课题三--位置控制与自动往返控制线路解析电子教案.ppt

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1、课题三--位置控制与自动往返控制线路解析L1L2L3FU1FU2KM1KM2FRSB1SB2SB3KM1KM2KM1FRUVWQSKM2KM1SQ1SQ2KM2SQ1SQ2M3~行车电路组成分析L1L2L3KM1KM2FRSB1SB2SB3KM1KM2KM1FRUVWKM2KM1SQ1SQ2KM2SQ1SQ2行车合上电源开关QSFU1FU2QSM3~L1L2L3KM1KM2FRSB1SB2SB3KM1KM2KM1FRUVWKM2KM1SQ1SQ2KM2SQ1SQ2行车按下SB1FU1FU2QSM3~L1L2L3KM1KM2FRSB1SB2SB3KM1KM2KM1FRUV

2、WKM2KM1SQ1SQ2KM2SQ1SQ2电动机正转行车向前FU1FU2QSM3~L1L2L3KM1KM2FRSB1SB2SB3KM1KM2KM1FRUVWKM2KM1SQ1SQ2KM2SQ1SQ2松开SB1行车向前FU1FU2QSM3~L1L2L3KM1KM2FRSB1SB2SB3KM1KM2KM1FRUVWKM2KM1SQ1SQ2KM2SQ1SQ2挡铁碰撞SQ1行车停止FU1FU2QSM3~L1L2L3KM1KM2FRSB1SB2SB3KM1KM2KM1FRUVWKM2KM1SQ1SQ2KM2SQ1SQ2按下SB2向后行车FU1FU2QSM3~L1L2L3KM1K

3、M2FRSB1SB2SB3KM1KM2KM1FRUVWKM2KM1SQ1SQ2KM2SQ1SQ2挡铁碰撞SQ2行车停止FU1FU2QSM3~二、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。自动往返控制线路L1L2L3KM1KM2FRSB2SB3SB1KM1KM2KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4FU1FU2QSM3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4合上电源

4、开关QSFU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4按下SB2，KM1线圈得电FU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4KM1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FU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ

5、4KM2SQ1SQ2SQ3SQ4松开SB2电动机继续正转FU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4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FU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4SQ1动合触头闭合KM2线圈得电FU1FU2QSSB

6、1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4KM2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FU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4SQ1复原工作台继续向右运动FU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2S

7、Q1SQ2SQ3SQ4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FU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4挡铁碰SQ2SQ2动合触头闭合KM1线圈得电FU1FU2QSSB1KM2M3~L1L2L3KM1KM2FRSB2SB3KM1KM1FRUVWKM2KM1SQ1SQ3SQ2SQ4KM2SQ1SQ2SQ3SQ4KM1动合辅助触