Results 11 to 20 of about 69,012 (291)

Artificial ecosystem‐based optimiser to electrically characterise PV generating systems under various operating conditions reinforced by experimental validations

IET Renewable Power Generation, 2021
Efficient modelling of photovoltaic (PV) generating units' characteristics to investigate their steady‐state and dynamic impacts on the performances of power systems and electric drives is essential.
Mahmoud M. Elkholy, Mohamed A. El‐Hameed, Attia A. El‐Fergany   +2 more
doaj   +1 more source

Fluid flow measurement in rotor ventilation ducts

The Journal of Engineering, 2019
Engineers are constantly developing different ways to cool electrical machines more efficiently. Ventilation ducts/channels are common in the stators of large electrical machines.
Christopher Micallef, Joseph Degabriele, Darren Camilleri   +2 more
doaj   +1 more source

Thermal Management in Electrical Machines

Energies, 2022
Apart from protecting electrical machines from temperature related failures, thermal management of electrical machines is employed in the design phase of electrical machines to achieve higher efficiencies and higher power densities [...]
Christopher Micallef
doaj   +1 more source

Automated Settings of Overcurrent Relays Considering Transformer Phase Shift and Distributed Generators Using Gorilla Troops Optimizer

Mathematics, 2023
The relative protective devices are cascaded in a proper sequence with a proper min/max coordination time margin (CTM) to minimize the outage area of the network in case of fault condition. This manuscript addresses a new methodology based on the gorilla
Abdelmonem Draz, Mahmoud M. Elkholy, Attia A. El-Fergany   +2 more
doaj   +1 more source

An Advanced Control Performance of a Sophisticated Stand-Alone Wind-Driven DFIG System

International Transactions on Electrical Energy Systems, 2023
To supply resident loads far from the grid, a stand-alone wind system with a small-scale wind turbine and battery storage can be used. The traditional configuration of the system has a permanent-magnet synchronous generator (PMSG).
Omar E. M. Youssef, Mohamed G. Hussien, Abd El-Wahab Hassan   +2 more
doaj   +1 more source

Investigation the dielectric strength and mechanical features of nitrile butadiene rubber enhanced by different nanoparticles

Egyptian Journal of Petroleum, 2023
To investigate the dielectric strength and mechanical features of modified nitrile butadiene rubber (NBR), titanium dioxide (TiO2) and magnesium oxide (MgO) nanoparticles have been used.
El-Sayed M. El-Refaie, L.S. Nasrat, M. Kh. Mohamed, I.A. Ibrahim   +3 more
doaj   +1 more source

Semi-physical demagnetization model for the temperature dependency of permanent magnets in electrical machines

AIP Advances, 2023
Losses during the operation of electrical machines heat up permanent magnets which in turn changes their demagnetization behavior. An elevation of permanent magnet’s temperature usually correlates to a decreasing remanence and coercivity.
Alexander Kern, Nora Leuning, Kay Hameyer   +2 more
doaj   +1 more source

Automatic speed controller of a DC motor using Arduino and Variable Frequency Drive techniques [PDF]

E3S Web of Conferences
The programmed speed control of a DC engine is basic in numerous mechanical applications, where exact control of engine speed is required. In this paper, we propose a arrangement for programmed speed control of a DC engine utilizing an Arduino ...
Ibrahim Mayyadah Sahib, Kaittan Ali Sachit, Abdullah Ali Najim, Ali Mohammed Hasan   +3 more
doaj   +1 more source

An economic study concerning the cost reduction of the covered transmission conductors based on different optimization techniques

Results in Engineering, 2021
This research provides an innovative analysis for the economics of the medium voltage transmission lines that used Covered Conductors (CCs). This research concentrates on the effect of numerical methodologies based on Genetic Algorithm (GA), Grey Wolf ...
M. Talaat, Zeinab El-Shaarawy, M. Tayseer, A. El-Zein   +3 more
doaj   +1 more source

Transient System Model for the Analysis of Structural Dynamic Interactions of Electric Drivetrains

Energies, 2021
In electric drivetrains, the traction machines are often coupled to a gear transmission. For the noise and vibration analysis of such systems, linearised system models in the frequency domain are commonly used.
Marius Franck, Jan Philipp Rickwärtz, Daniel Butterweck, Martin Nell, Kay Hameyer   +4 more
doaj   +1 more source