Maxaxis4

UserGuideMAXAXVariableSpeedDriveforbrushlessACservomotors1kWto3kWPartNumber0436-0702IssueNumber4SafetyInformationPersonssupervisingandperformingtheelectricalinstallationormaintenanceofaDriveand/oritsexternalOptionUnitmustbesuitablyqualifiedandcompetentintheseduties.TheyshouldbegiventheopportunitytostudyandifnecessarytodiscussthisUserGuidebeforeworkisstarted.ThevoltagespresentintheDriveandexternalOptionUnitsarecapableofinflictingasevereelectricshockandmaybelethal.TheStopfunctionoftheDrivedoesnotremovedangerousvoltagesfromtheterminalsoftheDriveandexternalOptionUnit.ACpowershouldberemovedbeforeanyservicingworkisperformed.Theinstallationinstructionsshouldbeadheredto.Anyquestionsordoubtshouldbereferredtothesupplieroftheequipment.ItistheresponsibilityoftheownerorusertoensurethattheinstallationoftheDriveandexternalOptionUnit,andthewayinwhichtheyareoperatedandmaintainedcomplieswiththerequirementsoftheHealthandSafetyatWorkActintheUnitedKingdomandapplicablelegislationandregulationsandcodesofpracticeintheUKorelsewhere.TheDrivesoftwaremayincorporateanoptionalAuto-startfacility.Inordertopreventtheriskofinjurytopersonnelworkingonornearthemotororitsdrivenequipmentandtopreventpotentialdamagetoequipment,usersandoperators,allnecessaryprecautionsmustbetakenifoperatingtheDriveinthismode.TheStopandStartinputsoftheDriveshouldnotbereliedupontoensuresafetyofpersonnel.IfasafetyhazardcouldexistfromunexpectedstartingoftheDrive,aninterlockshouldbeinstalledtopreventthemotorbeinginadvertentlystarted.GeneralInformationThemanufactureracceptsnoliabilityforanyconsequencesresultingfrominappropriate,negligentorincorrectinstallationoradjustmentoftheoptionaloperatingparametersoftheequipmentorfrommismatchingtheDrivewiththemotor.ThecontentsofthisUserGuidearebelievedtobecorrectatthetimeofprinting.Intheinterestsofacommitmenttoapolicyofcontinuousdevelopmentandimprovement,themanufacturerreservestherighttochangethespecificationoftheproductoritsperformance,orthecontentsoftheUserGuide,withoutnotice.Allrightsreserved.NopartofthisUserGuidemaybereproducedortransmittedinanyformorbyanymeans,electricalormechanicalincludingphotocopying,recordingorbyanyinformationstorageorretrievalsystem,withoutpermissioninwritingfromthepublisher.Copyright©December1995ControlTechniquesDrivesLtdPartNumber:0436–0702IssueCodeMXNU4Contents1Introduction12Functionaldescription33Data44Signalandpowerconnections65Installation106ElectricalInstallation127Commissioning188Diagnostics309Faultfinding3110Specialapplications3211Re-phasingaresolver3612Identifyingmotorphases3713Encodersimulation3814Externalbrakingresistor40MaxAxIssuecode:mxnu411IntroductionMaxAxisaVariableSpeedDrivethatcontrolspermanent-magnetbrushlessmotors.ThreeversionsoftheDrivecoverarangeofpowerratings.PowercircuitsTheDrivetakespowerfromnominal220Vthree-phasebuswhichcanbeobtaineddirectlyorthroughanisolatingtransformer.TheDrivecanbepoweredfromasingle-phasesupplyifaderatingfactorisacceptable.TheoutputoftheDriveisconnectedtoamotoranditsresolver.TheoutputiscontrolledbyaIGBTpowerbridge.Aninternalbrakingresistordissipatesmotorenergyduringregeneration.Tosimplifywiring(especiallyusefulinmulti-axisapplications)powerandsignalconnectorsarelocatedonthefrontpanel.SignalcircuitsInadditiontothesignalconnectorsonthefrontpanel,aconnectoronthebottomoftheDriveallowsconnectiontoback-upencodersimulationcircuits.Thesignalcircuitsareopto-isolatedfromthepowercircuits.DaughterboardsAremovablePersonalitydaughterboardallowstheDrivetobequicklypersonalizedtomeetindividualrequirements.Therearetwotypesofdaughterboard:•BasicPersonalitydaughterboard•OptionsPersonalitydaughterboardMaxAxIssuecode:mxnu42Multi-turntrimmersonthedaughterboardsareusedtoadjustthefollowing:•Proportionalgain•Derivativegain•Acceleration/decelerationrampgradient(formaxspeed)•Speedreferenceoffset•FullscalespeedThetrimmersareaccessiblefromthefrontpanel.DIPswitchesonthedaughterboardsareusedtoadjustthefollowing:•NominalDrivecurrent•Ratedmotorspeed•Numberofmotorpoles(2,4,6or8).•Simulatedencoderresolution•Speedscale•EnablelimitswitchesOntheOptionsdaughterboardarefunctionsformanagingthefollowing:•Limitswitches•EncodersimulationTheseareusedwhentheDriveisconnectedtoapositioningcontroller.Bytransferringthedaughterboard,itispossibletoquicklyequipareplacementDrivewiththesamepersonalityasaDrivethathasbeenremoved.MaxAxIssuecode:mxnu432FunctionaldescriptionTwohigh-performancecontrolloopsareusedtocontrolthemotorspeedandtorque.MotorspeediscomparedwithananalogueSpeedReferenceSpeedReferencesignalfromanexternalcontroller.ThespeederrorsignalisprocessedbyaPID(Proportional,IntegralandDerivative)filtertostabiliseavelocityloop.TheoutputofthisfilteristheCurrentCurrentReferenceReferencesignalwhichcanvarybetween–10Vand+10V.Whenthesignalisatthepositiveornegativelimit,theDrivedeliversmaximumcurrent.AspeedfeedbacksignalissimulatedbytheDriveusingpositioninformationfromaresolvermountedonthemotorshaft.ThenominalcurrentoftheDrivemaybeprogrammedbysettingDIPswitchesinswitchbankSW2.Ifmaximumcurrentisdemandedformorethan2±0.5