All electrical technology works by transforming one kind of energy into the next. Transformers, electric motors, as well as power generators are the 3 main types of such machinery. The generator converts into mechanical energy from electrical energy, the motors transfers electric current into mechanical power, and also the transformers adjusts the voltage levels in the alternating current system. Powering our homes, businesses, and factories, electrical machines are indispensable. Studying electromagnetic circuits, transformers, engines, as well as generators is essential for mechanical as well as electronics engineering majors. Numerous practical examples, pictures, and over a thousand self-evaluation activities are included in the book. This book is highly recommended for use in electronics and communications engineering programs at the university level. This book covers topics like Power System, Basics of electric power, Energy Sources, Introduction to DC Machines, Different Types of Excitation, Starting and Speed Control of DC Motors, Introduction to Transformer, Voltage Regulation, Auto – Transformers, Instrument Transformers, Rotating Magnetic Field and Three-Phase Induction Motor, Equivalent Circuit and Circle Diagram of Induction Motor, Generation of EMF, Synchronous Impedance and Voltage Regulation, Single – Phase Motors, Three – Phase Synchronous Machines, Three – Phase Induction Machines and many more.