Re: Suggestion on Power Supply?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Christoph Bohr by way of Terry Fritz <teslalist-at-qwest-dot-net>" <cb-at-luebke-lands.de>

Hi!

this thread really brought up new insight into the topic to me, but araised
one further question.

I'm using a 30nF tank cap with a 200BPS async rotary ( BTW for those who
remember, I just cant get that darn thing to sync....probably I removed too
much material from the rotor but works not too bad this way )

referring to that formula from richie burnetts homepage:
http://www.richieburnett.co.uk/rotary.html

P = 0.5 x BPS x C x Vē

Is it right that I can only get a power throughput of ca 450 Watt at 10KV
that way? Or am I messing up the units and it should be 4500Watt?

from the reading of my amp-meter it should be something like 450Watt.
My power supply should be able to deliver around 10 to 20 times more, but I
think with that cap and 200 BPS I can't put more power through the system.
Just wanted to be sure before messing around with my rotary......

I know my lack of math knowledge must really hurt, but please help me anyway
;-)

Thanks in advance.

Christoph



----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, May 06, 2003 4:02 PM
Subject: Re: Suggestion on Power Supply?


 > Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<FutureT-at-aol-dot-com>
 >
 > In a message dated 5/5/03 9:44:49 PM Eastern Daylight Time,
 > tesla-at-pupman-dot-com writes:
 >
 > >John, thanks for clarifying... I didn't think your
 > >formula had much to do with BPS at all, simply
 > >what happens in ONE shot.
 >
 >
 > Jeremy,
 >
 > You bring up an interesting point.  In my tests, I used
 > break rates from 30 bps to 1000 bps or so.  At 30 bps,
 > the output spark length was quite short and didn't come
 > anywhere near the predicted lengths.  At 60 bps however
 > the coil performed close to the predicted lengths.  I concluded
 > that such low breakrates of 30 bps or lower do not keep the
 > arc streamer channels hot enough to maintain spark growth,
 > at least in the coil setup I was using.  I know that the spark
 > length can be maintained at much lower breakrates however in
 > some tube coil designs.  My formula was simply based on
 > observed spark lengths of various coils.  At the relatively
 > low power levels I worked with, 120 bps gave better "efficiency"
 > than higher or lower breakrates did.
 >
 > John
 >
 >
 >
 >