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Re: 18,000. AMP high energy Cap bank

Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>

Hi Bob,

On 17 Dec 2004, at 8:03, Tesla list wrote:

> Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>
>
> Hi,
>
> Subject: RE: 18,000. AMP high energy Cap bank
>
>
>  > Original poster: "Tom Luttrell PWRCOM" <tom@xxxxxxxxxxxxx>
>  >
>  > We use an Ion Physics Corporation CM-1-L current transformer
>  (0.1V/A > into 50R) to measure up to 50kA. We've also go a 100kA
>  version somewhere > but I couldn't find it to get the part number. >
>  > The soucre impedance will control the short circuit current. >
>
> At these current levels and presumably fast pulses there is no such
> thing a short circuit.
>
> The current level will be determined by the total resistance and
> inductance of the circuit. To avoid voltage reversal on the cap the
> circuit should be at least critically damped. Off hand but I think
> that's a Q of one.

It's actually 0.5.  You can derive it from the free resonance formula
by setting the frequency (LHS) to zero (no oscillation).

Malcolm

If you do a google for the design of flash tube
> discharges circuits you should get all the required formula. If
> nothing else make certain there is sufficient R to limit the current
> to the max value. You can estimate the inductance by assuming its
> equivalent to a single turn with an area the same as the circuit loop.
>
> Bob
>
>
>