The book provides information about the design and principle of operation of three-phase and single-phase asynchronous motors, about calculating the characteristics and choosing the power of motors when powered from a three-phase and single-phase network, about calculating parameters and choosing starting and operating capacitors, about control and protection circuits and selection of circuit elements. Technical data is presented on some types of modern asynchronous motors, capacitors, electrical control and protection devices. Information is provided on the development of the latest types of asynchronous energy-saving motors. The book is intended for a wide range of readers.