gefran TPD32-EV-...-4B - Manual Tuning of the Regulators; Manual Tuning of Speed Regulator; Using the Test Generator

—————— TPD32-EV ——————
126
5.3.6 Manual tuning of the regulators
ThetuningoftheTPD32-EVconvertersisfactorysettoatypicalvalueforthemotorsizeconcerned.Thisnor-
mallyensuressatisfactoryregulatorresults.Ifthissetting,however,meetstherequirementsoftheapplication
concerned,theregulatorneednotbeoptimized.
Theconvertercontainsthefollowingclose-loopcontrolcircuits:
- Regulatorofthearmaturecurrent.TheautotuninghastobeperformviatheR&L Searchparameter.
- Speedregulator
- Fieldcurrentregulator
- Armaturevoltageregulator
Followingisadescriptionofthesystemsuitabletoobtaintheoptimization,ifnecessary.Inordertohaveastep
function,theinternal“Testgenerator”isused(“SPECFUNCTIONS”menu).Theaimistoobtainaverygood
stepresponse.
Theanalogoutputcanbebroughtbacktotheterminalstrip,withasamplingtimeof2ms.
Using the Test generator
Thisfunctiongeneratesandmakesavailablesomesignalswithasquarewave,withafrequencyandawidththat
canbesetandwhichcanbeaddedtoanoffsetthatcanbesettoo.WiththeparameterGen accessitispossible
tostateonwhichregulatorinputthesignalmustbeactive.Furtherinformationcanbefoundinsection6.15.1,
“Testgenerator”.
Manual tuning of speed regulator
- Novoltageonterminal12(Drivedisabled)
- ChoosethefollowingsettingsfortheTestgenerator:
- Gen access  = Rampref
- Gen frequency  = 0.2Hz
- Gen amplitude  = 10%
- Gen offset  = 10%
- Measuringthereactiononananalogoutput.Tothispurpose“Actual Spd” and“Motor current”variables
mustbesetontwodifferentanalogoutputs(see“Programminginputs/outputs”).
- IntheSTARTUPmenusetthe Acc delta speedparameterwiththehighestvalueandtheAcc delta time
parameterat1second.
- Setat0.00theSpeed P andSpeed I parametersintheREGPARAMETERS/...menu.
- Enablethedrive(voltageonterminal12)andStart(voltageonterminal13).
- IncreasetheSpeed P tillwhentheovershootislowerby4%whenthereactiontimeisshorter.
- IncreaseSpeed I untiltheovershootishigherby4%.Decreaseit,sothatitisslightlylowerthan4%.
- Stopanddisablethedrive(removethevoltageonterminal12and13).
- Gen access=Notconnected
- Savethesettings(SAVEPARAMETERScommandintheSPECIALFUNCTIONmenu).
note!  Withthefeedback“Bypass”functionenabled(Enable fbk bypas=Enabled)theconverter
switchdirectlytothearmaturefeedback(CEMF)whenthespeedfeedbackisnomorepresent.
Thisispossiblewhentheconverterisworkingatconstanteld.Inthiscasewithadiscon-
nectedreactionsignal,itisnecessarytocarryoutagaintheabovementionedoptimization
ofthespeedregulator.ThePsectionofthespeedregulatorissetviatheSpeed P bypass
parameterandtheIsectionwiththeSpeed I bypassparameter.