There no any doubt that, the science of electric machinery is one of the necessary important sciences for the undergraduate students in electrical engineering and in mechanical engineering as well. This book "Transformers & Electric Machinery Principles" covers transformers and essential electric machines. The simplicity to a great extent in explaining each subject and the concentration on the different enough Examples are the features that have been adopted in developing the text material. Moreover, at the end of each Chapter there are tutorial problems and different review answered questions for revision. Thus, this book has been written to meet the introductory phase of the needs of those students and engineers who are interested in electrical machinery science and its applications. The book text material divides itself into nine Chapters and three Appendices. The essential goal from this book is offering simple and concentrated scientific material about transformers and essential electrical rotating machines equipped with enough applied examples, tutorial problems and different review answered questions for revision for those who are interesting in electric machines.

Prof. Dr. Fathe Allythi has received his PhD degree in Electrical Engineering from Al-Azhar University, Egypt, 1991G.Since then he worked in the teaching field. Since 2008 to present, he is a Prof. Dr. of Electrical Machinesand related Courses at Taif University, Saudi Arabia.He has many publications. Most his searches are in wind energy.