Results 291 to 300 of about 7,856,512 (343)

Magnetic Losses at Low Temperatures

Journal of Applied Physics, 1959
The 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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Formulas for magnetic hysteresis losses

Electrical Engineering, 1933
This 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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Temperature Dependence of Magnetic Losses

1962
The 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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Magnetic manganese-based composites with multiple loss mechanisms towards broadband absorption

Nano Reseach, 2022
Yue Liu, Zirui Jia, Qianqian Zhan, Yuhao Dong, Qimeng Xu, Guanglei Wu   +5 more
semanticscholar   +1 more source

Magnetization Noise and Power Loss in Magnetic Materials

1978
Magnetization 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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Synergetic dielectric loss and magnetic loss towards superior microwave absorption through hybridization of few-layer WS2 nanosheets with NiO nanoparticles.

Science Bulletin, 2020
Deqing Zhang, Yingfei Xiong, Junye Cheng, Jixing Chai, Tingting Liu, Xuewei Ba, S. Ullah, G. Zheng, Ming Yan, M. Cao   +9 more
semanticscholar   +1 more source

Containment shells cut magnetic losses

World Pumps, 2018
HMD Kontro has expanded the range for its ZeroLoss containment shells to Frame l, ll and lll versions of its sealless magnetic drive pumps.
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Evolution of dielectric loss-dominated electromagnetic patterns in magnetic absorbers for enhanced microwave absorption performances

Nano Reseach, 2021
Xiaogu Huang, Man Qiao, Xiaochi Lu, Yafei Li, Yabin Ma, Bo Kang, Bin Quan, G. Ji   +7 more
semanticscholar   +1 more source

Magnetic loss in soft ferrites

Journal of Applied Physics, 2007
In 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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Magnetic materials and iron losses

2008
Most electrical machines and instruments rely on magnetism for their operation, and in many cases ferromagnetic materials are used, since the magnetic flux produced is thereby increased. This chapter considers some of the properties of these materials and indicates that in many cases the application of magnetic materials brings with it problems which ...
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