gefran TPD32-EV-...-4B - A2.5 External Three-Phase Field Exciter Control

—————— Instruction manual ——————
493
A2.5 External Three-phase Field Exciter Control
CONFIGURATION
[...] ....
[1522] EnextdigitFC
[914] CUENFluxfact
Parameter No. Format
Value Access via
min max Factory Keyp.
RS485/
BUS/
Opt2-M
Term.
Opt2-A/
PDC
CONFIGURATION
EnextdigitFC
1522 I16 0 1 0
ü
R/Z - -
CUENFluxfact[%]
914 U16 10 100 50
ü
R/Z - -
En ext digit FC Withthisfunction,enablingEn ext digit FC andtheFlux reg mode (IPA469)parameter
canbesettoExt digital FCtousethedriveinthe"FC"conguration(viaberoptics)
tocontroltheexcitationcircuitoflargeDCmotors.
CU EN Flux fact Inordertoavoidpossiblearmaturespikescurrentduringbridgereversing,thisvalue(in
percentageofeldcurrent)denesathresholdforactivatingarmaturecurrentduring
thereverse.
CommunicationbetweentheTPD32-EVarmaturecontroldrive(master)andtheTPD32-EV-FCdrive(slave)
shouldbeviaopticalbreserialinterface(PAR469Flux reg mode=[3]Ext digital FC)or(fromTPD32-EV
FW11.XX,version)bystandardexternalI/Oterninalconnection(PAR469Flux reg mode=[4]Ext wired FC).
Inthisoperatingmode,the-FCslavedriveactsasanactuatorofacurrentreferencefromthemastercontrolunit.
Themastercontrolunitprovidestheuxreference(voltageregulatoroutput)which,appropriatelyscaledand
senttothecurrentreferenceofthe-FCslavedrive,enablesthistocontrolthecurrentofthethree-phasebridge
ofthedriveconnectedtothemotorexcitationcircuit(inboththeconstanttorqueandconstantpowerareas)
Dynamiccontroloffour-quadrantsystemsisalsopossiblewithatwo-quadrantpowerandcontrolcircuit(in
the2B+econguration)connectedtothearmature:thisisdonebyinvertingthepolarityoftheexcitationcircuit
currentconnectedtoafour-quadrantbridge.
Inthiscongurationtheslavedriveworksintorqueregulationmodewiththereferencecontrolledbythemaster:
thedrivesizeand,aboveall,thevalueofFull load current(IPA179)mustthereforebeselectedaccordingto
thecurrentrequiredbytheexcitationcircuit.
Thesignofthemasterspeedregulatoroutputmanagesthepolarityofthecurrentreferencesenttotheslave:
thisisinvertedwhenthevalueofthespeedregulatoroutputishigherthanthesymmetrichysteresisvalueset
in [1522]FC cur ref hyst.
Thisparametercanbeusedtoavoidcontinuousreversalsofeldcurrentpolaritywhenthemotorisrunning
withnoloadappliedandthuswithaSpeed reg output value thatisalmostnull.
Ifthiscongurationisenabled,the“Fieldloss”controlindicatingtheabsenceofexcitationisactivatedwhen:
• themasterdriveisenabled,
• the-FCslavedriveisnotpoweredornotenabledorinanalarmcondition.
Inthisoperatingmode,thereisnoneedtosettheeldcircuitparameters,apartfromthosetocongureany
voltageregulatorgains(Voltage PIPA493andVoltage I IPA494).
imPortant: ifthisfunctionisenabledwiththe2B+eoption,thedrivecannotbeusedwiththeSpeed fbk
selparameter(IPA414)settoArmature.