Results 81 to 90 of about 787,692 (200)

Self-oscillations in field emission nanowire mechanical resonators: a nanometric DC-AC conversion [PDF]

open access: yes, 2010
We report the observation of self-oscillations in a bottom-up nanoelectromechanical system (NEMS) during field emission driven by a constant applied voltage.
Ayari, Anthony   +7 more
core   +2 more sources

High-voltage (270 V) dc power-generating system for fighter aircraft [PDF]

open access: yes, 1983
The advantages of using high voltage, direct current advanced power generating systems in fighter aircraft are discussed. Weight reduction is achieved. Efficiency is increased 85 to 90 percent by eliminating the constant speed drive.
Mcginley, K. M.
core   +1 more source

Improving the Performance of Power Transmission via Ultra High Voltage Direct Current (UHVDC)

open access: yesMATEC Web of Conferences, 2018
To meet people’s increasing demand for power, the power network system is developing. And the concept, essence and an energy interactive network plan of “Smart Grid” is proposed. However, some technical issues concerned in power network system appear. It
Li Yongbei
doaj   +1 more source

Laboratory and field partial discharge measurement in HVDC power cables [PDF]

open access: yes, 2015
A range of experimental and field measurements of partial discharge (PD) activity under high voltage direct current (HVDC) conditions have been conducted with the goal of developing effective monitoring techniques for PD in HVDC cables and ancillary ...
Awodola, Joseph   +9 more
core  

Walrus optimizer-based optimal fractional order PID control for performance enhancement of offshore wind farms

open access: yesScientific Reports
Offshore wind farms (OWFs) play a crucial role in producing renewable energy in modern electrical power systems. However, to ensure that these facilities operate smoothly, they require robust control systems.
Mohamed A. M. Shaheen   +3 more
doaj   +1 more source

Converter design techniques and applications [PDF]

open access: yes
Transistorized direct current voltage converters offer a number of advantages over other types because of their small size, low weight, high efficiency, high reliability, precision accuracy and wide range of control.
Lalli, V. R.
core   +1 more source

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

open access: yesEnergies, 2017
This paper proposes the use of bridge type fault current limiters (BFCLs) as a potential solution to reduce the impact of fault disturbance on voltage source converter-based high voltage DC (VSC-HVDC) systems.
Md Shafiul Alam   +1 more
doaj   +1 more source

Legislative History of the Fair Labor Standards Act [PDF]

open access: yes, 1939
With recent advances in power electronic technology, High-Voltage Direct Current (HVDC) transmission system has become an alternative for transmitting power especially over long distances.
Forsythe, John S.
core   +1 more source

Home - About - Disclaimer - Privacy