简介:Thispaperaimstodesignpunchingdieofthestatorandrotor.Byanalyzingandcomparing,wedeterminethebetterprocessingprogram.Notonlytoensuretheprecisionanddimensionalrequirements,butalsotoimproveefficiency.Throughdetailedanalysisoftheprocess,thispaperdeterminesthestructureoftwocompositemolds.Thedimensionsofitsconvexandconcavedieedgesizeandotherpartsarecalculatedandchecked.Finallythispapercompletesthedesignoftwomolds.
简介:Atime-resolvednumericalcomputationalapproach,involvingthecombustionofdouble-basepropellantisperformedonthermalprotectionmaterialforSRMnozzle.AnimplicitNavier-StokesSolverisselectedtosimulatetwo-dimensionalaxial-symmetricunsteadyturbulentflowofcompressiblefluid.ThegoverningequationsarediscreditedbyusingthefiniteVolumemethod.S-Aturbulencemodelisemployed.CFDschemeisimplementedtoinvestigatethetemperaturedistributioncausesatnozzlethroatinsertscompositematerial.DifferentparametershavebeenselectedfortheanalysistovalidatethetemperaturevariationinthethroatinsertsandbakingmaterialofSRMnozzle.TheadvancedSRMnozzlecompositematerialisalsocharacterizedforthehighthermostabilityandhighthermomechanicalcapabilitiestomakeitmorereliable,simplerandlighter.
简介:Tochangethecurrentphenomenonof'Beinganarmchairstrategist'intheresearchofasteppingmotor,thevirtualsimulationsystemofsteppingmotorwasdevelopedusingvirtualrealitytechnique.Thebasicprincipleofsteppingmotorwasexpounded.Thedevelopmentstrategyofthesimulationsoftwareisintroduced.Somekeyproblemsandtheirsolutions,includingcoordinatetransformationofrotorandorderofon-offelectricityforstator,wereputforwardinsystemdevelopment.Finally,therearethreevirtualsimulationexamplesoftheon-offelectricitywayinthispaper.Thisworkprovidesavaluableauxiliarytoolforthestudyofthesteppingmotor.
简介:Akindofdrivecircuitwhichislowpowerconsumption,high-performanceandhigh-poweroutputforsteppingmotor,basedonBY-5064,andakindofdedicatedcircuitfortwo-phasehybridsteppingmotoraredesigned,drivecontrolforsteppingmotorwithhigh-powerisachieved.