EE 443.3 Lecture Schedule
Week 
Contents 
1 
Transient and steady state voltages and currents in resistive, inductive, RL and RC circuits, voltage and currents in an inductive load circuit with a freewheeling diode, halfwave rectifier (diode) circuit with a resistive load, average and rms output voltage and current, halfwave diode rectifier circuit with a RC load circuit 
2 
Halfwave diode rectifier circuit with a RL load; average and rms output voltage and current, conduction angle; numerical example on output voltage and current calculations in a halfwave diode rectifier circuit with a RL load, halfwave rectifier circuit with a RL load and a freewheeling diode, evaluation of output voltage and current in a halfwave rectifier circuit with a RL load and a freewheeling diode 
3 
Power semiconductor switches, diodes, thyristors, BJTs, MOSFETs and GTOs, reverse recovery time, turnoff time, losses in semiconductor switches, halfwave thyristor rectifier circuit with resistive, RL and inductive load circuits, effect of delaying thyristor gate current, time dependent expression for output current, evaluation of the conduction angle from the current expression, average and rms values of output voltage and current 
4 
Numerical example on output voltage and current in a thyristor controlled halfwave rectifier circuit with a RL load, thyristor controlled halfwave rectifier circuit with RL load and EMF source, commutation, line commutation, load commutation and forced commutation, Singlephase fullwave rectifiers; transformer between the source and the converter, singlephase fullwave controlled rectifiers 
5 
continuous current and discontinuous current in singlephase rectifiers, average output voltage and output current, harmonic analysis of the output with Fourier transform, average and rms current ratings of thyristors (transistors) in a singlephase fullwave rectifier circuit, numerical example of a singlephase fullwave rectifier 
6 
transfer (commutation) of current from one thyristor to another in a singlephase rectifier, numerical example of a single phase fullwave rectifier; uncontrolled threephase halfwave rectifiers, output voltage and current; controlled Threephase half wave rectifiers, average and rms output voltage and currents; threephase fullwave rectifiers, controlled and uncontrolled, average and rms output voltage and currents, input line current of a threephase fullwave rectifier, harmonics in the output, average and rms thyristor currents 
7 
numerical example of a threephase fullwave rectifier, effect of ac side inductance on the performance of a threephase fullwave rectifier; dc motor drive with a separately excited field, steadystate model of a separately excited dc motor, relationship of armature circuit variables, dual converters, regenerative breaking 
8 
block diagram of a closedloop position/speed dc servo drive, constant torque and constant power operation, DC to DC converter, choppers, type B chopper with regeneration, analysis of a type A chopper, 
9 
Load current of a Type A chopper, conditions for continuous and discontinuous load current, output voltage under continuous and discontinuous load currents of a chopper, numerical examples on output current, voltage and peak current of a chopper, Fourier analysis of the output voltage of a chopper 
10 
Analysis of a boost chopper, output current of a boost chopper, conditions for discontinuous current in a boost chopper, output voltage and the maximum and the minimum currents through the main switch and the diode in the boost chopper, numerical example 
11 
DC to AC converters, application of dc to ac converters, output voltage and current of a Singlephase half bridge inverter, harmonic contents at the output of an inverter, current through the switches and the antiparallel diodes in a halfbridge inverter, fullbridge inverter, 3phase inverters, 
12 
Voltage control in inverters, multiple pulsedwidth modulation, sinusoidal pulsedwidth modulation; reduction of harmonics from the output voltage of an inverter, pulsedwidth modulation technique of harmonic reduction 
13 
Snubber Circuits,
turnon, turnoff and overvoltage snubber circuits, di/dt and dv/dt protection of
thyristors.
