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Multiple coil field math for magnetic train

  1. Nov 21, 2013 #1
    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
    Last edited: Nov 21, 2013
  2. jcsd
  3. Nov 22, 2013 #2
    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
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