Results 1 to 10 of about 546,035 (307)

Research on distribution of winding leakage magnetic field of three-phase dry type transformer under short-circuit condition

open access: yesEnergy Reports, 2023
Leakage flux magnitude and pattern greatly affect transformer short-circuit resistance. In this paper, finite element calculations and experimental measurements is used to calculate the leakage magnetic field of a transformer.
Tiannan Meng   +5 more
doaj   +1 more source

Host age structure reshapes parasite symbiosis: collaboration begets pathogens, competition begets virulent mutualists

open access: yesBiology Direct, 2022
Background Symbiotic relationships are ubiquitous in the biosphere. Inter-species symbiosis is impacted by intra-specific distinctions, in particular, those defined by the age structure of a population.
Carsten O. S. Portner   +6 more
doaj   +1 more source

Analysis of temperature characteristics of power transformer withstand short circuit shock for two seconds

open access: yesEnergy Reports, 2023
The occurrence of a short-circuit fault in a transformer results in a rapid increase in the short-circuit current, and the temperature of the transformer winding rises rapidly.
Junyang Wang   +5 more
doaj   +1 more source

Electrostatic Simulations for the DUNE ND-GAr Field Cage

open access: yesParticles, 2022
ND-GAr is one of three detector systems in the design of the DUNE Near Detector complex, which will be located on the Fermilab campus, sixty meters underground and 570 m from the source of an intense neutrino beam. ND-GAr will consist of a cylindrical 10-
Christopher Hayes, Jon Urheim
doaj   +1 more source

Development of a rapid cooling atomizing method and production of high-Bs nanocrystalline powders containing large-sized particles

open access: yesAIP Advances, 2020
We attempted to produce nanocrystalline soft magnetic powders with a high saturation magnetic flux density (Bs) and containing large-sized particles using a modified water atomization system named “HPWA/YK.” Almost fully amorphous powders containing ...
K. Uji   +4 more
doaj   +1 more source

Effects of shrink fitting on iron losses of a permanent magnet synchronous motor with an amorphous core

open access: yesIET Electric Power Applications, 2022
In order to investigate the effects of shrink fitting on the amorphous core, a test device is designed and the magnetisation and specific iron loss characteristics of the amorphous core are measured.
Longfei Zhu   +3 more
doaj   +1 more source

General Analytical Model of Magnet Average Eddy-Current Volume Losses for Comparison of Multi-phase PM Machines with Concentrated Winding [PDF]

open access: yes, 2014
this paper studies magnet eddy-current losses in permanent magnet (PM) machines with concentrated winding. First of all, space harmonics of magnetomotive force (MMF) and their influence on magnet losses in electrical machines are investigated.
ASLAN, Bassel   +2 more
core   +6 more sources

Loss Calculation and Thermal Analysis for High-Speed Permanent Magnet Synchronous Machines

open access: yesIEEE Access, 2020
The small size of high-speed permanent magnet synchronous machines (PMSMs) makes the increase of loss density and the difficulty of heat dissipation.
Chao Zhang   +3 more
doaj   +1 more source

Magnetic Interference on Cardiac Implantable Electronic Devices From Apple iPhone MagSafe Technology

open access: yesJournal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2021
Background Magnet wireless charging is being utilized increasingly in current generation smartphones. Apple's MagSafe is a proprietary wireless charging technology with an array of magnets that has the capacity to generate magnet fieldstrength >50 gauss (
Fahd Nadeem   +3 more
doaj   +1 more source

A Nonlinear Impact-Driven Triboelectric Vibration Energy Harvester for Frequency Up-Conversion

open access: yesMicromachines, 2023
Energy harvesting effectively powers micro-sensors and wireless applications. However, higher frequency oscillations do not overlap with ambient vibrations, and low power can be harvested.
Hadeel Abumarar, Alwathiqbellah Ibrahim
doaj   +1 more source

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