gefran TPD32-EV-500 series - Motors, Encoder, Tachometer; Motors

—————— TPD32-EV ——————
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2.6 MOTORS, ENCODER, TACHOMETER
TheconvertersoftheTPD32-EVseriesareprovidedfortheregulationofDCmotorswithanindependentexci-
tation.Asforspeedfeedbackthereistheuseofasinusoidalincrementalencoder,adigitalencoderorananalog
tachometergenerator.Incaseoflimitedprecisionneedsitispossibletouseasfeedbackthearmaturevoltage
withoutdeuxing.
2.6.1 Motors
Theelectricalandmechanicaldataofthedcmotorswithanindependentexcitationrefertoaparticularfunction-
ingeld.Thefollowingpointshavetobetakenintoconsiderationinordertooperatethesemotors:
Motor data necessary to connect it to a converter
Thedataonthemotornameplate:
- Armatureratedvoltage
- Armatureratedcurrent
- Fieldratedcurrent
- Motorratedspeed
Motor protection
Thermo relay of the motor
- Placedabovetheconverter:dimensioningI
dN
•0.82•1.05
- Therelaycontactcanstopthedrivethroughacontrolcircuitoritcansignaltotheconverterasanexternal
failure(terminal15).
note!  Rememberthatwithathermorelayitispossibleonlytocontroltheheatingofthemotordue
toanoverload,butnottheoneduetoaninsufcientventilation.ForthispurposesomePTC
thermistorsorthermalswitchesshouldbeinsertedinthemotorwindings.
Thermistors and thermal switches
Onterminals78and79itispossibletoconnectathermistororthermalswitchinordertodetectmotoroverheat-
ing.Whennotemperaturesensorsarepresentanexternalresistor(R=1kohm)hastobeconnectedtothese
terminals.Theconnectionofthesensorhastobedoneaccordingthefollowinginstructions.
Thermistors (PTC)
PTCthermistorsaccordingtoDIN44081or44082ttedinthemotorcanbeconnecteddirectlytotheconvertervie
terminals78and79.Inthiscasetheresistor(1kohm)mountedbetweentheterminals78,79hastoberemoved.
Thermal switches (klixons) in the motor windings
Temperature-dependentcontacts“klixon”typecandisconnectthedriveviatheexternalcontrolorcanbereported
asanexternalerrorontheconverter(terminal15).Theycanalsobeconnectedtotheterminals78and79in
ordertohaveaspecicerrorsignal.Inthiscaseremovethe1kohmresistorfromtheseterminalsandconnect
itinseriestothewiring.
Limitation of the converter current
Thecurrentlimitationcanprotectthemotorfromunwantedoverloads.Tothispurposeitisnecessarytoset
thecurrentlimitationandthecontrolfunctionoftheconverteroverload(overloadfunction),sothatthecurrent
remainswithinthevaluesallowedforthemotor.
note!  Rememberthatwithacurrentlimitationitispossibletocontrolonlythemotorheatingdue
toanoverload,butnottheoneduetoaninsufcientventilation.ForthispurposesomePTC
thermistorsorthermalswitchesshouldbeinsertedinthemotorwindings.