From: muratlanne@gmail.com   
      
   "Joe Gwinn"  wrote in message   
   news:0os28k59qdiq3bpm48osj752st7p2fd72q@4ax.com...   
   >How long does it take?   
   -----------------------------------   
   The superconducting coil is a large inductor that stores up to a few   
   kilowatt-hours of energy in its magnetic field, like a spinning flywheel.   
   De-energizing an MRI magnet requires dissipating energy comparable to   
   discharging a trolling motor battery or cooking a meal. Also inserting   
   resistance into the coil creates an IR drop voltage the coil's insulation   
   must withstand.   
      
   The closest I've come was building a machine for GM that simulated releasing   
   the energy in an alternator rotor's magnetic field if the battery cable   
   disconnected. The model was a corroded connection and a bumpy road that   
   caused rapidly repeating load dumps.   
   https://en.wikipedia.org/wiki/Load_dump   
      
   As I watched my machine melted their surge protection after a few cycles. I   
   think the result was the change to side terminals.   
      
   https://www.mgexp.com/forum/other-vehicles.69/gms-absurd-side-po   
   t-batteries.2305264/   
   "You know that the reason for the side post terminal was to prevent the   
   corrosion which was a part of most top terminal installs after a few years.   
   Side terminal batteries seldom have terminal corrosion issues in my   
   experience."   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)