scholarly journals Predicted Secondary Current Distributions for Linear Kinetics in a Modified Three‐Dimensional Hull Cell

1990 ◽  
Vol 137 (6) ◽  
pp. 1848-1851 ◽  
Author(s):  
F. A. Jagush ◽  
R. E. White ◽  
William E. Ryan
Keyword(s):  
Three Dimensional ◽  
Secondary Current ◽  
Hull Cell ◽  
Linear Kinetics ◽  
Current Distributions

scholarly journals Secondary Current Distributions Using TOPAZ2D and Linear Kinetics

1988 ◽  
Vol 135 (3) ◽  
pp. 656-658 ◽  
Author(s):  
E. C. Dimpault‐Darcy ◽  
R. E. White
Keyword(s):  
Secondary Current ◽  
Linear Kinetics ◽  
Current Distributions

Secondary Current Distribution in a Curvilinear Hull Cell

1998 ◽  
Vol 145 (9) ◽  
pp. 3042-3046 ◽  
Author(s):  
Jongwook Lee ◽  
Thomas W. Chapman
Keyword(s):  
Current Distribution ◽  
Secondary Current ◽  
Hull Cell

scholarly journals Characteristic Mode Analysis of surface current distributions on metallic structures exposed to HIRF- and DCI-excitations

2020 ◽  
Vol 18 ◽  
pp. 33-41
Author(s):  
Jan Ückerseifer ◽  
Frank Gronwald
Keyword(s):  
Three Dimensional ◽  
Surface Current ◽  
Resonance Region ◽  
Mode Analysis ◽  
Surface Currents ◽  
Characteristic Mode ◽  
Metallic Structures ◽  
Current Distributions ◽  
Characteristic Modes ◽  
Physical Quantities

Abstract. This paper treats Characteristic Mode Analyses of three-dimensional test objects in the context of EMC. Based on computed Characteristic Modes and mode-specific physical quantities, series expansions for HIRF- and DCI-induced surface currents are deduced. The contribution of single Characteristic Modes to surface currents at different test frequencies is analyzed. HIRF- and DCI-excitations are compared with regard to their surface current distributions in their resonance region determined by Characteristic Mode Analysis.

scholarly journals Modeling the Influence of the Penetration Channel’s Shape on Plasma Parameters When Handling Highly Concentrated Energy Sources

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Dmitriy N. Trushnikov ◽  
Ekaterina S. Salomatova ◽  
Igor I. Bezukladnikov ◽  
Igor L. Sinani ◽  
K. P. Karunakaran
Keyword(s):  
Electron Beam Welding ◽  
Gaussian Function ◽  
Three Dimensional ◽  
Energy Sources ◽  
Plasma Parameters ◽  
Statistical Probability ◽  
Secondary Current ◽  
Thermal Fields ◽  
Sustained Discharge ◽  
A Current

In our work to formulate a scientific justification for process control methods when processing materials using concentrated energy sources, we develop a model that can calculate plasma parameters and the magnitude of the secondary waveform of a current from a non-self-sustained discharge in plasma as a function of the geometry of the penetration channel, thermal fields, and the beam’s position within the penetration channel. We present the method and a numeric implementation whose first stage involves the use of a two-dimensional model to calculate the statistical probability of the secondary electrons’ passage through the penetration channel as a function of the interaction zone’s depth. Then, the discovered relationship is used to numerically calculate how the secondary current changes as a distributed beam moves along a three-dimensional penetration channel. We demonstrate that during oscillating electron beam welding the waveform has the greatest magnitude during interaction with the upper areas of the penetration channel and diminishes with increasing penetration channel depth in a way that depends on the penetration channel’s shape. When the surface of the penetration channel is approximated with a Gaussian function, the waveform decreases nearly exponentially.

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 A finite difference equivalent circuit approach to secondary current modelling in annular porous electrodes

2001 ◽  
Vol 5 (2) ◽  
pp. 119-132
Author(s):  
T. W. Farrell ◽  
D. L. S. Mcelwain ◽  
D. A. J. Swinkels
Keyword(s):  
Finite Difference ◽  
Equivalent Circuit ◽  
Porous Electrode ◽  
Porous Electrodes ◽  
Degree Of Polarization ◽  
Secondary Current ◽  
Current Distributions ◽  
Circuit Techniques ◽  
Model Equations ◽  
Current Modelling

An equivalent circuit for an annular porous electrode is derived by reinterpreting the differential equations that approximate the distribution of voltage and current in such electrodes. The equivalent circuit is shown to provide useful physical interpretations of the secondary current distributions. Multi-loop circuit techniques are employed to obtain the current distributions within the circuit. The solutions are shown to compare well with the exact solutions of the model equations. In addition, the equivalent circuit approach is used to investigate the effect of curvature on the degree of polarization of the electrode.

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