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Wyświetlanie 16-30 z 92
Tytuł:
Coupled static and dynamic FE analyses of a nonlinear electromechanical vibration energy harvester
Autorzy:
Kulik, M.
Jagieła, M.
Powiązania:
https://bibliotekanauki.pl/articles/97381.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
energy harvesting
coupled structural–electromagnetic analysis
finite element analysis
Opis:
The paper presents the coupled static and dynamic mechanical–electromagnetic finite element analyses of an electromechanical vibration energy harvesting converter with permanent–magnet excitation. The system consists of a small, milliwatt power range, linear–motion generator connected to a cantilever–beam spring element. The finite element equations derived for the mechanical part of the system according to the 1–D Timoshenko beam theory are coupled strongly with those describing the 2–D distribution of magnetic field in the generator and those associated with the electric circuit. The considered electromechanical coupling allows for prediction of static and dynamic response of the system subjected to action of externally applied force. The static displacement of the moving element is computed via solution of the nonlinear system of equations and is used as an initial solution in dynamic analysis. For computation of the dynamic response of the system the time–stepping procedure based on the Crank– Nicolson discretisation schema is applied. The models are positively validated against the measurements carried out on the laboratory test–stand.
Źródło:
Computer Applications in Electrical Engineering; 2016, 14; 256-267
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-displacement electret-based energy harvesting system for powering leadless pacemakers from heartbeats
Autorzy:
Maamer, Bilel
Jaziri, Nesrine
Said, Mohamed Hadj
Tounsi, Fares
Powiązania:
https://bibliotekanauki.pl/articles/2202554.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electret-based system
electrostatic harvester
energy harvesting
heartbeats vibration
Opis:
In vivo biomedical devices are one of the most studied applications for vibrational energy harvesting. In this paper, we investigated a novel high-displacement device for harvesting heartbeats to power leadless implantable pacemakers. Due to the location peculiarities, certain constraints must be respected for the design of such devices. Indeed, the total dimension of the system must not exceed 5.9 mm to be usable within the leadless pacemakers and it must be able to generate accelerations lower than 0.25 m/s2 at frequencies of less than 50 Hz. The proposed design is an electrostatic system based on a square electret of dimension 4.5 mm. It is based on the Quasi-Concertina structure, which has a very low resonant frequency of 26.02 Hz and a low stiffness of 0.492 N/m, allowing it to be very useful in such an application. Using a Teflon electret charged at 1000 V, the device was able to generate an average power of 10.06 μW at a vibration rate of 0.25 m/s2 at the resonant frequency.
Źródło:
Archives of Electrical Engineering; 2023, 72, 1; 229--238
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absorption Enhancement in Si Solar Cells by Incorporation of Metallic Nanoparticles: Improved COMSOL Numerical Study Including Quantum Corrections
Autorzy:
Kluczyk, K.
Krzemińska, Z.
Jacak, W.
Powiązania:
https://bibliotekanauki.pl/articles/1033865.pdf
Data publikacji:
2017-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
solar cells
solar energy harvesting
surface plasmons
metallic nanoparticles
Opis:
One of the crucial parameters affecting the solar cell efficiency is the absorption rate versus solar spectrum. Metallic nanoparticles deposited on the cell surface can mediate this process. Main mechanisms of absorption enhancement due to metallic nanoparticle plasmons were proposed: (1) the scattering of incident solar light causing increase of the optical path length inside active layer and local enhancement of the electric field; (2) near field coupling between plasmon and semiconductor and the direct generation of electron-hole pairs in the semiconductor. The field concentration effect can be described by classical electrodynamic theory, the coupling between metallic nanoparticle plasmons and band electrons in semiconductor substrate must be captured upon quantum mechanics. In this paper we took the challenge to develop fast and reliable method for calculation of device optical properties by application of COMSOL system appropriately configured to take into account these quantum effects, via the quantum modification of the dielectric function of semiconductor substrate and metallic components. The presented results indicate that the efficiency of energy transfer due to near field coupling of metallic nanoparticle plasmons with semiconductor substrate is much more effective than the absorption increase due to metallic nanoparticle plasmons scattering only.
Źródło:
Acta Physica Polonica A; 2017, 132, 2; 393-397
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coupled dynamic FE analysis of permanent-magnet mechanical vibration energy harvesting converter
Autorzy:
Kulik, M.
Jagieła, M.
Powiązania:
https://bibliotekanauki.pl/articles/377720.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
energy harvesting
coupled structural-electromagnetic analysis
finite element analysis
Opis:
The paper presents a coupled dynamic mechanical-electromagnetic finite element analysis of a vibration energy harvesting converter with permanent-magnet excitation. The system consists of a small, miliwatt power range, linear-motion permanent-magnet generator connected to a cantilever-beam spring element. The finite element equations derived for the mechanical part of the system according to the 1-D Timoshenko beam theory are coupled strongly with equations describing the 2-D distribution of magnetic field in the generator and those associated with the electric circuit. The time-stepping procedure based on the Crank-Nicolson discretisation schema is applied to the obtained system of differential-algebraic equations. The model is shown to provide satisfactory predictions of the system dynamic performance which is confirmed experimentally.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2016, 85; 245-254
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generating of electricity from magnetoelectric composite with use of changes in direction of magnetic field vector
Autorzy:
Mech, R.
Powiązania:
https://bibliotekanauki.pl/articles/347476.pdf
Data publikacji:
2017
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
SMART materials
Energy Harvesting
magnetostriction
active materials
Terfenol-D
Opis:
Paper shows study on the magnetoelectric composite material placed in an external magnetic field with changing magnetic field vecotr. An experimental setup for investigation of magnetoelectric properties of magnetostrictive-piezoelectric material was prepared. The hybrid structure is made of magnetostrictive composite (based on Terfenol-D) and piezoelectric material. Experimental results shown the response of prepared hybrid material to the rate of changes of direction of magnetic field vector. Investigation were mainly focused on possibility of generating of electric power from prepared material. It was found that the prepared hybrid material exhibits magnetoelectric effect in the case of work when direction of magnetic field vector was changing. This effect might be use in Energy Harvesting applications.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2017, 4; 283-293
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low voltage integrated converter for waste heat thermoelectric harvesters
Autorzy:
Dziurdzia, P.
Mysiura, M.
Gołda, A.
Powiązania:
https://bibliotekanauki.pl/articles/221706.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
charge pump
DC-DC conversion
thermoelectric conversion
energy harvesting
Opis:
The paper deals with an application-specific integrated circuit (ASIC) facilitating voltage conversion in thermoelectric energy harvesters. The chip is intended to be used to boost up the voltage coming from a thermoelectric module to a level that is required by electronic circuits constituting wireless sensor nodes. The designed charge pump does not need any external parts for its proper operation because all the capacitors, switches and oscillator are integrated on the common silicon die. The topography of the main functional blocks and post-layout simulations of the designed integrated circuit are shown in the article.
Źródło:
Metrology and Measurement Systems; 2012, 19, 1; 159-168
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal Design of Piezoelectric Actuators for Shunt Damping Techniques
Autorzy:
Neubauer, M.
Powiązania:
https://bibliotekanauki.pl/articles/176597.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
piezoelectric transducer
piezoelectric shunt damping
piezoelectric energy harvesting
vibration damping
Opis:
In vibration control with piezoceramics, a high coupling of the piezoelement with the structure is desired. A high coupling improves the damping performance of passive techniques like shunt damping. The coupling can be influenced by a the material properties of the piezoceramics, but also by the placement within the structure and the size of the transducer. Detailed knowlegde about the vibration behavior of the structure is required for this. This paper presents an in-depth analysis of the optimal shape of piezoelectric elements. General results for one-dimensional, but inhomogeneos strain distribution are provided. These results are applied to the case of a longitudinal transducer and a bending bimorph. It is obtained that for maximum coupling, only a certain fracture of the volume should be made of piezoelectric material. . .
Źródło:
Archives of Acoustics; 2014, 39, 4; 615-622
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy recovery from a non-linear electromagnetic system
Autorzy:
Kęcik, K.
Powiązania:
https://bibliotekanauki.pl/articles/386921.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
magnetic pseudo-levitation
energy harvesting
vibration
electromagnetic coupling
attractor coexistence
Opis:
The paper presents study of a pseudo-magnetic levitation system (pseudo-maglev) dedicated for energy harvesting. The idea rely on motion of a pseudo-levitating magnet in a coil’s terminal. The study based on real prototype harvester system, which in the pendulum dynamic vibration absorber is applied. For some parameters, the stability loss caused by the period doubling bifurcation is detected. The coexistence of two stable solutions, one of which is much better for energy harvesting is observed. The influence of the pseudo-maglev parameters on the recovered current and stability of the periodic solutions is presented in detail. The obtained results show, that the best energy recovery occurs for the high pseudo-maglev stiffness and close to the coil resistance. The amplitude’s excitation, the load resistances and the coupling coefficient strongly influence on the system’s response.
Źródło:
Acta Mechanica et Automatica; 2018, 12, 1; 11-18
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania eksperymentalne hybrydowego układu PV-TEG
Experimental Studies of Hybrid PV–Peltier Module System
Autorzy:
Matecki, D.
Powiązania:
https://bibliotekanauki.pl/articles/377246.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
zjawisko Peltiera
zjawisko Seebecka
ogniwo fotowoltaiczne
ogniwo termoelektryczne
energy harvesting
Opis:
Niniejsza praca przedstawia wyniki badań eksperymentalnego układu składającego się z ogniwa PV oraz ogniwa termoelektrycznego. Celem badań jest sprawdzenie możliwości wykorzystania ogniwa termoelektrycznego jako odbiornika ciepła odpadowego pochodzącego z ogniwa fotowoltaicznego do wytworzenia energii elektrycznej przy jednoczesnym chłodzeniu panelu PV i wykorzystaniu tej energii do zasilenia odbiorników małej mocy w systemach autonomicznych, np. stacjach pomiarowych lub sygnalizacyjnych.
This paper presents the results of an experimental system consisting of a photovoltaic cell (PV) and thermoelectric generator (TEG). The aim of the research is the possibility of using TEG as a receiver of waste heat from the photovoltaic cell to generate electricity while cooling the PV panel and use this energy to power low–power receivers in autonomous systems, eg. measurement or signaling stations.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2017, 89; 367-372
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of nanostructured bulk cobalt triantimonide doped with tellurium and indium prepared by pulsed plasma in liquid method
Autorzy:
Zybała, R.
Schmidt, M.
Kaszyca, K.
Chmielewski, M.
Kruszewski, M. J.
Jasiński, M.
Rajska, M.
Ciupiński, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/200831.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermoelectric materials
nanostructured materials
skutterudite
energy harvesting
spark plasma sintering
Opis:
One of the ways to decrease thermal conductivity is nano structurization. Cobalt triantimonide (CoSb3) samples with added indium or tellurium were prepared by the direct fusion technique from high purity elements. Ingots were pulverized and re-compacted to form electrodes. Then, the pulsed plasma in liquid (PPL) method was applied. All materials were consolidated using rapid spark plasma sintering (SPS). For the analysis, methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM) with a laser flash apparatus (LFA) were used. For density measurement, the Archimedes’ method was used. Electrical conductivity was measured using a standard four-wire method. The Seebeck coefficient was calculated to form measured Seebeck voltage in the sample placed in a temperature gradient. The preparation method allowed for obtaining CoSb3 nanomaterial with significantly lower thermal conductivity (10 Wm–1K–1 for pure CoSb3 and 3 Wm–1K–1 for the nanostructured sample in room temperature (RT)). The size of crystallites (from SEM observations) in the powders prepared was about 20 nm, joined into larger agglomerates. The Seebeck coefficient, α, was about –200μVK–1 in the case of both dopants, In and Te, in microsized material and about −400 μK−1 for the nanomaterial at RT. For pure CoSb3 , α was about 150 μVK−1 and it stood at −50 μVK−1 for nanomaterial at RT. In bulk nanomaterial samples, due to a decrease in electrical conductivity and inversion of the Seebeck coefficient, there was no increase in ZT values and the ZT for the nanosized material was below 0.02 in the measured temperature range, while for microsized In-doped sample it reached maximum ZT = 0.7 in (600K).
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 1; 125-134
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of waste heat recovery for automobile application based on a thermoelectric module
Autorzy:
Buchalik, R.
Buczkowski, D.
Przybyła, G.
Nowak, G.
Powiązania:
https://bibliotekanauki.pl/articles/243601.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy harvesting
combustion engine
heat recovery
exhaust gas
thermoelectric effect
Opis:
The article presents a brief discussion about issues of energy harvesting of waste heat generated during the operation of the SI (spark ignition) internal combustion engine (ICE). The available methods of implementation and the problems associated with them were presented. In recent years, there has been an increase in the significance of successful researches on new types of thermoelectric modules. Despite relatively low efficiency of the thermoelectric modules, a systematic growth in their interest is observed. Their application seems to be reasonable because of many advantages - mainly the simplicity. The paper contains the literature review in the subject of interest. For the purpose of this work, a test rig was designed and manufactured. The test rig consists of a single thermoelectric module and makes it possible to work in variety of operating conditions for different values of the exhaust gas flow rate and temperature. It is equipped with an automatic, servo controlled, movable element, which control direction of the exhaust gas flow and as a result changes the heat flux transferred via the thermoelectric module. This solution allows achieving the maximum power of the thermoelectric module in a wide range of ICE operating conditions and also allows adjusting operating parameters to actual working conditions of the whole system. The problems encountered during the construction of the test rig and the proposed solutions of practical implementation were described. Experimental research was conducted on a small size automobile petrol engine. The influence of electrical parameters at the output on the whole system was analysed. The results suggest that the actual thermoelectric module parameters, especially the thermal conductivity, vary from declared by the producer. Maximum achieved electric power output reached about 10 W from a single thermoelectric module (57 mm x 54 mm), which is nearly half of the declared value.
Źródło:
Journal of KONES; 2016, 23, 4; 25-32
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Autonomous Wearable Sensor Node for Long-Term Healthcare Monitoring Powered by a Photovoltaic Energy Harvesting System
Autorzy:
Mohsen, Saeed
Zekry, Abdelhalim
Youssef, Khaled
Abouelatta, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/227109.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy harvesting
healthcare monitoring
wearable sensor nodes
photovoltaic
Bluetooth low energy (BLE)
Opis:
In this paper, an autonomous wearable sensor node is developed for long-term continuous healthcare monitoring. This node is used to monitor the body temperature and heart rate of a human through a mobile application. Thus, it includes a temperature sensor, a heart pulse sensor, a low-power microcontroller, and a Bluetooth low energy (BLE) module. The power supply of the node is a lithium-ion rechargeable battery, but this battery has a limited lifetime. Therefore, a photovoltaic (PV) energy harvesting system is proposed to prolong the battery lifetime of the sensor node. The PV energy harvesting system consists of a flexible photovoltaic panel, and a charging controller. This PV energy harvesting system is practically tested outdoor under lighting intensity of 1000 W/m². Experimentally, the overall power consumption of the node is 4.97 mW and its lifetime about 246 hours in active-sleep mode. Finally, the experimental results demonstrate long-term and sustainable operation for the wearable sensor node.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 2; 267-272
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ położenia i kształtu elementu piezoelektrycznego na pozyskiwaną energię elektryczną
Influence of the piezoelectric element position and shape on energy harvesting
Autorzy:
Nowak, R.
Pietrzakowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/404174.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Symulacji Komputerowej
Tematy:
piezoelektryk
belka
MES
pozyskiwanie energii elektrycznej
piezoelectric
beam
FEM
energy harvesting
Opis:
W niniejszej pracy skupiono się na zbadaniu wpływu kształtu i położenia generatora piezoelektrycznego na pozyskiwane napięcie. Rozważono układ mechaniczny w postaci belki wysięgnikowej z przyklejonym przetwornikiem piezoelektrycznym, spolaryzowanym poprzecznie. Zastosowano generator w kształcie prostokątnym i trójkątnym. Na podstawie obliczeń analitycznych dokonano wyboru możliwie efektywnego generatora. Wyznaczono charakterystyki amplitudowo-częstotliwościowe wytwarzanego napięcia w przypadku drgań belki w zakresie pierwszej i drugiej częstotliwości rezonansowej. Do obliczeń porównawczych, przeprowadzonych metodą elementów skończonych (MES), wybrano generator prostokątny, rozłożony na dwóch trzecich długości powierzchni belki. Wykazano zadowalającą zgodność wyników uzyskanych metodą analityczną i MES.
This study focuses on examining the influence of the shape and position of the piezoelectric generator on the harvested voltage. The considered mechanical system is the cantilever beam with the glued transversely polarized piezoelectric transducer. Both rectangular and triangular generators were used. Using analytical calculations, the generator's shape was selected as efficiently as possible. Amplitude-frequency characteristics were determined in the first and second resonant frequency range. The rectangular generator covering two-thirds of the upper surface of the beam was selected for comparative calculations. The results of both methods were compared with acceptable agreement.
Źródło:
Symulacja w Badaniach i Rozwoju; 2012, 3, 3; 131-140
2081-6154
Pojawia się w:
Symulacja w Badaniach i Rozwoju
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja autonomicznego układu do dezynfekcji wody
Concept of autonomic water disinfection unit
Autorzy:
Ferlin, T.
Galias, P.
Galla, S.
Powiązania:
https://bibliotekanauki.pl/articles/267470.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
odzyskiwanie energii
mikro-wytwornica
przepływ wody
energy obtaining
energy harvesting
microgenerator
water flow
Opis:
W artykule poruszono temat pozyskania energii z nietypowych źródeł. Przedstawiono wyniki prac nad prototypem układu wykorzystującego przepływ strumienia wody jako źródło energii. Zakładano pozyskanie strumienia zarówno z naturalnych cieków wodnych jak i z domowych instalacji wodnych. W pracy sprawdzano koncepcję zastosowania odzyskanej energii do zasilania diod UV – C mających na celu zmniejszenie zagrożenia mikrobiologicznego dla ludzi i zwierząt.
The paper presents the results of work on the prototype of the circuit for harvesting energy from not typical source and presents the concept of its use. The source of energy for proposed solution is a flow of water. It was assumed that the water flow in domestic water installation and natural waterways could be used. In addition the proposition of acquired energy application was proposed tested the possibility to use the energy to power a UV – C LED. Emitted UV – C light could be used to reduce microbiological contamination of water. The system has the ability to be used mainly on farms using the outer waterway as a water source or optionally could be installed in high quality requirements water distribution networks.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2016, 51; 49-53
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przegląd metod pomiaru małych energii dla oceny układów „energy-harvesting” i systemów mikromocowych
Review of measurement methods of small energy for the assesment of "energy-harvesting" circuits and micropower systems
Autorzy:
Palmowski, D.
Lentka, G.
Hojka, A.
Powiązania:
https://bibliotekanauki.pl/articles/268995.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
pomiar małych energii
system mikromocowy
measurement of small energy
energy harvesting
micropower system
Opis:
W artykule omówiono trzy metody pomiaru małych energii dla oceny układów zasilania typu „energy-harvesting” i systemów mikromocowych. Opisano klasyczną metodę techniczną, jak i estymację energii zarówno poprzez pomiar ładunku oraz wykorzystanie równoważenia ładunku. Niezależnie od metody pomiaru, zwrócono uwagę na specyficzny, impulsowy i nieregularny charakter poboru energii przez systemy mikromocowe oraz podobny impulsowy charakter energii wytwarzanej przez przetworniki energy harwester (EH).
The article is concern on the issues of measurement methods of small energy low-power devices which collecting the Energy avilable in the enviroment. The main difficulty in constructing such devices is an estimation of energy demand. The average power consumption the low-power system is typically calculated in microwatts. Accurate measurement of the energy consumed by a typical micropower system is problematic - measuring device must have a large dynamic range. It is assumed that the measured currents can be varied by at least two orders of magnitude. There must be a wide band width due to the fact that a large current is consumed in a very short time (pulse). Similar requirements determine the measurement of the Energy supplied from alternative sources. Electrical energy available at the output of converter usually appears irregularly in pulses of varying intensity of current and different voltages. For this reasons technical method and use of current-voltage converters are useless. The another method assumes sampling the signals of supply voltage and current and performing multiplication and integration numerically, but it have a number of drawbacks. Charge counting method gives more reliable results than the voltage and current measurement, even using high-speed A/D converters. Unfortunately, it is problematic to use the circuit in this form to measure the amount of energy generated by the EH source, because the measured current is flowing out of the system. The concept of measurement based on the principle of operation on the A/D converters to the load balancing is a bit more complicated in hardware implementation. The meter built according to the Figure 6 allows the measurement of the flow charge with an accuracy not worse than 2.5% on the highest resolution, and not worse than 1.2% for a resolution of 5 thousand plots. This type of device may measure the charge flowing in one direction, for example from the source to the battery.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2016, 51; 139-142
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 16-30 z 92

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