CN203660913U - Circuit structure of inverter welding machine - Google Patents
Circuit structure of inverter welding machine Download PDFInfo
- Publication number
- CN203660913U CN203660913U CN201420004039.6U CN201420004039U CN203660913U CN 203660913 U CN203660913 U CN 203660913U CN 201420004039 U CN201420004039 U CN 201420004039U CN 203660913 U CN203660913 U CN 203660913U
- Authority
- CN
- China
- Prior art keywords
- triode
- utmost point
- circuit
- resistance
- power supply
- 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
- 238000003466 welding Methods 0.000 title abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 10
- 230000007812 deficiency Effects 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000032038 Premature aging Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model discloses a circuit structure of an inverter welding machine. The circuit structure of the inverter welding machine comprises a power supply input end, a rectification filter circuit, an inverter circuit, a power supply output end, a drive circuit, a power supply IC and a current sampling circuit, and also comprises a sampling circuit, a potentiometer RP1, resistors R4-R8, triodes Q1-Q4 and diodes D2-D3. The circuit structure of the inverter welding machine enables a complete machine output current to be reduced when the inverter output voltage of the inverter circuit is very low, namely, the output is in short circuit or a load is overweight, thereby avoiding a series problems caused by that the external short circuit enables the current to be oversize.
Description
Technical field
The utility model relates to welding machine, relates in particular to a kind of circuit structure of inverter type welder.
Background technology
Inversion manual welding machine has been come into huge numbers of families, although market is increasing, but the condition at present facing to each enterprise one bangs, enterprise wants to guarantee its competitiveness on market, need to weed out the old and bring forth the new, produce a can meeting customer need, again can be cost-saving and enough inverter type welders reliably.The inversion manual welding machine using on the market is at present owing to having reduced in some aspects cost as rectification output reactance is cancelled, in load short circuits or overload (while bonding to workpiece as welding rod), or electrode holder is while directly encountering workpiece, easily there is the situation that current-rising-rate is too high, electric current is excessive, cause machine to burn out, and when cable and welding rod electric current are too large, can cause welding rod overheated and burn periphery some materials and parts, and can cause the cable lost of life, premature aging, therefore some welding machine can increase antiseized function to prevent the generation of above-mentioned situation.But the mode of current antiseized function sampling is to adopt output voltage sampling, directly sample from welding terminal, owing to being subject to the impact of electric welding machine load characteristic, such sampling mode is subject to external environment influence large, easily be subject to the thickness of welding rod, the impact such as length, the thickness of cable of output welding cable line, when cable is oversize or when too thin, machine is easily judged by accident, likely cause the problems such as disabler, circuit be unstable.
Summary of the invention
The utility model in prior art, exist sampling time be subject to the defects such as external environment influence is large, circuit is unstable, a kind of circuit structure of new inverter type welder is provided.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
A kind of circuit structure of inverter type welder, comprise power input, current rectifying and wave filtering circuit, inverter circuit, power output end, drive circuit, power supply IC, current sampling circuit, described power input is connected with inverter circuit by current rectifying and wave filtering circuit, described inverter circuit one tunnel is connected with power output end, the current sampling circuit of separately leading up to is connected with the current feedback terminal of power supply IC, the OUT end of described power supply IC is connected with inverter circuit by drive circuit, also comprise sample circuit, potentiometer RP, resistance R 4～R8, triode Q1～Q4, diode D2, diode D3, the OUT end of described power supply IC is connected with the B utmost point of triode Q1 by sample circuit, the C Ji Yi road of described triode Q1 is connected with the B utmost point of triode Q2, the resistance R 4 of separately leading up to is connected with the E utmost point of triode Q4, the C utmost point of described triode Q2 is connected with the E utmost point of triode Q3 by resistance R 8, described resistance R 7 is series between the B utmost point and the E utmost point of triode Q2, the B utmost point of described triode Q4 is connected with the B utmost point of triode Q3 by diode D3, the C utmost point of described triode Q4 is connected with reference voltage, the E utmost point of described triode Q1, the E utmost point of triode Q2, the C utmost point of triode Q3 is connected with earth terminal GND respectively, the preset end of electric current of described power supply IC is connected with the E utmost point of triode Q3 by diode D2, the B utmost point of described triode Q3 is connected with the movable end of potentiometer RP, described potentiometer RP one end is connected with reference voltage by resistance R 5, the other end is connected with earth terminal GND by resistance R 6.
The circuit of power input input is after current rectifying and wave filtering circuit rectifying and wave-filtering, export to inverter circuit, inverter circuit one tunnel output inverter voltage is to power output end, the current sampling circuit of separately leading up to outputs to the current feedback terminal of power supply IC, power supply IC to drive circuit, and drives inverter circuit work by drive circuit according to the current output signal of feedback, when circuit is normally worked, reference voltage is sampled to the B utmost point of triode Q3 from potentiometer RP movable end after by resistance R 5, potentiometer RP, resistance R 6 dividing potential drops, the preset end of electric current to power supply IC by diode D2 again, and the pulse duration that the OUT that controls power supply IC holds, and then drive inverter circuit output inverter voltage to export to power output end by drive circuit, simultaneously in the time that inverter circuit is worked, current sampling circuit detects the size of current of inverter circuit, and the current feedback terminal that exports power supply IC to forms current feedback, thereby form closed-loop control loop, when normal burst width, power supply IC output pulse basically forms direct current by sample circuit at the B of the triode Q1 utmost point, make triode Q1 conducting, the C utmost point of triode Q1 is extremely connected with the B of triode Q2, the C utmost point of triode Q1 becomes low level, be that triode Q2 is in cut-off state, the C utmost point to triode Q3 has no effect, on given electric current without impact, in the time of triode Q1 conducting, the C utmost point of triode Q1 becomes electronegative potential, by the E utmost point of resistance R 4 to triode Q4, can make the slight conducting of triode Q4, as long as the resistance of resistance R 4 is enough large, electric current by diode D3 is just very small, neglect on the intermediate voltage impact of potentiometer RP is micro-that it is micro-, substantially do not affect given value of current, in the time that the inverter output voltage of inverter circuit is very low, while occurring that short circuit or load are overweight, feed back to the current feedback terminal of power supply IC by inverter circuit and current sampling circuit, the OUT end pulsewidth of power supply IC narrows, output pulse is by the B utmost point to triode Q1 after sample circuit, deficiency is so that triode Q1 conducting, the C utmost point of triode Q1 is extremely connected with the B of triode Q2, now the C utmost point of triode Q1 is by the conducting of triode Q4, become high level by resistance R 4 again, make triode Q2 conducting, by resistance R 8, upper triode Q3 terminal voltage is dragged down, be equivalent to that potentiometer RP is given to diminish, make the pulse output of power supply IC become narrower, and drive inverter circuit through overdrive circuit, complete machine output current is diminished, thereby while preventing external short circuit, the series of problems causing because electric current is excessive.
As preferably, the circuit structure of a kind of inverter type welder described above, described sample circuit comprises resistance R 1, resistance R 2, resistance R 3, resistance R 9, diode D1, capacitor C 1, capacitor C 2, the OUT end of described power supply IC is by resistance R 1, diode D1, capacitor C 2 is connected with earth terminal GND, described capacitor C 1 one end is connected with a of diode D1 end, the other end of capacitor C 1 is connected with earth terminal GND, described resistance R 9 is parallel to the two ends of capacitor C 1, described resistance R 2 is series between the b end and the B utmost point of triode Q1 of diode D1, described resistance R 3 is series between the B utmost point and the E utmost point of triode Q1.The OUT end resistance R 1 of power supply IC, capacitor C 1, diode D1, capacitor C 2, resistance R 2 again with resistance R 3 dividing potential drops, make to basically form direct current at the B of the triode Q1 utmost point.
As preferably, the circuit structure of a kind of inverter type welder described above, also comprises resistance R 10, and the c end of described diode D3 is connected with earth terminal GND by resistance R 10.Make circuit performance more stable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the circuit structure of a kind of inverter type welder of the utility model.
Embodiment
Below in conjunction with accompanying drawing 1 and embodiment, the utility model is described in further detail, but they are not to restriction of the present utility model:
As shown in Figure 1, a kind of circuit structure of inverter type welder, comprise power input 1, current rectifying and wave filtering circuit 2, inverter circuit 4, power output end 3, drive circuit 6, power supply IC, current sampling circuit 5, described power input 1 is connected with inverter circuit 4 by current rectifying and wave filtering circuit 2, described inverter circuit 4 one tunnels are connected with power output end 3, the current sampling circuit 5 of separately leading up to is connected with the current feedback terminal of power supply IC, the OUT end of described power supply IC is connected with inverter circuit 4 by drive circuit 6, also comprise sample circuit 7, potentiometer RP, resistance R 4～R8, triode Q1～Q4, diode D2, diode D3, the OUT end of described power supply IC is connected with the B utmost point of triode Q1 by sample circuit 7, the C Ji Yi road of described triode Q1 is connected with the B utmost point of triode Q2, the resistance R 4 of separately leading up to is connected with the E utmost point of triode Q4, the C utmost point of described triode Q2 is connected with the E utmost point of triode Q3 by resistance R 8, described resistance R 7 is series between the B utmost point and the E utmost point of triode Q2, the B utmost point of described triode Q4 is connected with the B utmost point of triode Q3 by diode D3, the C utmost point of described triode Q4 is connected with reference voltage, the E utmost point of described triode Q1, the E utmost point of triode Q2, the C utmost point of triode Q3 is connected with earth terminal GND respectively, the preset end of electric current of described power supply IC is connected with the E utmost point of triode Q3 by diode D2, the B utmost point of described triode Q3 is connected with the movable end of potentiometer RP, described potentiometer RP one end is connected with reference voltage by resistance R 5, the other end is connected with earth terminal GND by resistance R 6.
The circuit that power input 1 is inputted is after current rectifying and wave filtering circuit 2 rectifying and wave-filterings, export to inverter circuit 4, inverter circuit 4 one tunnel output inverter voltages are to power output end 3, the current sampling circuit 5 of separately leading up to outputs to the current feedback terminal of power supply IC, power supply IC to drive circuit 6, and drives inverter circuit 4 to work by drive circuit 6 according to the current output signal of feedback, when circuit is normally worked, reference voltage is sampled to the B utmost point of triode Q3 from potentiometer RP movable end after by resistance R 5, potentiometer RP, resistance R 6 dividing potential drops, the preset end of electric current to power supply IC by diode D2 again, and the pulse duration that the OUT that controls power supply IC holds, and then drive inverter circuit 4 to export inverter voltage by drive circuit 6 to export to power output end 3, simultaneously in the time that inverter circuit 4 is worked, current sampling circuit 5 detects the size of current of inverter circuit 4, and the current feedback terminal that exports power supply IC to forms current feedback, thereby form closed-loop control loop, when normal burst width, power supply IC output pulse basically forms direct current by sample circuit 7 at the B of the triode Q1 utmost point, make triode Q1 conducting, the C utmost point of triode Q1 is extremely connected with the B of triode Q2, the C utmost point of triode Q1 becomes low level, be that triode Q2 is in cut-off state, the C utmost point to triode Q3 has no effect, on given electric current without impact, in the time of triode Q1 conducting, the C utmost point of triode Q1 becomes electronegative potential, by the E utmost point of resistance R 4 to triode Q4, can make the slight conducting of triode Q4, because the resistance of resistance R 4 is large, electric current by diode D3 is very little, neglect on the intermediate voltage impact of potentiometer RP is micro-that it is micro-, substantially do not affect given value of current, in the time that the inverter output voltage of inverter circuit 4 is very low, while occurring that short circuit or load are overweight, feed back to the current feedback terminal of power supply IC by inverter circuit 4 and current sampling circuit 5, the OUT end pulsewidth of power supply IC narrows, output pulse is by the rear B utmost point to triode Q1 of sample circuit 7, deficiency is so that triode Q1 conducting, the C utmost point of triode Q1 is extremely connected with the B of triode Q2, now the C utmost point of triode Q1 is by the conducting of triode Q4, become high level by resistance R 4 again, make triode Q2 conducting, by resistance R 8, upper triode Q3 terminal voltage is dragged down, be equivalent to that potentiometer RP is given to diminish, make the pulse output of power supply IC become narrower, and drive inverter circuit 4 through overdrive circuit 6, complete machine output current is diminished, thereby while preventing external short circuit, the series of problems causing because electric current is excessive.
As preferably, described sample circuit 7 comprises resistance R 1, resistance R 2, resistance R 3, resistance R 9, diode D1, capacitor C 1, capacitor C 2, the OUT end of described power supply IC is connected with earth terminal GND by resistance R 1, diode D1, capacitor C 2, described capacitor C 1 one end is connected with a of diode D1 end, the other end of capacitor C 1 is connected with earth terminal GND, described resistance R 9 is parallel to the two ends of capacitor C 1, described resistance R 2 is series between the b end and the B utmost point of triode Q1 of diode D1, and described resistance R 3 is series between the B utmost point and the E utmost point of triode Q1.
As preferably, also comprise resistance R 10, the c end of described diode D3 is connected with earth terminal GND by resistance R 10.
In a word, the foregoing is only preferred embodiment of the present utility model, the equalization that all scopes of applying for a patent according to the utility model are done changes and modifies, and all should belong to covering scope of the present utility model.
Claims (3)
1. the circuit structure of an inverter type welder, comprise power input (1), current rectifying and wave filtering circuit (2), inverter circuit (4), power output end (3), drive circuit (6), power supply IC, current sampling circuit (5), described power input (1) is connected with inverter circuit (4) by current rectifying and wave filtering circuit (2), described inverter circuit (4) one tunnels are connected with power output end (3), the current sampling circuit (5) of separately leading up to is connected with the current feedback terminal of power supply IC, the OUT end of described power supply IC is connected with inverter circuit (4) by drive circuit (6), it is characterized in that: also comprise sample circuit (7), potentiometer RP, resistance R 4～R8, triode Q1～Q4, diode D2, diode D3, the OUT end of described power supply IC is connected with the B utmost point of triode Q1 by sample circuit (7), the C Ji Yi road of described triode Q1 is connected with the B utmost point of triode Q2, the resistance R 4 of separately leading up to is connected with the E utmost point of triode Q4, the C utmost point of described triode Q2 is connected with the E utmost point of triode Q3 by resistance R 8, described resistance R 7 is series between the B utmost point and the E utmost point of triode Q2, the B utmost point of described triode Q4 is connected with the B utmost point of triode Q3 by diode D3, the C utmost point of described triode Q4 is connected with reference voltage, the E utmost point of described triode Q1, the E utmost point of triode Q2, the C utmost point of triode Q3 is connected with earth terminal GND respectively, the preset end of electric current of described power supply IC is connected with the E utmost point of triode Q3 by diode D2, the B utmost point of described triode Q3 is connected with the movable end of potentiometer RP, described potentiometer RP one end is connected with reference voltage by resistance R 5, the other end is connected with earth terminal GND by resistance R 6.
2. the circuit structure of a kind of inverter type welder according to claim 1, it is characterized in that: described sample circuit (7) comprises resistance R 1, resistance R 2, resistance R 3, resistance R 9, diode D1, capacitor C 1, capacitor C 2, the OUT end of described power supply IC is by resistance R 1, diode D1, capacitor C 2 is connected with earth terminal GND, described capacitor C 1 one end is connected with a of diode D1 end, the other end of capacitor C 1 is connected with earth terminal GND, described resistance R 9 is parallel to the two ends of capacitor C 1, described resistance R 2 is series between the b end and the B utmost point of triode Q1 of diode D1, described resistance R 3 is series between the B utmost point and the E utmost point of triode Q1.
3. the circuit structure of a kind of inverter type welder according to claim 1, is characterized in that: also comprise resistance R 10, the c end of described diode D3 is connected with earth terminal GND by resistance R 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420004039.6U CN203660913U (en) | 2014-01-06 | 2014-01-06 | Circuit structure of inverter welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420004039.6U CN203660913U (en) | 2014-01-06 | 2014-01-06 | Circuit structure of inverter welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203660913U true CN203660913U (en) | 2014-06-18 |
Family
ID=50927261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420004039.6U Expired - Fee Related CN203660913U (en) | 2014-01-06 | 2014-01-06 | Circuit structure of inverter welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203660913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825860A (en) * | 2017-01-19 | 2017-06-13 | 南京力仕达焊接科技有限公司 | Inverter type welder failure detector |
-
2014
- 2014-01-06 CN CN201420004039.6U patent/CN203660913U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825860A (en) * | 2017-01-19 | 2017-06-13 | 南京力仕达焊接科技有限公司 | Inverter type welder failure detector |
| CN106825860B (en) * | 2017-01-19 | 2019-10-11 | 南京力仕达焊接科技有限公司 | Inverter type welder fault detection means |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108213671B (en) | Method and device for controlling electric welding machine, electronic equipment and computer readable medium | |
| CN102570840A (en) | Voltage anode and cathode polarity switching circuit | |
| CN203660913U (en) | Circuit structure of inverter welding machine | |
| CN103831513A (en) | Energy-conservation control method and energy-conservation control device of electric arc welder | |
| CN103427621B (en) | A kind of mining isolated intrinsic safety LED drive power | |
| CN205129141U (en) | Take welding set of protection against electric shock | |
| CN202797867U (en) | Short circuit protection circuit and power supply circuit provided with the same | |
| CN104754800A (en) | Device for controlling input surge current of LED module | |
| CN103350269A (en) | Intelligent wire feeder | |
| CN104057181A (en) | Open-phase protection circuit for inverter welding machine | |
| CN103579995A (en) | Direct-current input switching power source and undervoltage protection circuit thereof | |
| CN204118706U (en) | A kind of multiple-channel output high reliability overvoltage crowbar | |
| CN203610824U (en) | Automatic wire feeding machine | |
| CN103500981B (en) | A kind of intrinsic safety correlator connecting non-intrinsically safe circuit and AC/DC intrinsically safe circuit | |
| CN202978235U (en) | >Switch power supply high-precision overvoltage protection circuit | |
| CN204913025U (en) | Welding controlling means and welding system | |
| CN105470927A (en) | Dynamic brake and corresponding servo driver | |
| CN206533114U (en) | Power supply overvoltage protection circuit and power supply | |
| CN204122895U (en) | A kind of Width funtion inverter type welder | |
| CN204089599U (en) | A kind of pulsewidth limiting circuit of inverter | |
| CN204668922U (en) | A kind of module power supply short-circuit protective circuit | |
| CN104577966A (en) | Overvoltage protection circuit | |
| CN103143812A (en) | Automatic thrust and arc striking system for digital inversion arc welder | |
| CN203636179U (en) | Protective device for electric welding machine | |
| CN204334538U (en) | A kind of small area analysis high-end drive circuit |
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: 20140618 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |