Re: BPS, J/bang, and spark length

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

Original poster: "Allanh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <allanh-at-starband-dot-net>

1800 KVA from a wall outlet, WOW!

allan

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, October 26, 2002 10:05 AM
Subject: BPS, J/bang, and spark length


>
> Original poster: "Daniel Barrett by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <dbarrett1-at-austin.rr-dot-com>
>
>     Hi all-
>
>     The spark length equasions for AC powered coils are pretty well
> developed, but the playing field is a little different for DC powered
coils:
> Lets say that we are constrained by the available power to running a DC
coil
> at 120V at 15A, or 1800 KVA. When designing a coil for such a power
supply,
> you can go one of two ways: Build a huge MMC and run at a low break rate,
or
> build a small MMC and run at a high break rate. My question is this: Which
> approach will lead to the best spark length?
>     On my coil, ferinstance, the spark length appears to increase as BPS
is
> increased (energy per bang stays constant) until the breaker pops. But
it's
> also likely that increasing the MMC size (read more energy/bang at less
BPS)
> will increase the spark length. So as I try to eak every last inch out of
a
> 120V wall outlet, which optimization route is likely to be "best"?
>
> A) keep my exisiting 6.5 J/bang MMC and run it at 277BPS (=1.8kVA)
> -or-
> B) increase my MMC to 15J/bang and run it at 120BPS (=1.8kVA)
>
> Any ideas appreciated-
> db
>
>
>
>