gefran TPD32-EV-...-4B - Torque Winder Function

—————— Instruction manual ——————
321
6.17 TORQUE WINDER FUNCTION
ThecenterwindfunctioninsidetheTPD32-EVconvertersisusedtocontrolwindersandunwinderswhoseten-
sionregulationiscarriedoutviaanopenorclosedloopcontrol.
Apartfromcalculationfunctionsfortorque,diameter,compensationandTapertension,thesystemforeseesthe
calculationofthemotorspeedreference.Suchfunctionallowstousethedriveonthefourregulationquadrants
controllingbothwindersandunwinders,andtocontrolthemotorwithaperipheralspeedproportionaltothe
diameterincaseofabreakofthewoundmaterial.
Thetorqueisadjustedaccordingtothemotorux,thusmeaningthatthesystemissuitabletocontrolmotors
withaconstanttorque-powerratio.
Theclosedloopregulationforeseesananaloginputfortheloadingcell0…10V,0…20mA,4…20mA.
Theoutputofthecenterwindfunctionissentdirectlytothecurrentlimits;thespecicparametersTcurrentlim
+/-andthelimitssetbytheprogrammableoverloadfunctionareanywayactiveinordertoprotectboththein-
verterandthemotor;amongthethreepossiblesettingstheonewiththelowestvalueisalwaysthemostimportant.
Input / Output
Line spd source Linespeedsamplingparameter.Itisusedexclusivelyforthediametercalculation.The
speedthreshold,Ref speed thr,underwhichthecalculationprocedureisblocked,refers
to Ref line speed.Itcanbeprogrammedasanaloginputorencoderinput.
Ref spd source Linereferencesamplingparameter.Itisusedexclusivelyforthecalculationof:
 -theinertiacompensations
 -thelinespeedreference.
 Itcanbeprogrammedasanaloginputorencoderinput.
Analog inputs
Tension ref Percenttensionreference;10V(20mA)=100%.
Tension red PercentdecreaseintheTapertension;10V(20mA)=100%.
Diam preset 3 Settingofthestartingdiameter;10V(20mA)=max.diameter.
Analog outputs
Roll diameter Presentdiameter;10V=max.diameter.
Act tension ref TensionreferencedecreasedbytheTaperpercentage;10V=100%Tensionref.
Torque current Requestfortorquecurrent;5V=drivesize.
W reference Referenceforangularspeed,10V=100%Baseomega.
Actual comp Activecompensationmonitor(itsumsupstatic,dynamicandinertialfrictions);5V=
drivesize.
Digital inputs
Torque winder En Enablingofthecenterwindfunction.
Diam calc Dis Enablingofthediametercalculation.
Diam inc/dec En Ifenabledandifwinder,thecalculateddiametercanneverdecrease;ifunwinderthe
calculateddiametercanneverincrease.Itisusedtoimprovethesystemstability.
Wind/unwind Winder/unwinderselection:0=winder,1=unwinder.
Winder side Selectionofthewinding/unwindingside:0=up,1=down
Diam preset sel 0 LSDdigitalinput;preselectionofthestartingdiameter.