CN201275656Y - Inversion type direct-current welding machine - Google Patents
Inversion type direct-current welding machine Download PDFInfo
- Publication number
- CN201275656Y CN201275656Y CN 200820150612 CN200820150612U CN201275656Y CN 201275656 Y CN201275656 Y CN 201275656Y CN 200820150612 CN200820150612 CN 200820150612 CN 200820150612 U CN200820150612 U CN 200820150612U CN 201275656 Y CN201275656 Y CN 201275656Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- control circuit
- current
- welding machine
- 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
Images
Landscapes
- Arc Welding Control (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The utility model relates to an inverter type DC electric welding machine, comprising a main inverter circuit, a DC output circuit, a detection circuit, a constant-power control circuit and a pulse-width control circuit. The inverter type DC electric welding machine further comprises an overvoltage/overcurrent protection circuit which is connected with the main inverter circuit and a frequency-correcting dead area control circuit. The output end of the main inverter circuit is connected with the input end of the DC output circuit; the DC output circuit is provided with two output ports, one output port is connected with a welding electrode and the other output port is connected with the input end of the detection circuit; a difference value signal output by the detection circuit is accessed to the input end of the constant-power control circuit; the output end of the constant-power control circuit is connected to the main inverter circuit by passing through the pulse-width control circuit; a negative feedback loop composed by the detection circuit, the constant-power control circuit and the pulse-width control circuit is used for adjusting the pulse width output by the pulse-width control circuit. When the inverter type DC electric welding machine carries out large-current welding, the burning of an electric arc is stable and soft with little spattering, thus improving the performance of the welding machine when in large-current working and improving the welding quality.
Description
Technical field
The utility model relates to a kind of electric welding machine, particularly a kind of inversion type direct-current welding machine.
Background technology
The inversion direct current welding machine mostly adopts the technical scheme of constant current to obtain output external characteristic preferably both at home and abroad at present.But this kind technical scheme is when big electric current output, and along with the raising or forcing down of welding arc, the voltage between its electric arc also increases or reduces, and then the power of electric arc also increases thereupon or reduces.After electric arc was raised, because arc power strengthens, then splash also increased thereupon, unfavorable to welding, and the increasing of power, the efficient of butt welding machine and service life are all influential.
The utility model content
A kind of inversion type direct-current welding machine that the utility model provides has permanent power control of big electric current and the anti-function of splashing.
In order to achieve the above object, the utility model provides a kind of inversion type direct-current welding machine, comprises:
Main inverter circuit, dc output circuit, testing circuit, constant-power control circuit and pulse width control circuit; The output of main inverter circuit connects the input of dc output circuit, dc output circuit divides two-way output, one the tunnel connects welding electrode, another road connects the input of testing circuit, testing circuit output difference signal inserts the input of constant-power control circuit, and the output of constant-power control circuit is connected to main inverter circuit through the pulsewidth control circuit;
Also comprise over-voltage over-current protection circuit and frequency correction dead band control circuit that circuit connects main inverter circuit;
Main inverter circuit is made up of current rectifying and wave filtering circuit and power inversion circuit, current rectifying and wave filtering circuit is made up of secondary, some diodes, resistance, electric capacity and the inductance of transformer, and power inversion circuit is made up of elementary, some igbts, resistance and the electric capacity of transformer.
Constant-power control circuit is made of some multipliers, and this multiplier comprises some triodes, comparator, diode, resistance and electric capacity, and pulse-width control signal of constant-power control circuit output is delivered to the input of pulse width control circuit.
Pulse width control circuit is made up of control integrated circuit, some resistance, electric capacity and diode, and high-frequency driving signal of pulse width control circuit output is delivered to main inverter circuit.
Testing circuit is made up of comparator, electric current and voltage sample circuit and electric current and voltage set-point circuit, the output of electric current and voltage sample circuit and electric current and voltage set-point circuit connects the input of comparator respectively, and the output of comparator circuit is respectively the input that constant-power control circuit provides a difference signal;
Over-voltage over-current protection circuit is made up of some triodes, resistance and electric capacity, when overtension or electric current are excessive, cut off the work of main inverter circuit, thereby protects electric welding machine can not damage because of immediate current is excessive conscientiously;
Frequency correction dead band control circuit is made up of some triodes and resistance, output pulse frequency is regulated in variation with line voltage automatically, keep output voltage not produce too big variation because of raising significantly of electrical network input voltage, when also having avoided line voltage to raise, output pulse dead band is strengthened relatively, and the inversion utmost point produces common conducting and damages device;
Behind three-phase alternating current process current rectifying and wave filtering circuit rectifying and wave-filtering, the DC voltage of output is reverse into high frequency square wave voltage by power inversion circuit, dc output circuit adopts centre cap formula way of full-wave rectification, the high frequency square wave voltage rectification is become unidirectional stable direct current output, for welding, and the negative feedback loop that constitutes by testing circuit, constant-power control circuit and pulse width control circuit, at output current greater than 200A, when arc voltage is higher than normal voltage, be used to regulate the pulse width of pulse width control circuit output;
The utility model is when big electric current welding, arc burning is stable, soft, it is little to splash, and the performance when having improved the big current work of welding machine has improved welding quality.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Followingly specify better embodiment of the present utility model according to Fig. 1:
As shown in Figure 1, the utility model provides a kind of inversion type direct-current welding machine, comprises:
Main inverter circuit 101, dc output circuit 102, testing circuit 103, constant-power control circuit 104 and pulse width control circuit 105; The output of main inverter circuit 101 connects the input of dc output circuit 102, dc output circuit two-way output in 102 fens, one the tunnel connects welding electrode, another road connects the input of testing circuit 103, testing circuit 103 output difference signals insert the input of constant-power control circuit 104, and the output of constant-power control circuit 104 is connected to main inverter circuit 101 through pulsewidth control circuit 105;
Also comprise over-voltage over-current protection circuit 106 and frequency correction dead band control circuit 107 that circuit connects main inverter circuit 101;
Main inverter circuit 101 is made up of current rectifying and wave filtering circuit and power inversion circuit, current rectifying and wave filtering circuit is made up of secondary, some diodes, resistance, electric capacity and the inductance of transformer, and power inversion circuit is made up of elementary, some igbts, resistance and the electric capacity of transformer.In the present embodiment, power inversion circuit adopts the semibridge system power inversion circuit.
Constant-power control circuit 104 is made of some multipliers, and this multiplier comprises some triodes, comparator, diode, resistance and electric capacity, and pulse-width control signal of constant-power control circuit output is delivered to the input of pulse width control circuit.
Pulse width control circuit 105 is made up of control integrated circuit, some resistance, electric capacity and diode, and high-frequency driving signal of pulse width control circuit output is delivered to main inverter circuit.
Testing circuit 103 is made up of comparator, electric current and voltage sample circuit and electric current and voltage set-point circuit, the output of electric current and voltage sample circuit and electric current and voltage set-point circuit connects the input of comparator respectively, and the output of comparator circuit is respectively the input that constant-power control circuit provides a difference signal;
Over-voltage over-current protection circuit 106 is made up of some triodes, resistance and electric capacity, when overtension or electric current are excessive, cut off the work of main inverter circuit, thereby protects electric welding machine can not damage because of immediate current is excessive conscientiously;
Frequency correction dead band control circuit 107 is made up of some triodes and resistance, output pulse frequency is regulated in variation with line voltage automatically, keep output voltage not produce too big variation because of raising significantly of electrical network input voltage, when also having avoided line voltage to raise, output pulse dead band is strengthened relatively, and the inversion utmost point produces common conducting and damages device;
Behind three-phase alternating current process current rectifying and wave filtering circuit rectifying and wave-filtering, the DC voltage of output is reverse into high frequency square wave voltage by power inversion circuit, dc output circuit adopts centre cap formula way of full-wave rectification, the high frequency square wave voltage rectification is become unidirectional stable direct current output, for welding, and the negative feedback loop that constitutes by testing circuit, constant-power control circuit and pulse width control circuit, at output current greater than 200A, when arc voltage is higher than normal voltage, be used to regulate the pulse width of pulse width control circuit output;
The size of welding current is by the pulsewidth size decision of 20KHz high frequency square wave voltage, the size of its pulsewidth is determined by the switch duty time ratio of the drive igbt that pulse width control circuit produces, can guarantee that its power output is constant thereby control pulsewidth effectively.
Claims (10)
1. an inversion type direct-current welding machine is characterized in that, comprises:
Main inverter circuit (101), dc output circuit (102), testing circuit (103), constant-power control circuit (104) and pulse width control circuit (105);
Also comprise over-voltage over-current protection circuit (106) and frequency correction dead band control circuit (107) that circuit connects main inverter circuit (101);
The output of main inverter circuit (101) connects the input of dc output circuit (102), dc output circuit (102) divides two-way output, one the tunnel connects welding electrode, another road connects the input of testing circuit (103), testing circuit (103) output difference signal inserts the input of constant-power control circuit (104), and the output of constant-power control circuit (104) is connected to main inverter circuit (101) through pulsewidth control circuit (105).
2. inversion type direct-current welding machine as claimed in claim 1, it is characterized in that, described testing circuit (103), constant-power control circuit (104) and pulse width control circuit (105) constitute negative feedback loop, at output current greater than 200A, when arc voltage is higher than normal voltage, be used to regulate the pulse width of pulse width control circuit (105) output.
3. inversion type direct-current welding machine as claimed in claim 1, it is characterized in that, described main inverter circuit (101) is made up of current rectifying and wave filtering circuit and power inversion circuit, described current rectifying and wave filtering circuit is made up of secondary, some diodes, resistance, electric capacity and the inductance of transformer, and power inversion circuit is made up of elementary, some igbts, resistance and the electric capacity of transformer.
4. inversion type direct-current welding machine as claimed in claim 4 is characterized in that, described power inversion circuit adopts the semibridge system power inversion circuit, the output high frequency square wave voltage.
5. inversion type direct-current welding machine as claimed in claim 1, it is characterized in that, described constant-power control circuit (104) is made of some multipliers, this multiplier comprises some triodes, comparator, diode, resistance and electric capacity, and pulse-width control signal of constant-power control circuit output is delivered to the input of pulse width control circuit.
6. inversion type direct-current welding machine as claimed in claim 1, it is characterized in that, described pulse width control circuit (105) is made up of control integrated circuit, some resistance, electric capacity and diode, and high-frequency driving signal of pulse width control circuit output is delivered to main inverter circuit.
7. inversion type direct-current welding machine as claimed in claim 1, it is characterized in that, described testing circuit (103) is made up of comparator, electric current and voltage sample circuit and electric current and voltage set-point circuit, the output of electric current and voltage sample circuit and electric current and voltage set-point circuit connects the input of comparator respectively, and the output of comparator circuit is respectively the input that constant-power control circuit provides a difference signal.
8. inversion type direct-current welding machine as claimed in claim 1 is characterized in that, described dc output circuit (102) adopts centre cap formula way of full-wave rectification, and the high frequency square wave voltage rectification is become unidirectional stable direct current output.
9. as one of any described inversion type direct-current welding machine among the claim 1-9, it is characterized in that, the size of described welding current is by the pulsewidth size decision of 20KHz high frequency square wave voltage, the size of its pulsewidth is determined by the switch duty time ratio of the drive igbt that pulse width control circuit (105) produces, can guarantee that its power output is constant thereby control pulsewidth effectively.
10. inversion type direct-current welding machine as claimed in claim 1, it is characterized in that, described over-voltage over-current protection circuit (106) is made up of some triodes, resistance and electric capacity, when overtension or electric current are excessive, cut off the work of main inverter circuit, the protection electric welding machine can not damage because of immediate current is excessive; Described frequency correction dead band control circuit (107) is made up of some triodes and resistance, output pulse frequency is regulated in variation with line voltage automatically, keep output voltage not produce too big variation because of raising significantly of electrical network input voltage, when also having avoided line voltage to raise, output pulse dead band is strengthened relatively, and the inversion utmost point produces common conducting and damages device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820150612 CN201275656Y (en) | 2008-07-08 | 2008-07-08 | Inversion type direct-current welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820150612 CN201275656Y (en) | 2008-07-08 | 2008-07-08 | Inversion type direct-current welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201275656Y true CN201275656Y (en) | 2009-07-22 |
Family
ID=40893234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200820150612 Expired - Fee Related CN201275656Y (en) | 2008-07-08 | 2008-07-08 | Inversion type direct-current welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201275656Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554409A (en) * | 2012-01-06 | 2012-07-11 | 广州市长胜焊接设备实业有限公司 | Digital welding machine with fine welding waveform |
| CN103415818A (en) * | 2011-01-11 | 2013-11-27 | 西门子公司 | Method and device for filtering a signal and control device for a process |
-
2008
- 2008-07-08 CN CN 200820150612 patent/CN201275656Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415818A (en) * | 2011-01-11 | 2013-11-27 | 西门子公司 | Method and device for filtering a signal and control device for a process |
| CN102554409A (en) * | 2012-01-06 | 2012-07-11 | 广州市长胜焊接设备实业有限公司 | Digital welding machine with fine welding waveform |
| CN102554409B (en) * | 2012-01-06 | 2015-06-10 | 广州长胜机电有限公司 | Digital welding machine with fine welding waveform |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203840210U (en) | AC inverter circuit | |
| CN104795876B (en) | Intelligent charger based on multi-resonant topology | |
| CN101318251A (en) | Negative feedback inversion type direct-current welding machine | |
| CN206250979U (en) | A kind of quasi-resonance active-clamp flyback converter | |
| CN108422065B (en) | Pulse MIG welding power supply system based on CAN field bus and LLC resonant converter and control method thereof | |
| CN203086345U (en) | Power converting device | |
| CN102806407B (en) | Inverter welding machine | |
| CN102665369B (en) | High-power electronic ballast | |
| CN202524315U (en) | DC/AC grid-connected inversion circuit | |
| CN201275656Y (en) | Inversion type direct-current welding machine | |
| CN202940740U (en) | High-power PWM type switch voltage-stabilized power supply | |
| CN201009039Y (en) | High-frequency IGBT inversion type arc burying welding power source | |
| CN201928192U (en) | Single-phase AC (alternating current) voltage regulation circuit | |
| CN108063548A (en) | A kind of buffer circuit for BUCK converters | |
| CN201380360Y (en) | Inversion power supply of medium-frequency resistance welding machine | |
| CN208316575U (en) | A kind of inverse-excitation type switch power-supply Lossless Clamp Circuit | |
| CN204810140U (en) | Power factor correction circuit and invertion power supply circuit, contravariant welding machine | |
| CN204835682U (en) | Direct current motor supply circuit | |
| CN201002166Y (en) | High-frequency IGBT inversion type hand welding power source | |
| CN203911761U (en) | Switching power supply circuit and electronic device | |
| CN210412978U (en) | High-stability high-current arc welding power supply based on inverter technology | |
| CN210080918U (en) | Double-pulse MIG welding power supply based on SiC power device | |
| CN102946200A (en) | Wide-load-range low-voltage flyback power factor correction converter control method and device for realizing method | |
| CN202026242U (en) | High-frequency and high-voltage direct-current switching power supply based on current source mode | |
| CN112953189A (en) | Charging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI HUGONG WELDING GROUP CO., LTD. Free format text: FORMER NAME: SHANGHAI HUGONG ELECTRIC WEDLING MACHINE MANUFACTURING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 201700 No. 7177 Pine Road, Qingpu District, Shanghai Patentee after: Shanghai Hugong Welding Group Co., Ltd. Address before: 201700 No. 7177 Pine Road, Qingpu District, Shanghai Patentee before: Shanghai Hugong Electric Wedling Machine Manufacturing Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20160708 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |