The new seventh edition of Electric Machinery has been extensively updated while retaining the emphasis on fundamental principles and physical understanding that has been the outstanding feature of this classic book. This book covers fundamental concepts in detail as well as advanced topics for readers who wish to cover the material in more depth. The presentation of all material in the book has been carefully reviewed and revised/and/or expanded as needed for clarity. One such example is the expanded treatment of permanent-magnet ac machines in Chapter 5. Similarly, the dc machine presentation in Chapter 7 has been reorganized for added clarity. This edition has also been expanded with additional examples and practice problems. The use of MATLAB has been considerably expanded in the new edition, in examples, in practice problems and in the end-of-chapter problems.