Thanks guys. As usual, lots of useful feedback. I would like to ask more about a couple of the comments though:
As regards air gaps: My understanding is that they reduce the magnetic permeability and thus the inductance (while increasing Isat?). As such, I figure that for off-the-shelf parts that that should already be factored in to the specs, air gap or no? If I am winding my own, and I have separable cores, then I should definitely include that though? When used in flyback power supplies, I assume that the output voltage still follows the winding ratio but that the input voltage is actually that of the back-emf induced by the field collapsing in the input coil? Is there something else happening? What happens if the two coils wrap around cores of different permeability? Is the voltage ratio actually the square-root of the inductance ratio? i.e. if inductance ratio is 1:100, then voltage ratio is 1:10 regardless of the number of windings? A bit of a leap there: I assume the inductance varies with the square of the number of turns? Also need to keep an eye on the isolation voltage - a few I looked at had very low isolation voltages, I assume that would not end well for my purposes? That LPR6235 is a perfect example of a transformer I couldn't find! After you pointed it outAnd yes I tried to order samples, but they rumbled that I wasn't going to go into production and said it wasn't their policy to send samples out to people like me (I paraphrase, I am not trying to imply that they were nasty about it or anything). Understandable, but a little disappointing. I guess I'll just have to try and buy one from somewhere! And yes, High voltages are fascinating :-) > -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b01174ef-fa24-4c0d-99e9-ebddbc8dfa12%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
