Results 271 to 280 of about 82,272 (307)

Eddy current losses in PM canned motors

The XIX International Conference on Electrical Machines - ICEM 2010, 2010
Different approaches for the determination of eddy current losses in PM canned motors are presented. After a general description of the problem, an analytical model will be derived, which will be compared to numerical FEM calculations. In addition, the influence of the most important design parameters of the can will be discussed.
Y. Burkhardt, G. Huth, S. Urschel
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Eddy-current losses in reactor flux shields

Proceedings of the Institution of Electrical Engineers, 1970
The magnetic-field distribution is analysed for the case of an aluminium plate excited by a circular current loop, and an expression for the eddy-current loss in the plate is deduced. This analysis is tested by comparison with measurements on a model which closely resembles the theoretical geometry, and the results are shown to be in close agreement. A
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Eddy current losses in saturable magnetic materials

IEEE Transactions on Magnetics, 1994
In this paper, a finite element method, based on a variational formulation, is used to evaluate eddy current losses inside a nonlinear, saturable ferromagnetic material, for a two dimensional field problem. Boundary conditions are imposed in an integral form combined with Neumann conditions.
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Eddy current losses in laminated transformer cores

3D Africon Conference. Africon '92 Proceedings (Cat. No.92CH3215), 2003
A finite element method, based on the variational principle, for two-dimensional field configurations is used to evaluate eddy current losses in a sheet of a laminated transformer core assumed to be a linear homogeneous conducting medium. Boundary conditions are imposed in an integral form combined with Neumann conditions.
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Eddy current losses in passive magnetic bearings

Journal of Applied Physics, 2002
Passive magnetic bearings built with permanent magnets, such as NdFeB (neodynium–iron–boron) or SmCo (samarium–cobalt), are very reliable systems when used for industrial applications such as centrifuges or flywheels, as they do not require any electromagnetic coil supply. Nevertheless, during the rotational motion, gyroscopic effects (like precession)
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Eddy current losses in open-type cores

2022
• Purpose: The aim of this paper is to present a methodology for calculating eddy current losses in the core of a single-phase power voltage transformer, which, unlike a standard power transformer, has an open-type core (I-type core). In those apparatus, reduction of core losses is achieved by using a multi-part open-type core that is created by ...
Frljić, Stjepan, Trkulja, Bojan, Drandić, Ana   +2 more
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Eddy current losses in a

IEEE Transactions on Magnetics, 1974
W. Swift, J. Shilling, S. Bhate, F. Young   +3 more
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Eddy-current losses in thin ferromagnetic sheets

Proceedings of the IEE Part C: Monographs, 1958
In very weak fields, the eddy-current losses in a lamination may be calculated exactly but the observed loss is always somewhat greater. Most of this extra loss varies with frequency and field in the same way as eddy-current loss, and if a quantity η equal to the ratio of the observed to calculated loss is defined it is found that it increases rapidly ...
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Eddy current losses of permanent magnet motors

IEE Proceedings - Electric Power Applications, 1994
A simple and effective method for calculating the core eddy current losses in permanent magnet motors is presented. It uses the back EMF per tooth induced in the stator windings by the rotation of the permanent magnets. The eddy current losses of the stator yoke can also be evaluated as a function of the back EMF per tooth waveform.
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A unified description of non-radiative voltage losses in organic solar cells

Nature Energy, 2021
Xian-Kai Chen, Deping Qian, Yuming Wang
exaly