Abstract
The article focuses on electromagnetic processes in the electric circuits withsemiconductor switches. The mathematical model of the converter with twelve-zone regulation of output voltage has been developed to analyse electromagnetic processes in semiconductor converters with pulse-width regulation. The graphs representing electromagnetic processes in electric circuits are given. The mathematical model of the semiconductor converter is also used to research transients in semiconductor converters with active inductive load. The method of multiparameter functions, which are the parts of algorithmic equations of the analysis of steady-state and transient processes inbranchy electric circuits with semiconductor switches and reactive elements, has been developed in terms of considering the features of using phase and linear voltages of the power supply network. The authors have created a new mathematical model of steadystate and transient processes in electric circuits of modulating semiconductor converters with multichannel zonal usage of phase voltages in three-phase power supply without taking into account electric power losses in switches to evaluate rapidly the influence of load parameters on the characteristics of regulated sinusoidal and DC voltages. The results of this work can be used to improve the method of multiparameter modulatingfunctions to simplify the analysis of transient processes in electric circuits without taking into account the losses in key elements. Ref. 4, pic. 3
Highlights
Present-day research in the field of electrical engineering allows using in conversion units a high-frequency link with a significantly greater rate of switching valves than the frequency of AC voltage in commercial power systems [1,2,3,4]
This paper focuses on the structure of frequency converters for electromechanical complexes with pulse-width regulation of DC voltage when twelve-zone control is carried out
It is worth mentioning that the widespread use of semiconductor converters in electric circuits of modern converters of electricity parameters considerably complicates the problem of analysing electromagnetic processes
Summary
Present-day research in the field of electrical engineering allows using in conversion units a high-frequency link with a significantly greater rate of switching valves than the frequency of AC voltage in commercial power systems [1,2,3,4]. This paper focuses on the structure of frequency converters for electromechanical complexes with pulse-width regulation of DC voltage when twelve-zone control is carried out. It is worth mentioning that the widespread use of semiconductor converters in electric circuits of modern converters of electricity parameters considerably complicates the problem of analysing electromagnetic processes. The greatest complications arise when it is necessary to simulate the steady-state and transient processes in branchy circuits of the variable structure, where in the sections with reactive elements there are sinusoidal, pulsed and DC voltages. We analyse the use of the structure of semiconductor converters as a high frequency link concerning the design and analysis of converters for electromechanical complexes with pulse-width regulation of DC voltage when twelve-zone control is performed. The aim of the study is to create a mathematical model of semiconductor converters with electromechanical load of output voltage
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