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Tytuł:
Extended T-type inverter
Autorzy:
Rąbkowski, J.
Kopacz, R.
Powiązania:
https://bibliotekanauki.pl/articles/1193496.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
multilevel inverter
T-type inverter
boost converter
silicon carbide
Opis:
This paper presents a new concept for a power electronic converter – the extended T-type (eT) inverter, which is a combination of a three-phase inverter and a three-level direct current (dc)/dc converter. The novel converter shows better performance than a comparable system composed of two converters: a T-type inverter and a boost converter. At first, the three-level dc/dc converter is able to boost the input voltage but also affects the neutral point potential. The operation principles of the eT inverter are explained and a simulation study of the SiC-based 6 kVA system is presented in this paper. Presented results show a serious reduction of the DC-link capacitors and the input inductor. Furthermore, suitable SiC power semiconductor devices are selected and power losses are estimated using Saber software in reference to a comparative T-type inverter. According to the simulations, the 50 kHz/6 kVA inverter feed from the low voltage (250 V) shows <2.5% of power losses in the suggested SiC metal oxide–semiconductor field-effect transistors (MOSFETs) and Schottky diodes. Finally, a 6 kVA laboratory model was designed, built and tested. Conducted measurements show that despite low capacitance (2 × 30 μF/450 V), the neutral point potential is balanced, and the observed efficiency of the inverter is around 96%.
Źródło:
Power Electronics and Drives; 2018, 3, 38; 55-64
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-phase soft-switching inverter with coupled inductors, experimental results
Autorzy:
Karyś, S.
Powiązania:
https://bibliotekanauki.pl/articles/200045.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
soft-switching
resonant inverter
ZVS inverter
Opis:
This paper presents experimental results of the three-phase soft-switching inverter with coupled inductors that verify the control method influence on efficiency improvement. Different kinds of control methods were tested on the 6 kW experimental inverter. A short discussion on a few design methods of the resonant tank elements was made. Experimental results confirm that the advanced control algorithm and the proposed new design method of the resonant tank elements significantly increase the efficiency of this resonant inverter.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 535-540
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency control of inverter fed induction motor drives
Autorzy:
Shaban, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/376136.pdf
Data publikacji:
2012
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
induction motor
torque-speed characteristic
inverter
Opis:
Induction motor losses at partial loads can be significantly reduced by operating an adjustable frequency drive at the optimum slip which yields maximum efficiency. The present investigation quantifies the potential improvement in induction motor efficiency for both standard and energy efficient motors operating on a six-step voltage-source inverter supply. The analysis employs a comprehensive model of the induction motor which incorporates the frequency - dependent nature of the motor parameters and effects of stray load loss. Efficiency contours are plotted on a torque- speed plane for constant volts/hertz operation and for optimum slip frequency control plotted as a contour map.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2012, 72; 291-295
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Z-source converter in photovoltaic grid-connected transformer-less inverter
Autorzy:
Farhangi, B.
Farhangi, S.
Powiązania:
https://bibliotekanauki.pl/articles/262715.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
photovoltaic power conditioner (PV PCU)
gird-connected systems
Z-source inverter
inverter
Opis:
In PV grid connected power conditioners, usually both stepping-up the PV array voltage, and stepping-down the dc bus voltage for injection of a sinusoidal current to the grid is required. In this paper the design procedure of Z-source converter as a single phase PV grid connected transformer-less inverter is presented. The converter has one switch less than the conventional two stage power conditioner, which leads to reduction of cost. An optimum modulation pattern for the switches is proposed, and the low frequency ripple of the converter is modeled. The design of the converter is verified by simulation.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 2; 41-45
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiphase Z-source inverter using maximum constant boost control
Autorzy:
Kouzou, A.
Abu-Rub, H.
Powiązania:
https://bibliotekanauki.pl/articles/229291.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Z-source inverter
multiphase inverter
five phase machine
shoot-through
boost factor
duty cycle
Opis:
This paper deals with the impedance source (Z-source) multiphase inverter, where the maximum constant boost control method is studied and analyzed in the general case of number of phases. On the other side the impact of the modulation index and the number of phases on the duty cycle shoot-through and on the gain of the output voltage ranges is presented. To validate advantages of the Z-source multiphase inverter, the proposed topology and the maximum constant boost control are implemented in simulation and in real time experimentation with Z-source five phase inverter. The output voltage is applied to two parallel loads, a five phase resistive load and a five phase induction machine.
Źródło:
Archives of Control Sciences; 2013, 23, 1; 107-126
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified Topology and Modulation Technique for Z-Source Neutral-Point Clamped Inverter
Autorzy:
Akbari, Ehsan
Zishan, Farhad
Powiązania:
https://bibliotekanauki.pl/articles/2175930.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
modulation
optimization
multilevel inverter
MZS-NPC
Opis:
The impedance network makes it possible to increase and decrease the voltage, which is not available in normal inverters (voltage and current sources).This paper presents a modified topology and modulation technique for a three-phase Modified Z-Source Neutral-Point Clamped (MZS-NPC) inverter. A modulation scheme for the proposed topology is designed based on maximum gain control method to achieve the maximum voltage gain by simple implementation and balancing the neutral point voltage of the dc link. In order to supply the desired voltage to the critical load in an islanded micro-grid, a closed-loop ac voltage controller is realized in fuel cell or photovoltaic applications based on the proposed inverter. The ability to reinforce and validity of topology operations and modulation techniques has been demonstrated by simulation. It should be noted that the simulations are implemented in MATLAB / Simulink software.
Źródło:
Power Electronics and Drives; 2022, 7, 42; 210--226
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adjusting output impedance using a PI controller to improve the stability of a single-phase inverter under weak grid
Autorzy:
Jiao, J.
Nelms, R. M.
Powiązania:
https://bibliotekanauki.pl/articles/136224.pdf
Data publikacji:
2016
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
grid impedance
inverter output impedance
LC filter
PI controller
single-phase inverter
Opis:
Explored in this paper is the grid impedance effect on the stability of a single-phase grid connected inverter with an LC filter based on an analysis of the inverter output impedance. For a single-phase grid connected inverter, a PI controller is often used to regulate the current injected into the grid. However, the control performance can be influenced when the inverter is connected to a weak grid. Also, the utility grid has background harmonic noise, which can make the injected current distorted. Therefore, analysis of the output impedance of a single-phase grid connected inverter is important for the robustness and stability of the system. By modeling the output impedance of inverter, it can be determined that the proportional gain and integral gain of the controller have an effect on the output impedance. Analytical results show that by adjusting the PI controller parameters, the ability for harmonic reduction and stability of the system can be improved. Simulation and experiments using a 1 kW single-phase grid connected inverter verify the effectiveness of the theoretical analysis.
Źródło:
Transactions on Environment and Electrical Engineering; 2016, 1, 4; 50-57
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of space vector modulation strategy on hybrid (Si-SiC) inverter losses
Autorzy:
Bonisławski, M.
Hołub, M.
Powiązania:
https://bibliotekanauki.pl/articles/140592.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
przekształtnik hybrydowy
elektronika energetyczna
urządzenie z szeroką przerwą energetyczną
SVPWM
DPWM
power electronic inverter
SiC diodes
hybrid inverter
wide band gap devices
Opis:
This work summarizes efficiency measurement results of a full bridge, 3 phase inverter composed of state-of-the-art Si IGBT transistors and Si or SiC diodes. Different (symmetrical and discontinuous) space vector modulation strategies were chosen in order to examine their influence (together with modulation frequency) on inverter losses. Induction machine was used as load, different load points were examined. Results clearly show, that proper modulation strategy, minimizing the switching losses of semiconductor switches, can increase the overall output efficiency at about 1% in case of both silicon and hybrid constructions. The drawback of DPWM approach is connected with the decreased quality of inverter output current. Hybrid technology can also improve the output efficiency at about 1% when compared to traditional constructions, but only in case of elevated switching frequencies. At low frequencies (below 10 kHz) modern semiconductor offer comparable results at much lower device costs.
Źródło:
Archives of Electrical Engineering; 2012, 61, 1; 69-75
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental results of parallel connected inverters feeding medium voltage transformer
Autorzy:
Kozak, M.
Powiązania:
https://bibliotekanauki.pl/articles/377860.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
electrical transformer
line side inverter
inrush currents
inverter parallel operation
Opis:
Development of medium voltage, high power ship electrical installations on board of special purpose vessels, has led to use of grid side inverters along with step-up grid transformers. In this paper there is presented theoretical background and experimental results of two inverters in parallel connection feeding one 0,4/15 kV transformer.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2017, 90; 359-368
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of operation of class E ZVS resonant inverter
Autorzy:
Szychta, E.
Powiązania:
https://bibliotekanauki.pl/articles/262645.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
class E ZVS resonant
inverter
output capacitance
MOSFET transistor
zero voltage switching
Opis:
The article discusses class E zero-voltage-switching resonant inverter (ZVS). The resonant circuit of the inverter is subject to mathematical analysis using the method of state variables with the aid of MATLAB software. Results of simulation testing, based on Simplorer software, of an inverter at the operating frequency of 100kHz are presented.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2005, 11, 1; 57-67
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modern Direct Torque and Flux Control methods of an induction machine supplied by three-level inverter
Autorzy:
Sikorski, A.
Kulikowski, K.
Korzeniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/201199.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
asynchronous machine
DC/AC inverter
DTC
flux and torque control
3-level DC/AC inverter
Opis:
This paper describes two modern direct torque and flux control methods of an induction machine supplied by a three-level inverter. Additionally, it presents a comparison of the methods both in static and dynamic states. The methods, in a specific way, make use of an increased number of active vectors of the three-level inverter in order to improve control quality and reduce switching frequency. The two methods modify the DTC method by using its advantages and eliminating, at the same time its drawbacks. In static states the comparison was based on the results of investigations performed for two different load values and three set values of angular speed, whereas in dynamic states the comparison was focused on the behavior of the machine at startup. The results of the investigations have shown that both methods give very good performance. They are characterized by both sinusoidal shape of flux and low current deformations even at low angular speeds i.e. less than 10% of the nominal value. The presented methods also allow to generate nominal flux for set zero angular speed in order to achieve excitation of the induction machine. The switching frequencies for both methods are very similar in almost the whole range of control but the methods have shown some differences in control quality, particularly for higher torque values.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 771-778
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Measurement and Analysis of Harmonics and Interharmonics in Output Waveforms of Frequency Inverter. Part II
Autorzy:
Bartman, J.
Powiązania:
https://bibliotekanauki.pl/articles/114230.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
interharmonics
inverter
power quality analyzer
measurements
Opis:
The paper discusses the measurement and analysis of the voltage and output power distortions of frequency inverter that supplies an induction motor. It covers basic information regarding frequency inverters and norms with definitions and descriptions of terms related to the measurement of harmonics and interharmonics. Moreover, it describes the problems that can occur while analyzing the signal when the inter-harmonics are present during the measurement. Exemplary results of measurements done with power quality analyzer in the laboratory have been presented.
Źródło:
Measurement Automation Monitoring; 2016, 62, 10; 325-328
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Measurement and Analysis of Harmonics and Interharmonics in Output Waveforms of Frequency Inverter. Part I
Autorzy:
Bartman, J.
Powiązania:
https://bibliotekanauki.pl/articles/114413.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
interharmonics
inverter
power quality analyzer
measurements
Opis:
The paper discusses the measurement and analysis of the voltage and output power distortions of frequency inverter that supplies an induction motor. It covers basic information regarding frequency inverters and norms with definitions and descriptions of terms related to the measurement of harmonics and interharmonics. Moreover, it describes the problems that can occur while analyzing the signal when the inter-harmonics are present during the measurement. Exemplary results of measurements done with power quality analyzer in the laboratory have been presented.
Źródło:
Measurement Automation Monitoring; 2016, 62, 10; 322-324
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fault Diagnosis of Sensors for T-type Three-Level Inverter-fed Dual Three-Phase Permanent Magnet Synchronous Motor Drives
Autorzy:
Wang, Xueqing
Wang, Zheng
Wang, Wei
Cheng, Ming
Powiązania:
https://bibliotekanauki.pl/articles/1193713.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fault diagnosis
sensor fault
T-type inverter
three-level inverter
dual
three-phase
PMSM
Opis:
To improve the reliability of motor system, this paper investigates the sensor fault diagnosis methods for T-type inverter-fed dual three-phase permanent magnet synchronous motor (PMSM) drives. Generally, a T-type three-level inverter-fed dual three-phase motor drive utilizes four phase-current sensors, two direct current (DC)-link voltage sensors and one speed sensor. A series of diagnostic methods have been comprehensively proposed for the three types of sensor faults. Both the sudden error change and gradual error change of sensor faults are considered. Firstly, the diagnosis of speed sensor fault was achieved by monitoring the error between the rotating speed of stator flux and the value from speed sensor. Secondly, the large high-frequency voltage ripple of voltage difference between the estimated voltage and the reference voltage was used to identify the voltage sensor faults, and the faulty voltage sensor was determined according to the deviation of voltage difference. Thirdly, the abnormal current amplitude on harmonic subspace was adopted to identify the current sensor faults, and the faulty current sensor was located by distinguishing the current trajectory on harmonic subspace. The experiments have been taken on a laboratory prototype to verify the effectiveness of the proposed fault diagnosis schemes.
Źródło:
Power Electronics and Drives; 2019, 4, 39; 165-176
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Initial Excitation Issues of Synchronous Generator with VSI Inverter in Varying Rotational Speed Operation
Autorzy:
Kozak, M.
Powiązania:
https://bibliotekanauki.pl/articles/2064987.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
synchronous generator
initial excitation
FOC control
voltage source inverter
synchronization
Opis:
Synchronous self-excited generators still are and probably will be the most popular 3-phase alternators installed in inland power stations so onboard of seagoing ships. Because of fuel savings and environmental restrictions Diesel, dual-fuel and gas propulsion engines for alternators of wide-range varying revolutions drives are increasingly used. There must be efficient way of creating 3-phase voltages of desired constant parameters ensured when generator produces variable amplitudes and frequencies of voltages because of changing rotational speed. As the control method modified field oriented control widely used with squirrel cage induction machines was chosen. This control method involves decoupling of currents and control voltages to flux and torque components and keeping them in optimal (orthogonal) condition. In order to obtain proper excitation and operation of such generator several factors have to be taken into account. Nonlinear dependence of voltage generated from rotational speed of self-excited synchronous generator is one of the factors that affects initial excitation process thus specific control method while generator startup. Theoretical background of synchronous generator excitation and voltage source inverter adopted FOC control method along with experimental results obtained in laboratory test bench of 5,5 kW generator and conclusions were presented.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 377--383
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method of reducing switching losses in three-level NPC inverter
Autorzy:
Beniak, R.
Rogowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1193262.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
reduction of switching losses
three-level NPC inverter
space vector modulation
Opis:
The aim of the paper is to present a concept of implementation of a space vector modulation (SVM) algorithm, which is used to create alternating current waveforms of changing amplitude and frequency in power inverters. The main goal of the method is to decrease the number of state changes in power transistors. It is realized by utilizing a prediction algorithm and sequences of transistors, which are not common in use. The method requires measurement of inverter output current flow. The prediction algorithm analyzes possible sequences of transistors’ states and choose those which offers smaller switch count. A decrease of about 20% was obtained for the cases tested. This paper presents simulation result for selected driving scenario. The described method decreases the number of state changes in power transistors and therefore it is a potentially good method to considerably decrease energy losses of multilevel inverter-powered drive.
Źródło:
Power Electronics and Drives; 2016, 1, 36/2; 55-63
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model trakcyjnego falownika napięciowego
The model of the voltage traction inverter
Autorzy:
Dominikowski, B.
Pacholski, K.
Woźniak, P.
Powiązania:
https://bibliotekanauki.pl/articles/312485.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
falownik napięciowy
SVPWM
sieć trakcyjna
voltage inverter
traction line
Opis:
W artykule przedstawiono model falownika napięciowego typu DC/AC wykorzystywany w zmodernizowanych elektrycznych zespołach trakcyjnych (EZT). W przekształtniku tym wykorzystano metodę sterowania typu SVPWM (ang. Space Vector Pulse Width Modulation), która pozwala w sposób dokładny odwzorować na jego zaciskach wyjściowych przebiegi napięcia sinusoidalnie zmiennego. Obwód tego typu pracujący w sieci trakcyjnej generuje tętnienia wartości wejściowego prądu o częstotliwości sześciokrotnie wyższej niż częstotliwość jego napięcia wyjściowego. Na wejściu DC obwodu pośredniczącego falownika w elektrycznej trakcji szynowej monitoruje się wartość prądu obciążenia sieci jezdnej m.in. do wyznaczenia pobieranej energii elektrycznej pobranej przez zespół trakcyjny.
In the paper presented the model of the voltage inverter type DC/AC used in modernized electrical traction. In this inverter, the SVPWM (Space Vector Pulse Width Modulation) control method was used which allow to the accurately imitate the voltage sinusoidal variable waveforms on its output connectors. The circuit of this type working in overhead contact line generates pulsations of input-current at a frequency six times higher than the frequency of its output voltage. At the DC input of the inverter circuit in the electric traction rail, the load current of the mains network is monitored. to determine the electricity consumed by the traction unit.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 12; 815-818, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multilevel inverter with optimal THD through the firefly algorithm
Autorzy:
El Mehdi Belkacem, R.
Benzid, R.
Bouguechal, N.
Powiązania:
https://bibliotekanauki.pl/articles/141495.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
firefly algorithm (FFA)
genetic algorithm (GA)
inverter
multilevel
optimized THD
Opis:
Reduction of the Total Harmonic Distortion (THD) in multilevel inverters requires resolution of complex nonlinear transcendental equations; in this paper we propose a combination of one of the best existing optimized hardware structures with the recent firefly algorithm, which was used to optimize the THD, through finding the best switching angles and guaranteeing the minimization of harmonics within a user defined bandwidth. The obtained THD through the simulation of the thirteen-level symmetric inverter has been reduced down to 5% (FFT of 60 harmonics). In order to validate the simulation results, a thirteen-level symmetric inverter prototype has been made, and practically experimented and tested with different loads. Consequently, the measured THD with resistive load was 4.7% on a bandwidth of 3 kHz. The main advantage of the achieved work is the reduction of the THD.
Źródło:
Archives of Electrical Engineering; 2017, 66, 1; 141-154
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical model of a single-phase inverter’s with voltage regulation
Autorzy:
Zaskalicky, P.
Zaskalicka, M.
Powiązania:
https://bibliotekanauki.pl/articles/2056350.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
model matematyczny
przekształtnik
regulacja napięcia
mathematical model
single-phase inverter
voltage regulation
Opis:
The paper deals with mathematical model of single-phase bridge inverters which outputs voltage is controlled by a pulse-width notching. The transistors in the inverter circuit are turned on and off so as to produce zero periods of equal length, for unipolar modulation, or negative voltage for bipolar modulation. The D.C. source is being a fixed level of voltage. Suppose the notching frequency to be constant for all frequency of the fundamental squarewaves and to be fixed on 500 Hz. The output inverter’s voltage is expressed by an analytical formula based on Fourier complex series. On the base of output voltage, the waveforms of the output currents are analytically calculated for different inverter’s loads.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2009, 83; 41-45
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Passive filter design for three-phase inverter interfacing in distributed generation
Autorzy:
Ahmed, K. H.
Finney, S. J.
Williams, B. W.
Powiązania:
https://bibliotekanauki.pl/articles/262578.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
DG
inverter
grid connected
filtering
damping
harmonics
Opis:
With the growing use of inverters in distributed generation, the problem of injected harmonics becomes critical. These harmonics require the connection of low pass filters between the inverter and the network. This paper presents a design method for the output LC filter in grid coupled applications in distributed generation systems. The design is according to the harmonics standards that determine the level of current harmonics injected into the grid network. Analytical expressions for the maximum inductor ripple current are derived. The filter capacitor design depends on the allowable level of switching components injected into the grid. Different passive filter damping techniques to suppress resonance affects are investigated and evaluated. Simulated results are included to verify the derived expressions.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2007, 13, 2; 49-58
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decomposition of EMI Noise into Common and Differential Modes in PWM Inverter Drive System
Autorzy:
Kempski, A.
Smoleński, R.
Powiązania:
https://bibliotekanauki.pl/articles/262576.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
electromagnetic compatibility
common mode
differential mode
PWM inverter drive system
Opis:
In this paper [20] an analytical approach to decomposition of total phase EMI noises through algebraic calculations and the Fourier transform has been presented. Separating conducted EMI noise into different, common and differential mode (CM and DM) HF current components is important for a proper spectral analysis and application of EMI mitigation techniques. The results of calculations have been compared to EMI currents measured on the motor side of the PWM drive system. The proposed approach can be useful in comparative analysis of the influence of inverter control algorithms on spectra of CM currents in a given drive system.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 1; 53-58
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przemiennik częstotliwości jako nieliniowy odbiornik energii
Frequency inverter as a non-linear energy loads
Autorzy:
BARTMAN, Jacek
SOBCZYŃSKI, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/455461.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Rzeszowski
Tematy:
nieliniowe odbiorniki energii przemiennik częstotliwości
non-linear energy loads
inverter
Opis:
Artykuł przedstawia zagadnienia związane z pracą nieliniowych odbiorników energii. Określa, jakie odbiorniki uznaje się za nieliniowe, a jakie za liniowe. Jako przykład odbiornika nieliniowego pokazany jest przemiennik częstotliwości pracujący w układzie napędowym z regulowaną prędkością obrotową. Pokazano odkształcenia napięcia i prądu wywołane pracą napędu.
The work presents the issues associated with the functioning of non-linear receivers of the energy. It determines, what receivers are being regarded non-linear and which too linear. As the example of the non-linear receiver a inverter working in the driving system with the adjusted rotation speed is shown. Showing voltage and current distortion caused by the drive.
Źródło:
Edukacja-Technika-Informatyka; 2016, 7, 4; 394-399
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An evaluation of the accuracy of inverter sync angle during the grids disturbances
Autorzy:
Jarzyna, Wojciech
Zieliński, Dariusz
Gopakumar, K.
Powiązania:
https://bibliotekanauki.pl/articles/221529.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inverter synchronization
synchronization angle
PLL
sync error
distributed grid
Opis:
The grid-tied inverter synchronizes with the network on the basis of the instantaneous voltage phase angle. This angle is computed by the so-called synchronization algorithms. During grid disturbances, it is estimated with a certain accuracy, which varies for different disturbances and depends on the choice of algorithm. The tests presented here determine how to make an optimal selection of the synchronization algorithm. The research methods used are modeling, simulation and analysis of the results obtained. One of the most important outcomes is the determination of the root-mean-square sync error and its dynamics denotation. The research conclusions should be of particular interest to designers of distributed energy systems with a large number of inverter energy sources.
Źródło:
Metrology and Measurement Systems; 2020, 27, 2; 355-371
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel in-phase disposition SPWM pulse allocation strategy for cascaded H-bridge inverter
Autorzy:
Zhang, Y.
Xiong, J.
Kong, L.
Wang, X.
Powiązania:
https://bibliotekanauki.pl/articles/141155.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
in-phase disposition SPWM
Inverter
CHB
THD
Opis:
A novel in-phase disposition (IPD) SPWM pulse allocation strategy applied to a cascaded H-bridge (CHB) converter is presented in this paper. The reason causing the power of the CHB converter imbalance is analyzed according to the traditional structure, the conception of power imbalance degree is introduced and the principle of the novel in-phase disposition SPWM allocation strategy is deduced in detail. The new pulse allocation scheme can ensure the power balance in 3/4 cycles through interchanging the PWM pulse sequence of the different CHB cell, meanwhile it makes the full advantage of the IPD control strategy, lower the total harmonic distortion (THD) of line voltage compared to a carrier phase shifted (CPS) control strategy, which is verified by theoretical derivation. A seven-level cascaded inverter composed by three H-bridge cells is taken as the example. The simulation and experiment is performed. The results indicate the validity of the analysis and verify the effectiveness of the proposed SPWM allocation strategy.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 361--375
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CHB inverter with DC-link capacitor balancing and total harmonic minimization
Autorzy:
Armi, F.
Manai, L.
Besbes, M.
Powiązania:
https://bibliotekanauki.pl/articles/141332.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CHB inverter
capacitor voltage balancing
switching angles
Newton Raphson
algorithm
SHE
THD
Opis:
A cascaded H-bridge (CHB) multilevel inverter generally requires several DC sources. An alternative option is to replace the separate DC source feeding an H-bridge cell with a capacitor, while maintaining the other H-bridge cell with a real DC voltage source. In this paper a 7-level cascaded H-bridge inverter with a single DC-source is presented. This paper focuses mainly to achieve effective capacitor voltage balancing and selective harmonic elimination (SHE) based on the Newton Raphson algorithm (N–R). It shows hope to reduce the voltage ripple of the capacitors, which leads to higher power conversion efficiency with equal power distribution, reduces the initial cost, and complexity hence it is apt for industrial applications. Simulation results support the proposed control technique.
Źródło:
Archives of Electrical Engineering; 2018, 67, 1; 81-93
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Torque ripple calculation of a permanent magnet synchronous motor supplied by a three phase inverter with PWM
Autorzy:
Zaskalicky, P.
Powiązania:
https://bibliotekanauki.pl/articles/1372789.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
silnik synchroniczny
magnes trwały
przekształtnik
synchronous motor
permanent magnet
inverter
Opis:
A steady-state analysis of a permanent magnet synchronous motor drive with a voltage-source inverter is presented. The torque-speed profile required of the drive is a constant torque region from zero to the base speed and a constant power region above base speed. A Fourier series approach is used to predict the line current waveform. Assuming the output inverter's voltage is controlled by a pulse-width notching. Suppose the notching frequency to be constant for all frequency of the fundamental squarewave and to be fixed on 500 Hz. The permanent magnet synchronous motor model is obtained from its analogy to the fixed-excited synchronous motor. From the induced voltage and line current waveforms the electromagnetic torque ripple waveform is calculated.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2010, 88; 81-86
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalne sterowanie falownika przy jego pracy na sieć systemu energetycznego
Optimal inverter controling during its operation for power grid
Autorzy:
Mazur, D.
Powiązania:
https://bibliotekanauki.pl/articles/1369606.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
optymalne sterowanie
system energetyczny
optimal inverter
power grid
Opis:
The inverter circuit is supposed to operate for grid with low internal impedance (for fixed grid). The goal of the presented circuit is to provide the given current of the main harmonic to the grid. The grid can contain higher harmonics of the voltage, which due to the low impedance of the grid lines spreads to the voltage of the inverter output. Therefore we need to calculate the first (main) harmonic of this voltage and find such inverter controlling, that the main harmonic of the current flowing to the grid from the considered circuit would be in the given angle position to it and at the given value. The second important goal of the circuit is, as far as possible, to eliminate the voltage higher harmonics at the circuit output getting there from the grid. Obviously eliminating the ripples from voltage higher harmonics of the receiver is limited by the capabilities of the examined inverter circuit.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2012, 2, 95; 25-30
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method of reducing switch count in three-level NPC inverter – analysis in steady states
Autorzy:
Beniak, R.
Rogowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1193464.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
reduction of switch count
three-level NPC inverter
space vector modulation
Opis:
The proof of a concept for a new method of modulation has been presented which reduce switch count in a three-level neutral point clamped (3L-NPC) inverter. The method is an implementation of space vector modulation (SVM) by means of a prediction algorithm and sequences of transistors, which are not common in use. Those sequences make active use of clamping diodes of the inverter. The prediction algorithm analyzes possible sequences of transistors’ states and choose those which offers smaller switch count. Measurements of steady states were taken on prototype 3L-NPC.
Źródło:
Power Electronics and Drives; 2017, 2, 37/2; 117-126
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Overview of Carrier-based Modulation Methods for Z-Source Inverter
Autorzy:
Roomi, Muhammad M.
Powiązania:
https://bibliotekanauki.pl/articles/1193846.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
AC/DC
power conversion
impedance source inverter
modulation methods
shoot through
phase opposition disposition
reference disposition
Opis:
Single-stage energy converters, in particular, the Z-Source Inverter (ZSI) or impedance source inverter, has gained significant attention in the recent years. ZSI ensures flexible energy conversions (dc–dc, dc–ac, ac–ac and ac–dc) because of its unique ability to boost the output voltage in typical renewable energy systems. The impedance network integrated between the energy source and the load contributes to the unique functionality of the ZSI. As substantial research has been conducted on the ZSI, this article provides a review on the operation of ZSI. The article initially examines the various topologies commonly adopted for the application of the ZSI. Subsequently, details of the various modulation methods that are commonly used to obtain the voltage boosting using ZSI are documented. Additionally, the phenomenon of neutral point formation, which is an important impediment to the adoption of multilevel ZSIs and the limitation of the modulation methods, is explained.
Źródło:
Power Electronics and Drives; 2019, 4, 39; 15-31
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and simulation of novel stepped DC coupled quasi Z-Multilevel Inverter for single phase systems
Autorzy:
Meenakshi, T.
Suthanthira Vanitha, N.
Powiązania:
https://bibliotekanauki.pl/articles/140968.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multilevel inverter
shoot through
quasi Z-Source
modulation index
Opis:
This paper presents the modeling and simulation of a novel topology of quasi Z-Multilevel Inverter with stepped DC input. The proposed inverter incorporates a simple switching technique with reduced component count and is aimed at producing boosted multilevel output AC voltage. The inverter consists of two stages and the buck /boost operation is obtained by varying the shoot through period of the pulses obtained by maximum constant boost control with third harmonic injection. With all the advantages of the quasi Z-network, the proposed inverter eliminates the fly back diodes and capacitors present in a conventional Z-Multilevel Inverter. Further the stress on the devices is less which leads to reduction in component value and hence the cost. The novel stepped DC coupled Single Phase quasi Z-Multilevel Inverter is modeled and simulated in the MATLAB – SIMULINK environment and its performance is analyzed for varying input and switching conditions. The voltage and current waveforms across each stage of the inverter is analyzed and the results are presented for different levels of input.
Źródło:
Archives of Electrical Engineering; 2016, 65, 3; 437-448
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Układ laboratoryjny z wektorową przetwornicą częstotliwości
The laboratory unit with vector frequency inverter
Autorzy:
Siostrzonek, T.
Mondzik, A.
Powiązania:
https://bibliotekanauki.pl/articles/320194.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
wektorowa przetwornica częstotliwości
silnik indukcyjny klatkowy
vector frequency inverter
squirrel cage induction motor
Opis:
W artykule przedstawiono wykonane w Laboratorium Elektroniki Przemysłowej stanowisko dydaktyczne układu napędowego z silnikiem indukcyjnym klatkowym zasilanym z wektorowej przetwornicy częstotliwości. Stanowisko powstało dzięki współpracy Katedr Automatyki Napędu i Urządzeń Przemysłowych z firmą Moeller Electric. Studenci mają więc możliwość zapoznania się z urządzeniami stosowanymi w zakładach przemysłowych. Badanie układu zostało wykonane przez studentów Koła Naukowego Elektroniki Przemysłowej pod nadzorem autorów.
This paper presents the laboratory unit with squirrel cage induction motor supplied by vector frequency inverter. This unit was made thanks to cooperation the Department of Electrical Drive and Industrial Equipment with Moeller Electric. The students have the possibility to know the industrial devices. The research was made by students under the direction of authors.
Źródło:
Elektrotechnika i Elektronika; 2005, 24, 1; 100-105
1640-7202
Pojawia się w:
Elektrotechnika i Elektronika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Falownik trójfazowy ze zmiennym algorytmem sterowania
Three-phase inverter with variable control algorithm
Autorzy:
Szerszeń, Grzegorz
Zygadło, Damian
Powiązania:
https://bibliotekanauki.pl/articles/2086188.pdf
Data publikacji:
2021
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:
przemiennik częstotliwości
falownik
modulacja PWM
sterowanie skalarne
frequency converter
inverter
PWM modulation
scalar control
Opis:
Wpracyprzedstawionobudowę trójfazowegoprzemiennika częstotliwości zmożliwościąwyboru typu modulacji PWM oraz płynną zmianą częstotliwości sygnału modulowanego.Wpraktyczny sposób zrealizowano różne algorytmy sterowania falownikaw tymsamymukładzie sprzętowym zwykorzystaniemprocesora STMARMCortexM3. ZastosowaniemodulacjiTHIPWMpozwoliło zmniejszyć zawartośćharmonicznychw sygnalewyjściowymi efektywniewykorzystaćmożliwości źródła zasilania. Układ posiada możliwość wyboru jednego z dwóch algorytmów sterowania skalarnego, z opcją kompensacji wpływu rezystancji stojana na moment obrotowy wału silnika w początkowym zakresie charakterystyki sterowania liniowego przy stałym stosunku napięcia do częstotliwości. Badania potwierdziły, że najkorzystniejszym typem modulacji PWM w tym układzie jest modulacja jednobiegunowa dwubrzegowa.Wykorzystanie metodyTHIPWM, skutkowało zyskiem amplitudy podstawowej harmonicznej napięcia wyjściowego dla trójfazowego trybu pracy falownika względem metody SPWM. Uzyskano także odpowiednią precyzję kroku regulacji częstotliwości, a rezultaty badań potwierdziły funkcjonalność przemiennika.
The paper presents the construction of a three-phase frequency converter with the possibility of choosing the type of PWM modulation and a smooth change of the frequency of the modulated signal. In a practical way, various inverter control algorithms were implemented in the same hardware system using the STM ARM Cortex M3 processor. The use of THIPWM modulation allowed to reduce the harmonic content in the output signal and effectively use the possibilities of the power source. The system can choose one of two scalar control algorithms, with the option of compensation for the influence of the stator resistance on the motor shaft torque in the initial range of the linear control characteristic at a constant voltage to frequency ratio. The research confirmed that the most advantageous type of PWM in this system is unipolar double-edge modulation. The use of the THIPWM method resulted in a gain in the amplitude of the fundamental harmonic of the output voltage for the three-phase inverter operation mode compared to the SPWM method. The appropriate precision of the frequency control step was also obtained, and the test results confirmed the functionality of the converter.
Źródło:
Science, Technology and Innovation; 2021, 14, 3; 1--11
2544-9125
Pojawia się w:
Science, Technology and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New 13-Level Switched-Capacitor Inverter with Reduced Device Count
Autorzy:
Jena, Kasinath
Panigrahi, Chinmoy Kumar
Gupta, Krishna Kumar
Powiązania:
https://bibliotekanauki.pl/articles/1956000.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
multilevel inverter
switched capacitor
voltage gain
component per level factor
cost function
Opis:
This paper proposed a new voltage-boosting 13-level switched-capacitor (SC) cost-effective inverter. The proposed topology comprises fourteen transistors, three capacitors and a single DC source to produce a 13-level staircase waveform. The capacitor voltage balancing problem is inherently solved by the series/parallel technique. Structural description, working principle, calculation of optimum values of capacitance and modulation scheme are briefly described. The comparative analyses with the existing SC multilevel inverter (MLI) in terms of voltage gain, blocking voltage, total standing voltage (TSV), component per level factor and cost function illustrate the merits of the proposed topology. Further, simulation and experimental results at different loading conditions verify the feasibility of the proposed topology.
Źródło:
Power Electronics and Drives; 2021, 6, 41; 26-41
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie falowników rezonansowych w przemyśle elektromaszynowym i wydobywczym
Application of resonance inverters in the electric machine and mining industry
Autorzy:
Marek, A.
Powiązania:
https://bibliotekanauki.pl/articles/186005.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
Tematy:
falownik L-LC
falownik rezonansowy
inverter L-LC
resonance inverter
Opis:
Celem artykułu jest przedstawienie i omówienie najczęściej stosowanych układów zasilających nagrzewnice indukcyjne, ich właściwości oraz porównanie ich z proponowanym rozwiązaniem w postaci falownika L-LC.
The paper aims at a presentation and a discussion on the mostly used power supply systems for induction heaters, their characteristics and comparison to a suggested system in the form of an inverter L-LC.
Źródło:
Mechanizacja i Automatyzacja Górnictwa; 2009, R. 47, nr 2, 2; 17-22
0208-7448
Pojawia się w:
Mechanizacja i Automatyzacja Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A predictive estimation based control strategy for a quasi-resonant dc-link inverter
Autorzy:
Turzyński, M.
Banach, P.
Murawski, P.
Pepliński, R.
Chrzan, P. J.
Powiązania:
https://bibliotekanauki.pl/articles/200484.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
resonant converters
ZVS three-phase inverter
current estimation
Opis:
Control of parallel quasi resonant dc link inverters (PQRDCLI) is usually based on dc link input inverter current. Instead of a direct measurement of this noise sensitive and fast changing current signal - its estimation with one step prediction may be considered. Estimation of an input inverter current is based on inverter output current measurements, applied in most of power electronics controlled ac drives. In this paper, the PQRDCLI fed induction motor (IM) with a predictive current estimation stabilizes resonant inverter output voltage slopes du/dt independently of load. By control of output voltage derivatives, reduction of overvoltage spikes and common mode motor currents is achieved. An analysis of the PQRDCLI control with a predictive current estimation strategy is verified by the Saber system simulation and experimental tests in a laboratory setup.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 757-762
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Static and dynamic MPP-tracking efficiency of PV-inverter using recorded irradiance
Autorzy:
Marańda, W.
Piotrowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/397987.pdf
Data publikacji:
2013
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
photovoltaics
MPP-tracking
PV inverter
tracking efficiency
fotowoltaika
śledzenie punktu mocy maksymalnej
przekształtnik PV
efektywność śledzenia
Opis:
This paper investigates the energy losses introduced by Maximum Power Point Tracking operation of photovoltaic (PV) inverter. In contrast to other studies, this evaluation has been done with the recorded real-life solar irradiance data applied to the simulation of the PV-generator and tracking algorithm. The true MPP output of photovoltaic generator has been calculated with electro-thermal model and the simulation has been carried out with 1 s time resolution. The efficiency results have been presented for both static and dynamic MPP-tracking investigated With basic and simplified Perturb&Observe algorithm with several tracking speed rates. In addition to the simulation, the inverter efficiency measurements for field- installed inverter have been presented.
Źródło:
International Journal of Microelectronics and Computer Science; 2013, 4, 4; 181-185
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of a permanent magnet motor with an inverter in a drive system of a car. Part 2
Autorzy:
Pawelski, Z.
Uszpolewicz, G.
Powiązania:
https://bibliotekanauki.pl/articles/245003.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
electrical machines
permanent magnet motor
inverter
electric drive control system
Opis:
The article presents a mathematical model of a permanent magnet motor, powered by a three-phase source of sinusoidal voltage, and a control method. Cooperation between numerical integration algorithms in the differential equation system of the motor and an inverter has been verified. The results of numerical simulations are presented in a graphic form. This article is an extension of the publication [12], in which a model of a drive system was proposed, consisting of: a battery, a supercapacitor and a method of controlling these energy sources during a driving cycle of a vehicle. For vector control, the mathematical model of a synchronous machine in the dq coordinate system is the most common one. The most important feature of this control method is the fact that the iq component of the rotor current vector determines the value of motor torque, and the component id – the value of magnetic flux. In the article, the emphasis is put on how inverters work. Their basic task is to generate such currents iabc or voltages uabc to obtain torque without ripples. It leads to development of different control concepts for achieving this goal, which are related to the modelling of magnetic fluxes in a stator and in an inverter.
Źródło:
Journal of KONES; 2018, 25, 4; 325-335
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania falownikowego napędu pompy wodnej z silnikiem indukcyjnym
The Test Inverter Drive the Water Pump with an Induction Motor
Autorzy:
Drabek, T.
Rusek, J.
Powiązania:
https://bibliotekanauki.pl/articles/1368614.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
silnik indukcyjny
diagnostyka
napęd falownikowy
induction motor
diagnostics
inverter driver
Opis:
This paper presents the results of tests of induction water pump drive with an inverter, installed In water supply station. The drive consists of induction motor with a power rating of 132kW, supplyed from voltage inverter with a power rating of 160kW, scalar controlled. The aim of the study was to determine the causes of repeated failures of the inverter. Subject of tests and diagnostic measurements was both, the inwerter and motor. Tests have shown the absence of any abnormalities in the operation of motor, including the lack of damage to the stator and rotor. Over the long-term measurements, there was no overvoltage in the feed of the inverter and the other sections of the drive circuit, that could cause damage of the drive. The conclusion of the tests is to identify the noise in control of the drive as the alleged source of the damage in its power module.
W artykule przedstawiono wyniki badań falownikowego napędu indukcyjnego pompy wodnej, zainstalowanego w wodociągach miejskich. Badany napęd składa się z głębinowego silnika indukcyjnego o mocy znamionowej 132kW, zasilonego z przemiennika częstotliwości o mocy znamionowej 160kW, sterowanego skalarnie. Celem badań było ustalenie przyczyn powtarzających się uszkodzeń części mocy przemiennika. Przedmiotem pomiarów kontrolnych i diagnostycznych był zarówno przemiennik jak i silnik. Badania wykazały brak jakichkolwiek nieprawidłowości w pracy silnika, w tym brak uszkodzeń stojana i wirnika. W ciągu pomiarów długookresowych stwierdzono również brak ew. przepięć na zasilaniu przemiennika i w innych punktach obwodu zasilania napędu, które mogłyby powodować uszkodzenia przemiennika. Konkluzją badań jest wskazanie zakłóceń sterowania samego przemiennika jak domniemanego źródła uszkodzeń jego części mocy.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2013, 1, 98; 13-18
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ground leakage current caused by Common-Mode Voltage of PWM inverter
Prądy upływu doziemnego generowane napięciem wspólnym falownika MSI
Autorzy:
Szymański, Jerzy Ryszard
Żurek-Mortka, Marta
Powiązania:
https://bibliotekanauki.pl/articles/106701.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Technologiczno-Humanistyczny im. Kazimierza Pułaskiego w Radomiu
Tematy:
common-mode voltage
differential-mode voltage
PWM modulation
three-phase traction voltage inverter
two-level PWM inverter
dwupoziomowy falownik MSI
napięcie różnicowe
napięcie wspólne
modulacja MSI
trójfazowy trakcyjny falownik napięciowy
Opis:
In railway tractive vehicles, three-phase PWM (Pulse Width Modulation) inverters generate parasitic Differential-Mode Voltages (DMV) and Common-Mode Voltages (CMV). Parasitic voltages are a side effect of using the width modulation to shape the phase-to-phase inverter’s voltage. In this article, the authors present a mathematical description of the DM and CM voltages and carry out their spectral analysis. Based on the spectral harmonics analysis, the authors present a method for filtration of harmonics of DM and CM voltages aimed at limiting the capacitance parasitic currents: due to DM voltage – phase-to-phase parasitic current and CM voltage – ground parasitic currents. As the final result of the tests, almost complete elimination of leakage parasitic current form PE shock protection system was achieved.
W kolejowych pojazdach trakcyjnych trójfazowe falowniki MSI (Modulacja Szerokości Impulsów) wytwarzają pasożytnicze napięcia różnicowe (Differential Mode Voltage) i wspólne (Common Mode Voltage). Pasożytnicze napięcia są skutkiem ubocznym stosowania modulacji szerokościowej do kształtowania napięć międzyfazowych falownika. W artykule autorzy przedstawiają opis matematyczny napięć DM oraz CM i przeprowadzają ich analizę widmową. Na podstawie przeprowadzanej analizy autorzy przedstawiają metodę filtracji wybranych harmonicznych napięcia DM i CM dla ograniczania wytwarzanych przez nie prądów pasożytniczych: (DM) - międzyfazowych i (CM) – doziemnych. W wyniku badań osiągnięto prawie całkowitą eliminację pasożytniczego prądu upływu doziemnego z systemu ochrony przeciwporażeniowej PE.
Źródło:
Journal of Civil Engineering and Transport; 2019, 1, 1; 15-25
2658-1698
2658-2120
Pojawia się w:
Journal of Civil Engineering and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and experimental examinations of voltage inverter and synchronous generator synchronization system with the use of VisualDSP++ 5.0 environment
Autorzy:
Kozak, M.
Powiązania:
https://bibliotekanauki.pl/articles/97413.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
synchronous generator
machine inverter
Radix–2 FFT
synchronization
DSP
real–time
Opis:
This study describes the operation of the programming algorithm used to synchronize the machine VSI inverter with the rotating synchronous generator. Presented algorithm which bases on the Radix–2 Fourier transform allows to synchronize the inverter with the machine with variable in wide range rotating speed. This study presents the results obtained with use of the simulation software and the auxiliary software created with the use of VisualDSP++ 5.0 development environment and exemplary results of an algorithm operation in the laboratory test stand.
Źródło:
Computer Applications in Electrical Engineering; 2016, 14; 210-219
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on topology of a novel three-phase four-leg fault-tolerant NPC inverter
Autorzy:
Zhang, Baoge
Ping, Shanyan
Long, Yyi
Jiao, Yyuemin
Wu, Bboxiang
Powiązania:
https://bibliotekanauki.pl/articles/2086722.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault tolerant operation
midpoint potential equilibrium
NPC inverter
topology reconstruction
Opis:
Diode neutral point clamped (NPC) three-level converters have been widely used in recent years. Aiming at the problems of the high device failure rate and unstable neutral point potential of NPC three-level converters, an NPC three-level circuit with fourth bridge arm redundancy is proposed based on the traditional NPC three-level converter. The redundant fourth bridge arm is used to realize the function of stabilizing voltage when there is no fault and replacing the fault half-bridge arm to maintain the continuous operation of the converter when there is a fault. By analyzing the working principle of space vector pulse width modulation (SVPWM) and the power loss of the switch, it is of particular significance to the design and control of NPC three-level converters in the future. Matlab/Simulink verifies the feasibility of the fault-tolerant circuit structure.
Źródło:
Archives of Electrical Engineering; 2022, 71, 2; 489--506
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A closed-loop power controller model of series-resonant-inverter-fitted induction heating system
Autorzy:
Pal, P.
Roy, D.
Datta, A.
Sadhu, P. K.
Banerjee, A.
Powiązania:
https://bibliotekanauki.pl/articles/141721.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
induction heating
power controller
PID
series resonant inverter
MATLAB
Opis:
This paper presents a mathematical model of a power controller for a high-frequency induction heating system based on a modified half-bridge series resonant inverter. The output real power is precise over the heating coil, and this real power is processed as a feedback signal that contends a closed-loop topology with a proportional-integral-derivative controller. This technique enables both control of the closed-loop power and determination of the stability of the high-frequency inverter. Unlike the topologies of existing power controllers, the proposed topology enables direct control of the real power of the high-frequency inverter.
Źródło:
Archives of Electrical Engineering; 2016, 65, 4; 827-841
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on low frequency ripple suppression technology of inverter based on model prediction
Autorzy:
Liu, Haiyang
Chen, Yiwen
Luo, Sixu
Jiang, Jiahui
Jian, Haojun
Powiązania:
https://bibliotekanauki.pl/articles/24202730.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
boost type
low frequency ripple suppression
model predictive control
single stage inverter
Opis:
The low frequency ripple of the input side current of the single-phase inverter will reduce the efficiency of the power generation system and affect the overall performance of the system. Aiming at this problem, this paper proposes a two-modal modulation method and its MPC multi-loop composite control strategy on the circuit topology of a single-stage boost inverter with a buffer unit. The control strategy achieves the balance of active power on both sides of AC and DC by controlling the stable average value of the buffer capacitor voltage, and provides a current reference for inductance current of the DC input side. At the same time, the MPC controller uses the minimum inductor current error as the cost function to control inductor current to track its reference to achieve low frequency ripple suppression of the input current. In principle, it is expounded that the inverter using the proposed control strategy has better low frequency ripple suppression effect than the multi-loop PI control strategy, and the conclusion is proved by the simulation data. Finally, an experimental device of a single-stage boost inverter using MPC multi-loop composite control strategy is designed and fabricated, and the experimental results show that the proposed research scheme has good low frequency ripple suppression effect and strong adaptability to different types of loads.
Źródło:
Archives of Electrical Engineering; 2023, 72, 2; 443--460
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensorless five-phase induction motor drive with third harmonic injection and inverter output filter
Autorzy:
Strankowski, P.
Guzinski, J.
Morawiec, M.
Lewicki, A.
Wilczynski, F.
Powiązania:
https://bibliotekanauki.pl/articles/200259.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sensorless control
five-phase induction motor
inverter output filter
multiscalar control
Opis:
The paper presents a sensorless control approach for a five-phase induction motor drive with third harmonic injection and inverter output filter. In the case of the third harmonic injection being utilised in the control, the physical machine has to be divided into two virtual machines that are controlled separately and independently. The control system structure is presented in conjunction with speed and rotor flux observers that are required for a speed sensorless implementation of the drive. The last section is dedicated to experimental results of the drive system in sensorless operation, and the uninterrupted drive operation for two open-phase faults.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 437-445
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Particle swarm optimization of an iterative learning controller for the single-phase inverter with sinusoidal output voltage waveform
Autorzy:
Ufnalski, B.
Grzesiak, L. M.
Gałkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/200271.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
iterative learning control
sine wave inverter
particle swarm optimization (PSO)
Opis:
This paper presents the application of a particle swarm optimization (PSO) to determine iterative learning control (ILC) law gains for an inverter with an LC output filter. Available analytical tuning methods derived for a given type of ILC law are not very straightforward if additional performance requirements of the closed-loop system have to be met. These requirements usually concern the dynamics of a response to a reference signal, the dynamics of a disturbance rejection, the immunity against expected level of system and measurement noise, the robustness to anticipated variations of parameters, etc. An evolutionary optimization approach based on the swarm intelligence is proposed here. It is shown that in the case of the ILC applied to the LC filter, a cost function based on mean squares can produce satisfactory tuning effects. The efficacy of the procedure is illustrated by performing the optimization for various noise levels and various requested dynamics.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 649-660
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regulacja wydajności urządzeń potrzeb własnych elektrowni cieplnych asynchronicznymi napędami falownikowymi średniego napięcia
Variable speed drives with frequency converters in thermal power plant auxiliaries
Autorzy:
Wawszczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/173004.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
elektrownia cieplna
napęd falownikowy
przemiennik
thermal power station
inverter drive
inverter
Opis:
Omówiono możliwości regulacji wydajności urządzeń potrzeb własnych elektrowni cieplnych napędzanych klatkowymi silnikami indukcyjnymi zasilanymi przemiennikami częstotliwości. Skupiono się głównie na napędach średnionapięciowych (6÷10 kV) dużej mocy. Przedstawiono aktualną ofertę przemienników czołowych światowych producentów. Oceniono możliwości wykorzystania tego typu napędów w dużych, nowoczesnych elektrowniach blokowych.
The paper introduces current potential of variable speed drives (VSD) intended for squirrel cage induction motors supplied by frequency converters in thermal power plant auxiliaries. The paper is mostly focused on medium-voltage (6-10 kV) and high-power drives. Current tender of leading world producers in this field has been presented. Possibility to apply this type of drives in large, modern block-power plants has been considered.
Źródło:
Archiwum Energetyki; 2013, 43, 1/2; 87-99
0066-684X
Pojawia się w:
Archiwum Energetyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel circuit topology of modified switched boost hybrid resonant inverter fitted induction heating equipment
Autorzy:
Bhattacharya, A.
Sit, K.
Sadhu, P. K.
Pal, N.
Powiązania:
https://bibliotekanauki.pl/articles/140770.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modified switched boost
high frequency
hybrid resonant inverter
induction heating
controllability
VSI and PSIM
Opis:
A novel circuit topology of modified switched boost high frequency hybrid resonant inverter fitted induction heating equipment is presented in this paper for efficient induction heating. Recently, induction heating technique is becoming very popular for both domestic and industrial purposes because of its high energy efficiency and controllability. Generally in induction heating, a high frequency alternating magnetic field is required to induce the eddy currents in the work piece. High frequency resonant inverters are incorporated in induction heating equipment which produce a high frequency alternating magnetic field surrounding the coil. Previously this high frequency alternating magnetic field was produced by voltage source inverters. But VSIs have several demerits. So, in this paper, a new scheme of modified switched boost high frequency hybrid resonant inverter fitted induction heating equipment has been depicted which enhances the energy efficiency and controllability and the same is validated by PSIM.
Źródło:
Archives of Electrical Engineering; 2016, 65, 4; 815-826
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new circuit topology using Z-source resonant inverter for high power contactless power transfer applications
Autorzy:
Ghosh, P. C.
Sadhu, P. K.
Ghosh, A.
Pal, N.
Powiązania:
https://bibliotekanauki.pl/articles/141006.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
contactless power transfer
mutual inductance
magnetic coupling coefficient
Z-source
resonant inverter
Opis:
In this study, a new circuit topology using a Z-source resonant inverter (ZSRI) for high power applications in large-air-gap contactless power transfer (CPT) systems, has been investigated. The main shortcoming of a large-air-gap CPT system is the poor power transfer efficiency due to low magnetic coupling. In order to minimize this shortcoming and to improve the overall performance of the system by boosting the power transfer capability, in this paper a CPT system with the newly developed circuit topology using high frequency Z-source resonant inverter has been proposed. Using the newly developed circuit topology for the CPT system, it has been observed that the overall performance of the system has been improved to a reasonable level with a purely sinusoidal resonant current flowing through the primary side. Therefore, no harmonics will be injected into the source. The proposed CPT system with an air gap of 16 cm and a misalignment of 3 cm has been simulated using the Maxwell finite element tool and Simplorer circuit simulation software for an output power of 2 kW.
Źródło:
Archives of Electrical Engineering; 2017, 66, 4; 843-854
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Open-Phase Fault Detection Method for Sensorless Five-Phase Induction Motor Drives with an Inverter Output Filter
Autorzy:
Strankowski, Patryk
Guziński, Jarosław
Wilczyński, Filip
Morawiec, Marcin
Lewicki, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/1193764.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
five-phase induction motor
inverter output filter
open-phase fault detection
Opis:
The paper presents the sensorless five-phase induction motor drive implementation with an inverter output filter with third harmonic injection. For the sensorless operation, the required observers are presented for the first and third harmonics with consideration of the inverter output filter. Moreover, the interaction of the observers and the control system is capable to handle a deactivation of one or two phases, which improves the reliability of the complete drive system. A new idea of online open-phase fault detection is presented based on the frequency analysis of the estimated observer variables. The test setup, fault operation capabilities and an experimental verification of the proposed fault detection method are presented in the paper.
Źródło:
Power Electronics and Drives; 2019, 4, 39; 189-200
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of fractional order PI controller using metaheuristics algorithms applied to multilevel inverter for grid connected PV
Autorzy:
Boucheriette, Wafa
Mechgoug, Raihane
Benguesmia, Hani
Powiązania:
https://bibliotekanauki.pl/articles/11541888.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
MLI inverter
fractional order PI
meta-heuristic
PSO
ABC
GWO
THD
metaheurystyka
falownik
układ regulacji
Opis:
Due to its multiple advantages in industrial and grid-connected applications, Multi-Level Inverters (MLIs) have increased in popularity in recent years. To improve the efficiency of a grid-connected PV system's integrated multi-level inverter fractional order PI (FOPI) controllers are used to describe the control process. The control system is made up of three control loops based on FOPI controllers: one for controlling the intermediate circuit voltage (Vdc) and the other two for controlling the direct and quadratic currents (Id, Iq) supplied by the multilevel inverter. The proposed controller parameters (Kp, KI, λ) must be selected in order to increase the efficiency of the multi-level inverter while decreasing the total harmonic distortion (THD) of the output current of the inverter as well as voltage. For this we used three meta-heuristic algorithms (PSO, ABC, GWO). The performance of the three controllers PSO-FOPI, ABC-FOPI and GWO-FOPI controller is compared. The findings showed that GWO-FOPI performs better than the other PSO-FOPI and ABC-FOPI in accuracy and total harmonic distortion THD term. The simulation will be conducted using Matlab/Simulink.
Źródło:
Diagnostyka; 2023, 24, 3; art. no. 2023311
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 276

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