Applications of Power Electronics, Power semiconductor devices, Control Characteristics. Types of power electronic circuits. Peripheral effects. –
Power BJT’s – switching characteristics, switching limits, base drive control. Power MOSFET’s – switching characteristics, gate drive. IGBT’s, di/dt and dv/dt limitations. Isolation of gate and base drives. Simple design of gate and base drives. –
Introduction, characteristics. Two Transistor Model. Turn-on and turn-off. di/dt and dv/dt protection. Thyristor types. Series and parallel operation of Thyristors. Thyristor firing circuits. Simple design of firing circuits using UJT, op-amps, and digital IC’s. –
Introduction. Natural Commutation. Forced commutation: self commutation, impulse commutation, resonant pulse commutation and complementary commutation. –
Introduction. Principle of ON-OFF and phase control. Single-phase bidirectional controllers with resistive and inductive loads.–
Introduction. Principle of phase controlled converter operation. Single- phase semi-converters. Full converters. Three-phase half-wave converters. Three-phase full-wave converters. –
Introduction. Principle of step-down and step-up chopper with R-L load. Performance parameters. Chopper classification. Analysis of impulse commutated thyristor chopper (only qualitative analysis) –
Introduction. Principle of operation. Performance parameters. Single-phase bridge inverters. Threephase inverters. Voltage control of single-phase inverters – single pulse width, multiple pulse width, and sinusoidal pulse width modulation. Current source inverters. Variable D.C. link inverter. –