CN106077548A - A kind of round billet continuous casting end electromagnetic agitation control system - Google Patents
A kind of round billet continuous casting end electromagnetic agitation control system Download PDFInfo
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- CN106077548A CN106077548A CN201610587200.0A CN201610587200A CN106077548A CN 106077548 A CN106077548 A CN 106077548A CN 201610587200 A CN201610587200 A CN 201610587200A CN 106077548 A CN106077548 A CN 106077548A
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- converter
- magnetic stirrer
- electromagnetic agitation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
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Abstract
The present invention relates to a kind of round billet continuous casting end electromagnetic agitation control system, including industrial computer, PLC, converter and magnetic stirrer, communicated by network between described industrial computer and PLC, data interaction is carried out by fieldbus between described PLC and converter, connected by controlling cable between described converter and magnetic stirrer.By the Frequency Converter Control parameter controlling magnetic stirrer in system is carried out intelligent control, thus realize the running current curve of magnetic stirrer and the matched of ideal curve, efficiently solve that end electromagnetic agitation effective time is short and the problem of peak current impact, raising to circle base internal soundness has bigger effect, meets the production technology requirement to quality.
Description
Technical field
The present invention relates to the technical field of steel-making big cross section round billet continuous casting electromagnetic agitation, specifically a kind of round billet continuous casting
End electromagnetic agitation control system.
Background technology
At steelshop, electromagnetic agitation is the important step of inside steel billet quality control, according to the difference of its installation site,
The electromagnetic action of steel billet and the raising of quality there is different effects.Say from continuous casting process angle, the mesh of M-EMS
Be remove subsurface inclusion and pore, the floating of even solidification green shell, beneficially field trash and stablizing of pulling rate；Two cold-zone electromagnetism
The purpose of stirring is improve equiaxial crystal ratio and improve segregation, and electromagnetic force is the biggest more is conducive to improving equiaxial crystal ratio；End electromagnetism
Stir mainly for eliminating shrinkage cavity shrinkage porosity and implosion, improve segregation.It is essential that the useful effect of electromagnetic agitation is according to steel grade
Difference be set the key that the control of different electromagnetic agitation intensity, action time and intensity is strand mixing quality.For
This needs to be analyzed the service condition of the online end magnetic stirrer used, effective to find solution end electromagnetic agitation
Time is short and peak current affects the scheme of problem, to meet the production technology requirement to quality.
Summary of the invention
The present invention is just for technical problem present in prior art, it is provided that a kind of round billet continuous casting end electromagnetic agitation control
System processed, by carrying out intelligence to the Frequency Converter Control parameter controlling magnetic stirrer in continuous casting end electromagnetic stirring system
Regulation and control, thus realize the running current curve of magnetic stirrer and the matched of ideal curve, efficiently solve end electromagnetism
Effective time is short and the problem of peak current impact in stirring, and the raising to circle base internal soundness has bigger effect, meets production
The technique requirement to quality.
To achieve these goals, the technical solution used in the present invention is, a kind of round billet continuous casting end electromagnetic agitation controls
System, including industrial computer, PLC, converter and magnetic stirrer, passes through net between described industrial computer and PLC
Network communicates, and carries out data interaction, described converter and electromagnetism by fieldbus between described PLC and converter
Carry out communication one to one by control cable between agitator to connect, and then magnetic stirrer is carried out frequency setting and electric current prison
Control, three-phase alternating-current supply formation rotating excitation field connected by described magnetic stirrer makes the molten steel effect by electromagnetic force in magnetic field produce
Raw rotation.
As a modification of the present invention, led to by EPA between described industrial computer and PLC
Letter.
As a modification of the present invention, by Profibus-DP cable phase between described PLC and converter
Even.
As a modification of the present invention, described PLC uses Siemens's s7-300 series of PLC, and major control is defeated
Going out the startup for converter, stopping, rotating, failure reset, electric current and frequency setting, the quantity of described converter is four,
Four converters are referred to as " four casting stream ", and four casting streams use same PLC to be controlled.
As a modification of the present invention, the monitored picture of described industrial computer uses Siemens's wincc picture, its by with
Too Netcom's news carry out data acquisition to PLC and operation controls.
As a modification of the present invention, described converter uses peace river H1000 Series Frequency Converter, peace river converter
Under operating frequency that can be different to converter in design parameter, institute's making alive is controlled, and the electric current that thus can make generation is real
An existing good control waveform, thus realize effective control of electromagnetic field.The operating frequency of described converter is 3-8Hz, produces
Raw stir current is any one in 400/500/550/600/700A.
As a modification of the present invention, described magnetic stirrer uses the V/F control mode without PG, it is adaptable to blower fan
The V/F control mode of pump class has the biggest effect in electromagnetic agitation control to billet quality.
As a modification of the present invention, described magnetic stirrer uses rotary electric magnetic stirrer, the inwall of its armature
Protruding 6 magnetic poles, magnetic pole coil is wound around, and the most relatively forms 3 to magnetic pole；Coil is connected three-phase alternating-current supply, makes every
To magnetic pole N, S pole each other.
Three-phase alternating-current supply makes the electric current in coil present alternation feature so that the magnetic field in agitator is revolved on cross section
Turn, and then produce relative motion with molten steel and electromagnetic induction occurs；Molten steel is made by electromagnetic force in magnetic field as carrying object
With so follow magnetic field produce rotate.It is set not it is essential that the useful effect of electromagnetic agitation is the difference according to steel grade
Same electromagnetic agitation intensity, the control of action time and intensity is the key of strand mixing quality.
The method using said system to carry out current spike elimination, chooses the self-defined V/F characteristic curve of magnetic stirrer,
Solenoid operating frequency in magnetic stirrer is set in 5HZ, carries out the rotating forward of 5 seconds with the stir current of 700A, 2 seconds
Stopping and the reversion of 5 seconds of clock, the most repeatedly runs, makes E1-01 to the E1-13 parameter of converter E1 group parameter by oneself
Justice, and utilize the DC injection braking function of converter that the B2-01 of converter DC injection braking B2 parameter group is initiateed braking frequency, B2-
02 stalling current, B2-04 stop braking time and are optimized, and completely eliminate this spike.
And the method using said system to carry out the control of effective magnetic field retention time, choose any V/F of magnetic stirrer
Characteristic curve, is set in 4HZ by the solenoid operating frequency in magnetic stirrer, carries out 5 seconds with the stir current of 600A
Rotating forward, 2 seconds stop and the reversion of 5 seconds, the most repeatedly run, the E1 group parameter of converter be analyzed, tie
Close the running current curve of preferable magnetic stirrer and the V/F characteristic curve of motor itself, to converter E1 group parameter
In E1-10 voltage parameter corresponding to E1-09 frequency parameter and magnetic stirrer self-defining V/F performance plot in curve
Front four points optimized and revised, on the premise of preventing agitator starting current the most excessive, finally realize electromagnetic agitation
The running current curve of device and the matched of ideal current curve.
Relative to prior art, the overall construction design of the present invention is ingenious, and dismounting assembles convenient maintenance and replacement, and cost is relatively
Low, control accuracy is high, utilizes the equipment such as PLC, converter, industrial computer, the operation to circle base end magnetic stirrer
Parameter is optimized, and utilizes Siemens's wincc picture to realize data acquisition by ethernet communication and operation controls, solve end
Hold electromagnetic agitation effective time short and the problem of peak current impact, eliminate shrinkage cavity shrinkage porosity and implosion, improve segregation, improve
Axialite rate, the raising to circle base internal soundness has bigger effect, meets the production technology requirement to quality.
Accompanying drawing explanation
Fig. 1 is the system structure schematic diagram of the present invention.
Fig. 2 be the present invention E1 group parameter in the V/F performance diagram of magnetic stirrer.
Fig. 3 is the magnetic stirrer of present invention running current under the conditions of 5Hz operating frequency and 700A operating current
Curve chart.
Fig. 4 is the magnetic stirrer running current curve chart when eliminating parking after current spike of the present invention.
Fig. 5 is the running current curve chart of the ideally magnetic stirrer of the present invention.
Fig. 6 is the running current curve chart of the magnetic stirrer after the effective magnetic field retention time acquisition improvement of the present invention.
Detailed description of the invention
In order to deepen the understanding of the present invention and understanding, the invention will be further described below in conjunction with the accompanying drawings and introduces.
As it is shown in figure 1, a kind of round billet continuous casting end electromagnetic agitation control system, the PLC including industrial computer, as main website is controlled
Device processed, four converters as slave station, four end magnetic stirrers, described industrial computer passes through network and PLC phase
Even, communicated by network between described industrial computer and PLC, by existing between described PLC and converter
Field bus carries out data interaction, and described converter is connected by controlling cable with magnetic stirrer, and four converters are referred to as " four
Individual casting stream ", four casting streams use same PLC to be controlled.All converters lead to one to one with magnetic stirrer
News connect, and then magnetic stirrer is carried out frequency setting and current monitoring.Three-phase alternating-current supply connected by described magnetic stirrer
Forming rotating excitation field makes the molten steel effect generation by electromagnetic force in magnetic field rotate.
Concrete, described PLC uses Siemens's SP7-300 series of PLC.Described industrial computer and PLC it
Between communication network use EPA.Profibus-DP is passed through in data transmission between described PLC and converter
Cable realizes, reliable and stable.S7-300PLC is used for logical judgment, and major control is output as the startup of converter, stopping, positive and negative
Turn, failure reset, electric current and frequency setting.Converter uses peace river H1000 Series Frequency Converter, is used for realizing its DC system rotating ring
The E1-10 voltage ginseng that in the optimization of JIESHEN number and E1 group parameter, the V/F characteristic E1-09 frequency parameter of motor is corresponding
In number and V/F performance plot, front four points of curve are optimized.Industrial computer OS achieves the operational factor of magnetic stirrer
Collection and operation control and it is filed, it is achieved reviewed to the inquiry of service data.
Further, the monitored picture of described industrial computer uses Siemens's wincc picture, and it passes through ethernet communication pair
PLC carries out data acquisition and operation controls.
Further, institute's making alive under operating frequency that can be different to converter in the design parameter of peace river converter
It is controlled, the electric current of generation thus can be made to realize a good control waveform, thus realize effective control of electromagnetic field.
The operating frequency of described converter is 3-8Hz, and the stir current of generation is any one in 400/500/550/600/700A.
Further, described magnetic stirrer uses the V/F control mode without PG, it is adaptable to the V/F control of pump and fan
Mode processed has the biggest effect in electromagnetic agitation control to billet quality.Described magnetic stirrer uses rotary electromagnetic stirring
Device, the inwall of its armature protrudes 6 magnetic poles, and magnetic pole coil is wound around, and the most relatively forms 3 to magnetic pole；Coil is connected three
Cross streams power supply, makes every pair of magnetic pole N, S pole each other.
Three-phase alternating-current supply makes the electric current in coil present alternation feature so that the magnetic field in agitator is revolved on cross section
Turn, and then produce relative motion with molten steel and electromagnetic induction occurs；Molten steel is made by electromagnetic force in magnetic field as carrying object
With so follow magnetic field produce rotate.It is set not it is essential that the useful effect of electromagnetic agitation is the difference according to steel grade
Same electromagnetic agitation intensity, the control of action time and intensity is the key of strand mixing quality.
The method using said system to be controlled the current spike problem existing for existing end electromagnetic agitation, chooses
The self-defined V/F characteristic curve of magnetic stirrer, is set in 5HZ by the solenoid operating frequency in magnetic stirrer, with
The stir current of 700A carries out the rotating forward of 5 seconds, 2 seconds stop and the reversion of 5 seconds, the most repeatedly runs, and selects certainly
The V/F characteristic curve of definition motor, to meet the electric current instability problem during the frequent feed speed control of motor.From Fig. 3 institute
It can be seen that there is an electric current point in rotating alternation procedure in the running current wavy curve figure of the magnetic stirrer shown
Peak (current spike that this current spike produces when being to stop), the existence of this current spike is in the casting quality inspection of steel billet
Not there is evidence that there is harmful effect not evidence suggests advantage, thus it can be eliminated to meet effectively by we
The existence time of electric current, the steepness of the output voltage of converter can be passivated because of output reactance device, reduce the power in inverter
Element disturbance and impact, can effectively suppress loop to shove.Iron core type ferrite type can be divided into according to the difference that it selects material
Output reactance device, by eliminating device hardware problem to electric current, voltage drop, the confirmation of inductance value.Utilize converter simultaneously
DC injection braking function initiates braking frequency to the B2-01 of converter DC injection braking B2 parameter group, B2-02 stalling current, B2-04 stop
Stop the parameters such as braking time to be optimized, completely eliminate this spike.
After for the current spike Resolving probiems in docking process, the effective magnetic field retention time is carried out by emphasis by we
Improving, owing to magnetic stirrer uses any V/F curve controlled, E1-01 to E1-13 parameter can be made by oneself by it
Justice, other control modes are fixing control model, are therefore mainly analyzed in the E1 group parameter V/F characteristic of converter,
E1-07 to the E1-12 parameter optimized in E1 group parameter obtains the preferable electromagnetic agitation current intensity retention time as shown in Figure 4.
But the current curve from Fig. 4 is it can be seen that in the front 3s that magnetic stirrer starts, its running current fails to reach to set
600A current value, thus can not effectively eliminate shrinkage cavity shrinkage porosity and implosion, improve segregation.Under the setting operating frequency of 4HZ,
Magnetic stirrer carries out the alternation of rotating with the operating current of 600A, in the 5s rotating working time set, and electricity
Magnetic stirrer is guaranteeing that starting current reaches in 0.5S to set electric current and held stationary state, intermittently 2s on the premise of the most excessive
Time carry out reversion start.In conjunction with we want the preferable magnetic stirrer running current curve that obtains as shown in Figure 5 (
Ideally, magnetic stirrer start 0.5s in frequency be rapidly reached 4Hz, running current also reach set 600A with
Meet the normal electromagnetic agitation requirement produced.) and the V/F characteristic curve of magnetic stirrer itself as in figure 2 it is shown, we send out
Show front four some parameters of curve in E1-10 voltage parameter corresponding to E1-09 frequency parameter and self-defining V/F performance plot
Existing defects, is therefore optimized it, on the premise of agitator starting current is the most excessive, has finally given more perfect
Current curve as shown in Figure 6.By the actual motion current curve in Fig. 6 it can be seen that magnetic stirrer start 0.5s in
Frequency is rapidly reached 4Hz, and running current also reaches about 700A, can preferably meet the electromagnetic agitation requirement of normal production.
It is achieved thereby that the running current curve of magnetic stirrer and the matched of ideal current curve, reach to improve the internal matter of round base
The purpose of amount.
The present invention is based on peace river H1000 Series Frequency Converter, it is provided that the end electromagnetic agitation control parameter of a set of uniqueness:
E1-09=0.1、E1-07=0.4、E1-06=2、E1-11=5、E1-04=10、E1-10=5、E1-08=15、E1-13=25、E1-12=
130, E1-05=400, it is achieved thereby that the running current curve of magnetic stirrer and the matched of ideal current curve, meets
The requirement of product quality；Almost zero input, controls effect obvious, is effectively increased equiaxial crystal ratio.
It should be noted that above-described embodiment, be not used for limiting protection scope of the present invention, in technique scheme
Equivalents or replacement done by the basis of each fall within the scope that the claims in the present invention are protected.In the claims, single
Word " comprises " and does not excludes the presence of the element or step not arranged in the claims.
Claims (10)
1. a round billet continuous casting end electromagnetic agitation control system, it is characterised in that: include industrial computer, PLC, converter
And magnetic stirrer, communicated by network between described industrial computer and PLC, described PLC and converter
Between carry out data interaction by fieldbus, between described converter and magnetic stirrer by control cable carry out one to one
Communication connects, and then magnetic stirrer carries out frequency setting and current monitoring, and three-phase alternating current connected by described magnetic stirrer
Source forms rotating excitation field makes the molten steel effect generation by electromagnetic force in magnetic field rotate.
2. a kind of round billet continuous casting end electromagnetic agitation control system as claimed in claim 1, it is characterised in that described industrial computer
And communicated by EPA between PLC.
3. a kind of round billet continuous casting end electromagnetic agitation control system as claimed in claim 1, it is characterised in that described PLC is controlled
It is connected by Profibus-DP cable between device processed and converter.
4. a kind of round billet continuous casting end electromagnetic agitation control system as claimed in claim 3, it is characterised in that described PLC is controlled
Device processed uses Siemens s7-300 series of PLC, major control be output as the startup of converter, stopping, rotating, failure reset,
Electric current and frequency setting, the quantity of described converter is four, and four converters are referred to as " casting stream for four ", and four casting streams use same
One PLC is controlled.
5. a kind of round billet continuous casting end electromagnetic agitation control system as claimed in claim 4, it is characterised in that described converter
Using peace river H1000 Series Frequency Converter, the operating frequency of converter is 3-8Hz, and the stir current of generation is 400/500/550/
Any one in 600/700A.
6. a kind of round billet continuous casting end electromagnetic agitation control system as claimed in claim 5, it is characterised in that described electromagnetism stirs
Mix device and use rotary electric magnetic stirrer.
7. a kind of round billet continuous casting end electromagnetic agitation control system as claimed in claim 6, it is characterised in that described electromagnetism stirs
Mix device and use the V/F control mode without PG.
8. a kind of round billet continuous casting end electromagnetic agitation control system as claimed in claim 7, it is characterised in that described industrial computer
Monitored picture use Siemens wincc picture, it by ethernet communication PLC is carried out data acquisition and operation is controlled
System.
9. one kind utilizes the round billet continuous casting end electromagnetic agitation control system as described in any one of claim 1-8 to carry out electric current point
The method that peak eliminates, it is characterised in that choose the self-defined V/F characteristic curve of magnetic stirrer, by the electricity in magnetic stirrer
Magnetic coil operating frequency is set in 5HZ, carries out the rotating forward of 5 seconds, 2 seconds stop and 5 seconds with the stir current of 700A
Reversion, the most repeatedly runs, carries out self-defined to E1-01 to the E1-13 parameter of converter E1 group parameter, and utilize converter
DC injection braking function initiates braking frequency to the B2-01 of converter DC injection braking B2 parameter group, B2-02 stalling current, B2-04 stop
Only braking time is optimized, and completely eliminates this spike.
10. one kind utilizes the round billet continuous casting end electromagnetic agitation control system as described in any one of claim 1-8 to carry out effectively
The method that the magnetic field retention time controls, it is characterised in that choose any V/F characteristic curve of magnetic stirrer, by electromagnetic agitation
Solenoid operating frequency in device is set in 4HZ, carries out the rotating forward of 5 seconds with the stir current of 600A, the stopping of 2 seconds and
The reversion of 5 seconds, runs the most repeatedly, is analyzed in the E1 group parameter of converter, the magnetic stirrer of associated ideal
The V/F characteristic curve of running current curve and motor itself is corresponding to the E1-09 frequency parameter in converter E1 group parameter
E1-10 voltage parameter and magnetic stirrer self-defining V/F performance plot in front four points of curve be optimized tune
Whole, on the premise of preventing agitator starting current the most excessive, finally realize the running current curve of magnetic stirrer with preferable
The matched of current curve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610587200.0A CN106077548A (en) | 2016-07-25 | 2016-07-25 | A kind of round billet continuous casting end electromagnetic agitation control system |
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|---|---|---|---|
| CN201610587200.0A CN106077548A (en) | 2016-07-25 | 2016-07-25 | A kind of round billet continuous casting end electromagnetic agitation control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583676A (en) * | 2016-12-29 | 2017-04-26 | 江苏沙钢集团淮钢特钢股份有限公司 | Carbon segregation control method for continuous casting round billet for vehicle wheel |
| CN108723319A (en) * | 2018-07-04 | 2018-11-02 | 湖南科美达电气股份有限公司 | A kind of liquid steel water electromagnetic agitation method |
| CN108907125A (en) * | 2018-07-04 | 2018-11-30 | 湖南科美达电气股份有限公司 | It is a kind of for stirring the electromagnetic stirring system of molten steel |
| CN110605366A (en) * | 2019-10-25 | 2019-12-24 | 北京科技大学 | Multi-section linkage type continuous casting magnetic stirring system controlled by time-space function and method thereof |
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