gefran TPD32-EV-500 series - Torque Calculation

—————— TPD32-EV ——————
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6.17.2 Torque calculation
Thetorquecalculatorismadeofthreeblocks:
1. Torquecalculationaccordingtothewinder/unwinderrayandtothesettension:C=Txr
2. Calculationofthestatic,dynamicandinertialcompensations
3. IftheTaperfunctionisenabled,thecalculationofthetensioncurveismadeaccordingtotheray.
ThetensionandTaperreductionreferencescanbesentviaananaloginput,seriallineoreldbus.Thecalculation
oftheangularacceleration,necessarytotheinertialcompensations,canbecarriedoutthroughasuitableinternal
functionorbystatingviathreedigitalinputstheacceleration,decelerationandfastdecelerationconditions.
TheconnectiontothePIDfunctionbelongstothecompensationblock.Suchconnectionisnecessarywhena
closedlooptensioncontrolwithloadingcelliscarriedout.
ThecalculationresultissentdirectlytothedrivecurrentlimitsandcanbemonitoredintheparametersIn use
Tcur lim +andIn use Tcur lim –oftheLIMITSmenu.
ThestandardparametersT current lim +/-andthelimitssetbytheprogrammableoverloadfunctionareanyway
activeinordertoprotectboththeinverterandthemotor;thesettingwiththelowestvalueisalwaysthemost
important.Itisalsopossibletosetaspeciccurrentlimitforthecoil“launching”functionduringanautomatic
switching.Theoutcomingtensionvalueandthatofthecalculatedtorquecurrentcanbemonitoredontheanalog
outputs.
OPTIONS
Torque winder
Torque calculat
[1180] Tensionref[%]
[1181] Tensionscale[%]
[1194] Acttensionref[%]
[1193] Torquecurrent[%]
Parameter description No.
Value
Standard
Conguration
min max
Factory
American
Factory
Standard
Tension ref [%]
1180 0.00 199.99 0 0
*
Tension scale [%]
1181 0 200 100 100
Act tension ref [%]
1194 0.00 199.99
Torque current [%]
1193 0.00 200.00
**
* Thisparametercanbesetonaprogrammableanaloginput.
**Thisparametercanbesetonaprogrammableanalogoutput.
Tension ref Percenttensionreference.
Tension scale Scalefactorofthetorquecurrentin%.
 Thisparameterisusedwhenthevalueofthemaximumwindingtorquehastobelimited
orwhenaclosedloopcontrolisusedinordertoadjustthetorquecurrentvaluetothe
realtensiononthematerialmeasuredbytheloadingcell.
 AsfortuningrefertoparagraphApplication example.
Act tension ref Monitorofthe%tensionreferencelesstheTaperpercentagesetviaTension red;ifthe
Taperfunctionisnotenabled,itcorrespondstoTension ref.
Torque current Monitorfortherequirementofthetorquecurrentin%.