三相感應(yīng)電動機綜合保護裝置研制.pdf

1、重慶大學(xué)碩士學(xué)位論文三相感應(yīng)電動機綜合保護裝置研制姓名：周文勇申請學(xué)位級別：碩士專業(yè)：電氣工程指導(dǎo)教師：廖勇胡金榮2002.10.1重慶大學(xué)1二程碩士論文英文摘要ABSTRACTWimthedevelopmentofelectronicsandmicrocomputermicroprocessorbasedprotectionhasadvancedButmuchofthanalejusttherepublicationoftheelec

2、tromechanicalandelectronicprotectionManyadvantagesofthecomputersuch韶nunericalevaluationdatastorageandlogicaldecision，isntusedAndmostofthemicroprocessorbasedprotectionisrunningisolatedThereislittledataexchangewithoutsideI

3、t’sanewdomainhowconnectmotorswithnetworkeconomicallyandreliablyandexertsitsabilitytoanalysisthedataTherearemanytriesinthispaperontheseaspectsTllispaperstudiedthebasicprincipleoftheasynchronousmotordeeplyanalysesthefaults

4、andeducedthewaystoobtainthefailurecharacteristicsBepAluseoftheseparatbetweentheprotectionandthemonitoringtherearemanydisadvantagesinavoidingthefailuerTIlispaperdesignedasystemtocombinetheadvantagesoftheprotectionandthemo

5、nitoringinsoftwareandhardwareTllisthesisanalyzesfailurecharacteristicsoftheinductionmotorsystematicallyAsimpleandeasyoperatingcriterionisputforwardinaccordancewiththerelationbetweenpositivesequencecomponentandnegativeseq

6、uencecomponentofstatorcurrentwhenthemotorisinunbalanceandsinglephasebrokenBasedoll∞alyzingthetraditionalinversetimelagoverloadingprotectionofmotors，aninversetimelagoperatingequationwithaccumulatingsuitorcurrentisachieved

7、，accordingtothedifferentialequationoftheheatingandcoolingwhilethecurrentflowsintotheconductorThentheequationisnlmlersimplifiedtoFecunl∞ceformulawhichrepresentsthethermalconditionoftheinductionmotorreallyendreflectsthatth

8、ehigheltemperaturerises，themomrapidlythemotorcoolsInordertoconsiderthediffemmheatingofpositivasequenceeurmntandnegativesequencecurrantofthemotorstatorgenerallytheequivalenteun∞tisadoptedinsteadofthetraditionalphasecun鋤LT

9、hewayhowtogatherpositivesequencecurrentandnegativesequencecurrentisbmughtforwardandthenx舶n孫∞Fourieralgorithmisadoptedtocalculatetheeffectivevalueofcurrentandvoltagetheeffectivevalueofpositivasequenceclmentandnegativesequ

10、encecRrrolth1thisthesis，accordingtotheprotectionprojectsofvarinusmotorfailure，thesof=【3valeandhardwareforthecontrolsystemisdesignedandtheInterferenceproblemissolvedAnewdigitalandmultifunctioualprotectiondeviceforinductio

11、nmotorwhichtakesadvantageofthe80C196KCsinglechipmicrocomputerasthekeycomponentand璐e8theMAXl97conversionchipintheA／DconversioncangatherendplDo鷦sdatacenlrols)HachronouslyprotectdisplayandwarnautomaticallyKeywords：synchrono