Re: H bridge RSG

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

Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ludev-at-videotron.ca>

Hi LR

Tx for posting the schematic. Very interesting concept, if I
understand, the tank cap is equivalent to .0486 uF and I
understand why it could not power arc, but why the storage cap
don't stop the oscillation right away, do you have a simulation
on microsim or a scope reading, I have difficulty to figure the
wave form and comportment of the oscillation.

It's now on my list of thing to try If I can find the right cap
for storage, it's not gona be cheap :-((

Tx again,

Luc Benard

P.S. Do you have a web site with more on this subject ?  

Tesla list wrote:
> 
> 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
> > > >
> > > >
> > > >
> >
> >
> >