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Characteristics of Semiconductor Power Devices:

Thyristor, power
MOSFET and IGBT- Treatment should consist of structure, Characteristics,
operation, ratings, protections and thermal considerations. Brief introduction
to power devices viz. TRIAC, MOS controlled thyristor (MCT), Power
Integrated Circuit (PIC) (Smart Power), Triggering/Driver, commutation and
snubber circuits for thyristor, power MOSFETs and IGBTs (discrete and IC
based).Concept of fast recovery and schottky diodes as freewheeling and
feedbackdiode.

Controlled Rectifiers:

Single phase: Study of semi and full bridge
converters for R, RL, RLE and level loads. Analysis of load voltage and
input current- Derivations of load form factor and ripple factor, Effect
of source impedance, Input current Fourier series analysis of input
current to derive input supply power factor, displacement factor and
harmonicfactor

Choppers:

Principle of chopper operation, control strategies, Analysis of
Step-Up, Step-down and Step-Up/Down chopper.Quadrant operations of
Type A, Type B, Type C, Type D and type E choppers, Control
techniques for choppers – TRC and CLC, Detailed analysis of Type A
chopper. Step up chopper. Multiphase Choppers

Single-phase inverters:

Principle of operation of full bridge square
wave, quasi-square wave, PWM inverters and comparison of their
performance. Driver circuits for above inverters and mathematical
analysis of output (Fourier series) voltage andharmonic control at output
of inverter (Fourier analysis of output voltage). Filters at the output of Single-phase inverters: Principle of operation of full bridge square
wave, quasi-square wave, PWM inverters and comparison of their
performance. Driver circuits for above inverters and mathematical
analysis of output (Fourier series) voltage andharmonic control at output
of inverter (Fourier analysis of output voltage). Filters at the output of

Switching Power Supplies:

Analysis of fly back, forward converters for
SMPS, Resonant converters – need, concept of soft switching, switching
trajectory and SOAR, Load resonant converter – series loaded half bridge
DC-DC converter.

Applications:

Power line disturbances, EMI/EMC, power conditioners.
Block diagram and configuration of UPS, salient features of UPS,
selection of battery and charger ratings, sizing of UPS. Separately excited
DC motor drive. P M Stepper motor Drive.,DC Chopper drives,Speed
control of Induction Motors .cooling and thermal