Re: Paralleled Primaries / Separate Drive Circuit - SSTCs ? ? ?

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

Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz> 

On 18 Sep 2003, at 19:16, Tesla list wrote:

 > Original poster: dhmccauley-at-spacecatlighting-dot-com
 >
 >  >  >  > 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?
 >  >  >
 >  >  > Dan
 >  >
 >  > 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.
 >  >
 >  > Malcolm
 >
 > This is why I stated that in my original email that both driver circuits
 > would be synchronized.  In fact, I would even be using adjustable delay
 > lines on each board to account for all
 > propogation delays inherent in the connections between boards (for sync
 > pulses that is) so that the outputs can be matched to +/- 50ns or better.
 >
 > Dan

The only thing you'll achieve by using separate coils is DC isolation
between the drivers. Is that the goal?

Malcolm