practical engineering application, alternative traditional argon arc welding technique, significantly improve China's national defense military affairs, Aeronautics and Astronautics industry on the basis of performance arc welding technology intrinsic advantage in, the welding quality of some special construction material and key components and parts structure, will have important engineering using value and popularizing application prospect.
Accompanying drawing explanation
Fig. 1 is contravariant pulsed variable polarity output TIG power-supply system block diagram.
Fig. 2 is an inverter main circuit structure chart.
Fig. 3 is secondary inverting main circuit structure figure.
The current waveform figure of output when Fig. 4 is the use of contravariant pulsed variable polarity output TIG weldering power supply.
Description of reference numerals:
1. A.C. contactor; 2. input rectifying filtration module; 3. an inversion module; 4. output rectification filter module; 5. secondary inverting module; 6. an inversion driver module; 7. secondary inverting driver module; 8. holding circuit; 9. control circuit; 10. voltage detection module; 11. current detection modules; M1. three-phase full-controlled rectifier bridge; Common commutation diode/the Ultrafast recovery diode of D1～D6. (FRED); C1～C4. electrochemical capacitor; VT1～VT8.IGBT power switch pipe one～eight; VD1～VD4. diode one～tetra-; VC1～VC4. electric capacity one～tetra-; R1～R4. resistance one～tetra-; D7～D10. diode seven～ten; T1. intermediate-frequency transformer; D11, D12. fast recovery diode; L1. inductance; VD5～VD8. fly-wheel diode five～eight; VC5～VC8. output capacitance five～eight; C5. buffer capacitor; L2. loop inductance; R5. electric arc equivalent resistance.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
In literary composition, "/" represents the implication of "or".
As shown in Figure 1, the major loop of contravariant pulsed variable polarity output TIG weldering power supply, it adopts the two inverter structure forms of full-bridge, the major loop of contravariant pulsed variable polarity output TIG weldering power supply comprises inverter main circuit twice, twice inverter main circuit is by the A.C. contactor 1 connecting successively, input rectifying filtration module 2, an inversion module 3, output rectification filter module 4, secondary inverting module 5 forms, wherein, one time inversion module 3 is connected with inversion driver module 6 one time, secondary inverting module is connected with secondary inverting driver module 7, once described, secondary inverting driver module is connected in holding circuit 8, the control circuit 9 that described holding circuit connects is connected to the voltage detection module 10 that is arranged on secondary inverting module output, current detection module 11, at whole major loop end, be connected to arc load.
Referring to Fig. 2, in twice inverter main circuit, one time inverter main circuit comprises input rectifying filter circuit, full bridge inversion circuit, the output rectifier and filter sequentially connecting, incoming transport contactor before input rectifying filter circuit, the circuit form of a Converting Unit employing is full-bridge type topological structure, and major function is to realize the constant current output welding external characteristics of argon tungsten-arc welding power supply and the dynamic characteristic of power supply;
Described input rectifying filter circuit can be rectified into the industrial-frequency alternating current of electrical network the direct current of one pulsation.The design adopts three-phase full-controlled rectifier bridge M1, and after be parallel with electrochemical capacitor C1, C2, C3, C4, D1～D6 is common commutation diode, be interconnected into mutually three-phase full-controlled rectifier bridge, if substituting common commutation diode with Ultrafast recovery diode (FRED) also can, wherein, electrochemical capacitor C1 and electrochemical capacitor C2 form parallel circuit one, electrochemical capacitor C3 and electrochemical capacitor C4 formation di-, the circuit that parallel circuit one, two forms after connecting is again in parallel access in power output circuit again.Adopt jumbo electrochemical capacitor to carry out filtering, with the direct current ripple that reaches inverter circuit requirement input circuit and the provide little requirement of will trying one's best.It is that the inverter of device for power switching carries out after frequency-conversion processing for giving IGBT that whole welding machine adopts three-phase alternating current 380V voltage after three-phase bridge rectification, filtering, by intermediate-frequency transformer step-down.
Full bridge inversion circuit, it comprises IGBT power switch pipe one, two, three, four VT1, VT2, VT3, VT4, diode one, two, three, four VD1, VD2, VD3, VD4, electric capacity one, two, three, four VC1, VC2, VC3, VC4, resistance one, two, three, four R1, R2, R3, R4, diode seven, eight, nine, ten D7, D8, D9, D10 and intermediate-frequency transformer T1, diode one, two, three, four VD1, VD2, VD3, VD4 respectively with IGBT power switch pipe one, two, three, four VT1, VT2, VT3, VT4 reverse parallel connection, it is in order to bear reversing the current that load produces with protection IGBT power switch pipe.It is in parallel with diode one, two, three, four VD1, VD2, VD3, VD4 respectively again after electric capacity one, two, three, four VC1, VC2, VC3, VC4 connect with resistance one, two, three, four R1, R2, R3, R4 respectively, diode seven, eight, nine, ten D7, D8, D9, D10 are in parallel with resistance one, two, three, four R1, R2, R3, R4 respectively, introduce buffering (absorptions) link and can avoid IGBT power switch pipe when turn-offing, to produce the turn-off power loss of too high rate of voltage rise (du/dt) and minimizing IGBT power switch pipe.In circuit when normal operation,, two the IGBT power switch pipes (VT1 and VT4 or VT2 and VT3) on brachium pontis opposite side are turn-on and turn-off simultaneously, and two pairs of IGBT power switch pipes (VT1, VT4 or VT2, VT3) on opposite side break-make alternately, phase difference is 108 °.When driving pulse performance is well in turn during the IGBT of the two teams power switch pipe on drive axle opposite side, the medium frequency alternating current that inverter main circuit is converted to 20kHz high direct voltage (about 540V) is sent to intermediate-frequency transformer, sends into output rectifier and filter after step-down.
The direct current that output rectifier and filter is is pulsation by the current commutates of intermediate-frequency transformer Secondary Winding output, the intermediate-frequency transformer Secondary Winding that the present invention adopts is with centre tapped full-wave rectifying circuit, commutation diode is fast recovery diode D11, fast recovery diode D12, adopt inductance L 1 as output filter, the Rectified alternating current after rectification is carried out to smothing filtering.
Referring to Fig. 3, secondary inverting part can adopt half-bridge or full bridge structure form (full bridge structure form is selected in this case), be to be mainly the adjustable square wave alternating-current of amplitude (Variable Polarity) output the level and smooth DC inversion of a Converting Unit output, frequency, the positive and negative half-wave ON time of the final output current of pulsation Variable Polarity TIG weldering power supply are determined by secondary inverting part.In twice inverter main circuit, adopt the secondary inverting main circuit of full bridge structure form to comprise: four fly-wheel diodes, it is respectively fly-wheel diode five VD5, fly-wheel diode six VD6, fly-wheel diode seven VD7, fly-wheel diode eight VD8, four output capacitances, it is respectively output capacitance five VC5, output capacitance six VC6, output capacitance seven VC7, output capacitance eight VC8, four IGBT power switch pipes that participate in commutation, it is respectively IGBT power switch pipe five VT5, IGBT power switch pipe six VT6, IGBT power switch pipe seven VT7, IGBT power switch pipe eight VT8, buffer capacitor C5, loop inductance L2, electric arc equivalent resistance R5, four IGBT power switch pipes respectively reverse parallel connection have fly-wheel diode, and IGBT power switch pipe is also parallel with output capacitance, here, four fly-wheel diodes five～eight (VD5-VD8) and four output capacitances five～eight (VC5-VC8) are respectively reverse parallel connection fly-wheel diode and the output capacitance that module carries, IGBT power switch pipe five, circuit one A and IGBT power switch pipe six that IGBT power switch pipe seven forms, loop inductance L2 and the electric arc equivalent resistance R5 before circuit two B that IGBT power switch pipe eight forms with series connection successively, described buffer capacitor C5 is in parallel with circuit one A, whole secondary inverting main circuit is serially connected with the output inductor L1 of an inverter main circuit, this partial circuit has prime constant-current source as we know from the figure.When IGBT power switch pipe five VT5 and the six VT6 conducting of IGBT power switch pipe, the eight VT8 cut-offs of IGBT power switch pipe seven VT7 and IGBT power switch pipe, now workpiece connect negative, power supply output polarity DCEP; When IGBT power switch pipe five VT5 and the six VT6 cut-off of IGBT power switch pipe, IGBT power switch pipe seven VT7 and the eight VT8 conductings of IGBT power switch pipe, now workpiece just connects, power supply output polarity DCEN, two groups of mutual alternate conduction of IGBT power switch pipe, provide positive and negative half-wave current to electric arc, and when the IGBT power switch pipe in secondary inverting main circuit commutates, voltage is relatively low, electric current is larger, and commutating frequency is also low.
Referring to Fig. 4, contravariant pulse editor property TIG welds power supply, and it is a kind of special square wave alternating-current TIG weldering, is the tungsten argon arc soldering method that a kind of output current frequency, dutycycle, positive and negative half-wave ON time and amplitude all can independently regulate.When contravariant pulsed variable polarity output TIG weldering power supply is used, the current waveform figure of output is referring to Fig. 4.
The structure of not setting forth in literary composition can prior art be achieved.
Claims (3)
1. contravariant pulsed variable polarity output TIG welds the major loop of power supply, it is characterized in that, it adopts the two inverter structure forms of full-bridge, the major loop of contravariant pulsed variable polarity output TIG weldering power supply comprises inverter main circuit twice, twice inverter main circuit is by the A.C. contactor connecting successively (1), input rectifying filtration module (2), an inversion module (3), output rectification filter module (4), secondary inverting module (5) forms, wherein, an inversion module (3) is connected with an inversion driver module (6), secondary inverting module is connected with secondary inverting driver module (7), once described, secondary inverting driver module is connected in holding circuit (8), the control circuit that described holding circuit connects (9) is connected to the voltage detection module (10) that is arranged on secondary inverting module output, current detection module (11).
2. contravariant pulsed variable polarity output TIG according to claim 1 welds the major loop of power supply, it is characterized in that, in twice inverter main circuit, one time inverter main circuit comprises input rectifying filter circuit, full bridge inversion circuit, the output rectifier and filter sequentially connecting;
Described input rectifying filter circuit, it adopts three-phase full-controlled rectifier bridge (M1), and after three-phase full-controlled rectifier bridge (M1), is parallel with electrochemical capacitor (C1, C2, C3, C4);
Full bridge inversion circuit, it comprises IGBT power switch pipe one, two, three, four (VT1, VT2, VT3, VT4), diode one, two, three, four (VD1, VD2, VD3, VD4), electric capacity one, two, three, four (VC1, VC2, VC3, VC4), resistance one, two, three, four (R1, R2, R3, R4), diode seven, eight, nine, ten (D7, D8, D9, D10) and intermediate-frequency transformer (T1), diode one, two, three, four (VD1, VD2, VD3, VD4) respectively with IGBT power switch pipe one, two, three, four (VT1, VT2, VT3, VT4) reverse parallel connection, electric capacity one, two, three, four (VC1, VC2, VC3, VC4) respectively with resistance one, two, three, four (R1, R2, R3, R4) series connection after more respectively with diode one, two, three, four (VD1, VD2, VD3, VD4) parallel connection, diode seven, eight, nine, ten (D7, D8, D9, D10) respectively with resistance one, two, three, four (R1, R2, R3, R4) parallel connection,
Output rectifier and filter, it is with centre tapped full-wave rectifying circuit, commutation diode is fast recovery diode (D11, D12), adopts inductance (L1) as output filter.
3. the major loop of contravariant pulsed variable polarity output TIG weldering power supply according to claim 1, is characterized in that, in twice inverter main circuit, secondary inverting main circuit comprises: fly-wheel diode five, six, seven, eight (VD5, VD6, VD7, VD8), output capacitance five, six, seven, eight (VC5, VC6, VC7, VC8), IGBT power switch pipe five, six, seven, eight (VT5, VT6, VT7, VT8), buffer capacitor (C5), loop inductance (L2), electric arc equivalent resistance (R5), fly-wheel diode five, six, seven, eight (VD5, VD6, VD7, VD8) respectively with IGBT power switch pipe five, six, seven, eight (VT5, VT6, VT7, VT8) reverse parallel connection, output capacitance five, six, seven, eight (VC5, VC6, VC7, VC8) respectively with IGBT power switch pipe five, six, seven, eight (VT5, VT6, VT7, VT8) parallel connection, IGBT power switch pipe five, seven circuit one (A) and IGBT power switch pipe six in series, eight circuit two (B) that form have loop inductance (L2) and the electric arc equivalent resistance (R5) of series connection successively before, described buffer capacitor (C5) is in parallel with circuit one (A), and whole secondary inverting main circuit is serially connected with the output inductor (L1) of an inverter main circuit.
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| CN201320528615.2U CN203426573U (en) | 2013-08-28 | 2013-08-28 | Main loop of inverter pulse variable polarity TIG welding power source |
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| CN201320528615.2U CN203426573U (en) | 2013-08-28 | 2013-08-28 | Main loop of inverter pulse variable polarity TIG welding power source |
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| CN103856092A (en) * | 2014-02-21 | 2014-06-11 | 清华大学 | Secondary inversion recrudescence arc voltage generating circuit of polarity-changing welding power supply and application of secondary inversion recrudescence arc voltage generating circuit |
| CN103978281A (en) * | 2014-04-15 | 2014-08-13 | 刘文斌 | Welding equipment with multiple load output modes |
| CN107309528A (en) * | 2017-04-24 | 2017-11-03 | 四川玛瑞焊业发展有限公司 | The double arc digitlization submerged arc welding electric powers of mariages |
| CN107317505A (en) * | 2017-07-07 | 2017-11-03 | 吴忠市中心电焊机有限公司 | A kind of two-way full bridge inverter for being applicable twin voltage automatic conversion |
| CN108646207A (en) * | 2018-05-31 | 2018-10-12 | 国网电力科学研究院武汉南瑞有限责任公司 | Direct current measuring devices current step standard source experimental rig and method |
| CN109954956A (en) * | 2019-03-21 | 2019-07-02 | 浙江肯得机电股份有限公司 | A kind of IGBT inversion hand arc welding machine and its circuit structure |
| CN110064817A (en) * | 2019-05-29 | 2019-07-30 | 华南理工大学 | Fast frequency pulse TIG welding connects power supply low-and high-frequency energy conversion and compound circuit |
| CN110102858A (en) * | 2019-05-29 | 2019-08-09 | 华南理工大学 | The asymmetric absorbing circuit of power supply peak voltage is connect for fast frequency pulse TIG welding |
| CN111545882A (en) * | 2020-05-19 | 2020-08-18 | 北京工业大学 | Arc energy adjusting device and method |
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| CN103856092A (en) * | 2014-02-21 | 2014-06-11 | 清华大学 | Secondary inversion recrudescence arc voltage generating circuit of polarity-changing welding power supply and application of secondary inversion recrudescence arc voltage generating circuit |
| CN103978281A (en) * | 2014-04-15 | 2014-08-13 | 刘文斌 | Welding equipment with multiple load output modes |
| CN103978281B (en) * | 2014-04-15 | 2016-01-27 | 刘文斌 | A kind of welding equipment with multiple load output mode |
| US11618096B2 (en) | 2015-04-15 | 2023-04-04 | Jattus LLC | External pulse generating device and method |
| US10766087B2 (en) | 2015-04-15 | 2020-09-08 | Jattus LLC | External pulse generating device and method |
| CN107309528A (en) * | 2017-04-24 | 2017-11-03 | 四川玛瑞焊业发展有限公司 | The double arc digitlization submerged arc welding electric powers of mariages |
| CN107317505A (en) * | 2017-07-07 | 2017-11-03 | 吴忠市中心电焊机有限公司 | A kind of two-way full bridge inverter for being applicable twin voltage automatic conversion |
| CN107317505B (en) * | 2017-07-07 | 2023-10-27 | 吴忠市中心电焊机有限公司 | Be suitable for double-circuit full-bridge inverter circuit of two voltage automatic switching |
| CN108646207A (en) * | 2018-05-31 | 2018-10-12 | 国网电力科学研究院武汉南瑞有限责任公司 | Direct current measuring devices current step standard source experimental rig and method |
| CN109954956A (en) * | 2019-03-21 | 2019-07-02 | 浙江肯得机电股份有限公司 | A kind of IGBT inversion hand arc welding machine and its circuit structure |
| CN109954956B (en) * | 2019-03-21 | 2023-12-12 | 浙江肯得机电股份有限公司 | IGBT inversion manual arc welder and circuit structure thereof |
| CN110102858A (en) * | 2019-05-29 | 2019-08-09 | 华南理工大学 | The asymmetric absorbing circuit of power supply peak voltage is connect for fast frequency pulse TIG welding |
| CN110064817A (en) * | 2019-05-29 | 2019-07-30 | 华南理工大学 | Fast frequency pulse TIG welding connects power supply low-and high-frequency energy conversion and compound circuit |
| CN111545882A (en) * | 2020-05-19 | 2020-08-18 | 北京工业大学 | Arc energy adjusting device and method |
| CN113727483B (en) * | 2021-09-02 | 2022-12-20 | 合肥爱普利等离子体有限责任公司 | Multi-electrode alternating current arc discharge device, equipment and alternating current power supply |
| CN113727483A (en) * | 2021-09-02 | 2021-11-30 | 合肥爱普利等离子体有限责任公司 | Multi-electrode alternating current arc discharge device, equipment and alternating current power supply |
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