Multiple coil field math for magnetic train

AI Thread Summary
Calculating the inductance and field strength of coils in a magnetic train setup involves understanding the interaction between multiple coils as they turn off. The rapid change in magnetic permeability, especially at high magnetic fields exceeding 7 teslas, complicates the inductance calculations. Acceleration of the coil deactivation process may be achievable through specific circuit designs or materials. Key equations for inductance change in this context are essential for accurate modeling. Resources or links to relevant equations would be beneficial for further exploration of these calculations.
pixelpuffin
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i need to know how to calculate the inductance and field strength of a coil while another coil directly beneath it is turning off and coils under that are also turning off
i also need to know how quickly the coils will turn off and if i can accelerate the process
if it makes a difference the coils are very flat (5 cm long and 1000 cm across)
links are quite appreciated too

i almost forgot the permeability of the material within the magnet will be changing and the magnets will be past 7 teslas which likely complicates things
 
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what i need the most here is the inductance change so if anybody knows that i would like an equation or a link to an equation
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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