This book is intended to be a textbook for undergraduate students studying electrical and electronic engineering in universities and colleges. Therefore, the level and amount of the knowledge to be transferred to the reader is kept to as much as what can be taught in one academic semester of a university or a college course. Although the subject is rather classical and somehow well established in some respects, it is vast and can be difficult to grasp if unnecessary details are not avoided. This book is aimed to give the reader just what is necessary - with plenty of short and easily understandable examples and drawings, figures, and tables. A course on electromechanical energy conversion is a necessity in all universities and colleges entitled to grant a license for electrical engineering. This book is aimed at meeting the requirements of this essential subject by providing necessary information to complete the course.A compact chapter is included with figures and tables on energy and the restraints on its production brought about by global climate change. A new approach has been tried for some of the classic subjects including magnetic circuits and electrical machines together with today’s much-used motors.