This book provides a theoretical discussion of pulse width modulation (PWM) in power electronic inverters. Pulse width modulation is widely used for the frequency control of speed of ac motors, the design of uninterruptible power supplies (UPS) as well as the integration of renewable energy sources into existing power grid systems. PWM technique is based on approximation of sinusoidal waveforms by sequences (trains) of rectangular pulses whose widths are properly modulated. This width-modulation results in the suppression of low order harmonics at the expense of amplification of high order harmonics which are suppressed by energy-storage elements in load circuits. The discussion covers various PWM techniques with a focus on the optimal time-domain PWM techniques proposed by the authors.

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Isaak D Mayergoyz is Alford L Ward Professor of the Department of Electrical and Computer Engineering at the University of Maryland, College Park. He received his master and PhD degrees in the former Soviet Union, where he was a senior research scientist at the Institute of Cybernetics of the Ukrainian Academy of Sciences before emigrating to the US in 1980. His areas of research have included plasmon resonances in nanoparticles, nonlinear magnetization dynamics induced by spin polarized current, fluctuations in nanoscale semiconductor devices, stochastic analysis of systems with hysteresis, drive independent recovery and forensics of hard disk data, computational electromagnetics and power engineering.

Siddharth Tyagi is a PhD candidate in the department of Electrical and Computer Engineering at the University of Maryland, College Park. He will graduate with a PhD in May 2021. He graduated from the Indian Institute of Technology, Kharagpur with Bachelor of Technology degree in Electrical Engineering and Master of Technology degree in Machine Drives and Power Electronics in 2016. His research interests are in power electronics converters and their control, magnetism and spintronics. One of his publications on pulse width modulation in the journal AIP Advances was selected as Editor's Pick for its noteworthy contribution and featured on the front page of the journal.

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