Installerar
Vi tillverkar kontrollutrustningar, manöverskåp eller pulpetrar till alla typer av industrier. Tillverkningen sker i egen verkstad.
Serietillverkning eller special
Vi åtar oss serietillverkning av apparatskåp eller specialanpassade lösningar. Vår erfarenhet och flexibilitet gör att ingenting är omöjligt.
Installerar
Vi har även möjlighet att installera elutrustning i containers eller specialbyggda el-utrymmen. I vår verkstad har vi möjlighet att inrymma en fullstor 40-fots container.
Kostnadseffektiv och tidsbesparande lösning
Att leverera elutrustning i containers eller specialbyggda el-utrymmen är både kostnadseffektivt och tidsbesparande då mycket av arbetet som normalt sett sker hos slutkund är klart vid leverans.
Installerar
Vi tillverkar olika typer av ställverk och kraftfördelningsskåp. Tillverkningen sker i egen verkstad.
Kundanpassade lösningar
Ofta tillverkar vi kundanpassade lösningar av ställverk, kraftfördelningar, drivsystem, etc. Självklart kan vi även installera utrustningen på plats och se till att den kommer i drift. Ni har behovet, vi har lösningen.
REMOTE ACCESS is created to simplify speedy maintenance and reduce service/support trips.
REMOTE ACCESS creates a remote desktop connection over mobile GSM network and internet. All that is needed is a Swedish or a foreign SIM card.
REMOTE ACCESS makes it possible to connect to the PLC’s, HMI ’s, drives and computers for troubleshooting, software changes, logging and service.
REMOTE ACCESS is small and flexible 250x250x150 mm box with a weight of about 5 kg.
All configuration with IP addresses, firmware and so on is done from the home office.
Why Koteko REMOTE ACCESS?
The main target of the ECS is to minimize the influence of backup rolls eccentricity disturbance in the product. The ECS is optimized to minimize the periodic disturbance over the entire range of products in varying process conditions viz. different materials, different alloys, different material dimensions meaning different material stiffness.
The main target of the AGC control is to maintain a good thickness tolerance over the entire range of products in varying process conditions undependent of different materials, alloys, dimensions. A system is offered with an adaptive algorithm, different control strategies are available depending on the mill to realize the desired thickness tolerances. All functions necessary for the regulation, control and sequencing of mill actuators to realize the AGC function are provided. The immediate result of the AGC system is that the flat products rolled in the mill are of required thickness and within the required tolerance.
Using hydraulic roll force systems, steelmakers have the ability to control precisely their steel sheet’s gauge (thickness). Using feedback or feed-forward systems, a computer’s gap sensor adjusts the distance between the reduction rolls of the mill. These adjustments prevent the processing of any off-gauge steel sheet.
Roll gap control (RGC)
RGC is keeping the roll gap at its setpoint. By using gap sensors measuring the position of the hydralulc cylinders it is posible to adjusts the distance between the reduction rolls of the mill.
Feed-back (FB)
FB is regulating the exit thickness at its setpoint. Since the exit thickness is measured, some distance after the roll bite this mode is quite slow. The step response is app. 3-6 times the transportation time between roll bite and exit gauge meter.
The FB regulator is a I-regulator where the in signal is the exit gauge meter and the out signal is a gap correction signal to the RGC. The p&i gains are adapted to strip -hardness, and roll speed.
FB is normally correcting for:
Feed-Forward (FF)
FF is correcting for entry strip thickness variations, measured by the entry thickness meter.
The FF regulator using the entry gauge meter and the out signal is a gap correction signal to the RGC. The FF regulator delays the correction signal to be précis in timing due to roll speed and responce time of the RGC.
The gain of the FF regulator adapts to strip –hardness.
FF corrects for variations due to roll eccentricity, speed changes and variations due to offset in the beginning of the strip introduced in previous passes.
Mass-Flow (MF)
MF is acting as a very fast feedback. Instead of using the exit gauge meter it is calculating the exit thickness by measuring the entry speed, exit speed and entry thickness. This means that the thickness is calculated directly in the roll bite.
Exit thickness is then calculated as:
Exit thickness = (entry thickness) * (entry speed) / (exit speed).
The MF regulator is PI-regulator where the in signal is the calculated exit thickness and the out signal is a gap correction signal to the RGC. The p&i gains adapts to strip hardness, and roll speed.
The calculated thickness should adapt to the measured exit thickness using a I-regulator where the in signal is the difference of the calculated and the actual exit thickness. The out signal correct the mass flow calculation.
MF corrects:
Speed Effect (SE)
SE compensates for variations in roll friction due to rolling speed.
The SE regulator is P-regulator where the in signal is the exit speed and the out signal is a gap correction signal to the RGC. The p gains adapts to strip hardness, width, roll force and roll speed. Observe that the p-gain is non-linear due to the parameters mentioned above.
AGC gain
The AGC gain has to be calculated for different strip width, thickness, hardness, roll force and rolling speed. This is done on-line while rolling.
Combinations of AGC modes
Normally the AGC modes are used in combinations.
The most common combinations are:
The Koteko ARCREG Electrode Regulator is based on a software application developed in a Siemens S7 platform in Function Block Diagram – a graphic programming language.
The PLC is controlled through a Siemens HMI panel where all data is entered as well as showing the actual regulation status.
The electrode control is achieved by impedance or constant current regulation based on impedance or current set points. The set points are selected based on tap changer position and series reactor position if applicable.
The system also includes a back pressure regulation if applicable as well as touch down, power demand and high panel temperature logics. A meltdown program for electrical input with 1, 2, 3 and last bucket is also available.
The main functions included in Koteko ARCREG regulation system are:
Open PLC application.
Tar i Drift
Här är kunskap om helheten helt avgörande för snabb idrifttagning av en anläggning.
Vi har Erfarenhet, Kompetens och Förmåga att slutföra projekt effektivt.
Vi arbetar inom många olika branscher och med kunder som har hela världen som arbetsfält. Det har gett oss stor vana av kvalificerat projektarbete, både som lagmedlem och lagledare, i de mest skiftande kulturer och miljöer.
Vår professionella kunskap kombinerad med lyhördhet och ansvarskänsla ställs på sin spets vid starten av en anläggning. Tiden är ofta knapp och inget får gå fel. Koteko har medarbetare som är specialiserade på att driftsätta komplicerade processer.
Vi gör rätt – från den första testkörningen till produktionsstart.
Tar i Drift
Här är kunskap om helheten helt avgörande för snabb idrifttagning av en anläggning.
Erfarenhet och Processkunnande är Nyckeln till Framgång
Vi arbetar inom många olika branscher och med kunder som har hela världen som arbetsfält. Det har gett oss stor vana av kvalificerat projektarbete, både som lagmedlem och lagledare, i de mest skiftande kulturer och miljöer.
Vår professionella kunskap kombinerad med lyhördhet och ansvarskänsla ställs på sin spets vid starten av en anläggning. Tiden är ofta knapp och inget får gå fel. Koteko har medarbetare som är specialiserade på att driftsätta komplicerade processer.
Vi gör rätt – från den första testkörningen till produktionsstart.