相异步电动机的降压启动控制线路1教学.ppt

L1L2L3FU1FU2KMKM△SB1SB2KMUVWQSKMYKMKMYKM△KMYKTKM△松开SB1电动机继续降压启动KMYKTM3～FRFR2.时间继电器自动控制Y—△降压启动控制线路Y-△降压启动控制线路L1L2L3FU1FU2KMKM△SB1SB2KMUVWQSKMYKMKMYKM△KMYKTKM△KT延时断开的动断触头延时分断KMY线圈失电KMY主触头断开KMY动合辅助触头断开KMY动断辅助触头闭合KM△主触头闭合KM△动断辅助触头断开KT线圈失电电动机全压运行KMYKTM3～FRFR2.时间继电器自动控制Y—△降压启动控制线路Y-△降压启动控制线路2.时间继电器控制串联电阻降压启动L1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1合上电源开关QSM3～FRFRKT2.时间继电器控制串联电阻降压启动L1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1降压启动:按下SB1KM1线圈得电M3～FRFRKT2.时间继电器控制串联电阻降压启动L1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1松开SB1,继续电动机降压启动M3～FRFRKT2.时间继电器控制串联电阻降压启动L1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1KT延时闭合,KM2线圈得电M3～FRFRKT2.时间继电器控制串联电阻降压启动L1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1KM2联锁触头断开,对KM1联锁,KM1线圈失电M3～FRFRKTL1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1KM2自锁触头闭合,自锁KM2主触头闭合,电阻被短路M3～FRFR2.时间继电器控制串联电阻降压启动KTL1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1KM1自锁触头闭合,自锁KM1主触头闭合,电动机降压启动KM1动合辅助触头闭合,KT线圈得电M3～FRFR2.时间继电器控制串联电阻降压启动KT2.时间继电器控制串联电阻降压启动L1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1KM1自锁触头断开,解除自锁KM1主触头断开，电动机全压运行KM1动合辅助触头断开,KT线圈失电,KT延时闭合触头瞬时断开M3～FRFRKTL1L2L3FU1FU2KM1KM2SB1SB2KM1KM2KM1KM2UVWQSKM2ＲKTKM1停：按下SB2M3～FRFR2.时间继电器控制串联电阻降压启动KT自耦变压器降压启动控制线路01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。01自耦变压器降压启动原理图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QJ10系列空气式手动自耦降压启动器电路图2.XJ01系列自耦降压启动箱自耦变压器降压启动控制线路U1V1W1KM3SB2KM1KTKM2SB1KM3L1L2L3FU1FU2FRKM3QSKM2KTKM1KTKM1KM2M3~FR3KM3KM1TMU1V1W1KM3SB2KM1KTKM2SB1KM3L1L2L3FU1FU2KM3QSKM2KTKM1KM1KM2KM3KM1合上电源开关QSTMFRM3~FR3KTU1V1W1KM3SB2KM1KTKM2SB1KM3L1L2L3FU1FU2KM3QSKM2KTKM1KM1KM2