正反转控制线路,按钮连锁的正反转控制线路,利用按钮实现联锁控制，从而使两个接触器线圈不能同时得电，防止了主电路的短路事故,请自行设计利用按钮互锁实现的正反转控制电路,按钮联锁的正反转控制线路,M,3,KM1,KM2,KM1,KM1,FR,SB1,SB2,QF,FU1,FU2,SB3,KM2,KM2,按钮连锁的正反转控制线路,按钮联锁正反转制线路图,按下正转按钮SB2,SB2常闭点断开,M,3,KM1,KM2,KM1,KM1,FR,SB1,SB2,QF,FU1,FU2,SB3,KM2,KM2,按钮连锁的正反转控制线路,按钮联锁正反转制线路图,KM1线圈得电,M,3,KM1,KM2,KM1,KM1,FR,SB1,SB2,QF,FU1,FU2,SB3,KM2,KM2,按钮连锁的正反转控制线路,按钮联锁正反转制线路图,KM1主触点闭合,KM1常开辅助触点闭合自锁,电机正转,M,3,KM1,KM2,KM1,KM1,FR,SB1,SB2,QF,FU1,FU2,SB3,KM2,KM2,按钮连锁的正反转控制线路,按钮联锁正反转制线路图,松开正转按钮SB2电机依然正传,试想：若此时按下反转按钮SB3主电路会短路吗？为什么？,试想：若此时按下反转按钮SB3能够直接实现反转吗？,M,3,KM1,KM2,KM1,KM1,FR,SB1,SB2,QF,FU1,FU2,SB3,KM2,KM2,按钮连锁的正反转控制线路,按钮联锁正反转制线路图,按下反转按钮SB3,M,3,KM1,KM2,KM1,KM1,FR,SB1,SB2,QF,FU1,FU2,SB3,KM2,KM2,按钮连锁的正反转控制线路,按钮联锁正反转制线路图,KM2线圈得电,KM1自锁触点打开,KM1主触点打开,M,3,KM1,KM2,KM1,KM1,FR,SB1,SB2,QF,FU1,FU2,SB3,KM2,KM2,按钮连锁的正反转控制线路,按钮联锁正反转制线路图,KM2线圈得电,M,3,KM1,KM2,KM1,KM1,FR,SB1,SB2,QF,FU1,FU2,SB3,KM2,KM2,按钮连锁的正反转控制线路,按钮联锁正反转制线路图,电机反转,KM2主触点闭合,KM2常开辅助触点闭合自锁,12,按钮联锁正反转控制线路原理分析,13,正反转主电路接线图,QS,FU1,KM1,KM2,FR,14,按钮联锁正反转控制电路接线图,FR,1,0,2,4,5,6,7,2,4,6,5,7,