1、Power ElectronicsChapter 5 DC to DC Converters(Choppers)PowerElectronics2PowerElectronics3PowerElectronics4complement D:D=1-DPowerElectronics5Fourier analysis:Dc component=average valuePowerElectronics6PowerElectronics7PowerElectronics8PowerElectronics9Actual output voltage waveform of buck converte
2、rPowerElectronics10PowerElectronics11 PowerElectronics12PowerElectronics13PowerElectronics14PowerElectronics15PowerElectronics16PowerElectronics17PowerElectronics18PowerElectronics19PowerElectronics20PowerElectronics21PowerElectronics22PowerElectronics23PowerElectronics24PowerElectronics25PowerElect
3、ronics26PowerElectronics27EV+-MRLVDioEMuoiGPowerElectronics2829PowerElectronicsEMVDLVa)EMuoPowerElectronics30ELV1VD1uoioV2VD2EMMR31PowerElectronicsPowerElectronics32ELR+-V1VD1uoV3EMV2VD2ioV4VD3VD4MPowerElectronics33Multi-phase multi-channel DC/DC converterCLEMV1V2V3i1i2i3VD3VD2L1L2L3iouou1u2u3VD1Pow
4、erElectronics34PowerElectronics35Isolated 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 PowerElectronics36SuSiLiSOttttUiOOO+UiSVD1VD2LN1
5、N3N2VD3UoW2W1W3TtNNUUon12ioPowerElectronics37+UiSVDN1N2UoW1W2SuSiSiVDtontoffttttUiOOOOoffon12iottNNUUPowerElectronics38+S1S2VD1VD2LUiN1N2N3+udUo+C1C2W1W3W2S1S2uS1uS2iS1iS2iD1iS2tTttttttttonUiUiiLiLOOOOOOOOTtNNUUon12ioPowerElectronics39+S1S2VD1VD2LUiN1N1N2N2UoS1S2uS1uS2iS1iS2iD1iS2tonTtttttttt2Ui2UiiLiLOOOOOOOOTtNNUUon12io2PowerElectronics40+N1S2S3S4VD1VD2VD4VD3LS1N2+-+-uduTUiUoW2W1S1(S4)S2(S3)uS1(uS4)uS2(uS3)iS1(iS4)iS2(iS3)iD1(iD4)iS2(iS3)tonTttttttttUiUiiLiLOOOOOOOOTtNNUUon12io2PowerElectronics41+VD1VD2L+VD1LVD3VD2VD4+V1V2LPowerElectronics4242
