hehehe not suprising -- now if I could get the reference design from the datasheet to model -- I'd be in hog heaven :)
our 220v is really a pair of 120v lines 180 out of phase, when you plug into a 120 socket, the "nuetral" side is pretty much power company ground
so sticking a full wave bridge on it directly gets you half wave pulses :) -- you need both sides to get full wave rectified output
I dont REALLY need earth ground referenced, but it would make some other issues I have to deal with one HECK of a lot easier
Trying to avoid iron as much as possible, and I see what you mean about pain :)
I've been trying off and on for 24+ hours now to get a pos->pos boost to work side by side with a neg->pos boost with a shared ground tied to power company ground (modeled as 2 120v sources, 180 phased, with neg sides tied to ground, pos sides feeding a full bridge and splitting the pos and neg to the 2 boost modules.
I'm getting close -- not using full PFC yet -- just a fixed gate pulse to see where things are going.. and I'm getting fairly stable output, but have one major weird thing going on.... HV spikes showing up on the rectified input to the positive boost that need to go away ... they start on the falling edge of the input voltage pulse, continue through zero and into the begining of the next pulse, with a particularly hard spike as the input voltage bottoms out and starts back up. its got to be the inductor causing it somehow since it is being switched on the other side by the mosfet to ground, so maybe the PFC will make it go away. If you dont think that will help, I'd love to hear what it might be -- Spice simalation available on request :)
Other than that -- its behaving as well as can be expected since I havent fine tuned any of the component values yet, and am still using a spice switch instead of a FET or IGBT.... once all that is done, I'll pack it up in a subckt and start on the PFC controller and stuffing enough of these in parallel to handle my load requirements :)