"Clare Snyder" wrote in message
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I have some axial field servo motors. They have a magnetizing loop
(#14 wire)-that they sharge with a capacitoe to top up the feild
after
they are assembled because without the small gap the magnets cannot
hold a full field (apparently they quite quickly drop to about half
strength if you dissassemble the motor) They hit that coil with
close
to 1000 amps for a millisecond or so to do the deed.

How do they keep the LC circuit from oscillating? If it's a clamp
diode I'm curious which one they chose to handle 1000A. The energy it
converts to heat is 0.5CV^2.

Some components such as diodes and breakers have a one-time surge
rating tht's far above their normal operating current but AFAIK they
aren't normlly tested for it in production, as it may degrade the
part.

http://www.cooperindustries.com/cont...ing_Rating.pdf