CN206293886U - A kind of dual-protection circuit of electric welding machine voltage-multiplying circuit - Google Patents
A kind of dual-protection circuit of electric welding machine voltage-multiplying circuit Download PDFInfo
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- CN206293886U CN206293886U CN201720009671.3U CN201720009671U CN206293886U CN 206293886 U CN206293886 U CN 206293886U CN 201720009671 U CN201720009671 U CN 201720009671U CN 206293886 U CN206293886 U CN 206293886U
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Abstract
The utility model discloses a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit, including：Sample circuit, drive control circuit and protection circuit; sample circuit is used for the voltage with monitoring electric welding machine major loop; over-pressed signal is sequentially transferred to drive control circuit and protection circuit when main circuit voltage exceedes preset value; drive control circuit and protection circuit are used to turn off driving control signal and multiplication of voltage control signal when over-pressed signal is received; the utility model reaches the advantage of double protection with the signal of the control of the output signal of drive control part and times laminate section is simultaneously turned off when multiplication of voltage output is too high.
Description
Technical field
The utility model is related to electric welding machine technical field, more particularly to a kind of electric welding machine voltage-multiplying circuit duplicate protection electricity
Road.
Background technology
Electric current is big, secondary idle load output voltage is high, use danger when the protection of electric welding machine multiplication of voltage is directed to electric welder no-load
What high the characteristics of developed, the reasonable employment of electric welding machine protection circuit ensure that the personal safety of operating personnel, and can obtain
Preferable power savings are obtained, the economic benefit and social benefit of enterprise is improved.
Major part AC220V/380V twin voltage machines use voltage-multiplying circuit pattern currently on the market, i.e., in 220V,
It is direct current 600V so as to obtain the VD higher than AC380V commutating voltage using voltage multiplying rectifier, but due to electricity
Net voltage pulsation so that the DC voltage of multiplication of voltage output is often higher, now needs a kind of protection circuit in its overtension
Machine upkeep is allowed while do not damage the internal components of machine, traditional overvoltage crowbar is simple by drive control part
Output signal shut-off, not shut-off control times laminate section control signal, effect on driving birds is not good.
Therefore, existing electric welding machine technical field urgent need is a kind of believes the output of drive control part when multiplication of voltage output is too high
Number and the signal of control of times laminate section simultaneously turn off, reach the duplicate protection electricity of the electric welding machine voltage-multiplying circuit of double protection
Road.
The content of the invention
In order to solve the above-mentioned technical problem, the utility model provides a kind of duplicate protection electricity of electric welding machine voltage-multiplying circuit
Road, technical scheme is as follows：
A kind of dual-protection circuit of electric welding machine voltage-multiplying circuit, it is characterised in that including：Sample circuit, drive control electricity
Road and protection circuit, the sample circuit are used for the voltage with monitoring electric welding machine major loop, exceed in the main circuit voltage pre-
If over-pressed signal is sequentially transferred into drive control circuit and protection circuit, the drive control circuit and the protection electricity during value
Road is used to turn off driving control signal and multiplication of voltage control signal when the over-pressed signal is received.
Further, also include：VD VCC+ ends, VD VCC- ends, hair and connect ripple signal port
Receive signal port.
Further, the sample circuit includes：First resistor, the first diode and the second diode, the first resistor
One end be connected with VD VCC+ ends, the other end is connected with the negative pole of the first diode, the positive pole of the first diode
Positive pole with the second diode is connected.
Further, the drive control circuit includes：First electric capacity, the first optocoupler and the second electric capacity, first electric capacity
Positive pole connect the positive pole of second diode and 1 pin of first optocoupler, 3 pin of first optocoupler are by described the
Two capacity earths, the 4 pin connection hair ripple signal port of first optocoupler, negative pole and the direct current of first electric capacity
Output voltage VCC- ends connect.
Further, the protection circuit includes：Controllable silicon, second resistance, the 3rd diode and the second optocoupler, described second
1 pin of optocoupler is connected with 2 pin of first optocoupler, and 2 pin of second optocoupler connect the VD VCC- ends,
4 pin of second optocoupler connect the second resistance, and 3 pin of second optocoupler connect the negative pole of the 3rd diode,
The positive pole of the 3rd diode connects the controllable silicon.
Further, absorbing circuit is provided between the 3rd diode and the controllable silicon, for absorbing interference ripple,
The absorbing circuit includes 3rd resistor and the 3rd electric capacity.
Further, the protection circuit also includes power supply, for the Silicon controlled supply, the power supply and described second
Resistance is connected.
Further, the 3rd resistor and the 3rd electric capacity are parallel relationships.
Further, 3 pin and 2 pin of the controllable silicon connect the reception signal port and the 3rd diode respectively
Positive pole, the 1 pin ground connection of the controllable silicon.
Further, the preset value of the voltage is 700V.
Compared with prior art, advantage of the present utility model and good effect are：
1st, the utility model carries out insulation blocking using the symplectic photoelectricity of light, prevents the forceful electric power of major loop because line voltage ripple
The normal work of the interference effect control loop of movable property life.
2nd, the utility model be provided with 3rd resistor and the 3rd capacitor bank into absorbing circuit, absorb interference ripple, prevent
Only controllable silicon delays work when work is not needed.
3rd, the utility model is provided with the 3rd diode, and pressure limiting effect is played to controllable silicon.
4th, the utility model solves twin voltage electric welding machine when voltage-multiplying circuit output voltage is too high, makes machine idle
Meanwhile, the device of machine multiplication of voltage correlation major loop is not damaged, reach double protection.
5th, controllable silicon needs to restart and can just resume work, the main correlator of the voltage-multiplying circuit that adequately protected
Part.
6th, when VD is more than 700V, the source of welding current will self-protecting, closing driving control for the utility model
Circuit processed and protection circuit, so as to protect voltage-multiplying circuit.
7th, in the case where line voltage is unstable, the utility model can also avoid well VD because
Net the fluctuation of pressure and damage related device.
Brief description of the drawings
Describe the utility model in detail with reference to the accompanying drawings and detailed description：
Fig. 1 is a kind of dual-protection circuit figure of electric welding machine voltage-multiplying circuit of the utility model.
Specific embodiment
As shown in figure 1, a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit, including：Sample circuit 1, drive control electricity
Road 2 and protection circuit 3, sample circuit 1 are used for the voltage with monitoring electric welding machine major loop, when main circuit voltage exceedes preset value
Over-pressed signal is sequentially transferred to drive control circuit 2 and protection circuit 3, drive control circuit 2 and protection circuit 3 are used to connect
Driving control signal and multiplication of voltage control signal are turned off when receiving over-pressed signal；Also include：It is VD VCC+ end VCC+, straight
Stream output voltage VCC- end VCC-, hair ripple signal port 10 and reception signal port 20, VD VCC+ end VCC+ connect
The positive pole of electric welding machine major loop is connect, VD VCC- end VCC- connect the negative pole of electric welding machine major loop；Sample circuit bag
Include：One end of first resistor R1, the first diode D1 and the second diode D2, first resistor R1 and VD VCC+ ends
VCC+ is connected, and the other end is connected with the negative pole of the first diode D1, and the positive pole of the first diode D1 and the second diode D2 are just
Pole connects；Drive control circuit 2 includes：The positive pole of the first electric capacity C1, the first optocoupler U1 and the second electric capacity C2, the first electric capacity C1 connects
The positive pole of the second diode D2 and 1 pin of the first optocoupler Q1 are connect, 3 pin of the first optocoupler Q1 are grounded by the second electric capacity C2, first
The 4 pin connection hair ripple signal port 10 of optocoupler U1, the negative pole of the first electric capacity C1 is connected with VD VCC- end VCC-；Protect
Protection circuit 3 includes：Controllable silicon Q1, second resistance R2, the 3rd diode D3 and the second optocoupler U2,1 pin of the second optocoupler U2 and
The 2 pin connection of one optocoupler U1,4 pin of 2 pin connection VD VCC- the end VCC-, the second optocoupler U2 of the second optocoupler U2 connect
3 pin for meeting second resistance R2, the second optocoupler U2 connect the negative pole of the 3rd diode D3, and the positive pole connection of the 3rd diode D3 is controllable
Silicon Q1；Absorbing circuit is provided between 3rd diode D3 and controllable silicon Q1, for absorbing interference ripple, absorbing circuit includes the
Three resistance R3 and the 3rd electric capacity C3；Protection circuit 3 also includes power supply V, for being powered to controllable silicon Q1, power supply V and second resistance
R2 is connected；3rd resistor R3 and the 3rd electric capacity C3 are parallel relationships；3 pin and 2 pin of controllable silicon Q1 connect reception signal end respectively
The positive pole of the diode D3 of mouth 20 and the 3rd, the 1 pin ground connection of controllable silicon Q1；The preset value of voltage is 700V, when voltage is more than 700V
When the first diode D1 and the second diode D2 conductings, so as to connect drive control circuit and protection circuit, turn off drive control
Signal and multiplication of voltage control signal.
Specific work process of the present utility model is：Under normal circumstances（When main circuit voltage is not above 700V）, the
One diode D1 and the second diode D2 are not turned on, electric welding machine normal work.When VD VCC+ end VCC+ with it is straight
When stream output voltage VCC- ends VCC- voltages exceed direct current 700V, the first diode D1 and the second diode D2 is turned on, the first light
1,2 pin of coupling U1 and the second optocoupler U2 are both turned on work, and 3 pin and 4 pin of the first optocoupler U1 and the 2nd U2 are also both turned on, hair ripple letter
Number port 10 is grounded sequentially through 4 pin of the first optocoupler U1 and 3 pin, and voltage moves OV to, and hair ripple signal is turned off；Power supply V passes through
4 pin and 3 pin, 2 pin of the 3rd diode D3 to controllable silicon Q1 of second resistance R2 and the second optocoupler U2, controllable silicon Q1 energizations make can
1 pin of control silicon Q1 and the conducting of 3 pin, receive signal port 20 and are grounded by 3 pin of controllable silicon Q1 and 1 pin, and voltage moves OV, multiplication of voltage to
Control signal is turned off, and could recover again because controllable silicon Q1 needs restarting, the main phase of the voltage-multiplying circuit that adequately protected
Close device.
Compared with prior art, advantage of the present utility model and good effect are：
The utility model carries out insulation blocking using the symplectic photoelectricity of light, prevents the forceful electric power of major loop because voltage ripple of power network
The normal work of the interference effect control loop of generation；The utility model be provided with 3rd resistor and the 3rd capacitor bank into suction
Circuit is received, interference ripple is absorbed, prevents controllable silicon from being delayed work when work is not needed；The utility model is provided with the three or two
Pole pipe, pressure limiting effect is played to controllable silicon；It is too high in voltage-multiplying circuit output voltage that the utility model solves twin voltage electric welding machine
When, make machine idle simultaneously, the device of machine multiplication of voltage correlation major loop is not damaged, reach double protection；Controllable silicon
Needing restarting can just resume work, the main related device of the voltage-multiplying circuit that adequately protected；The utility model is straight
When stream output voltage is more than 700V, the source of welding current will self-protecting, closing drive control circuit and protection circuit, so as to protect
Voltage-multiplying circuit；In the case where line voltage is unstable, the utility model can also avoid well VD because
Related device is damaged for the fluctuation of net pressure.
General principle of the invention, principal character and advantages of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not limited to the above embodiments, simply explanation described in above-described embodiment and specification this
The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent is defined.
Claims (10)
1. a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit, it is characterised in that including：Sample circuit, drive control circuit
And protection circuit, the sample circuit is used for the voltage with monitoring electric welding machine major loop, in the main circuit voltage more than default
Over-pressed signal is sequentially transferred to drive control circuit and protection circuit, the drive control circuit and the protection circuit during value
For turning off driving control signal and multiplication of voltage control signal when the over-pressed signal is received.
2. a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit according to claim 1, it is characterised in that also include：Directly
Stream output voltage VCC+ ends, VD VCC- ends, hair ripple signal port and reception signal port.
3. a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit according to claim 2, it is characterised in that the sampling
Circuit includes：First resistor, the first diode and the second diode, one end and the VD VCC+ of the first resistor
End connection, the other end is connected with the negative pole of the first diode, and the positive pole of the first diode is connected with the positive pole of the second diode.
4. a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit according to claim 3, it is characterised in that the driving
Control circuit includes：First electric capacity, the first optocoupler and the second electric capacity, the positive pole of first electric capacity connect second diode
Positive pole and first optocoupler 1 pin, 3 pin of first optocoupler are by second capacity earth, first optocoupler
The 4 pin connection hair ripple signal port, the negative pole of first electric capacity is connected with the VD VCC- ends.
5. a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit according to claim 4, it is characterised in that the protection
Circuit includes：Controllable silicon, second resistance, the 3rd diode and the second optocoupler, 1 pin of second optocoupler and first optocoupler
The connection of 2 pin, 2 pin of second optocoupler connect the VD VCC- ends, the 4 pin connection institute of second optocoupler
Second resistance is stated, 3 pin of second optocoupler connect the negative pole of the 3rd diode, the positive pole connection of the 3rd diode
The controllable silicon.
6. the dual-protection circuit of a kind of electric welding machine voltage-multiplying circuit according to claim 5, it is characterised in that the described 3rd
Absorbing circuit is provided between diode and the controllable silicon, for absorbing interference ripple, the absorbing circuit includes the 3rd electricity
Resistance and the 3rd electric capacity.
7. a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit according to claim 5, it is characterised in that the protection
Circuit also includes power supply, for the Silicon controlled supply, the power supply to be connected with the second resistance.
8. the dual-protection circuit of a kind of electric welding machine voltage-multiplying circuit according to claim 6, it is characterised in that the described 3rd
Resistance and the 3rd electric capacity are parallel relationships.
9. the dual-protection circuit of a kind of electric welding machine voltage-multiplying circuit according to claim 6, it is characterised in that described controllable
3 pin and 2 pin of silicon connect the positive pole of the reception signal port and the 3rd diode respectively, and 1 pin of the controllable silicon connects
Ground.
10. a kind of dual-protection circuit of electric welding machine voltage-multiplying circuit according to claim 1, it is characterised in that the electricity
The preset value of pressure is 700V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720009671.3U CN206293886U (en) | 2017-01-05 | 2017-01-05 | A kind of dual-protection circuit of electric welding machine voltage-multiplying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720009671.3U CN206293886U (en) | 2017-01-05 | 2017-01-05 | A kind of dual-protection circuit of electric welding machine voltage-multiplying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206293886U true CN206293886U (en) | 2017-06-30 |
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ID=59098406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720009671.3U Active CN206293886U (en) | 2017-01-05 | 2017-01-05 | A kind of dual-protection circuit of electric welding machine voltage-multiplying circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN206293886U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308160A (en) * | 2020-03-02 | 2020-06-19 | 深圳固邦科技有限公司 | Voltage detection circuit with self-locking function for electric welding machine |
-
2017
- 2017-01-05 CN CN201720009671.3U patent/CN206293886U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308160A (en) * | 2020-03-02 | 2020-06-19 | 深圳固邦科技有限公司 | Voltage detection circuit with self-locking function for electric welding machine |
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