The book "Description of existing dynamo machines and electric motors of constant and alternating currents and rotating transformers" is a fascinating and informative publication created by a team of authors that immerses the reader in the world of electrical engineering and mechanical engineering. This work will become an indispensable assistant for students, engineers, teachers and anyone interested in modern technologies and their application in various industries. The book examines in detail the main types of dynamo and electric motors, as well as rotating transformers, which play a key role in ensuring the operation of a variety of devices and systems, from household appliances to industrial plants. The authors seek not only to explain the principle of operation of these machines, but also to analyze their design features, advantages and disadvantages, as well as the scope of application. The reader will be able to learn about how DC and AC motors work, what technologies are used to manufacture them, and how they have evolved over time. The book will be of interest not only to specialists in the field of electrical engineering, but also to those who want to understand more deeply how the devices that surround us in everyday life function. Students of technical universities will find in this edition useful materials for preparing for classes and exams, and practicing engineers will be able to update their knowledge about modern trends and innovations in the field of electric motors and dynamos. The topics raised in the book cover a wide range of issues, such as the efficiency of electric motors, their impact on energy conservation and sustainable development, as well as innovative technologies that can change the approach to the design and operation of electric machines. The authors emphasize the importance of choosing the right type of engine for a specific task, which makes the book especially relevant in the context of rapid technology development and the need to optimize production processes. The style of presentation in the book is characterized by accessibility and clarity, which allows even those who do not have deep knowledge in the field of electrical engineering to easily absorb material. The team of authors includes experienced specialists who share their knowledge and practical experience, which makes the text lively and rich. The reader will not only gain theoretical knowledge, but will also be able to see how this knowledge is applied in practice. If you are looking for literature that will help you understand the intricacies of the work of dynamos and electric motors, then this publication will be your reliable guide. It will also be useful for those interested in topics related to automation, robotics and modern technologies in the field of energy. The book can be a great addition to your library if you want to be up to date with the latest advances in electrical and mechanical engineering. Do not miss the opportunity to immerse yourself in the world of dynamo machines and electric motors, opening up new horizons of knowledge and opportunities. “Description of existing dynamos and DC and AC electric motors and rotating transformers” is not just a book, but a whole world waiting to be explored.