Re: H bridge RSG

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

Original poster: "LWRobertson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <LWRobertson-at-email.msn-dot-com>

Hi Luc and list

I did send it to terry-at-hot-streamer-dot-com. The one called
H-bridge.gif has a mistake in the cap size, sorry. H-bridge1.gif
is correct. The smaller caps in H-bridge.gif work well
with two 15/60 NST's.

http://hot-streamer-dot-com/temp/H-bridge1.gif

LR



----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, May 20, 2001 8:26 PM
Subject: Re: H bridge RSG


> Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<ludev-at-videotron.ca>
>
> Hi LR
>
> Please send your schematic to terry-at-hot-streamer-dot-com and inform
> the list after, I'm really interest, Tx.
>
> Cheers,
>
> Luc Benard
>
> Tesla list wrote:
> >
> > Original poster: "LWRobertson by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
> <LWRobertson-at-email.msn-dot-com>
> >
> > Hi Ray and Steve
> >
> > A classic coil discharges at some voltage, then
> > the RF oscillates around zero, approximately. The
> > H-bridge never stops at zero, but goes straight
> > from +V to -V, and oscillates there, adding the
> > RF amplitude to the DC voltage.
> >
> > Advantages are very reliable firing, it will never
> > power arc, and the primary voltage is doubled,
> > adding some oomph. I would think it should work
> > well for MOT power supplies. It can be run at any
> > speed.
> >
> > The disadvantages are the necessity for a largish
> > storage capacitor, also rated for RF; and the huge
> > voltage reversals, probably +2V to -2V almost.
> >
> > At the moment its running on a 8 inch rotary with
> > a maximum of 240 BPS. I'm (slowly) getting parts together
> > for a 12 inch which should be good for 360 BPS,
> > and ultimately hope to make a 22 inch with 24
> > electrodes. Expensive, though.
> >
> > Its a simple enough circuit - I'll be glad to send a
> > schematic if you want.
> >
> > LR
> >
> >   ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Saturday, May 19, 2001 9:25 AM
> > Subject: H bridge RSG
> >
> > > Original poster: "Ray Haynes by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
> > <ray.haynes-at-home-dot-com>
> > >
> > > I'm moving full speed on my MOT powered DC coil and was searching the
> > pupman
> > > archives (that's what they're for, right? ;-) ) for information. I
found
> > > postings about an H bridge RSG. There were some comments about how
that
> > > approach charged the cap with alternate polarities and that this might
be
> > > hard on the cap. I didn't see any resolution on that.
> > >
> > > Question (rhetorical?):
> > > Since the tank cap forms a resonate circuit with the primary and
resonate
> > > circuits oscillate back and forth charging the cap first one way then
the
> > > other, doesn't that mean all caps used in the primary tank circuits
must
> > be
> > > happy with AC charging? Also this seems to indicate that the
alternating
> > > charge cycles of an H bridge RSG are not a problem, true?
> > >
> > > Ray
> > >
> > >
> > >
>
>
>