In the section concerning the actuator, machines with a constant winding radius are considered, as they have received preferential distribution in the USSR. Along with the kinematics and dynamics of hoisting with ordinary cages, considerable attention is paid to hoisting with tipping vessels and skips with bottom unloading. It is necessary to note that when considering various hoisting modes, in some cases, instead of the corresponding references, some formulas are repeated, which serve to determine the forces and powers in similar conditions, while maintaining, however, the identity of the numbering of the said formulas. Such a system of presentation allows for more convenient calculations for the corresponding hoisting modes, without having to search for the necessary expressions in different places in the book. A special section of the book is devoted to the consideration of the kinematics and dynamics of lowerinh with three-period tachograms carried out during operation by ordinary cages. With regard to the drive and control of the hoisting machine, a study was made of the physics of the processes occurring in various hoisting modes, both simple and the most complex, based on the coordination of the kinematics and dynamics of hoisting with the mechanical characteristics of the hoisting motors of both systems, i.e. asynchronous and in the Leonard drive. The calculation side, illustrated with numerical examples, relates to the definition of elements of the kinematics and dynamics of hoisting, energy consumption for hoisting, efficiency of hoisting units, starting rotor resistances of asynchronous hoisting motors and acceleration relay settings during automation of the starting period, the power of the hoisting motors, as well as the power of individual machines that make up the converter unit in the Leonard system. In conclusion, it should be noted that the issues considered in the proposed work, which is the result of many years of research by the author in the field of electric mine hoisting, are presented mainly in his own original interpretation. F. Shklyarskii June 1943
