《星三角降压启动电机控制电路》由会员分享，可在线阅读，更多相关《星三角降压启动电机控制电路（14页珍藏版）》请在金锄头文库上搜索。
1、星三角降压启动控制线路,星三角降压启动控制线路,全压起动的缺点：,为什么要采用降压起动？,三相异步电动机全压启动时启动电流一般为额定电流的47倍,电力变压器容量不够大电动机功率较大时将导致电源变压器的输出电压下降,电动机的启动转矩减小电动机启动困难影响，同一供电线路中其他电器设备的正常工作,较大容量的电动机需要采用降压启动,星三角降压启动控制线路,降压起动的方法：,本课主讲,星三角降压启动控制线路,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,KM2,KM1,KM1,KM3,KM3,FR,SB1,SB2,QF,FU1,FU2,按下启动按钮SB2,星三角降压启动控制线路,星三角降压起
2、动控制线路图,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,KM2,KM1,KM1,KM3,KM3,FR,SB1,SB2,QF,FU1,FU2,接触器KM1、KM3、KT线圈得电,星三角降压启动控制线路,星三角降压起动控制线路图,接触器KM1常开辅助触点闭合,接触器KM1主触点闭合,接触器KM3主触点闭合,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,KM2,KM1,KM1,KM3,KM3,FR,SB1,SB2,QF,FU1,FU2,KM3常闭触点断开,星三角降压启动控制线路,星三角降压起动控制线路图,M,3,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,K
3、M2,KM1,KM1,KM3,KM3,FR,SB1,SB2,QF,FU1,FU2,电机以星形连接启动,星三角降压启动控制线路,星三角降压起动控制线路图,M,3,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,KM2,KM1,KM1,KM3,KM3,FR,SB1,SB2,QF,FU1,FU2,KT延时闭合触点闭合,KT延时断开触点断开,星三角降压启动控制线路,星三角降压起动控制线路图,一段时间之后,M,3,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,KM2,KM1,KM1,KM3,KM3,FR,SB1,SB2,QF,FU1,FU2,KM3线圈失电,KM3常闭触点闭合,KM
4、3主触点断开,星三角降压启动控制线路,星三角降压起动控制线路图,M,3,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,KM2,KM1,KM1,KM3,KM3,FR,SB1,SB2,QF,FU1,FU2,KM2线圈得电,星三角降压启动控制线路,星三角降压起动控制线路图,M,3,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,KM2,KM1,KM1,KM3,KM3,FR,SB1,SB2,L2,L1,L3,QF,FU1,FU2,KM2常闭触点打开,KM2常开触点闭合,KM2主触点闭合,KT线圈失电,星三角降压启动控制线路,星三角降压起动控制线路图,M,3,KM1,KM3,KT,KM2,KT,KT,KM2,KM2,KM2,KM1,KM1,KM3,KM3,FR,SB1,SB2,QF,FU1,FU2,电机全压运行,星三角降压启动控制线路,星三角降压起动控制线路图,接三角形电机全压运行,星三角降压启动控制线路,工作原理：,
