CN205520010U - Be used for alternating current -direct current argon arc welding machine secondary inverter drive circuit - Google Patents
Be used for alternating current -direct current argon arc welding machine secondary inverter drive circuit Download PDFInfo
- Publication number
- CN205520010U CN205520010U CN201620065989.9U CN201620065989U CN205520010U CN 205520010 U CN205520010 U CN 205520010U CN 201620065989 U CN201620065989 U CN 201620065989U CN 205520010 U CN205520010 U CN 205520010U
- Authority
- CN
- China
- Prior art keywords
- circuit
- connects
- resistance
- diode
- outfan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Arc Welding Control (AREA)
Abstract
The utility model discloses a secondary inverter drive circuit, this secondary inverter drive circuit include: for alternating current -direct current argon arc welding machine triangular wave generating circuit for produce a triangular wave, chopper circuit, this chopper circuit connects this triangular wave generating circuit's output for export duty cycle adjustable square wave, delay circuit, this delay circuit connects this chopper circuit's output for the production has two way drive signal of a blind spot time.
Description
Technical field
This utility model relates to a kind of alternating current-direct current argon arc welding technical field, particularly relates to a kind of for AC-DC argon arc welding machine secondary inverting drive circuit.
Background technology
Argon arc welding i.e. tungsten inert-gas arc welding, refers to make nonconsumable electrode with industry tungsten or Porous Tungsten, and noble gas (argon) makees the welding method protected.The starting the arc of argon arc welding uses the starting the arc mode of high-voltage breakdown, and first in addition high-frequency and high-voltage between electrode needle (tungsten pin) and workpiece, punctures argon, be allowed to conduct electricity, then supply lasting electric current, it is ensured that arc stability.
One of fault that AC-DC argon arc welding machine is easiest to occur is exactly ac converter loop IGBT(Insulated Gate Bipolar Transistor insulated gate bipolar transistor) upper and lower bridge arm leads directly to.When power supply short circuit when bridge leads directly to up and down in ac converter loop easily causes aircraft bombing, and the switching loss every time exchanging commutation IGBT when carrying out AC welding is very big, not only affects the efficiency of welding machine but also reduces arcing time factor.
Utility model content
In order to overcome defect present in prior art, this utility model provides a kind of for AC-DC argon arc welding machine
Secondary inverting drive circuit, both can realize the protection to ac converter loop IGBT, can effectively reduce again loss during IGBT commutation.
In order to realize above-mentioned utility model purpose, this utility model discloses a kind of secondary inverting drive circuit for AC-DC argon arc welding machine, and this secondary inverting drive circuit includes: triangle wave generating circuit, for producing a triangular wave；Chopper circuit, this chopper circuit connects the outfan of this triangle wave generating circuit, for the output one adjustable square wave of output duty cycle；Delay circuit, this delay circuit connects the outfan of this chopper circuit, drives signal for producing the two-way with a Dead Time.
Further, this secondary inverting drive circuit also includes that one reversely judges to drag down given circuit, and this reversely judges that dragging down given circuit connects the outfan of this chopper circuit, during for making the level change of this square wave, reduces output electric current.
Further, this secondary inverting drive circuit also includes a current foldback circuit, this overcurrent protection electricity
Road is connected with the outfan of this delay circuit, and when stream occurred in this AC-DC argon arc welding machine, this driving signal is lockable.
Further, this delay circuit regulates this Dead Time by resistor capacitor diode.
Further, this triangle wave generating circuit includes operational amplifier U3B, U3C, electric capacity C23, electricity
Resistance R34, R32, R33 and stabilivolt ZD2, ZD3, the positive input terminal ground connection of this operational amplifier U3B, negative input end connects this resistance R34, electric capacity C 23, outfan is connected with stabilivolt ZD2 and this chopper circuit, one end of this stabilivolt ZD3 connects stabilivolt ZD2, the other end connects the positive input terminal of this operational amplifier U3C, and the positive input terminal of this operational amplifier U3C is connected with its outfan through resistance R32, R33, the negative input end ground connection of this operational amplifier U3C.
Further, this chopper circuit includes resistance R37, R38, variable resistance R2, operational amplifier U3A, electric capacity C24, this variable resistance R2 is for inputting the cleaning effect of this alternating-current argon arc welder, the adjustable side of this variable resistance R2 connects resistance R37, one end of this electric capacity C24 connects resistance R37 and the positive input terminal of this operational amplifier U3A, the other end ground connection of this electric capacity C24, the negative input end of this operational amplifier U3A connects this triangle wave generating circuit, and its outfan connects the other end of resistance R38, this resistance R38 and connects delay circuit.
Further, this delay circuit includes phase inverter U4F, U4C, U4D, diode D2, D4, D11, D12, resistance R32, R33, R36, R37 and electric capacity C25, C26；This diode D2, D12 and resistance R32, R36 and electric capacity C26 form the first resistor capacitor diode, and this diode D4, D11 and resistance R33, R37 and electric capacity C25 form the second resistor capacitor diode, this electric capacity C24, C25 ground connection；The input of this first resistor capacitor diode connects this phase inverter U4F, and outfan connects this phase inverter U4D；The input of this second resistor capacitor diode connects the outfan of this chopper circuit, and outfan connects this phase inverter U4DC.
Further, this reversely judges that dragging down given circuit includes NAND gate U9, phase inverter U2E, diode D6, D8, D9, resistance R22, R30 and electric capacity C28, C43；This resistance R22 connects this diode D6；State resistance R30 and connect this diode D9；The other end of this diode D9 and electric capacity C28, C43 connection in series-parallel；The first input end of this NAND gate U9 connects the outfan of this delay circuit, and the second end is connected with diode D6, and outfan connects this phase inverter U2E；The other end of this phase inverter U2E connects this diode D8.
Further, this current foldback circuit is a phase inverter.
Compared with prior art, this utility model provides a kind of secondary inverting drive circuit for AC-DC argon arc welding machine to be determined by Dead Time, is possible to prevent IGBT upper and lower bridge arm to lead directly to, and is reduced to by given value of current when alternating current-direct current commutates every time minimum.Both the protection to ac converter loop IGBT can be realized, loss when IGBT commutates and noise can be effectively reduced again.
Accompanying drawing explanation
Can be further understood by following utility model detailed description and institute's accompanying drawings with spirit about advantage of the present utility model.
Fig. 1 is the structural representation of the secondary inverting drive circuit involved by this utility model；
Fig. 2 is the circuit diagram of the secondary inverting drive circuit involved by this utility model；
Fig. 3 is the oscillogram of the triangle wave generating circuit generation of the secondary inverting drive circuit involved by this utility model；
Fig. 4 is the oscillogram after the copped wave of the secondary inverting drive circuit involved by this utility model；
Fig. 5 is the oscillogram of the part of nodes of the secondary inverting drive circuit involved by this utility model.
Mainly illustrate
10-triangle wave generating circuit 20-chopper circuit
30-current foldback circuit 40-delay circuit
50-reversely judges to drag down circuit
Detailed description of the invention
Describe specific embodiment of the utility model below in conjunction with the accompanying drawings in detail.
When Dead Time (Dead Zone) is PWM output, for the protective time slot making the upper down tube of H bridge or half-H-bridge will not arrange because switching speed problem simultaneously turns on, so in this time, upper down tube is all without there being output.Principle of the present utility model is to determine Dead Time by delay circuit, is possible to prevent IGBT upper and lower bridge arm to lead directly to.This utility model is simultaneously by reversely judging that drag down circuit is reduced to minimum when alternating current-direct current commutates every time by given value of current, it is achieved small area analysis commutates, and effectively reduces loss when noise and commutation.
As it is shown in figure 1, Fig. 1 is the structural representation of the secondary inverting drive circuit involved by this utility model.This secondary inverting drive circuit includes triangle wave generating circuit 10, for producing a triangular wave.Chopper circuit 20, this chopper circuit 20 connects the outfan of this triangle wave generating circuit 10, for the output one adjustable square wave of output duty cycle.Delay circuit 40, this delay circuit 40 connects the outfan of this chopper circuit 20, drives signal for producing the two-way with a Dead Time.This secondary inverting drive circuit also includes that one reversely judges to drag down given circuit 50 and reversely judges to drag down given circuit and connect this chopper circuit 20 and go out end, during for making the level change of this square wave, reduces and exports electric current.This secondary inverting drive circuit also includes a current foldback circuit 30, and this current foldback circuit 50 is connected with the outfan of this chopper circuit 20, and when stream occurred in this AC-DC argon arc welding machine, this driving signal is lockable.
First triangle wave generating circuit produces triangular wave, and adjustable resistance R2 is the potentiometer of cleaning effect regulation, is selected the dutycycle of square wave by U3A copped wave.RCD(resistor capacitor diode by delay circuit) regulate the Dead Time of two-way drive circuit, when there is level change i.e. height along upset in driving pulse, because two-way input Zhong You mono-tunnel of NAND gate U9 is through time delay, therefore upset moment NAND gate U9 output high level, it it is low level output after not gate U2E, after diode D8, the level of given AC20 point is pulled down to 0.5V, small area analysis upset when historical facts or anecdotes now commutates.
Fig. 2 is the circuit diagram of the secondary inverting drive circuit involved by this utility model.As shown in Figure 2, triangle wave generating circuit includes operational amplifier U3B, U3C, electric capacity C23, resistance R34, R32, R33 and stabilivolt ZD2, ZD3, the positive input terminal ground connection of this operational amplifier U3B, negative input end connects this resistance R34, electric capacity C23, outfan is connected with stabilivolt ZD2 and this chopper circuit, one end of this stabilivolt ZD3 connects stabilivolt ZD2, the other end connects the positive input terminal of this operational amplifier U3C, the positive input terminal of this operational amplifier U3C is connected with its outfan through resistance R32, R33, the negative input end ground connection of this operational amplifier U3C.
This chopper circuit includes resistance R37, R38, variable resistance R2, operational amplifier U3A, electric capacity C24, this variable resistance R2 is for inputting the cleaning effect of this alternating-current argon arc welder, the adjustable side of this variable resistance R2 connects resistance R37, one end of this electric capacity C24 connects resistance R37 and the positive input terminal of this operational amplifier U3A, the other end ground connection of this electric capacity C24, the negative input end of this operational amplifier U3A connects this triangle wave generating circuit, its outfan connects the other end of resistance R38, this resistance R38 and connects delay circuit.
This delay circuit includes phase inverter U4F, U4C, U4D, diode D2, D4, D11, D12, resistance R32, R33, R36, R37 and electric capacity C25, C26；This diode D2, D12 and resistance R32, R36 and electric capacity C26 form the first resistor capacitor diode, and this diode D4, D11 and resistance R33, R37 and electric capacity C25 form the second resistor capacitor diode, this electric capacity C24, C25 ground connection；The input of this first resistor capacitor diode connects this phase inverter U4F, and outfan connects this phase inverter U4D；The input of this second resistor capacitor diode connects the outfan of this chopper circuit, and outfan connects this phase inverter U4DC.
This reversely judges that dragging down given circuit includes NAND gate U9, phase inverter U2E, diode D6, D8, D9, resistance R22, R30 and electric capacity C28, C43；This resistance R22 connects this diode D6；State resistance R30 and connect this diode D9；The other end of this diode D9 and electric capacity C28, C43 connection in series-parallel；The first input end of this NAND gate U9 connects the outfan of this delay circuit, and the second end is connected with diode D6, and outfan connects this phase inverter U2E；The other end of this phase inverter U2E connects this diode D8.
Overcurrent protection is made up of phase inverter U4E.
Fig. 5 is the oscillogram of the part of nodes of the secondary inverting drive circuit involved by this utility model.As it is shown in figure 5,21 is the current waveform figure of output；22 is the drive waveforms of secondary inverting；The waveform that 23 is the output of NAND gate U9；24 is the drive waveforms that inverter current is given.Be can be seen that before drive waveforms 24 commutates by above-mentioned waveform, reversely, given value of current 22AC20 drops to 0.5V in NAND gate output 23, and actual output current 21 is also minimized electric current output by 200A, so can reach to complete commutation when minimum current exports.
Compared with prior art, this utility model provides a kind of secondary inverting drive circuit for AC-DC argon arc welding machine to be determined by Dead Time, is possible to prevent IGBT upper and lower bridge arm to lead directly to, and is reduced to by given value of current when alternating current-direct current commutates every time minimum.Both the protection to ac converter loop IGBT can be realized, loss when IGBT commutates and noise can be effectively reduced again.
Simply preferred embodiment of the present utility model described in this specification, above example is only in order to illustrate the technical solution of the utility model rather than to restriction of the present utility model.All those skilled in the art according to design of the present utility model by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within the scope of this utility model.
Claims (9)
1. the secondary inverting drive circuit for AC-DC argon arc welding machine, it is characterised in that described secondary inverting drive circuit includes:
One triangle wave generating circuit, for producing a triangular wave；
One chopper circuit, described chopper circuit connects the outfan of described triangle wave generating circuit, for the output one adjustable square wave of output duty cycle；
One delay circuit, described delay circuit connects the outfan of described chopper circuit, drives signal for producing the two-way with a Dead Time.
2. the secondary inverting drive circuit for AC-DC argon arc welding machine as claimed in claim 1, it is characterized in that, described secondary inverting drive circuit also includes that one reversely judges to drag down given circuit, described reverse judgement drags down given circuit and connects the outfan of described chopper circuit, when the level change making described square wave, reduce output electric current.
3. the secondary inverting drive circuit for AC-DC argon arc welding machine as claimed in claim 1; it is characterized in that; described secondary inverting drive circuit also includes a current foldback circuit; described current foldback circuit is connected with the outfan of described delay circuit; when stream occurred in described AC-DC argon arc welding machine, described driving signal is lockable.
4. the secondary inverting drive circuit for AC-DC argon arc welding machine as claimed in claim 1, it is characterised in that described delay circuit regulates described Dead Time by resistor capacitor diode.
5. the secondary inverting drive circuit for AC-DC argon arc welding machine as claimed in claim 1, it is characterized in that, described triangle wave generating circuit includes operational amplifier U3B, U3C, electric capacity C23, resistance R34, R32, R33 and stabilivolt ZD2, ZD3, the positive input terminal ground connection of described operational amplifier U3B, negative input end connects described resistance R34, electric capacity C 23, outfan is connected with stabilivolt ZD2 and described chopper circuit, one end of described stabilivolt ZD3 connects stabilivolt ZD2, the other end connects the positive input terminal of described operational amplifier U3C, the positive input terminal of described operational amplifier U3C is through resistance R32, R33 is connected with its outfan, the negative input end ground connection of described operational amplifier U3C.
6. the secondary inverting drive circuit for AC-DC argon arc welding machine as claimed in claim 1, it is characterized in that, described chopper circuit includes resistance R37, R38, variable resistance R2, operational amplifier U3A, electric capacity C24, described variable resistance R2 is for inputting the cleaning effect of described AC-DC argon arc welding machine, the adjustable side of described variable resistance R2 connects resistance R37, one end of described electric capacity C24 connects resistance R37 and the positive input terminal of described operational amplifier U3A, the other end ground connection of described electric capacity C24, the negative input end of described operational amplifier U3A connects described triangle wave generating circuit, its outfan connects resistance R38, the other end of described resistance R38 connects delay circuit.
7. the secondary inverting drive circuit for AC-DC argon arc welding machine as claimed in claim 1, it is characterized in that, described delay circuit includes phase inverter U4F, U4C, U4D, diode D2, D4, D11, D12, resistance R32, R33, R36, R37 and electric capacity C25, C26；Described diode D2, D12 and resistance R32, R36 and electric capacity C26 form the first resistor capacitor diode, and described diode D4, D11 and resistance R33, R37 and electric capacity C25 form the second resistor capacitor diode, described electric capacity C24, C25 ground connection；The input of described first resistor capacitor diode connects described phase inverter U4F, and outfan connects described phase inverter U4D；The input of described second resistor capacitor diode connects the outfan of described chopper circuit, and outfan connects described phase inverter U4DC.
8. the secondary inverting drive circuit for AC-DC argon arc welding machine as claimed in claim 2, it is characterized in that, described reverse judgement drags down given circuit and includes NAND gate U9, phase inverter U2E, diode D6, D8, D9, resistance R22, R30 and electric capacity C28, C43；Described resistance R22 connects described diode D6；State resistance R30 and connect described diode D9；The other end of described diode D9 and electric capacity C28, C43 connection in series-parallel；The first input end of described NAND gate U9 connects the outfan of described chopper circuit, and the second end is connected with diode D6, and outfan connects described phase inverter U2E；The other end of described phase inverter U2E connects described diode D8.
9. the secondary inverting drive circuit for AC-DC argon arc welding machine as claimed in claim 3, it is characterised in that described current foldback circuit is a phase inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620065989.9U CN205520010U (en) | 2016-01-25 | 2016-01-25 | Be used for alternating current -direct current argon arc welding machine secondary inverter drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620065989.9U CN205520010U (en) | 2016-01-25 | 2016-01-25 | Be used for alternating current -direct current argon arc welding machine secondary inverter drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205520010U true CN205520010U (en) | 2016-08-31 |
Family
ID=56768009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620065989.9U Expired - Fee Related CN205520010U (en) | 2016-01-25 | 2016-01-25 | Be used for alternating current -direct current argon arc welding machine secondary inverter drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205520010U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728901A (en) * | 2016-01-25 | 2016-07-06 | 上海威特力焊接设备制造股份有限公司 | Secondary inverter driving circuit for alternating current-direct current argon arc welding machine |
-
2016
- 2016-01-25 CN CN201620065989.9U patent/CN205520010U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728901A (en) * | 2016-01-25 | 2016-07-06 | 上海威特力焊接设备制造股份有限公司 | Secondary inverter driving circuit for alternating current-direct current argon arc welding machine |
| CN105728901B (en) * | 2016-01-25 | 2017-08-01 | 上海威特力焊接设备制造股份有限公司 | One kind is used for AC-DC argon arc welding machine secondary inverting drive circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109954957A (en) | The welding supply that shielded arc welding welding system and shielded arc welding connect | |
| CN103715935B (en) | A kind of loss based on modular multilevel voltage source converter determines method | |
| US10807184B2 (en) | SiC inverted plasma cutting power supply | |
| CN103692056B (en) | Multifunctional digital ripple control arc welding inverter | |
| CN102672310B (en) | Based on the parallel great power pulse MIC welding inverter system of DSP | |
| CN108057942A (en) | A kind of short circuiting arc welding method and system | |
| CN109167518A (en) | A kind of vehicle power supply bidirectional DC-DC converter and its control method | |
| CN100460122C (en) | Super speed inverting pole-changing square wave current arc-welding power supply device | |
| CN108127239A (en) | Aluminium alloy robot variable polarity plasma arc welding arc smart punching welding system | |
| CN105537728B (en) | It is a kind of to improve inverter argon arc welding machine low current arcing initiation success rate and the circuit of stability | |
| CN205520010U (en) | Be used for alternating current -direct current argon arc welding machine secondary inverter drive circuit | |
| CN205681111U (en) | A kind of novel current-limiting type power flow control system | |
| CN103737154A (en) | High-frequency square-wave DC (Direct Current) pulse coupling power unit used for electrical arc welding | |
| CN105728901B (en) | One kind is used for AC-DC argon arc welding machine secondary inverting drive circuit | |
| CN104128680B (en) | Electrochemical machining high frequency pulse power source based on SOPC technology | |
| CN104901574A (en) | Bridge circuit and short circuit protection method thereof | |
| CN206313442U (en) | A kind of restraining device of second harmonic current | |
| CN203636178U (en) | Inverter welder | |
| CN205342168U (en) | A current waveform control circuit for exchanging argon arc welding machine | |
| CN205945161U (en) | Discharge circuit and high voltage generator of dc bus | |
| CN202079341U (en) | Arc-stabilizing device of alternate-current argon arc welder | |
| CN204122893U (en) | High-voltage pulse thread-leading arc circuit | |
| KR100278799B1 (en) | Arc type electric welding method using voltage type inverter | |
| CN201644995U (en) | IGBT inverting-type gas-shielded welder welding starting circuit | |
| CN204843224U (en) | Utmost point gas shielded arc welding machine is melted in contravariant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |