scholarly journals Rectifier Drive with Boost Regulator Connected to Frequency Converter DC link Based on Self-Commutated Voltage Inverter with Relay Regulation for Submersible Oil Pumps

2020 ◽  
Vol 20 (2) ◽  
pp. 110-119
Keyword(s):  
Frequency Converter ◽  
Voltage Inverter ◽  
Boost Regulator

scholarly journals A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

2021 ◽  
Vol 1 (8 (109)) ◽  
pp. 6-16
Author(s):  
Volodymyr Nerubatskyi ◽  
Oleksandr Plakhtii ◽  
Denys Hordiienko ◽  
Serhii Mykhalkiv ◽  
Vasyl Ravluyk
Keyword(s):  
Power Generation ◽  
Output Voltage ◽  
Modulation Frequency ◽  
Frequency Converter ◽  
Harmonic Distortion ◽  
Voltage Inverter ◽  
Starting Current ◽  
Lc Filter ◽  
Power Generation Systems ◽  
Filter Capacitor

An analysis of the method for ensuring the sinusoidality of the output voltage in power generation systems with self-commutated voltage inverters under the requirements of the international standard IEEE-519 is presented. In a number of programs, especially low-power generation systems, a low-cost solution is needed to provide the sinusoidal waveform of the output voltage with the total harmonic distortion of 5 %. This solution is to use two-level voltage inverters with an output sine LC filter. However, the feature of the sine filter with the frequency converter is that the PWM frequency affects the spectrum of higher harmonics of the output voltage. In addition, there is the starting current of the filter capacitor, which can disable the power switches of the voltage inverter. The developed method for calculating the values of the LC filter with the two-level voltage inverter in the PWM mode is presented meeting the requirements of the international standard IEEE-519, taking into account the modulation frequency and limitation of the starting current of the filter capacitor. To confirm the required quality of the output voltage of the two-level voltage inverter with the sine filter, an appropriate simulation model was created in the Matlab/Simulink computer simulation environment. The oscillograms and harmonic analysis of the input and output voltages of the sine filter, which showed the total harmonic distortion of 1.88 %, are presented. A physical prototype of the investigated system was created on the basis of a 5.5 kW OVEN PChV203-5K5-V frequency converter (Ukraine). Using the SIGLENT SDS1104X-E oscilloscope (China), the real waveform and the results of the harmonic analysis of the sine filter output voltage, confirming the implementation of the necessary sinusoidality criteria, were obtained

scholarly journals Stop ModeSimulation for an Asynchronized Vent Motor Fed by a Voltage Inverter

2020 ◽  
Vol 20 (3) ◽  
pp. 132-136
Keyword(s):  
Mathematical Modeling ◽  
Electric Drive ◽  
Frequency Control ◽  
Frequency Converter ◽  
Excitation Frequency ◽  
Control Unit ◽  
Current Phase ◽  
Automatic Frequency ◽  
Voltage Inverter ◽  
Drive Control

The paper presents the results of mathematical modeling of a sensorless electric drive control system operation. This system is based on a dependent voltage inverter with current phase control and phase-locked loop frequency control and feeds an asynchronous valve motor in the stop mode. The article presents the developed model of this electric drive in the MATLAB mathematical modeling system. The model features an excitation frequency converter, that maintains a nominal rotor current and a constant excitation frequency of 15 Hz. From the stator (armature) side, the frequency converter is synchronized in phase with the current using an automatic frequency control unit and sets the phase angle between the current and the armature voltage. The paper presents a basic system of equations that describes the modes of operation of an asynchronized valve motor, as well as the expression of the electromagnetic moment in the stop mode. It shows the electromagnetic torque on the motor shaft, which was obtained as a result of mathematical modeling of the thrust mode of an asyn­chronized valve motor at rated currents, the rotor frequency of 15 Hz, with 20 electrical degrees phase shift between the current and the armature voltage.

FREQUENCY CONVERTER WITH THE REDUCED THD OF THE OUTPUT VOLTAGE

2016 ◽  
Vol 2016 (5) ◽  
pp. 14-16 ◽  
Author(s):  
G.V. Pavlov ◽  
◽  
I.L. Vinnichenko ◽  
A.V. Obrubov ◽  
◽  
...  
Keyword(s):  
Output Voltage ◽  
Frequency Converter

Steady-state modelling method for matrix-reactance frequency converter with boost topology

2011 ◽  
Vol 60 (2) ◽  
pp. 137-148
Author(s):  
Igor Korotyeyev ◽  
Beata Zięba
Keyword(s):  
Fourier Series ◽  
Steady State ◽  
Differential Equations ◽  
Numerical Method ◽  
Frequency Converter ◽  
Double Fourier Series ◽  
Galerkin’S Method ◽  
Galerkin's Method ◽  
Modelling Method ◽  
Three Phase

Steady-state modelling method for matrix-reactance frequency converter with boost topologyThis paper presents a method intended for calculation of steady-state processes in AC/AC three-phase converters that are described by nonstationary periodical differential equations. The method is based on the extension of nonstationary differential equations and the use of Galerkin's method. The results of calculations are presented in the form of a double Fourier series. As an example, a three-phase matrix-reactance frequency converter (MRFC) with boost topology is considered and the results of computation are compared with a numerical method.

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