CN206550478U - Electric welding machine protection circuit - Google Patents
Electric welding machine protection circuit Download PDFInfo
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- CN206550478U CN206550478U CN201720230231.0U CN201720230231U CN206550478U CN 206550478 U CN206550478 U CN 206550478U CN 201720230231 U CN201720230231 U CN 201720230231U CN 206550478 U CN206550478 U CN 206550478U
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Abstract
The utility model discloses a kind of electric welding machine protection circuit, resistance R102 is connected with output voltage positive pole, electric capacity C89, optocoupler U4 is connected with resistance R102 successively, the 1 pin serial connection diode that described electric capacity C89 is connected to optocoupler U4 is drawn from 2 pins, subsequent series voltage stabilizing diode D110, resistance R100 connection ground wires, provided with triode respectively from 3 in described optocoupler U4, 4 pins are drawn, optocoupler U4 3 pins are connected with diode D101 to port A1, optocoupler U3 gathers port A1 electric signal outputs to PWM3846, described A1 ports output end is connected by divider resistance R15 with port A3, A3 ports output end is connected with fan delay circuit.Voltage is down to below safe voltage automatically under electric welder no-load state, and blower fan delay is stopped operating.
Description
Technical field
The utility model belongs to welding technology field, more particularly to a kind of electric welding machine protection circuit.
Background technology
Electric welding machine is one of construction equipment for being most widely used in modern industry production, and electric welding machine uses electric energy, will
Electric energy moment is converted to heat energy, and high-temperature electric arc that it is produced using the electrode of output end two in instantaneous short circuit or electric discharge melts electricity
Solder and materials to be welded on welding rod, to realize the purpose for combining them, electric welding machine is adapted to work under dry environment, no
Too many requirement is needed, simple to operate because of compact, easy to use, speed, the advantages of weld seam is solid after welding is used extensively
In every field.The existing electric welder no-load voltage of in the market is that 60~90V far surpasses human safety voltage 36V, during weld job,
Operating voltage needed for pilot arc is in 16~35V or so, more than the 12V safe voltages in canister or under wet environment,
There is larger electric shock accidents hidden danger, particularly under bad welding surroundings such as in metal structure, in canister, pipeline or
Flush point is welded under water, seriously threatens the life security of welders；In addition under electric welder no-load state, do not weld
Shi Fengji can also be operated ceaselessly always, wasted electric energy and reduced service life of fan.
Utility model content
The purpose of this utility model is to provide a kind of electric welding machine protection circuit, automatic by electricity under electric welder no-load state
Below pressure drop to safe voltage, and blower fan delay is stopped operating, ensure safety while saving the energy.
To achieve these goals, the utility model takes following technical scheme：A kind of electric welding machine protection circuit, resistance
R102 is connected with output voltage positive pole, and electric capacity C89, optocoupler U4 are connected with resistance R102 successively, and described electric capacity C89 is connected to light
Coupling U4 1 pin serial connection diode is drawn from 2 pins, subsequent series voltage stabilizing diode D110, resistance R100 connection ground wires, institute
Drawn respectively from 3,4 pins provided with triode in the optocoupler U4 stated, optocoupler U4 3 pins are connected with diode D101 to port
A1, optocoupler U3 gather port A1 electric signal outputs to PWM3846, and described A1 ports output end passes through divider resistance R15 and end
Mouth A3 connections, A3 ports output end is connected with fan delay circuit.
In above-mentioned technical proposal, under electric welding machine energization Light Condition, electric power output voltage positive pole offer+24V voltages pass through
Electric capacity charging is carried out to electric capacity C89 so that the diode current flow between optocoupler U4 1,2 pins after resistance R102 partial pressures, this
When voltage-regulator diode D110 start working adjustment voltage, subsequent optocoupler U4 conductings drag down port A1 voltages, and port A1 passes through optocoupler
U3 accesses PWM3846 control function pin, and subsequent PWM3846 adjustment output pulse width narrows, the reduction of electric welder no-load voltage；Blower fan prolongs
When circuit receiving port A1 buck signal is connected with port A3, blower fan delay is stopped operating.
Brief description of the drawings
Fig. 1 is the utility model circuit diagram.
Embodiment
The utility model is further illustrated with reference to accompanying drawing 1：
A kind of electric welding machine protection circuit, resistance R102 is connected with output voltage positive pole, electric capacity C89, optocoupler U4 successively with electricity
R102 connections are hindered, the 1 pin serial connection diode that described electric capacity C89 is connected to optocoupler U4 is drawn from 2 pins, subsequent series voltage stabilizing
Drawn respectively from 3,4 pins provided with triode in diode D110, resistance R100 connection ground wires, described optocoupler U4, optocoupler
U4 3 pins are connected with diode D101 to port A1, and optocoupler U3 gathers port A1 electric signal outputs to PWM3846, described
A1 ports output end is connected by divider resistance R15 with port A3, and A3 ports output end is connected with fan delay circuit.Electric welding machine
Under energization Light Condition, electric power output voltage positive pole offer+24V voltages after resistance R102 partial pressures to electric capacity C89 by carrying out
Electric capacity charges so that the diode current flow between optocoupler U4 1,2 pins, and at this moment voltage-regulator diode D110, which starts working, adjusts electricity
Pressure, subsequent optocoupler U4 conductings drag down port A1 voltages, and port A1 accesses PWM3846 control function pin by optocoupler U3, then
PWM3846 adjustment output pulse widths narrow, the reduction of electric welder no-load voltage；Fan delay circuit is connected receiving port A1 with port A3
Buck signal, then make blower fan delay stop operating.
Described output voltage positive pole is also connected with resistance R103, diode D100, resistance R104, described resistance in turn
R104 with output OUT positive poles be connected, output voltage positive pole be located between resistance R103, resistance R102, protection electric capacity C88 and meanwhile with
Resistance R103, diode D100, electric capacity C89 connections, subsequent ground wire export.Under electric welding machine operating duty, circuit triggering
Resistance R103, diode D100, resistance R104 connect the voltage output signal that operational reception exports OUT positive poles, so that electric
Hold the electrochemical capacitor of C89 release storages, at this moment optocoupler U4 is not turned on being stopped, and PWM3846 recovers pulsewidth, and electric welding machine is normally born
Carry welding.
Described resistance R103 is in parallel with resistance R102, electric capacity C89, then access optocoupler U4 1 pin serial connection diode
Drawn from 2 pins, subsequent series voltage stabilizing diode D110, resistance R100 connection ground wires.Electric welder no-load voltage reduces size
Determined by voltage-regulator diode D110, generally floating voltage is down to 12V using 5V1 voltage-regulator diodes control circuit, work as resistance
Electric welding machine normal work when R100, voltage-regulator diode D110, optocoupler U4, diode D100, resistance R104 conduction voltage drops, circuit is not
Perform reduction floating voltage function.
Described fan delay circuit is connected including diode D102 with port A3 output end, described diode D102
The subsequent ground wire export of electric capacity C91, resistance R106, electric capacity C92, cut-off switch Q10, described cut-off switch are parallel with successively
Q10 is connected with DC fan.Port A3 is received after buck signal, and electric capacity C91 electrolysis chargings discharge after electrochemical capacitor terminates again,
Cut-off switch Q10 receives pick-off signal, and at this moment the negative terminal of DC fan is earth-free is in vacant state, and blower fan shuts down.
Claims (4)
1. a kind of electric welding machine protection circuit, it is characterised in that：Resistance R102 is connected with output voltage positive pole, electric capacity C89, optocoupler U4
It is connected successively with resistance R102, the 1 pin serial connection diode that described electric capacity C89 is connected to optocoupler U4 is drawn from 2 pins, then
Draw respectively from 3,4 pins provided with triode in series voltage stabilizing diode D110, resistance R100 connection ground wires, described optocoupler U4
Go out, optocoupler U4 3 pins are connected with diode D101 to port A1, and optocoupler U3 gathers port A1 electric signal outputs to PWM3846,
Described port A1 output ends are connected by divider resistance R15 with port A3, and A3 ports output end is connected with fan delay circuit.
2. electric welding machine protection circuit according to claim 1, it is characterised in that：Described output voltage positive pole also connects successively
Resistance R103, diode D100, resistance R104 are connected to, described resistance R104 is connected with output OUT positive poles, output voltage positive pole
Between resistance R103, resistance R102, protection electric capacity C88 is connected with resistance R103, diode D100, electric capacity C89 simultaneously, with
Ground wire is exported afterwards.
3. electric welding machine protection circuit according to claim 2, it is characterised in that：Described resistance R103 and resistance R102,
Electric capacity C89 is in parallel, and then access optocoupler U4 1 pin serial connection diode is drawn from 2 pins, subsequent series voltage stabilizing diode
D110, resistance R100 connection ground wires.
4. electric welding machine protection circuit according to claim 1, it is characterised in that：Described fan delay circuit includes two poles
Pipe D102 is connected with port A3 output end, and described diode D102 is parallel with electric capacity C91, resistance R106, electric capacity successively
The subsequent ground wire export of C92, cut-off switch Q10, described cut-off switch Q10 is connected with DC fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720230231.0U CN206550478U (en) | 2017-03-10 | 2017-03-10 | Electric welding machine protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720230231.0U CN206550478U (en) | 2017-03-10 | 2017-03-10 | Electric welding machine protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206550478U true CN206550478U (en) | 2017-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720230231.0U Active CN206550478U (en) | 2017-03-10 | 2017-03-10 | Electric welding machine protection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN206550478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115662086A (en) * | 2022-09-05 | 2023-01-31 | 华能淮阴第二发电有限公司 | No-load voltage alarm device of electric welding machine |
-
2017
- 2017-03-10 CN CN201720230231.0U patent/CN206550478U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115662086A (en) * | 2022-09-05 | 2023-01-31 | 华能淮阴第二发电有限公司 | No-load voltage alarm device of electric welding machine |
| CN115662086B (en) * | 2022-09-05 | 2024-01-23 | 华能淮阴第二发电有限公司 | Alarm device of electric welding machine under high no-load voltage |
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