The proposed book contains the results of work carried out in recent years to create new and improve previously created collector and brushless traction engines of promising freight, passenger and universal electric locomotives of direct and alternating current. The book complements the information provided in previous editions devoted to traction engines. The book is intended for scientific and engineering workers of research institutes and design bureaus of industry and transport, as well as for teachers, students and graduate students of universities and colleges of the corresponding profile.