10.三电平牵引逆变器的工作原理

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1、一脉冲整流器工作原理及其控制二三异步牵引电机控制3pp1Ta1Tb1Tc10SaiaZaC1u1C1u1Ta2Tb2Tc2-11aZbUdcoM0SbibUdcobc3~Ta3Tb3Tc3-11C2u2C2u2Zc0ScicTa4Tb4Tc4-1nn1(p)T,Ton,T,Toffi1i2i3i4定义开关函数为：Si0(o)T,Ton,T,Toffi2i3i1i4(iabc,,)-1(n)T,Ton,T,Toffi3i4i1i2该三电平拓扑一共有33=27种开关状态；3三电平牵引逆变器的27种开关状态表ModeSASBSCuaNubNucNuabub

2、cucaModeSASBSCuaNubNucNuabubcuca1nnn-1-1-100000015oop001-Ud/6-Ud/6Ud/30-Ud/2Ud/22nno-1-10-Ud/6-Ud/6Ud/30-Ud/2Ud/216opn01-10Ud/2-Ud/2-Ud/2Ud-Ud/23nnp-1-11-Ud/3-Ud/32Ud/30-UdUd17opo010-Ud/6Ud/3-Ud/6-Ud/2Ud/204non-10-1-Ud/6Ud/3-Ud/6-Ud/2Ud/2018opp011-Ud/3Ud/6Ud/6-Ud/20Ud/25noo-100-Ud/3Ud

3、/6Ud/6-Ud/20Ud/219pnn1-1-12Ud/3-Ud/3-Ud/3Ud0-Ud6nop-101-Ud/20Ud/2-Ud/2-Ud/2Ud20pno1-10Ud/2-Ud/20Ud-Ud/2-Ud/27npn-11-1-Ud/32Ud/3-Ud/3-UdUd021pnp1-11Ud/3-2Ud/3Ud/3Ud-Ud08npo-110-Ud/2Ud/20-UdUd/2Ud/222pon10-1Ud/20-Ud/2Ud/2Ud/2-Ud9npp-111-2Ud/3Ud/3Ud/3-Ud0Ud23poo100Ud/3-Ud/6-Ud/6Ud/20-Ud/

4、210onn0-1-1Ud/3-Ud/6-Ud/6Ud/20-Ud/224pop101Ud/6-Ud/3Ud/6Ud/2-Ud/2011ono0-10Ud/6-Ud/3Ud/6Ud/2-Ud/2025ppn11-1Ud/3Ud/3-2Ud/30Ud-Ud12onp0-110-Ud/2Ud/2Ud/2-UdUd/226ppo110Ud/6Ud/6-Ud/30Ud/2-Ud/213oon00-1Ud/6Ud/6-Ud/30Ud/2-Ud/227ppp11100000014ooo000000000输出线电压u一共有±U,±U/2,和0五种电平。abdcdc输出的相电

5、压u一共有±2U/3,±U/2,±U/3,aNdcdcdc±Udc/6,和0九种电平。4工作模式23(SaSbSc=poo)：pppTa1Tb1Tc1iZoSaaaC1u1C1u1nTa2Tb2Tc2paMoSiZbUdcoUobbbc3~dcnTa3Tb3Tc3C2u2C2u2pZScTTTocica4b4c4nnn开关T,T,T,T,T和T导通，T,T,T,T,a1b2b2b3c2c3a3b4b1b4T和T关断。c1c4uao=Udc/2,ubo=uco=0;+Zau=U/3,u=u=-U/6;NaNdcbNcNdc0.5Udcu=u=U/2,u=0.

6、abacdcbcZbZc-5工作模式10(SaSbSc=onn)：ppTa1Tb1Tc1poSaiaZaC1u1C1u1nTa2Tb2Tc2paZbUdcoMoSbibobc3~nTa3Tb3Tc3C2u2C2u2pZScocicTa4Tb4Tc4nnn开关T,T,T,T,T和T导通，T,T,T,T,a2b3b3b4c3c4a1b4b1b2T和T关断。c1c2uao=0,ubo=uco=-Udc/2;+ZaNuaN=Udc/3,ubN=ucN=-Udc/6;0.5Udcuab=uac=Udc/2,ubc=0.ZbZc-6工作模式22(SaSbSc=pon)

7、：pppTa1Tb1Tc1oSiaZaaC1u1C1u1nTa2Tb2Tc2paZbUdcoMoSbibb3~UdcocnTa3Tb3Tc3C2u2C2u2pZScocicTa4Tb4Tc4nnn开关T,T,T,T,T和T导通，T,T,T,T,a1b2b2b3c3c4a3b4b1b4T和T关断。c1c2+u=U/2,u=0,u=-U/2;ZaaodcbocodcUdcNuaN=Udc/2,ubN=0,ucN=-Udc/2;0.5UdcZbZcuab=ubc=Udc/2,uca=-Udc.-7工作模式19(SaSbSc=pnn)：ppTa1Tb1Tc1poS

8、aiaZa