Temat: Inverter - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Three-phase soft-switching inverter with coupled inductors, experimental results
Autorzy:: Karyś, S.
Tematy:: soft-switching
resonant inverter
ZVS inverter; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/200045.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Extended T-type inverter
Autorzy:: Rąbkowski, J.
Kopacz, R.
Tematy:: multilevel inverter
T-type inverter
boost converter
silicon carbide; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/1193496.pdf Link otwiera się w nowym oknie
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%.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Zastosowanie falowników rezonansowych w przemyśle elektromaszynowym i wydobywczym
Application of resonance inverters in the electric machine and mining industry
Autorzy:: Marek, A.
Tematy:: falownik L-LC
falownik rezonansowy
inverter L-LC
resonance inverter; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
Powiązania:: https://bibliotekanauki.pl/articles/186005.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Experimental results of parallel connected inverters feeding medium voltage transformer
Autorzy:: Kozak, M.
Tematy:: electrical transformer
line side inverter
inrush currents
inverter parallel operation; Pokaż więcej
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Powiązania:: https://bibliotekanauki.pl/articles/377860.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

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.
Tematy:: elektrownia cieplna
napęd falownikowy
przemiennik
thermal power station
inverter drive
inverter; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/173004.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

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.
Tematy:: grid impedance
inverter output impedance
LC filter
PI controller
single-phase inverter; Pokaż więcej
Wydawca:: EEEIC International Barbara Leonowicz Szabłowska
Powiązania:: https://bibliotekanauki.pl/articles/136224.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Application of Z-source converter in photovoltaic grid-connected transformer-less inverter
Autorzy:: Farhangi, B.
Farhangi, S.
Tematy:: photovoltaic power conditioner (PV PCU)
gird-connected systems
Z-source inverter
inverter; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Powiązania:: https://bibliotekanauki.pl/articles/262715.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Single-source three-phase switched-capacitor-based MLI
Autorzy:: Jena, Kasinath
Gupta, Krishna Kumar
Bhatnagar, Pallavee
Jain, Sanjay K.
Stala, Robert
Waradzyn, Zbigniew
Piróg, Stanisław
Penczek, Adam
Mondzik, Andrzej
Skała, Aleksander
Tematy:: multilevel inverter
switched capacitor
multicarrier pulse width modulation
cost function
ANPC inverter; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/2175942.pdf Link otwiera się w nowym oknie
Opis:: This article proposes a novel three-phase inverter based on the concept of switched capacitors (SCs), which uses a single DC source. A three-phase, seven-level line-to-line output voltage waveform is synthesised by the proposed topology, which includes eight switches, two capacitors, and one diode per phase leg. The proposed topology offers advantages in terms of inherent voltage gain, lower voltage stresses on power switches, and a reduced number of switching components. Additionally, the switched capacitors are self-balanced, thereby eliminating the need for a separate balancing circuit. The proposed structure and its operating principle, the self-balancing mechanism of the capacitors, and the control strategy are all thoroughly explained in the article. The proposed topology has also been compared with some recent SC topologies. Lastly, the proposed topology has been shown to be feasible through simulation and experimentation.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: GaN-based soft-switched active power buffer operating at ZCS – problems of start-up and shut-down
Autorzy:: Rąbkowski, J.
Król, K.
Zdanowski, M.
Sochacki, M.
Tematy:: GaN
power inverter
active buffer; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/201868.pdf Link otwiera się w nowym oknie
Opis:: This paper describes practical issues related to control of the active power buffer (APB) developed for a 2 kVA single-phase inverter. The buffer is designed using the latest GaN HEMTs controlled with triangular current mode to reduce switching losses, however, the switching frequency should be limited to 1 MHz. In the case of the presented analogue-digital controller, frequency is influenced by a reference current of the APB and circuit. Therefore, the operation at start-up and shut-down is especially challenging. A modified control algorithm that also includes pre-charging and discharging process of the energy buffer is presented and experimentally verified by series of tests of the 2 kVA GaN based inverter with the APB.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

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
Tematy:: fault diagnosis
sensor fault
T-type inverter
three-level inverter
dual
three-phase
PMSM; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/1193713.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "Inverter" wg kryterium: Temat