MATHEMATICAL MODEL OF THE CONVERTER WITH FOUR ZONES BY REGULATION OF THE OUTPUT VOLTAGE AND ELECTRIC MECHANICAL LOAD

2018 ◽  
Vol 27 (103) ◽  
pp. 17-23
Author(s):  
V.V. Mykhailenko, ◽  
◽  
Y.M. Chunyak, ◽  
O.S. Tcharniak
Keyword(s):  
Mathematical Model ◽  
Output Voltage ◽  
Mechanical Load

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.

Rotation of Two-Temperature Generalized Thermoelastic Half-Space Subjected to Thermal Shock and Without Energy Dissipation

2017 ◽  
Vol 14 (1) ◽  
pp. 529-535
Author(s):  
Eman A. N Al-Lehaibi
Keyword(s):  
Mathematical Model ◽  
Energy Dissipation ◽  
Mechanical Load ◽  
Generalized Thermoelasticity ◽  
Laplace Transforms ◽  
Temperature Parameter ◽  
Without Energy Dissipation ◽  
The Impact ◽  
The Mathematical Model ◽  
Two Temperature

In this work, a mathematical model for the thermoelastic medium with constant elastic parameters in the context of two-temperature generalized thermoelasticity without energy dissipation has been constructed. The governing equations of the mathematical model will be taken when the medium is quiescent first. Laplace transforms techniques will be used to get the general solution for any set of boundary conditions. The solution will be obtained for a particular model when the medium is subjected to a thermal load by using stat-space approach. The inversion of the Laplace transforms will be calculated numerically and after that we’ll present the results graphically with some comparisons to study the impact of thermal or mechanical load on the speed of progress of mechanical and thermal waves through the medium. Also, to studying the effect of the two-temperature parameter rotation parameter on all the studied field.

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.

Research on the Voltage Sensitivity of Differential Cymbal Piezoelectric Vibration Acceleration Sensor

2014 ◽  
Vol 705 ◽  
pp. 208-213
Author(s):  
Hui Gao ◽  
Deng Hua Li ◽  
Bi Zheng Dong
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Output Voltage ◽  
Structural Features ◽  
Order System ◽  
Voltage Sensitivity ◽  
Acceleration Sensor ◽  
Vibration Acceleration ◽  
Cymbal Transducer ◽  
Piezoelectric Vibration

To improve the sensor's output voltage sensitivity, two cymbals piezoelectric transducer are employed as the sensitive elements to form a differential cymbal piezoelectric vibration acceleration sensor. The structural features of the sensor are analyzed, second-order system mathematical model is established and the output voltage sensitivity of the sensor is also studied. The experimental results show that output voltage sensitivity of differential cymbals piezoelectric vibration acceleration sensor is two times of that of the sensor with single cymbal transducer. The experimental data agrees well with the theoretical analysis result.

Steady‐state modeling of a phase‐shift PWM parallel resonant converter

2006 ◽  
Vol 25 (4) ◽  
pp. 883-899
Author(s):  
İres İskender ◽  
Yıldürüm Üçtug˘ ◽  
H. Bülent Ertan
Keyword(s):  
Mathematical Model ◽  
Steady State ◽  
Phase Shift ◽  
Analytical Model ◽  
Output Voltage ◽  
Resonant Converters ◽  
Resonant Converter ◽  
Content Type ◽  
Phase Shift Angle ◽  
Shift Angle

PurposeTo derive an analytical model for a dc‐ac‐dc parallel resonant converter operating in lagging power factor mode based on the steady‐state operation conditions and considering the effects of a high‐frequency transformer.Design/methodology/approachA range of published works relevant to dc‐ac‐dc converters and their control methods based on pulse‐width‐modulation technique are evaluated and their limitations in output measurement of higher output voltage converters are indicated. The circuit diagram of the converter is described and the general mathematical model of the system is obtained by deriving and combining the mathematical models of the different converter blocks existing in the system. The derived mathematical model is used to study the steady‐state and transient performance of the converter. The deriving procedure of the analytical model for a parallel resonant converter is extensively given and the analytical model obtained is verified by simulation results achieved using MATLAB/SIMULINK and the program written by the authors.FindingsThe paper suggests an analytical model for dc‐ac‐dc parallel resonant converters. The model can be used in the output voltage estimation of a converter in terms of its phase‐shift angle and the dc‐link voltage.Research limitations/implicationsThe resources in the library of the authors' university and also the English resources relative to dc‐ac‐dc converters reachable through the internet were researched.Practical implicationsThe analytical model suggested can be used in estimating the output voltage of the converters used in high‐voltage applications or where there are difficulties in employing sensors in measurement of the output voltage due to high price or implementation problems.Originality/valueThe originality of the paper is to present an analytical model for dc‐ac‐dc parallel resonant converters. Using this model makes it possible to estimate the output voltage of the converter using the dc‐link voltage and the phase‐shift angle. The proposed model provides researchers to regulate the output voltage of the converters using feed‐forward control technique.

Analysis of Changes in Temperature and Irradiance to DC-DC Buck Converter Based on IP Controller for Solar Power Plant Application

2015 ◽  
Vol 785 ◽  
pp. 127-130
Author(s):  
Slamet ◽  
Rasli bin Abd Ghani ◽  
Fuminori Kobayashi
Keyword(s):  
Mathematical Model ◽  
Power Plant ◽  
Input Signal ◽  
Output Voltage ◽  
Solar Power ◽  
Buck Converter ◽  
Solar Power Plant ◽  
Temperature Changes ◽  
C Programming ◽  
Simulation Results

This paper presents a mathematical model of photovoltaic with buck converter to analyze the voltage and current as a result of radiation and temperature changes as the input signal. Photovoltaic simulator models created using the C programming integrated with Matlab Simulink. The IP controller is used to control the current of a buck converter with the reference current from the dynamic model of photovoltaic. The control signal from the IP controller is used for generating a PWM signal, which is used to drive the IGBT gate of the buck converter. Input of irradiance and temperature are given to the photovoltaic simulator. Moreover, the current and voltage of the buck converter are used as a feedback to the photovoltaic simulator. This experiment is run through the system in real time and the simulation results show that changing in radiation has more significant effect on the output voltage of a solar power system compared to changing in temperature.

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.

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