CN103856092B - The secondary inverting of variable polarity welding power supply burning voltage again produces circuit - Google Patents
The secondary inverting of variable polarity welding power supply burning voltage again produces circuit Download PDFInfo
- Publication number
- CN103856092B CN103856092B CN201410058872.3A CN201410058872A CN103856092B CN 103856092 B CN103856092 B CN 103856092B CN 201410058872 A CN201410058872 A CN 201410058872A CN 103856092 B CN103856092 B CN 103856092B
- Authority
- CN
- China
- Prior art keywords
- circuit
- power switch
- power switching
- power
- inverter circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims abstract description 84
- 238000011084 recovery Methods 0.000 claims abstract description 31
- 238000010891 electric arc Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 14
- 208000037516 chromosome inversion disease Diseases 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000036772 blood pressure Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Inverter Devices (AREA)
Abstract
The secondary inverting burning voltage again that the present invention relates to a kind of variable polarity welding power supply produces circuit, including the first branch road and device for power switching, described first branch road includes Zener diode and fast recovery diode, described Zener diode has a negative electrode and anode, described fast recovery diode has a negative electrode and anode, described device for power switching has a gate pole, colelctor electrode and emitter stage, the negative electrode of described Zener diode and the negative electrode of described fast recovery diode connect, the anode of described Zener diode is connected with the gate pole of described device for power switching, the anode of described fast recovery diode is connected with the colelctor electrode of described device for power switching.The present invention further by this again burning voltage produce circuit be applied in secondary inverter circuit and variable polarity welding power supply.
Description
Technical field
The secondary inverting burning voltage again that the present invention relates to a kind of variable polarity welding power supply produces circuit, comprises
This secondary inverting burning voltage again produces secondary inverter circuit and the variable polarity welding power supply of circuit.
Background technology
Variable Polarity electric arc welding be a kind of important welding procedure, have arc stability, diamagnetic blow, can
Adjust the advantages such as parameter is many, Technological adaptability is strong, in submerged-arc welding, TIG, MIG, MAG etc. weld all
There is application.
The power conversion circuit of variable polarity welding power supply typically uses two-stage inverter circuit structure, three phase network
After voltage (380V/50Hz) rectified filtering, an inversion and transformer pressure-reducing, export low pressure
Square wave alternating-current, then through secondary commutation, filtering and secondary inverting, export Variable Polarity alternating current.
One of key technology of Variable Polarity electric arc welding is to ensure that output Variable Polarity alternating current zero-acrross ing moment
Arc stability.When current over-zero, electric arc moment extinguishes, and needs arcing again, and again ignites
The pace of change of the difficulty or ease of electric arc and arcing immediate current again and again burning voltage have very big relation.
Reasonably secondary inverter circuit structure, parameter and control method can make the Variable Polarity mistake of output electric current
Cheng Wending, quickly carry out.In order to realize exporting Variable Polarity, existing contravariant variable polarity welding power supply power
The secondary inverter circuit of translation circuit typically uses full bridge circuit or the semibridge system with coupling inductance
Circuit.Either both circuit is any, when carrying out exporting current polarity switching, is all in institute
When turning off with device for power switching, the high pressure of arcing again utilizing switch ends to produce forces output electric current quick
Switching direction.So that the voltage stabilization that when turning off, device for power switching two ends produce is reliable, typically can
Parallel passive buffer network between the emitter stage and colelctor electrode of device for power switching, such as by resistance and electricity
Hold the RC buffer network of composition or only simple shunt capacitance.These passive snubber networks do not only have such as
To deficiencies such as initial buffer electric current and circuit parasitic parameter sensitivities, and parameter designing process is complicated.
Summary of the invention
In view of this, it is provided that a kind of mistake that can switch in variable polarity welding power supply secondary inverter current polarity
Journey produces reliable and stable burning voltage again and designs the simple generation circuit of burning voltage again and make
With this again burning voltage to produce the secondary inverter circuit of circuit, variable polarity welding power supply the most necessary.
The secondary inverting of a kind of variable polarity welding power supply burning voltage again produce circuit, including the first branch road with
And device for power switching, described first branch road includes Zener diode and fast recovery diode, described surely
Pressure diode has a negative electrode and anode, and described fast recovery diode has a negative electrode and anode, described merit
Rate switching device has a gate pole, colelctor electrode and emitter stage, the negative electrode of described Zener diode and described
The negative electrode of fast recovery diode connects, the anode of described Zener diode and the door of described device for power switching
Pole connects, and the anode of described fast recovery diode is connected with the colelctor electrode of described device for power switching.
The full-bridge type secondary inverter circuit of a kind of variable polarity welding power supply, including four power switch circuits
The inversion full-bridge of E1, E2, E3 and E4 composition, wherein, described power switch circuit E1 and E4
Simultaneously turning on, simultaneously turn off, described power switch circuit E2 with E3 simultaneously turns on, simultaneously turns off, institute
Stating at least one circuit in power switch circuit E1 and E4 is that described secondary inverting burning voltage again produces
At least one circuit in raw circuit, and described power switch circuit E2 and E3 is described secondary inverting
Burning voltage produces circuit again.
A kind of semibridge system secondary inverter circuit of variable polarity welding power supply, including power switch circuit H1 with
And the inversion half-bridge of power switch circuit H2 composition, this power switch circuit H1 and power switch circuit
H2 be described in again burning voltage produce circuit.
Relative to prior art, the secondary inverting of the variable polarity welding power supply that the embodiment of the present invention provides fires again
Arc voltage produce circuit by between the gate pole and colelctor electrode of device for power switching bridging connect the most extensive
Multiple diode and Zener diode, thus when variable polarity welding, owing to Zener diode is at current polarity
The burning voltage produced during conversion can force the quick zero passage of welding current to commutate, such that it is able to obtain
Burning voltage again that must be stable, with the stable burning of pilot arc, this secondary inverter circuit burning voltage again
Produce when circuit is applied to variable polarity welding power supply without complicated control, it is possible to overcome existing arcing again
In secondary inverter circuit, parallel passive buffer network is to initial current, the problem of circuit parasitic parameter sensitivity.
Accompanying drawing explanation
The secondary inverting of the variable polarity welding power supply that Fig. 1 provides for first embodiment of the invention burning voltage again
Produce the circuit diagram of circuit.
The secondary inverting of the variable polarity welding power supply that Fig. 2 provides for first embodiment of the invention burning voltage again
Produce the work process schematic diagram of circuit.
The secondary inverting of the variable polarity welding power supply that Fig. 3 provides for second embodiment of the invention burning voltage again
Produce the circuit diagram of circuit.
The secondary inverting of the variable polarity welding power supply that Fig. 4 provides for third embodiment of the invention burning voltage again
Produce the circuit diagram of circuit.
The full-bridge type secondary inverter circuit of the variable polarity welding power supply that Fig. 5 provides for fourth embodiment of the invention
Circuit diagram.
Fig. 6 is the full-bridge type secondary inverter circuit current polarity conversion process of the variable polarity welding power supply of Fig. 5
Corresponding current, the waveform of voltage change over figure.
Fig. 7 is the full-bridge type secondary inverter circuit current polarity conversion process of the variable polarity welding power supply of Fig. 5
Principle schematic.
The full-bridge type secondary inverter circuit of the variable polarity welding power supply that Fig. 8 provides for fifth embodiment of the invention
Circuit diagram.
The full-bridge type secondary inverter circuit of the variable polarity welding power supply that Fig. 9 provides for sixth embodiment of the invention
Circuit diagram.
The full-bridge type secondary inverting electricity of the variable polarity welding power supply that Figure 10 provides for seventh embodiment of the invention
The circuit diagram on road.
The full-bridge type secondary inverting electricity of the variable polarity welding power supply that Figure 11 provides for eighth embodiment of the invention
The circuit diagram on road.
The semibridge system secondary inverting electricity of the variable polarity welding power supply that Figure 12 provides for ninth embodiment of the invention
The circuit diagram on road.
Figure 13 is that the semibridge system secondary inverter circuit current polarity of the variable polarity welding power supply of Figure 12 is transformed
In journey, electric current, the waveform of voltage change over figure.
Figure 14 is the semibridge system secondary inverter circuit reversal process of the variable polarity welding power supply of Figure 12
Principle schematic.
The circuit structure block diagram of the variable polarity welding power supply that Figure 15 provides for tenth embodiment of the invention.
Main element symbol description
Secondary inverting burning voltage again produces circuit 10,20,30
Full-bridge type secondary inverter circuit 100,200,300,400,500
Semibridge system secondary inverter circuit 600
Variable polarity welding power supply 700
Line voltage current rectifying and wave filtering circuit 720
Inverter circuit 740
Reduction voltage circuit 760
Secondary commutation filter circuit 780
Secondary inverter circuit 790
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Secondary to the variable polarity welding power supply that the present invention provides below in conjunction with the accompanying drawings and the specific embodiments
Inversion burning voltage again produces circuit and is described in further detail.
Referring to Fig. 1, first embodiment of the invention provides the secondary inverting of a kind of variable polarity welding power supply again
Burning voltage produces circuit 10, including one first branch road and device for power switching Q, described first branch road
Two poles are recovered with fast including Zener diode Zf and fast recovery diode Df, described Zener diode Zf
Pipe Df is connected in series.Described Zener diode Zf has an anode and a negative electrode, described fast recovery two pole
Pipe Df has anode and a negative electrode, and described device for power switching Q has a colelctor electrode, gate pole and sends out
Emitter-base bandgap grading.The negative electrode of described Zener diode Zf is connected with the negative electrode of described fast recovery diode Df, described
The anode of Zener diode Zf is connected with the gate pole of described device for power switching Q, described fast recovery two pole
The anode of pipe Df is connected with the colelctor electrode of described device for power switching Q.
Described fast recovery diode Df (FRD, Fast Recovery Diode) can forward conduction, reversely
Cut-off.Preferably, when voltage reversal, this fast recovery diode Df is converted to reversely from positive conduction
Time needed for cut-off state is shorter, i.e. reverse recovery time is shorter.Additionally, other can realize forward
Conducting, reversely the power device of cut-off is used equally in this first branch road with described Zener diode Zf even
Connect.
Described device for power switching Q can be the semiconductor device with on-off action.Preferably, described
Device for power switching Q is audion, it is further preferable that described device for power switching is IGBT switching tube.
Device for power switching Q described in the embodiment of the present invention is IGBT switching tube.
Seeing also Fig. 1-2, described burning voltage again produces circuit 10 operationally, and described power is opened
The gate pole closing device Q meets gate voltage Vg, through the output electric current Iout of secondary commutation filtering after an inversion
Input from the colelctor electrode of described device for power switching Q.This mistake that burning voltage generation circuit 10 works again
Cheng Wei:
Referring to Fig. 2 (a), device for power switching Q is open-minded: when described gate voltage Vg is in high electricity
At ordinary times, described fast recovery diode Df ends, the gate pole of described device for power switching Q and colelctor electrode it
Separated, described device for power switching Q normally, current direction is from device for power switching Q's
Colelctor electrode flows to emitting stage；
Refer to Fig. 2 (b), device for power switching Q turn off: when described gate voltage Vg is from high level
When switching to low level, described fast recovery diode Df turns on, and described Zener diode Zf starts working,
Owing to gate voltage is in low level, described device for power switching Q enters linear working state, its work
Behavior is equivalent to a Zener diode substantially, thus at the colelctor electrode of device for power switching Q and emitting stage
Between produce stable output voltage, the basic phase of voltage stabilizing value of this output voltage and described Zener diode
Deng.
Due to the effect of Zener diode Zf, thus produce stable burning voltage more in circuit, from
And can compel when current polarity converts to allow current to quick zero passage.
Refer to Fig. 1, this again arcing produce circuit 10 can farther include an anti-paralleled diode D, should
Anti-paralleled diode D is connected across between colelctor electrode and the emitter stage of described device for power switching Q.Specifically
Ground, described anti-paralleled diode D has an anode and negative electrode, the anode of described anti-paralleled diode D
Being connected with the emitter stage of described device for power switching Q, the negative electrode of described anti-paralleled diode D is with described
The colelctor electrode of device for power switching Q connects.When described device for power switching Q is described IGBT switching tube
Time, anti-paralleled diode D itself has been contained owing to IGBT switching tube is internal, now, this arcing again
Produce circuit 10 and can not also additionally include described anti-paralleled diode D.
Further, this again arcing produce circuit 10 can include one RC buffer networking, this RC buffer subsystem
Network can shield, and makes burning voltage again produce more stable.
Referring to Fig. 3, second embodiment of the invention further provides for the secondary of a kind of variable polarity welding power supply
Inversion burning voltage again produce circuit 20, this secondary inverting burning voltage again produce circuit 20 structure with
The structure that described secondary inverting burning voltage again produces circuit 10 is essentially identical, and difference is, this secondary
Inversion burning voltage again produces circuit 20 and farther includes a RC buffering networking, this RC buffer network bag
Include buffer resistance R and the buffering electric capacity C connected with this buffer resistance R.This RC buffer network can be across
It is connected between colelctor electrode and the gate pole of described device for power switching Q.
Referring to Fig. 4, third embodiment of the invention further provides for the secondary of a kind of variable polarity welding power supply
Inversion burning voltage again produce circuit 30, this secondary inverting burning voltage again produce circuit 30 structure with
The structure that described secondary inverting burning voltage again produces circuit 20 is essentially identical, and difference is, this fires again
Arc produce RC buffer network described in circuit 30 be connected across the colelctor electrode of described device for power switching Q with
Between emitting stage.
Referring to Fig. 5, fourth embodiment of the invention further provides for described in a kind of employing burning voltage again and produces
The full-bridge type secondary inverter circuit 100 of raw circuit 10,20 or 30, this full-bridge type secondary inverter circuit 100
Inversion full-bridge including four power switch circuit E1, E2, E3 and E4 compositions.Described power is opened
Closing circuit E1 and E4 to simultaneously turn on and simultaneously turn off, described power switch circuit E2 and E3 leads simultaneously
Lead to and simultaneously turn off.At least one circuit in described power switch circuit E1 and E4 is described to fire again
Arc produces at least one circuit in circuit 10,20 or 30, and described power switch circuit E2 and E3
Circuit 10,20 or 30 is produced for described arcing again.
Described power switch circuit E1 includes device for power switching Q1, described power switch circuit E2 bag
Include device for power switching Q2, described power switch circuit E3 and include device for power switching Q3, described merit
Rate on-off circuit E4 includes device for power switching Q4.The emitter stage of described device for power switching Q1 and merit
The colelctor electrode of rate switching device Q3 connects and as the first outfan, described device for power switching Q2's
Emitter stage is connected and as the second outfan with the colelctor electrode of device for power switching Q4.Described power switch
The colelctor electrode of device Q1 is connected with the colelctor electrode of device for power switching Q2 and as first input end, institute
The emitter stage of the emitter stage and device for power switching Q4 of stating device for power switching Q3 is connected and as second
Input.Described first input end and the second input are connected (this with the secondary commutation filter circuit of front end
Inventive embodiments is equivalent to constant-current source Iout).Described first outfan and the second outfan act on electricity
Arc.
In this full-bridge type secondary inverter circuit 100, in described power switch circuit E1 and E4 at least
One circuit is that described arcing again produces circuit 10,20 or 30, and described power switch circuit E2 and
At least one circuit in E3 is that described arcing again produces circuit 10,20 or 30.That is, described power is opened
Close bridging between the colelctor electrode of at least one and gate pole in device Q1 and Q4 and have described first branch road,
And bridge between the colelctor electrode of at least one and the gate pole in described device for power switching Q2 and Q3
State the first branch road.Connected mode between wherein said first branch road and described device for power switching is with described
Connected mode during burning voltage produces circuit again is identical.In fourth embodiment of the invention, described power is opened
Closing circuit E3 and E4 is that described burning voltage again produces circuit 10.
Described device for power switching Q1, Q2, Q3 and Q4 can be identical with described device for power switching Q,
It can be all the semiconductor device with on-off action.Preferably, described device for power switching Q1, Q2,
The performance parameter of Q3 and Q4 is identical.In second embodiment of the invention, described device for power switching Q1,
Q2, Q3 and Q4 are the IGBT switching tube that performance parameter is identical.
Refer to Fig. 6 and Fig. 7, the work of this full-bridge type secondary inverter circuit 100 current polarity conversion
Process and principle are as follows, and wherein Lw is cable stray inductance, and Rarc is load electric arc, flows through load
The welding current of electric arc is Iw, and the voltage at the cable of series connection and load electric arc two ends is Uw:
Referring to Fig. 7 (A), initial 0 moment, described device for power switching Q1 and Q4 turns on, Q2
Turning off with Q3, for positive polarity electric current, welding current Iw flows to be followed successively by: device for power switching Q1 →
Load electric arc Rarc → device for power switching Q4, wherein welding current Iw is described inversion rectification filter
Output electric current Iout after ripple；
Referring to Fig. 7 (B), 1 moment, device for power switching Q2 and Q3 is also switched on so that this two
Secondary inverter circuit enters common conducting state, and described welding current Iw is under the effect of described voltage Uw
Gradually decay；
Referring to Fig. 7 (C)-Fig. 7 (E), 2 moment, described welding current Iw drops to threshold value, institute
The gate signal stating device for power switching Q1 and Q4 turns off, and now, described device for power switching Q4 exists
Under Zener diode effect between its gate pole and colelctor electrode, then burning voltage produces circuit and starts working,
Thus produce a stable high voltage (the voltage stabilizing value that Zener diode two ends produce) in circuit, from
And forcing described welding current Iw quickly to commutate, described threshold value is without special restriction, as long as making described
The size of the value of welding current Iw can ensure that the safety of described device for power switching is all right；
Referring to Fig. 7 (F), 3 moment, described welding current Iw commutation terminates, this welding current Iw
Value be described Iout, now, no longer have electric current to pass through described device for power switching Q4, thus power
Switching device Q4 enters and complete switches off state, and the current polarity of this full-bridge type secondary inverter circuit 100 becomes
The process of changing terminates, and welding current flows to be followed successively by: device for power switching Q2 → load electric arc Rarc → merit
Rate switching device Q3.
The reversal process of the follow-up welding current Iw again carried out is symmetrical with said process, at this not
Repeat again.
Referring to Fig. 8, fifth embodiment of the invention further provides for a kind of full-bridge type secondary inverter circuit
200, the circuit structure of this full-bridge type secondary inverter circuit 200 and described full-bridge type secondary inverter circuit 100
Structure essentially identical, difference is, described power switch circuit E1 be described burning voltage again produce
Circuit 10,20 or 30, and described power switch circuit E2 be described burning voltage again produce circuit 10,
20 or 30.
Referring to Fig. 9, sixth embodiment of the invention further provides for a kind of full-bridge type secondary inverter circuit
300, the circuit structure of this full-bridge type secondary inverter circuit 300 and described full-bridge type secondary inverter circuit 100
Structure essentially identical, difference is, described power switch circuit E1 be described burning voltage again produce
Circuit 10,20 or 30, and described power switch circuit E3 be described burning voltage again produce circuit 10,
20 or 30.
Referring to Figure 10, seventh embodiment of the invention further provides for a kind of full-bridge type secondary inverter circuit
400, the circuit structure of this full-bridge type secondary inverter circuit 400 and described full-bridge type secondary inverter circuit 100
Structure essentially identical, difference is, described power switch circuit E2 be described burning voltage again produce
Circuit 10,20 or 30, and described power switch circuit E4 be described burning voltage again produce circuit 10,
20 or 30.
Referring to Figure 11, eighth embodiment of the invention further provides for a kind of full-bridge type secondary inverter circuit
500, the circuit structure of this full-bridge type secondary inverter circuit 500 and described full-bridge type secondary inverter circuit 100
Structure essentially identical, difference is, described power switch circuit E1, E2, E3 and E4 are
Described burning voltage again produces circuit 10,20 or 30.
Referring to Figure 12, ninth embodiment of the invention further provides for described in a kind of use burning voltage again and produces
The semibridge system secondary inverter circuit 600 of raw circuit 10,20 or 30, this semibridge system secondary inverter circuit 600
The inversion half-bridge formed including power switch circuit H1 and power switch circuit H2.Wherein, described
Power switch circuit H1 and power switch circuit H2 be described in again burning voltage produce circuit 10,20
Or 30.
Further, described power switch circuit H1 includes that device for power switching Q1 ', described power open
Close circuit H2 and include device for power switching Q2 '.
The colelctor electrode of described device for power switching Q1 ' is as the first of this semibridge system secondary inverter circuit 600
The colelctor electrode of input, the emitting stage of described device for power switching Q1 ' and described device for power switching Q2 '
Connecting and act on electric arc as the first outfan, the emitter stage of described device for power switching Q2 ' is as this
Second input of semibridge system secondary inverter circuit 600, the first of this semibridge system secondary inverter circuit 600
Input is connected with the positive polarity output terminal of the secondary commutation circuit of front end, this semibridge system secondary inverter circuit
Second input of 600 is connected with the negative polarity outfan of the secondary commutation circuit of front end.Described power is opened
Close and bridge described first branch road, and described device for power switching between gate pole and the colelctor electrode of device Q1 '
Also described first branch road is bridged between gate pole and the colelctor electrode of Q2 '.Specifically, at described power switch electricity
In the H1 of road, the negative electrode of described Zener diode Zf is connected with the negative electrode of described fast recovery diode Df,
And the anode of described Zener diode Zf is connected with the gate pole of described device for power switching Q1 ', described soon
The anode of recovery diode Df is connected with the colelctor electrode of described device for power switching Q1 '.At described power
In on-off circuit H2, the negative electrode of described Zener diode Zf and the negative electrode of described fast recovery diode Df
Connect, and the anode of described Zener diode Zf be connected with the gate pole of described device for power switching Q2 ',
The anode of described fast recovery diode Df is connected with the colelctor electrode of described device for power switching Q2 '.
Described device for power switching Q1 ' and device for power switching Q2 ' can be with described device for power switching Q
Identical.Device for power switching Q1 ' described in the embodiment of the present invention is that described performance parameter is identical with Q2 '
IGBT switching tube.
Further, this semibridge system secondary inverter circuit 600 includes the first afterflow inductance L1 and second
Afterflow inductance L2, this first afterflow inductance L1 and the second afterflow inductance L2 composition coupling inductance, first
1 end of afterflow inductance L1 and 1 end of the second afterflow inductance L2 constitute Same Name of Ends, the first afterflow inductance
2 ends of L1 and 2 ends of the second afterflow inductance L2 constitute Same Name of Ends, 1 end of the first afterflow inductance L1
Being connected to the positive polarity output terminal of described secondary commutation circuit, 2 ends of the first afterflow inductance L1 are with described
The colelctor electrode of device for power switching Q1 ' connects.2 ends of described second afterflow inductance L2 are connected to described
The negative polarity outfan of secondary commutation circuit, 1 end of described second afterflow inductance L2 is connected to described merit
The emitter stage of rate switching device Q2 '.
Refer to Figure 12, after an inverter circuit output after reducing transformer T blood pressure lowering, be input to secondary whole
Current circuit, the output of secondary commutation circuit is followed by described semibridge system secondary inverter circuit 600.
Described reducing transformer T can be by the high-voltage square-wave alternating voltage of an inverter voltage output (as amplitude is
More than 500 volts) reduce to the square wave alternating voltage (as amplitude is about 65V) of low pressure.This reducing transformer T includes
Primary side winding and vice-side winding, described primary side winding is connected to the outfan of a described inverter circuit,
The two ends of described vice-side winding are respectively termination a and termination b, and this vice-side winding farther includes a center
Tap COM, this centre cap COM are as the second outfan and described semibridge system secondary inverting electricity
First outfan on road 600 acts on electric arc jointly.
Described secondary commutation circuit is constituted by recovering power diode D1, D2, D3 and D4 soon.Described
The negative electrode of fast power diode D1 and D2 of recovery connects defeated as the positive polarity of described secondary commutation circuit
Go out end, and be connected to the first input end of described semibridge system secondary inverter circuit 600.The embodiment of the present invention
In, the negative electrode of described fast recovery power diode D1 and D2 is connected to the 1 of described first afterflow inductance
End.The anode of described fast recovery power diode D3 and D4 connects as described secondary commutation circuit
Negative polarity outfan, and it is connected to the second input of described semibridge system secondary inverter circuit 600.This
In bright 9th embodiment, the anode of described fast recovery power diode D3 and D4 is connected to described
2 ends of the second afterflow inductance L2.In the equivalent circuit diagram (right figure) of the left figure of Figure 12, Lw be with
The cable stray inductance that the cable that source of welding current welding gun connects produces, Lm is magnetizing inductance.
Refer to Figure 13 to 14, the process of the current polarity conversion of this semibridge system secondary inverter circuit 600
As follows, wherein, Iw is welding current, and Im is exciting current, and PMW is the output of an inverter circuit
Signal:
Before 0 moment, described device for power switching Q1 ' turns on, and Q2 ' turns off, described welding current Iw
For described inverter current output electric current after Transformer Rectifier；
In 0 moment, one time inverter circuit quits work, and welding current Iw subtracts under the effect of arc voltage
Little；
In 1 moment, device for power switching Q2 ' turns on, and this semibridge system secondary inverter circuit 600 enters jointly
Conducting state, described welding current Iw gradually decays under described arc voltage effect；
In 2 moment, described welding current Iw drops to threshold value, and the gate signal of device for power switching Q1 ' is closed
Disconnected, under the now Q1 ' Zener diode effect between its gate pole, colelctor electrode, described burning voltage again
Generation circuit is started working, thus produces a stable arcing high pressure more in circuit, forces welding electricity
Stream commutation rapidly；To 3 moment, the electric current flowing through Q1 ' drops to zero, and Q1 ' complete switches off, welding electricity
Stream commutation process completes；
In 3 moment, a described inverter circuit restarts work, and welding current Iw is reverse in output
Rising, reach setting value to 4 moment, the most complete commutation course terminates.
When exporting welding current Iw reverse again, its process is symmetrical with said process, the most superfluous
State.
Referring to Figure 15, tenth embodiment of the invention further provides for a kind of variable polarity welding power supply 700,
This variable polarity welding power supply 700 includes: 720, inverter circuit 740 of line voltage current rectifying and wave filtering circuit,
Reduction voltage circuit 760, secondary commutation filter circuit 780 and secondary inverter circuit 790.Described voltage electricity
Pressure current rectifying and wave filtering circuit 720 is input to institute to after three-phase power grid voltage (380V/50Hz) rectified filtering
State and an inverter circuit 740 carries out an inversion, then by the output signal of an inversion through described
After reduction voltage circuit 760 blood pressure lowering, it is input to described secondary commutation filter circuit 780 and carries out rectifying and wave-filtering, so
After be input in secondary inverter circuit 790 to carry out secondary inverting after export Variable Polarity alternating current.
Described reduction voltage circuit 760 can be that high frequency voltage descending circuit can also intermediate frequency reduction voltage circuit.The present invention is real
Executing in example, described reduction voltage circuit 760 is intermediate frequency reduction voltage circuit.
Described secondary inverter circuit 790 can be described full-bridge type secondary inverter circuit or semibridge system secondary inverse
One in power transformation road.Wherein, described full-bridge type secondary inverter circuit can be described full-bridge type secondary inverting
Circuit 100,200,300,400 or 500.Described semibridge system secondary inverter circuit can be described half-bridge
Formula secondary inverter circuit 600.
The secondary inverter circuit burning voltage again of the variable polarity welding power supply that the embodiment of the present invention provides produces
Circuit by bridge between the gate pole and colelctor electrode of device for power switching the fast recovery diode connected and
Zener diode, thus when variable polarity welding, the process converted at current polarity due to Zener diode
The burning voltage of middle generation can force the quick zero passage of welding current to commutate, it is hereby achieved that stable again
Burning voltage, with the stable burning of pilot arc, this secondary inverter circuit burning voltage again produces circuit should
Without complicated control when variable polarity welding power supply, it is also possible to overcome the existing secondary inverting of arcing again electricity
In road, parallel passive buffer network is to initial current, the problem of circuit parasitic parameter sensitivity.
It addition, those skilled in the art also can do other changes in spirit of the present invention, certainly, these depend on
The change done according to present invention spirit, within all should being included in scope of the present invention.
Claims (15)
1. the secondary inverting of variable polarity welding power supply burning voltage again produces circuit, it is characterised in that including:
One device for power switching, described device for power switching has a gate pole, colelctor electrode and emitter stage；And
One first branch road, described first branch road includes Zener diode and fast recovery diode, described voltage stabilizing two
Pole pipe has a negative electrode and anode, and described fast recovery diode has a negative electrode and anode, described voltage stabilizing two
The negative electrode of pole pipe and the negative electrode of described fast recovery diode connect, and the anode of described Zener diode is with described
The gate pole of device for power switching connects, the anode of described fast recovery diode and described device for power switching
Colelctor electrode connects, described Zener diode during converting at current polarity at described colelctor electrode and
The commutation of stable voltage forces current quick zero passage is produced, it is thus achieved that stable arcing again between described emitting stage
Voltage.
2. the secondary inverting burning voltage again of variable polarity welding power supply as claimed in claim 1 produces circuit, its
Be characterised by, farther include a RC buffer network, described RC buffer network include buffer resistance and
The buffering electric capacity connected with this buffer resistance, this RC buffer network is connected across the door of described device for power switching
Between pole and colelctor electrode, or, this RC buffer network be connected across the colelctor electrode of described device for power switching with
Between emitter stage.
3. the secondary inverting of the variable polarity welding power supply as according to any one of claim 1 to 2 burning voltage again
Produce circuit, it is characterised in that described device for power switching is IGBT switching tube.
4. a full-bridge type secondary inverter circuit for variable polarity welding power supply, including four power switch circuit E1,
The inversion full-bridge of E2, E3 and E4 composition, wherein, described power switch circuit E1 Yu E4 simultaneously turn on,
Simultaneously turning off, described power switch circuit E2 with E3 simultaneously turns on, simultaneously turns off, it is characterised in that institute
Stating at least one circuit in power switch circuit E1 and E4 is in claim 1 to 2 described in any one
Secondary inverting burning voltage again produce at least one in circuit, and described power switch circuit E2 and E3
Circuit is the secondary inverting burning voltage again generation circuit in claim 1 to 2 described in any one.
5. the full-bridge type secondary inverter circuit of variable polarity welding power supply as claimed in claim 4, its feature exists
In, described power switch circuit E1 includes device for power switching Q1, described power switch circuit E2 bag
Include device for power switching Q2, described power switch circuit E3 and include device for power switching Q3, described merit
Rate on-off circuit E4 includes device for power switching Q4, the emitter stage of described device for power switching Q1 and merit
The colelctor electrode of rate switching device Q3 connects and as the first outfan, described device for power switching Q2's
Emitter stage is connected with the colelctor electrode of device for power switching Q4 and as the second outfan, described power switch
The colelctor electrode of device Q1 is connected with the colelctor electrode of device for power switching Q2 and as first input end, institute
The emitter stage of the emitter stage and device for power switching Q4 of stating device for power switching Q3 is connected and as second
Input, described first input end and the second input are connected with the secondary commutation filter circuit of front end, institute
State the first outfan and the second outfan acts on electric arc.
6. the full-bridge type secondary inverter circuit of variable polarity welding power supply as claimed in claim 4, its feature exists
In, described power switch circuit E3 and power switch circuit E4 is that described burning voltage again produces circuit.
7. the full-bridge type secondary inverter circuit of variable polarity welding power supply as claimed in claim 4, its feature exists
In, described power switch circuit E1 and power switch circuit E2 is that described burning voltage again produces circuit.
8. the full-bridge type secondary inverter circuit of variable polarity welding power supply as claimed in claim 4, its feature exists
In, described power switch circuit E1 and power switch circuit E3 is that described burning voltage again produces circuit.
9. the full-bridge type secondary inverter circuit of variable polarity welding power supply as claimed in claim 4, its feature exists
In, described power switch circuit E2 and power switch circuit E4 is that described burning voltage again produces circuit.
10. the full-bridge type secondary inverter circuit of variable polarity welding power supply as claimed in claim 4, its feature exists
In, described power switch circuit E1, E2, E3 and E4 be described in again burning voltage produce circuit.
The semibridge system secondary inverter circuit of 11. 1 kinds of variable polarity welding power supplies, including power switch circuit H1 with
And power switch circuit H2 composition inversion half-bridge, it is characterised in that this power switch circuit H1 and
Power switch circuit H2 is the burning voltage again according to any one of described claim 1 to 2 and produces
Circuit.
The semibridge system secondary inverter circuit of 12. variable polarity welding power supplies as claimed in claim 11, its feature exists
In, described power switch circuit H1 includes device for power switching Q1 ', described power switch circuit H2
Including device for power switching Q2 ', the colelctor electrode of described device for power switching Q1 ' is as this semibridge system secondary
The first input end of inverter circuit, the emitting stage of described device for power switching Q1 ' and described power switch device
The colelctor electrode of part Q2 ' connects and acts on electric arc, described device for power switching Q2 ' as the first outfan
Emitter stage as the second input of this semibridge system secondary inverter circuit, this semibridge system secondary inverter circuit
First input end be connected with the positive polarity output terminal of the secondary commutation circuit of front end, this semibridge system secondary is inverse
Second input on power transformation road is connected with the negative polarity outfan of the secondary commutation circuit of front end.
The semibridge system secondary inverter circuit of 13. variable polarity welding power supplies as claimed in claim 12, its feature exists
In, this semibridge system secondary inverter circuit farther includes the first afterflow inductance L1 and the second afterflow inductance
L2, this first afterflow inductance L1 and the second afterflow inductance L2 constitute coupling inductance, the first afterflow inductance
1 end of L1 and 1 end of the second afterflow inductance L2 constitute Same Name of Ends, 2 ends of the first afterflow inductance L1
Constituting Same Name of Ends with 2 ends of the second afterflow inductance L2,1 end of the first afterflow inductance L1 is connected to described
The positive polarity output terminal of secondary commutation circuit, 2 ends of the first afterflow inductance L1 and described power switch device
The colelctor electrode of part Q1 ' connects, and 2 ends of described second afterflow inductance L2 are connected to described secondary commutation electricity
The negative polarity outfan on road, 1 end of described second afterflow inductance L2 is connected to described device for power switching
The emitter stage of Q2 '.
14. 1 kinds of variable polarity welding power supplies, including: line voltage current rectifying and wave filtering circuit, inverter circuit,
Reduction voltage circuit, secondary commutation filter circuit and secondary inverter circuit, it is characterised in that described secondary is inverse
Power transformation road includes that the burning voltage again as described in any one in claim 1 to 2 produces circuit.
15. variable polarity welding power supplies as claimed in claim 14, it is characterised in that described secondary inverter circuit
For full-bridge type secondary inverter circuit or semibridge system secondary inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410058872.3A CN103856092B (en) | 2014-02-21 | 2014-02-21 | The secondary inverting of variable polarity welding power supply burning voltage again produces circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410058872.3A CN103856092B (en) | 2014-02-21 | 2014-02-21 | The secondary inverting of variable polarity welding power supply burning voltage again produces circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103856092A CN103856092A (en) | 2014-06-11 |
| CN103856092B true CN103856092B (en) | 2016-09-21 |
Family
ID=50863383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410058872.3A Expired - Fee Related CN103856092B (en) | 2014-02-21 | 2014-02-21 | The secondary inverting of variable polarity welding power supply burning voltage again produces circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103856092B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016222001A1 (en) * | 2016-11-09 | 2018-05-09 | Vincotech Gmbh | ACTIVE THREE-LEVEL NPC MOVEMENT MODULE |
| CN107052522B (en) * | 2017-02-28 | 2019-10-08 | 上海广为焊接设备有限公司 | Arc static circuit and its working method for AC-DC argon arc welding machine |
| CN111001897B (en) * | 2020-03-09 | 2020-07-07 | 杭州凯尔达电焊机有限公司 | Welding auxiliary circuit and welding power supply |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2232986Y (en) * | 1994-07-07 | 1996-08-14 | 张远湖 | Accumulating automobile electronic igniter |
| US5615094A (en) * | 1995-05-26 | 1997-03-25 | Power Conversion Products, Inc. | Non-dissipative snubber circuit for a switched mode power supply |
| CN2824424Y (en) * | 2005-08-31 | 2006-10-04 | 北京伏安电气公司 | Multi-output terminal power for power supply of current transformer |
| CN201119052Y (en) * | 2007-09-25 | 2008-09-17 | 王其林 | A LED power and current constant source integrated circuit board |
| CN101352776A (en) * | 2008-09-18 | 2009-01-28 | 清华大学 | Variable polarity welding power supply secondary inverter circuit and control method thereof |
| CN102780384A (en) * | 2012-08-22 | 2012-11-14 | 成都中大华瑞科技有限公司 | High-performance low-cost IGBT (Insulated Gate Bipolar Translator) negative pressure bootstrap drive circuit |
| CN203027132U (en) * | 2012-12-07 | 2013-06-26 | 天水七四九电子有限公司 | Multifunctional pre-stage start control circuit of switching power supply |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4037348C1 (en) * | 1990-11-20 | 1992-02-13 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De | Protective circuitry for power semiconductor switches - uses bridging voltage clamping circuit consisting of diode and Zener diode belonging to rectifier pair |
| CN101478143B (en) * | 2008-12-19 | 2011-05-11 | 中国电力科学研究院 | Active protective circuit for protecting series operation of semi-conductor device |
| CN203426573U (en) * | 2013-08-28 | 2014-02-12 | 上海熔易焊接机制造有限公司 | Main loop of inverter pulse variable polarity TIG welding power source |
-
2014
- 2014-02-21 CN CN201410058872.3A patent/CN103856092B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2232986Y (en) * | 1994-07-07 | 1996-08-14 | 张远湖 | Accumulating automobile electronic igniter |
| US5615094A (en) * | 1995-05-26 | 1997-03-25 | Power Conversion Products, Inc. | Non-dissipative snubber circuit for a switched mode power supply |
| CN2824424Y (en) * | 2005-08-31 | 2006-10-04 | 北京伏安电气公司 | Multi-output terminal power for power supply of current transformer |
| CN201119052Y (en) * | 2007-09-25 | 2008-09-17 | 王其林 | A LED power and current constant source integrated circuit board |
| CN101352776A (en) * | 2008-09-18 | 2009-01-28 | 清华大学 | Variable polarity welding power supply secondary inverter circuit and control method thereof |
| CN102780384A (en) * | 2012-08-22 | 2012-11-14 | 成都中大华瑞科技有限公司 | High-performance low-cost IGBT (Insulated Gate Bipolar Translator) negative pressure bootstrap drive circuit |
| CN203027132U (en) * | 2012-12-07 | 2013-06-26 | 天水七四九电子有限公司 | Multifunctional pre-stage start control circuit of switching power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103856092A (en) | 2014-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109861546B (en) | Power electronic transformer with true bipolar direct current output capability and application control | |
| CN107745174B (en) | Digital variable-polarity welding power supply based on SiC IGBT | |
| CN104734547B (en) | A kind of boosting unit Z-source inverter | |
| CN100460122C (en) | Super speed inverting pole-changing square wave current arc-welding power supply device | |
| CN202818134U (en) | PSM high-voltage power supply | |
| WO2021238140A1 (en) | Double-ended output charging circuit and auxiliary circuit switch control method therefor | |
| CN104965136A (en) | Three-level converter power unit double pulse test method | |
| CN103856092B (en) | The secondary inverting of variable polarity welding power supply burning voltage again produces circuit | |
| CN102624246A (en) | Single-ended forward parallel push-pull type high-power converter | |
| CN103401468B (en) | A kind of plasma arc striking circuit | |
| CN101856769A (en) | Plasma arc cutting and welding power supply | |
| CN202550893U (en) | Single-ended forward parallel push-pull type large-power converter | |
| CN202940733U (en) | Direct current insulation buck converter and matrix voltage detection circuit thereof | |
| CN103427621A (en) | Mining isolation type intrinsic safety LED driving power source | |
| CN207508489U (en) | Digitlization variable polarity welding power supply based on SiC IGBT | |
| CN104057181A (en) | Open-phase protection circuit for inverter welding machine | |
| CN105048820B (en) | A kind of motor driver of integrated straight convertor used for electric vehicle | |
| CN208078917U (en) | A kind of high-voltage power device | |
| CN106451428A (en) | Hybrid type unified power quality conditioner with short circuiting current limiting function | |
| CN203679496U (en) | Dual-voltage automatic switching circuit | |
| CN103182596B (en) | Adaptive variable polarity plasma arc welding power supply | |
| CN109570698A (en) | A kind of inversion multifunctional welding machine output circuit and its control method | |
| CN104300822A (en) | Method for controlling single-phase non-isolated photovoltaic inverter with follow current clamping switch | |
| CN103683862B (en) | Thyristor gating circuit for converter three-phase input rectification circuit | |
| CN207968315U (en) | The IGBT drive circuit of frequency converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 Termination date: 20170221 |