Thanks! That's right; at 15:1 for 40 watts, its unusual to see a single inductor boost stage. Like you said, the usual solution would be a flyback transformer. The duty cycle for this design is around 94% at max load, but it works!
Why do anything the conventional way if your goal is to power a ton of huge nixie tubes? On Fri, Oct 4, 2019, 6:48 PM gregebert <gregeb...@hotmail.com> wrote: > With such a high boost-ratio, the other alternative is a flyback > converter, which is almost identical except there is a secondary winding > that goes to the high-voltage side. > > Basically to get more voltage out of a boost-converter, you need more > current. There are only 2 ways to do that if you've maxxed-out your > duty-cycle: > > 1. Increase the supply voltage (which is not an option) > 2. *Reduce* the inductance in order to increase the current. > > By paralleling the inductors, you went with option 2. By doing so, you cut > the peak-current in half, which keeps you away from saturation, and it also > reduces the RMS current, which reduces heating losses. > > Glad to see you got it working! > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/7808223a-47c2-4812-aa45-b6776763faf0%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/7808223a-47c2-4812-aa45-b6776763faf0%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CALcVLKLsoEN6cS4o1UOkZqGdNe%2BMnq538U4Sx2SNcXikWw-rng%40mail.gmail.com.
