Re: Any Interest in 30-40 kVA Power Supplies (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 5 Oct 2004 09:07:47 -0600
From: Gomez Addams <gomez@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Any Interest in 30-40 kVA Power Supplies (fwd)


On Oct 5, 2004, at 8:16 AM, High Voltage list wrote:

> Original poster: sroys@xxxxxxxxxxxxxxxxx
>
>
>
> ---------- Forwarded message ----------
> Date: Tue, 5 Oct 2004 07:09:37 -0600
> From: Gomez Addams <gomez@xxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Any Interest in 30-40 kVA Power Supplies (fwd)
>
>
> On Oct 4, 2004, at 8:43 PM, High Voltage list wrote:
>
>> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>>
>>
>>
>> ---------- Forwarded message ----------
>> Date: Mon, 04 Oct 2004 11:02:21 -0700 (PDT)
>> From: Peter Lawrence <Peter.Lawrence@xxxxxxx>
>> To: hvlist@xxxxxxxxxx
>> Subject: Re: Any Interest in 30-40 kVA Power Supplies (fwd)
>>
>> Carl,
>>      what you have here is "the mother of all coin shrinker"
>> capacitors,
>>
>> Joules = 1/2 * C * (V)**2,   so if my math is correct:
>>
>> 	1/2 * (2 * 10**-6) * (125,000)**2   =>   15,625 Joules
>>
>> do the web search yourself, but IIRC it takes 4000 to 8000 Joules to
>> shrink
>> a quarter.
>
> Except that these caps may not be designed for fast, very high current
> discharges.
>
> [Optimally ;-)  And yes, XRay filter caps aren't likely to be ultra-low
> inductance pulse caps.  But I imagine that if you whack anything with
> 15kJ, somethings going to give.

My point being that what gives might be the capacitor.  It's not just a
matter of low self-inductance.  The internal construction of the cap may
not be capable of handling very high current pulses.  And when very high
energy capacitors fail, it can be dramatic, even dangerous.

> A capacitance of 2uF seems a bit
> large for a coil though,

Yep.

> and the cable will have it's own, not insubstantial, capacity to add
> as well.  SRR]

  Not to mention the cable probably isn't optimum for high circulating
currents of a Tesla primary.