The objective of the book is to provide a clear explanation of the mode of operation of the different electronic power devices in circuits and systems that are in wide use today in modern industry for the control and conversion of electric power. The book strives to fulfil this need for a fundamental treatment that allows students to understand all aspects of circuit functions through its neatly-drawn illustrations and wave diagrams. Several colour diagrams are included to explain difficult circuits and waveforms. This approach will help students in assimilating the operation of power electronics circuits much more thoroughly. This Second Edition includes a new chapter on Programmable Logic Controller (PLC). As in the First Edition the book begins with a discussion on rectifiers, differential amplifiers, operational amplifiers, multivibrators, timers and goes on to provide indepth coverage of power devices and power electronics circuits such as silicon controlled rectifiers (SCRs), inverters, dual converters, choppers, and cyclo-converters and their applications in the control of ac/dc motors, and heating and welding processes. The book also presents an overview of the modern developments in the field of optoelectronics and fibre optics. The book has an added advantage of multiple-choice questions, true/false statements, review questions and numerical problems at the end of each chapter, designed to reinforce the student s understanding of the concepts and mathematical derivations introduced in the text. This tailor-made book with its exhaustive explanations of circuit operations and its student-friendly approach should prove to be a boon to the students and teachers alike.

Contents
1. Power Supplies
2. Differential Amplifiers
3. Operational Amplifiers
4. Multivibrators, Switching Transistors, and Timers
5. Thyristors
6. Inverters, Dual Converters, Choppers and Cycloconverters
7. Motor Control
8. Heating and Welding Control
9. Optoelectronics and Optical Fibre
10. AC Power Conditioner
11. Programmable Logic Controller (PLC)