This notes contain following topics.
Thyristors, Static V-I Characteristics of SCR, TRIAC, GTO & IGBT, Turn-On & Turn-OFF
Mechanism of SCR, Gate Turnoff Thyristor (GTO) .Power BJTs . Power MOSFETs -
Bipolar Transistors (IGBTs) - Basic Structure and VI Characteristics. Static, dynamic and
characteristics. Protection, cooling and mounting techniques. Series and Parallel operation of
Triggering and basics of driver circuits. Different types of commutation schemes: Natural and
MODULE-II (10 HOURS)
1-Phase Half & Full Wave Controlled Rectifier with various kinds of loads (R, R-L-E
Midpoint and Bridge type converters. Half Controlled and Fully Controlled Bridge circuits,
waveforms, Input Line Current Harmonics, Power factor, current distortion and displacement
Inverter Mode of Operation. Continuous and discontinuous modes, Effect of source
assuming constant load current. Effect of freewheeling diode. Three phase bridge converters
different types of load with constant load current, different waveforms. 180 and 120 degree
MODULE-III (10 HOURS)
DC-DC Converters: Classification of types of choppers, One, Two and Four quadrant
Step up and down choppers, Analysis of Type-A chopper, Single-and two quadrant operation
AC-AC Converters: Single-phase mid-point and bridge types of step-up and step-down
Single phase AC Voltage regulators and its basic analysis.
MODULE-IV (10 HOURS)
Single-phase Half and Full bridge Inverter, Pulse Width Modulated (PWM) technique for
control, SPWM Technique 1-phase inverters, Auxiliary Commutated (Mc-Murray) and
Complementary Commutated (Mc-Murray Bedford) Inverters, Three-phase Voltage Source
type of Inverters. (120 and 180 Degree conduction modes), Current Source Inverter.
Applications: UPS, SMPS, Induction Heating, Electronic Ballast, AC/DC drives speed