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Re: DC drive
---------- Forwarded message ----------
Date: Tue, 7 Oct 1997 07:50:38 -0400
From: Thomas McGahee <tom_mcgahee-at-sigmais-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: DC drive
----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: DC drive
> Date: Monday, October 06, 1997 11:49 PM
>
>
>
> ---------- Forwarded message ----------
> Date: Mon, 6 Oct 97 06:26:45 UT
> From: Larry Robertson <LWRobertson-at-classic.msn-dot-com>
> To: Tesla Builders <tesla-at-pupman-dot-com>
> Subject: DC drive
>
> Greg and all ...
>
> The only way to view this is with
> a Monospaced font.
>
> ________ ________
> ________| | | |________ +
> | Diode |___| RF | ___
> | Bridge | | Filter | ___ 2uF storage cap
> 15 kV | | | | |
> AC | | | | |
> ________| |___| |--------- -
> |________| |________|
>
>
> + __________________
> | *
> | ----* * *-------- 0.05 resonance cap
> - --------- | |------| |------
> | ---* *--------* *------ |
> | | Primary
> |_______ * * *--------| 0.05 |
> *-------------|------| |------
>
> I realize this is not exactly 100% wonderfully
> clear, but let me describe what I think will happen.
> The stars above represent the electrodes on the RSG.
> The + and - on the bottom drawing are continued from the
> + and - above.
>
> There are 4 electrodes on the rotor - the electrodes at
> 0 and 180 degrees are connected togeather and insulated
> from the electrodes at 90 and 270, also connected togeather.
>
> In the position shown, the resonance caps will be charged
> + on the bottom, - on the top when the gaps fire. After
> rotating 45 degrees, the resonance caps will be charged
> - on top, and + on top when the gaps fire.
>
> I am only calling them resonance caps because in each
> presentation all 3 caps are in series but the big 2 uF
> cap is not changing the resonance picture much,serving
> as an energy reservoir to recharge the smaller caps
> in the opposite polarity.
>
> In a way this is sort of like a 2 stage Marx bank, at
> least from the point of view of the primary,
>
> Does this make any sense at all? The only downsides
> I have thought of is if the resonance caps fail all of
> the energy in the storage cap will dump into the short,
> possibly creating some excitement.
>
> Theorising in Morgan Hill
>
> LR
>
Larry,
Am I missing something here? How is the tank circuit going to
OSCILLATE? In a classic TC circuit the gap firing forms a complete
circuit in which the tank current can oscillate back and forth. But
in this circuit the gap firing does *not* complete the primary/cap
circuit... it also includes the big DC cap which at this moment is
still partially charged. Won't this have an effect on the resonant
caps discharging in an oscillatory way (changing polarity, in other
words)?
Fr. Tom McGahee