Re: Inductive Kick LTR Pig Systems

["Robin Copini" <rcopini-at-merlin-dot-net.au> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Terry, all:


Tesla list wrote:

> Original poster: Terry Fritz <twftesla-at-uswest-dot-net>
>
> Hi All,
>
>         I was plugging away at a few Inductive Kick Larger Than Resonant
designs
> with pig transformers with MicroSim.  I can fairly easily charge a 270nF
> cap to 20.3kV at 120BPS while staying inside the "specs" of everything.
> However, that is only:
>
> 1/2 x 270x10^-9 x 20300^2 x 120 = 6676 watts
>
> for 10kVA input.  The problem is the power factor is really bad!  Do people
> use PFC caps with pig systems??  I assume the "limit" of such a system is
> the AC line current available.  PFC caps may do wonders for getting more
> bang for the same current.  PFC cap could easily pull that power factor
> right in.

This is exactly where I am at the moment, my transformer is a 33kv/15KVA
rated unit
(AUS 240V/50Hz in), I have 3 legs available each sub-board rated at 100
amps but can
go to 300 amps on the main board. The system specs at the moment are 200bps
sync
rotary, 0.06uf mmc, variac current limiting.  At 100 amps from supply I am
still
only charging the cap to 60-70% of full capacity. I am going to  introduce
a PFC cap
into the system to improve the charging capacity on the supply side. Your
discussion
about inductive kick on pig systems has piqued my interest. Any suggestions?

Best Regards

 Robin Copini.




>
>
> IK LTR Pig Systems (IKLTRPS) seem very interesting since we can change the
> ballasting and get over a rather obnoxious tuning parameter that cannot be
> adjusted on NST systems...