Course Details
Subject {L-T-P / C} : EC3004 : Power Electronics { 3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Kamalakanta Mahapatra
Syllabus
Power Semiconductor Devices: Control characteristics of Power Semiconductor Devices, Types of Power Electronic Circuits. Power Semiconductor Diodes: Types, Characteristics, Reverse Recovery Characteristics, Forward and Reverse Recovery Time, Series and Parallel Connection. Thyristors: Characteristics, 2-Transistor Model, Turn on and Turn off, dv / dt and di / dt protection, Thyristor firing circuits, UJT, Gate Turn-off Thyristors (GTO), Triac, FET controlled Thyristor, MOS controlled Thyristors. Series and Parallel operation of Thyristors. Line Frequency Phase Controlled Rectifiers and Inverters: Principle of Phase Control, Gate Trigger Controller Circuit. Single Phase Converter,
Ideal Circuit with no source inductance and constant output d. c. current. Semi Converters and Full converter, Dual converter. Wave form and performance calculation, Effect of finite source inductance, Inverter Mode Operation. Three Phase Converter : Ideal Circuit without source inductance with constant output d. c. current, Three Phase Full Converters, Wave form Performance, Input Line Currents, Effect of Source Inductance and Commutation, Inverter mode of operation, A. C. Voltage Waveform. A. C. Voltage Controller: On-off control, Phase Control, R-Load, R-L Load, Cycloconverters Principles. Power Transistors: BJT Switching Characteristics and Switching limits base drive control Power MOSFET, Switching characteristics and gate drive, IGBT and STT, Isolation of gate base drive. DC-DC Switch Mode Converters (Choppers) : Principles of step-down chopper, step down chopper with R-L load, Principle of stepup operation, control of DC-Dc converter by PWM, Switching mode regulator, Step down (Back) Converter, Step-up (Boost) converter in Continuous Conduction mode. Thyristor Commutation Technique: Self Commutation, Impulse Commutation, Complementary Commutation. The Impulse Commutated Chopper. Pulse Width Modulated Inverters: Single phase half bridge and full bridge inverter, 3-phase inverter-180 degree and 120-degree conduction mode, Pulse Width Modulated Switching scheme for voltage control, SPWM and modified SPWM of 1-phase inverters, PWM with unipolar and Bipolar Voltage Switching, PWM in 3-phase VSI, Square wave operation, Switching Utilisation. Harmonic reduction by programmed harmonic elimination switching, Current Source Inverter, Single phase CSI Inverter Circuit Design.
Course Objectives
- To learn basics of the power electronic devices, circuits and their applications
Course Outcomes
Student would learn the basics of the power electronic devices, circuits and their applications with special emphasis on circuit design.
Essential Reading
- M. H. Rashid, Power Electronics-Devices Circuits and Application, Prentice Hall of India, 2003
- M D Singh and K B Khanchandani, Power Electronics, Mc GRAW-Hill
Supplementary Reading
- N. Mohan, T. M. Undeland and W. P. Robbies, Power Electronics, Converters, Applications and Design, John Wiley
- Kassakian et.al, Principles of Power Electronics, Pearson