按钮联锁电机正反转原理.pptx

三相异步电机按钮联锁---《电机控制》Three-phaseasynchronousmotorbuttoninterlock--MotorControl

一、教学分析·教材课程项目内容：（2学时）知识点1：按钮联锁优缺点知识点2：按钮联锁原理图绘制知识点3：根据任务要求元器件选型、配线ButtoninterlockingadvantagesanddisadvantageButtoninterlockingschematicdrawingSelectandwirepartsaccordingtotaskrequirement

二、教学思路·教学目标知识目标技能目标素质目标①按钮联锁电路原理图、电气元件表②按钮联锁正反转控制线路动作原理①能够根据项目任务书绘制电路图（seeelectrical）②根据任务要求进行元器件选型①培养学生电器民族品牌的热爱②培养学生电路原理分析逻辑能力、工匠精神教学目标

二、教学思路·教学目标KnowledgeobjectiveSkillobjectiveQualityobjective①Candrawcircuitdiagramaccordingtotheprojectspecification②Selectcomponentaccordingtotaskrequirement①Cultivatestudentslovefornationalelectricalbrand②Cultivatestudentsabilityofanalyzinglogicofcircuitprinciple教学目标①Buttoninterlockcircuitschematic,electricalcomponentstable②Operationprincipleofbuttoninterlockingpositive

三、教学过程·课前学习准备1.通过钉钉平台创建学习小组，发布学习任务，按钮联锁正反转控制电路的优缺点。2.按钮联锁实际应用。3.寻找电机正反转控制电路元器件民族品牌1.CreatelearninggroupsthroughDingtalkplatform,publishlearningtasks,advantagesanddisadvantagesofbuttoninterlockingforwardandreversecontrolcircuit.2.Practicalapplicationofbuttoninterlocking.3.Lookfornationalbrandsofmotorpositiveandnegativecontrolcircuitcomponent

按钮联锁正反转控制电路优点：操作方便。电动机从正转到反转不需要按停止按钮，可直接按反转启动按钮；从反转到正转也不需要按停止按钮，可直接按正转启动按钮。Themotorfrompositivetoreversedoesnotneedtopressthestopbutton,candirectlypressthereversestartbutton;Youdonotneedtopressthestopbuttontoswitchfromreversetoforwardturn.Youcandirectlypressthestartbuttonofforwardturn缺点：容易产生电源两相短路故障circuitfault

按钮联锁正反转控制电路M3~KM1KM2KM1KM1FRSB1SB2L2L1L3QFFU1FU2SB3KM2KM2按下正转按钮SB2SB2常闭点断开PresstheforwardbuttonSB2SB2pointisdisconnected

按钮联锁正反转控制电路M3~KM1KM2KM1KM1FRSB1SB2L2L1L3QFFU1FU2SB3KM2KM2

按钮联锁正反转控制电路M3~KM1KM2KM1KM1FRSB1SB2L2L1L3QFFU1FU2SB3KM2KM2KM1主触点闭合KM1常开辅助触点闭合自锁电机正转KM1normallyopenauxiliarycontactclosedself-lockingKM1maincontactiscl