To Next Page

To Previous Page

—————— Instruction manual ——————

123

5.3.5.2 Self tuning of the speed regulator

Speed Self tuningidentiesthetotalInertiavalueatthemotorshaft(Kg*m

2

),thefrictionvalue(orLosscom-

pensation)inN*mandcomputestheProportionalandIntegralgainsofthespeedregulator.

Warning ! Thisprocedurerequiresfreerotationofthemotorshaftcoupledtotheload.Start/Stopcom-

mandisdisregarded,thereforeitcannotbeusedondriveswithlimitedtravel.

Caution ! ThetestisperformedusingthetorquelimitvaluesetinTest T curr limparameter.Thetorque

isappliedstepwise,withnoramp(prole),thereforethemechanicaltransmissionmustnot

havesignicantbacklash,anditmustbecompatiblewithoperationatthetorquelimitset

in Test T curr limparameter.Theusercanreducethetorquelimittoasuitablevaluevia

theTestTcurrlimparameter.

note ! - Applicationwherethesysteminertiacoupledtothemotorshaftismuchhigherthan 

 themotorinertiavalue,increasetheTest T curr limparametertoavoid“Timeout”error.

- Thisprocedureisnotsuitableforusewith“hoist”or“elevator”drives.

PreliminaryoperationbeforethecorrectexecutionoftheSpeedselftuningprocedureistheappropriatecalcula-

tionoftheTorque constparameter.

Setthemotornameplatedataparametrs:

Motor max speed Setthemaximummotorspeedvalue

Flux weak speed Motor max speed percentagewheretheuxweakeningrangestarts.(Crossoverpoint)

T Current limit +/- Setthenominalmotorcurrentvalue

Motor nom ux SettheMotornomuxinAmps.

Max out voltage Setthemaximumarmaturevoltagevalue

Withspeedregulatorselftunigperformed,theaboveparametersvaluecanbechangedaccordingtotheapplica-

tionwithoutTorque constparametermodication.

- Setthemotorshaftdirection:ForwardorReverseviatheFwd-Rev spd tuneparameter

- SelectthetorquecurrentvaluetobeusedduringthetestviatheTest T curr limparameter

TO EXECUTE SELF TUNING,enterSTARTUP\Selftuningmenu.

- Startexecutionbyentering“Start”.

TheprocedureperformsanaccelerationtestatthetorquelimitvaluesetinTest T curr lim parameteruptoa

speedthreshold,thenadecelerationtestwithnotorqueapplied(coasting)downtozerospeed.

Thespeedthresholdis33%ofthelowestinthefollowing:

- Speed base value

- Speed max pos or Speed max neg accordingtodirectionofrotation.

Theproceduremaytakeafewminutes,dependingoninertiaandfrictionvalues.

Basedoninertiaandfrictionvalues,thedrivewillcalculatethespeedloopgains(Speed PandSpeed Ipa-

rameters).

Ifmanualadjustmentarerequired(incaseofvibrations,etc.)theseshouldbeappliedtotheintegralgainSpeed I

[%].Incaseself-tuningofspeedregulatorisnotsatisfactory,refertomanualtuningprocedureinsection5.3.6.

gefran TPD32-EV-500 series User Manual

Questions and Answers: