Re: IGBT's, pulsed power (was Re: Waveguide TC)

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>

Okay.  I know Terry kills my threads a lot for being offtopic, but this is
getting ridiculous.  I fail to see how this has *anything* to do
with tesla coiling.

Dan




 > I'll bet Greg meant 360 MW...
 >  >>8000 pulsers at 75 MW pulsed each.. 3 microsecond pulses
 >  >> Each of the 1000 or so modulator stations needs to generate a
 > 500kV, 2000A, 3uS pulse, at 120BPS.
 >
 > That's a 1 GW pulse lasting 3 uS , or 3 kJoule/pulse, repeated at 120
 > pulses/second is 360 kW per modulator
 > 1000 modulators is 360 MW...
 >
 > Given that the "wall plug efficiency" is probably something around 60-70%,
 > you're looking at a cool 1/2 Gigawatt to run that baby..
 > But gosh, that's only 800-900 Amps per phase on the 275 kV line feeding
in,
 > right?
 >
 > Other high power sources that might be interesting..
 > Goldstone Deep Space Network has a 400 kW S band (2-3 GHz) transmitter
 > (continuous, not pulsed) for spacecraft commanding and radar
 > Arecibo has (or is upgrading to) a 1 MW transmitter (Probably continuous,
 > since they do planetary imaging)
 > There's a big radio station just south of the Texas border that has a 1MW+
 > transmitter (that's not EIRP folks.. that's the power to the feed network)
 >
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Sunday, December 15, 2002 12:34 PM
 > Subject: Re: IGBT's, pulsed power (was Re: Waveguide TC)
 >
 >
 >  > Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
 >  >
 >  > Hi,
 >  >
 >  > 360 MW will light a good sized city.  A 360MW generating station would
put
 >  > a good spot and the map as would the coal strip mine to run it :o))  I
 >  > "think" Greg meant like 360kW or maybe only 360W  ;-))
 >  >
 >  > Cheers,
 >  >
 >  >          Terry
 >  >
 >  >
 >  >
 >  > At 02:24 PM 12/15/2002 -0500, you wrote:
 >  > >Keep in mind, most facilities using very high powered equipment like
this
 >  > >have additional generators on site
 >  > >to convert loss energy (such as heat etc...) back into electricity
which
 >  > >they then sell back to the power company.
 >  > >
 >  > >Dan
 >  > >
 >  > >
 >  > >
 >  > >
 >  > > > 360 MW is still a heap o' juice, though... at $0.10/kWh, it's going
to
 >  > >cost
 >  > > > $36000 per hour.. Presumably they don't plan to run the thing when
 > spot
 >  > > > rates are high...
 >  > > >
 >  > > > ----- Original Message -----
 >  > > > From: "Tesla list" <tesla-at-pupman-dot-com>
 >  > > > To: <tesla-at-pupman-dot-com>
 >  > > > Sent: Sunday, December 15, 2002 9:06 AM
 >  > > > Subject: Re: IGBT's, pulsed power (was Re: Waveguide TC)
 >  > > >
 >  > > >
 >  > > >  > Original poster: "Greg Leyh by way of Terry Fritz
 > <twftesla-at-qwest-dot-net>"
 >  > > > <lod-at-pacbell-dot-net>
 >  > > >  >
 >  > > >  > Sorry, I didn't denote that the 75MW is the *peak* output
 >  > > >  > rating of the klystron.
 >  > > >  > The duty factor here is *extremely* low -- the total site
 >  > > >  > power should average less than 360MW.
 >  > > >  >
 >  > > >  >
 >  > > >  > >Original poster: "W.R. Langston <blangsto-at-iwvisp-dot-com>
 >  > > >  > >
 >  > > >  > >"8000 (or so) 75 MW..." plus significant losses I presume; so,
 > whose
 >  > >what
 >  > > >  > >is powering this set up?
 >  > > >  > >>
 >  > > >  > >>
 >  > > >  > >>SLAC is engaged in the machine design of many subsystems
 >  > > >  > >>for the Next Linear Collider, including the pulsed power
 >  > > >  > >>modulators that will feed the 8000 or so 75MW x-band
klystrons.
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