The book “Automatic regulation of the excitation of medium-power synchronous motors for the constancy of cos 1” is a fascinating and in-depth study devoted to one of the key topics in the field of electrical engineering and automation. The authors gathered in this collective work offer readers a unique perspective on the problems and solutions associated with regulating the excitation of synchronous motors, making this work an indispensable source of knowledge for students, engineers and energy professionals. At first glance, the topic may seem highly specialized, but in fact it touches on important aspects related to the efficiency and reliability of electric machines, which play a central role in modern industrial processes. The authors consider in detail the methods of automatic regulation, allowing to maintain a constant value of the power factor (cos 1), which is critical for optimizing the operation of synchronous motors and reducing energy losses. The book will be especially interesting for those who study electrical engineering, automation and energy. Students of technical universities, graduate students, as well as practicing engineers will find in it many useful ideas and solutions that can be applied in real projects. Readers interested in modern technologies and innovations in the field of electric drive control will also receive a lot of information that will help them better understand how synchronous motors work and what methods of regulating them exist. The topics raised in the book cover a wide range of issues: from the theoretical foundations of synchronous motors to the practical aspects of their automatic regulation. The authors pay attention to both mathematical models and algorithms that allow effective control of excitation processes. This makes the book a useful tool not only for theorists, but also for practitioners who seek to introduce new technologies into their work. The style of writing of the authors is clear and accessible, which allows even complex technical concepts to be explained in simple and understandable language. This makes the book attractive to a wide audience, including those just starting out in the field of electrical engineering. In addition, the text contains practical examples and illustrations that help to better assimilate the material and see its application in real conditions. The book "Automatic regulation of the excitation of medium-power synchronous motors for the constancy of cos 1" will be an important addition to the library of any specialist in the field of energy. It not only expands the horizons of knowledge, but also inspires new ideas and approaches to solving problems in the field of automation. If you are looking for literature that will help you understand the operation of synchronous motors and their regulation, this book will be an excellent choice. It can become the basis for further study of topics related to automation, energy saving and improving the efficiency of industrial processes. Do not miss the opportunity to get acquainted with this unique work, which will certainly become a reference book for many specialists in the field of electrical engineering.