CN203973028U - Argon arc welding hand switch signal isolation circuit - Google Patents
Argon arc welding hand switch signal isolation circuit Download PDFInfo
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- CN203973028U CN203973028U CN201420465549.3U CN201420465549U CN203973028U CN 203973028 U CN203973028 U CN 203973028U CN 201420465549 U CN201420465549 U CN 201420465549U CN 203973028 U CN203973028 U CN 203973028U
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Abstract
The utility model provides a kind of argon arc welding hand switch signal isolation circuit, hand switch control is exported hand switch signal after by transformer isolation circuit and optical coupling isolation circuit dual resisteance, reduce the interference of welding machine and external environment condition opponent switching signal, by the mu balanced circuit in transformer isolation circuit, in the time that supply voltage is unstable, also can guarantee that the change frequency of isolation voltage signal is not subject to the interference of supply voltage, keep matching with the switching frequency of hand switch, thereby the switching frequency of further having guaranteed hand switch signal and hand switch matches, prevent false triggering, hand switch signal output effect is good, welding effect ideal.
Description
Technical field
The utility model relates to a kind of buffer circuit.Relate in particular to a kind of argon arc welding hand switch signal isolation circuit.
Background technology
Argon arc welding, is to use a kind of solder technology of argon gas as protective gas, claims again argon gas protection weldering.Be exactly argon shield gas on logical around arc welding, by air insulated outside welding zone, thereby prevent a kind of solder technology of the oxidation of welding zone.
Argon arc welding is extensively promoted the use of at the welding field such as stainless steel, aluminium alloy at present, particularly plate sheet welding, and 90% is all monopolized by pulsed argon arc welding.Argon arc welding needs to puncture argon gas by high frequency voltage in welding process, thereby forms electric arc between welding work pieces, and arc burning produces high temperature wlding is melted into liquid state, makes to reach between welding work pieces metallurgical binding.Owing to constantly serving argon gas in high-temperature fusion welding, wlding can not be contacted with airborne oxygen, thereby prevented the oxidation of wlding.Argon arc welding requires argon gas to walk afterwards first, and electric current got ahead (argon gas relatively) afterwards, and these are all realized by hand switch control.The high frequency of the starting the arc simultaneously is also subject to hand switch control.In actual use, hand switch signal is in the time being transported in welding machine control circuit, and the high frequency voltage that often can be subject to welding machine itself and extraneous various interference, particularly welding machine itself disturbs, thereby affects the normal welding job of welding machine.Traditional hand switch signal isolation circuit just by hand switch signal control line simply on a magnet ring, or simply isolate by independent optical coupling isolation circuit, cause signal output effect poor, false triggering probability is high, has many weak points.
Utility model content
For this reason, technical problem to be solved in the utility model is hand switch signal isolation circuit poor anti jamming capability of the prior art, make hand switch signal output effect poor, false triggering rate is high, welding effect is undesirable, thereby provide a kind of antijamming capability strong, can prevent the argon arc welding hand switch signal isolation circuit of false triggering.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows:
The utility model provides a kind of argon arc welding hand switch signal isolation circuit, comprising:
Transformer isolation circuit, produces corresponding induced voltage by the switching of hand switch, and exports corresponding isolation voltage signal according to described induced voltage;
Optical coupling isolation circuit, receives described isolation voltage signal from described transformer isolation circuit, and the hand switch signal matching according to described isolation voltage signal output and the switching frequency of described hand switch;
Described transformer isolation circuit also comprises mu balanced circuit, for in the time that supply voltage is unstable, guarantee that the change frequency of described isolation voltage signal and the switching frequency of described hand switch match, and then guarantee the hand switch signal that described optical coupling isolation circuit output and the switching frequency of described hand switch match.
Argon arc welding hand switch signal isolation circuit described in the utility model, described transformer isolation circuit comprises the bridge circuit of isolating transformer T1, voltage-stabiliser tube Z1, Z2, resistance R 1 and diode D1, D2, D3, D4 composition;
Pin 1 and the pin 2 of the former limit winding N1 of described isolating transformer T1, couple with two stiff ends of hand switch respectively;
The positive pole of the positive pole of described voltage-stabiliser tube Z1 and described voltage-stabiliser tube Z2 couples with the two ends of the secondary winding of described isolating transformer T1 respectively, the negative pole of the negative pole of described voltage-stabiliser tube Z1 and described voltage-stabiliser tube Z2 couples, and forms the mu balanced circuit in described transformer isolation circuit;
The positive pole of described diode D1 is connected the first end as bridge circuit with the negative pole of described diode D3, the positive pole of described diode D2 is connected the second end as bridge circuit with the negative pole of described diode D4, the negative pole of described diode D1 is connected the 3rd end as bridge circuit with the negative pole of described diode D2, the positive pole of described diode D3 is connected the 4th end as bridge circuit with the positive pole of described diode D4;
The first end of described resistance R 1 and the first end of described bridge circuit couple, its second end couples with the second end of described bridge circuit and the positive pole of described voltage-stabiliser tube Z2 respectively, the first end of the positive pole of described voltage-stabiliser tube Z1 and described resistance R 1 is the supply voltage input port of described transformer isolation circuit, couples with supply voltage;
The 3rd end and the 4th end of described bridge circuit are the isolation voltage signal output port of described transformer isolation circuit, couple with the voltage signal input port of described optical coupling isolation circuit.
Argon arc welding hand switch signal isolation circuit described in the utility model, described optical coupling isolation circuit comprises resistance R 2, R3, polar capacitor C1, voltage-stabiliser tube Z3, photoelectrical coupler U1, triode Q1 and diode D5;
One end while of described resistance R 2 and the 3rd end of described bridge circuit, the negative pole anodal and described voltage-stabiliser tube Z3 of described polar capacitor C1 couples, the other end while of described resistance R 2 and the 4th end of described bridge circuit, the negative pole of the photophore in the negative pole of described polar capacitor C1 and described photoelectrical coupler U1 couples rear ground connection, the two ends of described resistance R 2 are the voltage signal input port of described optical coupling isolation circuit, the positive pole of one end of described resistance R 3 and described voltage-stabiliser tube Z3 couples, the positive pole of the photophore in the other end of described resistance R 3 and described photoelectrical coupler U1 couples, the colelctor electrode of described triode Q1 simultaneously with negative pole and the described photoelectrical coupler U1 of described diode D5 in the colelctor electrode of light-receiving device couple, the emitter stage of the light-receiving device in the base stage of described triode Q1 and described photoelectrical coupler U1 couples, the positive pole of described diode D5 connects high level, the emitter stage of described triode Q1 is the hand switch signal output port of described optical coupling isolation circuit.
Argon arc welding hand switch signal isolation circuit described in the utility model, described optical coupling isolation circuit comprises resistance R 2, R3, polar capacitor C1, voltage-stabiliser tube Z3, photoelectrical coupler U1 and diode D5;
One end while of described resistance R 2 and the 3rd end of described bridge circuit, the negative pole anodal and described voltage-stabiliser tube Z3 of described polar capacitor C1 couples, the other end while of described resistance R 2 and the 4th end of described bridge circuit, the negative pole of the photophore in the negative pole of described polar capacitor C1 and described photoelectrical coupler U1 couples rear ground connection, the two ends of described resistance R 2 are the voltage signal input port of described optical coupling isolation circuit, the positive pole of one end of described resistance R 3 and described voltage-stabiliser tube Z3 couples, the positive pole of the photophore in the other end of described resistance R 3 and described photoelectrical coupler U1 couples, the colelctor electrode of the light-receiving device in the negative pole of described diode D5 and described photoelectrical coupler U1 couples, the positive pole of described diode D5 connects high level, the emitter stage of the light-receiving device in described photoelectrical coupler U1 is the hand switch signal output port of described optical coupling isolation circuit.
Technique scheme of the present utility model has the following advantages compared to existing technology:
The utility model provides a kind of argon arc welding hand switch signal isolation circuit, comprise by the switching of hand switch and produce corresponding induced voltage, and export the transformer isolation circuit of corresponding isolation voltage signal according to described induced voltage, receive described isolation voltage signal from described transformer isolation circuit, and the optical coupling isolation circuit of the hand switch signal matching according to described isolation voltage signal output and the switching frequency of described hand switch, separately, described transformer isolation circuit also comprises mu balanced circuit, can be in the time that supply voltage be unstable, guarantee that the change frequency of described isolation voltage signal and the switching frequency of described hand switch match, and then guarantee the hand switch signal that the output of described optical coupling isolation circuit and the switching frequency of described hand switch match.Therefore, argon arc welding hand switch signal isolation circuit described in the utility model, hand switch control is by transformer isolation circuit and optical coupling isolation circuit output hand switch signal, reduce the interference of welding machine and external environment condition opponent switching signal, by the mu balanced circuit in transformer isolation circuit, in the time that supply voltage is unstable, also can guarantee that the change frequency of isolation voltage signal is not subject to the interference of supply voltage, keep matching with the switching frequency of hand switch, thereby the switching frequency of further having guaranteed hand switch signal and hand switch matches, prevent false triggering, hand switch signal output effect is good, welding effect ideal.
Brief description of the drawings
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the structured flowchart of argon arc welding hand switch signal isolation circuit described in the utility model;
Fig. 2 is a kind of concrete circuit theory diagrams of argon arc welding hand switch signal isolation circuit described in the utility model;
Fig. 3 is the concrete circuit theory diagrams of another kind of argon arc welding hand switch signal isolation circuit described in the utility model.
Detailed description of the invention
Embodiment 1
The present embodiment provides a kind of argon arc welding hand switch signal isolation circuit, as shown in Figure 1,
Comprise:
Transformer isolation circuit, produces corresponding induced voltage by the switching of hand switch, and exports corresponding isolation voltage signal according to described induced voltage.
Optical coupling isolation circuit, receives described isolation voltage signal from described transformer isolation circuit, and the hand switch signal matching according to described isolation voltage signal output and the switching frequency of described hand switch.
Described transformer isolation circuit also comprises mu balanced circuit, for in the time that supply voltage is unstable, guarantee that the change frequency of described isolation voltage signal and the switching frequency of described hand switch match, and then guarantee the hand switch signal that described optical coupling isolation circuit output and the switching frequency of described hand switch match.
In concrete application, the switching of hand switch produces high frequency voltage and punctures argon gas, thereby between welding work pieces, form electric arc, therefore the output effect of the quality of electric arc and hand switch signal (hand switch opens and closes the high-frequency signal producing) is closely bound up, if hand switch signal is interfered, unstable output, can directly affect the quality of welding.Argon arc welding hand switch signal isolation circuit described in the present embodiment, its transformer isolation circuit can produce corresponding induced voltage according to the switching of hand switch, and export corresponding isolation voltage signal according to described induced voltage, therefore described isolation voltage signal is also to match with the switching of hand switch, and the hand switch signal that optical coupling isolation circuit can match according to described isolation voltage signal output and the switching frequency of described hand switch, this is just equivalent to hand switch signal and just can exports by the dual resisteance of transformer isolation and light-coupled isolation, guarantee the stability of hand switch signal, mu balanced circuit in another described transformer isolation circuit, in the time of the huge fluctuation of the unstable appearance of supply voltage, can also guarantee that the change frequency of isolation voltage signal and the frequency that described hand switch opens and closes match, and optical coupling isolation circuit is according to isolation voltage signal output hand switch signal, therefore in the situation that isolation voltage signal keeps stable, also guaranteed the stability of the hand switch signal of optical coupling isolation circuit output.
Argon arc welding hand switch signal isolation circuit described in the present embodiment, hand switch control is by transformer isolation circuit and optical coupling isolation circuit output hand switch signal, reduce the interference of welding machine and external environment condition opponent switching signal, by the mu balanced circuit in transformer isolation circuit, in the time that supply voltage is unstable, also can guarantee that the change frequency of isolation voltage signal is not subject to the interference of supply voltage, keep matching with the switching frequency of hand switch, thereby the switching frequency of further having guaranteed hand switch signal and hand switch matches, prevent false triggering, hand switch signal output effect is good, welding effect ideal.
Embodiment 2
On the basis of embodiment 1, argon arc welding hand switch signal isolation circuit described in the present embodiment, as shown in Figure 2, described transformer isolation circuit comprises the bridge circuit of isolating transformer T1, voltage-stabiliser tube Z1, Z2, resistance R 1 and diode D1, D2, D3, D4 composition.
Pin 1 and the pin 2 of the former limit winding N1 of described isolating transformer T1, couple with two stiff ends of hand switch respectively.
The positive pole of the positive pole of described voltage-stabiliser tube Z1 and described voltage-stabiliser tube Z2 couples with the two ends of the secondary winding of described isolating transformer T1 respectively, the negative pole of the negative pole of described voltage-stabiliser tube Z1 and described voltage-stabiliser tube Z2 couples, and forms the mu balanced circuit in described transformer isolation circuit.
The positive pole of described diode D1 is connected the first end as bridge circuit with the negative pole of described diode D3, the positive pole of described diode D2 is connected the second end as bridge circuit with the negative pole of described diode D4, the negative pole of described diode D1 is connected the 3rd end as bridge circuit with the negative pole of described diode D2, the positive pole of described diode D3 is connected the 4th end as bridge circuit with the positive pole of described diode D4.
The first end of described resistance R 1 and the first end of described bridge circuit couple, its second end couples with the second end of described bridge circuit and the positive pole of described voltage-stabiliser tube Z2 respectively, the first end of the positive pole of described voltage-stabiliser tube Z1 and described resistance R 1 is the supply voltage input port of described transformer isolation circuit, couples with supply voltage.
The 3rd end and the 4th end of described bridge circuit are the isolation voltage signal output port of described transformer isolation circuit, couple with the voltage signal input port of described optical coupling isolation circuit.
As the optional embodiment of one, argon arc welding hand switch signal isolation circuit described in the present embodiment, as shown in Figure 2, described optical coupling isolation circuit comprises resistance R 2, R3, polar capacitor C1, voltage-stabiliser tube Z3, photoelectrical coupler U1, triode Q1 and diode D5.
One end while of described resistance R 2 and the 3rd end of described bridge circuit, the negative pole anodal and described voltage-stabiliser tube Z3 of described polar capacitor C1 couples, the other end while of described resistance R 2 and the 4th end of described bridge circuit, the negative pole of the photophore in the negative pole of described polar capacitor C1 and described photoelectrical coupler U1 couples rear ground connection, the two ends of described resistance R 2 are the voltage signal input port of described optical coupling isolation circuit, the positive pole of one end of described resistance R 3 and described voltage-stabiliser tube Z3 couples, the positive pole of the photophore in the other end of described resistance R 3 and described photoelectrical coupler U1 couples, the colelctor electrode of described triode Q1 simultaneously with negative pole and the described photoelectrical coupler U1 of described diode D5 in the colelctor electrode of light-receiving device couple, the emitter stage of the light-receiving device in the base stage of described triode Q1 and described photoelectrical coupler U1 couples, the positive pole of described diode D5 connects high level, the emitter stage of described triode Q1 is the hand switch signal output port of described optical coupling isolation circuit.
In concrete application, short circuit or the disconnection of described isolating transformer T1 former limit winding N1 are to be controlled by the switching of hand switch, in the time that hand switch is opened, the former limit short circuit in winding of described isolating transformer T1, in the time that hand switch is closed, the former limit winding of described isolating transformer T1 disconnects, also be the pin 1 of hand switch control isolating transformer T1 former limit winding N1, 2 short circuit and disconnection, thereby the induced voltage on isolating transformer T1 secondary winding N2 is changed, wherein pin 3, 4 is the voltage input end mouth of described transformer isolation circuit, couple with supply voltage, the voltage at resistance R 1 two ends also can be along with the induced voltage of isolating transformer T1 secondary winding N2 changes and changes like this.Voltage-stabiliser tube Z1, Z2 are in the time that supply voltage is unstable, can absorb peak voltage, electric current, prevent unstable due to supply voltage, cause resistance R 1 both end voltage unstable, in the time that described isolation voltage signal should be low level, cause the photoelectrical coupler false triggering in optical coupling isolation circuit, make the output of hand switch signal, cause the switching frequency of hand switch signal and hand switch not meet, output effect is poor, and welding effect is undesirable.The voltage at resistance R 1 two ends is through diode D1, D2, D3, the 3rd end and the 4th end (being also the isolation voltage signal output port of described transformer isolation circuit) from described bridge circuit after D4 full-bridge rectification transfer to resistance R 2 two ends (being also the voltage input end mouth of described optical coupling isolation circuit), and by polar capacitor C1 filtering, after the voltage stabilizing of voltage-stabiliser tube Z3 and the current limliting of resistance R 3, be added in afterwards the positive pole of the photophore in described photoelectrical coupler U1, in the time that the anodal voltage of the photophore in described photoelectrical coupler U1 reaches photoelectrical coupler work rated voltage, photoelectrical coupler U1 normally works, the light-receiving device conducting of photoelectrical coupler U1, the high level signal of pin 6 (positive pole of diode D5) is through diode D5, the emitter stage of the photophore of photoelectrical coupler U1 is input to the base stage of triode Q1, triode Q1 is in conducting state, therefore the high level signal of pin 6 is by diode D5, directly export as hand switch signal after pin 5 through the collector and emitter of triode Q1, the switching frequency of its change frequency and hand switch matches, the transformer isolation of hand switch signal and the dual resisteance control of light-coupled isolation are realized, hand switch signal antijamming capability is strong, output effect is good, guarantee the quality of welding.
As shown in Figure 2, when the former limit of isolating transformer T1 winding is in the time disconnecting, because the former secondary turn ratio of described isolating transformer T1 is 1:1, therefore, the equivalent resistance of described isolating transformer T1 secondary winding is also just very large, therefore the induced voltage above described isolating transformer T1 secondary winding is very high, substantially be equal to the supply voltage obtaining from described pin 3 and pin 4, make the both end voltage of divider resistance R1 corresponding just very little, now, mu balanced circuit in described transformer isolation circuit just can prevent from causing because supply voltage is unstable false triggering, make bleeder circuit R1 in the time that peak voltage appears in supply voltage shakiness, also can keep very little value, can not trigger photoelectrical coupler U1.Zener diode Z1, Z2 in mu balanced circuit, its parameters selection is consistent with supply voltage.Because divider resistance R1 brownout can not allow photoelectrical coupler U1 work, the photophore in photoelectrical coupler U1 can conducting yet, therefore triode Q1 can conducting yet, thereby make pin 5, the hand switch signal output port that is described optical coupling isolation circuit can not exported high level yet, and the switching frequency of the change frequency of hand switch signal and hand switch matches yet.
When the former limit of isolating transformer T1 winding is during in closure, isolating transformer T1 secondary winding equivalent resistance can trend towards infinitesimal, now divider resistance R1 both end voltage is almost equal to supply voltage, divider resistance R1 both end voltage is through commutation diode D1, D2, D3, after D4 full-bridge rectification, export described isolation voltage signal, described isolation voltage signal is transferred to photoelectrical coupler U1 after by the voltage stabilizing of voltage-stabiliser tube Z3 and the current limliting of resistance R 3, photoelectrical coupler U1 is normally worked, now the light-receiving device in photoelectrical coupler U1 is subject to conducting after the irradiation of photophore of photoelectrical coupler U1, the high level of pin 6 will make triode Q1 conducting by the light-receiving device in photoelectrical coupler U1, and by emitter stage (pin 5) output of triode Q1, the switching frequency of the change frequency of hand switch signal and hand switch matches, signal output effect is good.
As the optional embodiment of another kind, the argon arc welding hand switch signal isolation circuit described in the present embodiment, as shown in Figure 3, described optical coupling isolation circuit comprises resistance R 2, R3, polar capacitor C1, voltage-stabiliser tube Z3, photoelectrical coupler U1 and diode D5.
One end while of described resistance R 2 and the 3rd end of described bridge circuit, the negative pole anodal and described voltage-stabiliser tube Z3 of described polar capacitor C1 couples, the other end while of described resistance R 2 and the 4th end of described bridge circuit, the negative pole of the photophore in the negative pole of described polar capacitor C1 and described photoelectrical coupler U1 couples rear ground connection, the two ends of described resistance R 2 are the voltage signal input port of described optical coupling isolation circuit, the positive pole of one end of described resistance R 3 and described voltage-stabiliser tube Z3 couples, the positive pole of the photophore in the other end of described resistance R 3 and described photoelectrical coupler U1 couples, the colelctor electrode of the light-receiving device in the negative pole of described diode D5 and described photoelectrical coupler U1 couples, the positive pole of described diode D5 connects high level, the emitter stage of the light-receiving device in described photoelectrical coupler U1 is the hand switch signal output port of described optical coupling isolation circuit.
In concrete application, optical coupling isolation circuit in this kind of situation is applicable to general civilian argon arc welding hand switch signal isolation circuit, be to have saved triode Q1 with the difference of Fig. 2, in the time that photoelectrical coupler U1 works, the high level of the pin 6 directly emitter stage of the light-receiving device from photoelectrical coupler U1 is exported to pin 5, the dual resisteance of having realized hand switch signal, has reduced use cost.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And among the protection domain that the apparent variation of being extended out thus or variation are still created in the utility model.
Claims (4)
1. an argon arc welding hand switch signal isolation circuit, is characterized in that, comprising:
Transformer isolation circuit, produces corresponding induced voltage by the switching of hand switch, and exports corresponding isolation voltage signal according to described induced voltage;
Optical coupling isolation circuit, receives described isolation voltage signal from described transformer isolation circuit, and the hand switch signal matching according to described isolation voltage signal output and the switching frequency of described hand switch;
Described transformer isolation circuit also comprises mu balanced circuit, for in the time that supply voltage is unstable, guarantee that the change frequency of described isolation voltage signal and the switching frequency of described hand switch match, and then guarantee the hand switch signal that described optical coupling isolation circuit output and the switching frequency of described hand switch match.
2. argon arc welding hand switch signal isolation circuit according to claim 1, is characterized in that, described transformer isolation circuit comprises the bridge circuit of isolating transformer T1, voltage-stabiliser tube Z1, Z2, resistance R 1 and diode D1, D2, D3, D4 composition;
Pin 1 and the pin 2 of the former limit winding N1 of described isolating transformer T1, couple with two stiff ends of hand switch respectively;
The positive pole of the positive pole of described voltage-stabiliser tube Z1 and described voltage-stabiliser tube Z2 couples with the two ends of the secondary winding of described isolating transformer T1 respectively, the negative pole of the negative pole of described voltage-stabiliser tube Z1 and described voltage-stabiliser tube Z2 couples, and forms the mu balanced circuit in described transformer isolation circuit;
The positive pole of described diode D1 is connected the first end as bridge circuit with the negative pole of described diode D3, the positive pole of described diode D2 is connected the second end as bridge circuit with the negative pole of described diode D4, the negative pole of described diode D1 is connected the 3rd end as bridge circuit with the negative pole of described diode D2, the positive pole of described diode D3 is connected the 4th end as bridge circuit with the positive pole of described diode D4;
The first end of described resistance R 1 and the first end of described bridge circuit couple, its second end couples with the second end of described bridge circuit and the positive pole of described voltage-stabiliser tube Z2 respectively, the first end of the positive pole of described voltage-stabiliser tube Z1 and described resistance R 1 is the supply voltage input port of described transformer isolation circuit, couples with supply voltage;
The 3rd end and the 4th end of described bridge circuit are the isolation voltage signal output port of described transformer isolation circuit, couple with the voltage signal input port of described optical coupling isolation circuit.
3. argon arc welding hand switch signal isolation circuit according to claim 2, is characterized in that, described optical coupling isolation circuit comprises resistance R 2, R3, polar capacitor C1, voltage-stabiliser tube Z3, photoelectrical coupler U1, triode Q1 and diode D5;
One end while of described resistance R 2 and the 3rd end of described bridge circuit, the negative pole anodal and described voltage-stabiliser tube Z3 of described polar capacitor C1 couples, the other end while of described resistance R 2 and the 4th end of described bridge circuit, the negative pole of the photophore in the negative pole of described polar capacitor C1 and described photoelectrical coupler U1 couples rear ground connection, the two ends of described resistance R 2 are the voltage signal input port of described optical coupling isolation circuit, the positive pole of one end of described resistance R 3 and described voltage-stabiliser tube Z3 couples, the positive pole of the photophore in the other end of described resistance R 3 and described photoelectrical coupler U1 couples, the colelctor electrode of described triode Q1 simultaneously with negative pole and the described photoelectrical coupler U1 of described diode D5 in the colelctor electrode of light-receiving device couple, the emitter stage of the light-receiving device in the base stage of described triode Q1 and described photoelectrical coupler U1 couples, the positive pole of described diode D5 connects high level, the emitter stage of described triode Q1 is the hand switch signal output port of described optical coupling isolation circuit.
4. argon arc welding hand switch signal isolation circuit according to claim 2, is characterized in that, described optical coupling isolation circuit comprises resistance R 2, R3, polar capacitor C1, voltage-stabiliser tube Z3, photoelectrical coupler U1 and diode D5;
One end while of described resistance R 2 and the 3rd end of described bridge circuit, the negative pole anodal and described voltage-stabiliser tube Z3 of described polar capacitor C1 couples, the other end while of described resistance R 2 and the 4th end of described bridge circuit, the negative pole of the photophore in the negative pole of described polar capacitor C1 and described photoelectrical coupler U1 couples rear ground connection, the two ends of described resistance R 2 are the voltage signal input port of described optical coupling isolation circuit, the positive pole of one end of described resistance R 3 and described voltage-stabiliser tube Z3 couples, the positive pole of the photophore in the other end of described resistance R 3 and described photoelectrical coupler U1 couples, the colelctor electrode of the light-receiving device in the negative pole of described diode D5 and described photoelectrical coupler U1 couples, the positive pole of described diode D5 connects high level, the emitter stage of the light-receiving device in described photoelectrical coupler U1 is the hand switch signal output port of described optical coupling isolation circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420465549.3U CN203973028U (en) | 2014-08-18 | 2014-08-18 | Argon arc welding hand switch signal isolation circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420465549.3U CN203973028U (en) | 2014-08-18 | 2014-08-18 | Argon arc welding hand switch signal isolation circuit |
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| CN203973028U true CN203973028U (en) | 2014-12-03 |
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| CN201420465549.3U Expired - Fee Related CN203973028U (en) | 2014-08-18 | 2014-08-18 | Argon arc welding hand switch signal isolation circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996586A (en) * | 2017-05-18 | 2017-08-01 | 浙江帅康电气股份有限公司 | Fresh air linkage controller and the range hood using the linkage controller |
| CN109079286A (en) * | 2018-08-27 | 2018-12-25 | 上海锅炉厂有限公司 | TIG weld isolated from power interface circuit |
| CN111257612A (en) * | 2020-01-17 | 2020-06-09 | 南京瑞控电气有限公司 | Isolation circuit for realizing linear pulse electric quantity based on electromagnetic sensor |
-
2014
- 2014-08-18 CN CN201420465549.3U patent/CN203973028U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996586A (en) * | 2017-05-18 | 2017-08-01 | 浙江帅康电气股份有限公司 | Fresh air linkage controller and the range hood using the linkage controller |
| CN106996586B (en) * | 2017-05-18 | 2023-07-28 | 浙江帅康电气股份有限公司 | Fresh air linkage controller and range hood using same |
| CN109079286A (en) * | 2018-08-27 | 2018-12-25 | 上海锅炉厂有限公司 | TIG weld isolated from power interface circuit |
| CN109079286B (en) * | 2018-08-27 | 2024-02-02 | 上海锅炉厂有限公司 | TIG welding power isolation interface circuit |
| CN111257612A (en) * | 2020-01-17 | 2020-06-09 | 南京瑞控电气有限公司 | Isolation circuit for realizing linear pulse electric quantity based on electromagnetic sensor |
| CN111257612B (en) * | 2020-01-17 | 2022-02-25 | 南京瑞控电气有限公司 | Isolation circuit for realizing linear pulse electric quantity based on electromagnetic sensor |
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