RE: MOT supply

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

Original poster: "Pete Komen by way of Terry Fritz <twftesla-at-qwest-dot-net>" <pkomen-at-zianet-dot-com>

Hello Mark and Greg,

Excuse me for butting in...  Two half cycles to charge the caps gives one
size 2X bang per cycle for the voltage doubler versus 2 size 1X bangs per
cycle for the standard AC TC.  Gives essentially the same energy per cycle.
I don't know which more efficient.  Which suggests yet another research
area.

Pete Komen

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, January 04, 2002 6:03 PM
To: tesla-at-pupman-dot-com
Subject: Re: MOT supply

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<A123X-at-aol-dot-com>

I'm probably going to go with an async rotary since I already have an angle
grinder and G-10 disk with proper holes in it. There's one thing I don't
quite
understand, If the circuit works by storing up the energy from the first 1/2
cycle then releasing it with the second 1/2 cycle then shouldn't that put
out
twice the power just half the amount time?

Mark


In a message dated 1/4/02 2:50:24 PM Eastern Standard Time, tesla-at-pupman-dot-com
writes:


>
> Mark,
>
> The low voltage, high current approach you are
> contemplating is workable, but it's a tough way to go.
> I also think .75uF is an unrealistically large tank
> cap value. I'd shoot for something more in the .1-.2uF
> range.
>
> If I get a vote, I think the voltage doubler approach
> would make your life simpler. With 8kvac to play with,
> you could use a simple sucker gap and still get
> adequate quenching. You could also use a more sensible
> tank cap size.
>
> Wattage doesn't change when you use the doubler.
> Voltage goes up, but current goes down, so the overall
> power stays roughly the same. What the half-wave
> voltage doubler will do for you is "save up" energy
> for half a cycle, then dump it all at once in the next
> half cycle. For a glorious half-cycle, the TC tank
> "feels" like it's getting twice the juice! (That's my
> half-baked theory, anyway). During "dead time", when
> the doubler caps are recharging, the TC tank is shut
> down for a whole half-cycle. This interuption of the
> current virtually eliminates the possibility of
> runaway power arcing with any sensible spark gap.
>
> My $0.02
>
> Best Regards,
>
> Greg
> http://hot-streamer-dot-com/greg