课题七多速异步电动机的控制线路

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,课题七 多速异步电动机的控制线路,三相异步电动机,的转速公式 可知，改,变,异步电动机转速可通过三种方法来实现：,一是改变电源频率,f,1,；,二是改变转差率,s,；,三是改变磁极对数,p,。,改变异步电动机的磁极对数调速称为变极调速。变极调速是通过改变定子绕组的连接方式来实现的，它是有级调速，且只适用于笼型异步电动机。,U1,U2,V2,W1,W2,W2,L1 L2 L3,U2 V2 W2,U1 V1 W1,V2,V1,U2,L1 L2 L3,U1 V1 W1,U2 V2 W2,U1,V1,W1,1.,双速异步电动机定子绕组的连接,一、双速异步电动机的控制线路,L1L2L3,KH,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,M,3,3,KH,KM1,KM2,KM3,SB3,KM3 KM2,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,低速,高速,YY,2.,按钮和接触器控制双速电动机,3,L1L2L3,SB1,KM1,SB2,KM1,FU1,3,KM1,KM2,KM3,SB3,KM3 KM2,KM3 KM2,U1,V1,W1,U2,V2,W2,3,合上,QS,按下,SB1,KM1,线圈得电,KM2,QS,FU2,M,3,KM1,KM3,U1,U2,V1,W2,W1,V2,低速,高速,YY,KH,KH,2.,按钮和接触器控制双速电动机,L1L2L3,SB1,KM1,SB2,KM1,FU1,3,KM1,KM2,KM3,SB3,KM3 KM2,KM3 KM2,U1,V1,W1,U2,V2,W2,3,KM1,触头动作,电动机,联接,低速启动,KM2,QS,FU2,M,3,KM1,KM3,U1,U2,V1,W2,W1,V2,低速,高速,YY,KH,KH,2.,按钮和接触器控制双速电动机,L1L2L3,SB1,KM1,SB2,KM1,FU1,3,KM1,KM2,KM3,SB3,KM3 KM2,KM3 KM2,U1,V1,W1,U2,V2,W2,3,按下,SB2,KM1,线圈失电,KM2,KM3,线圈得电,联接,低速启动,KM2,QS,FU2,M,3,KM1,KM3,U1,U2,V1,W2,W1,V2,低速,高速,YY,KH,KH,2.,按钮和接触器控制双速电动机,L1L2L3,SB1,KM1,SB2,KM1,FU1,3,KM1,KM2,KM3,SB3,KM3 KM2,KM3 KM2,U1,V1,W1,U2,V2,W2,3,KM2,KM3,触头动作,电动机,YY,联接,电动机高速运行,KM2,QS,FU2,M,3,KM1,KM3,U1,U2,V1,W2,W1,V2,低速,高速,YY,KH,KH,2.,按钮和接触器控制双速电动机,低速,L1L2L3,SB1,KM1,SB2,KM1,FU1,3,KM1,KM2,KM3,SB3,KM3 KM2,KM3 KM2,U1,V1,W1,U2,V2,W2,3,松开,SB2,电动机继续高速运行,KM2,QS,FU2,M,3,KM1,KM3,U1,U2,V1,W2,W1,V2,高速,YY,KH,KH,2.,按钮和接触器控制双速电动机,L1L2L3,KH,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,3,KM1,KM2,KM3,SB3,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,低速,高速,YY,3.,时间继电器控制双速电动机,3,KT,KM1,KT,KT,KT,电路组成分析,KH,M,3,L1L2L3,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,3,KM1,KM2,KM3,SB3,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,3,KT,KM1,合上,QS,按下,SB1,KM1,线圈得电,KT,KT,KT,低速起动,低速运行,低速,高速,YY,KH,KH,M,3,3.,时间继电器控制双速电动机,L1L2L3,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,3,KM1,KM2,KM3,SB3,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,3,KT,KM1,KM1,触头动作,电动机三角形联接低速起动,松开,SB1,继续低速运行,KT,KT,KT,低速起动,低速运行,低速,高速,YY,KH,KH,M,3,3.,时间继电器控制双速电动机,L1L2L3,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,3,KM1,KM2,KM3,SB3,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,3,KT,KM1,KT,KT,KT,停,:,按下,SB3,或过载,低速起动,低速运行,低速,高速,YY,KH,KH,M,3,3.,时间继电器控制双速电动机,L1L2L3,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,3,KM1,KM2,KM3,SB3,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,3,KT,KM1,按下,SB2,KM1,线圈得电,KT,线圈得电,KT,KT,KT,低速起动,高速运行,低速,高速,YY,KH,KH,M,3,3.,时间继电器控制双速电动机,L1L2L3,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,3,KM1,KM2,KM3,SB3,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,3,KT,KM1,KM1,，,KT,各触头动作电动机低速起动,松开,SB2,KT,KT,KT,低速起动,高速运行,低速,高速,YY,KH,KH,M,3,3.,时间继电器控制双速电动机,L1L2L3,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,3,KM1,KM2,KM3,SB3,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,3,KT,KM1,经,KT,整定时间,KT,延时触头动作,KM1,线圈断电,KM2,KM3,线圈得电,动作电动机,高速运行,KT,KT,KT,低速起动,高速运行,低速,高速,YY,KH,KH,M,3,3.,时间继电器控制双速电动机,L1L2L3,SB1,KM1,KM2,SB2,KM1,QS,FU1,FU2,3,KM1,KM2,KM3,SB3,KM3 KM2,KM1,KM3,U1,V1,W1,U2,V2,W2,U1,U2,V1,W2,W1,V2,3,KT,KM1,KT,KT,KT,停,:,按下,SB3,或过载,低速起动,高速运行,低速,高速,YY,KH,KH,M,3,3.,时间继电器控制双速电动机,三速电动机定子绕组接线图,中速,Y,接法 高速,YY,接法,二、三速异步电动机的控制线路,三速电动机的两套定子绕组,低速,接法,1.,接触器控制三速电动机的控制线路,形低速,Y,形中速,YY,形高速,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,M,3,KM3,KM2,KM3,KM1,KM3,KM1,KM2,SB4,KM1,KM2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,KH,KH,电路组成分析,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,KM3,KM2,KM3,KM1,KM3,KM1,KM2,SB4,KM1,KM2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,合上电源开关,QS,按下,SB1,KM1,线圈得电,电动机接成,低速启动,M,3,KH,KH,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,KM3,KM2,KM3,KM1,KM3,KM1,KM2,SB4,KM1,KM2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,松开,SB1,电动机继续,低速启动,运行,M,3,KH,KH,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,KM3,KM2,KM3,KM1,KM3,KM1,KM2,SB4,KM1,KM2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,先按,SB4,KM1,线圈失电,电动机断电,再按,SB2,KM2,线圈得电,电动机,Y,联接,中速运行,M,3,KH,KH,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,KM3,KM2,KM3,KM1,KM3,KM1,KM2,SB4,KM1,KM2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,松开,SB2,电动机,Y,联接,继续,中速运行,M,3,KH,KH,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,KM3,KM2,KM3,KM1,KM3,KM1,KM2,SB4,KM1,KM2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,先按,SB4,KM2,线圈失电,电动机断电,再按,SB3,KM3,KM4,线圈得电,电动机,YY,联接,高速运行,M,3,KH,KH,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,KM3,KM2,KM3,KM1,KM1,KM2,SB4,KM1,KM2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,先按,SB4,KM2,线圈失电,电动机断电,再按,SB3,KM3,KM4,线圈得电,电动机,YY,联接,高速运行,M,3,KH,KH,2.,时间继电器自动控制三速电动机,的控制线路,形低速启动,运行,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,M,3,KM3,KM2,KM3,KM1,KM1,KM2,SB4,KM1,KT2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,KH,KH,电路组成分析,KT1,KT2,KT1,KT1,KM2,KM3,KM2,KM3,KT2,KT1,KT2,L1L2L3,KM1,QS,FU1,FU2,KM2,KM1,低速,Y,中速,YY,高速,KM3,KM3,KM2,KM3,KM1,KM1,KM2,SB4,KM1,KT2,SB2,SB3,SB1,U3,W1,V1,U1,V2,V4,U4,U2,W2,W4,KM4,3,3,3,KM4,KM4,KM2,KM3,KM4,低速启动运转,:,按下,SB1,KM1,线圈得电,KT1,KT2,KT1,KT1,KM2,KM3,KM2,KM3,KT2,KT1,KT2,