Results 301 to 310 of about 11,255,110 (351)
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Magnetic Losses at Low Temperatures
Journal of Applied Physics, 1959The total magnetic losses in a silicon steel transformer core have been measured at temperatures from 20° to 273°K using a variable-frequency simple-harmonic flux wave with magnetic field intensity amplitudes Bm from 2 to 10 kilogauss. The hysteresis, or frequency independent, part of the losses was obtained by graphical extrapolation.
E. H. Brown, J. R. Brennand
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Journal of Magnetism and Magnetic Materials, 2019
FeSiAl/Fe3O4 core-shell composite particles and transformed Fe3Si/Al2O3 composite compacts have been prepared via ball milling coating combined with subsequent spark plasma sintering (SPS) process.
F. Luo +7 more
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FeSiAl/Fe3O4 core-shell composite particles and transformed Fe3Si/Al2O3 composite compacts have been prepared via ball milling coating combined with subsequent spark plasma sintering (SPS) process.
F. Luo +7 more
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Loss estimation of magnetic gears
Electrical Engineering, 2019Reduction in losses is essential for the efficiency enhancement of magnetic gears. In this paper, the power losses of a coaxial magnetic gear are estimated, based on a developed convenient approach for loss analysis using a time-dependent finite element model.
Valentin Mateev, Iliana Marinova
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Journal of Magnetism and Magnetic Materials, 2019
The Mn-Zn ferrite nanoparticles with a spinel structure were successfully prepared by using chemical co-precipitation method. The formed magnetic ferrite particles were coated on the surface of Fe-6.5 wt%Si alloy particles with the epoxy resin to prepare
M.-M. Zhou +10 more
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The Mn-Zn ferrite nanoparticles with a spinel structure were successfully prepared by using chemical co-precipitation method. The formed magnetic ferrite particles were coated on the surface of Fe-6.5 wt%Si alloy particles with the epoxy resin to prepare
M.-M. Zhou +10 more
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Magnetization Noise and Power Loss in Magnetic Materials
1978Magnetization noise originates in a ferromagnet when Bloch walls are irreversibly displaced under the action of an applied field. The voltage noi se detected in a winding linked to the specimen is called Barkhausen noise, and, since its discovery, it has been widely studied in several types of ferromagnetic materials under various physical conditions ...
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Low-loss and high-induction Fe-based soft magnetic composites coated with magnetic insulating layers
, 2019We have provided a new and simple coating strategy to fabricate high-performance metal-based magnetic composites exhibiting both high magnetic inductions and decreased core loss.
Bingyang Meng +5 more
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Summary of losses in magnetic materials
IEEE Transactions on Magnetics, 2002Current concepts of the physical origin and mechanisms of losses in magnetic materials are reviewed under three traditional categories: hysteresis losses, eddy-current or dielectric losses, and residual losses. The phenomenological Landau-Lifshitz equation is used to quantitatively express the various manifestations of the residual losses.
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Temperature Dependence of Magnetic Losses
1962The rapidly increasing use of electric motors, transformers, and other electrical equipment operating at cryogenic temperatures has created an urgent need for engineering data on the low-temperature magnetic losses of ferromagnetic materials. Unfortunately, such data have been very scarce. Therefore, a research program in this field was begun under the
J. J. Gniewek, R. L. Powell
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Formulas for magnetic hysteresis losses
Electrical Engineering, 1933This article describes an investigation to determine the magnetic properties of different grades of silicon sheet steel when symmetrically and unsymmetrically magnetized; from the results a formula has been derived which should be of value in designing electrical apparatus used in circuits where alternating and direct currents are superposed.
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Magnetic loss in soft ferrites
Journal of Applied Physics, 2007In order to understand the anomalous magnetic field dependence of the high frequency (200kHz–1.0MHz) losses, we consider the high field conductivity of the soft ferrites. We show that the high field conductivity is highly nonlinear. Separately, we show that this nonlinear behavior is due to tunneling between adjacent ferrite grains.
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