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Wyszukujesz frazę "current-voltage converter" wg kryterium: Wszystkie pola


Tytuł:
Performance of current-voltage converter with amorphous core
Działanie przetwornika prądowo-napięciowego z rdzeniem amorficznym
Autorzy:
Habrych, M.
Powiązania:
https://bibliotekanauki.pl/articles/1361018.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
amorphous material
current measurement
current-voltage converter
deformed current waveform
materiały amorficzne
pomiary prądu
przetwornik prądowo-napięciowy
zniekształcone przebiegi prądu
Opis:
The paper presents and discusses investigated results of metrological characteristics of a new generation of current-voltage converters manufactured with the use of the innovative technology of soft magnetic components. Current and angle errors of the converters together with current and frequency ranges of their work have been identified.
W artykule przedstawiono i omówiono wyniki badań charakterystyk metrologicznych nowej generacji przetworników prądowo-napięciowych wyprodukowanych przy użyciu innowacyjnej technologii miękkich części magnetycznych. Określono błędy prądowe i kątowe przetworników wraz z zakresami prądowymi i częstotliwościowymi ich pracy.
Źródło:
Mining – Informatics, Automation and Electrical Engineering; 2016, 54, 1; 15-20
2450-7326
2449-6421
Pojawia się w:
Mining – Informatics, Automation and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Upgraded low voltage analog Current-to-Voltage converter with negative feedback
Autorzy:
Wojtyna, R.
Powiązania:
https://bibliotekanauki.pl/articles/397781.pdf
Data publikacji:
2017
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
analog signal processing
current-to-voltage converters
feedback theory
analog CMOS electronics
analogowe przetwarzanie sygnałów
przetworniki prądowo-napięciowe
teoria sprzężenia zwrotnego
CMOS
Opis:
In this paper, an improved version of a current to voltage (C-V) converter is proposed. As compared to the previous version, the number of used transistors has been reduced by 1 and equals 7. The main results of this change are: an improvement of the circuit transfer function linearity, reduction the converter input resistance and decrease of the required supply voltage. Improvements in the considered converter results not only from the reduction of the number of the used transistors but also from the proposed realization of the feedback loop. In this way, it was possibly to get a strong loop gain. As a results, the achieved minimum supply voltage has been reduces from 2V, in case of the previous published converter version, to as low level as 1.2 V, in the case of the newly proposed solution. As for the linearity of the C-V transfer function, apart from its strong loop gain, an important role play also output transistors operating in a small drain to source region (linear region). Working in this region, one obtains a quasi linear voltage to current relationship. The theoretical and simulation results are in a good agreement and are promising.
Źródło:
International Journal of Microelectronics and Computer Science; 2017, 8, 2; 80-84
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stabilność przetwornika prąd–napięcie w spektrometrii ruchliwości jonów
Stability of the current–voltage converter in the ion mobility spectrometry
Autorzy:
Madej, P.
Powiązania:
https://bibliotekanauki.pl/articles/1817812.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
stabilność przetwornika
pasmo przetwornika
elektrometryczny przetwornik transimpedancyjny
spektrometria ruchliwości jonów
Opis:
Analyzed the stability of the high sensitivity current–voltage converter. The relationship between the time constants of the loop impedance and of impedance at the input of the operational amplifier is essential to this problem. Examined several cases led to practical conclusions, affording a wide frequency range and stable operation of the converter.
Źródło:
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2014, 70, 34; 358--364
1733-0718
Pojawia się w:
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pasmo przetwornika prąd–napięcie w spektrometrii ruchliwości jonów
Bandwidth of the current–voltage converter in the ion mobility spectrometry
Autorzy:
Madej, P.
Powiązania:
https://bibliotekanauki.pl/articles/1817754.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
pasmo przetwornika
elektrometryczny przetwornik transimpedancyjny
spektrometria ruchliwości jonów
Opis:
Described a method for the selection of the converter frequency band, which is used to amplify signals from chamber in the ion mobility spectrometer. Bandwidth should not be broad because of the noise and bias current, offset voltage in the OpAmp. Awarded permissible errors of signal amplitude and slope of 5%. Presented formulas to calculate the frequency limits of the converter.
Źródło:
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2014, 70, 34; 352--357
1733-0718
Pojawia się w:
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Versatile low-output-resistance low-voltage current-to-voltage analog converter
Autorzy:
Wojtyna, R.
Powiązania:
https://bibliotekanauki.pl/articles/397867.pdf
Data publikacji:
2016
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
CMOS analog integrated circuits
low-voltage signal processing
current to voltage conversion
transresistor
układy analogowe CMOS
układy scalone CMOS
przetwarzanie sygnałów
konwersja prąd na napięcie
transrezystor
Opis:
The paper presents a simple low-voltage transresistor attractive for on-chip analog-signal-processing. The proposed circuit offers not only an almost rail-to-rail operation and quite good linearity of DC transfer characteristic but also reasonably low value of its output resistance. This enables a voltage mode operation even if the transresistor is loaded by a not necessarily very high loading resistance. The obtained result is due to adding to the transresistor-input-stage a simple rail-to-rail voltage follower. The presented solution is an original proposal of the author. Input stage of the transresistor is built of only 4 MOS transistors and creates a simple quasi-linear current-to-voltage convertor. Output stage of it is built of 9 MOS transistors, plays a role of a very precise atypical voltage follower. In respect of simplicity and headroom, the proposed follower is better than conventional OA-based voltage followers. Preliminary simulation results are in a good agreement with the theory presented.
Źródło:
International Journal of Microelectronics and Computer Science; 2016, 7, 2; 73-78
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Error analysis of current formated by precision voltage-current converter loaded by inductance
Autorzy:
Shkliarskyi, V.
Vasylyuk, V.
Balanyuk, Y.
Powiązania:
https://bibliotekanauki.pl/articles/114381.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
scanning microscope
cathode ray tube
microobject
luminous raster
current control errors
Opis:
In scanning microscope the cathode ray tube of high resolution is used. The screen of this tube is formed by raster consisting of 4096×4096 luminous elements, composing the image. This raster allows to form images of investigated microobject on the screen in a wide range without loss of resolution. The accuracy of imaging on the screen depends on the current setting errors in inductive coils of deflection system. The ways of reducing the static error of the current set in a voltage-current converter are proposed.
Źródło:
Measurement Automation Monitoring; 2015, 61, 8; 403-405
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przetwornik prądowo-napięciowy ze zmodyfikowanym rdzeniem amorficznym do pomiarów prądowych przebiegów odkształconych
Current-to-voltage converter with an amorphous core modified to measure deformed runs of current
Autorzy:
Habrych, M.
Lubryka, J.
Macierzyński, D.
Kozłowski, A.
Morawiec, M.
Powiązania:
https://bibliotekanauki.pl/articles/187748.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
Tematy:
przetworniki prądowo-napięciowe
pomiary przebiegów odkształconych
current-to-voltage converters
measuring deformed runs of current
Opis:
W artykule zaprezentowano i omówiono wyniki badań właściwości metrologicznych przetwornika prądowo-napięciowego z zastosowanym zmodyfikowanym rdzeniem amorficznym przydatnym do pomiarów prądowych, zwłaszcza przebiegów odkształconych w układach napędowych. Wyznaczono wartości błędów prądowych i kątowych przetwornika w szerokim zakresie zmian wartości skutecznych i częstotliwości mierzonych prądów.
The article presents and discusses the results of testing the metrological properties of a current-to-voltage converter with a modified amorphous core adapted to measure the current, particularly deformed runs of current in driving systems. The values of the current- and angle errors were determined in a wide range of the changing values of the effective values and frequencies of the measured currents.
Źródło:
Mechanizacja i Automatyzacja Górnictwa; 2012, R. 50, nr 10, 10; 24-29
0208-7448
Pojawia się w:
Mechanizacja i Automatyzacja Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie przemiennika częstotliwości średniego napięcia z prądem wejściowym kształtowanym sinusoidalnie do pomp wirowych dużej mocy
Electrical drive system with sinusoidal input current of 6 kV voltage frequency converter for big power pump in heat pump-station
Autorzy:
Szulc, Z.
Przybylski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1374332.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
przemiennik częstotliwości
układ napędowy
pompa wirowa
pompownia
Opis:
The papers described application of frequency converter medium voltage to the big power pomp drive system in the Hot Water Pomp Station and presents calculations of energy savings after the modernization. Currently working drive system is failure able and has low efficiency because of its age (over 30 year of working). Applying of new frequency converter medium voltage 6kV, motor and pomp drive and keeping the input and output currents and voltage in sinusoidal wave form allow to increase the efficiency of pomp system more than 10%.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2007, 76; 71-77
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study on fault ride-through capability of VSC-based HVDC transmission system
Autorzy:
Khoa, Ngo Minh
Toan, Nguyen An
Tung, Doan Duc
Powiązania:
https://bibliotekanauki.pl/articles/1841366.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
converter system
experimental waveform
fault ride through
High Voltage Direct Current
voltage sag
system konwertera
eksperymentalny przebieg
prąd stały wysokiego napięcia
spadek napięcia
Opis:
For voltage-source-converter based high-voltage-direct-current (VSC-HVDC)transmission systems, fault ride-through (FRT) capability is a very important grid requirement in order to enhance its operational availability under an alternating current (AC) gridfault condition. Voltage sags during a short-circuit fault in power transmission lines can leadto fluctuations in the direct current (DC) link voltage of converter systems, and may inducereversed power flow and even trip a VSC-HVDC transmission system. A practical methodis developed in this paper for investigating FRT capability of VSC-HVDC transmissionsystem characteristics during a voltage sag event using experimental results from Smart Grid Laboratory. Symmetrical and asymmetrical voltage sag events with different remaining voltages are applied to an AC grid that lasts with a variable duration. The experimental waveforms of the two converter systems are recorded and analyzed in order to evaluate theFRT capability of VSC-HVDC transmission systems.
Źródło:
Archives of Electrical Engineering; 2021, 70, 1; 37-51
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A dual inductor-fed boost converter with an auxiliary transformer and voltage doubler
Autorzy:
Dawidziuk, J.
Powiązania:
https://bibliotekanauki.pl/articles/201526.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
DC/DC boost converter
current-fed
dual inductor-fed
auxiliary transformer
voltage doubler
photovoltaic systems
Opis:
This paper presents a dual inductor-fed boost converter with an auxiliary transformer and voltage doubler for sustainable energy power converters. The new topology integrates a two-phase boost converter and a dual inductor-fed boost converter. The energy stored and transferred by both inductors can attain a wide input-voltage and load range which uses a constant switching frequency, by controlling the time duration of the simultaneous conduction of the two switches. Among other current-fed type boost converters the presented topology is attractive due to the high voltage conversion ratio, less stress on the components and less switch conduction loss. To verify the feasibility of this topology, the principles of operation, theoretical analysis, and experimental waveforms are presented for a 1 kW prototype.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 787-791
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities for determining the interference between a power supply network and a converter fed drive
Autorzy:
Beniak, R.
Gardecki, A.
Powiązania:
https://bibliotekanauki.pl/articles/1193393.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
power quality
converter drives
voltage and current measurements
Opis:
Measuring instruments, measurement methods, and an exemplary analysis of the impact of chosen operating stages of the converter drive on the power supply network have been presented. The measurements of electrical and mechanical parameters in drive systems used in industry are complex. The task is difficult due to the necessity of connecting a measuring instrument into electric circuits of an active facility with the use of only short non-operational periods of the device. However, a wellchosen model of a drive system allows the multivariate research of the impact of drive parameters and a control algorithm used on voltage and current harmonic content and performance of the system, and therefore on a simulation analysis of the impact of the drive on the power supply network.
Źródło:
Power Electronics and Drives; 2017, 2, 37/1; 17-26
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grid-tied converter operated under unbalanced and distorted grid voltage conditions
Autorzy:
Gałecki, A.
Michalczuk, M.
Kaszewski, A.
Ufnalski, B.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/200867.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grid tied converter
AC/DC converter
current controller
resonant controller
particle swarm optimization (PSO)
Opis:
The paper presents a three-phase grid-tied converter operated under unbalanced and distorted grid voltage conditions, using a multi-oscillatory current controller to provide high quality phase currents. The aim of this study is to introduce a systematic design of the current control loop. A distinctive feature of the proposed method is that the designer needs to define the required response and the disturbance characteristic, rather than usually unintuitive coefficients of controllers. Most common approach to tuning a state-feedback controller use linear-quadratic regulator (LQR) technique or pole-placement method. The tuning process for those methods usually comes down to guessing several parameters. For more complex systems including multi-oscillatory terms, control system tuning is unintuitive and cannot be effectively done by trial and error method. This paper proposes particle swarm optimization to find the optimal weights in a cost function for the LQR procedure. Complete settings for optimization procedure and numerical model are presented. Our goal here is to demonstrate an original design workflow. The proposed method has been verified in experimental study at a 10 kW laboratory setup.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 2; 389-398
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Precision Calculations of the Characteristic Impedance of Complex Coaxial Waveguides Used in Wideband Thermal Converters of AC Voltage and Current
Autorzy:
Kubiczek, Krzysztof
Kampik, Marian
Powiązania:
https://bibliotekanauki.pl/articles/2124756.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AC voltage standard
current shunt
characteristic impedance
multilayer cylindrical conductor
FEM simulation
modified Bessel functions
numerical stability
calorimetric thermal voltage converter
ac-dc transfer difference
Opis:
The article presents precision and numerically stable method of calculation of the characteristic impedance of cylindrical multilayer waveguides used in high-precision wideband measuring instruments and standards, especially calculable thermal converters of AC voltage and precision wideband current shunts. Most of currently existing algorithms of characteristic impedance calculation of such waveguides are based upon approximations. Unfortunately, application of such methods is limited to waveguides composed of a specific, usually low number of layers. The accuracy of approximation methods as well as the number of layers is sometimes not sufficient, especially when the coaxial waveguide is a part of precision measurement equipment. The article presents the numerically stable matrix analytical formula using exponentially scaled modified Bessel functions to compute characteristic impedance and its components of the cylindrical coaxial multilayer waveguides. Results obtained with the developed method were compared with results of simulations made using the Finite Element Method (FEM) software simulations. Very good agreement between results of those two methods were achieved.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 3; 527--533
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of inductor current ringing in DCM on output voltage of DC-DC buck power converters
Autorzy:
Walczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/141175.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inductor current ringing
DCM
BUCK converter
parasitic capacitance
electromagnetic compatibility in DC-DC converters
Opis:
Ringing of an inductor current occurs in a DC-DC BUCK converter working in DCM when current falls to zero. The oscillations are the source of interferences and can have a significant influence on output voltage. This paper discusses the influence of the inductor current ringing on output voltage. It is proved through examples that the oscillations can change actual value of duty a cycle in a way that makes the output voltage difficult to predict.
Źródło:
Archives of Electrical Engineering; 2017, 66, 2; 313-323
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-Cartesian Frame Transformation-Based Control of a Three-Phase Power Converter During Unbalanced Voltage Dip – Part II: Simulation And Experiment
Autorzy:
Iwański, Grzegorz
Maciejewski, Paweł
Łuszczyk, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1193687.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
AC/DC
power conversion
current control
current limitation
Opis:
The paper presents a control method for the three-phase power converter operating under unbalanced grid voltage conditions. The method uses a new transformation to the non-Cartesian frame, which makes the controlled current vector components balanced in this frame even if originally the three-phase current is referenced as unbalanced. Furthermore, Park’s transformation makes the controlled variables constant, which allows to apply proportional–integral terms as current controllers independent of the required control target. Several control targets known from literature have been analyzed with regard to the required new transformation parameters, and the transformation parameters for all targets have been found. Simulation results are shown to prove the theoretical analysis, and the experimental test results are presented as practical validation of the proposed use of the non-Cartesian frame in control.
Źródło:
Power Electronics and Drives; 2019, 4, 39; 63-77
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł

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