Results 31 to 40 of about 1,958 (119)

Effect of the magnetic material on AC losses in HTS conductors in AC magnetic field carrying AC transport current

open access: yesAIP Advances, 2015
This paper presents an investigation on the AC losses in several typical superconducting composite conductors using the H-formulation model. A single superconducting strip with ferromagnetic substrate or cores and a stack of coated conductors with ...
Xing-Xing Wan   +3 more
doaj   +1 more source

An Electromagnetic Design of a Fully Superconducting Generator for Wind Application

open access: yesEnergies, 2021
A fully superconducting wind generator employs superconductors in stator and rotor to enable high torque density and low weight, that is, enable an ultra-light electric machine for wind application.
Yingzhen Liu   +8 more
doaj   +1 more source

AC Iron Loss Prediction and Magnetic Properties of Fe-6.5 wt. % Si Ribbons Prepared by Melt-Spinning

open access: yesMetals, 2018
Ultra-thin Fe-6.5 wt. % Si ribbons of 35 μm in thickness were prepared by melt-spinning. The magnetic properties were investigated before and after annealing at 1000 °C.
Shuai Wang   +4 more
doaj   +1 more source

AC losses calculation of parallel multi‐strand flat wire windings for automotive drive motor

open access: yesIET Electric Power Applications
Automobile drive motor with flat wire winding has improved the slot fill factor and efficiency. However, under the current environment of drive motors development to high frequency and voltage, the increase in winding AC loss has weakened those ...
Peipei Yang   +3 more
doaj   +1 more source

Power conversion efficiency prioritized AC filter inductor design for three-phase PWM inverter

open access: yesAIP Advances, 2021
This study was conducted to develop a design method of power density and efficiency maximization for three-phase pulse-width modulated (PWM) inverters that include AC filter. A tradeoff relationship exists between power density and efficiency. In general,
Hiroaki Matsumori   +5 more
doaj   +1 more source

Numerical Simulations on AC Loss of the REBCO Tape Under Rotating Magnetic Field

open access: yesIEEE Access, 2023
REBCO coated conductors are exposed to rotating magnetic fields in various high-temperature superconducting (HTS) applications, such as HTS rotating machines and flux pumps.
Yuan Wang   +5 more
doaj   +1 more source

A Comprehensive Loss Model and Comparison of AC and DC Boost Converters

open access: yesEnergies, 2021
DC microgrids have become a prevalent topic in research in part due to the expected superior efficiency of DC/DC converters compared to their AC/DC counterparts.
Daniel L. Gerber   +6 more
doaj   +1 more source

Current distribution and AC losses in twisted multifilamentary AC superconductors [PDF]

open access: yesIEEE Transactions on Magnetics, 1989
The development of AC superconductors has led to multifilamentary wires having a highly resistive matrix material and a small twist pitch and filament diameter. A numerical one-dimensional model is presented which enables the authors to calculate the current distribution as well as the magnetization and transport current loss in a current-carrying AC ...
Roovers, A.J.M., van de Klundert, L.J.M.
openaire   +2 more sources

A distinct method to eliminate the induced voltage in AC loss determination without phase control

open access: yesAIP Advances, 2020
AC loss is often considered one of the most important design parameters that guide the fabrication of superconducting devices. Thus, the electrometric method to determine AC loss of superconductors is crucial.
Liuyang Shen   +3 more
doaj   +1 more source

A parameter for IL-10 and TGF-ß mediated regulation of HIV-1 specific T cell activation provides novel information and relates to progression markers. [PDF]

open access: yesPLoS ONE, 2014
HIV replication is only partially controlled by HIV-specific activated effector T cells in chronic HIV infection and strategies are warranted to improve their efficacy.
Andreas Lind   +5 more
doaj   +1 more source

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