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Re: NST/OBIT current limiting (fwd)
---------- Forwarded message ----------
Date: Thu, 18 Dec 1997 17:48:38 MYT
From: Sulaiman Abdullah <sulabd-at-hotmail-dot-com>
To: tesla-at-pupman-dot-com
Subject: Re: NST/OBIT current limiting (fwd)
Hello, I've been 'playing' with my 15kV 30mA NST and mine seems to
behave like 7.5 - 0 - 7.5 kV with 10.5 kOhm resistance and 800 Henrys
of inductance in each leg.
My NST is rated for 230v 50Hz and draws 2A rms typ. (no
'resonant-charging etc.) and the core begins to saturate at 240v rms.
Treat an NST as a normal transformer with HUGE secondary leakage
inductance.
BTW for my NST using resonant charging ( Cp = 6n4) the theoretical Q
is 12 including 2 x 10kOhm ballast resistors, 12 x 15kV rms = 250 kV pk.
>Date: Wed, 17 Dec 1997 14:34:25 -0700 (MST)
>To: tesla-at-pupman-dot-com
>Subject: NST/OBIT current limiting (fwd)
>From: Tesla List <tesla-at-pupman-dot-com>
>
>
>
>---------- Forwarded message ----------
>Date: Wed, 17 Dec 97 12:34:20 -0500
>From: Adam <absmith-at-tiac-dot-net>
>To: tesla list <tesla-at-pupman-dot-com>
>Subject: NST/OBIT current limiting
>
>
>Does anybody know how the current limiting on an NST or OBIT varies
with
>output voltage? For example, when I crank the variac to 140V, does the
>current increase from the rated value also? What happens at saturation
of
>the core?
>
>I am quite curious as to the nature of the limiting mechanism, since
I've
>never seen any curves for the output.
>
>-Adam
>
>--------------------------------------------------------------------------
>Adam Smith
>absmith-at-tiac-dot-net
>Epoch, Inc. Digital Music Project
>
>www.tiac-dot-net/users/absmith/ MP3 Demo Tracks Now
Available!
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