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SYLLABUS

Unit - 1 :

Power Semi-conductor Devices Study of switching devices, SCR, TRIAC, GTO, BJT, MOSFET, IGBT and IGCT – Static characteristics: SCR, MOSFET and IGBT – Triggering and commutation circuit for SCR – Introduction to driver and Snubber circuits.

Unit - 2 :

Phase-controlled Converters 2-pulse, 3-pulse and 6-pulse converters – Performance parameters – Effect of source inductance – Firing schemes for converter – Dual converters, Applications – Light dimmer, Excitation system, Solar PV systems.

Unit - 3 :

DC To DC Converters Step-down and step-up chopper – Control strategy – Introduction to types of choppers – A, B, C, D and E – Switched mode regulators – Buck, Boost, Buck-Boost regulator, Introduction to resonant converters, Applications – Battery operated vehicles.

Unit - 4 :

Inverters Single phase and three phase voltage source inverters (both 120° mode and 180° mode) – Voltage and harmonic control – PWM techniques: Multiple PWM, Sinusoidal PWM, Modified sinusoidal PWM – Introduction to space vector modulation – Current source inverter, Applications – Induction heating, UPS.

Unit - 5 :

AC To AC Converters Single phase and three phase AC voltage controllers – Control strategy – Power factor control – Multistage sequence control – Single phase and three phase cyclo converters – Introduction to matrix converters, Applications – Welding.