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Power Electronics. Power Semiconductor DevicesApplications of power electronics, Power semiconductor devices, Control characteristics, Types of power electronic circuits.
Peripheral effects. Isolation of gate and base drives. Simple design of gate and base drives. Two transistor model. Thyristor types, Series and parallel operation of thyristors.
Thyristor firing circuits. Commutation Techniques Natural commutation. Forced commutation : Self commutation, Impulse commutation, Resonant pulse commutation and complementary commutation. Single-phase bidirectional controllers with resistive and inductive loads.
Controlled RectifiersPrinciple of phase controlled converter operation. Single phase semiconverters. Full converters. Three phase half wave converters. Three phase full wave converters. Performance parameters.
Chopper classification. Analysis of impulse commutated thyristor chopper only qualitative analysis. InvertersIntroduction, Principle of operation. Single phase bridge inverters.
Three phase inverters. Voltage control of single phase inverters, Single pulse width, Multiple pulse width, and sinusoidal pulse width modulation. Current source inverters. Variable D. Power Electronics J. Chapter 4 Commutation Techniques 4 1 to 4. References R1.