Re: PFC Question

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Ed,

I too believe the PFC's should not be in series but in parallel with 
the load.  However, placing then directly across the transformer IS 
correct for NST's where the limiting inductance is internal to the 
transformer.  But for PIGS, shouldn't the ballast inductor (assuming 
primary ballasting) be between the PFC and PIG.  Otherwords, the PFC 
connected across the two variac outputs (+Vac and -Vac out), ballast 
between one of the variac outputs and a PIG input, and the other PIG 
input connected directly to the other variac output.

Gerry R.


> Original poster: Esondrmn@xxxxxxx
> David,
>
> I think your caps in series with the transformer are acting like a 
> capacitive ballast, and possibly causing a 60 hz resonance 
> problem.  Pfc caps should be connected directly across the input 
> terminals (in parallel) to the transformer.
>
> Ed Sonderman