5EE1 POWER ELECTRONICS-III

Unit-1 Power Semiconductor Devices: Characteristics of Power Transistor, Thyristor, GTO, Power MOSFET and IGBT. Two-Transistor Model of Thyristor.
Unit-2 SCR: Construction and characteristics, specification and ratings, pulse transformer, optical isolators, methods of turn on: R, RC, UJT relaxation oscillator, Rating extension by series and parallel connections, string efficiency. Protection of SCR-Protection against over voltage, over current, dv/dt, di/dt, Gate protection.
Unit-3 Converters-I: Single Phase half & full wave converters with RL load, Single phase dual converters, Three phase half wave converters, Three phase full converters with RL load, Three phase dual converters.
Unit-4 Converters-II: Single and three-phase semi converters with RL load. Power Factor Improvement-Extinction angle control, symmetrical angle control, pulse width modulation control and sinusoidal pulse width modulation control. Inversion operation. Effect of load and source impedances.
Unit-5 DC-DC Converters: Choppers: Step Up/Down Copper, Chopper Configurations, analysis of type A Chopper Commutation of Choppers. Switched Mode Regulators-buck, boost, buck-boost and cuk regulator

Reference/Suggested Books
1. M H Rashid: Power Electronics, Circuits Devices and Applications, PHI
2. Ned Mohan: Power Electronics, John Wiley
3. M D Singh and K B Khanchandani: Power Electronics 2/e, TMH, 2008.
4. Krein P. T: Eleements of Power Electronics, Oxford.
5. P C Sen: Power Electronics, Tata McGraw-Hill, India.
6. C W Lander: Power Electronics, McGraw Hill
7. W Shepherd: Power Electronics and Motor Control, Cambridge Uni. Press.
8. P S Bimbhra: Power Electronics, Khanna Publishers.