Power Electronic Circuits (KIIT)

Introduction to Power Electronics:
Comparison of power devices operating in the switch mode to those operating in the active region.

Power Electronic Devices:
Thyristor characteristics, Turn ON methods, Dynamic Characteristics of thyristors, Ratings, Protection, Two Transistor Model of thyristor, Characteristics and construction of Power MOSFETS, Comparison between Power MOSFET and Power BJT, Characteristics and construction of IGBT, GTO – turn on and turn off methods, SiC based power devices, TRIAC and DIAC Characteristics and applications.

AC to DC Converters:
Single Phase Converters – Half Wave, with R, RL, RLE load and effect of free Wheeling diode, Single Phase half and full controlled full Wave converters with R and RLE Load, Line Commutated Inverters, 3 Phase half and fully controlled rectifiers, Effect of source Inductance on performance of single phase converters.

DC to DC Converters:
Step up and Step Down choppers, 2 and 4 quadrant choppers for control of DC motor. Switch Mode Power Supply (SMPS): Advantage of Switch Mode Power Supply over Conventional Power Supply, Flyback converters.

Inverters:
Single Phase Half Bridge and Full Bridge Inverters, 3 Phase Inverters, 180° and 120° conduction, Voltage Control of inverters: Sinusoidal Pulse Width Modulation, Concept of multi level inverters, Concept of current source inverters.

AC to AC Converters:
Single phase AC to AC Controllers with R and RL load, Single phase mid-point type Cycloconverters with R and RL load. Single phase bridge type cyclo-converter with R-L Load.

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