Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "pulse width" wg kryterium: Temat

  Lista filtrów

Dostawca treści

Wyrównaj
Wyświetlanie 1-15 z 34
Tytuł:
Existence and stabilizability of steady-state for semilinear pulse-width sampler controlled system
Autorzy:
Wang, J.
Powiązania:
https://bibliotekanauki.pl/articles/255665.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
pulse-width sampler system
compact semigroup
steady-state
existence
stabilizability
Opis:
In this paper, we study the steady-state of a semilinear pulse-width sampler controlled system on infinite dimensional spaces. Firstly, by virtue of Schauder's fixed point theorem, the existence of periodic solutions is given. Secondly, utilizing a generalized Gronwall inequality given by us and the Banach fixed point theorem, the existence and stabilizability of a steady-state for the semilinear control system with pulse-width sampler is also obtained. At last, an example is given for demonstration.
Źródło:
Opuscula Mathematica; 2011, 31, 1; 105-118
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of a Class-D Audio Amplifier With Analog Volume Control for Mobile Applications
Autorzy:
El Khadiri, K.
Qjidaa, H.
Powiązania:
https://bibliotekanauki.pl/articles/226924.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
class D amplifier
analog volume control
pulse width modulation (PWM)
ramp generator
Opis:
A class-D audio amplifier with analog volume control (AVC) for portable applications is proposed in this paper. The proposed class-D consist of two sections. First section is an analog volume control which consists of an integrator, an analog MUX and a programmable gain amplifier (PGA). The AVC is implemented with three analog inputs (Audio, Voice, FM). Second section is a driver which consists of a ramp generator, a comparator, a level shifter and a gate driver. The driver is designed to obtain a low distortion and a high efficiency. Designed with 0.18 um 1P6M CMOS technology, the class-D audio amplifier with AVC achieves a total root-mean-square (RMS) output power of 0.5W, a total harmonic distortion plus noise (THD+N) at the 8-Ω load less than 0.06% and a power efficiency of 90% with a total area of 1.74 mm2.
Źródło:
International Journal of Electronics and Telecommunications; 2016, 62, 2; 187-198
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Powiązania:
https://bibliotekanauki.pl/articles/2175942.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
multilevel inverter
switched capacitor
multicarrier pulse width modulation
cost function
ANPC inverter
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.
Źródło:
Power Electronics and Drives; 2022, 7, 42; 197--209
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of integrodifferential control system with pulse-width modulated sampler on Banach spaces
Autorzy:
Wang, J.
Powiązania:
https://bibliotekanauki.pl/articles/255995.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
integrodifferential system
pulse-width modulated sampler
steady-state control
steady-state stability
Opis:
This paper studies steady-state control and stability for a class of integrodifferential control system with pulse-width modulated sampler on Banach spaces. The existence and stability of the steady-state for the integrodifferential control system with pulse-width modulated sampler are given. An example is given to illustrate the theory.
Źródło:
Opuscula Mathematica; 2012, 32, 1; 179-197
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Averaged models of pulse-modulated DC-DC power converters. Part II. Models based on the separation of variables
Autorzy:
Janke, W.
Powiązania:
https://bibliotekanauki.pl/articles/140855.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power converters
pulse width modulation (PWM)
BUCK
buck-boost
BOOST
averaged models
Opis:
The separation of variables approach to formulate the averaged models of DC-DC switch-mode power converters is presented in the paper. The proposed method is applied to basic converters such as BUCK, BOOST and BUCK-BOOST. The ideal converters or converters with parasitic resistances, working in CCM and in DCM mode are considered. The models are presented in the form of equation systems for large signal, steady-state and small-signal case. It is shown, that the models obtained by separation of variables approach differ in some situations from standard models based on switch averaging method.
Źródło:
Archives of Electrical Engineering; 2012, 61, 4; 633-654
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Averaged models of pulse-modulated DC-DC power converters. Part I. Discussion of standard methods
Autorzy:
Janke, W.
Powiązania:
https://bibliotekanauki.pl/articles/140859.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power converters
pulse width modulation (PWM)
BUCK
BOOST
buck-boost
averaged models
Opis:
The averaged models of switch-mode DC-DC power converters are discussed. Two methods of averaged model derivation are considered - the first, based on statespace averaging and the second, on the switch averaging approach. The simplest converters: BUCK, BOOST and BUCK-BOOST working in CCM (continuous conduction mode) or DCM are taken as examples in detailed considerations. Apart from the ideal converters, the more realistic case of converters with parasitic resistances is analyzed. The switch averaging approach is used more frequently than the other and is believed to be more convenient in practical applications. It is shown however, that in the deriving the averaged models based on the switch-averaging approach, some informalities have been made, which may be the source of errors in the case of converters with parasitic resistances, or working in DCM mode.
Źródło:
Archives of Electrical Engineering; 2012, 61, 4; 609-631
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation on Control Strategies for a Single-Phase Photovoltaic Inverter Using PSCAD/EMTDC Software
Autorzy:
Henz, Cristiano Luiz
Gasparin, Fabiano Perin
Powiązania:
https://bibliotekanauki.pl/articles/1956010.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
DC/DC converter
DC/AC converter
photovoltaic module
pulse width modulation
solar energy
Opis:
In the last decades, electric power produced through photovoltaic conversion has been increasing because of the need to reduce fossil fuel burning. Recently, photovoltaic systems have become more competitive and their role in the renewable energies market share is steadily gaining in importance. Improvements in the power electronics employed in the DC/AC conversion are topics of interest in the quest for more efficient and eventually reduced-cost inverters. The goal of this paper is to perform an investigation of control strategies and propose a topology for a single-phase DC/AC converter for photovoltaic arrays using the simulation software Power System Computer Aided Design/Electromagnetic Transient Design and Control (PSCAD/EMTDC). The circuit proposed in this paper employs an isolating transformer to a grid-connected photovoltaic inverter. The control strategy proposed uses the instantaneous reactive power theory (p–q theory) and phase-locked loop (PLL). The p-q theory uses two virtual axes in the Park Transformation, which provide to the control system a good dynamic response, accuracy, and decoupling between the control and power system. Computer simulations using the electromagnetic transient software PSCAD show the efficiency of the proposed strategy for a single-phase inverter. The control strategy and topology are quite simple and easy to implement in the future using a Digital Signal Processor (DSP). The results provide insights into new power electronics solutions, which can improve the efficiency and efficacy of the current available in DC/AC converters for photovoltaic systems.
Źródło:
Power Electronics and Drives; 2021, 6, 41; 75-99
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DC-link voltage balancing in cascaded H-Bridge converters
Autorzy:
Lewicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/141491.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cascaded H-Bridge converter
DC-link voltage balancing
space-vector pulse width modulation
Opis:
In this paper a DC-link voltage balancing strategy for multilevel Cascaded H-Bridge (CHB) converter is proposed. Presented solution bases on optimal choice of active vector durations in Space-Vector Pulse Width Modulation (SV-PWM). It makes it possible to DC-link voltages control and to properly generate the output voltage vector in the case of DC-link voltage unbalance. Results of simulation and experimental researches on proposed control strategy are presented in the paper.
Źródło:
Archives of Electrical Engineering; 2014, 63, 3; 439-455
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of PWM to trajectory accuracy in mobile robot motion
Autorzy:
Beniak, R.
Pyka, T.
Powiązania:
https://bibliotekanauki.pl/articles/384557.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
mobile robot control
kinematic and dynamic control
castor sliding wheel
pulse width modulation (PWM)
Opis:
The paper compares simulation results for direct and PWM control of DC motors in a tri-wheel mobile robot with a castor sliding wheel. Our aim was to determine to what extent PWM control changes the trajectory accuracy. For this purpose, we compare kinematic and dynamic control. To make the model more realistic, we considered the impact of viscous and rolling friction of driving wheels on the motion along the trajectory. We conclude that dynamic control is of higher quality as compared to kinematic control, and that there is a significant impact of PWM control on the trajectory accuracy.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 4; 50-56
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Experiment of the Actual Vertical Resolution of the Sub-bottom Profiler in an Anechoic Tank
Autorzy:
Wang, Fangqi
Dong, Lifeng
Ding, Jisheng
Zhou, Xinghua
Tao, Changfei
Lin, Xubo
Liang, Guanhui
Powiązania:
https://bibliotekanauki.pl/articles/177846.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
SBP
sub-bottom profiler
PW
pulse width
vertical resolution
DRE
duration of reflection event
Opis:
Sub-bottom profiler (SBP) is an acoustic instrument commonly used to survey underwater shallow geological structure and embedded objects whose most important performance parameter is the actual vertical resolution. This paper presented a methodology to measure and evaluate the actual vertical resolution of SBP based on an experiment in an anechoic tank, which was divided into three components: building of artificial geological model, measurement of acoustic parameters, and determination of actual vertical resolution of the acoustic profiles. First, the wedge-shaped geological model, whose thickness could be accurately controlled, was designed and built in an anechoic tank to try to directly measure the vertical resolution of SBP. Then, the acoustic pulse width of SBP was measured to calculate the theoretical general vertical resolution and extreme vertical resolution. Finally, based on the acoustic profiles obtained in the experiment, the method which was used to evaluate the actual vertical resolution by measuring the duration of reflection event was put forward. Due to comparing measurement data of different parameter settings of the SBP, the study has revealed that the SBP had the lowest resolution in the 4 kHz–500 μs setting, which was 226.5μs, or 36.2 cm, and the highest resolution in the 15 kHz–67 μs setting, which was 72.7 μs, or 11.6 cm. The vertical resolution decreased with the increase of the pulse width. The results also showed that the actual resolution was close to the theoretical general resolution and far from the extreme resolution.
Źródło:
Archives of Acoustics; 2019, 44, 1; 185-194
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wpływu układu przełączającego na napięcie wytwarzane przez źródło wzorcowego napięcia stałego
Analysis of the influence of the switching circuit on the voltage generated by the source of a standard DC voltage
Autorzy:
Popek, G.
Kampik, M.
Tokarski, J.
Powiązania:
https://bibliotekanauki.pl/articles/151424.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
kalibrator
wzorzec napięcia stałego
modulator szerokości impulsu
calibrator
DC voltage standard
pulse-width modulator
Opis:
W pracy przeanalizowano wpływ czasów załączania i wyłączania układów przełączających modulatorów szerokości impulsu na napięcie wyjściowe wytwarzane przez wielomiarowe źródło wzorcowego napięcia stałego. Zaproponowano modyfikację układu umożliwiającą zmniejszenie tego wpływu.
Analysis of the effect of turn-on and turn-off times of switches in the pulse-width modulators on the voltage generated by the source of a standard DC voltage is presented in the paper. A modification of the circuit leading to reduction of this effect is also proposed.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 9, 9; 70-73
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development and tests of PWM amplifier for driving the piezoelectric elements
Autorzy:
Matiulko, J.
Poźniak, T.
Przygoda, K.
Grecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/397949.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
wzmacniacz PWM (modulacja szerokości impulsu)
piezoelektryczne elementy
PWM (pulse width modulation) amplifier
piezoelectric elements
Opis:
The paper describes the design and research work carried out to prepare the prototype of pulse amplifier. The work was aimed to describe main operational parameters of PWM amplifiers enabling using them to control the piezoelectric actuators used for active compensation of Lorentz force detuning of superconducting cavities.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 1; 69-72
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grid-Tied Neutral Point Clamped based Centralised Photovoltaic Inverter with Improved DC Link Voltage Balancing and Harmonic Minimisation Control
Autorzy:
Bhowmick, Supratik
Mukherjee, Debranjan
Maiti, Suman
Chakraborty, Chandan
Powiązania:
https://bibliotekanauki.pl/articles/1955983.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
photovoltaic multilevel inverter
neutral point voltage balancing
space vector pulse width modulation
current harmonic minimisation
Opis:
This paper proposes an improved space vector pulse width modulation (SVPWM) based DC link voltage balancing control of a three-phase three-level neutral point clamped (NPC) centralised inverter supplying the generated power from photo voltaic (PV) array to a three-phase utility grid. Two possible schemes have been developed based on the power conversion stage between PV array and the utility grid namely, two-stage (three-level boost converter three-phase three-level NPC inverter) and single-stage (three-phase three-level NPC inverter alone). The comparison between these two schemes has been thoroughly discussed in terms of the control strategies employed, power loss analysis and efficiency. The performance of the centralised inverter under different modes of operation has been investigated by developing the required control strategies for smooth operation. Using the proposed control strategy, the centralised inverter can be operated as a static synchronous compensator (STATCOM) during night time, if needed. The power loss incurred in the power-electronic converters has been analysed for constant and also for variable ambient temperature. The effectiveness of the centralised inverter as an active filter (AF) has also been verified when a three-phase non-linear load is considered in the system.
Źródło:
Power Electronics and Drives; 2021, 6, 41; 185-203
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Bidirectional Buck-Boost Converter-Based Switching Ripple Communication Strategy for Intelligent Street Lighting Systems
Autorzy:
Zhang, Yixuan
Hu, Yihua
Tse, Zion
Liu, Yuwei
Deng, Jiamei
Xu, Hui
Wang, Yangang
Li, Wei
Powiązania:
https://bibliotekanauki.pl/articles/1955998.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bidirectional switching ripple communication
buck-boost converter
intelligent street lighting system
pulse width modulation
smart city
Opis:
The light-emitting diode (LED) is an essential component of intelligent street lighting (ISL) systems. An efficient ISL system can not only reduce power consumption by planning LED illuminating time but also reduce maintenance costs through a high degree of automation. In this paper, a buck-boost converter is used to realise composite transmission of power and signals for an ISL system. The power is modulated by the pulse width modulation (PWM) approach, and the switching ripple generated in the PWM process is utilised as the carrier of the signals transmitted between the remote-control centre and the slave nodes. Moreover, the proposed model involves a ‘request to send (RTS)/confirm to send (CTS)’ mechanism to avoid signal conflicts. Compared with the conventional power line communication (PLC) approach, the proposed transmission scheme has the advantages of simple circuit structure and simple system wiring. Additionally, a simulation model built in MATLAB/Simulink proves the designed transmission method has strong anti-noise ability.
Źródło:
Power Electronics and Drives; 2021, 6, 41; 260-275
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Galvanic separation of analogue signals
Separacja galwaniczna sygnałów analogowych
Autorzy:
Molenda, T.
Chmielarz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1361023.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
sygnały analogowe
separacja galwaniczna
PWM
linearyzacja
galvanic separation
analogue systems
pulse width modulation (PWM)
nonlinearity correction
Opis:
The article deals with the issues of galvanic separation of analogue circuits and methods to perform it. The authors described capacitive, inductive and optical couplings, separation with the use of processing as well as non-linearity correction of optoelectronic materials characteristics. The available solutions were presented and their characteristics.
Artykuł poświęcony jest zagadnieniom związanym z separacją galwaniczną obwodów analogowych i sposobom jej realizacji. Opisano w nim sprzężenia pojemnościowe, indukcyjne i optyczne, separację z zastosowaniem przetwarzania oraz linearyzację charakterystyk elementów optoelektronicznych. Przedstawiono dostępne rozwiązania i ich właściwości.
Źródło:
Mining – Informatics, Automation and Electrical Engineering; 2016, 54, 3; 5-10
2450-7326
2449-6421
Pojawia się w:
Mining – Informatics, Automation and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 34

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies