HD16EC : POWER ELECTRONICS AND DEVICES

POWER SEMICONDUCTOR DEVICE

Introduction, Thyristorised Power Controllers, Classification Of Power Controllers, Characteristics And Specification Of Power Devices, Comparison Of Power Devices

THYRISTOR

Introduction, Modes Of Operation, Dynamic Characteristics, Tharistors Gate Characteristics, Rating And Protection, Firing Circuits, Other Thyristors

TURN – OFF METHOD

Introduction, Natural Commutation (Class F : Line Commutation), Forced Commutation, Self Commutation By Resonating Load (Class A), Impulse Commutation (Class D : Auxiliary Voltage Commutation), Complementary Commutation (Class C), External Pulse Commutation (Class E)

CONTROLLED RECTIFIERS

Introduction, Principle Of Phase Controlled Converter Operation, Single Phase Semi Converters (Half Bridge Converter), Single Phase Full Convertors, Three Phase Half Wave Converters, Three Phase Semiconverters, Three Phase Full Converters

INVERTERS

Introduction , Principle, Performance Parameters, Single Phase Bridge Inverter, Voltage Control Of Single Phase Inverters, Harmonic Reduction, Current Source Inverters

CHOPPERS

Introduction, Principle Of Step Down Operation, Step Down Chopper With Rl Load, Principle Of Step Up Operation, Performance Parameters, Chopper Classification, Effects Of Source And Load Inductance, Applications Of Choppers

AC VOLTAGE CONTROLLER

Introduction, Principle Of On – Off Control, Principle Of Phase Control, Single Phase Controller With Resistive Loads (Bidirectional Controllers), Single Phase Controllers With Inductive Loads, Merits, Demerits And Applications Of Ac Voltage Controllers