CN220050374U - Optocoupler driving circuit of alternating current submerged arc welding machine - Google Patents
Optocoupler driving circuit of alternating current submerged arc welding machine Download PDFInfo
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- CN220050374U CN220050374U CN202321211264.2U CN202321211264U CN220050374U CN 220050374 U CN220050374 U CN 220050374U CN 202321211264 U CN202321211264 U CN 202321211264U CN 220050374 U CN220050374 U CN 220050374U
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- 238000003466 welding Methods 0.000 title claims abstract description 15
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 claims abstract description 23
- 101150105073 SCR1 gene Proteins 0.000 claims abstract description 23
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 claims abstract description 23
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 claims abstract description 21
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims 1
- 239000013078 crystal Substances 0.000 description 6
- 230000006855 networking Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
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Abstract
The utility model relates to an optocoupler driving circuit of an alternating current submerged arc welding machine, which comprises an optocoupler thyristor PC1, resistors R1-R4, a power thyristor SCR1 and an SCR2, a load RL is electrically connected with a diode D1, a 3 pin of the optocoupler thyristor PC1 is electrically connected with a control electrode of the power thyristor SCR2, an input end of the power thyristor SCR2 is connected with U through a resistor R3, an output end of the power thyristor SCR2 is connected with a control electrode of the power thyristor SCR1 through the diode D1, the resistor R2 is connected between an output end and the control electrode of the power thyristor SCR2, an input end of the power thyristor SCR1 is connected with U, and an output end of the power thyristor SCR1 is connected with the load RL. The optocoupler thyristor is applied to a drive circuit of a high-power thyristor of an alternating-current submerged arc welding power supply, no additional power supply is needed, the circuit structure is simple, the parameter consistency is good, and the reliability is high.
Description
Technical Field
The utility model relates to the technical field of alternating-current submerged arc welding control circuits, in particular to an optocoupler driving circuit of an alternating-current submerged arc welding machine.
Background
The driving circuit in the welder is used for generating a driving signal to be applied between the control electrode and the cathode of the high-power thyristor so as to control the conduction of the thyristor and realize the regulation of the output size of the alternating-current arc welding power supply. At present, in the traditional AC submerged arc welding machine, a circuit for driving a thyristor mainly comprises a single-crystal tube type driving circuit, a transistor type driving circuit and a program-controlled single-crystal tube type driving circuit. The single-crystal tube type driving circuit adopts a single-crystal tube as a driving device, has small triggering power, large parameter discreteness and difficult debugging, and is basically eliminated in the welding field. The transistor type driving circuit adopts a triode as a driving device, a pre-driving pulse transformer and a re-driving thyristor, because the pulse transformer needs to be driven by a narrow pulse sequence, the circuit is complex, the reliability is low, the transistor type driving circuit is only suitable for analog circuit control and is not suitable for the existing digital networking circuit control mode, and the program control single crystal transistor type driving circuit improves the defects of a single crystal transistor, but still needs the pre-driving pulse transformer, and has the same defects as the transistor type driving circuit in driving the thyristor, so the traditional thyristor driving circuit needs to be improved.
Disclosure of Invention
Accordingly, it is desirable to provide an optocoupler drive circuit for an ac submerged arc welder in response to the above-described problems.
The utility model provides an AC submerged arc welding machine's opto-coupler drive circuit, includes opto-coupler thyristor PC1, resistance R1 ~ R4, power thyristor SCR1 and SCR2, load RL and diode D1, opto-coupler thyristor PC 1's 1 foot is connected with the power through resistance R4, opto-coupler thyristor PC 1's 2 foot is used for receiving the phase shift signal that the singlechip sent, opto-coupler thyristor PC 1's 4 foot is connected through series connection's resistance R1 and R3 and gets the electricity, opto-coupler thyristor PC 1's 3 foot is connected with power thyristor SCR2 control electrode electricity, power thyristor SCR 2's input is connected with U through resistance R3, the output is connected with power thyristor SCR 1's control electrode through diode D1, resistance R2 is connected between power thyristor SCR 2's output and control electrode, power thyristor SCR1 input is connected with U, the output is connected with load RL.
Preferably, the power thyristor SCR power supply circuit also comprises a resistor-capacitor circuit formed by connecting a resistor R5 and a capacitor C1 in parallel, one end of the resistor-capacitor circuit is connected between the cathode of the diode D1 and the control electrode of the power thyristor SCR1, and the other end of the resistor-capacitor circuit is connected between the output end of the power thyristor SCR1 and a load RL.
Preferably, the model of the optocoupler thyristor PC1 is MOC3023, the model of the power thyristor SCR2 is BT136, and the model of the power thyristor SCR1 is KP800A600V-KT39cT-Y40KPCn.
The utility model has the advantages that: the optocoupler thyristor is applied to a drive circuit of a high-power thyristor of an alternating-current submerged arc welding power supply, does not need an additional power supply, has a simple circuit structure, low cost, good parameter consistency, convenient adjustment, high reliability, easy equipment debugging, easy connection with a singlechip and the like, and is provided with a digital interface for networking control.
Drawings
FIG. 1 is a circuit diagram of an optocoupler drive circuit for an AC submerged arc welder in accordance with one embodiment.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, an optocoupler driving circuit of an ac submerged arc welding machine comprises an optocoupler thyristor PC1, resistors R1-R4, power thyristors SCR1 and SCR2, a load RL and a diode D1, wherein pin 1 of the optocoupler thyristor PC1 is connected with a power supply through the resistor R4, pin 2 of the optocoupler thyristor PC1 is used for receiving a phase-shifting signal sent by a singlechip, pin 4 of the optocoupler thyristor PC1 is connected with a U through resistors R1 and R3 which are connected in series to obtain power, pin 3 of the optocoupler thyristor PC1 is electrically connected with a control electrode of the power thyristors SCR2, an input end of the power thyristors SCR2 is connected with the U through the resistor R3, an output end of the power thyristors SCR2 is connected with a control electrode of the power thyristors SCR1, the resistor R2 is connected between an output end of the power thyristors SCR2 and the control electrode, and an input end of the power thyristors SCR1 is connected with the load RL. Specifically, in this embodiment, the U-phase driving circuit, the U-phase, the V-phase and the W-phase form a three-phase alternating current, so that the V-phase and the W-phase driving circuit are the same and will not be described in detail. The singlechip generates a CF1 phase-shift signal to drive the optocoupler thyristor PC1, and particularly in this embodiment, the model MOC3023 of the optocoupler thyristor PC may be replaced with other models according to needs in other embodiments. The optocoupler thyristor PC1 is powered from the U phase through R1 and R3 to trigger the power thyristor SCR2 (model BT 136), the power thyristor SCR2 is a medium power thyristor, a high-power thyristor is not needed to be used, the use cost is reduced, when the power thyristor SCR2 is powered and conducted from the U phase through R3, a signal is transmitted to a control electrode of the high-power thyristor SCR1 (model KP800A600V-KT39cT-Y40 KPCn) through a diode D1, the conduction of the high-power thyristor SCR1 is controlled through the optocoupler thyristor PC1, the output power of an alternating-current arc welding power supply is regulated, the whole circuit is simple in structure, good in reliability, the signal output end of a singlechip is electrically connected through the optocoupler thyristor PC1, the anti-interference capability is high, the realization of digital regulation and control is facilitated, the equipment debugging and the networking control are facilitated, and the digital process in the alternating-current welding field is promoted.
As shown in FIG. 1, the power thyristor SCR1 further comprises a resistor-capacitor circuit formed by connecting a resistor R5 and a capacitor C1 in parallel, one end of the resistor-capacitor circuit is connected between the cathode of the diode D1 and the control electrode of the power thyristor SCR1, and the other end of the resistor-capacitor circuit is connected between the output end of the power thyristor SCR1 and a load RL. Specifically, in this embodiment, the anti-interference performance of the high-power thyristor SCR1 can be improved, the gate pulse width is enlarged, and the ac switch is better triggered by using the rc buffer circuit formed by the capacitor C1 and the resistor R5.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (3)
1. An optical coupler driving circuit of an alternating current submerged arc welding machine is characterized in that: the power thyristor comprises an optocoupler thyristor PC1, resistors R1-R4, a power thyristor SCR1 and SCR2, a load RL and a diode D1, wherein a 1 pin of the optocoupler thyristor PC1 is connected with a power supply through the resistor R4, a 2 pin of the optocoupler thyristor PC1 is used for receiving a phase shifting signal sent by a singlechip, a 4 pin of the optocoupler thyristor PC1 is connected with U through resistors R1 and R3 which are connected in series to obtain power, a 3 pin of the optocoupler thyristor PC1 is electrically connected with a control electrode of the power thyristor SCR2, an input end of the power thyristor SCR2 is connected with U through the resistor R3, an output end of the power thyristor SCR2 is connected with a control electrode of the power thyristor SCR1 through the diode D1, an input end of the power thyristor PC1 is connected with the U, and an output end of the power thyristor is connected with the load RL.
2. The optocoupler drive circuit of an ac submerged arc welder of claim 1, wherein: the power thyristor SCR power supply circuit is characterized by further comprising a resistor R5 and a capacitor C1 which are connected in parallel, wherein one end of the resistor R5 is connected between the cathode of the diode D1 and the control electrode of the power thyristor SCR1, and the other end of the resistor R5 is connected between the output end of the power thyristor SCR1 and the load RL.
3. The optocoupler drive circuit of an ac submerged arc welder of claim 1, wherein: the model of the optocoupler thyristor PC1 is MOC3023, the model of the power thyristor SCR2 is BT136, and the model of the power thyristor SCR1 is KP800A600V-KT39cT-Y40KPCn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321211264.2U CN220050374U (en) | 2023-05-17 | 2023-05-17 | Optocoupler driving circuit of alternating current submerged arc welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321211264.2U CN220050374U (en) | 2023-05-17 | 2023-05-17 | Optocoupler driving circuit of alternating current submerged arc welding machine |
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| Publication Number | Publication Date |
|---|---|
| CN220050374U true CN220050374U (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321211264.2U Active CN220050374U (en) | 2023-05-17 | 2023-05-17 | Optocoupler driving circuit of alternating current submerged arc welding machine |
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| Country | Link |
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| CN (1) | CN220050374U (en) |
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2023
- 2023-05-17 CN CN202321211264.2U patent/CN220050374U/en active Active
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