MATHEMATICAL MODEL OF SEMICONDUCTOR CONVERTER WITH FIVE-ZONE REGULATION OF THE OUTPUT VOLTAGE AND ELECTROMECHANICAL LOAD

Abstract

Purpose. This work is directed on study of the electromagnetic processes in electric circuits with semiconductor commutators. It is necessary to develop the new mathematical models of functions determination and algorithmic equations for analysis of formed and transition processes in electric circuits of the variable structure. To research the mathematical models with semiconductor commutators and sections, in which sine, constant and pulsed voltages appear. Methodology. The mathematical model of the semiconductor converter with electromechanical load was created for achievement the purpose in view. It is shown that appearance of nonlinear element complicates powerfully the problems of the calculation and studies appearing in circuits of the electromagnetic processes. The most complications appear in circuits of the variable structure, in which sine, constant and pulsed current arise under the action of appropriete voltages. Findings. The new mathematical models of the electromagnetic processes were designed in three-phase electric circuit of the semiconductor converters with multiserver zoned regulation of phase voltages (without losses in semiconductor commutators) for quick estimation the load parameters influence on level and form of the output voltage. Originality. The method of multi-parameter functions was developed. The last are included in algorithmic equations for analysis of formed and transition processes in network with semiconductor commutators and reactive elements, in the considerations direction of phase to neutral voltages usage in the power circuit. It is motivated that use of the multi-parameter modulating functions method in electric circuit of variable structures is expedient if in their sections there are not more than three independent reactive elements. The new mathematical model of formed and transition processes in electric circuits of the semiconductor converters, modulation type with multiserver zoned use of phase to neutral voltages in three-phase network of the power supply was developed. At that energy loss in commutators were not taken into account. Such mathematical model was created for quick estimation the influence of parameters load on controlled features of sine and constant voltages. Practical value. New scheme technical solutions of semiconductor commutators with high-frequency impulse relative time regulation of output voltage when change parameters load in a wide range were created. It has allowed raising the speed of the electro technological systems. The increase in speed methods of regulation and determinations the energy efficient mode parameters of semiconductor commutators of the electro technological systems were developed. The new methods of analyzes of formed and transition processes in electric circuits of semiconductor converters, modulation type with constant output voltages and with miscellaneous types of modulating influence.