CN205129141U - Take welding set of protection against electric shock - Google Patents
Take welding set of protection against electric shock Download PDFInfo
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- CN205129141U CN205129141U CN201520911344.8U CN201520911344U CN205129141U CN 205129141 U CN205129141 U CN 205129141U CN 201520911344 U CN201520911344 U CN 201520911344U CN 205129141 U CN205129141 U CN 205129141U
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Abstract
The utility model discloses a take welding set of protection against electric shock, put U1A, electric capacity C1 and opto -coupler U3 including resistance R2, diode D1, fortune, interface P1 is connected to resistance R2 one end, 2 ground connection of interface P1 pin, the voltage feedback signal is connected to interface P1 pin 1, resistance R1 other end connecting resistance R3, it is anodal that diode D1 is connected respectively to the resistance R3 other end, resistance R6, diode Z1 negative pole, electric capacity C4, resistance R5 and diode D1 are anodal, diode D1 negative pole connection + 15V voltage, diode Z1 anodal and the electric capacity C4 other end and ground connection are connected respectively to the resistance R6 other end, U1A homophase end is put to resistance R5 other end connection fortune. The utility model discloses protection against electric shock circuit between direct current output circuit and control module, this circuit detect output voltage, output current controls PWM output and narrows, reduce the elementary excitation current of transformer to reduce the noload voltage.
Description
Technical field
The utility model relates to welding machine technical field, specifically a kind of welder with protection against electric shock.
Background technology
SMAW is that manipulating electrode carries out welding job by hand, can carry out the multiposition welding such as downhand welding, vertical position welding, horizontal position welding and overhead welding.Because welding rod arc soldering equipment is light outside another electric arc, flexibly, thus, SMAW can have the place of power supply to carry out weld job any in carrying.Be applicable to the welding of various metal material, various thickness, various planform.
Electronic Control contravariant arc welder in the market, inverter type welder manufacturer is a lot, product quality varies, when hand welding machine is unloaded, floating voltage is higher, there is certain security risk, adds anti-electric shock apparatus, when making zero load, output voltage is at about 15V, in personal safety voltage tolerance range, improve the security performance of manual arc welder, thus meet European CE standard.
Utility model content
The purpose of this utility model is to provide a kind of welder with protection against electric shock, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of welder with protection against electric shock, comprise resistance R2, diode D1, amplifier U1A, electric capacity C1 and optocoupler U3, described resistance R2 one end connecting interface P1, interface P1 pin 2 ground connection, interface P1 pin 1 connects voltage feedback signal, resistance R1 other end contact resistance R3, the resistance R3 other end connects diode D1 positive pole respectively, resistance R6, diode Z1 negative pole, electric capacity C4, resistance R5 and diode D1 positive pole, diode D1 negative pole connects+15V voltage, the resistance R6 other end connects diode Z1 positive pole and the electric capacity C4 other end and ground connection respectively, the resistance R5 other end connects amplifier U1A in-phase end, amplifier U1A end of oppisite phase connects amplifier U1A output respectively, resistance R1 and resistance R12, amplifier U1A earth terminal connects ground capacity C8 and-15V power supply respectively, amplifier U1A power end connects ground capacity C1 and+15V power supply respectively, the resistance R1 other end connects amplifier U2A end of oppisite phase and ground capacity C3 respectively, amplifier U2A in-phase end connects earth resistance R8 and resistance R7 respectively, the resistance R7 other end connects+15V power supply, amplifier U2A power end connects+15V power supply and ground capacity C5 respectively, amplifier U2A earth terminal connects-15V power supply and ground capacity C2 respectively, amplifier U2A output connects diode D2 negative pole and resistance R9 respectively, diode D2 positive pole connects diode D3 positive pole respectively, the resistance R9 other end, ground capacity C7 and amplifier U1B end of oppisite phase, diode D3 negative pole connects current feedback signal by resistance R4, amplifier U1B in-phase end connects earth resistance R11 and resistance R10 respectively, the resistance R10 other end connects+15V power supply, amplifier U1B output connects ground capacity C6 and resistance R13 respectively, the resistance R13 other end connects diode D5 negative pole, diode D5 positive pole connects light emitting diode negative pole in diode D6 positive pole and optocoupler U3 respectively, diode D6 negative pole contact resistance R16, the resistance R16 other end connects electric capacity C10 and amplifier U1C output respectively, the electric capacity C10 other end connects electric capacity C9, the electric capacity C9 other end is the contact resistance R12 other end and amplifier U1C end of oppisite phase respectively, amplifier U1C in-phase end connects earth resistance R15 respectively, resistance R14 and triode Q1 emitter stage, triode Q1 colelctor electrode connects+15V power supply and the resistance R14 other end respectively, triode Q1 colelctor electrode connects diode D4 negative pole, diode D4 positive pole connects current feedback signal, light emitting diode plus earth in optocoupler U3, phototriode grounded emitter in optocoupler U3, in optocoupler U3, phototriode colelctor electrode connects envelope ripple signal.
As the utility model further scheme: described diode Z1 is Zener diode.
Compared with prior art, the beneficial effects of the utility model are: the utility model is protection against electric shock circuit between DC output circuit and control module, this electric circuit inspection output voltage, output current control PWM export and narrow, and reduce primary exciting current, thus reduce floating voltage.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the welder of band protection against electric shock.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of welder with protection against electric shock, comprise resistance R2, diode D1, amplifier U1A, electric capacity C1 and optocoupler U3, described resistance R2 one end connecting interface P1, interface P1 pin 2 ground connection, interface P1 pin 1 connects voltage feedback signal, resistance R1 other end contact resistance R3, the resistance R3 other end connects diode D1 positive pole respectively, resistance R6, diode Z1 negative pole, electric capacity C4, resistance R5 and diode D1 positive pole, diode D1 negative pole connects+15V voltage, the resistance R6 other end connects diode Z1 positive pole and the electric capacity C4 other end and ground connection respectively, the resistance R5 other end connects amplifier U1A in-phase end, amplifier U1A end of oppisite phase connects amplifier U1A output respectively, resistance R1 and resistance R12, amplifier U1A earth terminal connects ground capacity C8 and-15V power supply respectively, amplifier U1A power end connects ground capacity C1 and+15V power supply respectively, the resistance R1 other end connects amplifier U2A end of oppisite phase and ground capacity C3 respectively, amplifier U2A in-phase end connects earth resistance R8 and resistance R7 respectively, the resistance R7 other end connects+15V power supply, amplifier U2A power end connects+15V power supply and ground capacity C5 respectively, amplifier U2A earth terminal connects-15V power supply and ground capacity C2 respectively, amplifier U2A output connects diode D2 negative pole and resistance R9 respectively, diode D2 positive pole connects diode D3 positive pole respectively, the resistance R9 other end, ground capacity C7 and amplifier U1B end of oppisite phase, diode D3 negative pole connects current feedback signal by resistance R4, amplifier U1B in-phase end connects earth resistance R11 and resistance R10 respectively, the resistance R10 other end connects+15V power supply, amplifier U1B output connects ground capacity C6 and resistance R13 respectively, the resistance R13 other end connects diode D5 negative pole, diode D5 positive pole connects light emitting diode negative pole in diode D6 positive pole and optocoupler U3 respectively, diode D6 negative pole contact resistance R16, the resistance R16 other end connects electric capacity C10 and amplifier U1C output respectively, the electric capacity C10 other end connects electric capacity C9, the electric capacity C9 other end is the contact resistance R12 other end and amplifier U1C end of oppisite phase respectively, amplifier U1C in-phase end connects earth resistance R15 respectively, resistance R14 and triode Q1 emitter stage, triode Q1 colelctor electrode connects+15V power supply and the resistance R14 other end respectively, triode Q1 colelctor electrode connects diode D4 negative pole, diode D4 positive pole connects current feedback signal, light emitting diode plus earth in optocoupler U3, phototriode grounded emitter in optocoupler U3, in optocoupler U3, phototriode colelctor electrode connects envelope ripple signal.
Described diode Z1 is Zener diode.
Operation principle of the present utility model is: refer to Fig. 1, anti-electric shock apparatus designs for personal safety, because this welding machine is mainly used in family, security is very important, design this function to reduce idle voltage output for this reason, mainly consisting of of the utility model circuit samples a voltage signal by divider resistance R2 by output two ends, R3, R6 dividing potential drop, this voltage delivers to amplifier U1C reverse input end after amplifier U1A voltage follow, again with the positive input reference voltage of amplifier U1C, compare (namely when actual floating voltage is higher than 15V), by resistance R12, electric capacity C9, C10 differential circuit, through amplifier U1C output low level after a while, by resistance R16, diode D6 is optocoupler U3 conducting, drag down main control module envelope wave voltage signal slowly, driving PWM pulsewidth is narrowed, reduce primary exciting current, thus reach the object reducing floating voltage.During normal work, electric current device detects main transformer primary current signal, make the conducting of diode D4 high level, thus the E pole tension of triode Q1 is raised, namely amplifier U1C in-phase end voltage is higher than end of oppisite phase voltage, amplifier U1C output exports high level, and optocoupler U3 ends, and PWM output pulse width normally works by the current value of setting.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (2)
1. the welder with protection against electric shock, comprise resistance R2, diode D1, amplifier U1A, electric capacity C1 and optocoupler U3, it is characterized in that, described resistance R2 one end connecting interface P1, interface P1 pin 2 ground connection, interface P1 pin 1 connects voltage feedback signal, resistance R1 other end contact resistance R3, the resistance R3 other end connects diode D1 positive pole respectively, resistance R6, diode Z1 negative pole, electric capacity C4, resistance R5 and diode D1 positive pole, diode D1 negative pole connects+15V voltage, the resistance R6 other end connects diode Z1 positive pole and the electric capacity C4 other end and ground connection respectively, the resistance R5 other end connects amplifier U1A in-phase end, amplifier U1A end of oppisite phase connects amplifier U1A output respectively, resistance R1 and resistance R12, amplifier U1A earth terminal connects ground capacity C8 and-15V power supply respectively, amplifier U1A power end connects ground capacity C1 and+15V power supply respectively, the resistance R1 other end connects amplifier U2A end of oppisite phase and ground capacity C3 respectively, amplifier U2A in-phase end connects earth resistance R8 and resistance R7 respectively, the resistance R7 other end connects+15V power supply, amplifier U2A power end connects+15V power supply and ground capacity C5 respectively, amplifier U2A earth terminal connects-15V power supply and ground capacity C2 respectively, amplifier U2A output connects diode D2 negative pole and resistance R9 respectively, diode D2 positive pole connects diode D3 positive pole respectively, the resistance R9 other end, ground capacity C7 and amplifier U1B end of oppisite phase, diode D3 negative pole connects current feedback signal by resistance R4, amplifier U1B in-phase end connects earth resistance R11 and resistance R10 respectively, the resistance R10 other end connects+15V power supply, amplifier U1B output connects ground capacity C6 and resistance R13 respectively, the resistance R13 other end connects diode D5 negative pole, diode D5 positive pole connects light emitting diode negative pole in diode D6 positive pole and optocoupler U3 respectively, diode D6 negative pole contact resistance R16, the resistance R16 other end connects electric capacity C10 and amplifier U1C output respectively, the electric capacity C10 other end connects electric capacity C9, the electric capacity C9 other end is the contact resistance R12 other end and amplifier U1C end of oppisite phase respectively, amplifier U1C in-phase end connects earth resistance R15 respectively, resistance R14 and triode Q1 emitter stage, triode Q1 colelctor electrode connects+15V power supply and the resistance R14 other end respectively, triode Q1 colelctor electrode connects diode D4 negative pole, diode D4 positive pole connects current feedback signal, light emitting diode plus earth in optocoupler U3, phototriode grounded emitter in optocoupler U3, in optocoupler U3, phototriode colelctor electrode connects envelope ripple signal.
2. the welder of band protection against electric shock according to claim 1, is characterized in that, described diode Z1 is Zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520911344.8U CN205129141U (en) | 2015-11-16 | 2015-11-16 | Take welding set of protection against electric shock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520911344.8U CN205129141U (en) | 2015-11-16 | 2015-11-16 | Take welding set of protection against electric shock |
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| CN205129141U true CN205129141U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520911344.8U Active CN205129141U (en) | 2015-11-16 | 2015-11-16 | Take welding set of protection against electric shock |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666292A (en) * | 2019-09-05 | 2020-01-10 | 上海沪工焊接集团股份有限公司 | Inverter welding machine narrow pulse width peak current control method and circuit |
| CN113977038A (en) * | 2021-11-16 | 2022-01-28 | 昆山华恒焊接股份有限公司 | Welding control circuit, welding gun and welding equipment |
-
2015
- 2015-11-16 CN CN201520911344.8U patent/CN205129141U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666292A (en) * | 2019-09-05 | 2020-01-10 | 上海沪工焊接集团股份有限公司 | Inverter welding machine narrow pulse width peak current control method and circuit |
| CN113977038A (en) * | 2021-11-16 | 2022-01-28 | 昆山华恒焊接股份有限公司 | Welding control circuit, welding gun and welding equipment |
| CN113977038B (en) * | 2021-11-16 | 2023-09-26 | 昆山华恒焊接股份有限公司 | Welding control circuit, welding gun and welding equipment |
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