CN208713102U - The adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase - Google Patents
The adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase Download PDFInfo
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Abstract
The utility model discloses a kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply systems of low-and high-frequency impulse phase, the power-supply system includes STM32 human-computer interface module, host power supply and from electromechanical source, the STM32 human-computer interface module is connect with host power supply and from the DSP digital coordination control module in electromechanical source respectively by CAN bus, host power supply provides electric current for preceding silk, provides electric current from electromechanical source for rear silk；It host power supply and is made of respectively two main circuits in parallel and control circuit from electromechanical source, the power-supply system can realize 7 kinds of low-and high-frequency impulse phase modes, high-power twin arc, mariages molten drop are acted on by slave two-way low frequency modulations type dipulse and molten bath is caused to be resonated, optimize the temperature gradient of temperature field of molten pool and reduce twin arc interference, to improve welding process stability, optimization seam organization and improve quality of weld seam molding.
Description
Technical field
The utility model relates to efficient welding technology field, in particular to high-power mariages pulse MIC welding technical field,
More particularly to a kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase.
Background technique
As the important support point of welding technique innovation, high efficiency welding improves deposition effect when being mainly reflected in welding slab
Rate improves quality of weld joint.Realize efficient welding, key is further increasing for welding current.High-power mariages arteries and veins
One of the major way that MIG weldering is efficient welding is rushed, has clear advantage, welding electricity than traditional mariages pulse MIC welding
The high current (pulse peak current is greater than 630A) of source output acts on welding wire, and principal and subordinate's electric arc burns in the same molten bath,
The molten drop that two electric arcs generate project transfers keeps molten bath wide and deep, can significantly improve welding efficiency.But high-power mariages pulse MIC
Weldering uses High-current output, and magnetic field strength caused by electric current increases, so that twin arc interaction force increases, causes serious
Twin arc interference；High-power mariages pulse MIC welding is big to the heat input of material, therefore causes weld metal zone and heat affected area crystal grain thick
Greatly, the toughness of material is seriously reduced, is heat-treated after some structure weldings, its application is restricted.
High-power mariages pulse MIC welding has broad application prospects in terms of big thick plates, especially one-pass molding
Efficient high-speed welding, for improve mariages pulse MIC welding welding production efficiency open new approach.But high-power mariages arteries and veins
MIG is rushed to weld due to being closer between mariages, if the electric current rule in conventional Double Wire Welding is applied to high current double wire welding,
Only increase the two-way pulse current of Double Wire Welding, it will be so that twin arc interaction force increases, so as to cause twin arc interference
Seriously, and the bigger interference of power is more serious, and the stability of electric arc is poorer than conventional 630A or less mariages pulse MIC welding, even
Also poorer than monofilament pulse MIC welding, twin arc intermittence current interruption occurs often, causes welding process unstable, cannot achieve ideal
Efficient high-speed welding process.The arc behavior for interfering with each other, interacting between the pulse high current twin arc of short distance
The stability and welding quality of electric arc, droplet transfer and welding process are directly influenced with the droplet transfer.Twin arc interferes shadow
Ringing welding quality becomes the main bottleneck for restricting its popularization and application.
It can be seen that existing high-power mariages pulse MIC welding technology, mainly there is the shortcomings that the following aspects:
(1) high-power mariages pulse MIC welding is big to the heat input of material, causes weld metal zone and heat affected area coarse grains,
The toughness of material is seriously reduced, is heat-treated after some structure weldings, its application is restricted.
(2) high-power mariages pulse MIC welding between mariages due to being closer, if the electric current in conventional Double Wire Welding advised
Rule is applied to high current double wire welding, i.e., only increases the two-way pulse current of Double Wire Welding merely, then magnetic caused by electric current
Field will increase accordingly, so that twin arc interaction force increases, serious twin arc be caused to interfere, disturbed condition increases with power
And further increase, the current interruption of twin arc intermittence occurs often, causes welding process unstable, cannot achieve ideal high efficiency
Welding process, welding effect are poorer or even also poorer than monofilament pulse MIC welding than conventional 630A or less mariages pulse MIC welding, can not
The advantages of embodying high-power double wire welding.
The mature mariages Pulse MIG Welding Power Source power used is also smaller on the market at present, be substantially all in 630A hereinafter,
Especially domestic, the high-power mariages pulse MIC welding development of 1000A rank is not also especially mature；In addition, working as source of welding current function
Rate becomes greatly, and the interference problem during Double Wire Welding between twin arc is also more and more serious, and which has limited mariages pulse MICs
Weldering welding current further increases.
The stability of electric arc is to realize the premise of welding process stability, and the stability of electric arc depends on each in twin arc
The suffered size disturbed of electric arc and each electric arc itself are able to bear the ability of disturbance.High-power mariages pulse MIC welding, due to double
Arc current is larger, then the mutual attractive force between twin arc can be larger, and the interference between twin arc can become more serious.
It is to improve electric arc itself to bear the ability of disturbance and improve twin arc phase interaction that twin arc interference optimization, which controls comparatively ideal thought,
Distribution firmly makes the mutual attractive force of twin arc reach minimum；The stability of electric arc is welding condition optimal control
Premise.
Wave control technology plays an important role in optimization electric arc and in terms of the droplet transfer.If mutual for twin arc
Formation mechenism is interfered, corresponding wave control technology is taken, it is likely that reaches and reduces high-power twin arc interference, reach raising
The purpose of welding process stability.Dipulse low frequency modulations are one of the modes of waveform control, are in high frequency single pulse waveforms
On the basis of be modulated again, two kinds of single pulse waveforms are generated one kind of periodically strong and weak pulse current waveform by certain rule
New process.Dipulse slave output electric current has 10 adjustable parameters: flash background current I respectivelyb1, flash peak value
Electric current Ip1, flash base value time Tb1With flash time to peak Tp1；Weak pulse rushes background current Ib2, weak pulse peak current
Ip2, weak pulse rush base value time Tb2Time to peak T is rushed with weak pulsep2；Flash group's current time TsWith weak impulse train current time Tw,
Dipulse has better adjustability for from technique.
Low current value or the small high-frequency impulse group of duty ratio are modulated into the weak pulse punching of low-frequency pulse, high current value or duty
Than the flash that big high-frequency impulse group is modulated into low-frequency pulse, the periodicity of several high frequencies flash group constitutes low frequency arteries and veins
Flash group's current time T of punchings, when the periodicity of the weak impulse train of several high frequencies constitutes the weak impulse train electric current of low-frequency pulse
Between Tw；The periodicity of high frequency power impulse train determines the duty ratio of low-frequency pulse.Low frequency modulations method can be by high-frequency impulse
N-fold lower (the sum of the periodicity that n is equal to high frequency power impulse train), control high frequency flash group periodicity and high frequency weak pulse drop in frequency
Rush group's periodicity ratio can output low frequency pulse duty factor arbitrary value.Pass through the pulse ginseng of two groups of high-frequency impulses of modulation
Number makes pulse strength by preset Frequency and periodically switches, so that periodically variable strong and weak pulse is obtained, while
The electric arc and heat input for making pulse MIC welding change with low frequency modulations frequency and are changed.The stirring action of dual-pulse welding pool
Obviously, dipulse can eliminate weld metal zone columnar dendrite, and gained weld grain is more tiny than single impulse welding seam crystal particle；Dual-pulse
The stirring in molten bath causes molten bath resonance to interrupt continuously growing up for crystal grain, so that primary crystallization is formed by crystallite dimension change
It is small, have the effect of refining crystal grain, to improve quality of weld seam molding.
It is domestic about the welding of monofilament pulse, the welding of monofilament low frequency modulations type dipulse and the welding of mariages pulse at present
Have more research outside, it is high-power about the research ground zero of high-power mariages pulse MIC welding low frequency modulations type dipulse welding
Mariages pulse MIC welding low frequency modulations type dipulse solder bond high-power mariages pulse MIC welding high efficiency and low frequency modulations type
The advantages of dipulse high quality of weld seam molding.But high-power mariages pulse MIC welding low frequency modulations type dipulse welding at present is ground
Study carefully the adjusting of mainly high-frequency impulse phase, and the research that low-frequency pulse phase is adjusted still belongs to blank.Such as existing skill
In art documents and materials " process characteristic of low frequency modulations type pulse MIC welding method " (Tong Hongjun, intelligence of going up a hill welding,
2001.11), although the welding method can obtain beautiful fish scale-shaped face of weld, expand the range of solderable play movement, effectively
Inhibit the generation of weld blowhole defect, refine crystal grain, reduce crack sensitivity, but is limited only to the list that peak point current is less than 630A
Silk pulse MIC welding is not mariages pulse MIC welding, and output power is much smaller than high-power mariages arteries and veins applied by the utility model
MIG weldering is rushed, can not achieve efficient welding.It is separately found through retrieval, Chinese Patent Application No. are as follows: 201510713907.7, title
Are as follows: high-power mariages pulse MIC welding low frequency modulations type dual-pulse power supply system, this application are controlled using DSP digital coordination
ECAN module built in module realizes the digital coordination control between slave, thus realize it is synchronous, alternately and it is random three kinds it is low
Frequency modulation type dipulse phase output.But the power-supply system is to be directed to three kinds of phases of high-frequency impulse and design, system work
When slave be to export flash and weak pulse punching simultaneously, low frequency phase and high-frequency phase cannot be separately adjustable simultaneously.
Utility model content
The purpose of the utility model is to overcome the disadvantages existing in the prior art and deficiency, provides a kind of low-and high-frequency pulse
The high-power mariages synergic-pulsed MIG welding power-supply system of phase-adjustable.
The utility model acts on high-power mariages by the low-and high-frequency modulation type dipulse of different low-and high-frequency impulse phases
Pulse MIC welding process optimizes the electricity between high-power twin arc to adjust the field strength and distribution situation of twin arc current field
The interaction situation of magnetic force reduces high-power twin arc and interferes with each other, enhances the controllability of droplet transfer, by changing mariages
The output phase relationship of electric current enhances melting bath stirring, reduces the occurrence probability of gas hole defect, while optimizing heat input, refinement weldering
Area and heat affected area crystal grain are stitched, beautiful scalelike mark weld seam is obtained, to improve welding efficiency and welding process stability, optimization
Seam organization and raising quality of weld seam molding.
The purpose of this utility model is achieved through the following technical solutions:
A kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase, including the man-machine boundary STM32
Face mould block, the STM32 human-computer interface module are connected by the DSP digital coordination control module in CAN bus and host power supply
It connects, the host power supply provides electric current for main machine arc load, and the STM32 human-computer interface module passes through CAN bus and slave
DSP digital coordination control module connection in power supply, it is described to provide electric current from electromechanical source for slave arc load；
It the host power supply and is composed in parallel respectively by two main circuits from electromechanical source, the host power supply and from electromechanical source
Main circuit one end connect with three-phase alternating current, connect after the other end is in parallel with arc load, the main circuit includes input rectifying
Filter module, high-frequency inversion module, power voltage changing module and output rectification filter module；
The topological structure of the main circuit can be according to practical condition, to be selected as hard switching, phase shifting full bridge soft is opened
It closes or LLC resonance software switch topology is one of；
The control circuit include DSP digital coordination control module, high-frequency drive module, measure voltage & and
Failure protection module；
One end of the high-frequency drive module is connect with one end of high-frequency inversion module, the other end and DSP digital coordination
The end PWM of control module connects；
One end of the measure voltage & is connect with arc load, and the other end and DSP digital coordination control mould
The A/D input terminal of block connects；
One end of the failure protection module is connect with one end of input rectifying filter module, and the other end and DSP are digitized
One end of Collaborative Control module connects；
The STM32 human-computer interface module and DSP digital coordination control module are connected with each other.
Preferably, eCAN module is real built in the STM32 human-computer interface module and the DSP digital coordination control module
Digital coordination control between existing upper computer and lower computer, to realize the low-and high-frequency dipulse phase output of 7 kinds of modes.
Preferably, the DSP digital coordination control module is specially TMS320F28335.
Preferably, the built-in ePWM output module for generating pwm signal of the DSP digital coordination control module.
Preferably, the power-supply system, which adjusts low-and high-frequency impulse phase, can be obtained 7 kinds of operating modes, and be respectively: low frequency is same
Walk high-frequency synchronous phase pattern, low frequency synchronisation high frequency alternating phase mode, low frequency synchronisation high frequency random phase mode, low frequency alternating
High-frequency synchronous phase pattern, low frequency replace high frequency alternating phase mode, and low frequency replaces high frequency random phase mode, and low frequency is high at random
Frequency random phase mode.
The power-supply system work is in low frequency synchronisation high-frequency synchronous phase pattern, slave output off current HIGH low-frequency pulse
Phase is identical, i.e. low-and high-frequency pulse phase difference φh=φl=0 °, and slave low-and high-frequency pulse frequency difference is equal；Phase herein
Under bit pattern, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, i.e., when host low-frequency pulse is in the flash stage from
Machine low-frequency pulse is in the flash stage, otherwise slave low-frequency pulse is in weak when host low-frequency pulse is in weak stage pulse
Stage pulse；The peak base value of slave high-frequency impulse is synchronous to be occurred, i.e., when host high-frequency impulse is in peak phase, slave is high
Frequency pulse is in peak phase, otherwise slave high-frequency impulse is in the base value stage when host high-frequency impulse is in the base value stage；
Low frequency synchronisation phase keeps the temperature gradient of temperature field of molten pool larger, and high-frequency synchronous phase then makes twin arc annoyance level than alternately phase
Position base value electric arc interference is small, and the interference of peak value electric arc is big.
In low frequency synchronisation high frequency alternating phase mode, slave exports electric current low-frequency pulse phase for the power-supply system work
Position is identical, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low frequency
Pulse frequency is equal；But slave high-frequency impulse phase alternation, i.e. high-frequency impulse phase differenceh=180 °, slave high frequency
The peak base value of pulse is alternately present, i.e., the output of slave high-frequency impulse is prolonged than the output of host high-frequency impulse in a high-frequency impulse group
Slow half of high-frequency impulse period, and slave high-frequency impulse frequency is equal；Low frequency synchronisation phase makes the temperature difference ladder of temperature field of molten pool
Spend it is larger, high frequency alternating phase then make twin arc annoyance level than locking phase peak value electric arc interfere it is few, and base value electric arc interference
It is larger.
In low frequency synchronisation high frequency random phase mode, slave exports electric current low-frequency pulse phase for the power-supply system work
Position is identical, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low frequency
Pulse frequency is equal；But slave high-frequency impulse phase is random, the peak base value of slave high-frequency impulse occurs at random, that is, exists
The output of slave high-frequency impulse is random with host high-frequency impulse output phase in one high-frequency impulse group, and slave high-frequency impulse may
Base value or peak value are exported simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；Low frequency is same
Step phase keeps the temperature gradient of temperature field of molten pool larger, and high frequency random phase then makes peak value electric arc and base value electric arc annoyance level exist
Between high-frequency synchronous and alternating phase.
When low frequency replaces high-frequency synchronous phase pattern, the output of slave low frequency pulse current is than master for the power-supply system work
Machine low-frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel
=180 °, high-frequency impulse Phase synchronization, i.e. high-frequency impulse phase differenceh=0 °, under this phase pattern, slave
The strong and weak pulse of low-frequency pulse is alternately present, i.e., when host low-frequency pulse is in the flash stage, slave low-frequency pulse is in weak
Stage pulse, on the contrary when host low-frequency pulse is in weak stage pulse, slave low-frequency pulse is in flash stage, and principal and subordinate
Machine low-frequency pulse frequency is equal；But the peak base value of slave high-frequency impulse is synchronous to be occurred, and slave high-frequency impulse frequency phase
Deng；Low frequency alternating phase keeps the temperature gradient of temperature field of molten pool smaller, and high-frequency synchronous phase then makes twin arc annoyance level than handing over
It is small for the interference of phase base value electric arc, and the interference of peak value electric arc is larger.
The power-supply system work is when low frequency replaces high frequency alternating phase mode, the output of slave low-and high-frequency pulse current
Half of low-and high-frequency pulse period of delay, i.e. low-and high-frequency pulse phase difference φ are exported than host low-and high-frequency pulse respectivelyh=φl=
180 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, the peak base value arteries and veins of slave high-frequency impulse
Punching is also alternately present, and slave low-and high-frequency pulse frequency difference is equal；Low frequency alternating phase make the temperature gradient in temperature field compared with
Small, it is few that high frequency alternating phase interferes twin arc annoyance level than locking phase mode peak value electric arc, and base value electric arc interferes
It is larger.
When low frequency replaces high frequency random phase mode, the output of slave low frequency pulse current is than master for the power-supply system work
Machine low-frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel
=180 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, and slave low frequency arteries and veins
It is equal to rush frequency；But slave high-frequency impulse may export base value or peak value simultaneously, it is also possible to which base value and peak value replace shape
State, and slave high-frequency impulse phase is random；Low frequency alternating phase keeps the temperature gradient of temperature field of molten pool smaller, the random phase of high frequency
Position then makes peak value electric arc and base value electric arc annoyance level between high-frequency synchronous and alternating phase.
The power-supply system work is in low frequency random high frequency random phase mode, the pulse electricity of slave in welding process
Stream output is irrelevant, is all respectively to give independently of each other, between the two not stringent phase relation, slave low frequency arteries and veins
Punching may export simultaneously flash or weak pulse punching, it is also possible to strong and weak pulse alternating state, and slave low-frequency pulse phase with
Machine；Slave high-frequency impulse may export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave is high
Frequency impulse phase is random；Low frequency random phase make the temperature gradient of temperature field of molten pool between low frequency synchronisation phase and alternating phase it
Between, high frequency random phase then makes twin arc annoyance level between high-frequency synchronous and alternating phase.
Preferably, DSP digital coordination control module is defeated in ePWM by closed loop control algorithm generation control signal function
Module out changes PWM duty cycle by dynamic if main circuit uses hard switching to control the IGBT on-off of main circuit to protect
Hold voltage pulse output or electric current；Main electricity is controlled by dynamic regulation PWM phase shifting angle if main circuit is using phase-shifting full-bridge
The IGBT on-off on road is to keep voltage pulse output or electric current；Pass through dynamic if main circuit is using LLC resonance and changes PFM frequency
Rate controls the MOSFET on-off of main circuit to keep voltage pulse output or electric current.
Preferably, when DSP digital coordination control module controls pulse current and pulse of the low-frequency pulse to high-frequency impulse
Between carry out periodical switching, obtain periodically variable two-way power impulse train, high-power twin arc is periodically variable two
Weld pool surface is acted on rigid electric arc under the effect of road power impulse train, stirring action is generated to molten bath.Stirring action can be eliminated
Weld metal zone columnar dendrite, gained weld grain are more tiny than single impulse welding seam crystal particle；The stirring in dual-pulse molten bath causes to melt
Pond resonance interrupts continuously growing up for crystal grain, becomes smaller so that primary crystallization be made to be formed by crystallite dimension, has the effect of refinement crystal grain
Fruit, to improve quality of weld seam molding.
Preferably, mariages molten drop is transitioned into molten bath under the effect of low frequency modulations type dipulse in the form of project transfer, melts
Drop carries a large amount of thermal energy and kinetic energy impact molten bath, generates intense impact effect to molten bath, makees to generate stirring to molten bath
With the frequency of the STM32 human-computer interface module modulation low frequency modulations type dipulse keeps its frequency range and molten bath itself intrinsic
Frequency range it is close, so that molten bath is generated resonance.
Preferably, the controlling party of the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of a kind of low-and high-frequency impulse phase
Method includes the following steps:
DSP digital coordination control module by initialization and with STM32 human-computer interface module verifying communicate after into
Machine state；
DSP digital coordination control module judges the disconnected conjunction of arc welding gun switch, if arc welding gun switch is closed, host in the standby state
Striking signal is sent to slave, then slave enters the striking stage, while slave constantly loops to determine respective size of current,
If electric current reaches certain threshold value, master is realized according to the low-and high-frequency impulse phase mode that STM32 human-computer interface module is set respectively
The timing control of the low frequency flash of slave and the switching of weak impulsive switched and high-frequency impulse peak value and base value, while basis
The given double-pulse parameters of STM32 human-computer interface module realize the current constant control of slave output electric current.
At the same time, the state of the continuous cycle detection arc welding gun switch of DSP digital coordination control module, once arc welding gun switch
It disconnects, slave, which enters, after host sends receipts arc signal to slave receives the arc stage, and after the completion of slave receives arc, power-supply system is completed
Welding process, slave enter standby mode.In the standby state, DSP digital coordination control module constantly detects weldering
Rifle switch then starts new round welding process once detecting that arc welding gun switch is closed.
The utility model compared with the existing technology have following advantages and effects
(1) welding efficiency is high.Traditional Double Wire Welding already has biggish promotion, high-power mariages pulse compared to monofilament weldering efficiency
MIG weldering is due to using thick welding wire (1.6 or more diameter) to generate under high current (monofilament peak point current 630A or more) heat effect
Molten drop amount is big, and molten bath is wide and deep, can fill up the groove of big slab weldment quickly, and high-power twin arc fires on a molten bath jointly
It burns, total heat input is much larger than traditional monofilament electric current in 630A Double Wire Welding heat input below, it is easy to accomplish one-pass molding weldering
Connect, and traditional Double Wire Welding generally require it is several can just fill up big thick plates groove to tens, layer weld seam, therefore can mention significantly
High speed of welding and deposition efficiency.
(2) temperature gradient for optimizing temperature field of molten pool, in addition greatly reduces high-power twin arc and interferes with each other.It can pass through
Different low-and high-frequency impulse phase modes are selected to adjust the temperature gradient of temperature field of molten pool；High-power mariages pulse MIC welding by
It is closer between mariages, it is if the electric current rule in conventional Double Wire Welding is applied to high current double wire welding, i.e., only single
The pure two-way pulse current for increasing Double Wire Welding, then magnetic field caused by electric current will increase accordingly, so that twin arc interacts
Power increases, and serious twin arc is caused to interfere, and disturbed condition increases with power and further increased, when twin arc intermittence current interruption
Often occur, cause welding process unstable, cannot achieve ideal efficient welding process, welding effect than conventional 630A with
The advantages of lower mariages pulse MIC welding is poor, or even more worse than single arc welding, can not embody mariages high power welding.This is practical new
Type changes the field strength and distribution situation of twin arc current field by the adjusting of low-and high-frequency impulse phase, optimizes high-power twin arc
Between electromagnetic force interaction situation, reduce high-power twin arc and interfere with each other.
(3) welding quality is high.High-power mariages pulse MIC welding is big to the heat input of material, therefore causes weld metal zone and heat
Zone of influence coarse grains seriously reduce the toughness of material, are heat-treated after some structure weldings, make its application by
Limitation.The utility model acts on high-power mariages pulse MIC welding process by low frequency modulations type dipulse, by changing mariages
Output phase relationship, enhance melting bath stirring, reduce the occurrence probability of gas hole defect, while reducing thermal output, refine weld metal zone
And heat affected area crystal grain, beautiful scalelike mark weld seam is obtained, to improve welding process stability, optimization seam organization and raising
Quality of weld seam molding.
Detailed description of the invention
Fig. 1 is the overall structure block diagram of the utility model；
Fig. 2 (a) is the waveform parameter schematic diagram of the high-frequency impulse of the low frequency modulations type dipulse of the utility model；
Fig. 2 (b) is the waveform parameter schematic diagram of the low-frequency pulse of the low frequency modulations type dipulse of the utility model；
Fig. 3 (a) is the low frequency synchronisation high-frequency synchronous phase pattern dipulse waveform diagram of the utility model；
Fig. 3 (b) is the low frequency synchronisation high frequency alternating phase mode dipulse waveform diagram of the utility model；
Fig. 3 (c) is the low frequency synchronisation high frequency random phase mode dipulse waveform diagram of the utility model；
Fig. 3 (d) is the low frequency alternating high-frequency synchronous phase pattern dipulse waveform diagram of the utility model；
Fig. 3 (e) is the low frequency alternating high frequency alternating phase mode dipulse waveform diagram of the utility model；
Fig. 3 (f) is the low frequency alternating high frequency random phase mode dipulse waveform diagram of the utility model；
Fig. 3 (g) is the low frequency random high frequency random phase mode dipulse waveform diagram of the utility model；
Fig. 4 (a) is that the high-frequency direct-current square-wave current waveform generation of the low frequency modulations type dipulse waveform of the utility model is shown
It is intended to；
Fig. 4 (b) is that the middle low-frequency rectangular wave impulse current waveform of the low frequency modulations type dipulse waveform of the utility model produces
Raw schematic diagram；
Fig. 5 (a) is the host control program flow chart of the utility model；
Fig. 5 (b) is the slave control program flow diagram of the utility model.
Specific embodiment
Below with reference to examples and drawings, the utility model is described in further detail, but the reality of the utility model
It is without being limited thereto to apply mode.
A kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase as shown in Figure 1, including
STM32 human-computer interface module, the STM32 human-computer interface module pass through the DSP digital coordination in CAN bus and host power supply
Control module connection, the host power supply provide electric current for main machine arc load, and the STM32 human-computer interface module passes through CAN
Bus is connect with from the DSP digital coordination control module in electromechanical source, described to provide electricity from electromechanical source for slave arc load
Stream；
It the host power supply and is composed in parallel respectively by two main circuits from electromechanical source, the host power supply and from electromechanical source
Main circuit one end connect with three-phase alternating current, connect after the other end is in parallel with arc load, the main circuit includes input rectifying
Filter module, high-frequency inversion module, power voltage changing module and output rectification filter module；
The control circuit includes DSP digital coordination control module, high-frequency drive module, measure voltage & and
Failure protection module；
One end of the high-frequency drive module is connect with one end of high-frequency inversion module, the other end and DSP digital coordination
The end PWM of control module connects；
Described measure voltage & one end is connect with arc load, the other end and DSP digital coordination control module
A/D input terminal connection；
One end of the failure protection module is connect with one end of input rectifying filter module, and the other end and DSP are digitized
One end of Collaborative Control module connects；
The STM32 human-computer interface module and DSP digital coordination control module are connected with each other.
Wherein, eCAN module built in the STM32 human-computer interface module and the DSP digital coordination control module is realized
Digital coordination control between upper computer and lower computer, to realize the low-and high-frequency dipulse phase output of 7 kinds of modes.
Working principle of the utility model is: high by the predetermined output that STM32 human-computer interface module inputs principal and subordinate's electromechanical source
Low frequency modulations type double-pulse parameters, while DSP digital coordination control module collects electric arc by measure voltage &
Voltage and welding current signal, the arc voltage and weldering that DSP digital coordination control module gives STM32 human-computer interface module
Current signal is connect compared with from the collected two-way arc voltage of measure voltage & and welding current signal, is passed through
DSP digital coordination control module closed loop control algorithm generates control signal function in ePWM output module, if main circuit is adopted
PWM duty cycle is then changed by dynamic with hard switching to control the IGBT on-off of main circuit to keep voltage pulse output or electricity
Stream；The IGBT on-off of main circuit is controlled by dynamic regulation PWM phase shifting angle if main circuit uses phase-shifting full-bridge to keep
Voltage pulse output or electric current；PFM frequency is changed to control main circuit by dynamic if main circuit is using LLC resonance
MOSFET on-off is to keep voltage pulse output or electric current.
It should be pointed out that slave described in the utility model refers to host and slave, referred to as slave.
The utility model passes through closed loop control algorithm not according to coherent pulse parameter by DSP digital coordination control module
Disconnected duty ratio, phase shifting angle or the PFM frequency for changing pwm signal, thus change the duty ratio of IGBT switching signal, phase shifting angle or
The frequency of switch mosfet signal, and then change the output electric current of power supply, form one high and one low pulse current.To reduce double electricity
The influence of active force welding quality between arc, host power supply and between electromechanical source by STM32 human-computer interface module by CAN it is total
The phase duty mode of line communication adjustment principal and subordinate's electromechanical source.
The control method of power-supply system includes the following steps: that slave passes through STM32 human-computer interface module respectively and inputs to
Determine low-and high-frequency impulse phase operating mode and low-and high-frequency pulse parameter (flash background current Ib1, flash peak point current Ip1、
Flash base value time Tb1With flash time to peak Tp1；Weak pulse rushes background current Ib2, weak pulse peak current Ip2, weak pulse punching
Base value time Tb2Time to peak T is rushed with weak pulsep2；Flash group's current time TsWith weak impulse train current time Tw10 ginsengs in total
Number), DSP digital coordination control module enters standby shape after communicating by initializing and with the verifying of STM32 human-computer interface module
State.DSP digital coordination control module judges that arc welding gun switch is disconnected and closes in the standby state, if arc welding gun switch is closed, host to from
Machine sends striking signal, and then slave enters the striking stage, while slave constantly loops to determine respective size of current, if electric
Stream reaches certain threshold value, then realizes slave respectively according to the low-and high-frequency impulse phase mode that STM32 human-computer interface module is set
The timing control of low frequency flash and the switching of weak impulsive switched and high-frequency impulse peak value and base value, at the same it is man-machine according to STM32
The given double-pulse parameters of interface module realize the current constant control of slave output electric current.At the same time, DSP digital coordination control
The state of the continuous cycle detection arc welding gun switch of molding block, once arc welding gun switch disconnects, host is main after sending receipts arc signal to slave
Slave, which enters, to be received the arc stage, and after the completion of slave receives arc, power-supply system completes a welding process, and slave enters standby shape
State.In the standby state, DSP digital coordination control module constantly detects arc welding gun switch, once detect that arc welding gun switch is closed,
Then start new round welding process.
The utility model acts on high-power mariages pulse MIC welding process by low-and high-frequency phase modulation-type dipulse, changes
The interaction force being apt between high-power twin arc reduces high-power twin arc and interferes with each other, and enhances melting bath stirring, reduces stomata
The occurrence probability of defect reduces thermal output, refines weld metal zone and heat affected area crystal grain, obtains beautiful scalelike mark weld seam, thus
It improves welding process stability, optimization seam organization and improves quality of weld seam molding.
It is respectively the high-frequency impulse of low frequency modulations type dipulse of the utility model as shown in Fig. 2 (a) and Fig. 2 (b) and low
The waveform parameter schematic diagram of frequency pulse.Low frequency modulations type dipulse includes flash group and weak impulse train, and flash and weak pulse rush
Waveform is similar with single impulse welding waveform, and frequency is higher, referred to as high-frequency impulse；Meanwhile flash group and weak impulse train respectively as
The peak value and base value of big impulse waveform, the lower macroscopical pulse of overall structure frequency, referred to as low-frequency pulse.By Fig. 2 (a) and Fig. 2
(b) it is found that low frequency modulations type dipulse has 10 parameters for adjusting, they are: flash background current Ib1, flash peak value
Electric current Ip1, flash background current time Tb1With flash peak current time Tp1；Weak pulse rushes background current Ib2, weak pulse peak
It is worth electric current Ip2, weak pulse rush background current time Tb2Peak current time T is rushed with weak pulsep2；Flash group's current time TsAnd weak pulse
Rush group's current time Tw10 parameters in total.
In Fig. 3 (a)-Fig. 3 (g), power-supply system, which adjusts low-and high-frequency impulse phase, can be obtained 7 kinds of operating modes, be respectively:
Low frequency synchronisation high-frequency synchronous phase pattern, low frequency synchronisation high frequency alternating phase mode, low frequency synchronisation high frequency random phase mode are low
Alternately high-frequency synchronous phase pattern, low frequency replace high frequency alternating phase mode to frequency, and low frequency replaces high frequency random phase mode, low frequency
Random high frequency random phase mode.
The power-supply system work is in low frequency synchronisation high-frequency synchronous phase pattern, slave output off current HIGH low-frequency pulse
Phase is identical, i.e. low-and high-frequency pulse phase difference φh=φl=0 °, and slave low-and high-frequency pulse frequency difference is equal；Phase herein
Under bit pattern, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, i.e., when host low-frequency pulse is in the flash stage from
Machine low-frequency pulse is in the flash stage, otherwise slave low-frequency pulse is in weak when host low-frequency pulse is in weak stage pulse
Stage pulse；The peak base value of slave high-frequency impulse is synchronous to be occurred, i.e., when host high-frequency impulse is in peak phase, slave is high
Frequency pulse is in peak phase, otherwise slave high-frequency impulse is in the base value stage when host high-frequency impulse is in the base value stage；
Low frequency synchronisation phase keeps the temperature gradient of temperature field of molten pool larger, and high-frequency synchronous phase then makes twin arc annoyance level than alternately phase
Position base value electric arc interference is small, and the interference of peak value electric arc is big.
In low frequency synchronisation high frequency alternating phase mode, slave exports electric current low-frequency pulse phase for the power-supply system work
Position is identical, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low frequency
Pulse frequency is equal；But slave high-frequency impulse phase alternation, i.e. high-frequency impulse phase differenceh=180 °, slave high frequency
The peak base value of pulse is alternately present, i.e., the output of slave high-frequency impulse is prolonged than the output of host high-frequency impulse in a high-frequency impulse group
Slow half of high-frequency impulse period, and slave high-frequency impulse frequency is equal；Low frequency synchronisation phase makes the temperature difference ladder of temperature field of molten pool
Spend it is larger, high frequency alternating phase then make twin arc annoyance level than locking phase peak value electric arc interfere it is few, and base value electric arc interference
It is larger.
In low frequency synchronisation high frequency random phase mode, slave exports electric current low-frequency pulse phase for the power-supply system work
Position is identical, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low frequency
Pulse frequency is equal；But slave high-frequency impulse phase is random, the peak base value of slave high-frequency impulse occurs at random, that is, exists
The output of slave high-frequency impulse is random with host high-frequency impulse output phase in one high-frequency impulse group, and slave high-frequency impulse may
Base value or peak value are exported simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；Low frequency is same
Step phase keeps the temperature gradient of temperature field of molten pool larger, and high frequency random phase then makes peak value electric arc and base value electric arc annoyance level exist
Between high-frequency synchronous and alternating phase.
When low frequency replaces high-frequency synchronous phase pattern, the output of slave low frequency pulse current is than master for the power-supply system work
Machine low-frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, high-frequency impulse phase is same
Step, i.e. high-frequency impulse phase differenceh=0 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, i.e.,
When host low-frequency pulse is in the flash stage, slave low-frequency pulse is in weak stage pulse, otherwise at host low-frequency pulse
Slave low-frequency pulse is in the flash stage when weak stage pulse, and slave low-frequency pulse frequency is equal；But slave
The peak base value of high-frequency impulse is synchronous to be occurred, and slave high-frequency impulse frequency is equal；Low frequency alternating phase makes temperature field of molten pool
Temperature gradient is smaller, and it is small that high-frequency synchronous phase interferes twin arc annoyance level than alternating phase base value electric arc, and peak value is electric
Arc interference is larger.
The power-supply system work is when low frequency replaces high frequency alternating phase mode, the output of slave low-and high-frequency pulse current
Half of low-and high-frequency pulse period of delay, i.e. low-and high-frequency pulse phase difference φ are exported than host low-and high-frequency pulse respectivelyh=φl=
180 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, the peak base value arteries and veins of slave high-frequency impulse
Punching is also alternately present, and slave low-and high-frequency pulse frequency difference is equal；Low frequency alternating phase make the temperature gradient in temperature field compared with
Small, it is few that high frequency alternating phase interferes twin arc annoyance level than locking phase mode peak value electric arc, and base value electric arc interferes
It is larger.
When low frequency replaces high frequency random phase mode, the output of slave low frequency pulse current is than master for the power-supply system work
Machine low-frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, under this phase pattern,
The strong and weak pulse of slave low-frequency pulse is alternately present, and slave low-frequency pulse frequency is equal；But slave high-frequency impulse
Base value or peak value may be exported simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；It is low
Frequency alternating phase keeps the temperature gradient of temperature field of molten pool smaller, and high frequency random phase then makes peak value electric arc and base value electric arc interfere journey
Degree is between high-frequency synchronous and alternating phase.
The power-supply system work is in low frequency random high frequency random phase mode, the pulse electricity of slave in welding process
Stream output is irrelevant, is all respectively to give independently of each other, between the two not stringent phase relation, slave low frequency arteries and veins
Punching may export simultaneously flash or weak pulse punching, it is also possible to strong and weak pulse alternating state, and slave low-frequency pulse phase with
Machine；Slave high-frequency impulse may export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave is high
Frequency impulse phase is random；Low frequency random phase make the temperature gradient of temperature field of molten pool between low frequency synchronisation phase and alternating phase it
Between, high frequency random phase then makes twin arc annoyance level between high-frequency synchronous and alternating phase.
As shown in Fig. 4 (a) and Fig. 4 (b) be respectively the utility model low frequency modulations type dipulse waveform high-frequency direct-current
Square-wave current waveform and middle low-frequency rectangular wave impulse current waveform generate schematic diagram.By taking hard switching main circuit as an example, low frequency modulations
Type dipulse waveform generate basic functional principle are as follows: three-phase alternating current is rectified become direct current after be reverse into inverter
The high-frequency ac square wave current of 20kHz, then by becoming high-frequency direct-current square wave current after Transformer Rectifier, the high-frequency direct-current square wave
Electric current is finally converted into middle low-frequency rectangular wave impulse electric current after inductor filter.It must be subject to, it is emphasized that exporting the big of electric current
Small related with duty ratio, duty ratio is bigger, and electric current is bigger；Duty ratio is smaller, and electric current is smaller.Therefore, changing duty ratio size is
Changeable output size of current.Based on this principle it is found that passing through the duty ratio for changing pulse current, output electric current can be allowed to become
Become smaller greatly, forms the middle low-frequency rectangular wave impulse electric current of 1~200Hz.In fact, exactly DSP program is according to coherent pulse parameter
Constantly change the duty ratio of pwm signal, to change IGBT switching signal duty ratio, and then changes the output electric current of power supply, shape
At one high and one low middle low-frequency rectangular wave impulse electric current.The realization principle of total impulse waveform is to be realized with DSP internal processes
Pulse width modulation to 20kHz high frequency carrier waveform, filter inductance then realize the demodulation to modulation waveform, finally obtain full
Low frequency modulations type dipulse waveform needed for sufficient welding procedure.
As shown in Fig. 5 (a) and Fig. 5 (b) be respectively the utility model host control method flow chart and slave controlling party
Method flow chart.Low frequency modulations type double PMIG welding welding wave parameter includes flash background current Ib1, flash peak point current Ip1、
Flash background current time Tb1With flash peak current time Tp1；Weak pulse rushes background current Ib2, weak pulse peak current
Ip2, weak pulse rush background current time Tb2Peak current time T is rushed with weak pulsep2；Flash group's current time TsWith weak impulse train electricity
Flow time Tw10 parameters in total.Host low frequency modulations type dipulse, which generates, mainly realizes that low frequency modulations type is double by timer T2
The switching of pulse.The course of work of slave is controlled by host, and slave waveform switch is also the strong and weak arteries and veins sended over according to host
Rush the switching that phase pattern signal realizes low-and high-frequency impulse waveform.The strong and weak impulse phase mode signal that host is sent contains height
The state in low-frequency pulse each stage, slave then continually scan for the strong and weak impulse phase mode signal of host transmission, and according to connecing
The strong and weak impulse phase mode signal received realizes the output of low-and high-frequency pulse.10 of low frequency modulations type double PMIG welding welding wave
Parameter is all given by STM32 human-computer interface module, be it is easy to use, these parameters pulse parameter calculating in carry out one
Determine the conversion of degree.
The control method of the power-supply system include the following steps: DSP digital coordination control module by initialization and with
Enter standby mode after the verifying communication of STM32 human-computer interface module.DSP digital coordination control module judges in the standby state
Arc welding gun switch is disconnected to be closed, if arc welding gun switch is closed, host sends striking signal to slave, and then slave enters the striking stage, together
When slave constantly loop to determine respective size of current, if electric current reaches certain threshold value, set according to STM32 human-computer interface module
Fixed low-and high-frequency impulse phase mode realize respectively the flash of slave low frequency and weak impulsive switched and high-frequency impulse peak value and
The timing control of base value switching, while slave output electricity is realized according to the double-pulse parameters that STM32 human-computer interface module gives
The current constant control of stream.At the same time, the state of the continuous cycle detection arc welding gun switch of DSP digital coordination control module, once weldering
Rifle switch disconnects, and slave, which enters, after host sends receipts arc signal to slave receives the arc stage, and after the completion of slave receives arc, system is complete
Cheng Yici welding process, slave enter standby mode.In the standby state, DSP digital coordination control module constantly detects
Arc welding gun switch then starts new round welding process once detecting that arc welding gun switch is closed.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by described
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (8)
1. a kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase, which is characterized in that the electricity
Source system includes STM32 human-computer interface module, host power supply and from electromechanical source,
The host power supply provides electric current for main machine arc load, described to provide electric current from electromechanical source for slave arc load；Institute
It states host power supply and is made of respectively two main circuits and control circuit in parallel from electromechanical source, wherein every main circuit one end
It connect with three-phase alternating current, is connect after the other end is in parallel with arc load, every main circuit includes the input rectifying filter being linked in sequence
Wave module, high-frequency inversion module, power voltage changing module and output rectification filter module；
Every control circuit includes DSP digital coordination control module, high-frequency drive module, measure voltage & and failure
Protective module；
One end of the high-frequency drive module is connect with one end of high-frequency inversion module, and the other end and DSP digital coordination control
The end PWM of module connects；
One end of the measure voltage & is connect with arc load, the other end and DSP digital coordination control module
The connection of A/D input terminal；
One end of the failure protection module is connect with one end of input rectifying filter module, the other end and DSP digital coordination
One end of control module connects；
The STM32 human-computer interface module is connected with the DSP digital coordination control module in host power supply respectively by CAN bus
It connects, the STM32 human-computer interface module is connected with from the DSP digital coordination control module in electromechanical source respectively by CAN bus
It connects.
2. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, eCAN module built in the STM32 human-computer interface module and the DSP digital coordination control module is realized upper
Digital coordination control between machine and slave computer, to realize the low-and high-frequency dipulse phase output of 7 kinds of modes.
3. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, the built-in ePWM output module for generating pwm signal of the DSP digital coordination control module.
4. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, the DSP digital coordination control module uses TMS320F28335.
5. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 2,
It is characterized in that, the low-and high-frequency dipulse phase output of 7 kinds of modes is respectively: low frequency synchronisation high-frequency synchronous phase pattern, low
The synchronous high frequency alternating phase mode of frequency, low frequency synchronisation high frequency random phase mode, low frequency replace high-frequency synchronous phase pattern, low frequency
Alternately high frequency alternating phase mode, low frequency replace high frequency random phase mode, low frequency random high frequency random phase mode, wherein
The power-supply system work is in low frequency synchronisation high-frequency synchronous phase pattern, slave output off current HIGH low-frequency pulse phase
It is identical, i.e. low-and high-frequency pulse phase difference φh=φl=0 °, and slave low-and high-frequency pulse frequency difference is equal；In this phase mode
Under formula, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, i.e., when host low-frequency pulse is in the flash stage, slave is low
Frequency pulse is in the flash stage, otherwise slave low-frequency pulse is in weak pulse punching when host low-frequency pulse is in weak stage pulse
Stage；The peak base value of slave high-frequency impulse is synchronous to be occurred, i.e. the slave high frequency arteries and veins when host high-frequency impulse is in peak phase
Punching is in peak phase, otherwise slave high-frequency impulse is in the base value stage when host high-frequency impulse is in the base value stage；Low frequency
Locking phase keeps the temperature gradient of temperature field of molten pool larger, and high-frequency synchronous phase then makes twin arc annoyance level than alternating phase base
It is small to be worth electric arc interference, and the interference of peak value electric arc is big；
In low frequency synchronisation high frequency alternating phase mode, slave exports electric current low-frequency pulse phase phase for the power-supply system work
Together, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low-frequency pulse
Frequency is equal；But slave high-frequency impulse phase alternation, i.e. high-frequency impulse phase differenceh=180 °, slave high-frequency impulse
Peak base value be alternately present, i.e., the output of slave high-frequency impulse is than host high-frequency impulse output delay half in a high-frequency impulse group
A high-frequency impulse period, and slave high-frequency impulse frequency is equal；Low frequency synchronisation phase make the temperature gradient of temperature field of molten pool compared with
Greatly, high frequency alternating phase interferes twin arc annoyance level than locking phase peak value electric arc few, and the interference of base value electric arc is larger；
In low frequency synchronisation high frequency random phase mode, slave exports electric current low-frequency pulse phase phase for the power-supply system work
Together, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low-frequency pulse
Frequency is equal；But slave high-frequency impulse phase is random, the peak base value of slave high-frequency impulse occurs at random, i.e., in a height
The output of slave high-frequency impulse is random with host high-frequency impulse output phase in frequency impulse train, and slave high-frequency impulse is possible while defeated
Base value or peak value out, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；Low frequency synchronisation phase
Keep the temperature gradient of temperature field of molten pool larger, high frequency random phase then makes peak value electric arc and base value electric arc annoyance level same in high frequency
Between step and alternating phase；
When low frequency replaces high-frequency synchronous phase pattern, the output of slave low frequency pulse current is lower than host for the power-supply system work
Frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, high-frequency impulse Phase synchronization, i.e.,
High-frequency impulse phase differenceh=0 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, that is, works as master
Slave low-frequency pulse is in weak stage pulse when machine low-frequency pulse is in the flash stage, otherwise when host low-frequency pulse is in weak
Slave low-frequency pulse is in the flash stage when stage pulse, and slave low-frequency pulse frequency is equal；But slave high frequency
The peak base value of pulse is synchronous to be occurred, and slave high-frequency impulse frequency is equal；Low frequency alternating phase makes the temperature difference of temperature field of molten pool
Gradient is smaller, and it is small that high-frequency synchronous phase interferes twin arc annoyance level than alternating phase base value electric arc, and peak value electric arc is dry
It disturbs larger；
The power-supply system work is when low frequency replaces high frequency alternating phase mode, slave low-and high-frequency pulse current output difference
Half of low-and high-frequency pulse period of delay, i.e. low-and high-frequency pulse phase difference φ are exported than host low-and high-frequency pulseh=φl=180 °,
Under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, and the peak base value pulse of slave high-frequency impulse is also handed over
For appearance, and slave low-and high-frequency pulse frequency difference is equal；Low frequency alternating phase keeps the temperature gradient in temperature field smaller, high frequency
It is few that alternating phase interferes twin arc annoyance level than locking phase mode peak value electric arc, and the interference of base value electric arc is larger；
When low frequency replaces high frequency random phase mode, the output of slave low frequency pulse current is lower than host for the power-supply system work
Frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, under this phase pattern, principal and subordinate
The strong and weak pulse of machine low-frequency pulse is alternately present, and slave low-frequency pulse frequency is equal；But slave high-frequency impulse may
Base value or peak value are exported simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；Low frequency is handed over
Keep the temperature gradient of temperature field of molten pool smaller for phase, high frequency random phase then makes peak value electric arc and base value electric arc annoyance level exist
Between high-frequency synchronous and alternating phase；
In low frequency random high frequency random phase mode, the pulse current of slave is defeated in welding process for the power-supply system work
It is irrelevant out, it is all respectively given, not stringent phase relation between the two, slave low-frequency pulse can independently of each other
Flash or weak pulse punching can be exported simultaneously, it is also possible to strong and weak pulse alternating state, and slave low-frequency pulse phase is random；It is main
Slave high-frequency impulse may export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave high frequency arteries and veins
It is random to rush phase；Low frequency random phase makes the temperature gradient of temperature field of molten pool between low frequency synchronisation phase and alternating phase,
High frequency random phase then makes twin arc annoyance level between high-frequency synchronous and alternating phase.
6. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 3,
It is characterized in that, the DSP digital coordination control module generates control signal function by closed loop control algorithm and exports in ePWM
Module changes PWM duty cycle by dynamic if main circuit uses hard switching to control the IGBT on-off of main circuit to keep
Voltage pulse output or electric current；Main circuit is controlled by dynamic regulation PWM phase shifting angle if main circuit is using phase-shifting full-bridge
IGBT on-off to keep voltage pulse output or electric current；Pass through dynamic if main circuit is using LLC resonance and changes PFM frequency
Rate controls the MOSFET on-off of main circuit to keep voltage pulse output or electric current.
7. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, peak point current and burst length of the DSP digital coordination control module control low-frequency pulse to high-frequency impulse
Periodical switching is carried out, obtains periodically variable two-way power impulse train, high-power twin arc is in periodically variable two-way
Weld pool surface is acted on rigid electric arc under strong and weak impulse train effect, stirring action is generated to molten bath.
8. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, the frequency of the STM32 human-computer interface module modulation low frequency modulations type dipulse makes its frequency range and molten bath certainly
The intrinsic frequency range of body is close, and molten bath is made to generate resonance.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112388118A (en) * | 2020-10-29 | 2021-02-23 | 唐山松下产业机器有限公司 | Current control method and device for double-wire pulse welding, electronic equipment and storage medium |
| CN112404656A (en) * | 2020-11-11 | 2021-02-26 | 唐山松下产业机器有限公司 | Multi-welder coordinated control method and system |
| CN117001109A (en) * | 2023-08-22 | 2023-11-07 | 广东福维德焊接股份有限公司 | 9Ni steel deep-melting arc welding magnetic control power supply system and control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112388118A (en) * | 2020-10-29 | 2021-02-23 | 唐山松下产业机器有限公司 | Current control method and device for double-wire pulse welding, electronic equipment and storage medium |
| CN112404656A (en) * | 2020-11-11 | 2021-02-26 | 唐山松下产业机器有限公司 | Multi-welder coordinated control method and system |
| CN117001109A (en) * | 2023-08-22 | 2023-11-07 | 广东福维德焊接股份有限公司 | 9Ni steel deep-melting arc welding magnetic control power supply system and control method |
| CN117001109B (en) * | 2023-08-22 | 2024-05-31 | 广东福维德焊接股份有限公司 | 9Ni steel deep-melting arc welding magnetic control power supply system and control method |
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