CN108296604B - Constant power control device for welding machine - Google Patents
Constant power control device for welding machine Download PDFInfo
- Publication number
- CN108296604B CN108296604B CN201810200406.2A CN201810200406A CN108296604B CN 108296604 B CN108296604 B CN 108296604B CN 201810200406 A CN201810200406 A CN 201810200406A CN 108296604 B CN108296604 B CN 108296604B
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- capacitor
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- 238000003466 welding Methods 0.000 title claims abstract description 89
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 230000001276 controlling effect Effects 0.000 claims abstract description 3
- 239000003990 capacitor Substances 0.000 claims description 40
- 238000010586 diagram Methods 0.000 description 11
- 229920002678 cellulose Polymers 0.000 description 9
- 239000001913 cellulose Substances 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- B23K9/095—Monitoring or automatic control of welding parameters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The invention discloses a constant power control device for a welding machine, which comprises: the constant power control unit outputs a voltage according to the panel given signal, the arc voltage feedback signal and the reference signal; the voltage delay control unit is turned on or turned off according to the polarity of the voltage; and the current regulating unit is used for controlling the load current of the welding machine according to the voltage value when the voltage delay control unit is conducted.
Description
Technical Field
The invention relates to the technical field of welding machines, in particular to a constant power control device for a welding machine.
Background
In the prior art, flammable and explosive energy sources such as petroleum and natural gas are transported in underground pipelines, the welding requirements on the transport pipelines are very high, corrosion resistance is required, and the requirements cannot be met by common welding rods. The biggest disadvantage of common welding rods is that they are not oxidation resistant. Therefore, the welding seam of the common welding rod can oxidize and the strength is reduced after long-time use. The problems of pipeline leakage and the like are easily caused after the welding seams are oxidized, and huge potential safety hazards exist. In order to avoid pipeline leakage in the prior art, pipeline maintenance is needed, so that the management and operation cost of underground pipelines can be increased.
The common welding rod is not suitable for welding transportation pipelines, so that special cellulose welding rods are needed for pipeline welding to prevent oxidation at the welding position. At present, a cellulose welding rod is mostly adopted for sealing the bottom in pipeline construction, and the welding rod has the characteristics of large penetration depth, strong penetrating power, single-side welding and double-side forming, small air hole sensitivity and the like when being used for vertically downwards welding, and is suitable for backing welding of thick-wall containers and steel pipe bottom layers.
Cellulose electrodes require a higher load voltage to stabilize the weld than conventional electrodes. The diameters of the cellulose welding rods are different, and the welding current is also different in requirements. Simply adding to the overall output capability when designing a welder power supply increases costs and results in an overall weight increase of the welder equipment. If the constant power control can be realized in the welding machine, the load output can be automatically adjusted when other high-current welding rods are used on the premise of meeting the use requirement, and meanwhile, the burden and consumption of components are reduced.
Disclosure of Invention
In view of the above, the present invention provides a constant power control device for a welding machine, which can automatically adjust a load current to maintain constant power according to a change of a welding current so as to ensure stability of welding.
In order to achieve the above object, the present invention discloses a constant power control device for a welder, comprising: the constant power control unit outputs a voltage according to the panel given signal, the arc voltage feedback signal and the reference signal; the voltage delay control unit is turned on or turned off according to the polarity of the voltage; and the current regulating unit is used for controlling the load current of the welding machine according to the voltage value when the voltage delay control unit is conducted.
Further, the constant power control unit compares the panel given signal, the arc voltage feedback signal and the reference signal and then outputs a positive voltage signal or a negative voltage signal.
Further, the constant power control unit includes operational amplifiers U9B, U C and U9D, resistors R64, R61, R65 and R69, where the positive electrode of the operational amplifier U9B is connected to the arc voltage feedback signal, and the negative electrode is connected to the output end and the resistor R64; the positive electrode of the operational amplifier U9C is connected with a given signal of the panel, and the negative electrode is connected with the output end and the resistor R61; one end of the resistor R55 is connected with a reference signal, and the other end is connected with resistors R61, R64 and R65; the negative electrode of the operational amplifier U9D is connected with R65, the positive electrode is connected with R69, and the output end is connected with a voltage delay control unit; the other end of the resistor R69 is grounded.
Further, the reference signal is at-15V.
Further, the voltage delay control unit includes a capacitor and a diode, the capacitor is used for realizing delay control, the diode is turned on when the voltage is positive, and the diode is turned off when the voltage is negative.
Further, the voltage delay control unit includes a capacitor C33, a resistor R68, and a diode D26, one end of the capacitor and the resistor R69 are connected to the negative electrode of the operational amplifier U9D, the other end is connected to the output end of the operational amplifier, and one end of the diode D25 is connected to the output end of the operational amplifier U9D, the capacitor C33, and the resistor R68.
Further, the current adjusting unit includes a variable resistor W1 and an operational amplifier U3A, U B, the movable pin of the variable resistor is connected to the positive electrode of the operational amplifier U3A, and the fixed pin of the variable resistor is connected to the negative electrode and the output terminal of the operational amplifier U3B, respectively.
Furthermore, the current adjusting unit further comprises a capacitor C4 and a zener diode ZD3, wherein the capacitor C4 is connected in parallel with the zener diode ZD3, one end of the capacitor C4 is connected with the voltage delay control unit, and the other end of the capacitor C is connected with the output end of the operational amplifier U3B.
Furthermore, the given signal of the panel is obtained after the voltage is divided by the resistors R2 and R15, one end of the resistor R2 is connected with the other end of the welding machine panel, the resistor R15 and the constant power control unit are connected, and the other end of the resistor R15 is grounded.
Furthermore, the arc voltage feedback signal is collected by an arc voltage feedback unit, the arc voltage feedback unit comprises resistors R13, R8 and R11, capacitors C7, C8 and C5 and an optocoupler U2, the resistors R13 and R11 are respectively connected with pins of an arc voltage feedback input Wvin, one end of the resistor C8 is connected with the resistors R13 and R8 and the capacitor C7, the other end is connected with the other ends of the resistors R11 and C7, the other end of the resistor R8 is connected with the input end of the optocoupler U2, the output end of the optocoupler U2 is connected with Vcc and the capacitor C5, and the other end of the capacitor C5 is grounded.
Compared with the prior art, the constant power control device for the welding machine can obtain the welding power of the welding machine at the moment by detecting the voltage fed back by the arc voltage and combining the current welding current of the welding machine. When the welding current of the welding machine changes, the welding machine automatically adjusts the load voltage to ensure the constant welding power, thereby not only meeting the welding requirement of a cellulose welding rod, but also improving the welding stability.
Drawings
The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:
FIG. 1 is a functional block diagram of a constant power control device for a welder provided by the present invention;
FIG. 2 is a hardware schematic of a welder provided by the present invention;
FIG. 3 is a hardware schematic diagram of a panel signal acquisition unit of the constant power control device provided by the invention;
FIG. 4 is a hardware schematic diagram of an arc voltage feedback signal acquisition unit of the constant power control device provided by the invention;
FIG. 5 is a hardware schematic diagram of a constant power control unit and a voltage delay control unit of the constant power control device provided by the invention;
fig. 6 is a hardware schematic diagram of a current adjusting unit of the constant power control device provided by the invention.
Detailed Description
The invention provides a welding machine suitable for welding cellulose welding rods, which is provided with a constant power control device, and the welding power of the welding machine at the moment can be obtained by detecting the voltage fed back by the arc voltage and combining the current welding current of the welding machine. When the welding current of the welding machine changes, the welding machine automatically adjusts the load voltage to ensure the constant welding power, thereby not only meeting the welding requirement of a cellulose welding rod, but also improving the welding stability.
To make the objects, advantages and features of the present invention more apparent, the following describes the constant power control device according to the present invention in further detail with reference to fig. 1 to 6. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
As shown in fig. 1, fig. 1 is a functional block diagram of a constant power control device for a welder provided by the present invention. The welder is provided with a constant power control device, and the welding power of the welder at the moment can be obtained by detecting the voltage fed back by the arc voltage and combining the current welding current of the welder. When the welding current of the welding machine changes, the welding machine automatically adjusts the load voltage to ensure the constant welding power, thereby not only meeting the welding requirement of a cellulose welding rod, but also improving the welding stability. Specifically, the constant power control device includes a constant power control unit 40, and the constant power control unit 40 outputs a voltage according to the panel given signal 10, the arc voltage feedback signal 20 and the reference signal 30; a voltage delay control unit 50, the voltage delay control unit 50 being turned on or off according to the polarity of the voltage signal; and a current adjusting unit 60, wherein the current adjusting unit 60 controls the load current of the welding machine according to the voltage signal when the voltage delay control unit 50 is turned on. Preferably, the constant power control device further comprises a PI (proportional integral) adjustment unit.
The structure of the constant power control device and how to ensure the welding power to be stable will be described in detail with reference to fig. 2 to 6.
Fig. 2 is a schematic diagram of hardware of the welder provided by the present invention, in which the welder includes an original hardware circuit of the welder in addition to the constant power control device described with an emphasis of the present invention, because the circuit is not an emphasis of the present invention and therefore is not described one by one. As shown in fig. 2, the panel given signal MET and the ARC voltage feedback signal ARC are respectively overlapped with the reference signal through the values obtained by the operational amplifier follower circuit, and the overlapped signals are input into the operational amplifier and pass through the voltage delay control unit to obtain the definition signal. The define signal is a constant power control signal. The follow-up current adjusting unit controls the load current of the welding machine to rise or fall through the change of the definition signal so as to achieve the purpose of constant power control of the welding machine.
Fig. 3 is a hardware schematic diagram of a panel signal acquisition unit of the constant power control device provided by the invention. As shown in fig. 3, the panel signal acquisition unit is configured to acquire a panel given voltage MET, where the panel given voltage MET is divided by R2 and R15 resistors to obtain a voltage value, and the voltage value is input to pin 10 (positive input end) of the operational amplifier U9C. The SP signal in fig. 3 is an overheat or overcurrent protection signal, the T/M is a manual or argon arc welding selection signal, and only the panel given voltage MET is related to the constant power control device.
Fig. 4 is a hardware schematic diagram of an arc voltage feedback signal acquisition unit of the constant power control device provided by the invention. WVIN reads ARC voltage feedback (ARC) of the welding machine, and the obtained voltage is subjected to superposition comparison of the given voltage MET of the panel after passing through the following circuit U9B. As shown in fig. 4, the arc voltage feedback signal is collected by an arc voltage feedback unit, the arc voltage feedback unit includes resistors R13, R8, R11, capacitors C7, C8, C5 and an optocoupler U2, the resistors R13 and R11 are respectively connected to pins of Wvin, one end of the resistor C8 is connected to the resistors R13, R8 and the capacitor C7, the other end is connected to the other ends of the resistors R11 and C7, the other end of the resistor R8 is connected to the input end of the optocoupler U2, the output end of the optocoupler U2 is connected to Vcc and the capacitor C5, and the other end of the capacitor C5 is grounded.
The reference signal adopted in the invention is a negative 15V voltage signal, and the 15V voltage participates in the superposition of the voltages after passing through the resistor R55. The ARC voltage feedback voltage ARC and the panel given voltage MET and the 15V reference voltage participate in comparison. When the compared voltage is positive voltage, the voltage passes through the voltage delay control unit, the diode D26 is conducted, the definition signal is input into the current regulating circuit, the constant power control circuit starts to work, and the output power of the welding machine is regulated to maintain constant power. When the compared voltage is negative voltage, the voltage passes through the voltage delay control unit, the diode D26 is not conducted, the definition signal is not input into the current regulating circuit, the constant power control circuit does not work, and the welding machine normally welds.
Fig. 5 is a hardware schematic diagram of the constant power control unit and the voltage delay control unit provided by the invention. As shown in fig. 5, the constant power control unit compares a panel given signal, an arc voltage feedback signal and a reference signal and outputs a positive voltage signal or a negative voltage signal. The comparison result is that the positive voltage causes the constant power control unit to work, and the comparison result is that the negative voltage causes the constant power control unit to not work.
The constant power control unit comprises operational amplifiers U9B, U C and U9D, resistors R64, R61, R65 and R69, wherein the positive electrode of the operational amplifier U9B is connected with an arc voltage feedback signal, and the negative electrode of the operational amplifier U9B is connected with the output end and the resistor R64; the positive electrode of the operational amplifier U9C is connected with a given signal of the panel, and the negative electrode is connected with the output end and the resistor R61; one end of the resistor R55 is connected with a reference signal, and the other end is connected with resistors R61, R64 and R65; the negative electrode of the operational amplifier U9D is connected with R65, the positive electrode is connected with R69, and the output end is connected with a voltage delay control unit; the other end of the resistor R69 is grounded.
The voltage delay control unit comprises a capacitor and a diode, wherein the capacitor is used for realizing delay control, the voltage is positive, the diode is conducted, and when the voltage is negative, the diode is turned off. The voltage delay control unit comprises a capacitor C33, a resistor R68 and a diode D26, wherein one end of the capacitor and one end of the resistor R69 are connected with the negative electrode of the operational amplifier U9D, the other end of the capacitor and one end of the resistor R69 are connected with the output end of the operational amplifier U9D, and one end of the diode D25 is connected with the output end of the operational amplifier U9D, the capacitor C33 and the resistor R68.
Fig. 6 is a hardware schematic diagram of a current adjusting unit of the constant power control device provided by the invention. As shown in fig. 6, the current adjusting unit changes the value of the positive input terminal of the operational amplifier by using the resistance change of the variable resistor, so as to control the load current of the welding machine to rise or fall. Specifically, the current adjusting unit includes a variable resistor W1 and an operational amplifier U3A, U B, wherein a moving pin of the variable resistor is connected to a positive electrode of the operational amplifier U3A, and a fixed pin of the variable resistor is connected to a negative electrode and an output end of the operational amplifier U3B, respectively. The current regulating unit further comprises a capacitor C4 and a zener diode ZD3, wherein the capacitor C4 is connected with the zener diode ZD3 in parallel, one end of the capacitor C4 is connected with the voltage delay control unit, and the other end of the capacitor C is connected with the output end of the operational amplifier U3B.
Compared with the prior art, the constant power control device for the welding machine can obtain the welding power of the welding machine at the moment by detecting the voltage fed back by the arc voltage and combining the current welding current of the welding machine. When the welding current of the welding machine changes, the welding machine automatically adjusts the load voltage to ensure the constant welding power, thereby not only meeting the welding requirement of a cellulose welding rod, but also improving the welding stability.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (4)
1. A constant power control device for a welder, comprising:
the constant power control unit outputs a voltage signal according to the panel given signal, the arc voltage feedback signal and the reference signal;
the voltage delay control unit is turned on or turned off according to the polarity of the voltage signal;
the current adjusting unit is used for controlling the load current of the welding machine according to the voltage signal when the voltage delay control unit is conducted;
the constant power control unit compares a panel given signal, an arc voltage feedback signal and a reference signal and then outputs a positive voltage signal or a negative voltage signal;
the constant power control unit comprises an operational amplifier U9B, U C and U9D, resistors R64, R61, R65, R55 and R69, wherein the positive electrode of the operational amplifier U9B is connected with an arc voltage feedback signal, and the negative electrode of the operational amplifier U9B is connected with the output end and the resistor R64; the positive electrode of the operational amplifier U9C is connected with a given signal of the panel, and the negative electrode of the operational amplifier U9C is connected with the output end and the resistor R61; one end of the resistor R55 is connected with a reference signal, and the other end of the resistor R55 is connected with resistors R61, R64 and R65; the negative electrode of the operational amplifier U9D is connected with R65, the positive electrode of the operational amplifier U9D is connected with R69, and the output end of the operational amplifier U9D is connected with a voltage delay control unit; the other end of the resistor R69 is grounded;
the reference signal is a-15V voltage signal;
the voltage delay control unit comprises a capacitor and a diode, wherein the capacitor is used for realizing delay control, the voltage signal is positive, the diode is turned on, and when the voltage signal is negative, the diode is turned off;
the voltage delay control unit comprises a capacitor C33, a resistor R68 and a diode D26, wherein one ends of the capacitor C33 and the resistor R69 are connected with the negative electrode of the operational amplifier U9D, the other ends of the capacitor C33 and the resistor R69 are connected with the output end of the operational amplifier U9D, and one end of the diode D26 is connected with the output end of the operational amplifier U9D, the capacitor C33 and the resistor R68;
the current adjusting unit comprises a variable resistor W1 and an operational amplifier U3A, U B, wherein a moving plate pin of the variable resistor W1 is connected with a positive electrode of the operational amplifier U3A, and a fixed plate pin of the variable resistor W1 is respectively connected with a negative electrode and an output end of the operational amplifier U3B.
2. The constant power control device according to claim 1, wherein the current regulating unit further comprises a capacitor C4 and a zener diode ZD3, the capacitor C4 is connected in parallel with the zener diode ZD3, one end is connected to the voltage delay control unit, and the other end is connected to the output end of the operational amplifier U3B.
3. The constant power control device according to claim 1, wherein the given signal of the panel is obtained by dividing the voltage of resistors R2 and R15, one end of the resistor R2 is connected with the other end of the welding machine panel, the other end of the resistor R2 is connected with the resistor R15 and the constant power control unit, and the other end of the resistor R15 is grounded.
4. The constant power control device according to claim 1, wherein the arc voltage feedback signal is collected by an arc voltage feedback unit, the arc voltage feedback unit includes resistors R13, R8, R11, capacitors C7, C8, C5, and an optocoupler U2, the resistors R13 and R11 are respectively connected to pins of the arc voltage feedback input Wvin, one end of the capacitor C8 is connected to the resistors R13, R8 and the capacitor C7, the other end is connected to the other ends of the resistors R11 and C7, the other end of the resistor R8 is connected to an input end of the optocoupler U2, an output end of the optocoupler U2 is connected to Vcc and the capacitor C5, and the other end of the capacitor C5 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200406.2A CN108296604B (en) | 2018-03-12 | 2018-03-12 | Constant power control device for welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200406.2A CN108296604B (en) | 2018-03-12 | 2018-03-12 | Constant power control device for welding machine |
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| Publication Number | Publication Date |
|---|---|
| CN108296604A CN108296604A (en) | 2018-07-20 |
| CN108296604B true CN108296604B (en) | 2023-12-12 |
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| CN201810200406.2A Active CN108296604B (en) | 2018-03-12 | 2018-03-12 | Constant power control device for welding machine |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3391322A (en) * | 1965-11-30 | 1968-07-02 | Atomic Energy Commission Usa | Constant power regulator with variable voltage boost |
| CN1380157A (en) * | 2001-04-09 | 2002-11-20 | 林肯环球公司 | System and method for controlling electric-arc welding machine |
| KR20040056238A (en) * | 2002-12-23 | 2004-06-30 | 주식회사 포스코 | constant power controlling device and method for resistance welder |
| CN102522902A (en) * | 2011-12-23 | 2012-06-27 | 杨云柳 | Consistent-harmonic oscillation type switching power supply |
| CN204119072U (en) * | 2014-11-11 | 2015-01-21 | 河北工程技术高等专科学校 | The two PWM source of welding current of Direct Current Control |
| CN105562888A (en) * | 2016-01-27 | 2016-05-11 | 上海广为焊接设备有限公司 | Welding machine rated power limitation system based on dual PI inhibition |
| CN106956061A (en) * | 2017-04-25 | 2017-07-18 | 南通市慧冠智能科技有限公司 | Source of welding current power output changes acts closed loop control method with arc welding robot |
| CN107052525A (en) * | 2017-04-22 | 2017-08-18 | 河北亚峰专用汽车制造有限公司 | A kind of welding equipment of the constant welding method of bonding power and application this method |
| CN207952887U (en) * | 2018-03-12 | 2018-10-12 | 上海威特力焊接设备制造股份有限公司 | Constant power control device for welding machine |
-
2018
- 2018-03-12 CN CN201810200406.2A patent/CN108296604B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3391322A (en) * | 1965-11-30 | 1968-07-02 | Atomic Energy Commission Usa | Constant power regulator with variable voltage boost |
| CN1380157A (en) * | 2001-04-09 | 2002-11-20 | 林肯环球公司 | System and method for controlling electric-arc welding machine |
| KR20040056238A (en) * | 2002-12-23 | 2004-06-30 | 주식회사 포스코 | constant power controlling device and method for resistance welder |
| CN102522902A (en) * | 2011-12-23 | 2012-06-27 | 杨云柳 | Consistent-harmonic oscillation type switching power supply |
| CN204119072U (en) * | 2014-11-11 | 2015-01-21 | 河北工程技术高等专科学校 | The two PWM source of welding current of Direct Current Control |
| CN105562888A (en) * | 2016-01-27 | 2016-05-11 | 上海广为焊接设备有限公司 | Welding machine rated power limitation system based on dual PI inhibition |
| CN107052525A (en) * | 2017-04-22 | 2017-08-18 | 河北亚峰专用汽车制造有限公司 | A kind of welding equipment of the constant welding method of bonding power and application this method |
| CN106956061A (en) * | 2017-04-25 | 2017-07-18 | 南通市慧冠智能科技有限公司 | Source of welding current power output changes acts closed loop control method with arc welding robot |
| CN207952887U (en) * | 2018-03-12 | 2018-10-12 | 上海威特力焊接设备制造股份有限公司 | Constant power control device for welding machine |
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| Publication number | Publication date |
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| CN108296604A (en) | 2018-07-20 |
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