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1、三、异步电动机的正反转控制线路若改变电动机转动方向，可将接至交流电动机的三相交流电源进线中任意两相对调，电动机就可以反转。1、接触器联锁正反转控制线路利用两个交流接触器交替工作，改变电源接入电动机的相序来实现电动机正反转控制。L1L2L3FU1FU2KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWQSKM2KM1U---L1V---L2W---L3U---L3V---L2W---L1M3~接触器联锁正反转控制线路L1L2L3FU1FU2KM1KM2FRSB2SB3SB1KM1KM2KM1KM2F
2、RUVWQSKM2KM1合上电源开关QSM3~L1L2L3FU2KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWQSKM2KM1按SB2KM1线圈得电FU1M3~L1L2L3KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWKM2KM1KM1自锁触头闭合,自锁KM1动合主触头闭合,电机正转KM1联锁触头断开对KM2联锁FU2QSFU1M3~L1L2L3KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWKM2KM1松开SB2电机继续正转运行FU2QSFU1M3~
3、KM2按下SB1,KM1线圈失电，KM1自锁触头断开,解除自锁KM1主触头断开,电机停转KM1联锁触头闭合，解除联锁L1L2L3FU1FU2KM1KM2FRSB2SB3SB1KM1KM2KM1FRUVWQSKM2KM1M3~L1L2L3FU1FU2KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWQSKM2KM1松开SB1M3~L1L2L3KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWKM2KM1按SB3KM2线圈得电FU2QSFU1M3~L1L2L3KM1KM2FRSB2S
4、B3SB1KM1KM2KM1KM2FRUVWKM2KM1KM2自锁触头闭合,自锁KM2主触头闭合,电机反转KM2联锁触头断开对KM1联锁FU2QSFU1M3~L1L2L3KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWKM2KM1松开SB3电机继续反转FU2QSFU1M3~L1L2L3FU1FU2KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWQSKM2KM1按下SB1,KM2线圈失电KM2自锁触头断开,解除自锁KM2主触头断开,电机停转KM2联锁触头闭合，解除联锁M3~L1
5、L2L3FU1FU2KM1KM2FRSB2SB3SB1KM1KM2KM1KM2FRUVWQSKM2KM1松开SB1M3~为克服接触器联锁正反转控制电路和按钮联锁正反转控制电路的不足，在按钮联锁的基础上，又增加了接触器联锁，就构成按钮、接触器双重联锁正反转控制电路。2、按钮、接触器双重联锁正反转控制线路L1L2L3FU1FU2KM1KM2SB2SB3SB1KM1KM2UVWQSU---L1V---L2W---L3U---L3V---L2W---L1KM2KM1M3~FRKM1KM2FR双重联锁正反转控制线路L1L2L
6、3FU1FU2KM1KM2SB2SB3SB1KM1KM2UVWQS合上电源开关QSKM2KM1FRKM1KM2FRM3~L1L2L3FU1FU2KM1KM2SB2SB3SB1KM1KM2UVWQS按下SB2，SB2动断触头断开,对KM2联锁SB2动合触头闭合,KM1线圈得电KM2KM1FRKM1KM2FRM3~L1L2L3FU1FU2KM1KM2SB2SB3SB1KM1KM2UVWQSKM1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KM2KM1FRKM1KM2FRM3
7、~L1L2L3FU1FU2KM1KM2SB2SB3SB1KM1KM2UVWQS松开SB2,SB2动断触头闭合SB2动合触头断开电机继续正转运行KM2KM1FRKM1KM2FRM3~L1L2L3FU1FU2KM1KM2SB2SB3SB1KM1KM2UVWQS按下SB1,使KM1线圈失电,各触头复位KM2KM1FRKM1KM2FRM3~L1L2L3FU1FU2KM1KM2SB2SB3SB1KM1KM2UVWQS松开SB1KM2KM1FRKM1KM2FRM3~L1L2L3FU1FU2KM1KM2SB2SB3SB1KM1K
8、M2UVWQS或按下SB3,SB3动断触头断开,对KM1联锁,SB3动合触头闭合,KM2线圈得电KM2KM1FRKM1KM2FRM3~L1L2L3FU1FU2KM1KM2SB2SB3SB1KM1KM2UVWQSKM2动合辅助触头闭合,对KM2自锁KM2动合主触头闭合,电机反转KM2动断触头断开对KM1联锁KM2KM1KHKM1KM2KHM3~L1L2L3FU
