电工基础7动力线路.ppt
,课题一 三相异步电动机的正转控制线路,一、手动正转控制线路,M3,L1 L2 L3,QF-FU,电路组成分析,.负荷开关正转控制,M3,L1 L2 L3,QF-FU,起动：合上开关QF电动机运转,.负荷开关正转控制,M3,L1 L2 L3,QF-FU,停止：拉断开关QF电动机停转,.负荷开关正转控制,M3,L1 L2 L3,QF-FU,电路组成分析,M3,2.组合开关正转控制,L1 L2 L3,QF-FU,起动：转动手柄，合上开关QF电动机运转,2.组合开关正转控制,M3,L1 L2 L3,QF-FU,停止：转动手柄，断开开关QF电动机停转,M3,2.组合开关正转控制,二、点动正转控制线路,刀架,按钮,操作人员在快速移动车床刀架时，只要按下按钮，刀架就快速移动；松开按钮，刀架立即停止移动。,点动控制电路模拟配电盘,二、点动正转控制线路,SB,KM,KM,L1L2L3,QF,FU1,FU2,电路组成分析,M3,二、点动正转控制线路,SB,KM,KM,L1L2L3,QF,FU2,合上开关QF,FU1,M3,二、点动正转控制线路,SB,KM,KM,L1L2L3,QF,FU2,起动：按下SBKM线圈得电,FU1,M3,二、点动正转控制线路,SB,KM,KM,L1L2L3,QF,FU2,KM主触头闭合电动机起动,FU1,M3,二、点动正转控制线路,SB,KM,KM,L1L2L3,QF,FU2,停止：松开SB，KM线圈失电 KM主触头断开，电动机停转,FU1,M3,二、点动正转控制线路,.一般原则1)以国标图形符号表示电气元器件2)主电路与辅助电路分开3)可以将同一个电器元分解为几部分4)各电器元件的触头位置都按未受外力作用时的常态位置画出5)有直接电联系的交叉点用小黑点表示,QF FU1 FU2,SB2,KM,KM,L1L2L3,KM,SB1,KH,KH,具有过载保护的正转控制原理图,原理图的绘制原则,M3,原理图的绘制原则,2.电路各点标记1)从电源引入用L1、L2、L3表示2)开关之后用U、V、W表示3)电动机各分支电路用文字符号加阿拉伯数字4)控制电路用阿拉伯数字编号3.数字与图形符号组合,数字在后,QF FU1 FU2,SB2,KM,KM,L1L2L3,KM,SB1,U13,V13,W13,U11,V11,W11,U12,V12,W12,2,3,1,M3,KH,KH,具有过载保护的正转控制原理图,具有过载保护的接触器自锁正转控制线路,KM,L1L2L3,KM,KH,QF,FU2,FU1,电路组成分析：在具有自锁的正转控制电路的主电路中串联热继电器，并将其动断触头串联控制回路中,SB1,KM,SB2,KH,KM,L1L2L3,KM,KH,QF,FU2,FU1,合上开关QF,具有过载保护的接触器自锁正转控制线路,SB1,KM,SB2,KH,KM,L1L2L3,KM,KH,QF,FU2,FU1,起动：按下BS1有电流通过KM线圈,具有过载保护的接触器自锁正转控制线路,SB1,KM,SB2,KH,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,QF,FU2,FU1,交流接触器动合主触头闭合，电动机正转起动交流接触器动自锁触头闭合，自锁,具有过载保护的接触器自锁正转控制线路,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,QF,FU2,FU1,松开SB1，电动机继续运行,具有过载保护的接触器自锁正转控制线路,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,QF,FU2,FU1,起动过程与具有自锁的正转控制电路相同,具有过载保护的接触器自锁正转控制线路,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,QF,FU2,FU1,停止：过载时，KH动断触头断开（或按下SB2）KM线圈失电，自锁触头断开，解除自锁动合主触头断开，电动机断电停转,具有过载保护的接触器自锁正转控制线路,电动机接线柱,热继电器,热继电器动断触头接线柱,交流接触器,线圈,按钮,L1 L2 L3,模拟实验室连接具有过载保护接触器自锁正转控制电路,电动机接线柱,热继电器,热继电器动断触头接线柱,交流接触器,线圈,按钮,L1 L2 L3,模拟实验室连接具有过载保护接触器自锁正转控制电路,接触器自锁控制线路板,四、连续与点动混合正转控制电路,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,电路组成分析,FU1,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,合上电源开关QF,FU1,四、连续与点动混合正转控制电路,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,点动：按下BS3,动断触头断开,动合触头闭合，KM线圈得电,FU1,四、连续与点动混合正转控制电路,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,点动：动合主触头闭合，电动机起动,FU1,四、连续与点动混合正转控制电路,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,停：松开SB3，KM线圈失电电动机停转,FU1,四、连续与点动混合正转控制电路,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,连续：按下SB1，KM线圈得电,FU1,四、连续与点动混合正转控制电路,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,连续：KM动合主触头闭合，电动机起动，KM动合辅触头闭合，自锁,FU1,四、连续与点动混合正转控制电路,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,连续：松开SB2，电动机继续转动,FU1,四、连续与点动混合正转控制电路,QF FU2,SB1,KM,KM,L1L2L3,KM,SB2,KH,KH,SB3,SB3,停：按下SB2，KM线圈失电电动机停转,FU1,四、连续与点动混合正转控制电路,课题二 三相异步电动机的正反转控制线路,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。,一、倒顺开关正反转控制线路,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。,一、倒顺开关正反转控制线路,L1 L2 L3,FU,QS,熔断器,倒顺开关,电动机,U,V,W,M3,一、倒顺开关正反转控制线路,L1 L2 L3,FU,QS,电动机正转,U,V,W,U L1V L2WL3,M3,熔断器,手柄扳至“顺”位置,L1 L2 L3,FU,QS,熔断器,电动机停转,U,V,W,手柄扳至“停”位置,M3,一、倒顺开关正反转控制线路,L1 L2 L3,FU,QS,熔断器,电动机反转,U,V,W,手柄扳至“倒”位置,U L3V L2WL1,M3,一、倒顺开关正反转控制线路,L1 L2 L3,FU,QS,熔断器,电动机停转,U,V,W,手柄扳至“停”位置,M3,一、倒顺开关正反转控制线路,二、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。,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,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,L1L2L3,FU1,FU2,KM1,KM2,KH,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH,U,V,W,QS,KM2,KM1,松开SB1,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,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,M3,二、接触器联锁正反转控制线路,L1L2L3,FU1,FU2,KM1,KM2,FR,SB2,SB3,SB1,KM1,KM2,KM1,KM2,FR,U,V,W,QS,KM2,KM1,松开SB1,M3,二、接触器联锁正反转控制线路,电动机,热继电器,热继电器动断触头接线柱,交流接触器,线圈,按钮,L1 L2 L3,模拟实验室连接接触器联锁正反转控制电路,电动机,热继电器,热继电器动断触头接线柱,交流接触器,线圈,按钮,L1 L2 L3,模拟实验室连接接触器联锁正反转控制电路,接触器联锁正反转控制线路板,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。,三、按钮、接触器双重联锁正反转控制线路,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,U-L1V-L2W-L3,U-L3V-L2W-L1,KM2,KM1,M3,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,合上电源开关QS,KM2,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,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,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,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,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,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,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,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,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,松开SB1,KM2,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,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,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,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,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,松开SB3,KM2,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,按下SB1,KM2线圈失电，动合辅助触头断开,解除自锁动合主触头断开电机停转,KM2,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,L1L2L3,FU1,FU2,KM1,KM2,SB2,SB3,SB1,KM1,KM2,U,V,W,QS,也可直接按下SB3,SB3动断触头断开,对KM1联锁,使KM1线圈失电,SB3动合触头闭合,KM2线圈得电,KM2,KM1,三、按钮、接触器双重联锁正反转控制线路,KH,KM1,KM2,KH,M3,电动机,热继电器,热继电器动断触头接线柱,交流接触器,线圈,按钮,L1 L2 L3,模拟实验室连接按钮、接触器双重联锁正转控制电路,复合按钮,按钮、接触器双重联锁正反转控制线路板,课题三 位置控制与自动往返控制线路,在生产过程中，一些生产机械运动部件的行程或位置要受到限制，有些生产机械的工作台要求在一定行程内自动往返运动，以便实现对工件的连续加工，提高生产效率。如在摇臂钻床、万能铣床、镗床、桥式起重机及各种自动或半自动控制机床设备中就经常遇到这种控制要求。,利用生产机械运动部件上的挡铁与行程开关碰撞，使其触头动作，来接通或断开电路，以实现对生产机械运动部件的位置或行程的自动控制，称为位置控制，又称行程控制或限位控制。实现这种控制要求所依靠的主要电器是行程开关。,一、位置控制线路,L1L2L3,FU1,FU2,KM1,KM2,KH,SB1,SB2,SB3,KM1,KM2,KM1,KH,U,V,W,QS,KM2,KM1,SQ1,SQ2,KM2,SQ1,SQ2,M3,行车,电路组成分析,L1L2L3,KM1,KM2,KH,SB1,SB2,SB3,KM1,KM2,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ2,KM2,SQ1,SQ2,行车,合上电源开关QS,FU1,FU2,QS,M3,L1L2L3,KM1,KM2,KH,SB1,SB2,SB3,KM1,KM2,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ2,KM2,SQ1,SQ2,行车,按下SB1,FU1,FU2,QS,M3,L1L2L3,KM1,KM2,KH,SB1,SB2,SB3,KM1,KM2,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ2,KM2,SQ1,SQ2,电动机正转,向前,FU1,FU2,QS,M3,L1L2L3,KM1,KM2,KH,SB1,SB2,SB3,KM1,KM2,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ2,KM2,SQ1,SQ2,松开SB1,向前,FU1,FU2,QS,M3,L1L2L3,KM1,KM2,KH,SB1,SB2,SB3,KM1,KM2,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ2,KM2,SQ1,SQ2,挡铁碰撞SQ1,行车,停止,FU1,FU2,QS,M3,L1L2L3,KM1,KM2,KH,SB1,SB2,SB3,KM1,KM2,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ2,KM2,SQ1,SQ2,按下SB2,向后,FU1,FU2,QS,M3,L1L2L3,KM1,KM2,KH,SB1,SB2,SB3,KM1,KM2,KM1,KH,U,V,W,KM2,KM1,SQ1,SQ2,KM2,SQ1,SQ2,挡铁碰撞SQ2,停止,FU1,FU2,QS,M3,二、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。,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,课题四 顺序控制与多地控制线路,一、顺序控制线路 在装有多台电动机的生产机械上，各电动机所起的作用是不同的，有时需按一定的顺序启动或停止，才能保证操作过程的合理和工作的安全可靠。,主电路实现顺序控制,M13,L1L2L3,FU1,FU2,KM1,KM2,KH1KH2,SB1,SB2,SB3,KM1,KM2,KM1,KM2,KH1,U,V,W,QS,KH2,M23,L1L2L3,FU1,FU2,KM1,KM2,KH1KH2,SB1,SB2,SB3,KM1,KM2,KM1,KM2,KH1,U,V,W,QS,合上电源开关QS,M13,M23,KH2,主电路实现顺序控制,L1L2L3,FU1,FU2,KM1,KM2,KH1KH2,SB1,SB2,SB3,KM1,KM2,KM1,KM2,KH1,U,V,W,QS,只能先按下SB1,M13,M23,KH2,主电路实现顺序控制,L1L2L3,FU1,FU2,KM1,KM2,KH1KH2,SB1,SB2,SB3,KM1,KM2,KM1,KM2,KH1,U,V,W,QS,电动机M1起动,M13,M23,KH2,主电路实现顺序控制,L1L2L3,FU1,FU2,KM1,KM2,KH1KH2,SB1,SB2,SB3,KM1,KM2,KM1,KM2,KH1,U,V,W,QS,按下SB2电动机M2起动,M13,M23,KH2,主电路实现顺序控制,L1L2L3,FU1,FU2,KM1,KM2,KH1KH2,SB1,SB2,SB3,KM1,KM2,KM1,KM2,KH1,U,V,W,QS,按下SB3KM1线圈KM2线圈同时失电,M13,M23,KH2,主电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,合上电源开关QS,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,按下SB2，KM1线圈得电,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,KM1自锁触头闭合,对KM1自锁KM1主触头闭合电机M1正转,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,松开SB2电动机继续运行,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,按下SB3，KM2线圈得电,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,KM2自锁触头闭合,对KM2自锁KM2主触头闭合，电动机M2正转,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,松开SB3，电动机M1、M2继续正转,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,L1L2L3,KM1,KM2,KH1KH2,SB2,SB3,SB1,KM1,KM2,KM1,KM2,KH1,U,V,W,按下SB1,KM1，KM2线圈失电，动合辅助触头断开,解除自锁动合主触头断开电机停转,FU1,FU2,QS,M13,M23,KH2,控制电路实现顺序控制,二、多地控制电路,能在两地或多地控制同一台电动机的控制方式叫做电动机的多地控制。,L1L2L3,FU1,FU2,KM,KH,SB12,SB22,KM,KH,U,V,W,M 3,QS,SB11,SB21,KM,二、多地控制电路,L1L2L3,FU1,FU2,KM,SB12,SB22,KM,U,V,W,QS,SB11,SB21,KM,合上电源开关QS,KH,KH,M 3,二、多地控制电路,L1L2L3,FU1,FU2,KM,SB12,SB22,KM,U,V,W,QS,SB11,SB21,KM,按下SB11（甲地）KM线圈得电,KH,KH,M 3,二、多地控制电路,L1L2L3,FU1,FU2,KM,SB12,SB22,KM,U,V,W,QS,SB11,SB21,KM,KM自锁触头闭合,自锁KM主触头闭合电机正转,KH,KH,M 3,二、多地控制电路,L1L2L3,FU1,FU2,KM,SB12,SB22,KM,U,V,W,QS,SB11,SB21,KM,松开SB11（甲地）电机继续正转,KH,KH,M 3,二、多地控制电路,L1L2L3,FU1,FU2,KM,SB12,SB22,KM,U,V,W,QS,SB11,SB21,KM,按下SB12 KM线圈失电自锁触头断开,解除自锁主触头断开电机停转,KH,KH,M 3,二、多地控制电路,L1L2L3,FU1,FU2,KM,SB12,SB22,KM,U,V,W,QS,SB11,SB21,KM,按下SB21（乙地）KM线圈得电,KH,KH,M 3,二、多地控制电路,L1L2L3,FU1,FU2,KM,SB12,SB22,KM,U,V,W,QS,SB11,SB21,KM,松开SB21（乙地）电机继续正转,KH,KH,M 3,二、多地控制电路,L1L2L3,FU1,FU2,KM,SB12,SB22,KM,U,V,W,QS,SB11,SB21,KM,按下SB22 KM线圈失电自锁触头断开,解除自锁主触头断开电机停转,KH,KH,M 3,二、多地控制电路,课题五 三相异步电动机的 降压启动控制线路,全压启动：启动时加在电动机定子绕组上的电压为电动机的额定电压。降压启动：利用启动设备将电压适当降低后，加到电动机的定子绕组上进行启动，待电动机启动运转后，再使其电压恢复到额定电压正常运转。电动机的直接启动条件：,二、自耦变压器降压启动控制线路,自耦变压器降压启动：在电动机启动时利用自耦变压器来降低加在电动机定子绕组上的启动电压。待电动机启动后，再使电动机与自耦变压器脱离，从而在全压下正常运行。,自耦变压器降压启动原理图,1.手动自耦降压启动器,QJD3系列手动自耦降压启动器外形及电路图,电动机启动时，把电动机的定子绕组接成星形，电动机定子绕组电压低于电源电压起动，启动即将完毕时再恢复成三角形，电动机便在额定电压下正常运行。,三、Y降压启动控制线路,启动时，把定子三相绕组的一部分联接成三角形，另一部分联接成星形，每相绕组上所承受的电压，比三角形联接时的相电压要低，比星形联接时的相电压要高，电动机延边三角形降压启动，待电动机启动运转后，再将绕组联接三角形，全压运行。,四、延边降压启动控制线路,
