Results 261 to 270 of about 891,437 (305)

Squirrel-cage induction-motor core losses

Journal of the A.I.E.E., 1925
An experimental method is presented for segregating the various no-load losses of a squirrel-cage induction motor. It is shown that for insulated rotor bars the losses consist principally of stator fundamental-frequency losses, rotor surface losses and eddy-current losses in the rotor bars due to radial and tangential slot-leakage fluxes in the rotor ...
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Mathematical descriptions of core losses

Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1953
This paper presents results so far achieved by the writers in endeavoring to gain an understanding of the factors controlling a-c core losses in modern magnetic materials. Losses have been measured on a number of cores over a range of frequencies and at flux densities in the middle portions of the magnetization curves.
J. W. Hale, F. R. Richardson
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Deconvolution of core loss electron energy loss spectra

2009
Experimental electron energy loss spectra (EELS) are related to inelastic scattering events in the sample by the so called single scattering distribution S(E) [1] (the differential cross section after integration in the detector acceptance angle). The relationship between the experimental spectrum and its S(E) is complicated because of several effects,
G. Bertoni, J. Verbeeck
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New Magnetic Core Loss Comparator

Journal of Applied Physics, 1958
A new method has been developed for the rapid measurement of magnetic flux density and power loss in single sheet steel specimens. In use the sheet specimen is inserted into an exciting unit which generates an ac magnetomotive force to provide the required flux density.
R. E. Tompkins, L. H. Stauffer, A. Kaplan   +2 more
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Apparent core losses and core losses in five-limb amorphous transformer of 160 kVA

IEEE Transactions on Magnetics, 1998
Significant modifications of the shape of magnetic flux in columns and yokes were observed in the magnetic circuit of four amorphous cores used in a 3-phase transformer. The magnetic losses measured experimentally were significantly higher than the ones calculated theoretically.
S. Sieradzki, R. Rygal, M. Soinski
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Estimation of Core Loss in Fe-Ni Powder Cores

2024 IEEE International Magnetic Conference - Short papers (INTERMAG Short papers)
Intermag 2024 Presentation: VP14: Soft Magnetic ...
Mai Phuong Nguyen, Shigeyoshi Yoshida, Satoshi Okamoto, Takamichi Miyazaki, and Yasushi Endo   +4 more
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Intersheet eddy-current loss in laminated cores

Electrical Engineering, 1937
CORE LOSS in laminated structures subjected to an alternating magnetomotive force is made up of a hysteresis loss and an eddy-current loss. In modern power transformers the eddy-current loss is approximately 1/4 to 1/3 of the total loss.
L. V. Bewley, Hillel Poritsky
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Core loss in amorphous cut cores with air gaps

IEEE Transactions on Magnetics, 1989
The effects of air gaps on the high-frequency core loss in cut cores made of amorphous ribbons are discussed and methods to reduce the core loss in them are proposed. It has been found that the high-frequency core loss in amorphous cut cores with air gaps increases strikingly with increasing air-gap length. The increase in the core loss due to air gaps
H. Fukunaga, T. Eguchi, Y. Ohta, H. Kakehashi   +3 more
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Magnetic loss analysis in Mn–Zn ferrite cores

Journal of Magnetism and Magnetic Materials, 2006
Abstract Magnetic losses have been measured and analyzed upon a wide range of frequencies in Mn–Zn ferrite ring cores. Exploiting the concept of loss separation and modeling the conductivity process in the heterogeneous material as a function of frequency, the role of the different energy dissipation mechanisms has been elucidated.
BEATRICE, CINZIA, BOTTAUSCIO, ORIANO, CHIAMPI M, FIORILLO F, MANZIN, ALESSANDRA   +4 more
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Low loss multi-core anti-resonant hollow core fibre

Frontiers in Optics + Laser Science 2024 (FiO, LS)
We report a three-core hollow core optical fibre, with low loss guidance at visible and near-infrared wavelengths. Coupling between cores is very weak, while the breaking of rotational symmetry yields fabrication insights.
Robbie Mears, Kerrianne Harrington, William J Wadsworth, Jonathan C Knight, James M Stone, Tim A Birks   +5 more
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