CN206216091U - A kind of control circuit for realizing welding machine outputting current steadily - Google Patents
A kind of control circuit for realizing welding machine outputting current steadily Download PDFInfo
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- CN206216091U CN206216091U CN201720225606.4U CN201720225606U CN206216091U CN 206216091 U CN206216091 U CN 206216091U CN 201720225606 U CN201720225606 U CN 201720225606U CN 206216091 U CN206216091 U CN 206216091U
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Abstract
The utility model is related to a kind of control circuit for realizing welding machine outputting current steadily, including two control loops, outside Voltage loop control loop and internal current ring control loop, the error that welding output voltage is formed with given voltage enters internal current ring control loop as input, the output signal of internal current ring control loop enters outside Voltage loop control loop by electric arc, the voltage PI regulator of electronic inductor control circuit control outside Voltage loop, reach the purpose of stabilization output current, the utility model reduces welding machine volume, reduce production cost, improve service efficiency, and can very flexible controlled output curent change, the utility model control circuit is simple and reliable, cost increases few, entity reactor before more importantly comparing greatly reduces electric energy loss.
Description
Technical field
The utility model relates to a kind of control circuit for realizing welding machine outputting current steadily, more particularly to a kind of IGBT
Contravariant CO2The control circuit of Arc Welding Power outputting current steadily.
Background technology
Due to inverter type welder energy-conservation, it is light, welding adaptability it is good the advantages of, the market demand increase quickly, but, in order that
Inverter type welder can adapt to various welding procedures, and the change of its output current will fully meet welding to curent change static characteristic
With the requirement of dynamic characteristic.
At present using the method for series connection output reactance device more than stabilization inverter type welder output current.Disadvantage of this is that reactance
The too big influence dynamic property of device, the starting the arc and spot welding characteristics are bad, and inductance value is too small, and stabilization welding arc stablility is again impacted,
Other reactor, because the presence of perception can consume a part of electric energy, not only have impact on the power supply matter of power network in actual operation
Amount, can more form the loss of power network electric energy, can also form unnecessary economic loss, be the problem for being worth hig diligence.
Utility model content
The purpose of this utility model is exactly to overcome disadvantages described above, there is provided a kind of control for realizing welding machine outputting current steadily
Circuit processed, the circuit is simple and reliable, and cost increases few, it is often more important that the entity reactor before comparing greatly reduces electricity
Can loss.
The utility model is adopted the following technical scheme that：
A kind of control circuit for realizing welding machine outputting current steadily, including two control loops, outside Voltage loop are controlled back
Road and internal current ring control loop, the error that welding output voltage is formed with given voltage enter internal current ring as input
Control loop, the output signal of internal current ring control loop enters outside Voltage loop control loop by electric arc.
The outside voltage control loop includes voltage PI regulator, electronic inductor control circuit and amplifier, described
The integral coefficient of voltage PI regulator is 1/Ki, and the Ki is the inductance value of electronic inductor, is controlled by the electronic inductor
Circuit is controlled, and welding output voltage forms voltage error after voltage feedback loop with given voltage, and the error is through overvoltage
Enter internal current ring control loop as input after pi regulator, amplifier.
The electronic inductor control circuit includes resistance, inductance potentiometer, optocoupler, diode and electric capacity, the resistance
Setting 4, respectively R1, R2, R3 and R4 in circuit, the resistance R3 connects with inductance potentiometer, R3 input termination voltages
Pi regulator, inductance potentiometer output connects current regulator, and R4 output termination optocoupler colelctor electrodes, optocoupler emitter stage connects electric current tune
Section device, resistance R1, diode and electric capacity are in parallel, input termination current regulator, and R1 is connected and is grounded with diode anode, described
Optocoupler anode connects output feedback current, negative electrode connecting resistance R2 inputs, R2 output head groundings.
The internal current ring control loop includes current regulator and inverter, and feedback current adjusts letter with given value of current
Current regulator number is sent into, the output signal of current regulator enters outside voltage control loop by electric arc.
The beneficial effects of the utility model：
The utility model replaces traditional entity reactor using electronic inductor, can not only reduce welding machine volume, reduce
Production cost, improve service efficiency, and can very flexible controlled output curent change, inverter type welder output current is expired
The requirement of electric current stabilization, dynamical output electric current can flexibly change so that welding in the starting the arc and spot welding again during foot stabilization welding
Performance is more preferable.The circuit is simple and reliable, and cost increases few, it is often more important that the entity reactor before comparing is greatly reduced
Electric energy loss.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrated for explaining the application, does not constitute the restriction to the application.
Fig. 1 is utility model works schematic diagram；
Fig. 2 is the utility model electronic inductor control circuit；
Specific embodiment
Utility model is described further below in conjunction with the accompanying drawings：
As seen from Figure 1, a kind of control circuit for realizing welding machine outputting current steadily, including two control loops, outward
Side Voltage loop control loop and internal current ring control loop, the error that welding output voltage is formed with given voltage is used as input
Into internal current ring control loop, the output signal of internal current ring control loop is controlled by electric arc into outside Voltage loop
Loop.
The outside voltage control loop includes voltage PI regulator, electronic inductor control circuit and amplifier, described
The integral coefficient of voltage PI regulator is 1/Ki, and the Ki is the inductance value of electronic inductor, is controlled by the electronic inductor
Circuit is controlled, and welding output voltage forms voltage error after voltage feedback loop with given voltage, and the error is through overvoltage
Pi regulator, internal current ring control loop is entered after amplifier as input.
Electronic inductor control circuit includes resistance, inductance potentiometer W1, optocoupler U1, diode V1 and electric capacity C1,
The resistance sets 4 in circuit, respectively R1, R2, R3 and R4, and the resistance R3 connects with inductance potentiometer, R3 inputs
Termination voltage pi regulator, inductance potentiometer output connects current regulator, R4 output termination optocoupler U1 colelctor electrodes, optocoupler U1 hairs
Emitter-base bandgap grading connects current regulator, and resistance R1, diode V1 and electric capacity C1 are in parallel, input termination current regulator, R1 and diode V1
Anode is connected and is grounded, and the optocoupler U1 anodes connect output feedback current, negative electrode connecting resistance R2 inputs, R2 output head groundings.
The internal current ring control loop includes current regulator and inverter, and feedback current adjusts letter with given value of current
Current regulator number is sent into, the output signal of current regulator enters outside voltage control loop by electric arc.
The utility model controls the circuit operation principle to be：
Outside Voltage loop pi regulator is an integral element, and integral coefficient is 1/Ki, due to internal current ring opposite exterior lateral sides
Quickly, relative to the response time of outside Voltage loop, internal current ring can be equivalent to proportional component to response speed for Voltage loop,
If the proportionality coefficient of internal current ring is 1, electric power output voltage is Uo, voltage set-point is Ug, electric power outputting current is Io, electricity
Stream set-point is IiFor electric current loop, given value of current is exported equal to electric current：
I1≈I0
For the voltage PI regulator of outside Voltage loop, the electric current of its output is equal to the input of internal current ring：
Both sides take differential and obtain：
As change KiValue can change current-rising-rate and rate of descent, KiThe referred to as inductance value of electronic inductor.In this reality
With in novel electron reactor control loop, electronic inductor is circumscribed with an inductance potentiometer, and when arc voltage is reduced, voltage is missed
The output increase of difference amplifier, the size for adjusting inductance potentiometer can change the climbing of voltage on electric capacity so as to change electric current
Climbing, be equal to the change of electronic inductor inductance value.
Electronic inductor controls the circuit operation principle to be：
As output feedback current IoDuring for high potential, optocoupler U1 conductings, current pathway R4, by controlling C1 capacitor charge and discharges
Process, fine setting is delivered to the signal of current regulator, reaches the purpose of electric current stabilization output；As output feedback current IoIt is low electricity
During position, optocoupler U1 is closed, current pathway R3, by adjusting the tissue of external inductance potentiometer W1, controls C1 capacitor charge and discharge mistakes
Journey, fine setting is delivered to the signal of current regulator, reaches the purpose of electric current stabilization output.
It is not new to this practicality although above-mentioned be described with reference to accompanying drawing to specific embodiment of the present utility model
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Various modifications or deform still in protection model of the present utility model that field technique personnel make by need not paying creative work
Within enclosing.
Claims (5)
1. a kind of control circuit for realizing welding machine outputting current steadily, it is characterised in that including two control loops, outside voltage
Ring control loop and internal current ring control loop, the error that welding output voltage is formed with given voltage enter interior as input
Side current loop control loop, the output signal of internal current ring control loop enters outside Voltage loop control loop by electric arc.
2. the control circuit of welding machine outputting current steadily is realized as claimed in claim 1, it is characterised in that the outside voltage
Control loop includes voltage PI regulator, electronic inductor control circuit and amplifier, and welding output voltage is returned through Voltage Feedback
The given voltages of Lu Houyu form voltage error, and the error enters inner side after amplifier by voltage PI regulator as input
Current loop control loop.
3. a kind of control circuit for realizing welding machine outputting current steadily as claimed in claim 2, it is characterised in that the voltage
The integral coefficient of pi regulator is 1/Ki, and the Ki is the inductance value of electronic inductor, and circuit is controlled by the electronic inductor
Control.
4. a kind of control circuit for realizing welding machine outputting current steadily as claimed in claim 1, it is characterised in that the electronics
Reactor control circuit includes a resistance, and inductance potentiometer, optocoupler, diode and electric capacity, the resistance set 4 in circuit
Individual, respectively R1, R2, R3 and R4, the resistance R3 connect with inductance potentiometer, R3 input termination voltage PI regulators, inductance
Potentiometer output connects current regulator, R4 output termination optocoupler colelctor electrodes, and optocoupler emitter stage connects current regulator, resistance R1,
Diode and electric capacity are in parallel, and input termination current regulator, R1 is connected and is grounded with diode anode, and the optocoupler anode connects defeated
Go out feedback current, negative electrode connecting resistance R2 inputs, R2 output head groundings.
5. a kind of control circuit for realizing welding machine outputting current steadily as claimed in claim 1, the internal current ring control
Loop includes current regulator and inverter, and feedback current sends into current regulator with given value of current Regulate signal, and electric current is adjusted
The output signal for saving device enters outside voltage control loop by electric arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225606.4U CN206216091U (en) | 2017-03-09 | 2017-03-09 | A kind of control circuit for realizing welding machine outputting current steadily |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225606.4U CN206216091U (en) | 2017-03-09 | 2017-03-09 | A kind of control circuit for realizing welding machine outputting current steadily |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206216091U true CN206216091U (en) | 2017-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720225606.4U Active CN206216091U (en) | 2017-03-09 | 2017-03-09 | A kind of control circuit for realizing welding machine outputting current steadily |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108453346A (en) * | 2018-04-13 | 2018-08-28 | 昆明理工大学 | A kind of intellectual infrared temperature welding machine |
-
2017
- 2017-03-09 CN CN201720225606.4U patent/CN206216091U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108453346A (en) * | 2018-04-13 | 2018-08-28 | 昆明理工大学 | A kind of intellectual infrared temperature welding machine |
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