CN108115251A - Arc welder zero load determination methods and circuit - Google Patents
Arc welder zero load determination methods and circuit Download PDFInfo
- Publication number
- CN108115251A CN108115251A CN201711456879.0A CN201711456879A CN108115251A CN 108115251 A CN108115251 A CN 108115251A CN 201711456879 A CN201711456879 A CN 201711456879A CN 108115251 A CN108115251 A CN 108115251A
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- China
- Prior art keywords
- arc welder
- arc
- voltage
- zero load
- output voltage
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
Abstract
The invention discloses a kind of arc welder zero load determination methods, detect the output voltage U1 of the welding machine electric power of arc welder and input voltage U2 in real time, and same are multiplied by after a downsampling factor A of present input voltage U2 is obtained current false floating voltage U3；If the difference that current vacation floating voltage U3 subtracts current output voltage U1 is more than false unloaded threshold values B, judge that arc welder loads, otherwise judge arc welder zero load, threshold values B is equal to 5% to the 20% of arc welder rated no-load output voltage.The invention also discloses a kind of arc welder zero load decision circuitries.The present invention can reduce influence of the input voltage fluctuation to the whether unloaded judgement of arc welder, improve judge arc welder whether unloaded accuracy.
Description
Technical field
The present invention relates to arc welder, more particularly to a kind of arc welder zero load determination methods and circuit.
Background technology
Arc Welding Power is the core in arc welder, is that one kind of electric energy is special to be set for providing welding arc
It is standby.Because electric arc is a kind of special load, the requirement for Arc Welding Power is slightly different with common power, this will basis
The characteristic of required electric arc changes.
The floating voltage of arc welder is exactly " standby " voltage of welding machine before striking.Comparatively, floating voltage is higher
Easier success striking, and ensure the stability of welding arc during particularly small current welding.But arc welder floating voltage
Higher, welder power factor is lower, can cause unnecessary electric energy loss, not only increases welding machine manufacture cost, can also increase
Welding machine weight, meanwhile, higher floating voltage can cause larger danger to welding personnel safety.To ensure that Arc Welding Power does not weld
When connecing major loop is allowed to be stopped, reduce fever and increase the reliability of power supply, the selection of floating voltage neither influences the starting the arc
Major loop cannot can be allowed to break in high arc voltage ShiShimonoseki excessively again.China provides：AX arc generators floating voltage is not more than 100V, and ZX is straight
Arc-welding machine floating voltage is flowed no more than 90V, and BX no-load of A. C. arc welder voltage is not more than 80V.
Control mode of the control system of Arc Welding Power under unloaded and load two states can have any different, therefore unloaded shape
The judgement of state and load condition is more crucial for Arc Welding Power control system.Existing Arc Welding Power zero load judgement scheme
Have：
(1) lead to over-current judging, thought when output current is more than given threshold for load condition, when output current is less than
It is light condition during given threshold.Logical over-current judging, threshold value setting is too small easily to cause erroneous judgement, sets too big, low current
System cannot work.
(2) judged by voltage, when output voltage is thought more than given threshold for light condition, set when output voltage is less than
It is load condition to determine during threshold value.Judged by voltage, advantage is that solve electric current decision problem, and low current work can be made steady
It is fixed, but can input voltage fluctuation influence.As shown in Figure 1, when Arc Welding Power output voltage U1 be less than one setting threshold values U4, then
Judge arc welder load, otherwise judge that arc welder is unloaded.Due to Arc Welding Power input voltage U2 it is unstable, can cause
The output voltage U1 of Arc Welding Power output voltage Arc Welding Power changes, and since threshold values U4 is fixed value, judges arc welder
Whether unloaded accuracy can because input voltage U2 it is unstable due to reduce.
The content of the invention
The technical problem to be solved by the present invention is to reduce shadow of the input voltage fluctuation to the whether unloaded judgement of arc welder
It rings, improves the accuracy for judging whether arc welder is unloaded.
In order to solve the above technical problems, arc welder zero load determination methods provided by the invention, comprise the following steps：
One, detects the output voltage U1 of the welding machine electric power of arc welder and input voltage U2 in real time, and will currently input electricity
Pressure U2 obtains current false floating voltage U3 after being multiplied by a downsampling factor A together；
If the difference that the current vacation floating voltage U3 of two, subtract current output voltage U1 is more than false unloaded threshold values B, then judge
Arc welder loads, otherwise judges arc welder zero load, and threshold values B is to be arrived equal to the 5% of arc welder rated no-load output voltage
20%.
It is determined preferably, the downsampling factor A derives binding tests according to the circuit of welding machine electric power.
Preferably, the false unloaded threshold values B be arc welder rated no-load output voltage 5%, 10%, 14% or
20%.
Preferably, the welding machine electric power is AC arc welding power source, electricity source for dc arc welding, arc welding inverter or pulsed arc welding are electric
Source.
In order to solve the above technical problems, arc welder zero load decision circuitry provided by the invention, is examined including output voltage
Slowdown monitoring circuit, input voltage detection circuit, counting circuit and decision circuitry；
The output voltage detecting circuit, for detecting the output voltage U1 of the welding machine electric power of arc welder in real time and exporting
To the decision circuitry；
The input voltage detection circuit, for detecting the input voltage U2 of the welding machine electric power of arc welder in real time and exporting
To the counting circuit；
The counting circuit, the input voltage U2 for the input voltage detection circuit to be detected are multiplied by a downsampling factor
Current vacation floating voltage U3 is obtained after A and is output to the decision circuitry；
The decision circuitry, it is empty with vacation for the difference after current vacation floating voltage U3 is subtracted each other with current output voltage U1
Threshold values B is carried to compare, it is defeated if the difference that current vacation floating voltage U3 subtracts current output voltage U1 is more than false unloaded threshold values B
Go out the status signal of arc welder load, status signal that is on the contrary then exporting arc welder zero load, threshold values B is equal to arc welder
5% to the 20% of rated no-load output voltage.
The arc welder zero load determination methods and circuit of the present invention, by same current defeated thus according to current false floating voltage U3
The difference for going out voltage U1 judges, and current vacation floating voltage U3 is linearly related with present input voltage U2, so working as input voltage
When U2 is fluctuated, current vacation floating voltage U3 and current output voltage U1 is fluctuated in the same direction, reduces input voltage fluctuation to arc welding
The influence of the whether unloaded judgement of machine, improve judge arc welder whether unloaded accuracy.
Description of the drawings
In order to illustrate more clearly of technical scheme, the required attached drawing of the present invention is made below simple
It introduces, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for ordinary skill people
For member, without creative efforts, other attached drawings are can also be obtained according to these attached drawings.
Fig. 1 is existing Arc Welding Power zero load determination methods flow chart；
Fig. 2 is one embodiment flow chart of arc welder zero load determination methods of the present invention；
Fig. 3 is the one embodiment electrical block diagram of arc welder zero load decision circuitry of the present invention.
Specific embodiment
Below in conjunction with attached drawing, clear, complete description is carried out to the technical solution in the present invention, it is clear that described
Embodiment is the part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
All other embodiment that logical technical staff is obtained on the premise of creative work is not made, belongs to protection of the present invention
Scope.
Embodiment one
Arc welder zero load determination methods, as shown in Fig. 2, comprising the following steps：
One, detects the output voltage U1 of the welding machine electric power of arc welder and input voltage U2 in real time, and will currently input electricity
Pressure U2 obtains current false floating voltage U3 after being multiplied by a downsampling factor A together；
If the difference that the current vacation floating voltage U3 of two, subtract current output voltage U1 is more than false unloaded threshold values B, then judge
Arc welder loads, otherwise judges arc welder zero load, and threshold values B is to be arrived equal to the 5% of arc welder rated no-load output voltage
20%.
It is determined preferably, the downsampling factor A derives binding tests according to the circuit of welding machine electric power.
Preferably, false zero load threshold values B is 5%, 10%, 14% or the 20% of arc welder rated no-load output voltage.
Preferably, welding machine electric power can be AC arc welding power source, electricity source for dc arc welding, arc welding inverter or pulsed arc welding electricity
Source etc..
The arc welder zero load determination methods of embodiment one, by electric with current output thus according to current false floating voltage U3
The difference of U1 is pressed to judge, and current vacation floating voltage U3 is linearly related with present input voltage U2, so when input voltage U2 ripples
When dynamic, current vacation floating voltage U3 and current output voltage U1 is fluctuated in the same direction, reduce input voltage fluctuation to arc welder
Whether the influence of unloaded judgement, can in the case where input net voltage fluctuation accurate judgement, improving judgement arc welder is
The accuracy of no zero load.
Embodiment two
As shown in figure 3, arc welder zero load decision circuitry, including output voltage detecting circuit, input voltage detection circuit,
Counting circuit and decision circuitry；
The output voltage detecting circuit, for detecting the output voltage U1 of the welding machine electric power of arc welder in real time, and it is defeated
Go out to the decision circuitry；
The input voltage detection circuit, for detecting the input voltage U2 of the welding machine electric power of arc welder in real time, and it is defeated
Go out to the counting circuit；
The counting circuit, the input voltage U2 for the input voltage detection circuit to be detected are multiplied by a downsampling factor
Current false floating voltage U3 is obtained after A, and is output to the decision circuitry；
The decision circuitry, it is empty with vacation for the difference after current vacation floating voltage U3 is subtracted each other with current output voltage U1
Threshold values B is carried to compare, it is defeated if the difference that current vacation floating voltage U3 subtracts current output voltage U1 is more than false unloaded threshold values B
Go out the status signal of arc welder load, status signal that is on the contrary then exporting arc welder zero load, threshold values B is equal to arc welder
5% to the 20% of rated no-load output voltage.
It is determined preferably, the downsampling factor A derives binding tests according to the circuit of welding machine electric power.
Preferably, false zero load threshold values B is 5%, 10%, 14% or the 20% of arc welder rated no-load output voltage.
Preferably, welding machine electric power can be AC arc welding power source, electricity source for dc arc welding, arc welding inverter or pulsed arc welding electricity
Source etc..
The arc welder zero load decision circuitry of embodiment two, by electric with current output thus according to current false floating voltage U3
The difference of U1 is pressed to judge, and current vacation floating voltage U3 is linearly related with present input voltage U2, so when input voltage U2 ripples
When dynamic, current vacation floating voltage U3 and current output voltage U1 is fluctuated in the same direction, and reduce input voltage fluctuation is to arc welder
The influence of the judgement of no zero load improves the accuracy for judging whether arc welder is unloaded.
It these are only the preferred embodiment of the application, be not used to limit the application.Come for those skilled in the art
It says, the application can have various modifications and variations.All any modifications within spirit herein and principle, made are equal
Replace, improve etc., it should be included within the protection domain of the application.
Claims (8)
1. a kind of arc welder zero load determination methods, which is characterized in that comprise the following steps：
One, detects the output voltage U1 of the welding machine electric power of arc welder and input voltage U2 in real time, and by present input voltage U2
Current false floating voltage U3 is obtained with being multiplied by after a downsampling factor A；
If the difference that the current vacation floating voltage U3 of two, subtract current output voltage U1 is more than false unloaded threshold values B, then electric arc is judged
Welding machine loads, otherwise judges arc welder zero load, and threshold values B is equal to 5% to the 20% of arc welder rated no-load output voltage.
2. arc welder zero load determination methods according to claim 1, which is characterized in that
The downsampling factor A derives binding tests according to the circuit of welding machine electric power and determines.
3. arc welder zero load determination methods according to claim 1, which is characterized in that
The false unloaded threshold values B is 5%, 10%, 14% or the 20% of arc welder rated no-load output voltage.
4. arc welder zero load determination methods according to claim 1, which is characterized in that
The welding machine electric power is AC arc welding power source, electricity source for dc arc welding, arc welding inverter or pulsed arc-welding power source.
5. a kind of arc welder zero load decision circuitry, which is characterized in that including output voltage detecting circuit, input voltage measurement electricity
Road, counting circuit and decision circuitry；
The output voltage detecting circuit, for detecting the output voltage U1 of the welding machine electric power of arc welder in real time and being output to institute
State decision circuitry；
The input voltage detection circuit, for detecting the input voltage U2 of the welding machine electric power of arc welder in real time and being output to institute
State counting circuit；
The counting circuit, after the input voltage U2 for the input voltage detection circuit to be detected is multiplied by a downsampling factor A
It obtains current vacation floating voltage U3 and is output to the decision circuitry；
The decision circuitry, for the difference after current vacation floating voltage U3 is subtracted each other with current output voltage U1 with false idler valve
Value B compares, if the difference that current vacation floating voltage U3 subtracts current output voltage U1 is more than false unloaded threshold values B, exports electricity
The status signal of arc-welding machine load, status signal that is on the contrary then exporting arc welder zero load, threshold values B are specified equal to arc welder
5% to the 20% of idle voltage output.
6. arc welder zero load decision circuitry according to claim 5, which is characterized in that
The downsampling factor A derives binding tests according to the circuit of welding machine electric power and determines.
7. arc welder zero load decision circuitry according to claim 5, which is characterized in that
The false unloaded threshold values B is 5%, 10%, 14% or the 20% of arc welder rated no-load output voltage.
8. arc welder zero load decision circuitry according to claim 5, which is characterized in that the welding machine electric power is AC arc
Weld power supply, electricity source for dc arc welding, arc welding inverter or pulsed arc-welding power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711456879.0A CN108115251B (en) | 2017-12-28 | 2017-12-28 | No-load judging method and circuit for arc welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711456879.0A CN108115251B (en) | 2017-12-28 | 2017-12-28 | No-load judging method and circuit for arc welder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108115251A true CN108115251A (en) | 2018-06-05 |
| CN108115251B CN108115251B (en) | 2023-10-03 |
Family
ID=62232105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711456879.0A Active CN108115251B (en) | 2017-12-28 | 2017-12-28 | No-load judging method and circuit for arc welder |
Country Status (1)
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| CN (1) | CN108115251B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110625220A (en) * | 2018-06-22 | 2019-12-31 | 上海文顺电器有限公司 | Intelligent testing and debugging device and method for electric welding machine |
| CN116754986A (en) * | 2023-08-10 | 2023-09-15 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110625220A (en) * | 2018-06-22 | 2019-12-31 | 上海文顺电器有限公司 | Intelligent testing and debugging device and method for electric welding machine |
| CN110625220B (en) * | 2018-06-22 | 2023-06-23 | 上海文顺电器有限公司 | Intelligent inspection and debugging device and method for electric welding machine |
| CN116754986A (en) * | 2023-08-10 | 2023-09-15 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
| CN116754986B (en) * | 2023-08-10 | 2023-11-07 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
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|---|---|
| CN108115251B (en) | 2023-10-03 |
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