多重逆变电路和多电平逆变电路PPT课件

1、UdT1T2u1u2uo图5-20=60图5-20 二重单相逆变电路12060180tOtOtO三次谐波三次谐波u1u2uo图5-21图5-21 二重逆变电路的工作波形UVWNT1A1T2B1A21C1B21A22C21B22C22uUNuU2uU1Ud图5-22图5-22 三相电压型二重逆变电路 图5-23UA21UUNUU2-UB22UU1(UA1)图5-23 二次侧基波电压合成相量图 3:1tOtOtOtOtO3131)(1+)图5-24UU1UA21-UB22UU2UUN(UA1)EdEd32Ed31Ed32Ed(1+Ed31Ed图5-24 三相电压型二重逆变电路波形图 nktnntU

2、usin)1(1sin32dU1ddU1178.06UUUnUUdU1n6(5-23)ddUN156. 162UUUUN1dUNn162UnnUU+-图5-25+UV+WUdVD1V11OV12VD11VD12VD4V41V42VD41VD42iULsRs图5-25 三电平逆变电路 三电平逆变电路三电平逆变电路 图5-25，也称中点钳位型中点钳位型 （Neutral Point Clamped）逆变）逆变 电路电路每桥臂由两个全控器件串联构成，两者中点通过钳位二极管和直流侧中点相连 负载a)b)图5-1tS1S2S3S4iouoUduoiot1t2ttttRLCOOOOiit1b)a)图5-2

3、EdLdVT1VT2VT3VT4uoioiduouoioiouVTiVT1iVT4iVT2iVT3uVT1uVT4SVT负载+-图5-3CL+VDSCVT负载+LSVT负载VDb)a)图5-4+-CRL图5-5UdV1V2V3V4VD1VD2VD3VD4uoio+-RLa)ttOOONb)图5-6UdiouoV1V2VD1VD2uoUm-Umiot1t2t3t4t5t6V1V2V1V2VD1VD2VD1VD2Ud2Ud2+-CRLtOtOtOtOtOa)b)图5-7UdV1V2uoioV3V4VD1VD2VD3VD4uG1uG2uG3uG4uoiot1t2t3iouo负载+-图5-8iouoU

4、dV1V2VD1VD2NN+-UVW图5-9V1V2V3V4V5V6VD1VD2VD3VD4VD5VD6Ud2Ud2tOtOtOtOtOtOtOtO图5-10a)b)c)d)e)f)g)h)uUNuUNuUViUiduVNuWNuNNUdUd2Ud3Ud62 Ud3UVW图5-11idUdVT1VT2VT3VT4VT5VT6ABCRL图5-12LdIdVT1VT2VT3VT4LT1LT2LT3LT4uoiotOtO图5-13tOtOtOtOtOtOuG1,4uG2,3iTioIdt1t2t3t4t5t6t7tuotuABttIdiVT1,4iVT2,3uVT2,3uVT1,4tOtOtOtO图

5、5-14IdiViWuUViUM3UVW+-图5-15LIdC1C2C3C4C5C6VD1VD2VD3VD4VD5VD6UdVT1VT2VT3VT4VT5VT6- +U VW+ -U VWa)+ -U VWb)- +UVWc)d)图5-16VT1VT2VT3VD1VD2VD3C13IdVT1VT2VT3VD1VD2VD3C13IdVT1VT2VT3VD1VD2VD3C13IdVT1VT2VT3VD1VD2VD3C13IdiViViU=Id-iVttOuOi图5-17UCOuC13uC5uC3-UCOIdiUiVt1t2t3MS3BQ脉冲分配器UVW图5-18VT1VT2VT3VT4VT5VT6

6、UdUdMOOOOOttttOttuVT4导通uUuVuWiViWiUudMVT1导通VT3导通VT6导通VT5导通VT2导通uVT1图5-19UdT1T2u1u2uo图5-20=6012060180tOtOtO三次谐波三次谐波u1u2uo图5-21UVWNT1A1T2B1A21C1B21A22C21B22C22uUNuU2uU1Ud图5-22图5-23UA21UUNUU2-UB22UU1(UA1)tOtOtOtOtO3131)(1+)图5-24UU1UA21-UB22UU2UUN(UA1)EdEd32Ed31Ed32Ed(1+Ed31Ed+-图5-25+UV+WUdVD1V11OV12VD11VD12VD4V41V42VD41VD42iULsRsB C A 690V 690V 690V 690V 690V 690V 690V 690V 690V 690V 690V 690V 690V 690V 690V 3450V 相相电电压压 6000V 线线电电压压 + 2 4 + 2 4 + 2 4 + 1 2 + 1 2 + 1 2 + 0 + 0 + 0 - 1 2 - 1 2 输输入入： A C 6 k V / 5 0 H z - 1 2 + 2 4 + 2 4 + 2 4 输输入入移移相相隔隔离离变变压压器器功率单元A 1功率单元B 1功率单元C 1功率单