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ID:35613364
大小:113.50 KB
页数:5页
时间:2019-04-01
《QCT424-99标准(英文版)》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、.IntroductiontotheChangeofStandardCodeAccordingtotherequirementofZJJJBH[1998]No.216documentofChinaStateBureauofQuality&TechnicalSupervisionaswellasGJG[1999]No.126replyofStateBureauofMachineBuildingIndustry,theoriginalstandardcodeZBT36010-89ischangedastheindustrialstan
2、dardcodeQC/T424-1999,withthecontentkeepingthesametemporarily.Pleaseusethenewstandardcodeinreference.SpecializedStandardofPRCTestMethodsforElectricalCharacteristicofAutomobileAlternatorZBT36010-891SubjectContentandApplicableScopeThisstandarddefinesthetestmethodsandgene
3、ralrequirementfortheelectricalcharacteristicsofautomobilealternator(referredtoas“generator”forshorthereinafter).Thisstandardappliestoautomobilealternator(whosecoolingmethodisspecifiedbythegeneratormanufactory).2TermsandCode2.1TestVoltageUt(V)Itisthespecifiedvoltageval
4、uewhentestingtheoutputcurrent.2.2Cut-inSpeednA(r/min)Itreferstothegeneratorspeedwhenthegeneratorbeginstooutputcurrentforthefirsttime;thisspeeddependsonthepre-excitationpower(input),speedchangerate,batteryvoltageandresidualfluxdensityinrotor.2.3Zero-ampSpeedno(r/min)It
5、isthespeedwhenthegeneratorvoltagehasreachedthespecifiedtestvoltageUtbutthereisnocurrentoutput.(Inthecurrent-speedcharacteristiccurveI=f(n),thepointmeetsthex-coordinate.2.4MinimumApplicationSpeednL(r/min)Thestandardspecifiesthisspeedis1,500r/min,whichequalstothegenerat
6、orspeedwhentheengineisatidlespeed.2.5RatedSpeednR(r/min)ItisthespeedwhenthegeneratoroutputsratedcurrentIR.Thespeedisspecifiedbytheproductstandard.2.6MinimumApplicationCurrentIL(A)ItisthecurrentoutputofgeneratorunderthetestvoltageUtandwiththespeednL=1,500r/min.2.7Rated
7、CurrentIR(A)ItistheminimumcurrentoutputofthegeneratorunderthetestvoltageUtandwiththeratedspeednR(theratedcurrentvalueisspecifiedbythegeneratormanufactory,andshallbemarkedonthenameplateofgenerator).2.8MaximumCurrentImax(A)Itisthecurrentoutputofgeneratorunderthetestvolt
8、ageUtandwiththemaximumcontinuousspeednmax(thespeedisspecifiedbythegeneratormanufactory).3ElectricalCharacteristicTest3.1Curr
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