Here is a helpful link about air-gaps: http://info.ee.surrey.ac.uk/Workshop/advice/coils/gap/index.html
What isn't obvious is that an air-gap results in higher stored energy for a given core size (you can do the math from energy=0.5LI^2, and I=Vt/L) because current-squared is the dominant term, and lowering the inductance results in higher current (assuming voltage & time are fixed). For a flyback converter, stored-energy is the name of the game. Another, less-obvious, advantage to an air gap is that it reduces the variation of inductance due to variations in permeability of the core material. This is very important for manufacturing/design quality control. -- 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/0d94d2b1-64d7-41de-ae67-575d2f161160%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
