You're using an outdated browser. Please upgrade to a modern browser for the best experience.
Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort:
Most Viewed Latest Alphabetical (A-Z) Alphabetical (Z-A)
Filter:
All Topic Review Biography Peer Reviewed Entry Video Entry
Topic Review
Functionalities of Solid State Transformers
The ongoing energy transition has changed the architecture of electricity networks in ways that conventional power transformers are not able to cope with the new required functionalities. The solid state transformer (SST), which comprises state-of-the-art power electronics with galvanic isolation to interconnect two separate alternating current (AC) or direct current (DC) power grids, is considered to be the dominant solution. 
  • 814
  • 19 Apr 2023
Topic Review
Charging Electric Vehicles Today and in the Future
It is expected that more vehicles will be electrified in the coming years. This will require reliable access to charging infrastructure in society, and the charging will include data exchange between different actors. This suggests a variety of future charging strategies, charging patterns, system types, and charging infrastructures to match the specific vehicle- and user requirements. The electricity available for EV charging locally can be generated to the grid from fossil fuels, nuclear power, or renewable energy sources (RES), such as hydropower. 
  • 813
  • 18 Aug 2022
Topic Review
Solar Hybrid Photovoltaic Thermal System
A Hybrid Photovoltaic Thermal (PVT) system is one of the most emerging and energy-efficient technologies in the area of solar energy engineering. Several cell technologies with spectrum analysis are discussed to understand the application’s ability and energy efficiency.
  • 810
  • 07 Feb 2024
Topic Review
Wide Bandgap Semiconductor Materials in Power Electronics
Silicon (Si)-based semiconductor devices have long dominated the power electronics industry and are used in almost every application involving power conversion. However, for many applications, power device requirements such as higher blocking voltage capability, higher switching frequencies, lower switching losses, higher temperature withstand, higher power density in power converters, and enhanced efficiency and reliability have reached a stage where the present Si-based power devices cannot cope with the growing demand and would usually require large, costly cooling systems and output filters to meet the requirements of the application. Wide bandgap (WBG) power semiconductor materials such as silicon carbide (SiC), gallium nitride (GaN), and diamond (Dia) have recently emerged in the commercial market, with superior material properties that promise substantial performance improvements and are expected to gradually replace the traditional Si-based devices in various power electronics applications. 
  • 810
  • 25 Oct 2023
Topic Review
Rotational Magnetic Properties of Amorphous Metal Materials
Amorphous metal (AM), specifically amorphous ferromagnetic metal, is considered as a satisfactory magnetic material for exploring electromagnetic devices with high-efficiency and high-power density, such as electrical machines and transformers, benefits from its various advantages, such as reasonably low power loss and very high permeability in medium to high frequency. However, the characteristics of these materials have not been investigated comprehensively, which limits its application prospects to good-performance electrical machines that have the magnetic flux density with generally rotational and non-sinusoidal features. The appropriate characterization of AMs under different magnetizations is among the fundamentals for utilizing these materials in electrical machines.
  • 808
  • 24 Oct 2022
Topic Review
Congestion Alleviation in the Deregulated Power System
Economic and geographical constraints led to reforms and deregulations in the power system to utilize resources optimally within the existing framework. The major hindrance in the efficient operation of the deregulated power system (DPS) is congestion, which is the result of the participation of private players under deregulation policies.
  • 806
  • 16 Feb 2023
Topic Review
ML-Based Classification Algorithms for SCIM
In industry, electric motors such as the squirrel cage induction motor (SCIM) generate motive power and are particularly popular due to their low acquisition cost, strength, and robustness. Along with these benefits, they have minimal maintenance costs and can run for extended periods before requiring repair and/or maintenance. Early fault detection in SCIMs, especially at low-load conditions, further helps minimize maintenance costs and mitigate abrupt equipment failure when loading is increased. 
  • 805
  • 28 Jun 2022
Topic Review
Renewable Energy Resources Technologies and Life Cycle Assessment
Researchers focuse on RER-based electrical power plants as a base to achieve two different sustainable development goals, SDG7 (obtaining reasonably priced clean energy) and SDG13 (reducing climate change). These goals in turn would support other environmental, social, and economic SDG. The study is constructed based on two pillars which are technological developments and life cycle assessment (LCA) for wind, solar, biomass, and geothermal power plants. Many other essential topics are presented in brief such as fossil fuels’ environmental impact, economic sustainability linkage to RER, the current contribution of RER in energy consumption worldwide and barriers and environmental effects of RER under consideration.
  • 805
  • 03 Apr 2023
Topic Review
Fog-Based IoT Platform Performance Modeling and Optimization
A fog-based IoT platform model involving three layers, i.e., IoT devices, fog nodes, and the cloud, was proposed using an open Jackson network with feedback. The system performance was analyzed for individual subsystems, and the overall system was based on different input parameters. Interesting performance metrics were derived from analytical results. A resource optimization problem was developed and solved to determine the optimal service rates at individual fog nodes under some constraint conditions.
  • 804
  • 19 Jun 2023
Topic Review
Integration of RESs and EVs in Power Systems
Electric vehicles (EVs) represent a promising green technology for mitigating environmental impacts. However, their widespread adoption has significant implications for management, monitoring, and control of power systems. The integration of renewable energy sources (RESs), commonly referred to as green energy sources or alternative energy sources, into the network infrastructure is a sustainable and effective approach to addressing these matters.
  • 802
  • 30 May 2023
Topic Review
Electric Vehicle Battery Cells
Nowadays, batteries for electric vehicles are expected to have a high energy density, allow fast charging and maintain long cycle life, while providing affordable traction, and complying with stringent safety and environmental standards. Extensive research on novel materials at cell level is hence needed for the continuous improvement of the batteries coupled towards achieving these requirements. 
  • 796
  • 26 Jul 2021
Topic Review
Modern MultiPort Converter Technologies
The integration of renewable energy sources (RES) as distributed generation units to the power grid has been accelerated by the rising demand for energy and the growing concern over the environmental effects of conventional sources. At the same time, modern electric vehicles (EV) are demonstrating a promising ability to decrease the consumption of fossil fuels. The issues related to a combination of various renewable energy sources to fulfil the load requirements can be solved by the application of multi-input–output architecture that is properly designed. In order to increase the driving range of EVs, several energy sources, including ultracapacitors and fuel cells, should be connected and operate in combination with a battery storage system. To manage these energy sources with various voltage-current characteristics, the same concept can be applied.
  • 796
  • 12 Sep 2023
Topic Review
Industrial Microgrids Based on Renewable Energy
Electric microgrids based mainly on renewable energies have seen a big expansion due to the great advantages they present against fossil fuels. Nowadays different governments are becoming aware of the use of environmentally friendly energies, so progressive investment has been granted to the consumers in Spain. It should be noted that in applications using renewable energies, the use of energy storage systems (ESS) has been implemented with the aim of improving the reliability of the system to avoid the intermittent nature of energy generation. Most of these ESS use lithium-ion batteries and sodium–sulfur batteries having high power and energy densities and high efficiency. Many industrial activities are gradually giving an opportunity to this type of MG system of renewable energy (RE) with EES. 
  • 794
  • 11 Apr 2022
Topic Review
Segmental Switched Reluctance Motor
Due to the high robustness and control flexibility of switched reluctance motors (SRMs), segmented structures have been widely studied to expand its applications in aerospace and other industrial fields.
  • 794
  • 04 Sep 2023
Topic Review
Aerodynamic Power Extraction of Large-Scale Wind Turbine Systems
As the impacts of environmental change become more severe, reliable and sustainable power generation and efficient aerodynamic power collection of onshore and offshore wind turbine systems present some of the associated key issues to address. 
  • 793
  • 25 Nov 2022
Topic Review
Nationale Plattform Elektromobilität
The German National Platform for Electric Mobility ("Nationale Plattform Elektromobilität") is an advisory council of the German Federal Government for electric vehicle introduction. It consists of the top representatives of industry (10 Members), politics (6), science (3), associations (3) and unions (1). It was officially established on 3 May 2010 during a meeting with German chancellor Angela Merkel. Its task is to push on the National Development Plan for Electric Mobility ("Nationaler Entwicklungsplan Elektromobilität"). The goal for 2020 of the NPE is to develop Germany to the leading supplier and lead market for electric mobility and to gain an employment effect of 30,000 additional jobs.
  • 792
  • 26 Oct 2022
Topic Review
DC-DC Converter Topologies for LEV Charging
Design and analysis of power electronic converters is an integral aspect of light electric vehicle (LEV) chargers. In this respect, researchers have proposed novel DC-DC converter topologies with optimized active and passive component count. Isolated DC-DC converters are preferred for chargers with higher power ratings. They provide galvanic isolation between the input and output stage by using a high frequency transformer.
  • 791
  • 24 May 2023
Topic Review
Electrification of Transportation in Islands
Electric vehicles (EVs) represent an important socio-economic development opportunity for islands and remote locations because they can lead to reduced fuel imports, electricity storage, grid services, and environmental and health benefits. This entry presents an overview of opportunities, challenges, and examples of EVs in islanded power systems, and is meant to provide background to researchers, utilities, energy offices, and other stakeholders interested in the impacts of electrification of transportation. The impact of uncontrolled EV charging on the electric grid operation is discussed, as well as several mitigation strategies.
  • 789
  • 16 Aug 2021
Topic Review
Hyperpolarized 13C Magnetic Resonance
Hyperpolarized 13C magnetic resonance (MR) is a promising technique for the noninvasive assessment of the regional cardiac metabolism since it permits heart physiology studies in pig and mouse models. 
  • 788
  • 19 Feb 2021
Topic Review
All-Dielectric Metasurface for Sensing Microcystin-LR
Microcystin is a kind of biotoxin widely found in freshwater bodies across the world. It is one of the indicators of water eutrophication which makes water consumption harmful to human beings. Microcystin can inhibit the production of protein phosphatase in cells and exposure to microcystin can severely damage organs, including liver, intestines, lungs, and kidneys. There are many variants of microcystin, such as MC-LR, MC-RR, and MC-YR (L, R, and Y stand for leucine, arginine, and tyrosine, respectively). Among them, MC-LR is the most common and the most toxic variant. 
  • 788
  • 21 Jun 2021
  • Page
  • of
  • 50
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of Engineering
Encyclopedia of Social Sciences
Encyclopedia of COVID-19
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Academic Video Service
Feedback
<<2020-2029
201920202021202220232024202520262027202820292030
<<2020-2029
201920202021202220232024202520262027202820292030