Re: Saturable Reactors (was Ganging 1256D's)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <mystuffs-at-orwell-dot-net>

john,
check out:http://www.tpub-dot-com/neets/book8/32m.htm (follow NEXT)
i was messing around with a small saturable reactor made out of two mot
cores placed end to end with 30 turns of 4g on each old mot secondary
opening and the control winding wound around and through the two old
primary openings. it seemed as it would have worked great if i could
have ever got the control winding power under, control?
i never could get it to stay at a steady current.
i started thinking, after asking a few questions to the list, that the
core area wasn't large enough. then i started looking at the huge cores
of large 1000 watt high intensity discharge ballast's, much bigger cores
to be placed end to end as i did the mot's giving the three legs. even
the smaller 400 watt HID cores are massive compared to an mot and
sometimes these are tossed with the light because sometimes it's just
cheaper to buy a new light then to change a ballast. 
http://www.hilltech-dot-com/ballst.html
shows some very interesting saturable designs for ballast's with even
one that uses a resonant tank circuit to keep the lamp winding in a
controlled magnetic saturation. i gave this a little thought as a self
controlling saturable reactor where the currents could be changed by
tapping in or out of the capacitors.
http://www.neeltran-dot-com/saturabl.htm
has some massive commercial sat. reactors and some nice literature on
request.
marc m.