Your grasp of transistors, biasing, current limiting resistors and such, looks to be quite good.
Your schematic drawing skills leave much to be desired! Preferably, signals travel from left to right, and power from top to bottom (+ to -).
I'm curious why you're using any 555s at all, given that you seem to understand transistors and comparators well enough -- the 555 has many downsides, and while it can be used in many things, it's almost always a burden and a constraint, in any practical design.
Your grasp of control loops, and signals and analysis, is not quite so developed, though. Something to work on.
FYI, your "PFC" circuit isn't -- if for no other reason than C3 and C11 being present. You also have no means of sensing the input AC voltage and current, so how could it ever possibly correct its power factor?
Consider the definitions of control loops, stability of simple linear systems, and the physics of converters (the state variable is the inductor current -- control that, first!).
Cheers,
Tim
I chose the 555 because it was a GP oscillator with voltage controlled duty cycle. You're quite correct it's been quite a pain, but that's the fun part, right?, lol.
I had been under the impression that being the NE555 and the comparator maintained a 360V output, no matter what the load or input voltage at the rectifier it was actually correcting the power factor.
Why do the input caps (C3 & C11) change the PFC?
I'll work on my knowledge of control loops, now that I actually know what to look up.
You have no Idea how much I'll learn today because of the small amount of information you've provided.
Though, I thought I had the inductor current issue solved. In that trace the supply is under >1kw load @360Vdc , so I thought the peaks weren't bad because without a load, if memory serves me the highest peak is 15A.
The transformer steadily peaks at about 3.5A.
I know the wave clippers consume too much current but when I decrease in input current, clip and amplify, the flyback switching gets distorted and the low end is above 1V, however it works fine with the boost converter? I'm guessing it's a sinking issue, because when I run it as you see it in the schematic it works (a little distortion but not much), however I'd like to perfect that and have as nice an output wave as goes in (inductively loaded).
I'll work on neater schematics based on the guidelines you gave me to follow.
Thanks again for the information, it's much appreciated.
Gil.