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Re: Paralleled Primaries / Separate Drive Circuit - SSTCs ? ? ?
Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
On 18 Sep 2003, at 3:37, Tesla list wrote:
> Original poster: dhmccauley-at-spacecatlighting-dot-com
> > >Has anyone explored the use of paralleled primaries in SSTC use.
> > >
> > >For example, say I had two SSTC full-bridge power supplies each with
> > >their own dedicated primary winding and of course both supplies
> > >switching frequency are synchronized. Now i take those two independent
> > >windings and use them either interweaved, or top/bottom configurations
> > >and run both at the same time.
> > >
> > >Neglecting losses, I would assume that two 5kW power supplies combined
> > >like this would appear like one 10kW supply to
> > >the secondary coil. Is this correct???
> > Yes!
> > >If so, perhaps this is a way to increase power even more to a SSTC when
> > >the maximum impedance of one coil limitations
> > >are met.
> > The only caution I would have is that the two primaries will strongly
> > couple to each other. Thus, you need to open circuit one while the other
> > fires.
> > Cheers,
> > Terry
> Does this really matter though? Most filament transformers have two primary
> windings which can be either paralleled for higher current, or series'd for
> higher voltage.
> The coupling between those primaries doesn't seem effect them at all. What
> do you think?
The point is that your supplies are effectively connected together
and if the phasings don't match, they will be working against each
other. Sort of like applying a short circuit to each other.