Results 11 to 20 of about 7,419 (175)

INFLUENCE OF THE NUMBER OF ROTATION WINDING PHASES ON THE STRUCTURE AND PROPERTIES OF ELECTRIC MACHINE WITH THREE DEGREES OF FREEDOM ROTOR

open access: yesTekhnichna Elektrodynamika, 2023
The structure of an electric machine with a rotor, which has three degrees of freedom of rotation (EMTR) and consists of external and internal magnetic circuits, is considered. Between them, in the air gap of a spherical configuration, there is an m-phase rotation winding and a control winding.
І.S. Petukhov   +3 more
openaire   +1 more source

Electromagnetic-force calculation and fault diagnosis of shell transformer under inter-turn short circuit [PDF]

open access: yesAIP Advances
Aiming at the electromagnetic distribution law, winding mechanical response characteristics, and degree diagnosis of inter-turn short circuit fault locations of shell-type transformers under inter-turn short circuits, the research idea of “simulation ...
Duanjiao Li   +5 more
doaj   +1 more source

Corrosion Mechanism for Copper Sulfide Formation Induced by Dibenzyl Disulfide in Oil-Immersed Insulation

open access: yesIEEE Access, 2019
This paper investigated the influence of paper-wrapped on the deposition of sulfur corrosion on the insulation winding (paper-wrapped copper conductor) in oil-immersed insulation containing dibenzyl disulfide (DBDS).
Si-Hang Gao, Li-Jun Yang, Dong Ding
doaj   +1 more source

Effect of Damper Winding and Stator Slot Skewing Structure on No-Load Voltage Waveform Distortion and Damper Bar Heat in Large Tubular Hydro Generator

open access: yesIEEE Access, 2018
We study the influence of the damper bar pitch, the stator slot skewing degree, and the damper bar number per pole on the no-load voltage waveform harmonic distortion factor (HDF) and the damper winding heat of a tubular hydro generator.
Zhen-Nan Fan   +7 more
doaj   +1 more source

The Optimization Design of Short-Term High-Overload Permanent Magnet Motors Considering the Nonlinear Saturation

open access: yesEnergies, 2018
Electric actuators with fast dynamic response and high torque density are widely used in aerospace and industrial applications. In this paper, the design and optimization of a short-term high-overload permanent magnet synchronous motor (STHO-PMSM) is ...
Yu-Xi Liu   +5 more
doaj   +1 more source

Specific Features of Fluoroplastic Band Bending with Due Account of Various Modularity of Material

open access: yesНаука и техника, 2019
The paper considers a technological process for production of sealing rings by winding a band work-piece on a cylindrical caliber mandrel with subsequent endurance under load and further cutting of a spiral in rings and also studies the possibility to ...
G. A. Vershina, L. E. Reut
doaj   +1 more source

Fractional Slot Concentrated Windings: A New Method to Manage the Mutual Inductance between Phases in Three-Phase Electrical Machines and Multi-Star Electrical Machines

open access: yesMachines, 2015
Mutual inductance is a phenomenon caused by the circulation of the magnetic flux in the core of an electrical machine. It is the result of the effect of the current flowing in one phase on the other phases.
Olivier Barre, Bellemain Napame
doaj   +1 more source

Inter-Turn Short Circuits in Stator Winding of Permanent Magnet Synchronous Generator Dedicated for Small Hydroelectric Power Plants

open access: yesEnergies
This article presents the simulation results of inter-turn short circuits in the stator winding of a permanent magnet synchronous generator (PMSG) dedicated for small hydroelectric power plants.
Adam Gozdowiak, Maciej Antal
doaj   +1 more source

Accurate estimation of series capacitance using the high-frequency lumped model of transformer winding from FRI data measurements: An indirect measurement procedure

open access: yese-Prime: Advances in Electrical Engineering, Electronics and Energy
Measuring the series capacitance of a transformer winding is a challenging task because it cannot be directly measured with standard devices. This paper presents an indirect method to determine this key parameter, relying on only two measurements: the ...
Billel Allouane   +2 more
doaj   +1 more source

Methanol Marker for the Detection of Insulating Paper Degradation in Transformer Insulating Oil

open access: yesEnergies, 2019
This manuscript presents a comprehensive literature review with the aim to provide readers a reference document with up-to-date information on the field of methanol use as a chemical marker.
Jocelyn Jalbert   +4 more
doaj   +1 more source

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