Results 31 to 40 of about 7,987,748 (370)

A Design of PWM Controlled Calibrator of Non-Sinusoidal Voltage Waveforms

open access: yesEnergies, 2019
Power quality conditions in electrical power networks have drastically changed in recent years. A number of electrical devices and power generators that are the main sources of disturbances is ever increasing.
Goran Petrovic   +3 more
doaj   +1 more source

A Novel Feature Extraction and Fault Detection Technique for the Intelligent Fault Identification of Water Pump Bearings

open access: yesSensors, 2021
The reliable and cost-effective condition monitoring of the bearings installed in water pumps is a real challenge in the industry. This paper presents a novel strong feature selection and extraction algorithm (SFSEA) to extract fault-related features ...
Muhammad Irfan   +8 more
doaj   +1 more source

A basic lock-in amplifier experiment for the undergraduate laboratory [PDF]

open access: yes, 2003
We describe a basic experiment for the undergraduate laboratory that demonstrates aspects of both, the science and the art of precision electronic measurements. The essence of the experiment is to measure the resistance of a small length of brass-wire to
Black, E. D.   +2 more
core   +1 more source

A General Easy-to-Use Expression for Uncertainty Evaluation in Residual Voltage Measurement

open access: yesIEEE Transactions on Instrumentation and Measurement, 2020
This paper addresses one of the new and most important issues arising when low-power voltage transformers (LPVTs) are used in power network substations for evaluating, among others, the residual voltage measurement.
A. Mingotti   +3 more
semanticscholar   +1 more source

Analysis of Traditional and Alternative Methods for Solving Voltage Problems in Low Voltage Grids: An Estonian Case Study

open access: yesEnergies, 2022
Smart Cities can benefit from existing municipal low voltage (LV) distribution grids by supporting public services with permanent power supply and providing grid connection points to distributed generators (DG).
Argo Rosin   +6 more
doaj   +1 more source

Concept level evaluation of the optical voltage and current sensors and an arrayed waveguide grating for aero-electrical system applications [PDF]

open access: yes, 2007
In this paper we present, for the first time, the hybrid fiber-optic voltage and current sensors interrogated using an arrayed waveguide grating (AWG) device.
Fusiek, G., McDonald, J.R., Niewczas, P.
core   +1 more source

Lightning Surge Immunity of LED Road Luminaires: A Comparative Study of Hybrid SPD, EMI Filter, and TVS-Diode Protection Strategies

open access: yesIEEE Access
This study presents an experimental evaluation of surge protection performance of a LED road luminaire subjected to standardized 8/ $20\mu $ s impulse stress.
Vasilios P. Androvitsaneas
doaj   +1 more source

Offline Measurement of Stator Resistance and Inverter Voltage Drop Using Least Squares

open access: yesIEEE Access, 2023
Modern industrial and commercial electrical drives are typically designed to control motors of different types, operating under scalar, field-oriented or direct torque control.
Anton Dianov, Alecksey Anuchin
doaj   +1 more source

Topology Detection in Microgrids with Micro-Synchrophasors

open access: yes, 2015
Network topology in distribution networks is often unknown, because most switches are not equipped with measurement devices and communication links. However, knowledge about the actual topology is critical for safe and reliable grid operation. This paper
Andersson, Göran   +5 more
core   +1 more source

The ballistic acceleration of a supercurrent in a superconductor

open access: yes, 2010
One of the most primitive but elusive current-voltage (I-V) responses of a superconductor is when its supercurrent grows steadily after a voltage is first applied.
Gabriel F. Saracila   +2 more
core   +1 more source

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