Results 221 to 230 of about 66,581 (263)
Some of the next articles are maybe not open access.
Fluctuation of Contact Voltage During Fretting Phases
2017Due to repetitive micro-displacements, the fretting phenomenon was defined as an electrical and mechanical degradation of the electrical contact interface in telecommunications and more recently in power automotive connectors. Commonly, the electrical degradation was quantified by the increase of contact resistance deduced from the contact voltage ...
El Abdi, Rochdi +4 more
openaire +3 more sources
Determination of the parameters of voltage variation with voltage fluctuation indices
2016 17th International Conference on Harmonics and Quality of Power (ICHQP), 2016A set of parameters that describe the quality of power in power grids includes several measures of voltage variation. Among these measures are the voltage fluctuation indices, composed of magnitude, δU, and rate, ƒ, of fluctuations. This paper provides an example of the use of this measure to reconstruct the voltage changes.
Mateusz Michalski, Grzegorz Wiczynski
openaire +1 more source
10th IEEE International Conference on Nanotechnology, 2010
We investigate the influence of two traps in close proximity within one nanometer located at the semiconductor/oxide interface (positioned in the middle of the gate width and moved from the source end to the drain end of the channel) on the threshold voltage and the ON-current variation.
Nabil Ashraf +2 more
openaire +1 more source
We investigate the influence of two traps in close proximity within one nanometer located at the semiconductor/oxide interface (positioned in the middle of the gate width and moved from the source end to the drain end of the channel) on the threshold voltage and the ON-current variation.
Nabil Ashraf +2 more
openaire +1 more source
Voltage fluctuations and flicker
2001Changes in the amplitude of a voltage for a period which is longer than the period of the voltage under consideration is designated a voltage fluctuation. Such voltage fluctuations can occur once, several times, randomly or regularly. The voltage fluctuation in the form of a jump, a ramp or any quasi course is described by the value of the relative ...
openaire +1 more source
The response of rectifiers to fluctuation voltages
Institution of Electrical Engineers - Proceedings of the Wireless Section of the Institution, 1937This paper is concerned with the response of square-law and linear rectifiers to fluctuation voltages. Analyses of the square-law rectifier and of the linear rectifier in the presence of a dominant harmonic voltage are given. The analyses include the limitations imposed on the output by pre-rectification and post-rectification amplifiers, and are ...
openaire +1 more source
Assessing Voltage Fluctuations and Lamp Flicker Using RMS Voltages
IEEE Transactions on Power Delivery, 2017Quantifying the effect of voltage fluctuations in power systems using a flickermeter is documented in IEC 61000-4-15. Modern digital implementations of a flickermeter take continuous time voltage samples as inputs to a software processing algorithm which ultimately calculates the short-term flicker severity P st .
Daniel Lee Geiger, S. Mark Halpin
openaire +1 more source
SMES Based Dynamic Voltage Restorer for Voltage Fluctuations Compensation
IEEE Transactions on Applied Superconductivity, 2010This paper presents a superconducting magnetic energy storage (SMES) based dynamic voltage restorer (DVR) to protect consumers from the grid voltage fluctuations. Due to the characteristic of high energy density and quick response, a superconducting magnet is selected as the energy storage unit to improve the compensation capability of DVR.
null Jing Shi +6 more
openaire +1 more source
The representation and computation of fluctuation voltages
Journal of the Institution of Electrical Engineers, 1939Much has been written concerning the fundamental physics of fluctuation phenomena, but the methods to be used in computing signal/noise ratio in the complex circuits of modern communication engineering have never been fully described. This paper gives particulars of two methods by which such computations can be made by the ordinary processes of circuit
openaire +1 more source
Voltage fluctuations of metal-electrolyte interfaces in electrophysiology
Medical & Biological Engineering, 1966In addition to wide band thermal noise, metal-electrolyte interfaces generate spontaneous voltage fluctuations of electrochemical origin. They range in duration from less than 100 msec to more than several seconds. Special activities are spikes and semi-periodic oscillations. Amplitudes are usually below 1 mV on macroscopic specimens.
openaire +2 more sources
Fluorescent lamp modelling for voltage fluctuations
European Transactions on Electrical Power, 2001AbstractThe wide use of fluorescent lamps means their influence on the power system needs to be studied. A set of models that enables the evaluation of the electrical behaviour during steady state is presented in this paper. These models have different levels of complexity; starting by taking into account all the non‐linearities of the lamp, passing ...
C. Carrillo, J. Cidrás
openaire +1 more source