Power Electronics for Pune University  (English, J. S. Chitode)

3 Phase AC/DC Converters
Analysis of 3 phase full converter, Comparison with 3-phase semi converter, Effect of source impedance on single phase converters with analysis, Single phase and three phase dual converters (ideal and practical dual converter, Control schemes for non-circulating current type dual converter, Analysis of circulating current type dual converter.)
Triggering circuit for phase controlled rectifiers : Pulse forming circuits, Inverse cosine method, Microprocessor / microcontroller based firing circuit for 1 phase, 3 phase controlled rectifiers.  

Switched Mode DC/DC Converters
Control of DC/DC converters, Circuit diagram, Waveforms and operation (o/p voltage calculation) of step down chopper (Buck converter), Step up chopper (Boost converter) and 2-quadrant type C chopper. Circuit diagram, Waveforms, Operation, Analysis and design aspects of fly back converter (SMPS) including magnetics. Four quadrant chopper.

Special Purpose Converters
Resonant converter : Need for resonant converters : Circuit diagram, Waveforms and operation of SLR half bridge DC/DC converter in low frequency (discontinuous conduction) mode.
Cycloconverter : Single phase to single phase controlled cycloconverter using 3 pulse and 6 pulse converter groups. Voltage and frequency control circulating, Non-circulating current mode, Load and line harmonics, matrix converters and high frequency cycloconverters.

DC/AC Converter
Voltage source inverters : Half bridge and full bridge three phase bridge inverter square wave operation (180º or 120º), Frequency and voltage control, Voltage control and harmonic reduction in inverters. Three level inverter, Resonant inverters. Soft switched inverters PWM Converter as line side rectifier.
Current source inverter : 3 phase six step current source line commuted inverter, Inverter operation modes load commutated inverters with over excited synchronous machine load , Auto sequential current fed inverter, PWM inverter.

Cooling and Protection of Semiconductor Devices and their Applications
Cooling basic theory - Thermal resistance, Simple heat sink design calculations.
Types of cooling : a) Natural convection b) Forced air cooling c) Liquid cooling d) Vapour phase cooling Protection circuits : Snubbers, MOVs, di/dt inductor, Semiconductor fuses. Design of snubber circuit.
1) Electronic ballast : Characteristics of fluorescent lamps and advantages over conventional ballast.
2) HVDC transmission : One line diagram, Twelve pulse converter, Arrangement and advantages over HVAC  transmission.
3) HF induction heating
4) Electric welding
5) DC CT/PT
6) Protection circuits : Phase sequence monitoring, Under voltage monitoring. 

Power Factor Improvement Techniques and Power Quality
Power factor improvement : Phase angle control, Semiconverter operation of full converters, Asymmetric firing, Forced commutation, Sequence control of series converters, Comparative evaluation of schemes.

Power Quality : Types of power line disturbances, Sources of power line disturbances, Preventive and nullifying measurement techniques, Measurement of power line disturbances. Energy audit.