Re: drsstc

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

Original poster: "Jan Wagner" <jwagner-at-cc.hut.fi> 


On Thu, 21 Oct 2004, Tesla list wrote:
>Original poster: "Bob (R.A.) Jones" <a1accounting-at-bellsouth-dot-net>
>>Original poster: "Jan Wagner" <jwagner-at-cc.hut.fi>
>>
>>Here's a paper from IEEE that has some calculations on power and current,
>>that you could also use as a starting point:
>>
>>    http://www.hut.fi/~jwagner/electr/tmp/01296120.pdf
>
>
>I don't understand this paper.
>
>A 1.5kV about 100uF cap that dissipates almost most 0.5MW at 5kHz at
>1.5kVpk that's 6,000A
>
>What are they using, salt water bottle caps with the sea water pumped thru
>to cool them!! LOL

Well the capacitor doesn't appear to have low ESR exactly ;)
They used Z_esr as Z_esr = R_esr = k/C = 1.35E-4 ohm/F / 126E-6F ~= 1.1 ohm 
so that'd explain why they end up with calculated 68% efficiency only, 
instead of in the 90% range. Granted, there are capacitors with water 
cooling and all that, but 1/2 megawatt dissipation, umm yeah... The rest of 
the paper seems quite ok, though.

>Just to stay on topic it would make a large SSTC  with 1MW cont. output.
>A curious configuration too parallel tuned circuit with an inductor in the
>DC power line.

Looks nearly like a parallel-resonant OLTC ;)

cheers,
  - Jan

-- 
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  Helsinki University of Technology
  Dept. of Electrical and Communications Engineering
  http://www.hut.fi/~jwagner/ - jwagner-at-cc.hut.fi