scholarly journals SIMULATION OF THE SINGLE-PHASE TWO-LEVEL AUTONOMOUS VOLTAGE INVERTER WITH FREQUENCY-PULSE MODULATION

2020 ◽  
Author(s):  
М.П. Дунаев ◽  
С.У. Довудов
Keyword(s):  
Single Phase ◽  
Pulse Modulation ◽  
Voltage Inverter ◽  
Autonomous Voltage Inverter ◽  
Frequency Pulse

Научная статья посвящается моделированию однофазного двухуровневого инвертора напряжения (АИН) с частотно-импульсной модуляцией (ЧИМ). Модель реализована в среде MATLAB R2019a с использованием блоков из библиотеки Simulink/Simscape. Описаны основные элементы библиотеки Simscape. Разработана и смоделирована схема АИН с ЧИМ с использованием блоков из библиотеки Simscape. Полученные диаграммы АИН с ЧИМ показали, что частота в середине периода ЧИМ в 3 раза больше относительно краев. Также получены диаграммы тока и напряжения на активной и активно-индуктивной нагрузке АИН.

scholarly journals SIMULATION OF A SINGLE-PHASE TWO- LEVEL AUTONOMOUS VOLTAGE INVERTER WITH THE PULSE WIDTH MODULATION

2020 ◽  
Vol 2020 (1) ◽  
pp. 197-198
Author(s):  
Mihail Dunaev ◽  
Sarfaroz Dovudov
Keyword(s):  
Pulse Width ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Operating Conditions ◽  
Measuring Instruments ◽  
Static Characteristics ◽  
Voltage Inverter ◽  
Autonomous Voltage Inverter ◽  
Generation Unit

The work is devoted to modeling the circuit of a single-phase two-level the autonomous inverter of the voltage with pulse-width modulation in the MATLAB environment. Pulse-width modulation generation unit developed. Static characteristics of the converter are obtained. With the help of a set of measuring instruments, the efficiency of the сonverter is measured under nominal operating conditions.

scholarly journals THE STABILIZATION ACCURACY OF THE PHASE POSITION OF THE WORKING BODY OF THE ROBOTICS COMPLEX

2020 ◽  
pp. 20-28
Author(s):  
А. Denisov ◽  
Y. Denisov ◽  
O. Bursala
Keyword(s):  
Control System ◽  
Electric Drive ◽  
Pid Controller ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Optimal Operation ◽  
Voltage Inverter ◽  
Operation Speed ◽  
The Moment ◽  
Autonomous Voltage Inverter

To stabilize the phase position of the working body of the robotics complex a single-circuit precision electric drive system was developed based on the principle of phase-locked loop. The direct-driven electric drive is made on the basis of brushless direct current motor, which is switched to synchronous mode with minimal discrepancy between the phases of the reference signals and the pulse speed sensor. The phase error signal is fed to the input of the PID controller, which controls the pulse width modulation of the impulses controlling the operation of the power transistors of the autonomous voltage inverter. In a static mode, the control system of the autonomous voltage inverter implements a sinusoidal law of the pulse width modulation of the output pulses. The PID controller and the control system of the autonomous voltage inverter are programmatically implemented on the basis of the controller. In the process of analysing of the stabilization accuracy, the synchronous motor is represented by a second-order linear link, which establishes a relation between the phase deviations of the motor rotor and the stator magnetic field. The autonomous voltage inverter is represented by a zero-order hold whose coefficient of amplification on amplitude is found by the results of the approximation of its output voltage using the Walsh-Fourier series. The analysis of the phase stabilization process is performed on the basis of the state variables method taking into account the perturbations at the moment of load using the program which implements the recurrent procedure. The settings of the PID controller are determined by the variation results when the moment of load changes. Their initial values ​​are determined as a result of optimizing the system in terms of operation speed considering the condition of finite duration processes. It is assumed that there is no moment of load perturbation. The procedure for setting the PID controller parameters to the optimal operation speed mode can also be performed on the basis of neural networks. As a result of the calculations, it was found that with an increase of the load moment by 5%, the maximum deviation of the rotor phase was 0.22 us and 0.03 us of minimum deviation respectively.

Linear Control for Full Bridge Phase PWM Rectifier

2016 ◽  
Vol 823 ◽  
pp. 453-458
Author(s):  
Mauricio Mauledoux ◽  
Nicolás Linares Ospina ◽  
Angie Julieth Valencia Castañeda ◽  
Oscar Aviles Sanchez
Keyword(s):  
Single Phase ◽  
Control Strategies ◽  
Linear Control ◽  
Resistive Load ◽  
Pwm Rectifier ◽  
Pulse Modulation ◽  
Control Techniques ◽  
Sinusoidal Current ◽  
Industry And Commerce ◽  
Width Pulse Modulation

Rectifiers are widely use in areas of industry and commerce to implement equipment which require to be powered by alternating current (AC) source, so that uncontrolled rectification requires an operational requirement study because they only properly works if the rectifier calculated boundary conditions are ideal and invariant. Therefore the implementation of control strategies should be take into account to generate the desired signal performance in the rectifier. This document shows the implementation of different control techniques on the behavior the sinusoidal current in a single-phase rectifier width modulated pulse and resistive load. Consequently, in this work the development of several control strategies are presented, for behavior analysis of signals in a rectifier with width pulse modulation and resistive load. Additionally, a comparison between the developed controllers is performed in order to get the best behavior available for this applications.

scholarly journals Analysis of a Dry-type Reactor Fault Based on COMSOL Thermal Field Simulation and High Frequency Pulse Oscillations

2018 ◽  
Vol 173 ◽  
pp. 02027
Author(s):  
LUO Xin ◽  
WANG Shuai-yi ◽  
WANG Yao ◽  
GU Yu
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
Thermal Field ◽  
Short Circuit ◽  
High Frequency Oscillation ◽  
Reactor Operation ◽  
Type Reactor ◽  
Field Simulation ◽  
Turn Insulation ◽  
Frequency Pulse

For a single-phase earth fault of 35 kV dry-type reactor, the 5th package area is found with serious turn-to-turn short circuit after it conducts the DC resistance test, turn-to-turn insulation test of high frequency oscillation pulse and rework disassembly. The turn-to-turn short circuit of resistance will lead to wire fusing, which makes the conventional pre-test projects have limitations. With COMSOL finite element thermal field simulation of the fault 35kV dry-type reactor, the temperature distribution result of the reactor indicates that the hottest point is at the 6th package during the reactor operation and the temperature rises 73.75K. In addition, the temperature rises of the 5th, 7th, 14th, 15th package is also higher than other packages, which easily causes device failure due to insulation deterioration. Through the analysis and thermal field simulation of the test for failed reactor, it can provide the reference basis for equipment design, manufacture, daily repair and maintenance.

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