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Unit-1 Introduction-Various power semiconductor switching devices, Types of power electronic converters

Power diode- construction, working, characteristics, Types of power diode and comparison

SCR- construction, operating modes, I-V Characteristics, Turn-on methods

Switching charateristics of SCR

Two trasistor analogy of SCR, solved problems, TRIAC-Construction and I-V Characteristics

TRIAC-Modes of operation, GTO- Construction, working

GTO- I-V Characteristics, Switching charateristics, Gate drive circuit, comparison with SCR

Power BJT- construction, Working, static and switching charateristics

Power MOSFET- construction, Working, static and switching charateristics

IGBT- construction, Working, static and switching charateristics, Comparison of Power BJT, Power MOSFET and IGBT

Firing circuit of Thyristor- various triggering circuits

Turn of methods (Commutation) of SCR- Class A, B, C, D, E and class F commutation

Driver circuits-Power BJT,Power MOSFET, IGBT

Thyristor protection circuits, Snubber design of Thyristor

Transistor Protection circuits-Turn-on and Turn-off snubber, Thyristor voltage ratings

Thyristor current rating ond other ratings, series connection of SCR, Unequal voltage distribution in static and dynamic conditions

Static and dynamic equivalent circuit, Design equations, solved problems, Parallel connection of SCRs and effects of unequal current distribution

Voltage and Current ratings of Transistors, Device selection Unit 2- Half wave phase controlled rectifier with R Load

Half wave controlled rectifier with RL load(with and without freewheeling diode)

Half wave controlled rectifier with RLE load

Single phase semi converter - R load

Single phase semi converter - RLE load, inherent freewheeling

Single phase full converter -mid point and bridge type, rectification mode

Single phase full converter (bridge type)- Inversion mode

solve dproblems in single phase converters

Additional problems, Performance parameters of semi converter

Performance parameters of full converter, solving problems in semi converter and full converter

Effect of source inductance - single phase full converter

Three phase half wave controlled rectifier

Three phase semi converter

Three phase full converter

Single phase dual converter- circulating and non circulating current mode

Numerical examples in three phase converter, Demo for developing power electronic circuits in MATLAB/SIMULINK

Unit 3- DC chopper-Principle of operation Control strategies (TRC,CLC), Step up and step down chopper

Ste up/step down choppwe, Numerical problems in chopper circuits

Chopper configurations- one quadrant, two quadrant choppers

Four quadrant chopper, Switched mode power converters- Buck converter

Analysis of Buck converter- Problem

Boost regulator- operating modes, design equations, problem

Buck Boost regulator- operating modes, design equations, problem

Cuk converter- operating modes

Design equations of Cuk converter, Forward converter- operating modes and equations

Flyback converter- operating modes and equations,Push pull converter, Ac voltage controllers- control strategies

On-off control(Integral cycle control), Numericsl problems, Phase angle control-single phase half wave ac voltage controller

Single phase full wave AC voltage controller with R load-various configurations

Single phase full wave AC voltage controller with RL load, gate pulse requirements, Numerical problems

Three phase half wave AC voltage controller

Three phase full wave AC voltage controller

Three phase bidirectional delta connected controller, Step up cycle converter- mid point type

Step up cyclo converter-Bridge type, Step down cyclo converter- mid point and bridge type

Unit 4- Single phase half bridge and full bridge Voltage Source Inverter (VSI)- R, RL, RLC overdamped and RLC underdamped loads

Three phase voltage source inverter-180 degrees and 120 degrees conduction mode

Single phase and Three phase current source inverter, Inverter voltage control (external voltage control)- output AC voltage control, input DC voltage control

Inverter voltage control (internal control)- Analysis of Single PWM, Multiple PWM

Sinusoidal PWM, Solved problems in VSI and PWM Inverter

Various harmonic reduction techniques

Space Vector Modulation

Revision, Applications, Discussion of Part -C questions