1、电动机控制电路电动机控制电路电动机的联接电动机的联接三相电动机有三个定子绕组三相电动机有三个定子绕组,分别用,分别用U、V、W表示,表示,每个绕组有两端,所以一共有六个接线端每个绕组有两端,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一种为三角型联接星型接法星型接法三角型接法三角型接法电动机的联接电动机的联接星型接法星型接法三角型接法三角型接法U1V1W2U2W1V2U1V1W2U2W1V2L1L2L3L1L2L3L1L3L2L1L2L3,电动机启动。电动机启动。3MQS优点:设备简单,安装容易优点:设备简单,安装容易
2、缺点:只适用于小功率不频缺点:只适用于小功率不频 繁启动繁启动保护:短路保护、漏电保护保护:短路保护、漏电保护EL1 L2 L3UVWU11 V11W11线码:同一导线线码相同线码:同一导线线码相同 经过用电器线码改变经过用电器线码改变QSKM1KM2SB1SB2KHU11 V11 W11U11 V11 W11L1L2L3UVWSB3.3MEQSFU1FU2L1L2L3,KM线圈得电线圈得电KM主触点闭合主触点闭合,电动机启动。电动机启动。.3MEQSFU1FU2L1L2L3,KM线圈断电线圈断电KM主触点断开主触点断开,电动机停转。电动机停转。.3MEQSFU1FU2L1L2L3线码线码UV
3、 WU11V11W11U12V12W12U13V13 W130123QSKM1KM2SB1SB2KHU11 V11 W11V12U12W12U11 V11 W11U12 V12U13V13 W13U12V12 W12U13V13 W13L1L2L3UVW11SB3330022.3MEQSFU1FU2L1L2L3KM SB1合上开关合上开关QS按下起动按钮按下起动按钮SB2,KM线圈得电,线圈得电,KM主触点闭合,主触点闭合,电动机运转。电动机运转。KM辅助触点闭合自锁。辅助触点闭合自锁。.3MEQSFU1FU2L1L2L3KM SB1按下停止按钮按下停止按钮SB1,KM线圈失电,线圈失电,KM
4、主触点断开,主触点断开,电动机停止。电动机停止。KM辅助触点断开,解自锁。辅助触点断开,解自锁。.3MEQSFU1FU2L1L2L3KMSB1电路保护电路保护短路保护短路保护热继电器热继电器过载保护过载保护接地接地漏电保护漏电保护接触器接触器失压保护失压保护.3MEQSFU1FU2L1L2L3KMSB1线码线码UV WU11V11W11U12V12W12U13V13 W1301234.QSKM1KM2SB1SB2KHU11 V11 W11V12U12W12U11 V11 W11U12 V12U13V13 W13U12V12 W12U13V13 W13L1L2L3UVW11SB322333444
5、00 将电动机接到电源的任意两根线对调一下,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。即可使电动机反转。L1L2L3.3MEQSFU1FU2KM1SB1.KM2KM1KM2KM2.KM1KM2L1L2L3.3MEQSFU1FU2KM1SB1.KM2KM1KM2KM2.KM1KM2L1L2L3.FU1.3MEQS.KM2FU2KM1SB1KM2KM1KM2.L1L2L3.FU1FU2.3MEQSKM1SB1.KM2KM1KM2KM2.合上合上QS,按下正转启动按钮按下正转启动按钮SB2,常闭触点断开,互锁;常,常闭触点断开,互锁;常开触点闭合,开触点闭合,KM1线圈得电,线圈得电,
6、KM1主触点闭合,电动机正主触点闭合,电动机正转,转,KM1常开辅助触点闭合,自锁常开辅助触点闭合,自锁 L1L2L3.FU1FU2.3MEQSKM1SB1.KM2KM1KM2KM2.合上合上QS,按下反转启动按钮按下反转启动按钮SB2,常闭触点断开,互锁;常,常闭触点断开,互锁;常开触点闭合,开触点闭合,KM2线圈得电,线圈得电,KM2主触点闭合,电动机正主触点闭合,电动机正转,转,KM2常开辅助触点闭合,自锁常开辅助触点闭合,自锁FU2KM1SB1KM2KM1KM2.合上合上QS,按下按下正转启动按钮正转启动按钮SB2,反转停反转停止,正转启动。止,正转启动。闭合闭合得电得电闭合闭合L1L
7、2L3.FU1FU2.3MEQSKM1SB1.KM2KM1KM2KM2.U11V11W11V12U12W12U13V13 W13UV W01234567线码线码QSKM1KM2SB1SB2KHU11 V11 W11V12U12W12U11 V11 W11U12 V12U13V13 W13U12V12 W12U12V12W12U13V13 W13U13V13 W13L1L2L3UVW11SB333333224445500066677FU2SB1KM1.KM1102345FU2KM1SB1KM2KM1KM2.KM1KM210234567FU2KM1SB1KM2KM1KM2.01234567FU2K
8、M3SB1KM1KM2.KM1KM210234567KTKTKM1.FU2KM1SB1KM2KM1KM2.01234567KM1KM289FU2KM2SB1KM1KM.KM1KM10234567KTKTKM1.KM28FU2KM1SB1KM2KM1KM2.01234567QSKM1KM2SB1SB2KH11SB333333224445500066677FU2KM1SB1KM2KM1KM2.01234567.98QSSB1SB21SB333333KH1224766500079688KM1KM2SB4SB533779745FU2KM1SB1KM2KM1KM2.01234567.98KM1KM2QSSB1SB21SB333333KH1224766500079688KM1KM2SB4SB533779745FU2KM2SB1KM1KA.KM3KM310234567KTKTKM1.KM28KAKAKTKM391011QS1103KH12SB1323SB24650007988KM1KM245KM3KT000KA441011467449