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Wyświetlanie 1-15 z 33
Tytuł:
“Interactive Power Devices for Efficiency in Automotive with Increased Reliability and Safety” – the European Project Concerning the Main Automotive and Transport Application Domains
Autorzy:
Kadlec, J.
Kuchta, R.
Novotny, R.
Hajduga, A.
Sekrecki, M.
Roszczyk, P.
Dybowski, J.
Kalbarczyk, J.
Zieliński, W.
Bańbura, P.
Burliński, R.
Powiązania:
https://bibliotekanauki.pl/articles/263013.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
electric vehicle
NAND flash memory
reliability
EV powertrain
electric drive efficiency
pojazd elektryczny
pamięć flash NAND
niezawodność
napęd
napęd elektryczny
efektywność
Opis:
The overall objective of the IDEAS project is to develop advanced packaging for power supply components and new generation memory systems applicable to Electric and ICE propelled vehicles, with paying attention to considering also the aspects that have not been addressed yet in the running ENIAC and ARTEMIS Automotive projects. A major challenge related to electronic devices in the automotive applications is the reliability of power supply systems which must be capable to assure the functionality of subsystems in all operating conditions, inclusive of ageing. The control systems, which rely on multicore microcontrollers and complex software architectures, require increasingly stringent constraints from the memory devices which need to be designed for very high bandwidth, speed and reliability. In the following thesis, a few aspects of the IDEAS project will be presented: a review of important factors that affect the reliability and life-cycle endurance of NAND flash memories, multispeed gear application in electric drives and its influence on the energy efficiency. The problem of electromagnetic compatibility of electronic devices will also be dealt with in the paper
Źródło:
Archiwum Motoryzacji; 2015, 69, 3; 31-64
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected characteristics of the electric propulsion system of aircraft as found out from the ground-based laboratory tests
Autorzy:
Jakielaszek, Z.
Nowakowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/242946.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
electric motor
physical parameters of the air
efficiency and power of electric motor
Opis:
The paper is a discussion on ground-based laboratory tests of the aircraft’s electric propulsion system. The tests were intended to find relationships between environmental conditions and characteristics of the aircraft electric motor. The object under examination was a brushless DC motor AXI 2820/14 of 360 W power. Presented and discussed is the AFIT-made test bench that enables suitable, pre-planned experiments to be carried out. Discussed are also procedures of taking measurements of electric motor characteristics, followed with discussion of results. Presented selected issues of parametric description of gained results. With measurements as the basis, the relationships, first, between the electric motor’s efficiency and temperature, and second, between both the applied power and the power output (effective power) and the ambient temperature have been found. The most important findings of the testing work are, first, that the pressure does not affect the characteristics of the electric motor’s performance and second, determination of how temperature affects these characteristics. The results gained have formed the basis for the most vital flight parameters of electrically driven aircraft to be found, including the energy consumption essential for the flight range and endurance. All these findings give grounds for standardization calculations that consist in recalculation of characteristics determined in the course of aircraft flight-testing. Because of their representativeness, they also prove good illustrative examples to demonstrate properties of aircraft’s electric propulsion system.
Źródło:
Journal of KONES; 2014, 21, 4; 203-210
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of the regenerative braking process efficiency in electric vehicles
Autorzy:
Kropiwnicki, Jacek
Gawłas, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2204620.pdf
Data publikacji:
2023
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
electric vehicle
urban conditions
regenerative braking
energetic efficiency
Opis:
In electric and hybrid vehicles, it is possible to recover energy from the braking process and reuse it to drive the vehicle using the batteries installed on-board. In the conditions of city traffic, the energy dissipated in the braking process constitutes a very large share of the total resistance to vehicle motion. Efficient use of the energy from the braking process enables a significant reduction of fuel and electricity consumption for hybrid and electric vehicles, respectively. This document presents an original method used to estimate the efficiency of the regenerative braking process for real traffic conditions. In the method, the potential amount of energy available in the braking process was determined on the basis of recorded real traffic conditions of the analysed vehicle. The balance of energy entering and leaving the battery was determined using the on-board electric energy flow recorder. Based on the adopted model of the drive system, the efficiency of the regenerative braking process was determined. The paper presents the results of road tests of three electric vehicles, operated in the same traffic conditions, for whom the regenerative braking efficiency was determined in accordance with the proposed model. During the identi-fication of the operating conditions of the vehicles, a global positioning system (GPS) measuring system supported by the original method of phenomenological signal correction was used to reduce the error of the measured vehicle’s altitude. In the paper, the efficiency of the re-cuperation process was defined as the ratio of the accumulated energy to the energy available from the braking process and determined for the registered route of the tested vehicle. The obtained results allowed to determine the efficiency of the recuperation process for real traffic conditions. They show that the recuperation system efficiency achieves relatively low values for vehicle No. 1, just 21%, while the highest value was achieved for vehicle No. 3, 77%. Distribution of the results can be directly related to the power of electric motors and battery capacities of the analysed vehicles.
Źródło:
Acta Mechanica et Automatica; 2023, 17, 2; 303--310
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of battery cell configuration to powered wheelchair drive efficiency
Autorzy:
Vitols, Kristaps
Podgornovs, Andrejs
Powiązania:
https://bibliotekanauki.pl/articles/140642.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
batteries
efficiency
electric vehicles
motor drives
personal mobility
Opis:
Cells of a prototype powered wheelchair can be designed in various connections to provide different supply voltages which has impact on the efficiency of other wheelchair drive elements. The impact of cell configuration and resulting battery voltage on overall efficiency of power elements have been studied to determine the optimal configuration and voltage of the pack. A brief description of a battery energy storage system was given, and main requirements and variables were introduced to reveal the flexibility of the battery design. The efficiency versus supply voltage plots of a drive converter and battery charger were presented and discussed to find the optimal battery voltage. The motor design was analyzed from the fill factor perspective. The calculated efficiency parameters of all drive power elements were used to discuss and select an optimal battery cell configuration.
Źródło:
Archives of Electrical Engineering; 2020, 69, 1; 203-213
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light two-wheeled electric vehicle energy balance investigation using chassis dynamometer
Autorzy:
Racewicz, Szymon
Kazimierczuk, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/1837923.pdf
Data publikacji:
2020
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
electric vehicle
energy balance
chassis dynamometer
drive system efficiency
Opis:
The article presents the methodology for light two-wheeled electric vehicle energy balance investigation using MAHA LPS 3000 chassis dynamometer. For this purpose, the laboratory tests, as well as the road tests, have been performed on the self-constructed light two-wheeled electric vehicle equipped with the 3 kW BLDC motor and the 100.8 V battery pack. The road test data have been used to set up the dynamometer parameters in order to simulate the real road drive taking into account, among others, the rolling resistances and the air drag coefficient. The overall energy consumption for the laboratory tests and the road conditions’ tests have been then compared for different vehicle speeds. In addition, based on the power and the torque characteristics measured on the MAHA chassis dynamometer, the efficiency of the vehicle electric drive system and the efficiency of the battery charging process have been calculated.
Źródło:
Acta Mechanica et Automatica; 2020, 14, 4; 175-179
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of polarization molecules reagents of the burning reaction on the efficiency of equipment for thermogeneration
Autorzy:
Kovalyshyn, B.
Powiązania:
https://bibliotekanauki.pl/articles/411199.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
energy efficiency
burning
electric field
high voltage
activation
polarization
Opis:
The aspects of physical and chemical nature of oxidizing-reduction processes of burning were investigated. The communication of efficiency of fuel equipments with polarizing and activating of molecules-reagents was exposed. Application of molecules electro-activation for optimization of the chemical reactions at burning passed at incineration of gaseous hydrocarbon fuels in the oxidizing air environment was grounded experimentally.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2013, 2, 2; 31-35
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the energy efficiency of lighting inside sports facilities on the basis of the PN-EN 15193 norm
Autorzy:
Typańska, D.
Powiązania:
https://bibliotekanauki.pl/articles/97477.pdf
Data publikacji:
2012
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
electric lighting
sports facility lighting
efficiency lighting
PN-EN 15193
Opis:
The article presents the findings of energy efficiency examination of the lighting used inside the swimming pool hall of the existing water park facility based on the PN-EN 15193 norm. It describes the basic factors on which the analysis of the lighting energy efficiency is based and provides specific calculation.
Źródło:
Computer Applications in Electrical Engineering; 2012, 10; 386-393
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric energy access in Bangladesh
Autorzy:
Taheruzzaman, M.
Janik, P.
Powiązania:
https://bibliotekanauki.pl/articles/136227.pdf
Data publikacji:
2016
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
energy profile
energy efficiency
electric power sector
renewable energy
solar system
Opis:
This paper represents the overall electrical energy profile and access in Bangladesh. In the recent past, Bangladesh has been experiencing the shortage of electricity, and about 42% of the population no access to the electricity. The electricity consumption has rapidly increased over last decade. The demand and consumption will intensify in the remote future as overall development and future growth. To set “vision 2021” of Bangladesh; the government of Bangladesh has devoted to ensuring access to affordable and reliable electricity for all by 2021. In the modern time, energy is the vital ingredient for socioeconomic growth in the developing country i.e., alleviating poverty. Along with electricity access in Bangladesh strived to become the middle-income country by 2021. Bangladesh has experienced that energy consumption inclines to increase rapidly when per capita income reaches between US$ 1,000 and US$ 10,000, and a country’s growth momentum through reliable energy supply and consistent energy supply ensured by the sustainable energy. As increasing population in Bangladesh, the electric energy generation is an important dispute through the sustainable way.
Źródło:
Transactions on Environment and Electrical Engineering; 2016, 1, 2; 6-17
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The methodology used in defining air pollution from ships mooring in ports
Autorzy:
Borkowski, T.
Nicewicz, G.
Tarnapowicz, D.
Powiązania:
https://bibliotekanauki.pl/articles/359930.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
generator efficiency
electric power load
marine auxiliary engines
exhaust gas emission
Opis:
Diesel main and auxiliary engines are main sources of air pollution from ships mooring in ports. Auxiliary engines are used in electrical grids that are essential for the operation of a ship. In many reports and academic publications the estimated amount of exhaust emission, calculated by means of the assumed marine auxiliary engine load factor, is used in order to assess the operation of marine power plants with respect to environmental protection. The factors influencing the marine auxiliary engine load factors are: the auxiliary engine excess power versus generator power and generator efficiency. However, these factors are rarely taken into account. In the present paper the importance of engine excess power and the efficiency of marine generating sets for the evaluation of real auxiliary engines load and exhaust emission related to it is discussed. Besides, the results of in-service experience of exhaust emission from marine auxiliary engines on the example of Ro-Pax vessel are presented.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 2; 17-22
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transformer performance enhancement by optimized charging strategy for electric vehicles
Autorzy:
Venkataswamy, R.
Uma Rao, K.
Meena, P.
Powiązania:
https://bibliotekanauki.pl/articles/2042802.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
charging stations
electric vehicle
e-mobility
optimization
transformer efficiency
transformer regulation
Opis:
Transformer efficiency and regulation, are to be maintained at maximum and minimum respectively by optimal loading, control, and compensation. Charging of electric vehicles at random charging stations will result in uncertain loading on the distribution transformer. The efficiency reduces and regulation increases as a consequence of this loading. In this work, a novel optimization strategy is proposed to map electric vehicles to a charging station, that is optimal with respect to the physical distance, traveling time, charging cost, the effect on transformer efficiency and regulation. Consumer and utility factors are considered for mapping electric vehicles to charging stations. An Internet of Things platform is used to fetch the dynamic location of electric vehicles. The dynamic locations are fed to a binary optimization problem to find an optimal routing table that maps electric vehicles to a charging station. A comparative study is carried out, with and without optimization, to validate the proposed methodology.
Źródło:
Archives of Electrical Engineering; 2022, 71, 1; 37-56
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study on electric bicycle energy efficiency
Исследование энергоэффективности электрического велосипеда
Autorzy:
Evtimov, I.
Ivanov, R.
Staneva, G.
Kadikyanov, G.
Powiązania:
https://bibliotekanauki.pl/articles/374709.pdf
Data publikacji:
2015
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
electric bicycle
energy efficiency
energy consumption
rower elektryczny
efektywność energetyczna
zużycie energii
Opis:
The paper presents a construction of an experimental electric bicycle for evaluation of the energy efficiency. The bicycle is equipped with onboard computer which can store the information about motion and energy consumption. The result concerning power, energy consumption, recharging during brake process, etc. are given. Energy consumption for 3 typical city routes is studied.
В статье представлена конструкция экспериментального электрического велосипеда для оценки энергетической эффективности. Велосипед оснащен бортовым компьютером, который может хранить информацию о движении и потреблении энергии. Приведены результаты по вопросам мощности, потребления энергии, подзарядки во время процесса торможения и т.д. Изучено потребление энергии для 3 типичных городских маршрутов.
Źródło:
Transport Problems; 2015, 10, 3; 131-140
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowoczesna kompensacja mocy biernej i wyższych harmonicznych z wykorzystaniem kompensatorów dynamicznych STATCOM i EFA
Modern reactive power and higher harmonic compensation through the utilisaction of STATCOM and EFA dynamic compensators
Autorzy:
Bałkowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/396895.pdf
Data publikacji:
2010
Wydawca:
ENERGA
Tematy:
energia elektryczna
wykorzystanie energii
efektywność energetyczna
electrical energy
utilizing electric energy
energetic efficiency
Opis:
This article discusses the issue of reactive power and higher harmonic compensation by means of classic systems based on capacitor batteries and modern power electronics dynamic systems of the STATCOM and EFA type. The author, through the process of evaluating advantages and disadvantages, is strongly in favour of the modern dynamic solutions and underlines their benefits and usability in the attempts aimed at improving the quality and efficiency of electric energy usage.
Źródło:
Acta Energetica; 2010, 3; 5-11
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of magnetic field on the efficiency of a silicon solar cell under an intense light concentration
Autorzy:
Zoungrana, M.
Zerbo, I.
Soro, B.
Savadogo, M.
Tiedrebeogo, S.
Bathiebo, D. J.
Powiązania:
https://bibliotekanauki.pl/articles/102700.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
conversion efficiency
electric power
fill factor
light concentration
magnetic field
optimal charge load
Opis:
This work put in evidence, magnetic field effect the electrical parameters of a silicon solar cell illuminated by an intense light concentration: external load electric power, conversion efficiency, fill factor, external optimal charge load. Due to the high photogeneration of a carrier in intense light illumination mode, in addition of magnetic field, we took into account the carrier gradient electric field in the base of the solar cell. Taking into account this electric field and the applied magnetic field in our model led to new analytical expressions of the continuity equation, the photocurrent and the photovoltage. In this work, we used the electric power curves versus junction dynamic velocity (Sj) to determine, according to magnetic field, the maximum electric power Pelmax and we calculate the solar cell conversion efficiency (η). We also used the J-V characteristics to determine the solar cell short circuit density current (Jcc) and the open circuit voltage (Vco) under magnetic field and we calculate the fill factor (FF). Finally, we used simultaneously the J-V characteristics and equipower curves to determine the optimal external load resistance. The results of this study have showed that the maximum electric power and the conversion efficiency are higher than those of monofacial and bifacial silicon solar cells illuminated by conventional light but they decreased with the increase of magnetic field.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 2; 133-138
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Issues of exploitation of induction motors in the course of underground mining operations
Problemy eksploatacji silników indukcyjnych w warunkach górnictwa podziemnego
Autorzy:
Gumula, S.
Hudy, W.
Piaskowska-Silarska, M.
Pytel, K.
Powiązania:
https://bibliotekanauki.pl/articles/219589.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
maszyny górnicze
silniki elektryczne
sterowanie
wskaźniki efektywności
mining machinery
electric motors
control
efficiency indicators
Opis:
Mining industry is one of the most important customers of electric motors. The most commonly used in the contemporary mining industry is alternating current machines used for processing electrical energy into mechanical energy. The operating problems and the influence of qualitative interference acting on the inputs of individual regulators to field-oriented system in the course of underground mining operations has been presented in the publication. The object of controlling the speed is a slip-ring induction motor. Settings of regulators were calculated using an evolutionary algorithm. Examination of system dynamics was performed by a computer with the use of the MATLAB / Simulink software. According to analyzes, large distortion of input signals of regulators adversely affects the rotational speed that pursued by the control system, which may cause a large vibration of the whole system and, consequently, its much faster destruction. Designed system is characterized by a significantly better resistance to interference. The system is stable with the properly selected settings of regulators, which is particularly important during the operation of machinery used in underground mining.
Branża górnicza jest jednym z ważniejszych odbiorców silników elektrycznych. Najpowszechniej stosowane w branży górniczej są obecnie maszyny prądu przemiennego służące do przetwarzania energii elektrycznej w energię mechaniczną. W artykule przedstawiono problemy eksploatacji i wpływ jakościowy zakłóceń działających na sygnały wejściowe poszczególnych regulatorów w układzie polowo-zorientowanym w warunkach górnictwa podziemnego. Obiektem sterowania prędkością obrotową jest silnik indukcyjny pierścieniowy. Nastawy regulatorów obliczono przy zastosowaniu algorytmu ewolucyjnego. Badanie dynamiki układu przeprowadzono metodą komputerową korzystając z oprogramowania MATLAB/ Simulink. Jak wynika z analiz, duże zakłócenie sygnałów wejściowych regulatorów niekorzystnie wpływa na przebieg prędkości obrotowej realizowanej przez układ sterowania, co może spowodować wystąpienie dużych drgań całego układu, a w konsekwencji jego znacznie szybsze zużycie. Przy odpowiednio dobranych nastawach regulatorów zaprojektowany układ charakteryzuje się większą odpornością na zakłócenia i jest przy tym stabilny, co jest szczególnie istotne w trakcie eksploatacji urządzeń wykorzystywanych w górnictwie podziemnym.
Źródło:
Archives of Mining Sciences; 2017, 62, 3; 579-596
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical and experimental ground of the fuel energy efficiency improvement by an activation of the burning reaction molecules - reagents
Autorzy:
Kovalyshyn, B.
Powiązania:
https://bibliotekanauki.pl/articles/410674.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
wysokie napięcia
pole elektryczne
wydajność energetyczna
high voltage
electric field
activation
energy efficiency
redox
Opis:
In theory and experimentally a method of fuel options energy efficiency rise due to an activation of burning reaction molecules-reagents under high voltage electric field action is grounded. A variant of the technical realization of the offered method is described.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2012, 1, 1; 63-66
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
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