Re: Charging inductors for resonant charging

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

Original poster: "gtyler" <gtyler-at-drummond-dot-org.za> 

This would be the size of a 2Kw transformer.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, January 30, 2004 6:33 AM
Subject: Re: Charging inductors for resonant charging


 > Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
 >
 > Hi Jim,
 >
 > On 29 Jan 2004, at 17:52, Tesla list wrote:
 >
 >  > Original poster: Jim Lux <jimlux-at-earthlink-dot-net>
 >  >
 >  > At 08:01 AM 1/29/2004 -0700, you wrote:
 >  > >Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >  > >Tesla list wrote:
 >  > > >
 >  > > > Original poster: Jim Lux <jimlux-at-earthlink-dot-net>
 >  > > >
 >  > > > What sort of sources are there for a 5-15 Henry charging
inductor
 >  > > > for a resonant charging circuit? RMS current would be in the
1-2
 >  > > > Amp range.
 >  > > >
 >  > > > Is this a "wind it on a MOT core" kind of thing?
 >  > >
 >  > >         I'm no a magnetics designer but that sounds like a HUGE
 >  > >         device to me!
 >  > >If the charging frequency was 120 Hz the reactance of the 5 henry
 >  > >choke would be about 3770 ohms and the voltage across it at 1 amp
 >  > >would then be 3770 volts.  If it is to pass 1 amp the wire size
would
 >  > >probably have to be around #22 even for intermittent operation,
and
 >  > >the resulting wire area would require a large core.  Real
designers
 >  > >step forward?
 >  >
 >  >
 >  > So then, what ARE people using for charging chokes in resonant
 >  > charging systems..
 >
 > Anybody running a Tesla coil from a ballasted transformer is running
 > a resonant charging system, a lot without realizing it I daresay.
 > Whether the system is resonant at mains frequency depends on the
 > component values of course but unless the system is heavily damped,
 > there would undoubtably some degree of resonant charging present.
 > In the case of a welder on the primary side of the transformer, its
 > mH-range inductance is transformed up to the Henries range on the
 > secondary side. Not quite the same thing as putting a discrete Henry-
 > range inductor on the secondary side since where the inductor is on
 > the primary side, the transformer has to withstand an extra voltage
 > burden across both its primary and secondary windings for any degree
 > of resonant charging.
 >
 > Malcolm
 >
 >
 >