交流接触器动态特性测试系统硬件设计及通信分析

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1、ABSTRACTThemeritsofcontactor^performancedependsonthedynamiccharacteristicsofitspull-onandbreak-downprocess,thisprocesswoulddirectlypresentintwoways.oneismovementorbounceofthecorewhichisbelongstotheelectromagneticsystem,theotheroneisthebounceofthecontacts.Thesetwofactorswilldet

2、eminethemechanicallifeandelectricallifeofcontact。匚Therefore^theoperateprocessofcontactortobeanimportantresearchtopic.Inthepast.mostmeasurementsforelectricalandmechanicalparametersofcontactorsarestatic.Inrecentyears^althoughtherehavebeensomekindsoftestdeviceforcontactor,butthey

3、cannotmeettheneedsoftheoptimaldesignofcontactor.Thesearethesituation,difficultiesandbottlenecksofcontactordesign.Withthedevelopmentofmoderndesignmethods.akindofmoreadvancedtestdevicetobeindemand.Thedeviceshouldcontrolthedynamicprocessofcontactorandachievefullrangetestofdynamic

4、characteristics.andprovidedatabaseforthesubsequentdesignofcontacto匚Basedontheserequirements,atestsystemisdesignedforcontactordynamiccharacteristic.Byanalyzingthedynamiccharacteristicsofcontactor'spull-onandbreakdownprocess,suitablemeasurementdeviceswereselectedtoachieveprecis

5、emeasurementofElectricalandmechanicalparameters・Electricalparametersincludevoltageandcurrentofcoil,mechanicalparametersincludedisplacement/bounceofcontactanddisplacement/bounceofcore.Inthissystem,acontrollerwithfunctionofphaseselectionswitchwasdesignedtocloseorbreakcontactorin

6、differentphase,andtheprecisionofphasecanreach1°.Single-chipwasusedascontrolcenterforthecontoller.PowerMOSFETwaschosentobeswitchactuators.RS-485technologywasusedinthetestsystemfordatacommunication.InteractiveinterfacebasedonLabVIEWwasdesigned.andtestresultscoulddisplayedonPCint

7、ime.Afteractualtest,idealtestresultswasachievedbythetestsystem,andthedatawaspreliminaryanalysised・KEYWORDS:ACcontactor;dynamiccharacteristic;laserdisplacementsensor;phaseselection第一章绪论11.1背景及意义11.2国内外关于本课题的研究现状及发展趋势21.2.1研究现状21.2.2发展趋势31.3光电测试技术在交流接触器测试中的应用41.4选相合闸技术在交流接触器控制屮的

8、应用51.4.1选相合闸技术在交流接触器控制中的必要性51.4.2选相合闸技术的发展现状61.5木课题研究的内容和要解决的