Progress of Semiconductor Discharge-Pulse Systems for Processing Granular Conductive Media

Abstract

An analysis of the evolution of semiconductor discharge-pulse systems for processing granular conductive media is given. The main types of thyristor generators of discharge pulses, the features of their operation, advantages and disadvantages are described. The methods of increasing the stability of parameters and reducing the duration of the discharge pulses of thyristor generators are analyzed. The ways of increasing the specific fraction of nanodispersed and submicron erosion particles obtained using thyristor discharge-pulse systems are shown. The development of transistor discharge pulse generators is described and their advantages and disadvantages are given. Algorithms for controlling transistor pulse generators, which make it possible to reduce their instability and a circuit of such generator are given. The ways of increasing the technical and economic indicators of transistor pulse generators are shown. Refe rences 36, figures 2.

Method of dynamic parameters for mathematical modelling of switching processes of valves closing of semiconductor converters

“…One of the research and practical directions of development of Electrical Engineering, called «Electronics», allowed to develop a number of electronic semiconductor devices, based on which a long list of various valve frequency converters (VFCs), which serve as switches for regulated electric drives based on electric [1], alternators [2], autonomous power supply systems [3] and even in multi-winding transformers for simultaneous connection of its secondary windings in the power supply circuit [4]. VFCs are also used in electrical equipment of many other types, for example, in discharge-pulse systems of special technological processes, in particular, the treatment of granular conductive media [5] and so on. The use of VFC as part of electrical equipment has made it possible to fundamentally increase its functionality.…”