I just looked at the above link you provided Stefan,
I can tell you with great certainty that IS NOT
just a power factor correction unit.
Yes, power correction units have additional components,
they have an IC, and a bank of power components on heatsink.
Dedicated single IC examples:
http://www.fairchildsemi.com/whats_new/pfc.htmlhttp://www.irf.com/product-info/smps/fs8383.htmlhttp://focus.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=406&uiTemplateId=NODE_STRY_PGE_TThese switch in and out of circuit large capacitors at the feedpoint,
based on the overall misalignment of load to line (Power Factor).
This unit has only a couple on small electrolytic's (A top),
and medium sized ones at the other end (Vid bottom.).
Those are polarity sensitive components that are not
the type needed to apply to a line as power correction.
There is a complete lack of regular capacitors in it...
I do see what would be needed to make a buck supply.
The whole lead/lag aspect of connecting an inductive load
to a supply line that is in itself and inductor (Really long feed)
can never end well.
But convention has been on individual motors to supply a "Run" cap
to offset the inductance to bring the load more in sync with the sine.
The idea of a buck supply filling the empty gap
in the lagging waveform is novel.
But it would be the size of a fridge if you tried to make one.
If someone wants to buy it,
I'll reverse engineer it.
Board layout, schematic, and theory
all on a silver platter if you wish!
I'll do it for free even.
Now if you asked my if I could make a buck circuit to spin
a faraday disc power meter backwards with only a light bulb load.
An have it fit in that box...yeah, thats do-able...LOL.
Just think phase lead instead of phase lag.
Note 1:
Edited to remove yet more of those pesky capital "A" intrusions
that replaced a whole word...
This time all instances of the word "Vid" were replaced...
Note 2:
I had to edit the edit (Note 1) to replace the word "Vid" in it too...
Note 3:
OK, this is getting fustrating.
Both the instances in the above post,
and in the above "Note 1" changed back
when I wrote "Note 2"
Look, if you see an "A" in this post guys,
replace it with "V I D" (Spaces on purpose...)