一种新型径向磁浮轴承结构设计与磁场计算

471Vol.47No.120072TelecommunicationEngineeringFeb.2007:1001-893X(2007)01-0043-0531,1,2(1.,610031;2.,610031):,,,,,,,,,ANSYS,,,,,,:;;;;ANSYS:TH133.3:AStructureDesignandMagneticFieldCalculationofaNovelRadialMagneticBearingJIANGQi-long1,LIANJi-san1,YUEDe-kun2(1.ElectricalEngineeringCollege,SouthwestJiaotongUniversity,Chengdu610031,China;2.ChengduElectromechanicalCollege,Chengdu610031,China)Abstract:Intraditionalradialactivemagneticbearing(AMB),thecontrolprecisionanddynamicrespon2sesofrotorareaffectedbythecouplingbetweenthemagnetsbecauseofitsinterlinkedmagneticcircuit.AnovelstructureofradialAMBisproposedinthispapertoeliminatethiscouplingandtoshortenthelengthofmagneticcircuit.Furthermore,theeddycurrentintherotorisproducedtochangetheair-gapmagneticfieldforthechangeofpolarityofmagneticfieldwhiletherotorisrotated.AnalysisandcalculationstothetestAMBmotorareperformedwithANSYSsoftware.Theresultsshoweddyfieldiscentralizedtotherearfringeofmagneticpoleandrotorsurfacewithrotationspeedincreasing.Theattractiveforcedecreasesandmagneticdragforceincreases.Soarotormaterialwithhighmagneticpermeabilityandlowconductivityisselectedintheapplication.Keywords:magneticbearing;magnet;magneticfieldcalculation;structuredesign;ANSYSsoftware,18,2,4,,NSSNNSNS[1]343:2006-10-30;:2006-12-28:211(M0199919950130)©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[2];,38,xy,,,,,381,,0.011mm,,,,:,,,,,4,5,,418,30%,10%,5%,,,188(kg)6.726.08(kg)19.4512.79(kg)-1.21(kg)26.1720.08()0.480.44(mm)172.47166.744©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:1.0mm,200,5.0A,0.44,1.35mH,38mm,28.4mm,188mm,60mm,39.5mm2.18,ANSYS/Emag,(,)(,),56:,,,,8,7567,,,2.2,,,,,+B0(N)-B0(S),,,,,8(a)1500r/min54©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(),[36],,,,:;;;+B0-B0-B0+B0,,,,,9,(,v=R,,R)9-:J=(E+vB)(1)ýE=0(2)J=ý(B/)(3)[3]FattFb:Fatt=2RL0n=1Cn…CnDnŠDnqn€qn-2rk2n2rk2n(4)Fb=2RL0n=1Cn…CnDnŠDnqn€qnrkn(5):kn=n/R,qn=k2n+iknv,cnDn:Cn=i4Jm-12+(-1)msinm4cosm4,n=2m0,n2m,m=1,3,5,Dn=cosh(kn)+qnrknsinh(kn):J;v;E;B;;=r0;L;R;64©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(4)(5),101110111011,n=0,,,,,,,,,,,,-,,3,,,,,,,,,,,:[1],,,.[J].,1997,(12):100-105.[2].[J].,2004,(6):30-32.[3],.[J].,2002,(2):116-120.[4],,.-[J].,2003,(1):124-129.[5]UeyamaH,Fujimoto,Y.IronLossesandWindyLossesofHighRotationalSpeedRotorSuspendedbyMagneticBearings[C].2ndInt.SymposiumonMagneticBear2ings.Tokyo,1990.[6]AhrensM,KuceraL.AnalyticalCalculationofFields,ForcesandLossesofaRadialMagneticBearingwitharo-tatingRotorConsideringEddyCurrents[C].5th.Int.SymposiumonMagneticBearings.Kanazawa,1996.:(1969-),,,,19954,,,()[e-mail]74©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.