I agree and it looks great too! The size is reasonable too considering what it's doing... Really really cool Kevin I love it. I think it's actually really neat with the dual coils!
Bill On Fri, Oct 4, 2019, 5:12 PM Kevin A. <[email protected]> wrote: > 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 <[email protected]> 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 [email protected]. >> 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 a topic in the > Google Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/uqpK9r37Frw/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/CALcVLKLsoEN6cS4o1UOkZqGdNe%2BMnq538U4Sx2SNcXikWw-rng%40mail.gmail.com > <https://groups.google.com/d/msgid/neonixie-l/CALcVLKLsoEN6cS4o1UOkZqGdNe%2BMnq538U4Sx2SNcXikWw-rng%40mail.gmail.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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CADToqn2eSgsB1TRbzvk2Gpc49h%2Bk98WMfv96P4whKVvCn4pnmA%40mail.gmail.com.
