智能无弧交流接触器毕业设计论文

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1、湖南工程学院应用技术学院毕业设计说明书题目：智能无弧交流接触器专业班级：电气工程及自动化1285学生姓名：朱斌浩学号：1完成日期：2016年5月8日指导教师：赵毅君（教授）评阅教师：施晓蓉（副教授）2016年5月摘要因为交流接触器在使用过程中通，断的频繁过程，会产生电弧，从而影响接触器的使用寿命。研发智能无弧交流接触器是当前的趋势。AbstractACcontactorplayedanirreplaceableroleinthefieldoflow-voltagedistributionandautomati

2、oncontrol.Soconsistency of performance oftheACcontactorhasgreateconomicsignificance.Butfurtherdevelopmenthassofarbeenconstrainedbyitselectricallifewhichbelowthemechanicallife’slevel.Thedirecteffectonelectricallifeiselectricarcthathasproducedinswitchingproce

3、ss.EspeciallyundertheuseofcategoriesofAC-4,thearcgeneratingbyswitchingprocessbecomethekeyrestrictionoftheelectricallifeoftheACcontactor.Inviewoftheaboveproblems,thispaperputforwardaresearchplanaboutintelligentLowvoltageAccontactorwithoutarc.Astotheproblemsi

4、ntheclosingandbreakingprocess,wemaketheintelligentimprovementtosolvethem.Theimprovementincludestwoaspects.oneaspectistheimprovementofelectromagneticsystem.thispaperdesignsthecorrespondingexperimentalcircuitusedtodeterminethespecificfieldparameterswhichmainl

5、yabouttheDCexcitationvoltageandDCsmallvoltage.Andthedesignoftheintelligentexcitationoperationoftheactuatortherebyensuresthestabilityoftheexcitationprocess.Theotheraspectisintelligenttransformationaccordingtothecontactsystem.Astothis,thetheoriesmainlydivided

6、intozerocurrentbreakingandcontactlessbreaking,thispaperadoptsthecontactlessbreakingconcept.ThespecificapproachisineachphaseofcontactendsconnectinparallelwithaBidirectionalTriodeThyristor,andsupportingthecorrespondingdesignofdrivecircuitandtriggercircuit.Thi

7、smakesBidirectionalTriodeThyristorrealizeshuntinACcontactoron-offprocess,namelyBidirectionalTriodeThyristorbearsthemaincircuitcurrentsignalbeforetheon-offprocess.SoitcanmakeACcontactortoachievearc-lessclosingoperation,Thegreatlyimprovestheelectricallifeofth

8、econtactor.InadditiontoACcontactorswitchprocess,thispaperalsofocusonotheraspectsofintelligenttransformofACcontactor,mainlyprovidesovervoltage,undervoltage,overload,leakageprotectionfunction.Astothisint