1、complement D:D=1-DFourier analysis:Dc component=average valueActual output voltage waveform of buck converter EV+-MRLVDioEMuoiGPowerElectronics2728PowerElectronicsEMVDLVa)EMuoELV1VD1uoioV2VD2EMMR30PowerElectronicsELR+-V1VD1uoV3EMV2VD2ioV4VD3VD4MMulti-phase multi-channel DC/DC converterCLEMV1V2V3i1i2
2、i3VD3VD2L1L2L3iouou1u2u3VD1Isolated DC to DCconvertersSingle-ended converters Forward converter Flyback converterDouble-ended converters Half bridge Push-pull Full bridgeAccording to whether transformer current is uni-direction or bi-directional SuSiLiSOttttUiOOO+UiSVD1VD2LN1N3N2VD3UoW2W1W3TtNNUUon1
3、2io+UiSVDN1N2UoW1W2SuSiSiVDtontoffttttUiOOOOoffon12iottNNUU+S1S2VD1VD2LUiN1N2N3+udUo+C1C2W1W3W2S1S2uS1uS2iS1iS2iD1iS2tTttttttttonUiUiiLiLOOOOOOOOTtNNUUon12io+S1S2VD1VD2LUiN1N1N2N2UoS1S2uS1uS2iS1iS2iD1iS2tonTtttttttt2Ui2UiiLiLOOOOOOOOTtNNUUon12io2+N1S2S3S4VD1VD2VD4VD3LS1N2+-+-uduTUiUoW2W1S1(S4)S2(S3)uS1(uS4)uS2(uS3)iS1(iS4)iS2(iS3)iD1(iD4)iS2(iS3)tonTttttttttUiUiiLiLOOOOOOOOTtNNUUon12io2+VD1VD2L+VD1LVD3VD2VD4+V1V2L
