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Wyświetlanie 1-15 z 126
Tytuł:
Thermoelastic problem of an axially moving microbeam subjected to an external transverse excitation
Autorzy:
Abouelregal, A. E.
Zenkour, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/279181.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
thermoelasticity
microbeam
sinusoidal pulse heating
axially moving
transverse excitation
Opis:
In this study, the problem of an axially moving microbeam subjected to sinusoidal pulse heating and an external transverse excitation is solved. The generalized thermoelasticity theory with one relaxation time is used to solve this problem. An analytical technique based on the Laplace transform is used to calculate the vibration of deflection and the temperature. The inverse of Laplace transforms are computed numerically using Fourier expansion techniques. The effects of the pulse-width of thermal vibration, moving speed and the transverse excitation are studied and discussed on the lateral vibration, temperature, displacement and bending moment of the beam.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 1; 167-178
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of excitation energy transfer in PSII particles of Arabidopsis thaliana mutant clpC1
Autorzy:
Adamiec, M.
Lucinski, R.
Gibasiewicz, K.
Giera, W.
Sipinska, W.
Jackowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/80441.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
excitation energy transfer
Arabidopsis thaliana
clpC1 mutant
polypeptide
time-resolved fluorescence
regulatory protein
chloroplast
apoprotein
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of Auditory Filters Based Excitation Patterns for Assessment of Noise Induced Hearing Loss
Autorzy:
Al-Dayyeni, W. S.
Sun, P.
Qin, J.
Powiązania:
https://bibliotekanauki.pl/articles/176368.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
noise induced hearing loss
excitation pattern
basilar membrane motion
auditory filter
noise assessment metrics
Opis:
Noise induced hearing loss (NIHL) as one of the major avoidable occupational related health issues has been studied for decades. To assess NIHL, the excitation pattern (EP) has been considered as one of the mechanisms to estimate the movements of the basilar membrane (BM) in the cochlea. In this study, two auditory filters, dual resonance nonlinear (DRNL) filter and rounded-exponential (ROEX) filter are applied to create two EPs, the velocity EP and the loudness EP respectively. Two noise hazard metrics are proposed based on two EPs to evaluate hazardous levels caused by different types of noise. Moreover Gaussian noise and single-tone noise are simulated to evaluate performances of the proposed EPs and the noise metrics. The results show that both EPs can reflect the responses of the BM to different types of noise. For Gaussian noise there is a frequency shift between the velocity EP and the loudness EP. The results suggest that both EPs can be used for assessment of NIHL.
Źródło:
Archives of Acoustics; 2018, 43, 3; 477-486
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Capability of synchronous machines to ride through events with high ROCOF
Autorzy:
Assenkamp, Alf
Kreischer, Christian
Kulig, Stefan
Powiązania:
https://bibliotekanauki.pl/articles/140451.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ROCOF
under-excitation protection
turbo-generator
low-inertia grids
Opis:
The transition of power grids to implement large amounts of nonsynchronous renewables reduces the inertia in the power system. Therefore, the rate of change of fre- quency (ROCOF) after a fault of given energy is higher in low inertia grids than in grids with mainly synchronous machines operating. Standard faults for the design of existing synchronous machines assume fixed frequency grids, in which an electrically close fault happens. It is not tested, if the machines can ride through transient disturbances with high ROCOF. For ROCOF values of up to 1 Hz/s as foreseen for the upcoming grid code of the Republic of Ireland and up to 2 Hz/s for Northern Ireland, a thorough verification, if generators are capable to ride through such events is necessary. For this study, ROCOF frequency traces provided by the transmission system operators (TSOs) of Ireland were first benchmarked with a full-grid model and in a second step impressed on a model of generators connected to the power grid via a step-up transformer to study transient stability and nonlinear response of the generator. This paper focusses on the ability of nine different synchronous machines to stay connected to the transmission system during severe ROCOF events without losing synchronism.
Źródło:
Archives of Electrical Engineering; 2019, 68, 2; 325-339
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the piezoelectric thimble tactile device operating modes
Autorzy:
Bansevicius, R.
Dragasius, E.
Grigas, V.
Jurenas, V.
Mazeika, D.
Zvironas, A.
Powiązania:
https://bibliotekanauki.pl/articles/307079.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
skóra
wymuszenie harmoniczne
analiza elementów skończonych
tactile sensation
skin strain
harmonic excitation
finite element analysis
Opis:
A multifunctional device to transfer graphical or text information for blind or visually impaired is presented. The prototype using tactile perception has been designed where information displayed on the screen of electronic device (mobile phone, PC) is transferred by oscillating needle, touching the fingertip. Having the aim to define optimal parameters of the fingertip excitation by needle, the computational analysis of different excitation modes has been carried out. A 3D solid computational finite element model of the skin segment, comprising four main fingertip skin layers (stratum corneum, epidermis, dermis and hypodermis) was built by using ANSYS Workbench FEA software. Harmonic analysis of its stress–strain state under excitation with different frequency (up to 10000 Hz) and harmonic force (0.01 N), acting outer stratum corneum layer in normal direction at one, two or three points has been performed. The influence of the mode of dynamic loading of skin was evaluated (in terms of the tactile signal level) on the basis of the normal and shear elastic strain in dermis, where mechanoreceptors are placed. It is shown that the tactile perception of information, delivered by three vibrating pins, may be influenced by configuration of excitation points (their number and phase of loading) and the frequency of excitation.
Źródło:
Acta of Bioengineering and Biomechanics; 2014, 16, 3; 135-143
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engine fuel characterisation based on excitation-emission spectra
Autorzy:
Baszanowska, E.
Otremba, Z.
Powiązania:
https://bibliotekanauki.pl/articles/246580.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fuel
diesel
engine
excitation-emission spectra
fluorescence
Opis:
Considering that correctly functioning of diesel ship engine depends on the composition of applied fuel, it is necessary to easy characterise fuels in terms of quality. Therefore taking into account above mentioned, appropriate analyses have been undertaken and the intention of this article is to inform that characterisation of fuel used in marine transport can be described by the specific parameter based on fluorescence excitation-emission spectroscopy. Therefore, for this study fuel typically used in ship engine – Diesel fuel – is considered. For analysis, Diesel fuel dissolved in n-hexane was used and several oil samples for various oil concentration were prepared. Spectrofluorometer Aqualog Horiba was used to record the excitation-emission spectra (EEMs). EEM spectra determined for each of oil concentration were described by two specific peaks for this kind of oil. Based on registered EEMs, the specific indicator - the wavelength-independent fluorescence maximum – coded in two specific wavelengths – excitation and emission, respectively, described as Exmax/Emmax was determined for considered oil concentration. Obtained results indicate the independence from oil concentration only for one detected peak described by Exmax/Emmax = 240/332. Taking into account obtained results, we can conclude that the wavelength-independent fluorescence maximum detected for excitation wavelength at 240 nm corresponds to the emission wavelength at 332 nm due to the independence from the oil concentration, could be a good indicator to characterise this kind of oil – Diesel fuel. We can conclude that the changes in the composition of fuel could be detected in EEM spectra by the change of detected peaks position.
Źródło:
Journal of KONES; 2017, 24, 2; 25-30
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fluorescence spectra of oil after it contacts with aquatic environment
Autorzy:
Baszanowska, E.
Otremba, Z.
Toczek, H.
Rohde, P.
Powiązania:
https://bibliotekanauki.pl/articles/245054.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
oil pollution
fluorescence spectroscopy
excitation-emission spectra
seawater
environment protection
Opis:
The main task for natural marine environment protection is to prevent the inflow of various contaminants including oil substances and the real challenge is the ability to rapidly detect these pollutants. Moreover important is to find the source or the maker of the oil spill. In this paper, we consider fundamental physical aspects in the area of possibility of monitoring the natural marine ecosystem based on fluorescence spectroscopy. We utilize the fluorescence ability of numerous oil components – mainly polycyclic hydrocarbons. The paper concerns the spectrofluorimetric characterization of oils have been in use during exploitation of the marine fleet, i.e. lubricate oil, fuels, transformer and hydraulic oils as well as crude oils or their residues. Every kind of oil has a chance to enter the marine environment, especially in a case of ship emergency or after collision with other vessel ore shoreline structure as well as when ship enters the stranding. After discharge of oil, some of oil components are dissolved in the water, bacteria or photochemical reactions, which results in transformation of composition of oil, degrade some. Fluorescence spectrometer Perkin Elmer LS55 was applied to obtain the fluorescence spectra using different excitation wavelength in the range from 240 nm to 500 nm. We discuss the changes of the shapes of excitationemission spectra (EEMs) of various types of oil and the EEMs spectra after contact of oil with seawater as an oil-inwater emulsion, which is the most frequent form of oil in the water column. Significant changes in the shape of spectra and displacement of the peaks are observed.
Źródło:
Journal of KONES; 2013, 20, 3; 29-34
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of the Baltic crude oil in the oil-in-water emulsion form : excitation-emission spectra
Autorzy:
Baszanowska, E.
Otremba, Z.
Powiązania:
https://bibliotekanauki.pl/articles/246400.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
crude oil
excitation-emission spectra
fluorescence
seawater
ropa naftowa
fluorescencja
woda morska
Opis:
Due to the fact that marine environment contamination by oil substances are not uncommon, it is necessary to improve the ability of determine their origin. Therefore, research on the possibility of recognizing the type of oil using its individual characteristic manifested in the processes of fluorescence excitation has been undertaken. Oil pollutants present in seawater mainly coming from ship drives, tankers, pipelines or sea bottom seeps, moreover oil leaks from offshore extraction equipment also are possible. For this reason, the crude oil extracted from the Baltic Sea deposit in the Polish Maritime Areas has been chosen for tests. Fluorescence properties of water containing small amounts of oil (concentrations from 5.59 to 55.4 ppm) in the form of oil-in-water emulsion were tested. Individual samples were assigned matrices of fluorescent values for different wavelengths, while excited by monochromatic light also for different wavelengths. The obtained matrices were visualized as a contour maps and 3D charts. For considered concentrations of crude oil dispersed in water, the wavelength-independent fluorescence maximum was determined. Obtained result indicates that in the studied wavelength range, the total fluorescence intensity is proportional to the oil concentration only for the lowest oil concentrations. The analysis of the objective parameter of the difference between the shapes of spectra indicates the similarity of the spectral shape for the lowest oil concentrations. These results are the methodological suggestion, that for the purpose of identifying the type of oil dispersed in water, spectra should be determined for sequences of different dilutions, until the excitation-emission spectra shapes become independent from the oil concentration.
Źródło:
Journal of KONES; 2018, 25, 1; 7-14
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectrofluorimetric characteristics of used lubricating oil
Spektrofluorymetryczna charakterystyka zużytego oleju smarnego
Autorzy:
Baszanowska, E.
Otremba, Z.
Powiązania:
https://bibliotekanauki.pl/articles/328239.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
fluorescence
excitation-emission spectra of oil
lubricate oil
ship engine
fluorescencja
zupełne widmo fluorescencji
olej smarny
silnik okrętowy
Opis:
Deterioration of lubricate oil in combustion engines enforces measurements of parameters essential for proper operation of define driving system or to certain engine malfunctions indicate. Since the fluorescence phenomenon is known for oil excited by ultraviolet light - the question arises whether fluorescence spectra evolving with the time of exploitation of oil in the engine. In this paper the introductory studies of excitation-emission spectra (EEMs) for chosen lubricate oil are described. Both fresh and used oil (after 593 h of work in a ship engine), was used to measure EEMs. As a result of comparison of EEMs for both fresh and used lubricate oils more significant transformations in fluorescence spectra of oil caused by their exploitation are indicated. Obtained results allow to predict that spectrofluorimetry method could supplement present methods of used lubricating oil testing.
Pogarszanie się właściwości oleju smarnego w silniku spalinowym skutkuje koniecznością monitorowania jego eksploatacyjnych parametrów. Z racji wykazywania przez oleje fluorescencji w świetle ultrafioletowym - powstaje pytanie, czy widma fluorescencji ewoluują wraz z czasem przebywania oleju w obiegu smarnym silnika. W artykule opisane są wstępne analizy zmian zupełnych widm fluorescencji (EEMs) dla różnych stężeń wybranego oleju smarnego. Do pomiaru EEMs oleju użyto dwóch form oleju – świeżego i przepracowanego w silniku okrętowym w czasie 593 h. W następstwie porównania widm uzyskanych dla świeżego i przepracowanego oleju wskazano na zachodzące najbardziej znaczące zmiany we fluorescencji oleju smarnego. Uzyskane wyniki pozwalają sądzić, że spektrofluorymetria mogłaby uzupełnić obecne metody testowania przepracowanego oleju.
Źródło:
Diagnostyka; 2014, 15, 4; 65-71
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of scaffolding harmonic excitation
Autorzy:
Bęc, Jarosław
Błazik-Borowa, Ewa
Szer, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2204503.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
scaffolding
harmonic excitation
dynamic analysis
direct integration
rusztowanie
wzbudzenie harmoniczne
analiza dynamiczna
integracja bezpośrednia
Opis:
Scaffolding is equipment usually used at construction sites. A scaffolding structure is lightweight and made of elements used many times. The characteristics of scaffolding make it susceptible to dynamic actions present at the structure or occurring nearby. A scaffolding structure of medium size was subjected to analysis in this paper. The structure FEM model was loaded with single force harmonic excitation with various frequencies ranging from 1 Hz to 12 Hz applied in one of many selected points on the scaffolding façade. In the first step, natural frequencies and mode shapes of the analyzed structure were calculated. Then the full dynamic analysis was carried out to obtain maximum displacements of selected control points. The relation of excitation force frequency and location to the amplitudes of generated displacement was observed. It was found that low excitation frequencies close to the natural frequencies of the structure produced vibrations ranging to large areas of the scaffolding surface. Higher excitation frequencies are usually less propagated at the scaffolding but still may produce some discomfort to the structure users in the vicinity of the excitation force location. Scaffolding is equipment usually used at construction sites. A scaffolding structure is lightweight and made of elements used many times. The characteristics of scaffolding make it susceptible to dynamic actions present at the structure or occurring nearby. A scaffolding structure of medium size was subjected to analysis in this paper. The structure FEM model was loaded with single force harmonic excitation with various frequencies ranging from 1 Hz to 12 Hz applied in one of many selected points on the scaffolding façade. In the first step, natural frequencies and mode shapes of the analyzed structure were calculated. Then the full dynamic analysis was carried out to obtain maximum displacements of selected control points. The relation of excitation force frequency and location to the amplitudes of generated displacement was observed. It was found that low excitation frequencies close to the natural frequencies of the structure produced vibrations ranging to large areas of the scaffolding surface. Higher excitation frequencies are usually less propagated at the scaffolding but still may produce some discomfort to the structure users in the vicinity of the excitation force location.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 1; art. no. e144577
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibro-acoustic analysis of laminated double glazing using the force identification method
Autorzy:
Ben Jdidia, M
Akrout, A
Tounsi, D
Fakhfakh, T.
Haddar, M.
Powiązania:
https://bibliotekanauki.pl/articles/949211.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
fluid-structure interaction
thin-film laminated plate
ICA
excitation force
Kurtosis
Opis:
This paper presents a procedure for identifying wave forms and excitation frequencies of some forces applied on a given complex fluid-structure coupled system by using only its vibro-acoustic response. The considered concept is called the Independent Component Analysis (ICA) which is based on the Blind Source Separation (BSS). In this work, the ICA method is exploited in order to determine the excitation force applied to a thin-film laminated double glazing system enclosing a thin fluid cavity and limited by an elastic joint. The dynamic response of the studied fluid-structure coupled system is determined by finite element discretization and minimization of the homogenized energy functional of the coupled problem. This response will serve as the input for the ICA algorithm in order to extract the applied excitation.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 895-904
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and luminescent properties of KBr-TlBr systems
Autorzy:
Bobkova, I.
Kompaniets, T.
Powiązania:
https://bibliotekanauki.pl/articles/173475.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
KBr:Tl
luminescence spectra
excitation spectra
low-dimensional KBr-TlBr system
Opis:
Luminescence and excitation spectra of the systems on the basis of the nanoporous glass impregnated with KBr-TlBr and TlBr solutions as well as KBr single crystals surface-doped with thallium were studied in visible and ultraviolet regions at T = 77 K. It was shown that each of the studied systems has its peculiar optical properties, which differ from those of the corresponding macroscopic single crystals. The results are discussed taking into account the physicochemical features of the thallium insertion in the preparation of samples from solutions.
Źródło:
Optica Applicata; 2018, 48, 2; 285-296
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamiczne oddziaływanie układów koło – szyna i pojazd szynowy – tor, z uwzględnieniem zaawansowanych modeli tarcia
Dynamic wheel-rail and train-track interactions including advanced dry friction models
Autorzy:
Bogacz, R.
Powiązania:
https://bibliotekanauki.pl/articles/248443.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
wheelset-track interaction
sharp curves
self-excitation
oddziaływanie zestaw kołowy-tor
łuk toru
drgania samowzbudne
Opis:
Artykuł poświęcony został zjawiskom samowzbudności drgań układu zestaw kołowy-tor, powstających w wyniku oddziaływania pojazdu szynowego z torem w przypadku zwiększonego poślizgu w układzie koło-szyna (niedobór/nadmiar przechyłki, przyspieszanie, hamowanie itp.). Podano podstawowe elementy modelu tarcia wrażliwego na historię procesu tarcia, a w szczególności prędkość poślizgu, czas styku, znak przyspieszenia i prędkość narastania siły tarcia. Podano przykładowe wyniki analizy numerycznej.
The paper is devoted to phenomena of friction induced self-excited vibration of mechanical systems modelling wheel-rail and train-track interactions. The objective of these investigations is to formulate a dry friction model that describes the case of stick-slip vibration, as well as quasi-periodic vibration of friction pair mentioned above. The paper studies the influence of relative velocity of motion, acceleration sign, time of sticking, force rate and additional excitation. Some results of computer simulations of self-excited vibration and its stability are presented.
Źródło:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2016, 2(109); 21-32
1231-9171
Pojawia się w:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zagadnienia drgań samowzbudnych i wzbudzanych kinematycznie w kolejnictwie
Problem of self-excitation and kinematic excitation in rail engineering
Autorzy:
Bogacz, R.
Powiązania:
https://bibliotekanauki.pl/articles/248982.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
dynamika toru
korugacje
drgania samowzbudne
track dynamics
self-excitation
Opis:
Praca zawiera omówienie wybranych zagadnień dynamicznych związanych z samo-wzbudnością i kinematycznym wymuszeniem toru. Wskazano zjawiska, które mogą być przyczyną dużych obciążeń toru i jego degradacji oraz zagrożenia wypadkami spowodowanymi zmęczeniem materiału osi zestawów kołowych. Podano możliwe przyczyny powstawania i rozwoju korugacji. Zasygnalizowano alternatywne przyczyny wężykowania pojazdów szynowych. Podano przykłady badań doświadczalnych wskazujących na występowanie obciążeń dynamicznych znacznie przekraczających obciążenia statyczne.
The paper contains description of certain dynamical problems connected with the self-excitation and kinematic excitation of railway track. Some phenomena, which may create high loads, track degradation and fatigue of wheel set axles have been defined. An alternative approach to rail vehicle hunting have been proposed. Some examples of experimental investigations, which pointed out that the dynamical load acting on the track can be much higher than the static load have been given.
Źródło:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2015, 2(106); 17-30
1231-9171
Pojawia się w:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza pracy maszyny elektrycznej z magnesami trwałymi o regulowanym wzbudzeniu
Analysis of the Electrical Machine with Permanent Magnets and Regulated Excitation
Autorzy:
Bonisławski, M.
Pałka, R.
Paplicki, P.
Wardach, M.
Powiązania:
https://bibliotekanauki.pl/articles/1368691.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
maszyny elektryczne
PMSM
regulacja wzbudzenia
ECPSM
electrical machines
excitation regulation
Opis:
The article presents some results of research on a prototype model of Electric Controlled Permanent Magnet Excited Synchronous Machine (ECPSM). In this construction, the additional coil allows to adjust the flux of permanent magnets, adding a degree of freedom to control the machine. In this way, more torque at low motor speeds and increased max speed can be achieved, without the conventional (lowering the efficiency of the drive system) techniques of weakning the field. Control algorithms of vector field orientation (FOC) were used in the research, which was implemented in a microprocessor controller. Modern DSP microcontroller was used for this purpose, which is a part of a dedicated test bench, allowing a comprehensive analysis of the machine.
W artykule przedstawiono wyniki badań nad modelem prototypowym maszyny elektrycznej z magnesami trwałymi o regulowanym wzbudzeniu (ECPSM). W przedstawionej konstrukcji, dodatkowa cewka umożliwia regulację strumienia magnesów trwałych, dodając pewien stopień swobody sterowania maszyny. Dzięki temu, osiągnąć można większy moment obrotowy w zakresie niskich prędkości obrotowych oraz zwiększenie prędkości maksymalnej, bez użycia tradycyjnych (obniżających sprawność układu napędowego) technik osłabiania pola. W badaniach wykorzystano algorytmy sterowania z wektorową orientację pola (FOC - Field Oriented Control), które zaimplementowano w autorskim sterowniku mikroprocesorowym. Wykorzystano w tym celu nowoczesny mikrokontroler DSP, będący częścią dedykowanego stanowiska pomiarowego, umożliwiającego kompleksową analizę pracy maszyny.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2013, 4, 100/2; 155-160
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 126

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