Chaper 3：Phase-Controlled Converters(ACDC).pptVIP

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Chaper 3：Phase-Controlled Converters(ACDC).ppt

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Chaper 3：Phase-Controlled Converters(ACDC)

Power ElectronicsChapter 3: Phase-Controlled Converters(Rectifiers) Resistive load, α = 30o Resistive load, α = 60o Resistive load, α = 30o Resistive load, α = 60o Inductive load, α = 0o Inductive load, α =30o Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters 2.5 High power controlled rectifier 2.5.1 Double-star controlled rectifier 2.5.2 Connection of multiple rectifiers Chapter 3 : Phase-Controlled Converters 2.5.1 Double-star controlled rectifier Chapter 3 : Phase-Controlled Converters Effect of interphase reactor (inductor,transformer) Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters 2.5.2 Connection of multiple rectifiers Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Chapter 3 : Phase-Controlled Converters Sequential control of multiple series-connected rectifiers Chapter 3 : Phase-Controlled Converters 2.6 Inverter mode operation of rectifiers Chapter 3 : Phase-Controlled Converters Inverter mode operation of rectifiers Rectifier and inverter mode operation of single-phase full-wave converter Chapter 3: Phase-Controlled Converters Necessary conditions for the inverter mode operation of controlled rectifiers There must be DC EMF in the load and the direction of the DC EMF must be enabling current flow in thyristors. (In other word EM must be negative if taking the ordinary output voltage direction as positive.) α 90o so that the output voltage Ud is also negative. Chapter 3 : Phase-Controlled Converters Inverter mode operation of 3-phase bridge rectifier 2.7 Thyristor-DC Motor System Chapter 3: Phase-Controlled Converters Chapter 3: