Transient ULF Electric and magnetic fields of an electrical current source in a medium with continuously varying conductivity

1977 ◽  
Vol 115 (3) ◽  
pp. 607-622
Author(s):  
Shogo Kozaki
Keyword(s):  
Magnetic Fields ◽  
Current Source ◽  
Electrical Current ◽  
Electric And Magnetic Fields

scholarly journals Return Stroke Process Simulation Using TCS Model

2021 ◽  
Author(s):  
Fridolin Heidler
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Current Source ◽  
Temporal Distribution ◽  
Reflection Factor ◽  
Return Stroke ◽  
Lightning Current ◽  
Electric And Magnetic Fields ◽  
Source Current ◽  
Initial Peak

The Traveling Current Source (TCS) model describes the electrical processes during the lightning return stroke phase. The TCS model assumes that the lightning current is injected at the top of the increasing return stroke channel represented by a transmission line. The electric and magnetic field is calculated based on the spatial and temporal distribution of the lightning current along the return stroke channel. It is shown that the main characteristics of the measured electric and magnetic fields can be reproduced with the TCS model. These are the Initial Peak of the electric and magnetic fields for near intermediate and far distances, the Ramp (up to the maximum) of the near electric field, the Hump of the near magnetic field after the initial peak, and the Zero Crossing of the far distant electric and magnetic fields. The fundamentals of the model are presented, and the model is extended to consider the current reflections occurring at the ground and the upper end of the return stroke channel. To this end, the ground reflection factor ρ and the top reflection factor R are introduced. Due to the increasing return stroke channel, the top reflection factor is a function of the return stroke velocity. The total current is composed of the source current according to the TCS model and the reflected currents. It is shown that the ground reflection causes significant variation in the waveform of the channel-base current and the electric and magnetic fields.

49. Evaluation of Electric and Magnetic Fields Around an Induction Cap Sealer

1999 ◽  
Author(s):  
F. Rosenthal ◽  
M. Carter ◽  
S. Hampton ◽  
T. Mays
Keyword(s):  
Magnetic Fields ◽  
Electric And Magnetic Fields

Electric and magnetic fields at power frequencies

2010 ◽  
Vol 29 (Supplement 1) ◽  
pp. 69-83
Author(s):  
Anthony B. Miller ◽  
Lois M. Green
Keyword(s):  
Magnetic Fields ◽  
Electric And Magnetic Fields
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