汽车电机噪声机理和降噪方法

:2002-03-07,(,430070)AutomobileDynamosNoiseGenerationPrincipleandSomeWaystoCutNoiseDownWUXian-jun,LIZhi-ming(WuhanUniversityofTechnology,HubeiWuhan430070,China):,,,:;;;:TM34:A:1004-7018(2003)01-0014-03Abstract:Adescriptionoftheautomobiledynamosnoisegenerationprincipleisgiveninthispaper.Bytestingthedynamosnoiseandvibration,therelationbetweenthedynamosspeedanditsnoisesspectrumshapeisgiven.Thenseveralmethodstoreducedautomobiledynamosnoiseareputforward.Keywords:dynamo;electromagnetism;noise;vibration1,,,,,,,,0.35mm0.5mm,3624;,612NS;,p,p,:f=pn/60:p;n,r/min2:,,2.1,,,,,,,:Pr=B2(,t)/(20):B;;0,:Pr1=P0+P1:P0=B2/(40)B2/(40),,,,P1=P0cos(2p-21t-20):p;1;0P1,21,2,2(f=pn/30),,,,,:f=iQn/60:i;Q;n,,,,2.2,,,;,,4120031Designandanalysis©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1-d2mD20)n120(1-dmD0)k2zn120(1dmD0)(,)zn120(1-dmD0)1:n;z;D0;dm;k1;k22.2.2,,:f=n/602.2.3,,,kn:f=kn/602.2.4,,:(1),;(2),;(3),,,,(1),;(2)(3),,,,(1000218000r/min),2.3,:f=izn/60,,3,(36,6),1800r/min;3000r/min;6400r/min:(1),1800r/min3000r/min6400r/min,1800r/min36(1080Hz)02000Hz,,;3000r/min36(1800Hz),30(1500Hz),366dB,3000r/min36(,A,A);6400r/min(a)1800r/min(b)3000r/min(c)6400r/min51Designandanalysis©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1280Hz),12(1180Hz),363dB,(3000r/min),(6400r/min);,(2)6400r/min,12,21218(1212)2121812180.037Pa0.03Pa1.20.058Pa0.253Pa0.22.261m/s21.223m/s21.850.074m/s20.083m/s20.89(3),(6400r/min)1112,,,,(4),,,,,4,,,,:(1),,;(2),,,;(3),;(4),,;(5),:,(),:(1),36;(2);(3),,,:[1].[M].:,1989.[2].()[M],:,1976.[3].[J].,1992,(2).[4],.[J].,2001,(2).[5],.[J].,1997,(3).:(1973-),,,(11)round(),mod;Mathcad,M++,,if,otherwise,while,M++,PMSM,3CADMathcad4,PMSM,Mathcad,PMSMPMSM,,,,:[1],.MathCAD2001[M].:,2001.[2].%[M].:,1997.[3]|.[M].:,1990.6120031Designandanalysis©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.