CN206415753U - A kind of high-power SiC arc burying welding power sources - Google Patents
A kind of high-power SiC arc burying welding power sources Download PDFInfo
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- CN206415753U CN206415753U CN201621433220.4U CN201621433220U CN206415753U CN 206415753 U CN206415753 U CN 206415753U CN 201621433220 U CN201621433220 U CN 201621433220U CN 206415753 U CN206415753 U CN 206415753U
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Abstract
The utility model provides a kind of high-power SiC arc burying welding power sources, it is characterised in that：Including at least one main circuit and digital control circuit；Each main circuit includes electromagnetic noise suppression module, industrial frequency rectifying filtration module, SiC inverse transformations flow module, high-frequency power transformer and the high frequency fast recovery rectifier Leveling Block being sequentially connected；High frequency fast recovery rectifier Leveling Block is connected with arc load；Digital control circuit includes DSC control systems, human-computer interaction module, security protection module, hyperfrequency drive module and electrical signal detection module；Hyperfrequency drive module is connected with SiC inverse transformation flow modules；Security protection module is connected with SiC inverse transformation flow modules；Electrical signal detection module is connected with high-frequency power transformer and high frequency fast recovery rectifier Leveling Block respectively.SiC power switch pipes can be applied in arc burying welding power source by the arc burying welding power source, and reverse frequency is substantially improved, and efficiency high, small volume lifts welding quality.
Description
Technical field
The utility model is related to arc burying welding power source technical field, more specifically to a kind of high-power SiC submerged-arc weldings
Connect power supply.
Background technology
At present, it is generally whole using silicon both at home and abroad due to the high current required for its technique, high-power in submerged-arc welding field
Stream and SCR controlled rectifier power supply, reliability preferably, technical also comparative maturity, but equipment volume is huge, heavy, energy consumption is low,
Efficiency is low, and due to its reason of structure, static and dynamic performance aspect is also not ideal enough.In recent years, based on MOSFET's or IGBT
Inversion welding source is because with higher reverse frequency, efficiency obtains raising by a relatively large margin, and volume is more compact, and weight is more
Gently, dynamic characteristic is more preferable.But MOSFET single tube capacity is smaller, and on-state loss is higher, and it is not high that device is pressure-resistant, is seldom buried high-power
Applied in arc welding inverter；High-power submerged-arc welding inverter generally uses IGBT power tubes, but switching frequency is relatively low, also
It there is certain weak point：
(1) reverse frequency is relatively low；During applied to arc welding inversion field, the switching frequency of powerful IGBT power tubes is general
It is few to can exceed that 50kHz in 20kHz or so so that the volume and weight of power supply is difficult to further reduction, and power density is not
Height, while the dynamic characteristic of power supply is difficult to improve；
(2) efficiency is not high enough；Because IGBT has smearing, and on-state loss is also higher, IGBT contravariant submerged arcs
The efficiency of the source of welding current is general below 85%, it is difficult to more than 90%；
(3) IGBT heat tolerance can be weaker；Because the application environment of high-power arc burying welding power source is extremely severe, have
Weld seam is up to 40-50 meters, it is desirable to which 100% arcing time factor long-time high current continuous firing, the heat waste of device for power switching is higher, right
Heat dissipation design proposes very high requirement；
(4) it is limited to the switching speed of IGBT device, reverse frequency is difficult to improve, is difficult to realize high-power arc burying welding power source
Miniaturization, lightweight and modularization.
It would therefore be highly desirable to design a kind of new arc burying welding power source to solve the above problems.
Utility model content
The purpose of this utility model is to overcome shortcoming and deficiency of the prior art that there is provided a kind of high-power SiC submerged arcs
The source of welding current.SiC power switch pipes can be applied in arc burying welding power source by the arc burying welding power source, and inversion frequency is substantially improved
Rate, efficiency high, small volume lifts welding quality.
In order to achieve the above object, the utility model is achieved by following technical proposals：A kind of high-power SiC submerged arcs
The source of welding current, it is characterised in that：Including at least one main circuit, and digital control circuit；Each main circuit includes connecting successively
Electromagnetic noise suppression module, industrial frequency rectifying filtration module, SiC inverse transformations flow module, high-frequency power transformer and the high frequency connect is fast
Fast rectification Leveling Block；Wherein, electromagnetic noise suppression module is connected with three-phase alternating current input power；The smooth mould of high frequency fast recovery rectifier
Block is connected with arc load；
The digital control circuit includes DSC control systems, and the man-machine interaction mould being connected respectively with DSC control systems
Block, security protection module, hyperfrequency drive module and electrical signal detection module；The hyperfrequency drive module also with SiC inversions
Change of current module is connected；Security protection module is also connected with SiC inverse transformation flow modules；Electrical signal detection module also respectively with high frequency work(
Rate transformer and the connection of high frequency fast recovery rectifier Leveling Block.
Preferably, the setting of the main circuit and digital control circuit is using one of the following two kinds scheme：
First, main circuit is one；DSC control systems, human-computer interaction module, security protection module, hyperfrequency drive module
It it is respectively one with electrical signal detection module；Human-computer interaction module, security protection module, hyperfrequency drive module and electric signal inspection
Module is surveyed to be connected with DSC control systems respectively；Hyperfrequency drive module is connected with SiC inverse transformation flow modules；Security protection module
It is connected with SiC inverse transformation flow modules；Electrical signal detection module respectively with high-frequency power transformer and the smooth mould of high frequency fast recovery rectifier
Block is connected；
2nd, main circuit is two or more；DSC control systems, human-computer interaction module and security protection module are respectively one；
The quantity of hyperfrequency drive module and electrical signal detection module is identical with the quantity of main circuit respectively；Human-computer interaction module, safety
Protection module, hyperfrequency drive module and electrical signal detection module are connected with DSC control systems respectively；The security protection module
It is connected respectively with each hyperfrequency drive module；Each hyperfrequency drive module is also one-to-one with SiC inverse transformation flow modules respectively
Connection；In same main circuit, high-frequency power transformer and high frequency fast recovery rectifier Leveling Block respectively with same electrical signal detection mould
Block is connected.
Preferably, the SiC inverse transformations flow module includes SiC power switch pipe G1, SiC power switch pipe G2, SiC power
Switching tube G3, SiC power switch pipe G4, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, resistance R5, resistance R6, resistance
R7, resistance R8, electric capacity C27 and electric capacity C29；High-frequency power transformer includes transformer T1；High frequency fast recovery rectifier Leveling Block bag
Include resistance R1, resistance R2, electric capacity C15, electric capacity C16, SiC fast recovery rectifier diode D1, SiC fast recovery rectifier diode D2, SiC fast
Fast commutation diode D3, SiC fast recovery rectifier diode D4 and inductance L1；
SiC power switch pipe G1 and SiC power switch pipes G2 connect, afterwards respectively with SiC power switch pipe G3 and SiC work(
Series circuit, electric capacity C29 and the industrial frequency rectifying filtration module of rate switching tube G4 compositions are in parallel；Electric capacity C11 connects with resistance R5
It is in parallel with SiC power switch pipes G1 afterwards；Electric capacity C12 is in parallel with SiC power switch pipes G2 after being connected with resistance R6；Electric capacity C13 with
It is in parallel with SiC power switch pipes G3 after resistance R7 series connection；Electric capacity C14 is in parallel with SiC power switch pipes G4 after being connected with resistance R8；
SiC power switch pipe G1 and SiC power switch pipes G2 tie point passes through electric capacity C27, transformer T1 primary and SiC
Power switch pipe G3 and SiC power switch pipe G4 tie point connection；First output end of T1 level of transformer is quick by SiC
3rd output end of T1 level of commutation diode D1 and SiC fast recovery rectifier diode D3 and transformer is connected；Electric capacity C15 and resistance
It is in parallel with SiC fast recovery rectifier diode D1 and SiC fast recovery rectifier diodes D2 respectively after R1 series connection；Electric capacity C18 and resistance R2 strings
It is in parallel with SiC fast recovery rectifier diode D3 and SiC fast recovery rectifier diodes D4 respectively after connection；SiC fast recovery rectifier diodes D1 and
SiC fast recovery rectifier diodes D3 tie point is connected to the anode of arc load by inductance L1；The negative terminal of arc load and change
The second output end connection of T1 level of depressor.
Preferably, the industrial frequency rectifying filtration module include rectifier bridge BR1, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8,
Resistance R3 and resistance R4；
The input of the rectifier bridge BR1 is connected with electromagnetic noise suppression module；Electric capacity C5, electric capacity C7 and resistance R3 compositions
Parallel circuit, the parallel circuit in series then constituted with electric capacity C6, electric capacity C8 and resistance R4, is parallel to rectifier bridge BR1's afterwards
Output end.
Preferably, the hyperfrequency drive module includes power supply circuit, push-pull output circuit, Magnetic isolation circuit and letter
Number shaping circuit.
Preferably, the power supply circuit is electric by model LM2596s regulator U105 and its periphery
Road is constituted.
Preferably, the push-pull output circuit includes model IXDN609PI switching amplifier U101 and its periphery electricity
Road, and model IXDN609PI switching amplifier U102 and its peripheral circuit；Switching amplifier U101 and switching amplifier
U102 input is connected with SiC inverse transformation flow modules respectively, and output end is connected with the Magnetic isolation circuit respectively.
Preferably, the Magnetic isolation circuit is made up of pulse transformer T101；The signal transformation circuit includes two groups of knots
Structure identical signal shaping unit one and signal shaping unit two；Signal shaping unit one and signal shaping unit two are with phase negative side
It is connected to two coils respectively with T101 level of pulse transformer.
Preferably, the electrical signal detection module include high-frequency power transformer primary current high speed and precision rectification circuit,
Arc load current detection circuit and arc load voltage real-time detection circuit.
Preferably, the security protection module includes input overvoltage/under-voltage diagnostic circuit and overheat diagnostic circuit.
Design principle of the present utility model is：The utility model employs SiC hyperfrequencies inversion change of current new technology of new generation,
Conductivity modulation effect is not present in SiC power switch pipes, and almost without Reverse recovery effect, device working environment is improved, switch
Speed reaches Microsecond grade, and heat tolerance is more than 2 times of IGBT, can reduce radiator structure, be advantageously implemented arc burying welding power source
Miniaturization, pressure-resistant up to more than 1700V, the current capacity of single tube is particularly suitable for high-power submerged arc welding applied field up to 300A
Close；According to specific power output demand, main circuit of the present utility model can have one or more.Three-phase alternating current input power
Electromagnetic noise suppression circuit is first passed around, then rectifying and wave-filtering is carried out by industrial frequency rectifying filtration module, is converted to smoother
High voltage direct current, then inputs SiC inverse transformation flow modules, opens and turn off by the hyperfrequency of SiC power switch pipes, be transformed into
High-frequency and high-voltage ac square wave pulse, then carries out electrical isolation, transformation and power by high-frequency power transformer and transmits, be changed into
The ac square wave pulse of low-voltage, high-current, eventually passes the high frequency fast recovery rectifier Leveling Block based on SiC fast recovery rectifier diodes
Being converted to low-voltage DC, there is provided to arc load.Security protection module detect in real time three-phase alternating current input power voltage and
The temperature rise of SiC power switch pipes, once occur it is over-pressed, under-voltage, overheat situations such as, the output of security protection module will trigger DSC
The fault interrupting port of control system, calls error protection task, closes PWM outputs, it is ensured that main circuit safety.
Compared with prior art, the utility model has the following advantages that and beneficial effect：
1st, the utility model employs a new generation based on SiC power devices in high-power arc burying welding power source and surpassed first
High-frequency inversion commutation technique, reverse frequency improves more than 10 times than existing IGBT arc burying welding power sources, and it is left that efficiency improves 10%
The right side, volume is more compact, and weight is lighter, saves substantial amounts of manufacture raw material, and comprehensive manufacturing cost is lower；
2nd, the utility model is employed in high-power arc burying welding power source based on high-speed, high precision microprocessor DSC first
All-digitized demodulator technology, with reference to hyperfrequency inversion commutation technique so that the utility model possesses superfast dynamic response
Performance, arcing initiation success rate is high, and the regulation and control to welding arc are more accurate, and real-time is stronger, and welding procedure quality is easier to obtain
Ensure, combination property improves more than 4 times.
Brief description of the drawings
Fig. 1 is the structural principle block diagram of the utility model arc burying welding power source；
Fig. 2 is the main circuit schematic diagram of the utility model arc burying welding power source；
Fig. 3 (a)~Fig. 3 (c) is the circuit theory diagrams of the hyperfrequency drive module of the utility model arc burying welding power source；
Fig. 4 is the schematic diagram of the function of the digital control circuit of the utility model arc burying welding power source；
Fig. 5 is the circuit theory diagrams of the electrical signal detection module of the utility model arc burying welding power source；
Fig. 6 is the circuit theory diagrams of the security protection module of the utility model arc burying welding power source；
Fig. 7 is the structure principle chart of the human-computer interaction module of the utility model arc burying welding power source.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment one
As shown in Fig. 1~Fig. 7, the high-power SiC arc burying welding power sources of the present embodiment, including two main circuits, and numeral
Control circuit；Each main circuit includes the electromagnetic noise suppression module being sequentially connected, industrial frequency rectifying filtration module, SiC inverse transformations
Flow module, high-frequency power transformer and high frequency fast recovery rectifier Leveling Block；Wherein, electromagnetic noise suppression module and three-phase alternating current are defeated
Enter power supply connection；High frequency fast recovery rectifier Leveling Block is connected with arc load.
Digital control circuit include DSC control systems, and be connected respectively with DSC control systems human-computer interaction module,
Security protection module, hyperfrequency drive module and electrical signal detection module.DSC control systems, human-computer interaction module and safety are protected
It is respectively one to protect module；The quantity of hyperfrequency drive module and electrical signal detection module is respectively two；Security protection module
It is connected respectively with each hyperfrequency drive module；Each hyperfrequency drive module is also one-to-one with SiC inverse transformation flow modules respectively
Connection；In same main circuit, high-frequency power transformer and high frequency fast recovery rectifier Leveling Block respectively with same electrical signal detection mould
Block is connected.
In main circuit, industrial frequency rectifying filtration module includes rectifier bridge BR1, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electricity
Hinder R3 and resistance R4.Rectifier bridge BR1 input is connected with electromagnetic noise suppression module；Electric capacity C5, electric capacity C7 and resistance R3 groups
Into parallel circuit, the parallel circuit in series then constituted with electric capacity C6, electric capacity C8 and resistance R4 is parallel to rectifier bridge BR1 afterwards
Output end.
SiC inverse transformations flow module include SiC power switch pipe G1, SiC power switch pipe G2, SiC power switch pipes G3,
SiC power switch pipes G4, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, resistance R5, resistance R6, resistance R7, resistance R8,
Electric capacity C27 and electric capacity C29；High-frequency power transformer includes transformer T1；High frequency fast recovery rectifier Leveling Block includes resistance R1, electricity
Hinder R2, electric capacity C15, the pole of electric capacity C16, SiC fast recovery rectifier diode D1, SiC fast recovery rectifier diode D2, SiC fast recovery rectifier two
Pipe D3, SiC fast recovery rectifier diode D4 and inductance L1.
SiC power switch pipe G1 and SiC power switch pipes G2 connect, afterwards respectively with SiC power switch pipe G3 and SiC work(
Series circuit, electric capacity C29 and the industrial frequency rectifying filtration module of rate switching tube G4 compositions are in parallel；Electric capacity C11 connects with resistance R5
It is in parallel with SiC power switch pipes G1 afterwards；Electric capacity C12 is in parallel with SiC power switch pipes G2 after being connected with resistance R6；Electric capacity C13 with
It is in parallel with SiC power switch pipes G3 after resistance R7 series connection；Electric capacity C14 is in parallel with SiC power switch pipes G4 after being connected with resistance R8.
SiC power switch pipe G1 and SiC power switch pipes G2 tie point passes through electric capacity C27, transformer T1 primary and SiC
Power switch pipe G3 and SiC power switch pipe G4 tie point connection；First output end of T1 level of transformer is quick by SiC
3rd output end of T1 level of commutation diode D1 and SiC fast recovery rectifier diode D3 and transformer is connected；Electric capacity C15 and resistance
It is in parallel with SiC fast recovery rectifier diode D1 and SiC fast recovery rectifier diodes D2 respectively after R1 series connection；Electric capacity C18 and resistance R2 strings
It is in parallel with SiC fast recovery rectifier diode D3 and SiC fast recovery rectifier diodes D4 respectively after connection；SiC fast recovery rectifier diodes D1 and
SiC fast recovery rectifier diodes D3 tie point is connected to the anode of arc load by inductance L1；The negative terminal of arc load and change
The second output end connection of T1 level of depressor.
Wherein, electric capacity C29 is dc bus sudden-wave absorbing electric capacity；Electric capacity C27 is capacitance；Resistance R5-R8 is power
Resistance, can be designed as different resistances, or zero resistance according to SiC power switch pipes G1-G4 different commutating modes；Work as electricity
When to hinder R5-R8 be zero resistance, electric capacity C11-C14 be SiC power switch pipes G1-G4 loong shunts electric capacity and internal parasitic capacitances etc.
Imitate capacitance；SiC inverse transformations flow module can also use semi-bridge inversion structure, and now hyperfrequency drive module only needs to provide half
Bridge drives.
Hyperfrequency drive module can be half-bridge driven mode of operation, and full-bridge driving can also be made up of two half-bridge drivens
Mode of operation.Fig. 3 (a)~Fig. 3 (c) shows the circuit theory diagrams of half-bridge driven mode of operation.Hyperfrequency drive module includes supplying
Electric power circuit, push-pull output circuit, Magnetic isolation circuit and signal transformation circuit.
Wherein, power supply circuit is made up of model LM2596s regulator U105 and its peripheral circuit.
The input voltage of power supply circuit may be up to 40V, export 1.2V~37V adjustable voltage, and output current can reach 3A, have
In overtemperature protection and current-limiting protection function, the present embodiment, the output voltage set is direct current 24V.
Push-pull output circuit includes model IXDN609PI switching amplifier U101 and its peripheral circuit, and model
For IXDN609PI switching amplifier U102 and its peripheral circuit；Switching amplifier U101 and switching amplifier U102 input
End is connected with SiC inverse transformation flow modules respectively, and output end is connected with the Magnetic isolation circuit respectively.Produced by DSC control systems
Digital PWM signal A/B pass through preceding isolation processing, the push-pull output circuit being made up of IXDN609PI is directly driven afterwards, is obtained
Driving pulse the drive signal OUT-A1 and OUT-B1 of two-way recommending output mode.
Magnetic isolation circuit is made up of pulse transformer T101；The signal transformation circuit includes two groups of structure identical signals
Shaping unit one and signal shaping unit two；Signal shaping unit one and signal shaping unit two in the opposite direction respectively with pulse
Two coils connection of T101 level of transformer.
Signal shaping unit one includes diode D113, diode D117, voltage-regulator diode D122, voltage-regulator diode
D125, voltage-regulator diode D126, double diode group DQ101, resistance R105, resistance R109, resistance R117, resistance R121 and switch
Pipe Q101；
Pulse transformer T101 secondary first coil one end passes sequentially through diode D117, voltage-regulator diode D122, steady
Pressure diode D126, voltage-regulator diode D125 are connected with diode D113；Diode D113 and Magnetic isolation circuit secondary first
The coil other end is connected；Secondary first coil one end of Magnetic isolation circuit is also connected by resistance 109 with diode D113；Voltage stabilizing
Diode D122 is connected by resistance R113 and double diode group DQ101 with diode D113；Voltage-regulator diode D122 also passes through
Resistance R121 and resistance R117 are connected with diode D113；Diode D117 and voltage-regulator diode D122 junction passes through switch
Pipe Q101 is connected with diode D113, and resistance R109 is connected with diode D117 junctions with switching tube Q101；Resistance 105 is in parallel
At diode D113 two ends；Electric capacity C115 is connected in parallel on voltage-regulator diode D122 two ends.Signal transformation circuit produces positive 20V, born
5.1V SiC power switch drive voltage signals, what hoisting power was switched turns on and off speed.
As shown in figure 4, digital control circuit of the present utility model is using DSC control systems as core, including electrical signal detection
Module, human-computer interaction module, DSC control systems, hyperfrequency drive module and security protection module.Wherein, electrical signal detection mould
Block detects actual output current voltage of the primary side peak point current with each main circuit of high-frequency power transformer simultaneously, realizes inner ring
With the bicyclic electrical signal detection of outer shroud, and the ADC ports that the bicyclic signal is inputted into DSC control systems carry out analog-to-digital conversion；DSC is controlled
System processed carries out data communication by UART ports and human-computer interaction module, obtains default given parameters；DSC control systems pair
Parameter preset, inner loop feedback value and outer loop feedback value are carried out at high-speed computation according to embedded Fuzzy cascade control algorithm
Reason, on the one hand obtains the digital PWM signal of duty ratio corresponding and frequency, and the signal is input to hyperfrequency drive module and put through isolation
Driving SiC power switch pipes after big, on the other hand judge whether the output of the source of welding current exceedes the maximum allowed, once place
The output of digital PWM is then directly closed in over-current state；So just form a bicyclic regulation and control and protective loop.DSC controls system
System controls cooling water input, the start and stop of submerged arc welding dolly, wire feed start and stop and other peripheral servicing units by GPIO port
Control；DSC control systems are communicated by UART ports and human-computer interaction module, realize showing, preset and running for parameter
The display and monitoring of state, can additionally pass through CAN communication interface and supporting digital wire feeder or other execution
Mechanism is connected, so as to realize the total digitalization of whole submerged arc welding system.
The real-time detection module of electric signal includes three parts, i.e., by resistance R300-R305, operational amplifier U301-U302
With diode D300-D303 constitute high-frequency power transformer primary current high speed and precision rectification circuit, by resistance R306-
Arc load current detection circuit that R308, electric capacity C300-C302, diode D304-305 and operational amplifier U303 are constituted,
And the arc load being made up of resistance R309-R315, electric capacity C303-C307, operational amplifier U304-U306 and optocoupler U307
Voltage real-time detection circuit.Wherein, IpFor the primary current signal of high-frequency power transformer, IoFor arc load current signal, Uo
For the voltage signal at arc load two ends；These three signals all import voltage signal converter U308 after processing, so
It is conveyed to DSC control systems respectively afterwards.
Security protection module includes input overvoltage/under-voltage diagnostic circuit and overheat diagnostic circuit.
Security protection module also mainly include two parts, i.e., by resistance R203, resistance R206, resistance R209, resistance R210,
Resistance R212, resistance R217, comparator U201, comparator U202, U204, electric capacity C224 and electric capacity C225 composition inputs overvoltage/
Under-voltage diagnostic circuit, and by inductance L201, inductance L202, electric capacity C226, electric capacity C227, resistance R211, resistance R213, two poles
Pipe D201, diode D202, comparator U203 etc. constitute overheat diagnostic circuit.Wherein, VC passes through for three-phase alternating current input power
Voltage signal after transformer pressure-reducing rectification, by being connected by resistance R203/R209 with resistance R206/R210 partial pressure, institute
The in-phase end and end of oppisite phase that the partial pressure value of acquisition respectively enters comparator U201 and U202 are compared with default set-point, such as
Fruit produces overvoltage and undervoltage condition, then comparator U201 and U202 output occurs reverse.Similarly, overheating detection terminal directly connects
Connect the thermistor on SiC power switch pipe G1-G4 radiators and high-frequency power transformer primary coil, the resistance
Connected with resistance R211 partial pressure；When the temperature increases, its resistance can change so that the voltage of comparator U203 end of oppisite phase
Change, the reference voltage level of the magnitude of voltage and comparator U203 in-phase end is compared, once temperature rise exceedes preset value,
Then comparator U203 output will be inverted.U204 and comparator U203 output signal can pass through after phase inverter U205
DSC control systems are transferred to respectively, interruptive port is triggered, calls the interruption defence program being embedded in DSC control systems, are closed
The output of digital PWM, realizes the protection to main circuit.
As shown in fig. 7, human-computer interaction module described in the utility model mainly include DSC microprocessors, RA8875 drivers,
TFT-LCD touch-screens, BOOST backlight electric powers and its peripheral auxiliary circuits connection composition.Wherein, DSC microprocessors pass through UART
Bus is connected with DSC control systems, realizes the digital, interactive of human-computer interaction module and DSC control systems；DSC passes through to RA8875
Display of the pertinent image information in TFT-LCD is realized in the read-write of internal register；Adjust RA8875 backlight control pwm signal
BOOST back lights can be adjusted, the adjustment of TFT-LCD backlights is realized.
Design principle of the present utility model is：The utility model employs SiC hyperfrequencies inversion change of current new technology of new generation,
Conductivity modulation effect is not present in SiC power switch pipes, and almost without Reverse recovery effect, device working environment is improved, switch
Speed reaches Microsecond grade, and heat tolerance is more than 2 times of IGBT, and pressure-resistant up to more than 1700V, the current capacity of single tube is reachable
300A, is particularly suitable for high-power submerged arc welding application scenario.Three-phase alternating current input power first passes around electromagnetic noise suppression circuit,
Then rectifying and wave-filtering is carried out by industrial frequency rectifying filtration module, is converted to smoother high voltage direct current, then input SiC inversions
Change of current module, is opened and is turned off by the hyperfrequency of SiC power switch pipes, is transformed into high-frequency and high-voltage ac square wave pulse, then
Electrical isolation, transformation and power are carried out by high-frequency power transformer to transmit, and are changed into the ac square wave pulse of low-voltage, high-current,
The high frequency fast recovery rectifier Leveling Block based on SiC fast recovery rectifier diodes is eventually passed to be converted to low-voltage DC there is provided to electricity
Arc is loaded.In the power conversion process of SiC inverse transformation flow modules, DSC control systems detect electrical signal detection module
Load current, load voltage and transformer primary side peak-current signal and the default parameter of human-computer interaction module constitute double feedbacks
Ring, and high-speed computation is carried out according to the fuzzy closed loop control algolithm being embedded in inside DSC control systems, export corresponding dutycycle
More than 200KHz digital PWM signal, and go to control SiC power switch pipes after the isolation amplification of hyperfrequency drive module
Turn on and off, obtain hyperfrequency ac square wave pulse, and turn through high-frequency power transformer and high frequency fast recovery rectifier Leveling Block
The output waveform for meeting submerged-arc welding process requirement is changed into, here it is the closed loop of high-power arc burying welding power source of the present utility model
Control process；Security protection module detects the temperature rise of the voltage and SiC power switch pipes of three-phase alternating current input power in real time, once
Situations such as over-pressed, under-voltage, overheat occur, the output of security protection module will trigger the fault interrupting port of DSC control systems, adjust
Error protection task is used, PWM outputs are closed, it is ensured that main circuit safety.
The utility model has the advantage of：
1st, the utility model employs a new generation based on SiC power devices in high-power arc burying welding power source and surpassed first
High-frequency inversion commutation technique, reverse frequency improves more than 10 times than existing IGBT arc burying welding power sources, and it is left that efficiency improves 10%
The right side, volume is more compact, and weight is lighter, saves substantial amounts of manufacture raw material, and comprehensive manufacturing cost is lower；
2nd, the utility model is employed in high-power arc burying welding power source based on high-speed, high precision microprocessor DSC first
All-digitized demodulator technology, with reference to hyperfrequency inversion commutation technique so that the utility model possesses superfast dynamic response
Performance, arcing initiation success rate is high, and the regulation and control to welding arc are more accurate, and real-time is stronger, and welding procedure quality is easier to obtain
Ensure, combination property improves more than 4 times.
Embodiment two
The high-power SiC arc burying welding power sources of the present embodiment and the difference of embodiment one are：In the present embodiment, main circuit is
One；DSC control systems, human-computer interaction module, security protection module, hyperfrequency drive module and electrical signal detection module difference
For one；Human-computer interaction module, security protection module, hyperfrequency drive module and electrical signal detection module respectively with DSC controls
System is connected；Hyperfrequency drive module is connected with SiC inverse transformation flow modules；Security protection module connects with SiC inverse transformations flow module
Connect；Electrical signal detection module is connected with high-frequency power transformer and high frequency fast recovery rectifier Leveling Block respectively.The present embodiment its
Remaining structure is identical with embodiment one.
Embodiment three
The high-power SiC arc burying welding power sources of the present embodiment and the difference of embodiment one are：In the present embodiment, main circuit is
More than three, the quantity of main circuit can be set according to specific power output demand.DSC control systems, human-computer interaction module and peace
Full guard module is respectively one；The quantity phase of the quantity of hyperfrequency drive module and electrical signal detection module respectively with main circuit
Together；Human-computer interaction module, security protection module, hyperfrequency drive module and electrical signal detection module respectively with DSC control systems
Connection；The security protection module is connected with each hyperfrequency drive module respectively；Each hyperfrequency drive module also respectively with
The one-to-one connection of SiC inverse transformations flow module；In same main circuit, high-frequency power transformer and high frequency fast recovery rectifier Leveling Block point
It is not connected with same electrical signal detection module.Remaining structure of the present embodiment is identical with embodiment one.
Above-described embodiment is the utility model preferably embodiment, but embodiment of the present utility model is not by above-mentioned
The limitation of embodiment, it is other it is any without departing from Spirit Essence of the present utility model with made under principle change, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, are included within protection domain of the present utility model.
Claims (10)
1. a kind of high-power SiC arc burying welding power sources, it is characterised in that：Including at least one main circuit, and digital control electricity
Road；Electromagnetic noise suppression module that each main circuit includes being sequentially connected, industrial frequency rectifying filtration module, SiC inverse transformations flow module,
High-frequency power transformer and high frequency fast recovery rectifier Leveling Block；Wherein, electromagnetic noise suppression module and three-phase alternating current input power
Connection；High frequency fast recovery rectifier Leveling Block is connected with arc load；
The digital control circuit include DSC control systems, and be connected respectively with DSC control systems human-computer interaction module,
Security protection module, hyperfrequency drive module and electrical signal detection module；The hyperfrequency drive module also with the SiC inversion changes of current
Module is connected；Security protection module is also connected with SiC inverse transformation flow modules；Electrical signal detection module also becomes with high frequency power respectively
Depressor and the connection of high frequency fast recovery rectifier Leveling Block.
2. high-power SiC arc burying welding power sources according to claim 1, it is characterised in that：The main circuit is controlled with numeral
The setting of circuit processed is using one of the following two kinds scheme：
First, main circuit is one；DSC control systems, human-computer interaction module, security protection module, hyperfrequency drive module and electricity
Signal detection module is respectively one；Human-computer interaction module, security protection module, hyperfrequency drive module and electrical signal detection mould
Block is connected with DSC control systems respectively；Hyperfrequency drive module is connected with SiC inverse transformation flow modules；Security protection module and SiC
Inverse transformation flow module is connected；Electrical signal detection module connects with high-frequency power transformer and high frequency fast recovery rectifier Leveling Block respectively
Connect；
2nd, main circuit is two or more；DSC control systems, human-computer interaction module and security protection module are respectively one；Superelevation
The quantity of frequency drive module and electrical signal detection module is identical with the quantity of main circuit respectively；Human-computer interaction module, safeguard protection
Module, hyperfrequency drive module and electrical signal detection module are connected with DSC control systems respectively；The security protection module difference
It is connected with each hyperfrequency drive module；Each hyperfrequency drive module also respectively with the one-to-one connection of SiC inverse transformations flow module；
In same main circuit, high-frequency power transformer and high frequency fast recovery rectifier Leveling Block connect with same electrical signal detection module respectively
Connect.
3. high-power SiC arc burying welding power sources according to claim 1, it is characterised in that：The SiC inverse transformations flow module
Including SiC power switch pipe G1, SiC power switch pipe G2, SiC power switch pipe G3, SiC power switch pipes G4, electric capacity C11,
Electric capacity C12, electric capacity C13, electric capacity C14, resistance R5, resistance R6, resistance R7, resistance R8, electric capacity C27 and electric capacity C29；High frequency power
Transformer includes transformer T1；High frequency fast recovery rectifier Leveling Block includes resistance R1, resistance R2, electric capacity C15, electric capacity C16, SiC
Fast recovery rectifier diode D1, SiC fast recovery rectifier diode D2, SiC fast recovery rectifier diode D3, SiC fast recovery rectifier diode D4
With inductance L1；
SiC power switch pipe G1 and SiC power switch pipes G2 connects, and is opened respectively with SiC power switch pipe G3 and SiC power afterwards
The series circuit, electric capacity C29 and industrial frequency rectifying filtration module for closing pipe G4 compositions are in parallel；Electric capacity C11 connected with resistance R5 after with
SiC power switch pipes G1 is in parallel；Electric capacity C12 is in parallel with SiC power switch pipes G2 after being connected with resistance R6；Electric capacity C13 and resistance
It is in parallel with SiC power switch pipes G3 after R7 series connection；Electric capacity C14 is in parallel with SiC power switch pipes G4 after being connected with resistance R8；
SiC power switch pipe G1 and SiC power switch pipes G2 tie point passes through electric capacity C27, transformer T1 primary and SiC power
Switching tube G3 and SiC power switch pipe G4 tie point connection；First output end of T1 level of transformer passes through SiC fast recovery rectifiers
3rd output end of T1 level of diode D1 and SiC fast recovery rectifier diode D3 and transformer is connected；Electric capacity C15 and resistance R1 strings
It is in parallel with SiC fast recovery rectifier diode D1 and SiC fast recovery rectifier diodes D2 respectively after connection；After electric capacity C18 and resistance R2 series connection
It is in parallel with SiC fast recovery rectifier diode D3 and SiC fast recovery rectifier diodes D4 respectively；SiC fast recovery rectifier diodes D1 and SiC is fast
Fast commutation diode D3 tie point is connected to the anode of arc load by inductance L1；The negative terminal of arc load and transformer T1
Secondary the second output end connection.
4. high-power SiC arc burying welding power sources according to claim 3, it is characterised in that：The industrial frequency rectifying filters mould
Block includes rectifier bridge BR1, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, resistance R3 and resistance R4；
The input of the rectifier bridge BR1 is connected with electromagnetic noise suppression module；Electric capacity C5, electric capacity C7 and resistance R3 compositions are in parallel
Circuit, the parallel circuit in series then constituted with electric capacity C6, electric capacity C8 and resistance R4, is parallel to rectifier bridge BR1 output afterwards
End.
5. high-power SiC arc burying welding power sources according to claim 1, it is characterised in that：The hyperfrequency drive module
Including power supply circuit, push-pull output circuit, Magnetic isolation circuit and signal transformation circuit.
6. high-power SiC arc burying welding power sources according to claim 5, it is characterised in that：The power supply circuit by
Model LM2596s regulator U105 and its peripheral circuit composition.
7. high-power SiC arc burying welding power sources according to claim 5, it is characterised in that：The push-pull output circuit bag
Include model IXDN609PI switching amplifier U101 and its peripheral circuit, and model IXDN609PI switching amplifier
U102 and its peripheral circuit；Switching amplifier U101 and switching amplifier U102 input respectively with SiC inverse transformation flow modules
Connection, output end is connected with the Magnetic isolation circuit respectively.
8. high-power SiC arc burying welding power sources according to claim 7, it is characterised in that：The Magnetic isolation circuit is by arteries and veins
Rush transformer T101 compositions；The signal transformation circuit includes two groups of structure identical signal shaping units one and signal shaping list
Member two；Two lines of signal shaping unit one and signal shaping unit two in the opposite direction respectively with T101 level of pulse transformer
Circle connection.
9. high-power SiC arc burying welding power sources according to claim 1, it is characterised in that：The electrical signal detection module
Including high-frequency power transformer primary current high speed and precision rectification circuit, arc load current detection circuit and arc load voltage
Real-time detection circuit.
10. high-power SiC arc burying welding power sources according to claim 1, it is characterised in that：The security protection module bag
Include input overvoltage/under-voltage diagnostic circuit and overheat diagnostic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621433220.4U CN206415753U (en) | 2016-12-26 | 2016-12-26 | A kind of high-power SiC arc burying welding power sources |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621433220.4U CN206415753U (en) | 2016-12-26 | 2016-12-26 | A kind of high-power SiC arc burying welding power sources |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206415753U true CN206415753U (en) | 2017-08-18 |
Family
ID=59576086
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621433220.4U Withdrawn - After Issue CN206415753U (en) | 2016-12-26 | 2016-12-26 | A kind of high-power SiC arc burying welding power sources |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052527A (en) * | 2016-12-26 | 2017-08-18 | 华南理工大学 | A kind of high-power SiC arc burying welding power sources |
| WO2020220610A1 (en) * | 2019-04-30 | 2020-11-05 | 华南理工大学 | Double-pulse mig welding power supply based on sic power device |
| WO2020237989A1 (en) * | 2019-05-29 | 2020-12-03 | 华南理工大学 | Fast-frequency pulse tig welding system |
-
2016
- 2016-12-26 CN CN201621433220.4U patent/CN206415753U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052527A (en) * | 2016-12-26 | 2017-08-18 | 华南理工大学 | A kind of high-power SiC arc burying welding power sources |
| CN107052527B (en) * | 2016-12-26 | 2019-06-18 | 华南理工大学 | A kind of high-power SiC arc burying welding power source |
| WO2020220610A1 (en) * | 2019-04-30 | 2020-11-05 | 华南理工大学 | Double-pulse mig welding power supply based on sic power device |
| WO2020237989A1 (en) * | 2019-05-29 | 2020-12-03 | 华南理工大学 | Fast-frequency pulse tig welding system |
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