CN206226272U - Source of welding current circuit - Google Patents
Source of welding current circuit Download PDFInfo
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- CN206226272U CN206226272U CN201621252562.6U CN201621252562U CN206226272U CN 206226272 U CN206226272 U CN 206226272U CN 201621252562 U CN201621252562 U CN 201621252562U CN 206226272 U CN206226272 U CN 206226272U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The utility model provides a kind of source of welding current circuit, and the source of welding current circuit includes the rectification circuit, pfc circuit, accumulator and the inverter circuit that are sequentially connected, and the pfc circuit includes：Two Boost circuits of parallel connection, pfc controller, input voltage sample circuit, drive circuit and zero current detecting circuits.Source of welding current circuit of the present utility model, the control electric current of pfc controller by setting drive circuit amplified and the break-make of power switch controlled with this, therefore amplified control electric current is not easily susceptible to influence, and power switch is not easy to produce maloperation；By setting zero current detecting circuit and input voltage sample circuit, thus it is completely the same using the waveform of the voltage after waveform and the rectified circuit rectifies of the output current of pfc controller control Boost circuit, the power factor of source of welding current circuit can be improved.Source of welding current circuit of the present utility model, circuit is simple, and power factor is high, output stabilization.
Description
Technical field
The utility model is related to a kind of source of welding current circuit.
Background technology
Increasingly mature with PFC technologies, PFC technologies are solving electromagnetic interference and emc issue and Width funtion
Advantage in working range is increasingly apparent.PFC technologies obtain first-stage success at home in the application of the source of welding current, and
Small-power source of welding current aspect has started to application.
But prior art all uses substance Boost pfc circuits, and substance Boost pfc circuits can not meet high-power
The requirement of arc-welding.The power factor of other existing Boost pfc circuits is relatively low, easily causes energy waste.
In view of this, it is necessary to existing source of welding current circuit is improved, to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of source of welding current circuit, with solve existing Boost PFC power and
The relatively low problem of power factor.
To achieve the above object, the utility model provides a kind of source of welding current circuit, and the source of welding current circuit includes
Rectification circuit, pfc circuit, accumulator and the inverter circuit being sequentially connected, the pfc circuit include：
Two Boost circuits of parallel connection；
Pfc controller；
Input voltage sample circuit, the input of the input voltage sample circuit and the output end phase of the rectification circuit
Even, the output end of the input voltage sample circuit is connected with the pfc controller；
Drive circuit, the input of the drive circuit is connected with the pfc controller, the output end of the drive circuit
It is connected with two Boost circuits；
Zero current detecting circuit, the input of the zero current detecting circuit is connected with two Boost circuits, described
The output end of zero current detecting circuit is connected with the pfc controller.
Used as further improvement of the utility model, the drive circuit includes that the first driving element and second drives unit
Part, two Boost circuits are respectively the first Boost circuit and the second Boost circuit, first Boost circuit and
Two Boost circuits include the first boost inductance and the second boost inductance, the first power switch and the second power switch, first respectively
One end of diode and the second diode, first boost inductance and the second boost inductance and the output end phase of rectification circuit
Even, the other end of first boost inductance and the second boost inductance respectively with first diode and the sun of the second diode
Extremely it is connected, the anode of first power switch is connected with the anode of the first diode, the control pole of first power switch
It is connected with the first driving element, the anode of second power switch is connected with the anode of the second diode, second power
Switch control rule pole is connected with the second driving element.
As further improvement of the utility model, the zero current detecting circuit include the first zero current detecting circuit and
Second zero current detecting circuit, the input of first zero current detecting circuit is connected with the anode of the first diode, described
The output end of the first zero current detecting circuit is connected with pfc controller；The input of second zero current detecting circuit and
The anode of two diodes is connected, and the output end of second zero current detecting circuit is connected with pfc controller.
Used as further improvement of the utility model, source of welding current circuit also includes PFC output current sample circuits, described
The input of PFC output current sample circuits is connected with the negative electrode of the first power switch and the second power switch, the PFC outputs
The output end of current sampling circuit is connected with the pfc controller.
Used as further improvement of the utility model, the accumulator includes energy storage filter capacitor and PFC output voltages
Sample circuit, one end of the energy storage filter capacitor is connected with the negative electrode of first diode and the second diode, the storage
The energy other end of filter capacitor is respectively connected with the input of the input of inverter circuit and PFC output voltage sampling circuits, institute
The output end for stating PFC output voltage sampling circuits is connected with the pfc controller.
Used as further improvement of the utility model, the PFC output voltage sampling circuits include a PFC output voltages
Sample circuit and the 2nd PFC output voltage sampling circuits, a PFC output voltage sampling circuits and the 2nd PFC are defeated
Go out negative electrode of the input of voltage sampling circuit with first diode and the second diode to be connected, a PFC is defeated
The output end for going out voltage sampling circuit and the 2nd PFC output voltage sampling circuits is connected with the pfc controller.
Used as further improvement of the utility model, the pfc controller is model UCC28061 control chips.
Used as further improvement of the utility model, first driving element and second driving element are models
It is the driving chip of MIC4422.
The beneficial effects of the utility model are：Source of welding current circuit of the present utility model, by setting drive circuit by PFC
The control electric current of controller is amplified and the break-make of power switch is controlled with this, therefore amplified control electric current is not easily susceptible to shadow
Ring, power switch is not easy to produce maloperation；By setting zero current detecting circuit and input voltage sample circuit, so as to utilize
The waveform of the voltage after waveform and the rectified circuit rectifies of the output current of pfc controller control Boost circuit is completely the same,
The power factor of source of welding current circuit can be improved.Source of welding current circuit of the present utility model, circuit is simple, and power factor is high,
Output stabilization.
Brief description of the drawings
Fig. 1 is the frame diagram of the utility model source of welding current circuit；
Fig. 2 is the schematic diagram of the utility model source of welding current circuit；
Fig. 3 is rectification circuit, Boost circuit, drive circuit, the circuit diagram of energy storage filter capacitor in Fig. 2；
Fig. 4 is exported to the input voltage sample circuit that be connected with Fig. 3 circuits, zero current detecting circuit, PFC in Fig. 2
The circuit diagram of current sampling circuit, PFC output voltage sampling circuits and pfc controller.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with the accompanying drawings and specific implementation
Example is described in detail to the utility model.
As shown in Figures 1 to 4, source of welding current circuit of the present utility model includes the rectification circuit, the PFC electricity that are sequentially connected
Road, accumulator and inverter circuit.
The rectification circuit is connected with AC power, and it is the direct current of steamed bun shape that AC rectification is formed into waveform.
The PFC（PFC）Circuit includes two Boost of parallel connection（Boosting）It is circuit, pfc controller U2, defeated
Enter voltage sampling circuit, drive circuit, zero current detecting circuit, PFC output currents sample circuit and PFC output voltages sampling electricity
Road.
Two Boost circuits are respectively the first Boost circuit and the second Boost circuit, two Boost circuits
Alternation.First Boost circuit and the second Boost circuit include the first boost inductance L1 and the second boost inductance respectively
L2, the first power switch Q1 and the second power switch Q2, the first diode D5 and the second diode D6.
One end of the first boost inductance L1 and the second boost inductance L2 are connected with the output end of rectification circuit, and described
The other end of one boost inductance L1 and the second boost inductance L2 respectively with the first diode D5 and the sun of the second diode D6
Extremely it is connected, the anode of the first power switch Q1 is connected with the anode of the first diode D5, the second power switch Q2's
Anode is connected with the anode of the second diode D6.
In the present embodiment, the pfc controller U2 is model UCC28061 control chips, the pfc controller U2's
13 pin are grounded, the dc source of the external 12V of 12 pin.
In other embodiments, the pfc controller U2 also may be selected the core of model UCC28060 or UCC28019
Piece.
The input of the drive circuit is connected with the pfc controller U2, the output end of the drive circuit with two
The Boost circuit is connected.
In the present embodiment, the drive circuit includes the first driving element U1 and the second driving element U2, and described first
Driving element U1 and the second driving element U2 be be model MIC4422 driving chip.The first driving element U1
The 2nd pin be connected with 14 pin of the pfc controller U2, the 2nd pin and the pfc controller U2 of the second driving element U2
11 pin be connected.
In other embodiments, the first driving element U1 and the second driving element U2 also may be selected model
The chip of MIC4452 or MIC4416.
In the present embodiment, the 6th pin and the 7th pin of the first driving element U1 pass through 12 resistance R12 and described first
The control pole of power switch Q1 is connected, the 6th pin and the 7th pin of the second driving element U2 by 13 resistance R13 with it is described
The control pole of the second power switch Q2 is connected.
The drive circuit by receiving the control electric current that the pfc controller U2 sends, and by Current amplifier, so as to drive
The turn-on and turn-off of dynamic first power switch Q1 and the second power switch Q2, in this way, amplified control electric current is not easily susceptible to
Influence, power switch is not easy to produce maloperation.
The input of the input voltage sample circuit is connected with the output end of the rectification circuit, and the input voltage is adopted
The output end of sample circuit is connected with the pfc controller U2.The input voltage sample circuit includes 11 resistance R11 and the 5th
Resistance R5.5th resistance R5 one end is grounded, and the other end is connected with the 7th pin of pfc controller U2.The pfc controller U2 is used to
Detect the voltage after rectified circuit rectifies.
The input of the zero current detecting circuit is connected with two Boost circuits, the zero current detecting circuit
Output end be connected with the pfc controller U2.The zero current detecting circuit is used to detect the output electricity of the Boost circuit
Stream, control signal is input into when the output current of the Boost circuit is equal to 0 to the pfc controller U2.
The zero current detecting circuit includes the first zero current detecting circuit and the second zero current detecting circuit, described first
Zero current detecting circuit is connected by second resistance R2 with the 16th pin of the pfc controller U2, second zero current detection
Circuit is connected by the 1st pin that first resistor R1 is controlled with the PFC.
The waveform of the output current of the Boost circuit is consistent with the waveform of the voltage after rectified circuit rectifies, works as institute
State pfc controller U2 and receive control signal, i.e. power switch the first Boost circuit in the conduction state or the 2nd Boost
Output current on circuit is 0, and now, the pfc controller U2 judges to detect the input voltage of input voltage sample circuit,
If input voltage is also 0, the track one of the output current of the Boost circuit and the input voltage of rectification circuit is now then judged
Cause, then the power switch of the pfc controller U2 controls conducting disconnects, control another power switch conducting for disconnecting.And if defeated
Go out electric current for 0 when, input voltage is not 0, then can be calibrated by another power switch of turn on delay, time of delay according to
When output current is 0, the value of input voltage determines.
By setting zero current detecting circuit and input voltage sample circuit, so as to control the output of the Boost circuit
The track of the output voltage of electric current and rectification circuit is completely the same, so as to improve the power factor of the pfc circuit.
The input of the PFC output currents sample circuit is connected with the output end of the Boost circuit, and the PFC is defeated
The output end for going out current sampling circuit is connected with the pfc controller U2.The PFC output currents sample circuit includes the 3rd electricity
Resistance R3 and the 5th resistance R5, wherein, the 10th pin of one end pfc controller U2 of the 3rd resistor R3 is connected, the 3rd electricity
The other end for hindering R3 is connected with the 5th resistance R5, the other end and the first power switch Q1 and the second power of the 5th resistance R5
The negative electrode for switching Q2 is connected and is grounded.
The PFC output currents sample circuit is used to send the output current information of the Boost circuit to PFC controls
Device U2, the pfc controller U2 control the power output of the pfc circuit according to the size of the electric current for detecting, specific as follows：
According to the peak power output and maximum output voltage of the pfc circuit, the output current of the Boost circuit is calculated
Maximum, if the output current for detecting the PFC output currents sample circuit reaches the maximum, now controls described two
The on off operating mode of the power switch of the Boost circuit changes.
The accumulator includes energy storage filter capacitor C10 and PFC output voltage sampling circuit.The energy storage filter capacitor
One end of C10 is connected with the negative electrode of the first diode D5 and the second diode D6, the other end of the energy storage filter capacitor C10 with
The input of inverter circuit and the input of PFC output voltage sampling circuits are respectively connected with, the PFC output voltage sampling circuits
Output end be connected with the pfc controller U2.
The energy storage filter capacitor C10 is used to regulated output voltage, while electric energy can be stored, with input electric network power-fail
When also can guarantee that the normal work of load, extend output time.
The PFC output voltage sampling circuits include that a PFC output voltage sampling circuits and the 2nd PFC output voltages are adopted
The input of sample circuit, a PFC output voltage sampling circuits and the 2nd PFC output voltage sampling circuits is and institute
The negative electrode for stating the first diode D5 and the second diode D6 is connected, a PFC output voltage sampling circuits and described second
The output end of PFC output voltage sampling circuits is connected with the pfc controller U2.
The first PFC output voltage sampling circuits include the tenth resistance R10, the 6th resistance R6 and the 6th electric capacity C6, institute
The one end for stating the tenth resistance R10 is connected with the negative electrode of the first diode D5 and the second diode D6, the tenth resistance R10
One end of the other end and the 6th resistance R6, one end of the 6th electric capacity C6 and the 2nd pin of pfc controller U2 be connected, the described 6th
The other end of resistance R6 is connected with the other end of the 6th electric capacity C6.
The 2nd PFC output voltage sampling circuits include the 9th resistance R9, the 4th resistance R4 and the 4th electric capacity C4, described
One end of 9th resistance R9 is connected with the negative electrode of the first diode D5 and the second diode D6, and the 9th resistance R9's is another
One end is connected with the 8th pin of one end, one end of the 4th electric capacity C4 and the pfc controller U2 of the 4th resistance R4, and the described 6th
The other end of resistance R6 is connected with the other end of the 6th electric capacity C6.
The first PFC output voltage sampling circuits also include loop compensation circuit, and the loop compensation circuit includes the
Seven electric capacity C7, the 8th electric capacity C8 and the 8th resistance R8, one end of the 7th electric capacity C7 are connected with one end of the 8th resistance
And be grounded, the other end of the 8th resistance is connected with one end of the 8th electric capacity C8, the other end of the 8th electric capacity C8
It is connected and is connected to the 2nd pin of the pfc controller U2 with the other end of the 7th electric capacity C7.
The 8th electric capacity C8 and the 8th resistance R8 composition low-frequency ripple attenuation compensations, by low-frequency ripple in loop ripple
Attenuation by absorption is conducive to the raising of power factor and the output of stabling current to 2%.The 7th electric capacity C7 declines for high frequency ripple
Subtract compensation, be used to eliminate high-frequency interferencing signal, overall loop is more stablized.
The first PFC output voltage sampling circuits also include the 7th resistance R7, and described 7th resistance R7 one end connects institute
The 3rd pin of pfc controller U2 is stated, the other end is grounded, and the 7th resistance R7 is timing resistor, is used to determine PWM（Pulse is wide
Degree）The maximum ON time and working frequency of signal.
Output voltage and pfc controller U2 that the pfc controller U2 passes through relatively more described PFC output voltage sampling circuits
The threshold voltage of inner setting, when the output voltage of the PFC output voltage sampling circuits is higher than threshold voltage, control is described
Two on off operating modes of the power switch of the Boost circuit change.In this way, realizing the overvoltage protection of the pfc circuit.
Source of welding current circuit of the present utility model, is amplified the control electric current of pfc controller U2 by setting drive circuit
And the break-make of power switch is controlled with this, therefore amplified control electric current is not easily susceptible to influence, power switch is not easy to produce
Maloperation；By setting zero current detecting circuit and input voltage sample circuit, so as to control Boost using pfc controller U2
The waveform of the voltage after the waveform of the output current of circuit and rectified circuit rectifies is completely the same, can improve source of welding current electricity
The power factor on road.Source of welding current circuit of the present utility model, circuit is simple, and power factor is high, output stabilization.
Above example is only used to illustrate the technical solution of the utility model and unrestricted, although with reference to preferred embodiment pair
The utility model has been described in detail, it will be understood by those within the art that, can be to technology of the present utility model
Scheme is modified or equivalent, without deviating from the spirit and scope of technical solutions of the utility model.
Claims (8)
1. a kind of source of welding current circuit, it is characterised in that：The source of welding current circuit includes the rectification circuit, the PFC that are sequentially connected
Circuit, accumulator and inverter circuit, the pfc circuit include：
Two Boost circuits of parallel connection；
Pfc controller；
Input voltage sample circuit, the input of the input voltage sample circuit is connected with the output end of the rectification circuit,
The output end of the input voltage sample circuit is connected with the pfc controller；
Drive circuit, the input of the drive circuit is connected with the pfc controller, the output end of the drive circuit and two
The individual Boost circuit is connected；
Zero current detecting circuit, the input of the zero current detecting circuit is connected with two Boost circuits, zero electricity
The output end of current detection circuit is connected with the pfc controller.
2. source of welding current circuit according to claim 1, it is characterised in that：The drive circuit includes the first driving element
With the second driving element, two Boost circuits are respectively the first Boost circuit and the second Boost circuit, described first
Boost circuit and the second Boost circuit include the first boost inductance and the second boost inductance, the first power switch and second respectively
One end and the rectified current of power switch, the first diode and the second diode, first boost inductance and the second boost inductance
The output end on road is connected, the other end of first boost inductance and the second boost inductance respectively with first diode and the
The anode of two diodes is connected, and the anode of first power switch is connected with the anode of the first diode, first power
The control pole of switch is connected with the first driving element, and the anode of second power switch is connected with the anode of the second diode,
The second power switch control pole is connected with the second driving element.
3. source of welding current circuit according to claim 2, it is characterised in that：The zero current detecting circuit includes the 1st
Current detection circuit and the second zero current detecting circuit, the input of first zero current detecting circuit and the first diode
Anode is connected, and the output end of first zero current detecting circuit is connected with pfc controller；Second zero current detecting circuit
Input be connected with the anode of the second diode, the output end of second zero current detecting circuit is connected with pfc controller.
4. source of welding current circuit according to claim 3, it is characterised in that：Source of welding current circuit also includes that PFC exports electricity
Stream sample circuit, the input of the PFC output currents sample circuit and the negative electrode of the first power switch and the second power switch
It is connected, the output end of the PFC output currents sample circuit is connected with the pfc controller.
5. source of welding current circuit according to claim 2, it is characterised in that：The accumulator includes energy storage filter capacitor
With PFC output voltage sampling circuits, one end of the energy storage filter capacitor and first diode and the moon of the second diode
Extremely it is connected, the input of the other end of the energy storage filter capacitor and the input of inverter circuit and PFC output voltage sampling circuits
End is respectively connected with, and the output end of the PFC output voltage sampling circuits is connected with the pfc controller.
6. source of welding current circuit according to claim 5, it is characterised in that：The PFC output voltage sampling circuits include
First PFC output voltage sampling circuits and the 2nd PFC output voltage sampling circuits, a PFC output voltage sampling circuits
With the input of the 2nd PFC output voltage sampling circuits with first diode and the negative electrode phase of the second diode
Even, the output end of a PFC output voltage sampling circuits and the 2nd PFC output voltage sampling circuits with it is described
Pfc controller is connected.
7. source of welding current circuit according to claim 2, it is characterised in that：The pfc controller is model
UCC28061 control chips.
8. source of welding current circuit according to claim 2, it is characterised in that：First driving element and described second is driven
Dynamic element is the driving chip of model MIC4422.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252562.6U CN206226272U (en) | 2016-11-16 | 2016-11-16 | Source of welding current circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252562.6U CN206226272U (en) | 2016-11-16 | 2016-11-16 | Source of welding current circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206226272U true CN206226272U (en) | 2017-06-06 |
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ID=58790813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621252562.6U Active CN206226272U (en) | 2016-11-16 | 2016-11-16 | Source of welding current circuit |
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| Country | Link |
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| CN (1) | CN206226272U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329908A (en) * | 2016-11-16 | 2017-01-11 | 昆山华恒焊接股份有限公司 | Welding power circuit |
-
2016
- 2016-11-16 CN CN201621252562.6U patent/CN206226272U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329908A (en) * | 2016-11-16 | 2017-01-11 | 昆山华恒焊接股份有限公司 | Welding power circuit |
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