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Re: High Power SSTCs - Need help and opinions
Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
On 16 Sep 2003, at 17:10, Tesla list wrote:
> Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com>
> After doing a considerable amount of work with flea powered SSTCs such
> as the PlasmaSonic SSTC and my high frequency
> tweeter system (which is still ongoing), I'm ready to sit down and build
> a monster SSTC capable of operating at many
> kilowatts and hopefully put out huge, thick, and nasty output streamers.
> I have a large budget allocated for this
> winter project so if it takes $2000 worth of high performance FETs, so
> be it. But I want it to be nasty beast of a
> There are currently two routes which are both difficult in their own
> 1) Maximize output power utilizing maximum primary voltage waveforms
> (Primary difficulty is switching high voltage switch with solid state
> 2) Maximize output power utilizing maximum primary current waveforms
> (Difficulty in maximizing primary impedance and current handling
> capabilities of solid state devices)
> I would like to use option number 2 and maximize the primary current. I
> already believe Justin and Aaron have done
> considerable work in this area. My questions are:
> A. There has to be some limit to the amount of turns one can place on
> the primary when trying to lower the impedance
> of the primary to maximize primary current. Once this limit is reached,
> what other alternatives are there for lowering
> this impedance even more.
Low impedance = low frequency in combination with low inductance.
> B. Will building a rather large primary / secondary coil system result
> in even lower primary impedances??? Obviously, thicker wire will have a
> lower impedance, but what about coupling between coils?
> Throw out any and all opinions, comments, you can. I do want to build a
> SSTC capable of 10kW+. Its going to be a challenge (plethora of snubber
> circuits, transmission line designed gate drivers, FDFI, etc...), but it
> will be fun!