三相异步电动机自动往返控制电路连接.ppt

1,正确理解位置开关符号、原理,2,正确理解三相异步电动机自动往返控制电路的工作原理,3,正确安装三相异步电动机自动往返控制电路,学习目标,知识链接,一、位置开关,1.电气符号,知识链接,一、位置开关,1.动作特性被撞击时其常闭触头先断开，常开触头后闭合；当撞击的挡铁移开后触头均会恢复原位。,知识链接,二、自动往返控制线路,有些设备的工作台要在一定距离能自动循环往返，可用行程开关达到目的，实质上是用行程开关控制电动机正反转。,知识链接,L1L2L3,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,FU1,FU2,QS,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,合上电源开关QS,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,按下SB2，KM1线圈得电,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,KM1动合辅助触头闭合，对KM1自锁动合主触头闭合电机正转KM1动断触头断开对KM2联锁,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,松开SB2电动机继续正转,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,挡铁碰SQ1，SQ1动断触头断开KM1线圈失电KM1动合主触头断开，电机停转KM1动合触头断开解除对KM1自锁KM1动断触头闭合解除对KM2联锁,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,SQ1动合触头闭合KM2线圈得电,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,KM2动断触头断开对KM1联锁KM2动合触头闭合对KM2自锁KM2动合主触头闭合，电动机反转工作向右运动,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,SQ1复原工作台继续向右运动,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,挡铁碰SQ2SQ2动断触头断开KM2失电KM2动合主触头断开，电机停转KM2动合触头断开解除对KM2自锁KM2动断触头闭合解除对KM1联锁,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,挡铁碰SQ2SQ2动合触头闭合KM1线圈得电,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,KM1动合辅助触头闭合，对KM1自锁KM1动合主触头闭合,电机正转KM1动断触头断开对KM2联锁,FU1,FU2,QS,SB1,KM2,M3,L1L2L3,KM1,KM2,KH,SB2,SB3,KM1,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ3,SQ2,SQ4,KM2,SQ1,SQ2,SQ3,SQ4,按下SB1,各开关复位电机停转,FU1,FU2,QS,SB1,KM2,M3,知识链接,三、自动往返控制电路的安装,1.元件明细表,知识链接,三、自动往返控制电路的安装,2.安装步骤（1）检验所选电器元件的质量。（2）按元件布置图安装走线槽和所有电器元件，并贴上醒目的文字符号。（3）按电路图进行板前线槽配线，并在导线端部套编码套管和冷压接线头。（4）根据电路图检查控制板内部布线的正确性。（5）安装电动机。（6）连接电动机和按钮金属外壳的保护接地线。（7）连接电源、电动机等控制板外部的导线。（8）自检、交验、合格后通电试车。,知识链接,三、自动往返控制电路的安装,3.元件、槽板安装要求,元件安装要求：排列整齐间距合理便于更换,线槽安装要求：横平竖直整齐均匀安装牢固便于走线,知识链接,三、自动往返控制电路的安装,4.布线工艺要求：,知识链接,三、自动往返控制电路的安装,4.布线工艺要求：,知识链接,三、自动往返控制电路的安装,5.自检（1）按电路图或接线图连接完电路。（2）用万用表检查线路的通断情况。（3）用兆欧表检查线路的