电动机正反转控制PPT课件

.,1,电动机正反转控制电路,.,2,主要内容2.2.2三相异步电动机的正反转控制线路,三相异步电动机反转方法实现电路,.,3,若改变电动机转动方向，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。,1.三相异步电动机反转方法,.,4,2.实现电路,倒顺开关正反转控制线路接触器联锁正反转控制线路按钮、接触器双重联锁正反转控制线路,.,5,倒顺开关，又叫可逆转换开关，利用改变电源相序来实现电动机手动正反转控制。,实现电路倒顺开关正反转控制线路,.,6,实现电路倒顺开关正反转控制线路,.,7,L1L2L3,FU,QS,电动机正转,U,V,W,UL1VL2WL3,M3,熔断器,手柄扳至“顺”位置,实现电路倒顺开关正反转控制线路,.,8,L1L2L3,FU,QS,熔断器,电动机停转,U,V,W,手柄扳至“停”位置,M3,实现电路倒顺开关正反转控制线路,.,9,L1L2L3,FU,QS,熔断器,电动机反转,U,V,W,手柄扳至“倒”位置,UL3VL2WL1,M3,实现电路倒顺开关正反转控制线路,.,10,L1L2L3,FU,QS,熔断器,电动机停转,U,V,W,手柄扳至“停”位置,M3,实现电路倒顺开关正反转控制线路,.,11,注意事项,电动机处于正转状态时，欲使它反转必须先把手柄转到“停止”位置，使电动机先停转，然后再把手柄转到“倒转”控制位置，使电动机反转。反之易然。若手柄直接从”顺转”扳到“倒转”位置，因电源突然反接，会产生很大的反接电流，易使电动机的定子绕组损坏。所用控制电器较少；其缺点是操作繁琐，特别是在频繁转向控制时，操作人员劳动强度较大，不方便。且被控制的电动机的容量较小。,.,12,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。,实现电路接触器联锁正反转控制线路,.,13,L1L2L3,FU1,FU2,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,QS,KM2,KM1,U-L1V-L2W-L3,U-L3V-L2W-L1,M3,实现电路接触器联锁正反转控制线路,.,14,L1L2L3,FU1,FU2,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,QS,KM2,KM1,合上电源开关QS,M3,实现电路接触器联锁正反转控制线路,.,15,L1L2L3,FU2,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,QS,KM2,KM1,按SB2KM1线圈得电,FU1,M3,实现电路接触器联锁正反转控制线路,.,16,L1L2L3,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,KM2,KM1,KM1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,FU2,QS,FU1,M3,实现电路接触器联锁正反转控制线路,.,17,L1L2L3,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,KM2,KM1,松开SB2电机继续正转运行,FU2,QS,FU1,M3,实现电路接触器联锁正反转控制线路,.,18,L1L2L3,FU1,FU2,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,QS,KM2,KM1,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,M3,实现电路接触器联锁正反转控制线路,.,19,L1L2L3,FU1,FU2,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,QS,KM2,KM1,松开SB1,M3,实现电路接触器联锁正反转控制线路,.,20,L1L2L3,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,KM2,KM1,按SB3KM2线圈得电,FU2,QS,FU1,M3,实现电路接触器联锁正反转控制线路,.,21,L1L2L3,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,KM2,KM1,KM2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,FU2,QS,FU1,M3,实现电路接触器联锁正反转控制线路,.,22,L1L2L3,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,KM2,KM1,松开SB3电机继续反转,FU2,QS,FU1,M3,实现电路接触器联锁正反转控制线路,.,23,L1L2L3,FU1,FU2,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,QS,KM2,KM1,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,实现电路接触器联锁正反转控制线路,.,24,L1L2L3,FU1,FU2,KM1,KM2,FR,SB2,SB3,SB1,KM1,KM2,KM1,KM2,FR,U,V,W,QS,KM2,KM1,松开SB1,M3,实现电路接触器联锁正反转控制线路,.,25,接触器联锁正反转控制线路动画演示,.,26,接触器联锁正反转控制线路电路优缺点,电动机从正转变为反转时，必须先按下停止按钮后，才能按反转启动按钮，否则由于接触器的联锁作用，不能实现反转。因此线路工作安全可靠，但操作不便。,.,27,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。,实现电路按钮、接触器双重联锁正反转控制线路,.,28,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,U-L1V-L2W-L3,U-L3V-L2W-L1,KM2,KM1,M3,按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,.,29,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,合上电源开关QS,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,30,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,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,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,31,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,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,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,32,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,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,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,33,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,按下SB1,使KM1线圈失电,各触头复位,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,34,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,松开SB1,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,35,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,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,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,36,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,KM2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,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,37,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,松开SB3,KM2,KM1,KH,KM1,KM2,KH,M3,按钮、接触器双重联锁正反转控制线路,.,38,L1L2L3,FU1,