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

2015 ◽  
Vol 0 (2(56)) ◽  
pp. 129-135
Author(s):  
V. V. Mikhailenko ◽  
S. A. Аbdulaiev ◽  
V. V. Ernst ◽  
V. V. Chupak
Keyword(s):  
Mathematical Model ◽  
Output Voltage ◽  
Semiconductor Converter ◽  
Electromechanical Load

scholarly journals Research of processes in a converter with four-zone voltage regulation and electromechanical load

2021 ◽  
pp. 39-41
Author(s):  
Vladyslav Mykhailenko ◽  
Vadym Svyatnenko ◽  
Yuliya Chunyak ◽  
Vladyslav Bachynskiy
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Output Voltage ◽  
Electric Circuit ◽  
Electric Circuits ◽  
Semiconductor Converter ◽  
Semiconductor Converters ◽  
Electromagnetic Processes ◽  
Three Phase ◽  
The Mathematical Model

The new mathematical models of the electromagnetic processes is designed in three-phase electric circuit of the semiconductor converters with many-server zoned regulation phases voltages disregarding losses in semiconductor commutator for quick estimation of the influence parameter loads on level and form of the output voltage. mathematical model of the semiconductor converter is also used for study of the connecting processes in semiconductor converter with actively-inductive load. Will develop the method multivariable function, what fall into algorithmic equations of the analysis formed and connecting processes in furcated electric circuit with semiconductor commutator and reactive element, toward account of the particularities of the use phase and linear voltages to network of the power supply. Analysis of the electromagnetic processes is organized beside this article in electric circuit with semiconductor commutator. Mathematical model is created for analysis electro-magnetic processes in semiconductor converter with width pulsed regulation of the output voltage. The broughted graphs, which reflect the electromagnetic processes in electric circuit. Method much parametric functions was used when performing calculation. The mathematical model of the converter is created for eleven zoned regulations of the output voltage. Article is devoted to the development of a method of multi-parametric modulating functions by means of working out of new mathematical models and definition of functions and the algorithmic equations for the analysis on sub-system components of electromagnetic processes in electric circuits of variable structure with sinusoidal, direct and pulsing voltage. Introduction of functions with discrete parameters in the algorithmic equations for analysis of processes in circuits with semiconductor commutators simplifies modeling on subsystem components. The mathematical model of steady-state processes and transients in electric circuits of semiconductor converters of modulation type with multi-channel zonal use of phase and line voltages of a three-phase network of power supplies is developed. The mathematical model of electric circuits of thyristor shapers of electro-discharge pulses for the analysis and the matching of capacitors charging modes with decrease several times of electric resistance of technological load is also created.

scholarly journals MATHEMATICAL ALGORITHM OF FUZZY LOGIC CONTROLLER FOR MULTILEVEL INVERTER CREATING VERTICAL DIVIDED VOLTAGE

2019 ◽  
Vol 59 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Erol Can
Keyword(s):  
Mathematical Model ◽  
Fuzzy Logic ◽  
Fuzzy Logic Control ◽  
Pid Controller ◽  
Output Voltage ◽  
Fuzzy Logic Controller ◽  
Boost Converter ◽  
Multilevel Inverter ◽  
Logic Control ◽  
Multi Level

A 9-level inverter with a boost converter has been controlled with a fuzzy logic controller and a PID controller for regulating output voltage applications on resistive (R) and inductive (L), capacitance (C). The mathematical model of this system is created according to the fuzzy logic controlling new high multilevel inverter with a boost converter. The DC-DC boost converter and the multi-level inverter are designed and explained, when creating a mathematical model after a linear pulse width modulation (LPWM), it is preferred to operate the boost multi-level inverter. The fuzzy logic control and the PID control are used to manage the LPWM that allows the switches to operate. The fuzzy logic algorithm is presented by giving necessary mathematical equations that have second-degree differential equations for the fuzzy logic controller. After that, the fuzzy logic controller is set up in the 9-level inverter. The proposed model runs on different membership positions of the triangles at the fuzzy logic controller after testing the PID controller. After the output voltage of the converter, the output voltage of the inverter and the output current of the inverter are observed at the MATLAB SIMULINK, the obtained results are analysed and compared. The results show the demanded performance of the inverter and approve the contribution of the fuzzy logic control on multi-level inverter circuits.

RESEARCH ON THE ELECTRIC MAGNETIC PROCESSES IN SEMICONDUCTOR CONVERTER WITH TWENTY FOURTH ZONED REGULATION OF THE OUTPUT VOLTAGE

2017 ◽  
pp. 171-176
Author(s):  
Vladyslav Мihaylenko ◽  
◽  
Oleg Petruchenko ◽  
Ruslan Rokytskiy ◽  
Julia Jazenok ◽  
...  
Keyword(s):  
Output Voltage ◽  
Semiconductor Converter

scholarly journals Development of a relay-vector control system for a multi-phase semiconductor converter of electric energy

2021 ◽  
pp. 5-15
Author(s):  
S. V. Panteleev ◽  
A. N. Malashin
Keyword(s):  
Mathematical Model ◽  
Vector Control ◽  
Electrical Energy ◽  
Control Action ◽  
Spatial Harmonic ◽  
Semiconductor Converter ◽  
Semiconductor Switch ◽  
Harmonic Components ◽  
Optimal Control Action ◽  
Vector Control System

A system of relay-vector control of current in the circuit of a polyphase electric machine has been developed. For this, on the basis of the analysis of electromagnetic processes in a multiphase semiconductor converter of electrical energy, its discrete mathematical model was created, which takes into account the redistribution of electromagnetic energy by individual spatial harmonic components, depending on the number of phases. Using this mathematical model, a method for relay control of spatial harmonic components of the input current of the converter in the “tube” has been developed. The formation of polyharmonic currents in each of the phases, conjugated in shape and phase with the voltage supplying the converter at each control period, is carried out by means of the optimal voltage vector of the semiconductor switch. To select the optimal control action, the objective function of the minimum deviation of the projections of the base voltage vectors of the semiconductor switch for the j-th combination of the state of the keys from the calculated control action determined by the mathematical model is used. An objective function of this type allows one to take into account different values of the amplitudes of the base voltage vectors of the semiconductor switch in the transformed orthogonal coordinate systems. In this case, there is no need to predict changes in the instantaneous values of the input current for one or two periods ahead, which is ensured by a decrease in the number of iterations to determine the optimal control action. To check the developed provisions, a simulation model of a nine-phase semiconductor converter of electrical energy with a relay vector control system was created. The results of the study of the model confirmed the adequacy of the developed technical solutions, the use of which will ensure the most complete realization of the own advantages of a multiphase electric machine in order to generally improve the weight, size and energy indicators of the autonomous power supply system.

scholarly journals Numerical Analysis of Switching Processes in Class D Modulators

2021 ◽  
Vol 7 (1) ◽  
pp. 71-80
Author(s):  
V. Nikolaev ◽  
E. Rylov ◽  
D. Devyatkin ◽  
R. Nikolaev
Keyword(s):  
Mathematical Model ◽  
Optimal Control ◽  
Numerical Analysis ◽  
Output Voltage ◽  
Accurate Determination ◽  
Power Losses ◽  
Active Devices ◽  
Current Pulses ◽  
Class D

The article investigates the switching processes in class D modulators for optimal control of active devices (transistors, triodes, tetrodes, etc.) in real conditions, to reduce power losses in them and non-linear distortions of the modulator output voltage, as well as more accurate determination of the devices efficiency. The presented mathematical model takes into account the inertia of the switching processes, the duration of the rise and fall fronts of voltage and current pulses, as well as losses in switching elements.

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