Results 21 to 30 of about 5,737,218 (322)

A 3D CFD-Based Workflow for Analyses of a Wide Range of Flow and Heat Transfer Conditions in Air Gaps of Electric Machines

open access: yesFluids, 2022
Increasing power densities of electric machines in e-vehicles in addition to the resulting quest for enhanced cooling concepts are bringing forward the importance of defining adequate heat transfer correlations in air gaps.
Anton Žnidarčič, Tomaž Katrašnik
doaj   +1 more source

Sound absorption by clamped poroelastic plates [PDF]

open access: yes, 2008
Measurements and predictions have been made of the absorption coefficient and the surface acoustic impedance of poroelastic plates clamped in a large impedance tube and separated from the rigid termination by an air gap.
Attenborough K.   +4 more
core   +1 more source

Moisture transport in the ventilated channel with heating by coil [PDF]

open access: yesИнженерно-строительный журнал, 2017
This article considers the moisture transport phenomenon in the vertical ventilated channel. HVF construction parameters are determined influencing the rate of moisture transport. It is necessary to have h ≤ L/25 ≈ 8 cm.
E.A. Statsenko   +4 more
doaj   +1 more source

Research on a fault current limiter based on variable reactor

open access: yesZhejiang dianli, 2022
With the increase of the power load in power grid, the short circuit level continues to rise, and excessive short-circuit current will do great damage to power equipment and imperil power systems.
GU Yu   +3 more
doaj   +1 more source

Photonic band gap in isotropic hyperuniform disordered solids with low dielectric contrast [PDF]

open access: yes, 2013
We report the first experimental demonstration of a TE-polarization photonic band gap (PBG) in a 2D isotropic hyperuniform disordered solid (HUDS) made of dielectric media with a index contrast of 1.6:1, very low for PBG formation.
Chaikin, Paul   +9 more
core   +1 more source

Measuring Transducer for Air Gap Capacitive Sensor in Hydrogenerator

open access: yesПриборы и методы измерений, 2020
One of the most important parameters of powerful hydro generators (HG) is the air gap between the rotor and the stator, and its deviation from the set norms is a defect that can lead to serious accidents.
A. S. Levytskyi   +3 more
doaj   +1 more source

Full-Scale Experiments of Water-Mist Systems for Control and Suppression of Sauna Fires

open access: yesFire, 2022
Sauna is a common fixture in many facilities; a specific fire-protection system is typically designed and installed for this application, as short circuits or direct contact with incandescent materials may result in a fire.
Paolo E. Santangelo   +2 more
doaj   +1 more source

The air gap between tape and drum in a video recorder [PDF]

open access: yes, 1991
Lubrication with ambient air is not quite generally applied. The best known application is the "oil bearing" in tape recording systems for audio, video and computer applications; where the gap height that is needed for effective lubrication may quite ...
Moes, H.
core   +3 more sources

Practical Adaptation of a Low-Cost Voltage Transducer with an Open Feedback Loop for Precise Measurement of Distorted Voltages

open access: yesSensors, 2019
This paper presents the project proposal of a low-cost transducer with a Hall-effect sensor placed in a ferromagnetic core’s air gap, which enables the measurement of the distorted voltage instantaneous values without the feedback loop used for ...
Maciej Sulowicz   +4 more
doaj   +1 more source

Impact of 3D air gap eccentricity on winding insulation temperature characteristic in PMSG

open access: yesAlexandria Engineering Journal
The static air gap eccentricity is one of the prevalent faults in permanent magnet synchronous generators. In previous studies, the variation of magnetic flux density, stator current and vibration have been studied mostly.
Yu-Ling He   +6 more
doaj   +1 more source

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