Faran A. Way of Improving Operational Characteristics of AC Electronic Motors of Medium and High Capacity

Object of research: thyratron motors of medium and high capacity with improved performance characteristics. Subject of research: parameters, operating modes, circuit and design solutions of thyratron mo-tors of medium and high capacity which take considerable effect on their performance indicators. Research methods: Theoretical studies were based on numerical solution of time differential equations through explicit meth-ods, on using the equivalent circuits and methods of solving the chain prob-lems, on function approximation techniques and on elements of process similarity theory. Research novelty of obtained results. Basing on a single mathematical model and completed set of comparative studies of electro-magnetic and electromechanical processes in different types of thyratron motors of medium and high capacity, there are determined ways of their rational choosing and improving their operating properties and performance characteristics. Unified mathematical models and calculation algorithms, sufficiently fully describing the processes in constituent elements in the thyratron motor system taking into account connection between them to study operating modes of thyratron motors of different design solutions on a single ground. Basing on analysis of stationary and transitional modes of thyratron motors operation there were defined theoretical approaches to choosing rational parameters, operating modes, circuit and design solutions of machines of medium and high capacity. There is carried out systematiza-tion of supplementary losses of power in thyratron motors, which are the most considerable and specific when a synchronous machine is supplied with electricity from a thyristor converter, and improved techniques of calculating these losses considering analysis of harmonic constituents of magnetizing force. Extent of implementation. The results were implemented at Open Joint-Stock Company ELECTROMACHINE (Kharkiv) as confirmed by the statement of implementation. Scope of usage. Electric machine-building.