I电动机智能软启动控制系统设计摘要：本课题研究的是异步电动机的控制系统，它凭借着简洁的构造、便于维修、造价低的特点，被普遍的应用在生产生活当中，为机械设备提供动力。对于电动机的启动，常见的有直接启动和降压启动着两种方法，然而这两种方法有着种种缺点，如冲击电流大、影响周围设备等。但是伴随着软启动技术以及变频器技术的发展，这些缺点被一一改善，软启动和变频器启动渐渐代替了原有的启动方式。在本次设计的电动机软启动智能控制系统当中，使用PLC作为系统的智能控制中心，对变频器进行控制，对系统做出监控，将启动控制集中化，使操作人员的更加便利的操作系统，实现现场工艺。而变频器的应用，也有巨大的优势，它可以根据现场的需求，通过改变输出功率来调控电动机的转速，使现场更加的人性化。本次的设计方案解决了电动机启动时产生的冲击电流对电网的影响，保护了周围用电设备。并且根据PLC编程简单、方便的特性，可以随时将新的设备加入到系统中，实现统一控制。关键词：电动机；软启动；变频器；可编程控制器（PLC）IITheintelligenceofthemotorsoftstartcontrolsystemdesignAbstract:Thistopicistheresearchofasynchronousmotorcontrolsystem,itissimplestructure,easymaintenance,lowcostcharacteristics,iswidelyusedinproductionandlife,providingpowerformechanicalequipment.Formotorstart,therearetwocommonmethodsofdirectstartandbuckstart,however,thesetwomethodshavemanydisadvantages,suchashighimpactcurrent,affectingthesurroundingequipment,etc..However,withthedevelopmentofsoftstarttechnologyandFrequencyconvertertechnology,theseshortcomingshavebeenimprovedonebyone.Softstartandfrequencyconverterstartgraduallyreplacetheoriginalstart-upmode.Themotorsoftstartintelligentcontrolsystemofthisdesign,theuseofPLCastheintelligentcontrolsystem,usedtocontrolthefrequencyconverter,tomonitorthesystemwillstartcontrolcentralized,maketheoperatormoreconvenientoperatingsystem,toachieveon-siteprocess.Andtheapplicationoffrequencyconverteralsohasgreatadvantages.Itcanadjustthespeedofmotoraccordingtothedemandofthefield,changetheoutputpower,andmakethescenemorehumanized.Thedesignsolvestheimpactoftheimpactcurrentonthepowergridwhenthemotorstarts,andprotectsthesurroundingpowerequipment.AndaccordingtothesimpleandconvenientcharacteristicsofPLCprogramming,newequipmentcanbeaddedtothesystematanytimetoachieveunifiedcontrol.Keywords:Motor;softstart;frequencyconverter;PLC1目录摘要.......................................................................................................................................................................IAbstract:.............................................................................................................................................................II第1章绪论.........................................................................................................................................................31.1引言.......................................................................................................................................................31.2系统设计的来源...................................................................................................................................31.3系统设计的要求...................................................................................................................................31.4电动机智能软启动控制设计的研究背景.............................................................................................31.5PLC控制的电动机启动系统的发展与现状...
