Re: Pig PFC (was Re: Inductive Kick LTR Pig Systems)

["Malcolm Watts" <M.J.Watts-at-massey.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Ed,

On 28 Aug 00, at 20:39, Tesla list wrote:

> Original poster: "Ed Phillips" <evp-at-pacbell-dot-net> 
> 
> Tesla list wrote:
> > 
> > Original poster: "Malcolm Watts" <M.J.Watts-at-massey.ac.nz>
> > 
> > Hi all,
> >          After putting my foot in my mouth already on this
> > subject I am satisfied in my own mind that the sole purpose of
> > PFC for a pig is to cancel the primary magnetizing inductance
> > in the transformer. The ballast and primary cap should be self-
> > cancelling if the charging is mains resonant. A crude model of
> > the transformer is that of an ideal transformer with its
> > primary shunted by a magnetizing inductance (Lp). In other
> > words, PFC for a pig sounds like a jolly good idea.
> > 
> > Malcolm
> 
> 	One would think that the PFC should go on the line side of the ballast.
> 
> Ed

Agreed. And it probably is a dynamically varying (with load) 
quantity that is required.

Regards,
Malcolm