Syllabus Power Electronics - (303142) Credits Examination Scheme Th 03 ISE 30 Marks PR 02 ESE 70 Marks PR 50 Marks Unit 01 Power Semi-Conductor Devices Construction, Static and dynamic Characteristics, specifications/rating of SCR, Triggering Circuits (R, R-C, UJT), Commutation Circuits (class C & D), Protection (over voltage, over current, and Thermal), Gate Turn Off (GTO) Thyristor (Construction, Working and Application), TRIAC - four mode operation, triggering of TRIAC using DIAC, Application-light dimmer. (Chapter - 1) Unit 02 Transistor based Devices and DC-DC converter Transistor based Devices : MOSFET & IGBT- Construction, working, Static and Dynamic Characteristics DC-DC converter : Principle of operation of chopper, classification on the basis of operating quadrants (A, B, C, D, E), Control techniques : CLC, TRC, PWM and FM Techniques. Analysis of Step-up Chopper and Numerical with RLE load. Buck Boost Chopper (Descriptive Treatment), Applications - Chargers for Battery operated vehicles. (Chapter - 2) Unit 03 Single Phase AC-DC Converter Single phase Converter : Fully controlled converter, Half controlled converter (Semi- converter) - Operation of all converters with R & RL load, derivation of Average and RMS output voltage, power factor, THD, TUF. Numerical based on output voltage and current calculations, Single phase dual converter (Descriptive treatment only), Application-Speed control of DC motor. (Chapter - 3) Unit 04 Three Phase Converter and AC Voltage Regulator Three phase converters : Fully controlled converter, Half controlled converter (Semi converter) - Operation of all converters with R, RL load, derivation of Average and RMS output voltage. Numerical based on output voltage and current calculations. AC voltage regulator : Single phase AC Voltage regulator; operation with R and RL Load, derivation of Average and RMS output voltage. Concept of two stage AC voltage regulator (Descriptive treatment only). (Chapter - 4) Unit 05 Single phase DC-AC Converter (Transistor based) Full bridge VSI, derivation of output voltage and current, Numerical, current source inverter with ideal switches and load commutated CSI, Voltage control techniques, Application - UPS. (Chapter - 5) Unit 06 Three phase DC-AC Converter (Transistor based) Three phase VSI for 120° and 180° modes of operation and their comparison, PWM based VSI, voltage control and harmonic elimination techniques (Single Pulse Modulation, Multilevel Control), Multilevel Converter concept its classification (Neutral Point Clamped Converter, Flying Capacitor Converter, cascaded multilevel converter) and their comparison, Application - Speed control of 3 phase Induction motor. (Chapter - 6)