Eddy current distributions: Their calculation with a spreadsheet and their measurement with a dual dipole antenna probe

1991 ◽  
Vol 59 (5) ◽  
pp. 461-467 ◽  
Author(s):  
Francis X. Hart ◽  
Kenneth W. Wood
Keyword(s):  
Eddy Current ◽  
Dipole Antenna ◽  
Current Distributions

scholarly journals VISUALIZATION OF EDDY CURRENT DISTRIBUTIONS FOR ARBITRARILY SHAPED COILS PARALLEL TO A MOVING CONDUCTOR SLAB

2016 ◽  
Vol 47 ◽  
pp. 1-12 ◽  
Author(s):  
Toshiya Itaya ◽  
Koichi Ishida ◽  
Yasuo Kubota ◽  
Akio Tanaka ◽  
Nobuo Takehira
Keyword(s):  
Eddy Current ◽  
Current Distributions ◽  
Moving Conductor

scholarly journals 3D harmonic modeling of eddy currents in segmented conducting structures

2019 ◽  
Vol 38 (1) ◽  
pp. 2-23 ◽  
Author(s):  
C.H.H.M. Custers ◽  
J.W. Jansen ◽  
M.C. van Beurden ◽  
E.A. Lomonova
Keyword(s):  
Finite Element ◽  
Eddy Current ◽  
Eddy Currents ◽  
Three Dimensional ◽  
Spatial Period ◽  
Content Type ◽  
Current Distributions ◽  
Wide Range ◽  
Conductivity Function ◽  
Electromagnetic Quantities

PurposeThe purpose of this paper is to describe a semi-analytical modeling technique to predict eddy currents in three-dimensional (3D) conducting structures with finite dimensions. Using the developed method, power losses and parasitic forces that result from eddy current distributions can be computed.Design/methodology/approachIn conducting regions, the Fourier-based solutions are developed to include a spatially dependent conductivity in the expressions of electromagnetic quantities. To validate the method, it is applied to an electromagnetic configuration and the results are compared to finite element results.FindingsThe method shows good agreement with the finite element method for a large range of frequencies. The convergence of the presented model is analyzed.Research limitations/implicationsBecause of the Fourier series basis of the solution, the results depend on the considered number of harmonics. When conducting structures are small with respect to the spatial period, the number of harmonics has to be relatively large.Practical implicationsBecause of the general form of the solutions, the technique can be applied to a wide range of electromagnetic configurations to predict, e.g. eddy current losses in magnets or wireless energy transfer systems. By adaptation of the conductivity function in conducting regions, eddy current distributions in structures containing holes or slit patterns can be obtained.Originality/valueWith the presented technique, eddy currents in conducting structures of finite dimensions can be modeled. The semi-analytical model is for a relatively low number of harmonics computationally faster than 3D finite element methods. The method has been validated and shown to be computationally accurate.

scholarly journals Analysis of eddy current distributions in the CMS magnet yoke during the solenoid discharge

2005 ◽  
Vol 52 (3) ◽  
pp. 741-744 ◽  
Author(s):  
V.I. Klyukhin ◽  
D. Campi ◽  
B. Cure ◽  
A. Gaddi ◽  
H. Gerwig ◽  
...  
Keyword(s):  
Eddy Current ◽  
Current Distributions ◽  
Magnet Yoke

scholarly journals Two Novel Information Entropy Indices for Analysis of the Eddy Current Distribution

Entropy ◽  
2018 ◽  
Vol 20 (9) ◽  
pp. 699 ◽  
Author(s):  
Guolong Chen
Keyword(s):  
Current Distribution ◽  
Eddy Current ◽  
Radial Direction ◽  
Current Sensor ◽  
Koch Curve ◽  
Intersection Angle ◽  
Current Distributions ◽  
Exciting Frequency ◽  
Exciting Coil ◽  
Lift Off

The Koch curve exciting coil eddy current sensor is a kind of novel flexible planar eddy current probe. In this study, an intersection angle spectrum entropy index and a radial direction energy spectrum entropy were proposed to evaluate the eddy current distribution. Eddy current distributions induced by one turn of a circular coil and one turn of a second order Koch curve coil feed with different exciting frequency alternative currents and at different lift-off distances, were simulated and the eddy current distributions varying with lift-off distance in different exciting frequencies were compared by the two proposed indices. With the increase of the lift-off distance or the decrease of exciting frequency, the similarity between the shape of the Koch curve and the eddy current distribution became weakened and the degree of the concentration of the eddy current distribution in the specimen under the exciting coil was loosened.

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