Temat: chopper - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Three-phase hybrid transformer using matrix-chopper as an interface between two AC voltage sources
Autorzy:: Kaniewski, J.
Fedyczak, Z.
Szcześniak, P.
Powiązania:: https://bibliotekanauki.pl/articles/950668.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hybrid transformer
power system
matrix chopper
Opis:: This paper deals with a three-phase power system with hybrid transformer (HT) installed between two AC sources. The main aim of this paper is analyze the basic properties of HT with active load and ability to bidirectional energy flow. The HT contains two main units – a conventional transformer with electromagnetic coupling and PWM AC line chopper connected with secondary windings with electric coupling. The HT is located between the distribution system and a Local Balancing Area (LBA) with low power local energy sources. After describing the HT circuit and three-phase, twosources power system, the mathematical and circuit models of the AC source with HT are presented. These models are verified by means of the simulation and experimental test results obtained for a three-phase HT of about 3 kVA rated power.
Źródło:: Archives of Electrical Engineering; 2014, 63, 2; 197-210
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Modelling and analysis of the quadrature-booster phase shifter with PWM AC bipolar matrix-reactance chopper and passive load
Autorzy:: Fedyczak, Z.
Jankowski, M.
Szcześniak, P.
Powiązania:: https://bibliotekanauki.pl/articles/262819.pdf
Data publikacji:: 2006
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:: AC power system
phase shifter
PWM AC matrix chopper
Opis:: This paper deals with a quadrature-booster phase shifter for power flow control and for transient stability improvement in AC transmission systems. The PWM AC bipolar matrix chopper (MC) is proposed for the control of the qudrature voltage component of the original voltage. There are presented in this paper both steady and transient state analyses of a transmission system with passive load based on averaged circuit models. Furthermore, simulation and experimental test results obtained in a three-phase 3 kVA laboratory model are also presented.
Źródło:: Electrical Power Quality and Utilisation. Journal; 2006, 12, 2; 83-93
1896-4672
Pojawia się w:: Electrical Power Quality and Utilisation. Journal
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Analiza stanu nieustalonego w obwodzie silnika skokowego z układem czoperowym
Analysis of transient in the circuit of the stepper motor with chopper system
Autorzy:: Zajkowski, K.
Duer, S.
Powiązania:: https://bibliotekanauki.pl/articles/313902.pdf
Data publikacji:: 2011
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: układ czoperowy
silniki skokowe
diagnostyka
chopper system
stepper motors
diagnostics
Opis:: W artykule przedstawiono analizę stanu nieustalonego w obwodzie prądu zasilającego pasmo silnika skokowego przy zastosowaniu układu czoperowego. Omówiono zjawiska występujące w układzie bez elementu ograniczającego przepięcia. Przedstawiono wyniki symulacji przy zastosowaniu nieliniowego elementu ochronnego.
This article presents an analysis of transient current flowing in the winding of the stepper motor using a chopper system. Discussed are phenomena occurring in the system without limiting element voltages. The results of simulations using a nonlinear element which limits overvoltages has been presented.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2011, 12, 5; 471-476
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Power flow controller based on bipolar direct PWM AC/AC converter operation with active load
Autorzy:: Kaniewski, Jacek Zbigniew
Powiązania:: https://bibliotekanauki.pl/articles/141487.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: power flow controller
direct AC/AC converter
matrix chopper
power quality
Opis:: The uncontrolled power flow in the AC power system caused by renewable energy sources (restless sources, distributed energy sources), dynamic loads, etc., is one of many causes of voltage perturbation, along with others, such as switching effects, faults, and adverse weather conditions. This paper presents a three-phase voltage and power flow controller, based on direct PWM AC/AC converters. The proposed solution is intended to protect sensitive loads against voltage fluctuation and problems with power flow control in an AC power system. In comparison to other solutions, such as DVR, UPFC, the presented solution is based on bipolar matrix choppers and operates without a DC energy storage unit or DC link. The proposed solution is able to compensate 50% voltage sags, in the case of three-phase symmetrical voltage perturbation, and single phase voltage interruptions. Additionally, by means of a voltage phase control with a range of 60◦ in each phase, it is possible to control the power flow in an AC power system. The paper presents an operational description, a theoretical analysis based on the averaged state space method and four terminal descriptions, and the experimental test results from a 1 kVA laboratory model operating under active load.
Źródło:: Archives of Electrical Engineering; 2019, 68, 2; 341-356
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Design and Noise Analysis of a Novel Auto-Zeroing Structure for Continuous-Time Instrumentation Amplifiers
Autorzy:: Maréchal, S.
Nys, O.
Krummenacher, F.
Chevroulet, M.
Kayal, M.
Powiązania:: https://bibliotekanauki.pl/articles/226106.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: front-end
instrumentation amplifier
low-noise
low power
chopper
auto-zero
Opis:: This paper introduces a low-noise, low-power amplifier for high-impedance sensors. An innovative circuit using an auto-zeroed architecture combined with frequency modulation to reject offset and low-frequency noise is proposed and analysed. Special care was given to avoid broadband noise aliasing and chopping in the signal path, and to minimize both the resulting equivalent input offset voltage and equivalent input biasing current. The theoretical noise analysis of the proposed topology covers most of the noise sources of the circuit. Simulations show that the input-referred noise level of the circuit is 13.4nV/√Hz for a power consumption of 85µA with a power supply from 1.8V to 3.6V.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 4; 397-404
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Effects of source voltage harmonics on power factor compensation in ac chopper circuits
Autorzy:: Balci, M. E.
Hocaoglu, M. H.
Powiązania:: https://bibliotekanauki.pl/articles/262639.pdf
Data publikacji:: 2008
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:: harmonics
ac chopper circuits
power factor
reactive power compensation
nonsinusoidal conditions
Opis:: In recent years, the detailed modelling of power electronic devices and their behaviours on various system conditions are a great concern of the power industries and customers. One of the widely proliferated such devices is the triac controlled ac choppers. Although these types of devices have important application areas, their poor power factor is the main obstacle for the large scale implementation in power systems. This paper presents an analysis on the behaviour of a single phase load composed with triac controlled ac chopper during the reactive power compensation with a basic capacitor in nonsinusoidal voltage case. The results of these analysis show that the distortion of voltage improves power factor, which is contradicting with previous findings, for the high conduction angles of triac controlled ac chopper. In addition, it is observed that the performance of power factor improvement with a basic capacitor is noticeably affected by the phase angles of voltage harmonics, which is an extensively ignored issue in the literature.
Źródło:: Electrical Power Quality and Utilisation. Journal; 2008, 14, 1; 53-60
1896-4672
Pojawia się w:: Electrical Power Quality and Utilisation. Journal
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Real-time implementation of an interconnected observer design for p-cells chopper
Autorzy:: Laidi, K.
Benmansour, K.
Ferdjouni, A.
Bouchhida, O.
Powiązania:: https://bibliotekanauki.pl/articles/141378.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: obserwator
switching modes
zasilanie
p-cell chopper
observer design
interconnected observer
Opis:: This paper deals with an observer design for a p-cell chopper. The goal is to reduce drastically the number of sensors in such system by using an observer in order to estimate all the capacitor voltages. Furthermore, considering an instantaneous model of a p-cell chopper, an interconnected observer is designed in order to estimate the capacitor voltages. This is realized by using only the load current measurement. Simulation results are given in order to illustrate the performance of such observer. To demonstrate the validity of our approach, experimental results based on Digital Signal Processor (DSP) are presented.
Źródło:: Archives of Electrical Engineering; 2010, 59, 1-2; 5-20
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Design of integrated readout circuit for NMOS THZ detectors based on chopper ampliﬁer concept
Autorzy:: Kołaciński, C
Obrębski, D.
Zagrajek, P.
Powiązania:: https://bibliotekanauki.pl/articles/397722.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: NMOS-based terahertz detector
chopper ampliﬁer
instrumentation amplifier
voltage controlled ampliﬁer
programmable gain ampliﬁer
readout circuit
detektor terahercowy
chopper
wzmacniacz instrumentacyjny
wzmacniacz sterowany napięciem
wzmacniacz PGA
obwód odczytujący
Opis:: This paper deals with design of readout circuit dedicated for NMOS-based terahertz detectors. The proposed architecture bases on chopper ampliﬁer and instrumentation ampliﬁer concepts. The main objectives were high gain (max. 100 dB) and proper operation with NMOS-based THz detectors. Three different architectures of measurement ampliﬁer designed for the research project are discussed in this paper. The designed chip was manufactured in AMS C35B4 process (350 nm feature size). Another issue described in this paper is dedicated, non-typical testing environment. At the end a few measurement results are shown.
Źródło:: International Journal of Microelectronics and Computer Science; 2014, 5, 1; 14-24
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Low-noise micro-power chopper amplifier for MEMS gas sensor
Autorzy:: Nebhen, J.
Meillere, S.
Masmoudi, M.
Seguin, J.-L.
Barthelemy, H.
Aguir, K.
Powiązania:: https://bibliotekanauki.pl/articles/397694.pdf
Data publikacji:: 2011
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: czujnik gazu
niskie szumy
analogowy układ scalony
gas sensor
low-noise
low-power
chopper modulation
analog integrated circuits
Opis:: In this paper, a low-noise, low-power and low voltage Chopper Stabilized CMOS Amplifier (CHS-A) is presented and simulated using transistor model parameters of the AMS 0.35 μm CMOS process. This CHS-A is dedicated to high resistive gas sensor detection. The proposed CHS-A using Chopper Stabilization technique (CHS) exhibits an equivalent input referred noise of only 0.194 nV/√Hz for a chopping frequency of 210 kHz under ۫.25 V supply voltage and 26.5 dB voltage gain. The inband PSRR is above 90 and the CMRK exceeds 120 dB. At the same simulation condition, the total power consumption is 5 μW only.
Źródło:: International Journal of Microelectronics and Computer Science; 2011, 2, 4; 146-155
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Design of multichannel readout system for spectral identification of materials
Autorzy:: Kołaciński, C.
Obrębski, D.
Zbieć, M.
Zagrajek, P.
Powiązania:: https://bibliotekanauki.pl/articles/397795.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: terahertz spectroscopy
terahertz FET-based detector
chopper ampliﬁer
integrated readout circuit
readout system
AVR ATMega
spektroskopia terahercowa
wzmacniacz przerywacz
obwód scalony
obwód odczytujący
Opis:: This paper addresses the work performed on development of the readout circuits for FET-based THz detectors. Ultimately, designed readout system is intended to work within the material identification equipment, which targeted to perform the spectral recognition of samples. At the beginning, the short introduction of the THz detection basics and main applications of the THz spectroscopy are presented. Next, the preceding work on single-channel readout circuit is shortly recalled, with a special emphasis on the last design version featuring selective chopper amplifier. This IC became the basis of the complete readout system addressed in next few sections of this paper. Finally, design of novel integrated circuit is presented, incorporating the multichannel readout circuit dedicated for pixel line.
Źródło:: International Journal of Microelectronics and Computer Science; 2015, 6, 2; 35-42
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "chopper" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język