电动机控制
电路
模拟电路李宁答案12数字电路仿真实验电路与电子学第1章单片机复位电路图组合逻辑电路课后答案
电动机的联接三相电动机有三个定子绕组，分别用U、V、W
表
关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf
示，每个绕组有两端，所以一共有六个接线端电动机的联接有两种方式，一种为星型联接，另一种为三角型联接星型接法三角型接法电动机的联接星型接法三角型接法U1V1W2U2W1V2U1V1W2U2W1V2L1L2L3L1L2L3L1L3L2L1L2L3直接控制原理合上QS,电动机启动。启动FU3~MQS优点：设备简单，安装容易缺点：只适用于小功率不频繁启动保护：短路保护、漏电保护EL1L2L3UVWU11V11W11线码：同一导线线码相同经过用电器线码改变QSKM1KM2SB1SB2KHU11V11W11U11V11W11L1L2L3UVWSB3KMKH..SB控制电路KH3~MKMEQSFU1FU2主电路L1L2L3点动控制原理按下按钮SB,KM线圈得电KM主触点闭合,电动机启动。得电启动KMKH..SB控制电路KH3~MKMEQSFU1FU2主电路L1L2L3点动控制原理松开按钮SB,KM线圈断电KM主触点断开,电动机停转。失电停止点动控制原理KMKH..SBKH3~MKMEQSFU1FU2L1L2L3线码UVWU11V11W11U12V12W12U13V13W130123QSKM1KM2SB1SB2KHU11V11W11V12U12W12U11V11W11U12V12U13V13W13U12V12W12U13V13W13L1L2L3UVW11SB3330022连续控制原理KMKH..SB2KH3~MKMEQSFU1FU2L1L2L3KM启动得电SB1合上开关QS按下起动按钮SB2,KM线圈得电，KM主触点闭合，电动机运转。KM辅助触点闭合自锁。松开起动按钮SB2连续控制原理KMKH..SB2KH3~MKMEQSFU1FU2L1L2L3KM停止失电SB1按下停止按钮SB1,KM线圈失电，KM主触点断开，电动机停止。KM辅助触点断开，解自锁。连续控制原理KMKH..SB2KH3~MKMEQSFU1FU2L1L2L3KMSB1电路保护短路保护熔断器热继电器过载保护接地漏电保护接触器失压保护连续控制原理KMKH..SB2KH3~MKMEQSFU1FU2L1L2L3KMSB1线码UVWU11V11W11U12V12W12U13V13W1301234..QSKM1KM2SB1SB2KHU11V11W11V12U12W12U11V11W11U12V12U13V13W13U12V12W12U13V13W13L1L2L3UVW11SB32233344400电动机正反转的控制线路将电动机接到电源的任意两根线对调一下，即可使电动机反转。需要用两个接触器来实现这一要求。当正转接触器工作时，电动机正转；当反转接触器工作时，将电动机接到电源的任意两根联线对调一下，电动机反转。演示连续正反转控制原理L1L2L3KH..SB2KH3~MKM1EQSFU1FU2KM1SB1.....SB3KM2KM1KM2KM2......KM1KM2连续正反转控制原理L1L2L3SB2和SB3决不允许同时按下，否则造成电源两相短路。正转按钮反转按钮反转接触器正转接触器反转触点正转触点KH..SB2KH3~MKM1EQSFU1FU2KM1SB1.....SB3KM2KM1KM2KM2......KM1KM2连续正反转控制原理L1L2L3.FU1..KH3~MKM1EQS....KM2FU2KHSB2KM1SB1SB3KM2KM1KM2......连续正反转控制原理L1L2L3.FU1FU2.KH.SB2KH3~MKM1EQSKM1SB1....SB3KM2KM1KM2KM2......合上QS,按下正转启动按钮SB2，常闭触点断开，互锁；常开触点闭合，KM1线圈得电，KM1主触点闭合，电动机正转，KM1常开辅助触点闭合，自锁连续正反转控制原理L1L2L3.FU1FU2.KH.SB2KH3~MKM1EQSKM1SB1....SB3KM2KM1KM2KM2......合上QS,按下反转启动按钮SB2，常闭触点断开，互锁；常开触点闭合，KM2线圈得电，KM2主触点闭合，电动机正转，KM2常开辅助触点闭合，自锁连续正反转控制原理FU2KHSB2KM1SB1SB3KM2KM1KM2......合上QS,按下正转启动按钮SB2，反转停止，正转启动。先断开失电闭合得电断开闭合连续正反转控制原理L1L2L3.FU1FU2.KH.SB2KH3~MKM1EQSKM1SB1....SB3KM2KM1KM2KM2......U11V11W11V12U12W12U13V13W13UVW01234567线码QSKM1KM2SB1SB2KHU11V11W11V12U12W12U11V11W11U12V12U13V13W13U12V12W12U12V12W12U13V13W13U13V13W13L1L2L3UVW11SB333333224445500066677FU2FRSB2SB1KM1.....SB3KM1102345FRSB2FU2KM1SB1SB3KM2KM1KM2......KM1KM210234567FU2FRSB2KM1SB1SB3KM2KM1KM2......01234567FRSB2FU2KM3SB1KM1KM2.....KM1KM210234567KTKTKM1..FU2FRSB2KM1SB1SB3KM2KM1KM2......01234567KM1KM289FRSB2FU2KM2SB1KM1KM......KM1KM10234567KTKTKM1..KM28FU2FRSB2KM1SB1SB3KM2KM1KM2......01234567QSKM1KM2SB1SB2KH11SB333333224445500066677连续正反转控制原理FU2KHSB2KM1SB1SB3KM2KM1KM2......01234567....SB4SB598QSSB1SB21SB333333KH1224766500079688KM1KM2SB4SB533779745连续正反转控制原理FU2KHSB2KM1SB1SB3KM2KM1KM2......01234567....SB4SB598KM1KM2QSSB1SB21SB333333KH1224766500079688KM1KM2SB4SB533779745FRSB2FU2KM2SB1KM1KA......KM3KM310234567KTKTKM1..KM28KAKAKTKM391011QS1103KH12SB1323SB24650007988KM1KM245KM3KT000KA441011467449
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