[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: DC powered Coil single phase 14.4KV 5KVA pig DCPTC ?-)
- To: tesla@xxxxxxxxxx
- Subject: Re: DC powered Coil single phase 14.4KV 5KVA pig DCPTC ?-)
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Fri, 25 Mar 2005 08:29:13 -0700
- Delivered-to: email@example.com
- Delivered-to: firstname.lastname@example.org
- Old-return-path: <email@example.com>
- Resent-date: Fri, 25 Mar 2005 08:30:53 -0700 (MST)
- Resent-from: tesla@xxxxxxxxxx
- Resent-message-id: <DtNRED.A.W-B.r6CRCB@poodle>
- Resent-sender: tesla-request@xxxxxxxxxx
Original poster: tesla@xxxxxxxxxxxxxxxxxxx
> Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
> The cap recharge cycle is so rapid that the movement of the spark gap
> electrodes is essentially a moot point. All you need is adequate current
in a gap setup as SPDT and a constant DC supply of power, you can run at
almost any break rate. That's what I'm after. You need a decent sized
filter cap, but they exist.
> insure the rapid recharge. DC system not really necessary unless you are
> running 3 phase power. A lot of extra work, time, and money with no real
Tesla Coil projects are all about burning time and money with no real gain.
> Dr. Resonance
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Thursday, March 24, 2005 5:07 PM
> Subject: Re: DC powered Coil single phase 14.4KV 5KVA pig DCPTC ?-)
> Original poster: tesla@xxxxxxxxxxxxxxxxxxx
> This has been my approach. I like the idea of being able to fire the gap
> anytime I want, and not having to wait around for the 60Hz cycles to be
> lined up just right. Proof that this is a big deal is that people use
> synchronous spark gaps.
> I don't see the point to ballasting with a DC power supply either. The
> tank circuit of a tesla coil can be isolated from the power supply with
> extra contacts on a sparp gap. With this, there's no dead shorts across
> the power supply and no need to try to battle this. I've done this with an
> AC coil, but without the rectification and filtering of the power to the
> coil, there's really no point to trying to use variable break rates on
> your spark gap.
> I kept blowing out diodes, even with two 15kV 30mA transformers. There's
> apparently lots of ugly ringing that destroys them pretty fast.
> I've run out of space to work on my DC coil for the time being. I'v got
> some compensated-like recitifier stacks and a tube of fast, and fast
> avalanche rectifiers to try out. There will be lots of blue smoke fun when
> I clear some space to work in again.
> > Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
> > Greeting All,
> > I am considering building a full wave rectified and filtered DC supply
> > enjoy the perceived luxury of have a variable speed RSG. Materials on
> > hand:
> > 14.4KV @ 5KVA Pig, 250 amp arc welder ballast, Powerstat (1256d
> > 7500
> > VA max) for power up. Proposed is to wire the Powerstat between the
> > and the series ballast. I purchased (24) stackable 7500v 1.4amp diodes
> > from
> > alltr. planning on stacking six per leg for the bridge. I plan to
> > the
> > Center tap and ground the transformer. I seem to remember varying
> > on whether this should be done to Mains or RF ground. I have a typical
> > X
> > 36" coil and numerous pulse capacitors but my present focus is on the
> > Power
> > Supply. I don't plan on ever running past 500ma out. Open for
> > are
> > filter cokes, charging inductors, and of much concern Protection of
> > Bridge or it's robustness for that matter.
> > I'm a signal level guy. For starters what is an appropriate filter
> > capacitor
> > and suggested sources and should it be preceded by a filter choke? It
> > would
> > seem that multiple smaller Caps would be safer then one big boomer.
> > forward to the list if the thread would be of interest to the group.
> > Thanks Much,
> > Jim Mora
> > Fillmore School District, Retired
> > Ojai, Ca.