Video Lecture Series from IIT Professors :
Pulse width Modulation for Power Electronic Converters by Dr. G. Narayanan sir
Dr. G. Narayanan sir
Associate ProfessorRoom No: 234 First Floor
Power Electronics Group Department of Electrical Engineering Indian Institute of Science, Bangalore
2000  Ph.D.  Indian Institute of Science, Bangalore 
1994  M.Tech.  Indian Institute of Technology, Kharagpur 
1992  B.E.  College of Engineering, Guindy, Anna University, Chennai 
Converter topologies for AC/DC and DC/AC power conversion, overview
of applications of voltage source converters; pulsewidth modulation
techniques for 1phase and 3phase bridge converters, sinetriangle
PWM, bus clamping PWM, space vector based PWM, advanced PWM techniques;
calculation of switching and conduction losses; compensation for dead
time and DC voltage regulation; estimation of current ripple and torque
ripple in inverter fed drives; overmodulation; extension of modulation
methods to multilevel inverters.

Detailed syllabus:

Power electronic converters for dcac and acdc power conversion (6 lectures).
Electronic switches, dcdc buck and boost converters, Hbridge, multilevel converters – diode clamp, flying capacitor and cascadedcell converters; voltage source and current source converters; evolution of topologies for dcac power conversion from dcdc converters.

Applications of voltage source converters (2 lectures).
Overview of applications of voltage source converter, motor drives, active frontend converters, reactive compensators, active power filters

Purpose of pulsewidth modulation (2 lectures).
Review of Fourier series, fundamental and harmonic voltages; machine model for harmonic voltages; undesirable effects of harmonic voltages – line current distortion, increased losses, pulsating torque in motor drives; control of fundamental voltage; mitigation of harmonics and their adverse effects

Pulsewidth modulation (PWM) at low switching frequency (3 lectures).
Square wave operation of voltage source inverter, PWM with a few switching angles per quarter cycle, equal voltage contours, selective harmonic elimination, THD optimized PWM, offline PWM

Trianglecomparison based PWM (4 lectures).
Average pole voltages, sinusoidal modulation, third harmonic injection, continuous PWM, busclamping or discontinuous PWM

Space vector based PWM (4 lectures).
Space vector concept and transformation, perphase methods from a space vector perspective, space vector based modulation, conventional space vector PWM, busclamping PWM, advanced PWM, trianglecomparison approach versus space vector approach to PWM

Analysis of line current ripple (4 lectures).
Synchronously revolving reference frame; error between reference voltage and applied voltage, integral of voltage error; evaluation of line current ripple; hybrid PWM for reduced line current ripple

Analysis of dc link current (2 lectures).
Relation between lineside currents and dc link current; dc link current and inverter state; rms dc current ripple over a carrier cycle; rms current rating of dc capacitors

Analysis of torque ripple (2 lectures).
Evaluation of harmonic torques and rms torque ripple, hybrid PWM for reduced torque ripple

Inverter loss (3 lectures).
Simplifying assumptions in evaluation of inverter loss, dependence of inverter loss on line power factor, influence of PWM techniques on switching loss, design of PWM for low inverter loss.

Effect of inverter deadtime effect (2 lectures).
Requirement of deadtime, effect of deadtime on line voltages, dependence on power factor and modulation method, compensation of deadtime effect.

Overmodulation (3 lectures).
Perphase and space vector approaches to overmodulation, average voltages in a synchronously revolving dq reference frame, lowfrequency harmonic distortion

PWM for multilevel inverter (3 lectures).
Extensions of sinetriangle PWM to multilevel inverters, voltage space vectors, space vector based PWM, analysis of line current ripple and torque ripple
Lecture schedule – Pulsewidth Modulation for Power Electronic Converters
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