Re: Externally limited NST

• To: tesla@pupman.com
• Subject: Re: Externally limited NST
• From: "Adam" <adamsmith@mediaone.net> (by way of Terry Fritz <twftesla@uswest.net>)
• Date: Fri, 10 Mar 2000 21:41:31 -0700
• Approved: twftesla@uswest.net
• Delivered-To: fixup-tesla@pupman.com@fixme

> Original Poster: "Jim Lux" <jimlux@jpl.nasa.gov>
> 
> All the inductor does is put a lossless impedance in series, so the voltage
> on the load is reduced.  It matters not whether the impedance is capacitive
> or inductive.  As a practical matter, the inductors are easier to build in
> high current versions with low impedances.
> 
> For instance if you want something at 40 Amps for 240 V (just to take an
> example), you'll need an impedance of 6 ohms. For the inductor, this is .44
> mH, a reasonable value.  For a capacitor, you'd need 2262 Farad (!). [all
> at 60 hz]


I get 16mH and 442uF respectively (all at 60hz):

  Inductor:    2 * pi * 60 * 0.016  = 6 ohms

  Capacitor:    1 / (2 * pi * 60 * 4.42E-4)  = 6 ohms


442uF is not unreasonably huge at all.  FWIW, a 2262 farad cap would be
something like 1 micro ohm load.

-Adam
adamsmith@mediaone.net

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