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1、三相桥式全波可控整流电路三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LuD1D3D5D2D4D6ABC三相桥式不可控整流电路D1D3D5D2D4D6ABCR三相桥式不可控整流电路三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian Lu三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LuVT1VT3VT5VT2VT4VT6ABCR三相桥式可控整流电路三相桥式全波可控整流电
2、路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LuVT1VT3VT5VT2VT4VT6ABCR三相桥式可控整流电路01三个晶闸管共阴极连接时,阳极电位高的晶闸管导通02共阳极连接时,阴极电位低的晶闸管导通u2 ud1ud2u2Luduabuacuabuacubcubaucaucbuabuacuabuacubcubaucaucbuabuacuaucubt1OOOtOiVT1uVT1 0ttt0三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LubacTn负负载载ia
3、idudVT1VT3VT5VT4VT6VT2d2d1负载bacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载bacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian Luu2 ud1ud2u2Luduabuacuabuacubcubaucaucbuabuacuabuacubcubaucaucbuabuacuaucubt1OOOtOiVT1uVT1 0 tttbacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2
4、d1负载三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LubacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载u2 ud1ud2u2Luduabuacuabuacubcubaucaucbuabuacuabuacubcubaucaucbuabuacuaucubt1OOOtOiVT1uVT1 0 ttt三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LubacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d
5、2d1负载电路特点电路特点1ud一周期脉动6次,脉动波形一样,三相桥式整流又称6脉波整流。u2ud1ud2uaucubt1O 0 t三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LubacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载电路特点电路特点2任何时刻共阴极组和共阳极组各有1个管导通,且不能处于同一相。u2ud1ud2uaucubt1O 0 t三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LubacTn负负
6、载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载电路特点电路特点3变压器副边的三相绕组中,一组提供正电流,一组提供负电流。u2ud1ud2uaucubt1O 0 t三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LubacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载电路特点电路特点46只晶闸管触发脉冲的相位关系:6只晶闸管的触发脉冲顺序为:VT1VT2VT3VT4VT5VT6VT1触发脉冲相位依次相差60。三相桥式全波可控整流电路San Xiang Qiao Shi Quan
7、 Bo Ke Kong Zheng Liu Dian LubacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载电路特点电路特点46只晶闸管触发脉冲的相位关系:共共阴极组的三个晶闸管阴极组的三个晶闸管1、3、5的的触发脉冲依次相差触发脉冲依次相差120,共阳极组的共阳极组的三个晶闸管三个晶闸管4、6、2的触发脉冲依次相的触发脉冲依次相差差120。三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LubacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载电路特点电路特点46只
8、晶闸管触发脉冲的相位关系:同同一相的上下两个桥臂,即一相的上下两个桥臂,即VT1与与VT4,VT3与与VT6,VT5与与VT2,脉冲,脉冲相差相差180。三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian Luu2 ud1ud2u2Luduabuacuabuacubcubaucaucbuabuacuabuacubcubaucaucbuabuacuaucubt1OOOtOiVT1uVT1 0ttt0三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian Lu
9、bacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载如何能在如何能在触发触发VTVT2 2时保时保证证VTVT1 1仍处于仍处于导导通?通?三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian LubacTn负负载载iaidudVT1VT3VT5VT4VT6VT2d2d1负载u2ud1ud2uaucub t1O t =0o1 13 35 52 24 46 61 13 35 51 13 35 52 24 46 62 24 41 11 13 35 55 51 13 31 13 33 35 56 62 24 46 62 22 24 44 46 62 24 4宽脉冲双窄脉冲ug三相桥式全波可控整流电路San Xiang Qiao Shi Quan Bo Ke Kong Zheng Liu Dian Luud1ud2 =30oiaOtOtOtOtuduabuacuaubuct1uabuacubcubaucaucbuabuacuabuacubcubaucaucbuabuacuVT1=60oud1ud2uduacuacuabuabuacubcubaucaucbuabuacuaubucOtt1OtOtuVT1