简介:FourbumpersarerequiredfortheinjectionandextractionofCSR.Theparametersofthebumpersareshownintable1.Becauseofthesteepraisingandfallingtimeandthereforetheinductanceofthemagnetshouldbeassmallaspossible,sothematerialofthemagnetcoresmustbeferrite.Andinordertoreducethecostofthebumpmagnet,thecross-sectionofthefourferritecoreswasdesignedasthesame,asshowninFig.1.ItisverysimilartothelaminationoftheH-typedipole.AndFig.2isthe...
简介:MonitoringSystemforSSCMagnetStatus¥YuanYulanThereare320variablesinmonitoringsystemforSSCmagnetstatus,including128variables(hy...
简介:4.GlobalmagnetindustrycentershiftedEuropewastheglobalmagnetscenterbeforeWorldWarⅡ.Afterwards,ithadshiftedtoUSA.Tilllate1960s,thecenterhadmovedtoJapan.Eventually,itmovedtoChinaatthebeginningof21stcentury.Magnetoutputindifferentcountries(2005)isshowninTable3.
简介:ApoolcooledexperimentalmagnetbasedonthecopperstabilizedNbTisuperconductingwirewasdesigned,fabricatedandtested,inordertoevaluatetheengineeringdesignofthedipolesuperconductingmagnetforthecollectorring(CR)ofthefacilityforantiprotonandionresearch(FAIR)project.Inthispaper,theexperimentalsetupincludingquenchprotectionsystemwaspresented.Performanceoftheliquidheliumpoolcooledtestwasintroduced.Alloftheresultsindicateboththeperformanceofconductorandtheexperimentalsuperconductingmagnetunderlowtemperatureisstable,whichsuggeststheengineeringdesignarefeasiblefortheformalmagnetinCRoftheFAIRproject.
简介:Permanentmagnetscapableofreliablyoperatingathightemperaturesupto450?Carerequiredinadvancedpowersystemsforfutureaircrafts,vehicles,andships.ThoseoperatingtemperaturesarefarbeyondthecapabilityofNd–Fe–Bmagnets.PossessinghighCurietemperature,Sm–Cobasedmagnetsarestillveryimportantbecauseoftheirhightemperaturecapability,excellentthermalstability,andbettercorrosionresistance.Theextensiveresearchperformedaroundtheyear2000resultedinanewclassofSm2(Co,Fe,Cu,Zr)17-typemagnetscapableofoperatingathightemperaturesupto550?C.ThispapergivesasystematicreviewofthedevelopmentofSm–Copermanentmagnets,fromthecrystalstructuresandphasediagramstotheintrinsicmagneticproperties.AnemphasisisplacedonSm2(Co,Fe,Cu,Zr)17-typemagnetsforoperationattemperaturesfrom300?Cto550?C.Thethermalstabilityissues,includinginstantaneoustemperaturecoefficientsofmagneticproperties,arediscussedindetail.Thesignificanceofnanograinstructure,nanocrystalline,andnanocompositeSm–Comagnetmaterials,andprospectsoffuturerare-earthpermanentmagnetsarealsogiven.
简介:ThispaperisdevotedtopredictAClossofcableinconduitconductor(CICC)whichisofimportanceinthedesignofconductors.Theconsiderationfortheconductor'sdesignandmainparametersforthemagnetsareintroduced.InordertoattainagoodaccuracyinthecalculationofAClosses,thefielddistributionwithinsuperconductingoutsertshouldbeconsidered.CalculationoftheAClosses,includinghysteresislossesandcouplinglosses,isconducted.Anemphasisisputonthehysteresislossduringtherampupofthecurrenttotheoperationalcurrent(15.3kA)andthecouplinglossoftheconductorinapower-downconditionforinsert.Theresultsareobtainedtobe74.9kJand950Jfor40Thybridmagnets,respectively.Basedonthecalculation,abriefanalysisoflosseseffectontheconductordesignandtheoperationofmagnetisgivenforthepurposethatthecapacityofthecryogenertorcanbeevaluatedandthestabilityregimecanbeimprovedinourfutureworkonthehybridmagnets.
简介:Chinesegovernmentattachesmoreandmoreattentionsonnewenergyvehiclesinrecentyears.Itseemsthatnewenergyvehicles,especiallyhybridvehicles,willreplaceconventionalfuelcarsinthefuture.Permanentmagnetmotorsandhybridcarbatteriesarethemostcrucialcomponentsfornewenergycarsandrareearthmaterialisakeytotheproductionofpermanentmagnetmotorandhybridvehicles.Therefore,it
简介:ThispaperpresentsasimpleandrobustspeedcontrolschemeofPermanentMagnetSynchronousMotor(PMSM).Itistoachieveaccuratecontrolpeffommancemthepresenceofloadtorqueandplantparametervariation.Arobustdisturbancecancellationfeedforwardcontrollerisusedtoestimatethetorquedisturbance.ThesimpleandpracticalcontrolschemeiseasilyimplementedonaPMSMdriverusingaTMS320LF2407DSP.Theeffectivenessoftheproposedrobustspeedcontrolapproachisdemonstratedbysimulationandexperimentalresults.
简介:AccordingtothepreliminarystatisticsofthemagneticmaterialsbranchofAssociationofChinarareearthindustry,therareearthpermanentmagneticmaterialsindustrymaintainedagoodmomentumofdevelopmentfromJanuarytoOctober2018,benefitingfromtherapiddevelopmentofnewenergyvehicles,energy-savinghouseholdappliances,industrialrobotsetc.Theoutputofpermanentmagneticmaterialsgrewsteadilyandtheproportionofhigh-endproductsaccountedfornearly60%.Amongthem,productionofsinteredNdFeBwas129,500tons,ayear-on-yeargrowthof5%.TheoutputsofbondedNdFeBandSmComagnetswere5,500tonsand2,100tonsrespectively,unchangedthanthesameperiodlastyear.
简介:ThearticlewasextractedfromNewMaterialsIndustryRareearthpermanentmagneticmaterialsheadedbySm-CoandNdFeBhavethehighestmagneticpropertyamongallotherpermanentmagneticmaterialstoday.Theyarewidelyusedinmanyfieldsofnationaleconomysuchasinformation&communications,electronics,medicalequipment
简介:OnMarch13th,ReutersreportedthatthelongrunversionofTeslaModel3willusepermanentmagnetmotors.Oneofthematerialsforthistypeofmotorisrareearthmetalneodymium,whichwillfurtherincreasethesupplypressureofneodymium.Governmentsaroundtheworldarecommittedtoreducingtheharmfulemissionsproducedbyfossilfuelcars,pushingupdemandforelectricvehiclesand
简介:为stoichiometric作文的nanocrystallineNd-Fe-B磁铁的demangetization曲线被使用微磁力的有限元素技术计算。曲线,特别iHc随N.The很小的iHc的增加变得更小从一系列沿着不同的地方向的曲线为N=∞接近那。iHc随L的增加增加,并且是什么的靠近的cr一些比小试验性的价值应该是。