this book is intended to be a text book on "electromechanical energy conversion" for the undergraduates of electrical and electronic engineering students of universities and colleges. therefore the level and amount of the knowledge to be transferred to the reader is kept as much as what can be transferred in one academic semester of a university or college. although the subject is rather classical and somehow well established in some respects it is vast and can be difficult to grasp if went in to details. in this book it is aimed to be as short, lean and as easily understandable as possible with minimum of wording and maximum of drawings, figures and tables. a course on "electromechanical energy conversion" is a necessity in all universities and colleges entitled to grant a licence for electrical engineering. this book is aimed at meeting the requirements of this essential subject of electrical engineering by providing information just as much as it is necessary to complete the course. a compact chapter is included with figures and tables on energy and the restraints on its production brougth about by the climate change of the planet. a new approach has been tried for some of the old subjects like magnetic circuits and electrical machines together with todays much used motors.