Results 21 to 30 of about 325,840 (312)

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

Notes on the measurement of high voltage [PDF]

open access: yesProceedings of the American Institute of Electrical Engineers, 1916
A briet account is given of some experiments made to determine mine the relative accuracy of certain methods used in measuring high voltages. The methods comprise the use of a tertiary (or voltmeter) coil in the high-tension transformer, the direct measurement of voltage by a crest voltage meter and the derivation of the high-tension pressure from the ...
openaire   +1 more source

Power Interference Suppression Method for Measuring Partial Discharges under Pulse Square Voltage Conditions

open access: yes, 2022
Partial discharge (PD) is an important metric for the insulation diagnosis of power equipment. However, its detection is affected by the strong electromagnetic interference generated by pulse square voltage.
Linao Li, Xinlao Wei
core   +1 more source

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

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

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

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

Molecular mechanisms of the coupling of gating to voltage sensing in transmembrane proteins [PDF]

open access: yes, 2014
Voltage gated potassium ion (Kv) channels regulate action potentials of the nervous system by responding to changes in transmembrane voltage, enabling K+ transport across the membrane to restore cells to their resting potential.
Starek, Greg
core   +1 more source

Comparative high voltage impulse measurement

open access: yesJournal of Research of the National Institute of Standards and Technology, 1996
A facility has been developed for the determination of the ratio of pulse high voltage dividers over the range from 10 kV to 300 kV using comparative techniques with Kerr electro-optic voltage measurement systems and reference resistive voltage dividers. Pulse voltage ratios of test dividers can be determined with relative expanded uncertainties of 0.4
FitzPatrick, Gerald J.   +1 more
openaire   +2 more sources

Smart-Grid Technologies and Climate Change: How to Use Smart Sensors and Data Processing to Enhance Grid Resilience in High-Impact High-Frequency Events

open access: yesEnergies
Smart-grid technologies are essential to achieving sustainable high-level grid resilience. Integrating sensors and monitoring devices throughout grid infrastructure provides additional data on weather-related parameters in real-time, enabling the smart ...
Eleni G. Goulioti   +3 more
doaj   +1 more source

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