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Re: Induction heating in torroid / short circuit of secondary
Here is a thought on the subject:
A "shorted" toroid constitutes a single shorted turn adjacent to the
secondary. There will be a circulating current in it but the power it
might subtract from the system will be very small since its resistance is
very low ((I^2)R--remember?). Its only deleterious effect might be to
set up its own magnetic field that would be in opposition to the field of
the secondary--tending to push aside that latter field. Apparently that
doesn't happen to any great extent, or else if it does, it doesn't matter
all that much, at the top end of the secondary coil where that magnetic
field is the weakest. Or else--the field tending to be pushed aside
merely "sneaks out" between the secondary and the toroid. That it might
be deflected from passing completely thru the toroid is of no
consequence, of course, since the purpose of the toroid is not at all to
act as a part of the transformer per se.
And by the way, everyone--and please no one take offense: It's "toroid"
with 1 "r" and it's "dielectric" with an "e" and not an "a". Sorry--I
can't help it!
Ken Herrick
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