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Another SSTC Question
Original poster: "Marry Krutsch by way of Terry Fritz <twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>
Hi everyone.
I'm trying to build a driver for my (future) MOSFETs, but I'm not sure
about a few things. I want to isolate the signal electronics from coil
driving electronics using a ferrite toroidal xfmr (that's the right
thing to do, right???). The problem is, I can't get a "good" clean
signal out of the transformer. Depending on the pulse width and
frequency fed to it, I get a bumpy output that ranges from positive to
negative (which I kind of expected, yet it isn't helpful). I know a
noisy signal is OK, as long as there's enough power to saturate the
MOSFETs.
Also, is it OK to run a SSTC with BiPolar transistors? I've got a ton
of them, and my previous futil attempts at a SSTC driver chewed up all
my MOSFETs and spat them out :-(. I actually toasted a 600v unit with
only 30v in, although I only had a power diode across the transistor for
"protection" (which probably helped little, if at all).
Have I got the right idea, or have I totally missed the boat? Please
help.
Stumped (as usual),
Winston K.