Electrical Machines, Drives and Power Systems 6th Edition by Theodore Wildi describes theoretical, practical, multidisciplinary approach to provide introductory users with a broad understanding of modern electric power. The scope of the book reflects the rapid changes that have occurred in power technology over the past few years–allowing the entrance of power electronics into every facet of industrial drives, and expanding the field to open more career opportunities.
The author covers the fundamentals of electricity, magnetism and circuits, mechanics and heat, electrical machines and transformers, electrical and electronic drives, and electric utility power systems. This book is aimed for managers of electrical utilities, electricians, electrical contractors and electrical maintenance personnel.
This comprehensive and coherent coverage of electrical machines, drives, and power systems serves as an on-the-job reference guide for electrical engineers. It explores revolutionary converter technology affecting every sector of industrial and commercial activity—modifying electric elevators, locomotives, and transit vehicles; servomechanisms; heating, ventilating and air conditioning systems; fans; compressors; and innumerable industrial production lines.
Chapter topics include generators, motors, efficiency and heating of electrical machines, three-phase circuits, transformers, transmission and distribution, and the cost of electricity. Every sector of industrial and commercial activity is therefore being affected by this revolutionary converter technology. Electric elevators, electric locomotives, electric transit vehicles, servomechanisms, heating, ventilating and air conditioning systems, fans, compressors, and innumerable industrial production lines are being modified to utilize this new technology.
The change is also affecting the transmission and distribution of electric power—an industry that has been relatively stable for over 50 years. Here, we are seeing large rotating machines, such as synchronous condensers and frequency changers, being replaced by solid-state converters that have no moving parts at all.
Important development work, carried out by the Electric Power Research Institute (EPRI) in Palo Alto, California, in collaboration with several electrical manufacturers, has also resulted in the creation of high-power static switches, thyristor-controlled series capacitors, and converters that can fill the role of phase-shift transformers.
These new methods of power flow control, known by the acronym FACTS (Flexible AC Transmission Systems) will permit existing transmission and distribution lines to carry more power to meet the ever-increasing demand for electricity. On account of their extremely fast response, the converters can also stabilize a network that may suddenly be menaced by an unexpected disturbance.
It is remarkable that these innovations all rest on a common base. In other words, the converter technology used in electric motor drives is similar to that employed to control the flow of power in electric utilities. As a result, everything falls neatly and coherently into place. The teaching and learning of electric machines, drives, and power systems are thereby made much easier.
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