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1、某某学校毕业设计(论文)论文题目:三相异步电动机的PLC控制学生姓名:李某某专业班级:电气自动化指导教师:王某某起止日期:2011.3.5~2011.6.2224摘要PLC在三相异步电动机控制中的应用,与传统的继电器控制相比具有速度快,可靠性高,灵活性强,功能完善等优点。文章首先从异步电机的基本理论及工作特性着手,简单介绍了异步电机的发展近况、基本特性、类型、结构、工作原理及运行特性等。长期以来,PLC始终处于自动化领域的主战场,为各种各样的自动化控制设备提供了非常可靠的控制应用,它能够为自动化控制应用提供安全可靠和比较完善的解决方案,适合于
2、当前工业企业对自动化的需要。本文设计了2个三相异步电动机的PLC控制电路,分别是三相异步电动机的正反转控制和两台电动机顺序起动联锁控制,与传统的继电器控制相比,具有控制速度快、可靠性高、灵活性强等优点,可作为高校学生学习PLC的控制技术的参考,也可作为工业电机的自动控制电路。关键词:PLC;三相异步电动机;继电器24AbstractPLCinthethree-phaseasynchronousmachinecontrolsapplicationcompareswiththetraditionalblack–whitecontrol,hasth
3、econtrolspeedtobequick,themainbattlefield,hasprovidedtheveryreliablecontrolapplicationforvariousautomationcontroldeviceInthispaper,Yseriesthree-phasesquirrel-cageinductionmotordesignmethod,thearticlefirstofall,fromthebasictheoryofinductionmotorcharacteristicsandtheworktopro
4、ceed,brieflyintroducedthelatestdevelopmentoftheinductionmotor,thebasiccharacteristics,type,structure,purpose,technicalindicators,theworkingprincipleandoperationcharacteristics,designedforthemotortomakethenecessarypreparationsforthetheoryitcanprovidesafereliableandthequitepe
5、rfectsolutionfortheautomatedcontrolapplication,suitsinthecurrentindustrialenterprisetotheautomatedneed.Thispaperdesignsathree-phaseasynchronousmotor,2ofPLCcontrolcircuit,whichisofpositive&negativethree-phaseasynchronousmotorcontrolandtwomotorstartinginterlockscontrol,andthe
6、sequenceoftraditionalrelaycontrol,controlspeed,highreliabilityandflexibility,ascollegestudents'learningPLCcontroltechnology,butalsocanbeusedasreferencefortheautomaticcontrolofindustrialelectricalcircuit.Keywords:PLC;Three-phaseasynchronousmachine;relay24目录摘要................
7、......................................................2绪论......................................................................5正文.....................................................................61、设计要求...............................................................62、总体
8、设计...............................................................6(1)系统结构.........