This work employs a theoretical, practical, multidisciplinary approach to provide introductory students with a broad understanding of modern electric power. The scope of the book, now in its third edition, has been expanded to reflect the rapid changes that have occurred in power technology during the past five years. It includes new or expanded coverage of switching converters; the basic theory of pulse width modulation; PWM drives; discussion of the principle of vector control; the dramatic changes in electric utility transmission and distribution systems in an entirely new chapter; and the solution of AC and DC circuits. It also adds industry application problems to the standard exercise set at the end of each chapter, and Chapter 2 now contains a new section on how to solve electric circuits.