"Detailing the fundamental principles that govern electric machines and drives systems, this book describes the laws of induction and interaction and demonstrates their fundamental roles with numerous practical examples. This book combines the traditional areas of electric machinery with the latest in modern control and power electronics. An electrical machine is a device which converts mechanical energy into electrical energy or vice versa. Electrical machines also include transformers, which do not actually make conversion between mechanical and electrical form but they convert AC current from one voltage level to another voltage level."