Results 301 to 310 of about 176,229 (354)
Some of the next articles are maybe not open access.
Eddy current losses in ferromagnetic laminations
Journal of Applied Physics, 2000It is demonstrated through the comparison of analytical, numerical, and experimental results that the existence of excess eddy current losses can be explained by the peculiar nature of the nonlinear diffusion of electromagnetic fields in magnetically nonlinear laminations. The essence of this peculiar nature is that nonlinear diffusion occurs as inward
SERPICO, CLAUDIO +4 more
openaire +3 more sources
Eddy Current Loss Calculation for Permanent Magnet Eddy-current Coupler
2020 7th International Conference on Information Science and Control Engineering (ICISCE), 2020This paper presents an analytical method for calculating the eddy current loss of permanent magnet eddy-current coupler (PMEC). A magnetic equivalent circuit (MEC) model considering the eddy current effect and leakage is established. Then, based on Kirchhoff’s law and Ampere’s law of loop, the flux density passing through the conductor rotor and the ...
Wei Liu +5 more
openaire +1 more source
Eddy-Current Losses in Mn-Zn Ferrites
IEEE Transactions on Magnetics, 2014We predict the contribution of eddy currents to power losses in polycrystalline Mn-Zn ferrites and apply it to experimental results obtained on a broad frequency range in different commercial materials and differently sized ring samples. It is verified by theory and experiment that the eddy currents can, in sufficiently large specimens, measurably ...
Fiorillo F +3 more
openaire +2 more sources
Eddy current and hysteresis losses in ferromagnetic media
IEEE Transactions on Magnetics, 1998This paper is a contribution to the evaluation of losses in ferromagnetic media, due to eddy currents and magnetic hysteresis, the field source being the time harmonic induced e.m.f. The fundamental field equations are solved numerically by using a finite element formulation, corresponding to the space discretization, and a second order trapezoidal ...
V.M. Machado, A.L. Ribeiro
openaire +1 more source
Magnetic Characteristics and Excess Eddy Current Losses
2009 IEEE Industry Applications Society Annual Meeting, 2009To study the fundamental essence of excess losses and to achieve an accurate core loss separation formula, a dynamic finite element model for the non-linear hysteresis loop of laminations has been established. In the model, Maxwell's Equations are solved for the hysteresis character in the magnetic lamination, using the Galerkin finite element method ...
Yu Zhang, Ming-C. Cheng, Pragasen Pillay
openaire +1 more source
No-load copper eddy-current losses
Journal of the A.I.E.E., 1926One of the factors which is sometimes responsible for very considerable losses in rotating machines is that of eddy-current losses in the copper conductors resulting from slot leakage flux produced by the main flux. These losses occur at no-load as well as under load and should not be confused with the copper losses resulting from the slot leakage flux
openaire +2 more sources
Eddy Current Losses in Conducting Slabs
IEEE Transactions on Power Apparatus and Systems, 1971This paper considers the problem of calculating the eddy current losses in a rectangular conducting slab in a magnetic field which would be uniform if the slab were not present. The length axis is perpendicular to the uniform field, but there may be an angular displacement' about this axis.
J. McWhirter, M. Thomas
openaire +1 more source
Eddy current losses at cryogenic temperatures
IEEE Transactions on Magnetics, 1993The effect of thermal processes on eddy-current losses in the structural elements of cryogenic and superconducting devices are analyzed. Maxwell's equations coupled with the heat-conduction equation are solved, taking into account the dependence of resistivity, heat capacity, and heat-transfer coefficient on temperature.
V. Sokolovsky, V. Meerovich, M. Slonim
openaire +1 more source
Intersheet eddy-current loss in laminated cores
Electrical Engineering, 1937CORE 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
openaire +1 more source
Eddy Current Losses in Armature Conductors
Transactions of the American Institute of Electrical Engineers, 1920This paper is an extension to the author's paper in Vo. XXXIX Pages 997 to 1047 on Eddy Current Losses in Armature Conductors. In this present paper additional formulas are given for the cases where transposed coils are used and also methods given for quickly estimating the increased loss due to eddy currents.
openaire +1 more source