I was looking for a good option to charge my 450V 6800uF Electrolytic Capacitors. I initially followed the dc - dc booster path with a voltage divider comparator (op-amp) something similar to
But then realized a still have several MOTs (Microwave Oven Transformers) that will convert my 110v up to around 440v ac. toss in a bridge rectifier and a HV smoothing Capacitor Bank from my old Tesla Coil and a Variac to fine tune the numbers and I feel like I'm pretty close. I think I will end up with the more portable DC - DC booster but I don't need to be portable in my Lab while I setup the initial experiments so the bulky AC - DC route seems simpler. The end goal is the multi stage coil gun but I want to fine tune the coils and saturations before worrying about shrinking it down. Some thoughts on a specific design that would allow for a fairly safe (for the capacitors) charge rate and method to stop charging when full or a little under full to extend life. I have a smaller transformer from a bug zapper but the voltage is higher and the amps are pretty low so I figured MOT would be best. I am trying to keep it simple (ish) because I learned the more feature pack we make things the more opportunities for system failures there are and with HV systems mistakes can be lethal. I'm open to any and all approaches as this part of the project only just started and I haven't committed many resources to any one method.
This is what my second look was and it seemed good. sooo simple... Thoughts?