Results 11 to 20 of about 893,570 (306)

Non-Destructive Electromagnetic Evaluation of Material Degradation Due to Steel Cutting in a Fully Stacked Electrical Machine

open access: yesEnergies, 2022
Although it is well known that the magnetic properties of electrical steel can be deeply affected by the cutting process, it is still not clear how to accurately evaluate these effects on a prototyped machine on its final shape, especially at a high ...
Ahmed Selema   +2 more
doaj   +1 more source

Analysis of Core Losses in Transformer Working at Static Var Compensator

open access: yesEnergies, 2023
This article presents the comparison of 3D and 2D finite element models of a power transformer designed for reactive power compensation stations. There is a lack of studies in the literature on internal electromagnetic phenomena in the active part of a ...
Piotr Osinski, Pawel Witczak
doaj   +1 more source

Low Loss Tapered Polysilicon Core Fibers [PDF]

open access: yesConference on Lasers and Electro-Optics, 2016
We have fabricated small core polysilicon waveguides by tapering bulk, as-drawn silicon optical fibers. The taper process acts to improve the local crystallinity of the core, resulting in a significant reduction in the material loss.
Suhailin, Fariza   +8 more
openaire   +2 more sources

Low Loss Antiresonant Hollow Core Fibres [PDF]

open access: yesAdvanced Photonics, 2011
We study the loss mechanisms in novel antiresonant hollow-core fibres and demonstrate the importance of optimising the air-cladding thickness and reducing the node size. Based on these rules we fabricate fibres with wide-bandwidth and low-loss.
Poletti, F.   +2 more
openaire   +2 more sources

Adaptive Switching Frequency Selection Based on Two-Step Efficiency Optimization for Grid-Connected Inverters

open access: yesIEEE Access, 2021
A two-step efficiency optimization of a three-phase voltage source inverter with series R damped LCL filter is proposed. The first optimization step aims to find the optimal parameters of the series R damped LCL filter at rated load conditions.
Ahmed Koran   +2 more
doaj   +1 more source

Study on magnetic properties of FeSiCr soft magnetic powders prepared by water atomization

open access: yesFenmo yejin jishu, 2021
The FeSiCr soft magnetic alloy powders were prepared by water atomization, and the powders with the particle size (D50) between 5 and 40 μm were obtained.
MENG Ling-bing   +5 more
doaj   +1 more source

Equation of motion coupled-cluster approach for intrinsic losses in x-ray spectra

open access: yes, 2020
We present an equation of motion coupled cluster approach for calculating and understanding intrinsic inelastic losses in core level x-ray absorption spectra (XAS).
Hirshberg, Nitzan Y.   +5 more
core   +1 more source

A New Application of Transient Recorder to Magnetic Measurements (Part I: Core Loss Measurement at Very Low Frequencies) [PDF]

open access: yes, 1976
A new method have been developed based upon analogue-to-digital conversion techniques and memories. The method involves the scaling of operating frequency from "real" to "optimum" for the power loss measurement.
Ishihara, Yoshiyuki   +3 more
core   +1 more source

Comparison of motor stator teeth built of soft magnetic composite and laminated silicon steel sheets in an axial flux permanent magnet synchronous machine [PDF]

open access: yes, 2015
This paper compares the iron losses generated by the concentrated excitation windings for the axial flux permanent magnet synchronous machine stator core elements constructed with laminated silicon steel sheets and soft magnetic composites. The two types
De Gersem, Herbert   +2 more
core   +2 more sources

Design of a PM Vernier Machine with Consideration for Modulation Flux and Comparison with Conventional PM motors

open access: yesEnergies, 2017
This study deals with the core design of a PM vernier machine considering modulation flux effects, and the comparative investigation on volume and performance characteristics of the vernier over conventional PM machines are addressed.
Byungtaek Kim
doaj   +1 more source

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