资源简介 (共17张PPT)按钮、接触器双重联锁正反转控制电路理论讲解接触器联锁正反转控制电路按正转按钮电动机正转按停止按钮电动机停转按反转按钮电动机反转电动机在正转的情况下,是否能按下反转按钮就使电动机反转呢?能双重联锁按钮联锁接触器联锁接触器联锁接触器联锁正反转控制电路,将交流接触器的常闭触头与另一线圈串联构成。按钮联锁复合按钮开关常闭触头串联在对方电路中构成的联锁。L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1UVWQSU ---L1V ---L2W---L3U ---L3V ---L2W---L1KM2KM1M3~FRKM1KM2FR电路组成按钮联锁优点操作方便,能直接切换正转反转。缺点容易产生电源两相短路故障。接触器联锁优点线路工作可靠,能避免电源相间短路。缺点操作不便,不能直接切换正转反转。L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1UVWQSU ---L1V ---L2W---L3U ---L3V ---L2W---L1KM2KM1M3~FRKM1KM2FR电路组成避免相间短路快速切换正反转双重联锁L1L2L3KM1KM2SB1SB2SB3KM1KM2UVW合上QSKM2KM1FRKM1KM2FRM3~L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1KM2UVWQSKM2KM1FRKM1KM2FRM3~按下SB1SB1动断触头断开,对KM2联锁SB1动合触头闭合,KM1线圈得电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L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1KM2UVWQSKM2KM1FRKM1KM2FRM3~松开SB1SB1动断触头闭合SB1动合触头断开电机继续正转运行L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1KM2UVWQSKM2KM1FRKM1KM2FRM3~按下SB2SB2动断触头断开,对KM1联锁SB2动合触头闭合,KM2线圈得电L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1KM2UVWQSKM2KM1FRKM1KM2FRM3~L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1KM2UVWQSKM2KM1FRKM1KM2FRM3~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L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1KM2UVWQS松开SB2KM2KM1FRKM1KM2FRM3~按开SB3KM2动断线圈失电,动合辅助触头断开,解除自锁动合主触头断开电机停转L1L2L3FU1FU2KM1KM2SB1SB2SB3KM1KM2UVWQSKM2KM1FRKM1KM2FRM3~ 展开更多...... 收起↑ 资源预览