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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,案例,：,电动机自由停车的时间较长，随惯性大小而不同，而某些生产机械要求迅速、准,确地停车，如镗床、车床的主电动机需快速,停车；起重机为使重物停位准确及现场安全,要求，也必须采用快速、可靠的制动方式,制动：,机械制动和电气制动,电气制动：,在电动机转子上加一个与转向相反,的制动电磁转矩，使电动机转速迅,速下降，或稳定在另一转速,反接制动,能耗制动,常用,三相异步电动机制动掌握电路,一、机械制动,当电动机的定子绕组断电后，利,用机械装置使电动机马上停转。,机械制动,电磁抱闸制动器,MZD1系列沟通单相制动电磁铁 TJ2系列闸瓦制动器,1线圈 2衔铁 3铁心 4弹簧,5闸轮 6杠杆 7闸瓦 8轴,电磁抱闸制动器构造示意图,电磁抱闸制动器工作原理示意图,1弹簧 2衔铁 3线圈 4铁心,5闸轮 6闸瓦 7杠杆,电源,电磁抱闸断电制动掌握线路,L1L2L3,FU1,FU2,KM,FR,SB2,SB1,KM,YB,QS,KM,FR,M,3,电磁抱闸断电制动掌握线路,L1L2L3,FU1,FU2,KM,SB2,SB1,KM,YB,QS,KM,合上电源开关QS,FR,FR,M,3,电磁抱闸断电制动掌握线路,L1L2L3,FU1,FU2,KM,SB2,SB1,KM,YB,QS,KM,按下SB2,KM线圈得电,FR,FR,M,3,电磁抱闸断电制动掌握线路,L1L2L3,FU1,FU2,KM,SB2,SB1,KM,YB,QS,KM,KM1自锁触头闭合,自锁，松开SB2,电磁抱闸线圈YB得电，使抱闸的闸瓦与闸轮分开,KM1主触头闭合,电动机起动运行,FR,FR,M,3,电磁抱闸断电制动掌握线路,L1L2L3,FU1,FU2,KM,SB2,SB1,KM,YB,QS,KM,停:,按SB1，接触器KM失电释放,电磁抱闸线圈YB也失电，在弹簧的作用下，闸瓦与闸轮紧紧抱住,FR,FR,M,3,电磁抱闸通电制动掌握线路,L1L2L3,FU1,FU2,KM1,FR,SB1,SB2,KM1,YB,QS,KM1,FR,M,3,KM2,KM2,KM1,电路组成分析,电磁抱闸通电制动掌握线路,L1L2L3,FU1,KM1,SB1,SB2,KM1,QS,KM1,KM2,KM1,合上电源开关QS,KM2,FR,FR,M,3,FU2,YB,KM2,电磁抱闸通电制动掌握线路,L1L2L3,FU1,KM1,SB1,SB2,KM1,QS,KM1,KM2,KM1,按下SB1,KM1线圈得电,KM2,FR,FR,M,3,FU2,YB,KM2,电磁抱闸通电制动掌握线路,L1L2L3,FU1,KM1,SB1,SB2,KM1,QS,KM1,KM2,KM1,KM1自锁触头闭合,自锁，松开SB1,KM1联锁触头断开，KM1主触头闭合,电动机起动运行,电磁抱闸线圈YB不得电,KM2,FR,FR,M,3,YB,KM2,FU2,电磁抱闸通电制动掌握线路,L1L2L3,FU1,KM1,SB1,SB2,KM1,QS,KM1,KM2,KM1,KM2,停,：,按下SB2,KM1线圈失电释放,KM2线圈得电，,KM2主触头闭合,电磁抱闸线圈YB得电，使闸瓦与闸轮紧紧抱住,FR,FR,M,3,YB,FU2,二、电气制动,电动机产生一个和电动机实际旋转方向相反的电磁转矩，使电动机快速停转。,一能耗制动,电动机切断沟通电源后，马上在定子线组的任意两相中通入直流电，利用转子感应电流受静止磁场的作用以到达制动目的。,M,3,L1L2L3,KM1,FR,SB1,KM1,SB2,KM2,KM1,KM2,FR,KM1,KT,KM2,V,U,W,QS,FU1,FU2,KT,KT,单向启动能耗制动自动掌握线路,KM2,电路组成分析,定子绕组直流电通路,KM2,V,KM2,L3,N,V,定子绕组直流电通路,L1L2L3,KM1,SB1,KM1,SB2,KM2,KM1,KM2,KM1,KT,KM2,QS,FU1,FU2,KT,KT,KM2,合上电源开关QS,按下SB1,KM1线圈得电,单向启动能耗制动自动掌握线路,KM2,V,M,3,FR,FR,V,U,W,L1L2L3,KM1,SB1,KM1,SB2,KM2,KM1,KM2,KM1,KT,KM2,QS,FU1,FU2,KT,KT,KM2,KM1自锁触头闭合,KM1主触头闭合,KM1联锁触头分断,单向启动能耗制动自动掌握线路,KM2,V,M,3,FR,FR,V,U,W,L1L2L3,KM1,SB1,KM1,SB2,KM2,KM1,KM2,KM1,KT,KM2,KM2,V,QS,FU1,FU2,KT,KT,KM2,按下SB2,KM1线圈失电,KM1自锁触头分断,KM1主触头分断,KM1联锁触头闭合,KM2线圈得电,KT线圈得电,单向启动能耗制动自动掌握线路,M,3,FR,FR,V,U,W,L1L2L3,KM1,SB1,KM1,SB2,KM2,KM1,KM2,KM1,KT,KM2,KM2,QS,FU1,FU2,KT,KT,KM2,KM2自锁触头闭合,KM2主触头分断闭合,电动机半波能耗制动,KM2联锁触头分断,KT瞬时闭合触头闭合,松开SB2,单向启动能耗制动自动掌握线路,V,M,3,FR,FR,V,U,W,L1L2L3,KM1,SB1,KM1,SB2,KM2,KM1,KM2,KM1,KT,KM2,KM2,V,QS,FU1,FU2,KT,KT,KM2,KT延时断开触头延时分断,KM2线圈失电,KT线圈失电,各触头复位,单向启动能耗制动自动掌握线路,M,3,FR,FR,V,U,W,FU2,FR,SB1,KM1,SB2,KM1,KM2,KT,KT,KT,KM2,KM2,KM1,M,3,L1L2L3,FU1,KM1,QS,FU3,VC,TC,FR,R,KM2,V,U,W,3,KM2,有变压器桥式整流能耗制动掌握线路,电路组成分析,FU2,SB1,KM1,SB2,KM1,KM2,KT,KT,KT,KM2,KM2,KM1,L1L2L3,FU1,KM1,QS,FU3,VC,TC,R,KM2,V,U,W,3,KM2,有变压器桥式整流能耗制动掌握线路,合上电源开关QS,按下SB1,KM1线圈得电,FR,M,3,FR,FU2,SB1,KM1,SB2,KM1,KM2,KT,KT,KT,KM2,KM2,KM1,L1L2L3,FU1,KM1,QS,FU3,VC,TC,R,KM2,V,U,W,3,KM2,有变压器桥式整流能耗制动掌握线路,KM1自锁触头闭合,KM1主触头闭合,KM1联锁触头分断,松开SB1,FR,M,3,FR,FU2,SB1,KM1,SB2,KM1,KM2,KT,KT,KT,KM2,KM2,KM1,L1L2L3,FU1,KM1,QS,FU3,VC,TC,R,KM2,V,U,W,3,KM2,有变压器桥式整流能耗制动掌握线路,按下SB1,KM1线圈失电,KM1自锁触头分断,KM1主触头分断,KM1联锁触头闭合,KM2线圈得电,KT线圈得电,FR,M,3,FR,FU2,SB1,KM1,SB2,KM1,KM2,KT,KT,KT,KM2,KM2,KM1,L1L2L3,FU1,KM1,QS,FU3,VC,TC,R,KM2,V,U,W,3,KM2,有变压器桥式整流能耗制动掌握线路,KM2自锁触头闭合,KM2主触头分断闭合,电动机半波能耗制动,KM2联锁触头分断,KT瞬时闭合触头闭合,松开SB1,FR,M,3,FR,FU2,SB1,KM1,SB2,KM1,KM2,KT,KT,KT,KM2,KM2,KM1,L1L2L3,FU1,KM1,QS,FU3,VC,TC,R,KM2,V,U,W,3,KM2,有变压器桥式整流能耗制动掌握线路,KT延时断开触头延时分断,KM2线圈失电,KT线圈失电,各触头复位,FR,M,3,FR,二反接制动,.反接制动原理,在停车时，把电动机反接，则其定子旋转磁场便反向旋转，在转子上产生的电磁转矩亦随之变为反向，成为制动转矩。,反接制动,单向启动反接制动掌握,M,3,L1L2L3,FU1,FU2,KM1,KM2,FR,SB1,KM1,SB2,KM2,KM1,KM2,FR,QS,KM1,n,KS,KM2,KS,单向启动反接制动掌握,L1L2L3,FU1,FU2,KM2,SB1,KM1,SB2,QS,KM1,n,KS,KM2,KS,合上电源,开关QS,M,3,KM1,FR,KM2,FR,KM1,KM2,单向启动反接制动掌握,L1L2L3,FU1,FU2,KM2,SB1,KM1,SB2,KM1,KM2,QS,KM1,n,KS,KM2,KS,按下SB1,KM1线圈得电,M,3,KM1,FR,KM2,FR,单向启动反接制动掌握,L1L2L3,FU1,FU2,KM2,SB1,KM1,SB2,KM1,KM2,QS,KM1,KS,KM2,KS,n,KM1自锁触头闭合,自锁，松开SB1,KM1主触头闭合,电动机起动，运行,在转速高到肯定值时，KS闭合,M,3,KM1,FR,KM2,FR,单向启动反接制动掌握,L1L2L3,FU1,FU2,KM2,SB1,KM1,SB2,KM1,KM2,QS,KM1,KM2,KS,n,停：,按下SB2,KM1失电释放,KM2线圈得电，KM2主触头闭合，电动机串联电阻反接，反接制动,KM2自锁触头闭合,M,3,KM1,FR,KM2,FR,KS,单向启动反接制动掌握,L1L2L3,FU1,FU2,KM2,SB1,KM1,SB2,KM1,KM2,QS,KM1,KM2,KS,n,停：,松开SB2,连续反接制动,M,3,KM1,FR,KM2,FR,KS,单向启动反接制动掌握,L1L2L3,FU1,FU2,KM2,SB1,KM1,SB2,KM1,KM2,QS,n,KM2,KS,当转速降低到肯定值时，KS断开,KM2线圈失电，各触头复位,M,3,KM1,FR,KM2,FR,KM1,KS,
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