hamari acadmi: Power Electronics

Power Electronics:A First Course

by Ned Mohan

This textbook focuses on Power Electronic Systems as one of the topics in an integrated Electric Energy Systems curriculum consisting of Power Electronics, Power Systems and Electric Machines and Drives.This textbook follows a top-down systems-level approach to Power Electronics to highlight inter relationships between these sub-fields within this curriculum, and is intended to cover both the fundamentals and practical design in a single-semester course.This textbook follows a building-block approach to power electronics that allows an in-dept h discussion of several important topics that are left out in a conventional course, for example, designing feed back control, power-factor-correction circuits, soft-switching, and Space-Vector PWM, which is a PWM technique, far superior to Sine-PWM, to name a few. Topics in this book are carefully sequenced to maintain continuity and student interest throughout the course. In a fast-paced course with proper student background, this book can be covered from front-to-back in one semester . However, the material is arranged in such a way that an instructor, to accommodate the students’ background, can either omit an entire topic or cover it quickly to provide just an overview using the accompanying slides , without interrupting the flow.

As discussed in the introductory chapter of this textbook ,power electronics is an enabling technology for powering information technology and making factory automation feasible.In addition, power electronics has a crucial role to play in providing sustainable electric energy. Most scientists now believe that carbon-based fuels for energy production contribute to climate change which is a serious threat facing our civilization. In the United States, the Department of Energy reports that approximately 40% of all the energy consumed is first converted into electricity. Potentially, use of electric and plugin hybrid cars, high speed rails, and so on may increase this to even 60%. Therefore, it is essential that we generate electricity from renewable sources such as wind and solar, which at present represent only slightly over 4%, build the next-generation smarter and robust grid to utilize renewable resources often in remote locations, and use electricity in more energy-efficient ways. Undoubtedly, using electricity efficiently and generating it from renewable sources are the twin pillars of sustainability, and as described in this textbook ,power electronic systems are a key to them both!

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Power Electronics